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雜志簡介

主辦單位: 蘇州混凝土水泥制品研究院
中國混凝土與水泥制品協會

主編 : 李建華
常務副主編 : 王春蓉
刊期 : 月刊
電話 : 0512-68285716
E-mail : sccpitg@126.com
國內統一刊號(CN) : 32-1173/TU
國際標準刊號(ISSN) : 1000-4637
郵發代號 : 28-80

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掃碼訂購雜志

混凝土研究

新拌UHPC凈漿的工作性與流變性試驗研究

黃靜1，季文玉1，閻培渝2

2022年第1期

摘要

引用本文

摘 ? 要：通過正交試驗研究了水膠比、超細粉煤灰摻量和硅灰摻量對新拌UHPC凈漿的工作性與流變性的影響，選取流動度、黏度系數和水膜層厚度為工作性與流變性的衡量指標，利用綜合平衡法獲得了最優配合比。試驗結果表明：水膠比、超細粉煤灰摻量和硅灰摻量的提高都會造成UHPC凈漿的流動度和顆粒表面水膜層厚度增大，黏度系數減??；超細粉煤灰摻量是凈漿工作性和流變性的主要影響因素，水膠比次之，硅灰摻量的影響最??；UHPC最優配合比：水膠比為0.2，超細粉煤灰摻量為40%，硅灰摻量為8%；以該配合比的成型的UHPC 28 d抗壓強度為128.8 MPa，抗拉強度為20.3 MPa，同時滿足工作性和力學性能要求，且經濟合理。 Abstract: An orthogonality test was carried out for study on the effect of W/C ratio, the superfine fly ash and silica fume content on workability and rheological properties of fresh paste of UHPC, and flow spread, consistency coefficient and water film thickness on particles were taken as the measures of workability and rheological properties. The comprehensive balance method was used to obtain the optimal mix proportion of UHPC. The results show that the increase of W/C ratio, the superfine fly ash and silica fume content of UHPC enhances its water film thickness on particles and flowability, reduces its coefficient of viscosity. The superfine fly ash content is the main factor that affects the workability and rheological properties of UHPC, followed by W/C ratio and silica fume content. The optimal mix proporition of UHPC of the W/C is 0.2, superfine fly ash content of 40% and silica fume content of 8%. The 28 d compressive strength of the UHPC is 128.8 MPa and its flexurary strength is 20.3 MPa. It shows a satisfied workability and mechanical properties, as well as a reasonable economy．

黃靜,季文玉,閻培渝.新拌UHPC 凈漿的工作性與流變性試驗研究[J].混凝土與水泥制品,2022(1):1-6. HUANG J,JI W Y,YAN P Y.Experimental Study on Workability and Rheological Properties of Fresh Paste of UHPC[J].China Concrete and Cement Products,2022(1):1-6.

陶砂對3D打印砂漿力學與微觀性能的影響

陳傳峰，劉晨曦，李思琪，孫傳珍，馮竟竟

2022年第1期

摘要

引用本文

摘 ? 要：用陶砂部分替代河砂制備了3D打印砂漿，并對該砂漿的流動性、抗壓強度以及微觀孔結構進行了研究。試驗結果表明：砂漿的流動度在170~180 mm時具有良好的可打印性；隨陶砂摻量的增加，3D打印砂漿的抗壓強度降低，當陶砂的體積摻量為30%時，砂漿試件28 d的抗壓強度為14.7 MPa；隨著陶砂摻量的增大，砂漿3 d齡期的孔隙率呈現先增大后減小的趨勢，其中，陶砂體積摻量為30%時，砂漿的孔隙率最小，此時無害孔和少害孔所占的比例最大。 Abstract: Ceramic sand was used to partially replace river sand, and the fluidity, compressive strength and microscopic pores structure of 3D printed mortar were studied. The test results show that the mortar has good printability when the fluidity is 170~180 mm. With the increase of ceramic sand content, compressive strength of 3D printed mortar decreses. When the volume content of ceramic sand is 30%, the 28 d compressive strength of mortar test block is 14.7 MPa. With the increase of ceramic sand content, the porosity of mortar at 3 d increases first and then decreases. When the volume content of ceramic sand is 30%, the porosity of mortar is the smallest, and the proportion of harmless holes and less harmful holes is the largest.

陳傳峰,劉晨曦,李思琪,等.陶砂對 3D 打印砂漿力學與微觀性能的影響[J].混凝土與水泥制品,2022(1):7-11. CHEN C F,LIU C X,LI S Q,et al.Influence of Ceramic Sand on Mechanical and Microscopic Properties of 3D Printed Mortar[J].China Concrete and Cement Products,2022(1):7-11.

