第八期_2019_《混凝土與水泥制品》雜志社

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第八期

水灰比調控橡膠砂漿力學及收縮性能試驗研究

吳帆，馬海彬，任翔，董大鵬

２０19年第8期

摘要

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摘要：為綜合評價水灰比對橡膠砂漿性能的調控特性，以橡膠等體積替代40%砂，研究不同水灰比對橡膠砂漿力學和收縮性能的影響。研究表明，隨著水灰比的減小，橡膠砂漿各齡期的抗壓、抗折強度均呈現逐漸提高的趨勢；橡膠砂漿的早期收縮特性較為顯著，且隨著水灰比的減小，橡膠砂漿的自收縮及干縮幅度均呈逐漸提升的趨勢。 Abstract: In order to comprehensively evaluate the control characteristics of W/C on the properties of rubber mortar, the effects of different W/C on the mechanical and shrinkage properties of rubber mortar were studied. Among them, rubber was replaced by 40% sand by equal volume. The results show that with the decrease of W/C, the compressive strength and flexural strength of rubber mortar at all ages increase gradually; the early shrinkage characteristics of rubber mortar are more significant, and with the decrease of W/C, the self-shrinkage and dry shrinkage of rubber mortar show a gradual increase trend.

吳帆,馬海彬,任翔,等.水灰比調控橡膠砂漿力學及收縮性能試驗研究[J].混凝土與水泥制品,2019(8):97-100. WU F,MA H B,REN X,et al.Experimental Research on Mechanical Properties and Shrinkage Performance of Rubber Mortar Controlled by W/C[J].China Concrete and Cement Products,2019(8):97-100.

高延性鐵尾礦砂再生混凝土力學性能試驗研究

魏濤1，全曉旖1，閆強強1，王純軒2

２０19年第8期

摘要

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摘要：為了研究鐵尾礦砂對高延性再生混凝土力學性能的影響，對12組108個再生粗骨料替代率為30%和50%的鐵尾礦砂高延性再生混凝土進行試驗研究，分析了不同鐵尾礦砂摻量對再生混凝土抗壓強度、劈裂抗拉強度和抗折強度的影響。結果表明，再生混凝土中摻入定量的PVA纖維后，再生粗骨料替代率為30%和50%的兩種再生混凝土的力學性能隨著鐵尾礦砂摻量的增加均呈現先增長后下降的趨勢，其抗壓強度、劈裂抗拉強度及抗折強度基本呈正相關，并在鐵尾礦砂摻量30%時達到峰值；當鐵尾礦砂摻量相同時，再生骨料替代率越大其抗壓強度越??；摻30%鐵尾礦砂、再生骨料替代率30%的再生混凝土劈裂抗拉強度達到最大值；鐵尾礦砂摻量30%時，再生骨料替代率30%和50%再生混凝土的抗折強度近似呈線性減小。 Abstract: In order to study the effect of iron tailings on the mechanical properties of high ductility recycled concrete, 108 recycled high ductility recycled concrete with 30% and 50% recycled coarse aggregate in 12 groups were tested and studied. The influence of different amount of iron tailings on compressive strength, splitting tensile strength and flexural strength of recycled concrete was analyzed. The results show that the mechanical properties of recycled concrete with recycled coarse aggregate replacement rate of 30% and 50% increase first and then decrease with the increase of iron tailings sand content. The compressive strength, splitting tensile strength and flexural strength of recycled concrete are positively correlated, and reach the peak at 30% iron tailings sand content. When the amount of recycled aggregate is equal, the greater the replacement rate of recycled aggregate, the smaller the compressive strength， and when the content of iron tailing sand is 30%, the splitting tensile strength of recycled concrete with 30% replacement ratio of recycled aggregate reaches the peak. When iron tailings sand content is 30%, the flexural strength of recycled concrete with recycled aggregate replacement rate of 30% and 50% decreases approximately linearly.

魏濤,全曉旖,閆強強,等.高延性鐵尾礦砂再生混凝土力學性能試驗研究[J].混凝土與水泥制品,2019(8):93-96. WEI T,QUAN X Y,YAN Q Q,et al.Experimental Study on Mechanical Performance of Ductile Iron Tailings RAC[J].China Concrete and Cement Products,2019(8):93-96.

