摘 ? 要：研究了不同成型方式和水灰比對植生混凝土性能的影響。結果表明：振動成型的植生混凝土的連續孔隙率最小，插搗成型的植生混凝土的抗壓強度最高，壓搗成型的植生混凝土的連續孔隙率和抗壓強度均滿足相關設計要求；植生混凝土的抗壓強度隨著水灰比的增大而降低，連續孔隙率隨著水灰比的增大而增大；當水灰比為0.27時，采用壓搗成型方式制備得到的植生混凝土的性能滿足相關設計要求，并已成功應用于濟南趙莊險工48#壩壩坡防護工程。
Abstract: The effects of different forming methods and water-cement ratio on the properties of planting concrete were studied. The results show that the porosity of the planting concrete based on vibration molding is the smallest, the compressive strength of the planting concrete based on plug tamping is the highest, and the porosity and compressive strength of the planting concrete based on pressure tamping meet the relevant design requirements. The compressive strength of planting concrete decreases with the increase of water-cement ratio, and the porosity increases with the increase of water-cement ratio. When the water-cement ratio is 0.27, the performance of planting concrete prepared by pressure tamping method meets the relevant design requirements, and has been successfully applied to the dam slope protection project of Zhaozhuang dangerous engineering 48# dam in Jinan.
DONG Q W,JIA W W,XIE H D.Study on Performance of Planting Concrete and Its Application in Dam Slope Protection Engineering[J].China Concrete and Cement Products,2021(11):94-98.
摘 ? 要：研究了礦渣、粉煤灰以及熱等離子技術處理城市垃圾后的熔融殘渣（MWTPT）替代10%的水泥對泡沫混凝土性能的影響，并通過XRD、水化熱和SEM方法分析了MWTPT的作用機理。結果表明：MWTPT可以作為礦物摻合料替代水泥制備泡沫混凝土；摻MWTPT泡沫混凝土的抗壓強度在后期優于摻粉煤灰的泡沫混凝土，抗折強度在早期優于摻礦渣泡沫混凝土和摻粉煤灰泡沫混凝土；與摻粉煤灰泡沫混凝土相比，摻MWTPT泡沫混凝土的7 d、15 d抗折強度分別提高了19.1%、31.8%。
Abstract: The effects of slag, fly ash and the municipal waste residues after treated by thermal plasma technology(MWTPT) replacing 10% cement on the performance of foamed concrete were studied, and the mechanism of MWTPT was analyzed by XRD, hydration heat and SEM. The results show that MWTPT can be used as mineral admixture instead of cement to prepare foamed concrete. The compressive strength of the foamed concrete with MWTPT is better than that of the foamed concrete with fly ash in the later stage, and the flexural strength is better than that of the foamed concrete with slag and the foamed concrete with fly ash in the early stage. The 7 d and 15 d flexural strength of the foamed concrete with MWTPT are 19.1% and 31.8% higher than those of the foamed concrete with fly ash respectively.
LI Q J,OUYANG D,ZHAO Q,et al.Influence of the Municipal Waste Residues on the Properties of Foamed Concrete[J].China Concrete and Cement Products,2021(11):90-93.
摘 ? 要：以鋁酸鹽水泥為主要膠凝材料，摻入脫硫石膏漿液和普通硅酸鹽水泥，制備了地面用水泥基自流平砂漿，通過宏觀性能測試（強度、耐磨性和尺寸變化率）和XRD分析，研究了脫硫石膏漿液對水泥基自流平砂漿性能的影響。結果表明：當鋁酸鹽水泥摻量為30.3%～36.9%、脫硫石膏漿液摻量為18%～28%、普通硅酸鹽水泥摻量為5.3%～6.0%、河砂摻量為35%～39%時，制備的水泥基自流平砂漿具有強度高、耐磨性好和收縮率低的特點；脫硫石膏漿液能促進基體中早期AFt的生成，保證后期AFt的生成量，從而提高脫硫石膏漿液水泥基自流平砂漿的強度。
Abstract： The cement-based self-leveling mortar for ground was prepared by using aluminate cement as main cementitious material, adding desulfurization gypsum slurry and ordinary portland cement. The influence of desulfurization gypsum slurry on the properties of cement-based self-leveling mortar was studied by macro performance tests (strength, wear resistance and dimensional change rate) and XRD analysis. The results show that the cement-based self-leveling mortar has the characteristics of high strength, good wear resistance and low shrinkage when the content of aluminate cement is 30.3%～36.9%, the content of desulfurization gypsum slurry is 18%～28%, the content of ordinary portland cement is 5.3%~6.0%, and the content of river sand is 35%～39%. The desulfurized gypsum slurry can promote the formation of early AFt in the matrix and ensure the generation of AFt in the later period, thereby improving the strength of the cement-based self-leveling mortar of the desulfurized gypsum slurry.