微珠對隧道工程混凝土性能的影響及機理研究

王濤1，胡琪1，吳紹明2，儲洪強1，陳峰2，趙文文1,丁天云1，蔣林華1

2022年第1期

摘要

引用本文

摘 ? 要：針對廣州新白云國際機場隧道工程建設中大體積混凝土的溫度裂縫問題，通過復摻微珠和粉煤灰，研究了微珠摻量對混凝土的力學性能、干燥收縮、水化熱以及早期抗裂性能的影響，并采用SEM分析了微珠對水泥水化反應的作用機理。結果表明：當礦物摻合料總量一定時，隨著微珠摻量的增加，混凝土的力學性能早期變化較小，后期呈現出先增加后下降的趨勢，且微珠摻量為10%時，混凝土養護60 d的抗壓強度、劈裂抗拉強度以及彈性模量最高；混凝土干縮率隨著微珠摻量的增加而減小，且這種趨勢隨齡期的增加而增大，當微珠摻量15%時，60 d混凝土的干縮率最??；當微珠摻量為10%時，混凝土早期抗裂性能最佳，平板試件表面24 h內無裂縫；微珠摻量對膠凝材料水化熱總量影響較小，但對水化放熱峰值及峰值產生時間影響較大；微珠可以加速漿體早期的水化進程，減少硬化漿體的孔隙，使其結構更密實。 Abstract: In order to solve the temperature crack problem of the mass concrete structure in the construction of the Guangzhou New Baiyun International Airport tunnel engineering, the mechanism and effect of microbeads content on the macro-performance of concrete were performed, which specifically includes mechanical properties, dry shrinkage performance, heat hydration and early cracking resistance. Moreover, SEM was used for exploring the influence of microbeads on the hydration of cement. The results show that with the increase of microbeads content, the mechanical properties of concrete present no changes in the early stages, and increases first, then decreases in the later stages when the total content of mineral admixture is unchanged. When microbeads content is 10%, the compressive strength, splitting tensile strength and elastic modulus of concrete at 60 d are the highest. The dry shrinkage rates of concrete decrease with the increase of microbeads content, and the improvement becomes even bigger with the increase of curing age. The dry shrinkage of concrete at 60 d is the smallest when the content of microbeads is 15%. The early cracking resistance of concrete is the best with 10% microbeads, which can be manifested as no obvious cracks on the surface of the flat specimen within 24 h. Microbeads has little impact on the total hydration heat, and has a great influence on the peak and its arrival time of hydration exothermic rate. Microbeads can accelerate the early hydration process of cement and decrease the porosity of cement paste, which can make microstructure denser.

王濤,胡琪,吳紹明,等.微珠對隧道工程混凝土性能的影響及機理研究[J].混凝土與水泥制品,2022(1):12-16,21. WANG Tao, HU Qi, WU Shao-ming,et al.Mechanism and Effect of Microbeads on the Properties of Concrete for the Tunnel Engineering[J].China Concrete and Cement Products,2022(1):12-16,21.

隧道襯砌混凝土抗溶蝕性能影響因素研究

田釗1,周瑩2,3,伍洲1,穆松2,3,張建喜4,劉凱2,3

2022年第1期

摘要

引用本文

摘 ? 要：以廣東某隧道工程為例，研究了水膠比、礦物摻合料和砂率對混凝土早期抗壓強度、抗滲性能、抗氯離子滲透性能和抗溶蝕性能的影響。結果表明：隨著水膠比的減小，混凝土早期抗壓強度、抗滲性能、抗氯離子滲透性能和抗溶蝕性能均提高；摻入適量的礦物摻合料降低了混凝土的早期抗壓強度和抗滲性能，但提高了混凝土的抗氯離子滲透性能和抗溶蝕性能；隨著砂率的增加，混凝土的早期抗壓強度先降低后提高，抗滲性能、抗氯離子滲透性能、抗溶蝕性能提高，最佳砂率為45%；綜合對比得到了各因素對混凝土抗溶蝕性能的提高效果為：水膠比>礦物摻合料>砂率。 Abstract: Taking a tunnel project in Guangdong as an example, the effects of water-binder ratio, mineral admixture and sand ratio on the early compressive strength, impermeability, resistance to chloride ion penetration and corrosion resistance of concrete were studied. The results show that as the water-binder ratio decreases, the early compressive strength, impermeability, resistance to chloride ion penetration and corrosion resistance of concrete all increase. The appropriate addition of mineral admixtures reduces the early compressive strength and impermeability of concrete, but improves the resistance to chloride ion penetration and corrosion resistance of concrete. As the sand ratio increases, the early compressive strength of concrete decreases first and then increases, and the impermeability, resistance to chloride ion penetration, and corrosion resistance are improved. The best sand ratio is 45%. Comprehensive comparison of the effects of various factors on the anti-corrosion performance of concrete is: water-binder ratio>mineral admixture>sand ratio.

田釗,周瑩,伍洲,等.隧道襯砌混凝土抗溶蝕性能影響因素研究[J].混凝土與水泥制品,2022(1):17-21. TIAN Z,ZHOU Yi,WU Z,et al.Study on Factors Affecting the Corrosion Resistance Performance of Tunnel Lining Concrete[J].China Concrete and Cement Products,2022(1):17-21.

低溫環境下石灰巖機制砂砂漿抗硫酸鹽侵蝕性能研究

鄧俊雙1，徐志華1，李北星2，李龍2

2022年第1期

摘要

引用本文

摘 ? 要：為研究低溫環境下石灰巖機制砂及石粉對混凝土抗硫酸鹽侵蝕性能的影響，以摻/未摻石灰巖石粉的機制砂砂漿、摻/未摻石灰巖石粉的天然砂砂漿為模擬對象，結合硫酸鹽腐蝕介質及低溫環境特點，采用溫度（5±1）℃的5%的MgSO4溶液模擬服役環境，對比研究了不同腐蝕齡期（0 d、60 d、90 d、210 d、270 d、360 d）試件的外觀和強度變化，并基于XRD、FTIR測試分析了侵蝕產物。結果表明：隨著齡期的增長，侵蝕方式由傳統的鈣礬石型硫酸鹽侵蝕逐漸過渡到以碳硫硅酸鈣為侵蝕產物的TSA巖侵蝕；石灰巖機制砂和石粉均能促使砂漿產生TSA侵蝕，且石粉的影響更加明顯。 Abstract: In order to study the influence of limestone manufactured sand and limestone rock fines on the sulfate resistance of concrete under low temperature environment, the two kinds of manufactured sand mortars mixed with or without limestone rock fines, and the two kinds of natural sand mortars incorporated with or without limestone rock fines were used as the simulate objects. Combined with the characteristics of sulfate corrosion medium and low temperature environment, 5% magnesium sulfate solution at (5±1)℃ was used to simulate the service environment. The changes of appearance and strength for the mortar specimens at different corrosion ages (0 d, 60 d, 90 d, 210 d, 270 d, 360 d) were compared and studied, and the corrosion products were analyzed by X-ray diffraction (XRD) and fourier transform infrared spectroscopy (FTIR). The results show that with the increase of erosion age, the erosion mode gradually transits from traditional ettringite type sulfate attack to thaumasite sulfate attack (TSA) with thaumasite as the erosion product. Limestone manufactured sand and limestone rock fines all can promote the TSA of mortar and concrete, and the effect of limestone rock fines is more obvious.?