高速鐵路UHPC試驗箱梁的設計與施工研究

劉琛

２０19年第8期

摘要

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摘要：國內高速鐵路32 m簡支箱梁均采用整孔運輸、架設施工，簡支梁向更大跨度發展需解決梁重增加這一主要矛盾。超高性能混凝土（UHPC）材料是一種新型纖維增強水泥基復合材料，用其建造橋梁可以減小結構尺寸。為實現鐵路大跨度簡支梁整孔運架技術，對24 m UHPC簡支箱梁的主要構造進行了設計計算，并結合24 m UHPC試驗梁的制作提出了主要施工工藝要求。結果表明，高速鐵路UHPC簡支箱梁理論計算可行，可推廣至更大跨度簡支梁的建造實踐；結合結構受力要求宜選用水膠比較高的UHPC材料；UHPC箱梁的模板應設計為內?？缮炜s體系以適應材料收縮變形較大的特點。UHPC節段蒸養應嚴格按照升溫、恒溫、降溫三個階段蒸養。 Abstract: 32 m simply supported beam integrally prefabricated and erected for High-Speed railway is very popular. The main contradiction of increasing beam weight should be solved in the development of simply supported beams to larger span. Ultra-high Performance Concrete(UHPC) is a new fiber enhancement cement-based composite materials. The size of the structure can be more slender by using UHPC. In order to realize the whole-hole transportation and erection technology of railway long-span simple-supported beam, the main structure of 24 m UHPC simple-supported box girder is designed and calculated. Combined with the manufacture of 24 m UHPC test beam, the main construction technology requirements are put forward. The results show that the theoretical calculation of UHPC simple-supported box girder for high-speed railway is feasible and can be extended to the construction practice of large-span simple-supported girder; UHPC material with high water-cement ratio should be selected in combination with structural stress requirements; the formwork of UHPC box girder should be designed as an internal modular retractable system to adapt to the characteristics of material shrinkage and deformation. Steaming of UHPC segments should be strictly carried out in three stages: heating, constant temperature and cooling.

劉琛.高速鐵路UHPC試驗箱梁的設計與施工研究[J].混凝土與水泥制品,2019(8):89-92. LIU C.Design and Construction Research of UHPC Test Box Girders for Highspeed Railway[J].China Concrete and Cement Products,2019(8):89-92.（1）對高速鐵路24 m UHPC簡支試驗箱梁的理論分析表明，其各項技術指標均滿足規范要求，且梁重較輕，說明該材料可應用于更大跨度的鐵路簡支梁實際工程。　?。?）UHPC材料的水膠比低、工作性較差，在滿足結構受力要求的前提下，為提高UHPC材料的工作性，宜降低UHPC材料的強度，以提高箱形斷面橋梁倒角位置的澆筑質量。（3）UHPC箱梁的模板應設計為內?？缮炜s體系，在蒸養期間對內模定位進行調整以適應UHPC材料收縮變形較大的特征。　?。?）對UHPC箱梁節段進行蒸養時，應嚴格按照升溫、恒溫、降溫三個階段進行養護。升溫速度不應大于12 ℃/h；降溫速度不應大于15 ℃/h；恒溫溫度應控制在70 ℃±5 ℃，恒溫養護時間為96 h。

透水混凝土路面質量問題原因分析與防控對策

姜騫

２０19年第8期

摘要

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摘要：通過現場調研和重復試驗比對，分析了北方某城市透水混凝土路面質量問題原因并提出了相應對策。結果表明，路基土質不良和墊層處理不當是引起該工程透水路面開裂、脫空的主要原因，雨季大量雨水對路基的沖刷以及窨井的約束作用進一步加劇了破壞的發生；經驗證，透水混凝土原材料與配合比能夠滿足C30設計強度要求，但透水混凝土干燥收縮高于普通混凝土。解決水泥透水混凝土路面的質量問題需要從設計-材料-施工等多角度統籌考量，并在路基、墊層處理和接縫、井蓋周邊等薄弱環節加強施工，減少透水路面破壞的發生。 Abstract: Based on site investigation and reproducible experiments, The causes of the quality issues of permeable concrete pavement in a North-China city were analyzed and countermeasures were put forwoard. The results show that poor soil quality and improper treatment of cushion are the main causes of the cracking and void of permeable concrete pavement. During the rainy season, the erosion of the roadbed and the restraint of inspection wells further aggravate the damage. According to the experiment results, the raw material and mix ratio of permeable concrete can meet the design strength requirements of C30, but the dry shrinkage of permeable concrete is higher than that of ordinary concrete. In order to solve the quality issues of permeable concrete pavement, solving the quality issues of permeable concrete pavement needs to be considered from the perspectives of design, materials and construction.And strengthen the construction in the weak links such as subgrade, cushion treatment and joint, and around manhole covers to reduce the damage of the permeable concrete pavement.

姜騫.透水混凝土路面質量問題原因分析與防控對策[J].混凝土與水泥制品,2019(8):85-88. JIANG Q.Cause Analysis and Countermeasures for Quality Issues of Permeable Concrete Pavement[J].China Concrete and Cement Products,2019(8):85-88.