鄧俊雙,徐志華,李北星,等.低溫環境下石灰巖機制砂砂漿抗硫酸鹽侵蝕性能研究[J].混凝土與水泥制品,2022(1):22-26. DENG J S,XU Z H,LI B X,et al.Sulfate Resistance of Limestone Manufactured Sand Mortar in Low Temperature Environment[J].China Concrete and Cement Products,2022(1):2022(1):22-26.

基于細觀模型的混凝土力學性能研究進展

程想，曹俊鑫，王玲玲，趙銀霜，孔德文

2022年第1期

摘要

引用本文

摘 ? 要：通過細觀模型預測方法建立了混凝土骨料特性與宏觀力學性能的聯系，可實現混凝土力學性能的預測。歸納了混凝土細觀模型的主要結構形式及建模方法，總結了骨料體積率、形狀、粒徑尺寸等對混凝土靜、動態力學性能的影響規律，闡述了骨料體積率、分布形式、粒徑尺寸等因素對混凝土強度與彈性模量的影響程度。提出了細觀模型預測混凝土宏觀力學性能研究中待解決的問題。 Abstract: The relationship between the properties of concrete aggregates and the macro-mechanical properties is established through the meso-model prediction method, which can realize the prediction of the concrete mechanical properties. The main structural forms and modeling methods of the concrete meso-model are summarized, and the influence laws of aggregate volume rate, shape, particle size on the static and dynamic mechanical properties of concrete are summarized, and the influence degree of aggregate volume rate, distribution form, and particle size on the strength and elastic modulus of concrete are described. The problems to be solved in the study of the meso-model predicting the macro-mechanical properties of concrete are put forward.

程想,曹俊鑫,王玲玲,等.基于細觀模型的混凝土力學性能研究進展[J].混凝土與水泥制品,2022(1):27-32,37. CHENG X,CAO J X,WANG L L,et al.Research Progress in Mechanical Properties of Concrete Based on the Mesoscopic Model[J].China Concrete and Cement Products,2022(1):27-32,37.

珊瑚混凝土的尺寸效應及損傷破壞特征研究

郭德豪1，張妍2，周聰3，黃玉榮4，尚致晨5

2022年第1期

摘要

引用本文

摘 ? 要：利用MTS試驗系統，研究了珊瑚混凝土的早期強度增長規律、單軸壓縮強度的尺寸效應、破壞模式以及損傷演化特征。結果表明：海水拌制的珊瑚混凝土具有明顯的早強特點，養護3 d和7 d試件的相對強度分別可達到0.84和0.90；高徑比（長寬比）對試件的單軸壓縮強度有較大影響，高徑比（長寬比）越大，試件的峰值強度越大，殘余強度越小，且表現出顯著的脆性破壞特征；單軸壓縮條件下，珊瑚混凝土的破壞模式以張拉破壞為主，其破壞形態為斷裂裂紋貫穿骨料破壞；借助聲發射系統，監測到聲發射振鈴數與試件的宏觀力學性能緊密相關。 Abstract: The MTS test system was utilized to study the early strength growth law, size effect of uniaxial compression strength, failure mode and damage evolution of coral aggregate concrete. The results show that coral aggregate concrete mixed by seawater has obvious characteristics of early strength and its relative strength after curing 3 d and 7 d can reach 0.84 and 0.90 respectively. The uniaxial compressive strength of specimens is significantly affected by height-diameter ratio(length-width ratio). The higher the height-diameter ratio(length-width ratio) is, the higher the peak strength is and the smaller the residual strength is, showing a significant brittle failure characteristic. Under uniaxial compression, the main failure mode of coral aggregate concrete is tensile failure and its fracture surface runs through the aggregate. With the aid of the acoustic emission system, the number of acoustic emission ringing is closely related to the macro-mechanical properties of the specimen.

郭德豪,張妍,周聰,等.珊瑚混凝土的尺寸效應及損傷破壞特征研究[J].混凝土與水泥制品,2022(1):33-37. GUO D H,ZHANG Y,ZHOU C,et al.Study on Size Effect and Failure Characteristics of Coral Aggregate Concrete[J].China Concrete and Cement Products,2022(1):33-37.

水泥混凝土制品

纖維種類對超高性能混凝土電桿性能的影響研究

駱靜靜1，田寅1，張立力1，陳晶晶1，王濤2，蘇強2

2022年第1期

摘要

引用本文

摘 ? 要：為研究聚丙烯纖維（PP纖維）、耐堿玻璃纖維（BX纖維）、鋼纖維（GX纖維）對超高性能混凝土（UHPC）電桿力學性能和耐久性能的影響，在前期摻量優選試驗基礎上，采用臥式離心工藝成型了規格為?覫190×12×M×BY的UHPC 電桿，并進行了力學性能和耐久性能試驗。結果表明：不同纖維種類對UHPC 折壓比的影響從高到底依次為：GX纖維、BX纖維、PP纖維；三種纖維均可提高UHPC 的耐久性，但效果不顯著；三種纖維對UHPC 電桿力學性能的影響由高到低依次為：GX纖維、BX纖維、PP纖維；三種纖維UHPC 電桿均滿足相關標準要求，考慮電桿外觀和經濟性，可使用PP纖維和BX纖維生產UHPC 電桿。 Abstract: In order to study the effects of polypropylene fiber, alkali resistant glass fiber and steel fiber on the mechanical properties and durability of ultra-high performance concrete poles, based on the preliminary content optimization test, the ?覫190×12×M×BY ultra-high performance concrete poles were produced by horizontal centrifugal process, and the mechanical properties and durability tests were carried out. The results show that the effects of different fiber types on the flexural compression ratio of ultra-high performance concrete from high to low are steel fiber, alkali resistant glass fiber and polypropylene fiber. Three kinds of fibers can improve the durability of ultra-high performance concrete, but the effect is not significant. The effects of three fibers on the mechanical properties of UHPC poles ?from high to low are steel fiber, alkali resistant glass fiber and polypropylene fiber. Three kinds of fibers all can meet the requirements of relevant standards. Considering the appearance and economy of poles, polypropylene fiber, alkali resistant glass fiber can be recommended to used to produce UHPC poles.

駱靜靜,田寅,張立力,等.纖維種類對超高性能混凝土電桿性能的影響研究[J].混凝土與水泥制品,2022(1):38-40. LUO J J,TIAN Y,ZHANG L L,et al.Study on the Influence of Fiber Types on the Performance of Ultra-high Performance Concrete Poles[J].China Concrete and Cement Products,2022(1):38-40.

C105管樁混凝土設計參數取值的探討

何友林，茹軍輝，李龍

2022年第1期

摘要

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通過試驗得出了C105混凝土100 mm×100 mm×100 mm立方體非標準試件抗壓強度換算系數以及C105混凝土的標準方差和強度變異系數。采用理論計算，得到了棱柱體抗壓強度與立方體抗壓強度的比值αc1，并與試驗實測平均值進行了比較，驗證了理論計算方法的可行性。此外，通過對比分析，探討了直接外延法和引用公式法兩種C105混凝土設計參數計算方法的正確性，研究結果可為C105管樁混凝土的設計和應用提供參考。 Abstract: The conversion coefficient of C105 concrete compressive strength was obtained for the size of the 100 mm×100 mm×100 mm cubic specimen by testing. And the standard deviation and strength variable coefficient were obtained by statistical analysis. The ratio αc1 of prismatic compressive strength to cubic compressive strength was obtained by theoretical calculation, and compared with the measured average value, which verifies the feasibility of the theoretical calculation method. In addition, through the comparative analysis, the correctness of the direct epitaxy method and quoted formula method of C105 concrete design parameters was systematically discussed, and the research results can provide a reference for the design and application of C105 pile concrete.

何友林,茹軍輝,李龍.C105管樁混凝土設計參數取值的探討[J].混凝土與水泥制品,2022(1):41-43,47. HE Y L,RU J H,LI L.Discussion on Design Parameters Value Selection of C105 Piles Concrete[J].China Concrete and Cement Products,2022(1):41-43,47.

預制管片混凝土裂縫控制技術研究

溫泉武

2022年第1期

摘要

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摘　要：為抑止混凝土收縮，配制出滿足工作性、力學性能、耐久性要求，又經濟合理的預制管片用混凝土，依據SL/T 352—2020《水工混凝土試驗規程》，通過降低混凝土漿體總量等方法，試驗研究了不同水膠比和粉煤灰摻量對管片用混凝土強度的影響。在配合比優選基礎上，提出了管片生產澆筑和養護過程中的工藝控制措施，可為管片的生產提供參考。 Abstract: In order to inhibit concrete shrinkage, and prepare precast segment concrete that meets the requirements of workability, mechanical properties and durability, according to the SL/T 352—2020 Test Code for Hydraulic Concrete, the effects of different water binder ratio and fly ash content on concrete strength are studied by reducing the total amount of concrete slurry. On the basis of mix proportion optimization, the precautions in the process of segment production, pouring and maintenance are put forward, which can provide technical solutions for the production site.

溫泉武.預制管片混凝土裂縫控制技術研究[J].混凝土與水泥制品,2022(1):44-47. WEN Q W.Research Crack Control Technology of Precast Segment Concrete[J].China Concrete and Cement Products,2022(1):44-47.

纖維水泥及制品

機制砂超高性能混凝土（UHPC）性能影響因素試驗研究

馬正先，趙雅萌，陳炳江，肖文帥，孫立剛

2022年第1期

摘要

引用本文

摘 ? 要：超高性能混凝土（UHPC）在擁有超高力學性能的同時普遍存在流動性較差的問題。為了尋求二者之間的平衡，首先通過單因素試驗分析了石英砂摻量、粉煤灰摻量、減水劑摻量和鋼纖維摻量對UHPC流動性及抗壓強度的影響，其次利用正交試驗得出了各因素對UHPC流動性及抗壓強度影響的主次順序，確定了最優配合比。結果表明：當石英砂摻量為32%（機制砂摻量為68%）、粉煤灰摻量為15%、減水劑摻量為0.39%、鋼纖維摻量為2%時，配制出的UHPC工作性和力學性能良好，并成功應用于某高架橋維修加固工程中。 Abstract: Ultra-high performance concrete (UHPC) generally has the problem of poor fluidity while having ultra-high mechanical properties. In order to find the balance between ultra-high mechanical properties and fluidity, firstly, the effects of quartz sand content, fly ash content, water-reducing agent content and steel fiber content on the fluidity and compressive strength of UHPC were analyzed through single factor tests. Secondly, the primary and secondary order of the influence of various factors on the fluidity and compressive strength of UHPC was obtained by orthogonal test, and the optimal mix proportion was determined. The results show that when the content of quartz sand is 32%(the content of machine-made sand is 68%), the content of fly ash is 15%, the content of water-reducing agent is 0.39%, and the content of steel fiber is 2%, the prepared UHPC has good workability and mechanical properties, and has been successfully applied to a viaduct maintenance and reinforcement project.

馬正先,趙雅萌,陳炳江,等.機制砂超高性能混凝土（UHPC）性能影響因素試驗研究[J].混凝土與水泥制品,2022(1):48-52,63. MA Z X,ZHAO Y M,CHEN B J,et al.Experimental Study on Influencing Factors of Machine-made Sand Ultra-high Performance Concrete (UHPC) Performance[J].China Concrete and Cement Products,2022(1):48-52,63.