預制混凝土箱涵模具研究與應用

劉錦濤

２０19年第8期

摘要

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摘要：以歐洲與日本的先進模具制造技術為基礎，通過調查和比較國內外現有的模具結構和技術規格，基于解預制廠當前預制混凝土箱涵模具產品的使用情況，經過不斷改進完善，研發了一款精度、穩定性及效率相對較好的預制混凝土箱涵模具。本文介紹了該款模具的主要結構特點，創新點及關鍵技術指標。 Abstract: Based on the advanced mould manufacturing technology in Europe and Japan, the existing mould structures and technical specifications at home and abroad were investigated and compared by the current use of prefabricated concrete box culvert mould products in prefabrication factories. Through continuous improvement and improvement, a high precision, high stability and high efficiency prefabricated concrete box culvert mould was developed. The main structure characteristics, innovation points and key technical indicators of the mould are introduced.

劉錦濤.預制混凝土箱涵模具研究與應用[J].混凝土與水泥制品,2019(8):83-84. LIU J T.Research and Application of Prefabricated Concrete Box Culvert Mould[J].China Concrete and Cement Products,2019(8):83-84.

長英巖蒸壓加氣混凝土的主要性能研究

王賀月，蔡基偉，趙慧，李汶晉，賈翔宇，劉新陽

２０19年第8期

摘要

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摘要：利用長英巖類石粉代替粉煤灰制備蒸壓加氣混凝土，研究了蒸壓養護溫度和鋁粉摻量對加氣混凝土強度、干表觀密度及吸水性等性能的影響。試驗結果表明，當鋁粉為最佳摻量時，試塊強度達到3.6 MPa，干表觀密度為620 kg/m3，符合蒸壓加氣混凝土B06級要求，完全可以用長英巖類石粉代替粉煤灰生產蒸壓加氣混凝土。在蒸壓養護過程中，長英巖中石英和長石均不同程度地參與了水熱反應。 Abstract: Autoclaved aerated concrete samples were prepared with felsite powder instead of fly ash. The effects of autoclaved curing temperature and aluminum powder dosage on the strength, dry apparent density and water absorption of aerated concrete were studied. The results show that when aluminum powder doses in optimal value, the strength reaches 3.6 MPa, and the dry apparent density is 620 kg/m3. The properties can meet the requirement of standard for autoclaved aerated concrete product grade B06. Felsite powder can be completely substituted for fly ash in production of autoclaved aerated concrete. In autoclaved curing, both quartz and feldspar inside felsite powder take part in hydrothermal reaction to some extent.

王賀月,蔡基偉,趙慧,等.長英巖蒸壓加氣混凝土的主要性能研究[J].混凝土與水泥制品,2019(8):80-82. WANG H Y,CAI J W,ZHAO H,et al.Study on Properties of Autoclaved Aerated Concrete with Felsite[J].China Concrete and Cement Products,2019(8):80-82.

裝配式建筑主要存在的問題與對策研究

戴大力

２０19年第8期

摘要

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摘要：分析了裝配式建筑的優越性，同時，也提出了裝配式建筑可能出現的一些問題，并在此基礎上給出相應的對策，以求對裝配式建筑模式有一個更清楚地認識，為裝配式建筑的健康發展提供參考。 Abstract: The advantage of assembly building is analyzed to understand the construction model of assembly building. Some possible problem are put forward, and the appropriate countermeasures are put forward to promote the development of assembly building, which can provide a refenence for the development of the assembly building.

戴大力.裝配式建筑主要存在的問題與對策研究[J].混凝土與水泥制品,2019(8):77-79. DAI D L.Research on Problems and Countermeasures of Assembly Buildings[J].China Concrete and Cement Products,2019(8):77-79.

聯肢剪力墻結構連梁的抗震試驗研究

鄭娟

２０19年第8期

摘要

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摘要：為研究雙肢剪力墻結構大剪跨比（μ≥2.5）鋼筋混凝土耗能連梁的力學性能。設計了3個剪跨比為3.0的鋼筋混凝土連梁構件，其中2個為普通混凝土連梁，1個為設置消能裝置的連梁，通過低周往復加載試驗，對比分析了裂縫發展、連梁轉角、荷載-位移曲線、骨架曲線、構件剛度以及耗能能力。分析結果表明，采用金屬耗能裝置的鋼筋混凝土連梁可以有效降低連梁自身混凝土段和墻肢的損傷，主要變形集中在金屬耗能裝置中，可以很好地實現震后構件的快速更換，帶阻尼器連梁沒有出現普通連梁承載力超強的問題。 Abstract: In order to study the mechanical properties of double shear wall structure with large shear-span ratio, three reinforced concrete beam connectors with a shear to span ratio of 3.0 were designed, and two of them were ordinary concrete beams and one was a beam with an energy dissipation device. Through low-cycle reciprocating loading test, the crack development, beam Angle, load-displacement curve, skeleton curve, component stiffness and energy dissipation capacity were compared and analyzed. The analysis results show that the reinforced concrete beam with metal energy dissipation device can effectively reduce the damage of the concrete section and the wall limb of the beam itself, and the main deformation is concentrated in the metal energy dissipation device, which can well realize the rapid replacement of the components after the earthquake, and there is no problem of super bearing capacity of ordinary connecting beams with dampers.