PVA纖維混凝土凍融循環損傷規律及模型研究

趙小明1，王新科2，喬宏霞2，黃瑞1

2022年第1期

摘要

引用本文

摘 ? 要：研究了PVA纖維的體積摻量（0.05%、0.10%、0.15%）和長度（8 mm、12 mm）對混凝土相對動彈性模量、質量損失率和力學性能的影響，分析了PVA纖維混凝土的凍融損傷規律，建立了以相對動彈性模量為對象的Weibull概率分布損傷模型。結果表明：隨著凍融循環次數的增加，體積摻量為0.10%、長度為8 mm的PVA纖維對混凝土抗凍性能的提升效果最好；建立的Weibull概率分布損傷模型可以有效反映PVA纖維混凝土的凍融損傷劣化規律，可為實際工程應用提供參考。 Abstract: The effects of PVA fiber volume content (0.05%, 0.10%, 0.15%) and length (8 mm, 12 mm) on the relative dynamic elastic modulus, mass loss rate and mechanical properties of concrete were studied, and the freeze-thaw damage law of PVA fiber reinforced concrete was analyzed, and the Weibull probability distribution damage model based on the relative dynamic elastic modulus was established. The results show that with the increase of freeze-thaw cycles, PVA fiber with volume content of 0.10% and length of 8 mm has the best effect on improving the frost resistance of concrete. The established Weibull probability distribution damage model can effectively reflect the freeze-thaw damage and deterioration law of PVA fiber reinforced concrete, and can provide a reference for practical engineering applications.

趙小明,王新科,喬宏霞,等. PVA纖維混凝土凍融循環損傷規律及模型研究[J].混凝土與水泥制品,2022(1):53-57. ZHAO X M,WANG X K,QIAO H X,et al.Study on Freeze-thaw Cycle Damage Law and Model of PVA Fiber Reinforced Concrete[J].China Concrete and Cement Products,2022(1):53-57.

混雜纖維再生混凝土軸壓應力-應變關系研究

牛海成1，吉珈琨2，張耀宗1

2022年第1期

摘要

引用本文

摘 ? 要：研究了再生粗骨料取代率、纖維的體積摻量和摻入方式對再生混凝土性能的影響，根據實測應力-應變曲線，計算出了各組試件的壓縮韌度指數和彈性模量。結果表明：再生混凝土的抗壓強度略低于天然骨料混凝土，摻入纖維可顯著提高再生混凝土的抗壓強度、韌性和彈性模量；單摻時，對于抗壓強度和彈性模量，玻璃纖維、PVA纖維的最佳摻量分別為0.45%、0.05%，對于韌性，玻璃纖維、PVA纖維的最佳摻量分別為0.45%、0.10%；當再生粗骨料取代率為50%時，玻璃纖維和PVA纖維混雜摻加對再生混凝土抗壓強度、韌性和彈性模量的提升效果優于單一纖維；當再生粗骨料取代率為100%時，單一纖維對再生混凝土抗壓強度、韌性和彈性模量的提升效果優于混雜纖維。 Abstract: The effects of recycled coarse aggregate replacement rate, fiber volume content and fiber mixing method on the properties of recycled concrete were studied. According to the measured stress-strain curve, the compressive toughness index and elastic modulus were calculated. The results show that the compressive strength of recycled concrete is slightly lower than that of natural aggregate concrete, and the addition of fibers can significantly improve the compressive strength, axial toughness and elastic modulus of recycled concrete. In single blending, for compressive strength and elastic modulus, the optimum content of glass fiber and PVA fiber is 0.45% and 0.05% respectively, and for toughness, the optimum content of glass fiber and PVA fiber is 0.45% and 0.10% respectively. When the replacement rate of recycled coarse aggregate is 50%, the improvement effect of mixed addition of glass fiber and PVA fiber on the compressive strength, toughness and elastic modulus of recycled concrete is better than that of single fiber. When the replacement rate of recycled coarse aggregate is 100%, the improvement effect of single fiber on the compressive strength, toughness and elastic modulus of recycled concrete is better than that of hybrid fiber.

牛海成,吉珈琨,張耀宗.混雜纖維再生混凝土軸壓應力-應變關系研究[J].混凝土與水泥制品,2022(1):58-63. NIU H C,JI J K,ZHANG Y Z.Stress-strain Relationship of Hybrid Fiber Reinforced Recycled Concrete Under Axial Compression[J].China Concrete and Cement Products,2022(1):58-63.

房建材料及制品

FRP布加固鋼筋混凝土短柱軸壓性能試驗研究

閆清峰1，張紀剛1，2，張宜聰1，張夢琳1，時成龍1

2022年第1期

摘要

引用本文

閆清峰,張紀剛,張宜聰,等.FRP布加固鋼筋混凝土短柱軸壓性能試驗研究[J].混凝土與水泥制品,2022(1):64-70. YAN Q F,ZHANG J G,ZHANG Y C,et al.Experimental Study on Axial Compression Performance of Reinforced Concrete Short Columns Strengthened with FRP Sheets[J].China Concrete and Cement Products,2022(1):64-70.

玄武巖纖維筋混凝土梁正截面抗彎承載力試驗研究

熊琦龍1，周凱1，范佩1，吳小勇1，2

2022年第1期

摘要

引用本文

摘 ? 要：為了研究BFRP筋混凝土梁的抗彎性能，進行了不同配筋率和不同配筋形式BFRP筋混凝土梁的四點彎曲試驗，分析了試件的跨中撓度、抗彎承載力和裂縫分布規律。結果表明：BFRP筋混凝土梁的彎矩-撓度曲線表現出試件開裂、峰值彎矩為轉折點的三折線特征；BFRP筋與鋼筋混合配筋梁的彎矩-撓度曲線表現出試件開裂、鋼筋屈服和峰值彎矩為轉折點的四折線特征；BFRP筋與鋼筋混合配筋能提高鋼筋混凝土梁的抗彎承載力，減小BFRP筋混凝土梁的撓度和裂縫寬度，同時發揮BFRP筋強度高的特點；BFRP筋與鋼筋混合配筋梁符合平截面假定，并給出了正截面抗彎承載力計算公式。 Abstract: In order to study the flexural performance of concrete beams reinforced with BFRP rebar, the four-point bending tests of BFRP reinforced concrete beams with different reinforcement ratios and different reinforcement forms were carried out, and the mid-span deflection, flexural capacity, and crack distribution of the specimens were analyzed. The results show that the bending moment-deflection curves of BFRP reinforced concrete beams show the characteristics of three-fold curve with specimen cracking and peak bending moment as the turning point. The bending moment-deflection curves of beams reinforced with BFRP rebar and steel rebar show the characteristics of four-fold curve with specimen cracking, steel yield and peak bending moment as the turning point. The mixed reinforcement of BFRP rebar and steel rebar can improve the flexural capacity of the reinforced concrete beams, reduce the deflection and crack width of BFRP reinforced concrete beams, and the strength of BFRP rebar can be sufficiently utilized. The beams reinforced with BFRP rebar and steel rebar conform to the plane section assumption, and the calculation formula of flexural capacity of the beams is given.

熊琦龍,周凱,范佩,等.玄武巖纖維筋混凝土梁正截面抗彎承載力試驗研究[J].混凝土與水泥制品,2022(1):71-75. XIONG Q L,ZHOU K,FAN P,et al.Experimental Study on Flexural Capacity of Cross Section of Basalt Fiber Reinforced Concrete Beams[J].China Concrete and Cement Products,2022(1):71-75.

混凝土輕質墻板上墻含水率對干燥收縮影響的試驗研究

夏彬華1，楊偉軍1，易思容1，楊建宇1，姜鵬霄2

2022年第1期

摘要

引用本文

摘 ? 要：針對混凝土輕質墻板的上墻含水率及其對墻體干縮性能的影響，進行了含水率試驗，研究了混凝土輕質墻板上墻含水率對干縮性能及其防裂措施的影響，探索了混凝土輕質墻板干縮隨含水率的變化規律，提出了混凝土輕質墻板含水率時變模型，可為墻板合理的養護或上墻時間、干縮裂縫控制提供參考。 Abstract: Aiming at the moisture content during construction of the concrete lightweight wallboard and its influence on the dry shrinkage performance of the wall, the moisture content test was carried out. The influence of moisture content during construction of concrete lightweight wallboard on dry shrinkage performance and crack prevention measures was studied, and the variation law of dry shrinkage of concrete lightweight wallboard with moisture content was studied. Furthermore, the time-varying model of moisture content of concrete lightweight wallboard was put forward. The results can provide a reference for the reasonable maintenance time and the control of dry shrinkage cracks.

夏彬華,楊偉軍,易思容,等.混凝土輕質墻板上墻含水率對干燥收縮影響的試驗研究[J].混凝土與水泥制品,2022(1):76-79,94. XIA B H,YANG W J,YI S R,et al.Experimental Study on the Effect of Moisture Content During Construction on Dry Shrinkage of Concrete Lightweight Wallboard[J].China Concrete and Cement Products,2022(1):76-79,94.

標準解讀

JC/T 2602—2021《預應力混凝土U形板樁》標準解讀

蔣元海，劉紅飛，熊厚仁，黃殿武，華昕若

2022年第1期

摘要

引用本文

摘 ? 要：為便于JC/T 2602—2021《預應力混凝土U形板樁》的使用方準確理解標準條款的具體含義，正確貫徹實施標準條款的具體要求和規定，簡述了該標準的編制背景、編制目的和意義，解釋說明了標準條款的具體內容，并提出了實施過程中應注意的問題。 Abstract: In order to facilitate the user of JC/T 2602—2021 Prestressed Concrete U-shaped Sheet Piles to accurately understand the specific meaning of the standard terms and correctly implement the specific requirements and provisions of the standard terms, the preparation background, purpose and significance of the JC/T 2602—2021 Prestressed Concrete U-shaped Sheet Piles is briefly described, the specific contents of the standard provisions are explained in detail, and the problems that should be paid attention to in the implementation process are put forward.

蔣元海,劉紅飛,熊厚仁,等.JC/T 2602—2021《預應力混凝土U形板樁》標準解讀[J].混凝土與水泥制品,2022(1):80-83. JIANG Y H,LIU H F,XIONG H R,et al.Interpretation on JC/T 2602—2021 Prestressed Concrete U-shaped Sheet Piles[J].China Concrete and Cement Products,2022(1):80-83.

節能與環保

廢石粉對3D打印水泥砂漿性能的影響研究

邢家瑞，于淇，全世濤，黎玥琨，劉超，鄧智聰，張亞梅

2022年第1期

摘要

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摘 ? 要：研究了石材加工產生的廢石粉替代部分水泥對3D打印水泥砂漿性能的影響。結果表明：總體上，隨著廢石粉摻量的增加，砂漿的流動度降低，靜態屈服應力提高，但凝結時間變化不明顯；通過調整減水劑摻量可以改善廢石粉對3D打印水泥砂漿流動性和可建造性的不利影響；廢石粉的摻入對3D打印水泥砂漿的力學性能和層間界面黏結強度不利。 Abstract: The effect of replacing part of cement with waste stone powder produced by stone processing on the performance of 3D printing cement mortar was studied. The results show that with the increase of the waste stone powder content, the fluidity of cement mortar decreases and the static yield stress increases in general, but the setting time does not change significantly. The adverse effect of waste stone powder on the fluidity and constructability of 3D printing cement mortar can be improved by adjusting the amount of water reducing agent. The incorporation of waste stone powder is detrimental to the mechanical properties and interface bonding strength of 3D printing cement mortar.

邢家瑞,于淇,全世濤,等.廢石粉對3D打印水泥砂漿性能的影響研究[J].混凝土與水泥制品,2022(1):84-88. XING J R,YU Q,QUAN S T,et al.Study on the Influence of Waste Stone Powder on Performance of 3D Printing Cement Mortar[J].China Concrete and Cement Products,2022(1):84-88.