鄭娟.聯肢剪力墻結構連梁的抗震試驗研究[J].混凝土與水泥制品,2019(8):72-76. ZHENG J.Experimental Study on Seismic Behavior of Joint Beam with Double Shear Wall Structure[J].China Concrete and Cement Products,2019(8):72-76.

低周反復荷載下PSRC梁的抗剪性能

孟浩

２０19年第8期

摘要

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摘要：通過對4根低周反復荷載作用下的PSRC梁和1根單調加載的PSRC梁的對比試驗，研究了剪跨比、加載方式及現澆混凝土強度對PSRC梁裂縫發展、破壞形態及受剪承載力的影響，并在JGJ 138—2016《組合結構設計規范》基礎上建立了適用于PSRC梁斜截面受剪承載力公式。研究結果表明：反復荷載作用下PSRC梁的斜截面受剪承載力比單調加載低，且循環次數越多，受剪承載力降低越多；剪跨比為2試件的極限承載力和斜截面受剪承載力比剪跨比為1的試件低；現澆混凝土強度等級對正向加載時的受剪承載力有一定影響。 Abstract: The contrast tests of four PSRC beams under low cyclic loading and one PSRC beam under monotonic loading were carried out. The influence of shear-span ratio, loading method and concrete strength in the cast-in-place area on crack development, failure forms and shear bearing capacity was studied. Based on the code for design of composite structures, a formula for shear capacity of PSRC beams with inclined section was established. The test results show that the shear capacity of PSRC beams with inclined section under low cyclic loading is lower than that under monotonic loading, and the more cycle number, the more decreased degree of shear capacity. The ultimate bearing capacity and shear bearing capacity of the specimens with 2 shear-span ratio are lower than one shear-span ratio. The strength grade of cast-in-place concrete has a certain influence on the shear capacity under forward loading.

孟浩.低周反復荷載下PSRC梁的抗剪性能[J].混凝土與水泥制品,2019(8):67-71. MENG H.Shear Behavior of PSRC Beams under Low Cyclic Loads[J].China Concrete and Cement Products,2019(8):67-71.

鋼板-混凝土組合加固梁的抗彎性能數值分析研究

王瑞1，鄒昀2，謝夢潔2，周虹2，丁杰2

２０19年第8期

摘要

引用本文

摘要：為了研究鋼板-混凝土組合加固梁（SPSS）的抗彎性能，利用ABAQUS有限元軟件分別對傳統鋼筋混凝土（RC）梁和不同型式的鋼板-混凝土組合加固梁進行非線性數值模擬，對比分析了梁的荷載-位移曲線、破壞狀態、承載能力以及剛度退化曲線。結果表明：鋼側板可以有效分擔梁所受剪力，延緩鋼筋的屈服及混凝土斜裂縫的開展；采用U型鋼板和增厚混凝土層的組合加固方式對梁承載能力的提升最為顯著；鋼板-混凝土組合加固方法可有效提升梁的初始剛度，延緩其剛度退化速率，提升塑性變形能力。 Abstract: In order to research the flexural behavior of different steel-concrete composite reinforced beams, by using ABAQUS finite element program, the nonlinear numerical simulation of traditional reinforced concrete (RC) beams and steel-plated shear strengthening (SPSS) beams with different combinations were performed respectively. The load-displacement curves, failure states, capacity and stiffness degradation of beams with different sections are compared and analyzed. The analysis results indicate that the steel plate can effectively share force of beam and delay the yield of reinforcement and the development of inclined crack of concrete. The combined reinforcement of U-shaped steel plate and thickened concrete layer is the most significant in enhancing the bearing capacity of the beam. SPSS reinforcement can effectively enhance the initial stiffness of the beam, delay its stiffness degradation rate, and enhance the plastic deformation capacity.

王瑞,鄒昀,謝夢潔,等.鋼板-混凝土組合加固梁的抗彎性能數值分析研究[J].混凝土與水泥制品,2019(8):63-66. WANG R,ZOU Y,XIE M J,et al.Numerical Research on Flexural Behavior of Steel-concrete Composite Reinforced Beams[J].China Concrete and Cement Products,2019(8):63-66.

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