攪拌站廢水對混凝土抗凍性能與力學性能的影響研究

胡涌瓊

2022年第1期

摘要

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摘 ? 要：研究了攪拌站廢水摻量（25%、35%、45%）對混凝土凍融循環后的質量損失、外觀形態、動彈性模量及抗壓強度的影響規律，建立了摻廢水混凝土的凍融損傷模型。結果表明：當廢水摻量為25%時，試件的質量損失較大，但抗壓強度及動彈性模量仍高于普通混凝土；當廢水摻量為35%和45%時，混凝土的抗凍性能得到顯著提高，但廢水摻量為45%的混凝土動彈性模量下降較快，廢水摻量為35%的混凝土抗凍性能最佳；建立的凍融損傷模型能夠較好地反映摻廢水混凝土的凍融損傷演化規律。 Abstract: The effects of the content of wastewater from concrete mixing station(25%, 35%, 45%) on the mass loss, appearance, dynamic elastic modulus and compressive strength of concrete after freeze-thaw cycle were studied, and the freeze-thaw damage model of concrete mixed with wastewater was established. The results show that when the content of wastewater is 25%, the mass loss of the specimen is large, but the compressive strength and dynamic elastic modulus are still higher than those of ordinary concrete. When the wastewater content is 35% and 45%, the frost resistance of concrete is significantly improved, but the dynamic elastic modulus of concrete with wastewater content of 45% decreases rapidly, and the frost resistance of concrete with wastewater content of 35% is the best. The established freeze-thaw damage model can better reflect the freeze-thaw damage evolution law of concrete mixed with wastewater.

胡涌瓊.攪拌站廢水對混凝土抗凍性能與力學性能的影響研究[J].混凝土與水泥制品,2022(1):89-94. HU Y Q.Influence of Wastewater from Concrete Mixing Station on the Frost Resistance and Mechanical Properties of Concrete[J].China Concrete and Cement Products,2022(1):89-94.

再生PET塑料骨料對砂漿單軸受壓性能的影響

陸俊1，鮑聰2，方劉基2，占海華3，梁超鋒2

2022年第1期

摘要

引用本文

摘 ? 要：利用廢棄PET塑料制備了再生PET塑料骨料（RPA），研究了RPA部分取代天然細骨料（0、10%、20%、30%、40%）對砂漿單軸受壓性能的影響，并建立了摻RPA砂漿的單軸受壓應力-應變本構關系。結果表明：隨著RPA取代率的增加，試件的延性增加，應力-應變曲線上升段和下降段斜率逐漸降低，峰值應力和彈性模量逐漸降低；試件的峰值應變、極限應變和抗壓韌性指數均隨著RPA取代率的增加而增大；建立的摻RPA砂漿單軸受壓本構方程計算結果與試驗結果吻合較好。 Abstract: Recycled PET plastic aggregate(RPA) was prepared from waste PET plastics. The effect of RPA partially replacing natural fine aggregate (0, 10%, 20%, 30%, 40%) on the uniaxial compressive properties of mortar was studied, and the uniaxial compressive stress-strain constitutive relationship of mortar mixed with RPA was established. The results show that with the increase of RPA replacement rate, the ductility of the specimen increases, the slopes of the rising and falling sections of the stress-strain curve gradually decrease, and the peak stress and elastic modulus gradually decrease. The peak strain, ultimate strain and compressive toughness index increase with the increase of RPA replacement rate. The established constitutive equation of the mortar mixed with RPA under uniaxial compression is in good agreement with the experimental results.

陸俊,鮑聰,方劉基,等.再生PET塑料骨料對砂漿單軸受壓性能的影響[J].混凝土與水泥制品,2022(1):95-99. LU J,BAO C,FANG L J,et al.Effect of Recycled PET Plastic Aggregate on Uniaxial Compression Performance of Mortar[J].China Concrete and Cement Products,2022(1):95-99.

讀者之友

《混凝土與水泥制品》“3D打印混凝土”與“節能利廢混凝土”專題征稿啟事

摘要

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讀者之友

《混凝土與水泥制品》“3D打印混凝土”與“節能利廢混凝土”專題征稿啟事

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論文推薦

再生混凝土配合比設計初探

張亞梅,秦鴻根,孫偉,郝東明,寧鐘

2002年第2期

摘要

引用本文

摘要:通過實驗研究探索了再生混凝土配合比設計的方法, 提出了在普通混凝土配合比設計的基礎上進行廢混凝土骨料的預吸水, 并通過摻加優質粉煤灰、減水劑或二者復合, 可成功地配制同時滿足工作性和強度要求的再生混凝土。根據這種方法 , 配制的全部使用廢混凝土骨料為粗骨料的再生混凝土28天的抗壓強度高達54.6MPa。 Abstract: The approach for the proportion design of recycled aggregate concrete is investigated according to the experimental study.It is suggested that the proportion of cement, sand and aggregate can be calculated based on the current proportion design code for ordinary concrete.As regard to the water content, the water adsorption of waste concrete aggregate within certain time period should also be considered and added to the water content calculated according to the code for ordinary concrete .In addition, the using of good quality fly ash and superplasticizer can improve the strength of recycled aggregate concrete.The highest compressive strength of the concrete, in which all aggregate is insteaded by waste concrete aggregate, is up to 54.6MPa at 28days.

高性能混凝土———綠色混凝土

吳中偉

2000年第2期

摘要

引用本文

提要：21世紀水泥混凝土面臨兩大問題:(1)可持續發展問題;(2)可知性問題。本文以前者為主并論述高性能混凝土技術的要點。

綠色高性能混凝土 ———混凝土的發展方向

吳中偉

1998年第1期

摘要

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摘要:本文從合理利用資源,保護人類賴于生存的自然環境不遭破壞并實現可持續發展的戰略高度出發,論述了混凝土目前及今后的發展方向,提出了發展“綠色高性能混凝土(GHPC)的觀點。 Abstract :In this paper the trend of concrete development at present and future has been espounded with a far -sighted strategy , that is reasonably utilizing the resource , protecting the natural environment , which human existance relies on , and realizing the sustainable development .And a point of view for developing Green High Performance Concrete has been put forward .

200~300MPa 活性粉末混凝土(RPC)的配制技術研究

何峰，黃政宇

2000年第4期

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摘要:試驗研究了原材料品種、性質及配合比對 RPC 強度的影響;在未摻鋼纖維的情況下, 配制出了流動性好, 高溫養護(200℃)下抗壓強度達 229.0MPa 的超高強混凝土, 在摻鋼纖維以及高溫養護的情況下 RPC 的抗壓強度高達 298.6MPa。 Abstract:ased on experiments , the effects of kinds , properties and proportioning of raw materials on the compressive strength of RPC was studied.As a result, ultra high-strength concrete with excellent fluidity and compressive strength up to 229.0MPa under high temperature curing (200℃)was prepared , while the compressive strength of RPC adding with steel fiber was up to 298.6MPa.

纖維增強—水泥基材料的未來

吳中偉

1999年第1期

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一、大宗建材必須是可持續發展的綠色材料水泥與水泥基材料是當今最大宗的人造材料。世界水泥年產量已超過 15 億噸 (我國 1997 年為 5.1 億噸 ,達世界產量的三分之一), 據此推算 ,水泥基材料總量在 60～ 70 億噸上下。估計所消耗的主要資源為優質石灰石 15億噸、砂石集料 40 億 m 3 , 排放的 CO 2(主要溫室氣體)12億噸以上 , 還有其他有害氣體與大量粉塵 ,嚴重污染環境。如今后幾年我國水泥年產量保持在 5億噸 , 按合理的指標估算 , 每年消耗的能源、資源與造成的環境負擔如表 1。可見不論全世界與我國 ,都必須依靠科技 ,大力節約能源資料 ,保護環境 ,否則水泥與水泥基材料將成為不可持續發展的材料。水泥基材料必須向高性能發展 , 向減少用量 , 延長壽命 , 增加功能 , 尤其降低環境代價的方向努力。

橡膠粉改性的高韌性混凝土研究

宋少民，劉娟紅，金樹新

1997年第1期

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摘要 : 本文探討了橡膠粉對混授土抗折、抗壓強度及抗沖擊性能的影響。研究結果表明橡膠粉改性混凝土的抗折、抗壓強度較基準混凝土變化不大 , 沖擊荷載則明顯提高。采用適當粘結劑可以改善橡膠粉與混授土的界面狀況 , 大幅度提高混凝土的抗沖擊性能。 Abstract: In this paper, the influence of rubber powder on flexural, compr回sive and impact strength of c。ncrete has been studied. The r田ults show that, in comparison with the control, there is lttle diifference to flexural and com pressive strength of the modifiied c。ncrete. H。wever, the impact property w出improved 。bviosly. Further more by using suitable adhesion agent, the interface state between rubber and conorete oan be improved, which greatly benefits the impact property of concrete.

再生混凝土集料的研究

王武祥，劉立，尚禮忠，王玲

2001年第4期

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摘要:再生集料作為廢棄混凝土的主要用途, 其性能及對混凝土的性能影響程度將決定廢棄混凝土的再生利用可能, 本文進行了這方面的探索性研究。

高性能減水劑的研究現狀與展望

李崇智，馮乃謙，李永德，覃維祖

2001年第2期

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摘要:本文概述了國內外高性能減水劑的主要性能及發展現狀, 介紹了高性能減水劑的種類與組成, 提出了有關高性能減水劑的研究內容及今后研究方向。 Abstract:In this paper, the main properties and the present development condition of the high performance water -reducing agent in the world have been summarized, then the composites of various type and something about the research contents and trends have been proposed.

混凝土滲透性與微觀結構關系的研究

李淑進 1, 趙鐵軍 2, 吳科如 1

2004年第2期

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摘要:根據混凝土的滲透性大小與其孔結構參數直接相關的觀點, 采用壓汞試驗測定了水化 60d的水泥漿體孔結構和孔分布情況, 并采用掃描電鏡研究了混凝土的微觀結構與形貌。結果表明, 水膠比對混凝土的總孔隙率和孔徑分布的影響都很大;摻入20%的粉煤灰的混凝土的累積孔隙體積率有所減少, 孔徑分布偏向于凝膠孔, 且其微觀結構均勻密實, Ca(OH)2 的晶粒含量較少?；炷廖⒂^結構的改善有效地降低了其滲透性。 Abstract:t is directed for correlationship between the permeability and the microstructure parameter of concrete.The porosity and diameter distribution of pores of 60d aged cement mortar are investigated by MIP, and the microstructure of concrete is observed by SEM.The results shows that the water cement ratio largely effects the total pore volume and the diameter distribution and, when added with fly ash by weight of 20%cement content, the total pore volume is decreased.

超高性能混凝土（UHPC）的配制及應用探究

李鋒，孔文藝，羅健，范曉玲，劉思昊

2019年第7期

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摘 ? 要：選用合適的摻合料，采用正交法和最緊密堆積理論進行了超高性能混凝土（UHPC）基體的配合比實驗，通過對力學性能檢測，確定了UHPC基體的最優配合比，并在此基礎上探究了鋼纖維的摻量和摻入方式對UHPC性能的影響。試驗結果表明，選用合適的摻合料，通過合適的配合比試驗設計能配制出適于應用的UHPC。 Abstract:The mix proportion experiment of ultra high performance concrete without steel fibre was done by using right admixtures as reactive powder, orthogonal experiment and the closest packing experiment as methods. The optimal mix proportion of the ultra high performance concrete without steel fibre was obtained by testing the mechanical properties. And the influence of the incorporation method and the content of steel fiber on the performance of the ultra high performance concrete was studied. The results show that UHPC can also be obtained by using right admixtures and proper mix proportion design.

李鋒,孔文藝,羅健,等.超高性能混凝土(UHPC)的配制及應用探究[J].混凝土與水泥制品,2019(7):26-29. LI F,KONG W Y,LUO J,et al.Discussion on Preparation and Application of Ultra High Performance Concrete (UHPC)[J].China Concrete and Cement Products,2019(7):26-29.

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