XU Feng-guang, YANG Feng-ling, HOU Hai-jun,et al.Rescarch on Application of Preparation of High Strength Cement-based Self-leveling Mortar with Desulfurization Gypsum Slurry[J].China Concrete and Cement Products,2021(11):85-89.
摘 ? 要：研究了鋼渣微粉替代石英粉對超高性能混凝土(UHPC)性能的影響。結果表明：水膠比分別為0.18、0.19的UHPC試件的28 d抗壓強度均在120 MPa以上，且水膠比為0.19的UHPC的工作性更好，流動度為195 mm；鋼渣微粉替代石英粉對UHPC試件的抗壓強度無明顯影響；在鋼渣微粉摻量為100%的情況下，控制水膠比為0.20、水灰比為0.35、膠砂比為1.63時，可配制28 d抗壓強度為147.5 MPa的UHPC。
Abstract: The effect of steel slag powder instead of quartz powder on the properties of ultra-high performance concrete (UHPC) was studied. The results show that the 28 d compressive strength of UHPC specimens with water-binder ratio of 0.18 and 0.19 is more than 120 MPa, and the workability of UHPC with water-binder ratio of 0.19 is better and the fluidity is 195 mm. The substitution of steel slag powder for quartz powder has no obvious effect on the compressive strength of UHPC specimens. When the content of steel slag powder is 100%, the water-binder ratio is 0.20, the water-cement ratio is 0.35 and the binder-sand ratio is 1.63, and the 28 d compressive strength of UHPC can reach 147.5 MPa.
TANG X y,GUO B,MA J l,et al.Effect of Steel Slag Powder on the Properties of Ultra-high Performance Concrete (UHPC)[J].China Concrete and Cement Products,2021(11):82-84,89.
摘 ? 要：利用廢舊輪胎破碎后的橡膠顆粒替代部分河砂制備了泡沫混凝土，研究了橡膠顆粒摻量、水灰比對混凝土的密度、流動性、抗壓強度、劈裂抗拉強度、彈性模量和耐高溫性能的影響。結果表明：橡膠顆粒的摻入降低了混凝土的密度、坍落度、抗壓強度和彈性模量，但當橡膠顆粒摻量為20％時，試件的抗壓強度仍高于10 MPa；試件的劈裂抗拉強度隨著橡膠顆粒摻量的增加呈先增后減的趨勢，且當橡膠顆粒摻量為20%時強度達到最大；高溫對試件的抗壓強度不利，與常溫相比，經過100 ℃、200 ℃高溫處理后，試件的抗壓強度分別降低了3.1%~33.0%、25.0%~55.0%。
Abstract: The foamed concrete was prepared by replacing part of river sand with the crushed rubber particles of waste tires. The effects of rubber particle content and water-cement ratio on the density, fluidity, compressive strength, splitting tensile strength, elastic modulus and high temperature resistance of concrete were studied. The results show that the addition of rubber particle reduces the density, slump, compressive strength and elastic modulus of the concrete, but when the rubber particle content is 20%, the compressive strength of the specimen is still higher than 10 MPa. The splitting tensile strength of the specimen first increases and then decreases with the increase of rubber particle content, and reaches the maximum when the rubber particle content is 20%. High temperature is unfavorable to the compressive strength of the specimen. Compared with normal temperature, the compressive strength of the specimen is reduced by 3.1%~33.0% and 25.0%~55.0% after high temperature treatment at 100 ℃ and 200 ℃.
摘 ? 要：針對長3.9 m、寬2.5 m的預應力平面桁架鋼筋混凝土疊合板底板以及常規鋼筋桁架混凝土疊合板底板的受力性能進行了數值模擬，分析了兩種疊合板底板在承載力和變形方面的差別。結果表明：預應力平面桁架鋼筋混凝土疊合板底板具有很好的承載性能，其充分利用了桁架鋼筋腹桿對疊合板受力貢獻小的特點，在減少一半腹桿用量的條件下可以發揮與常規鋼筋桁架混凝土疊合板底板相近的抗彎性能，在減輕自重的同時，體現出良好的經濟性。
Abstract: Numerical simulations were carried out on the mechanical performance of the concrete composite bottom slab with prestressed plane steel bar trusses with the length of 3.9 m and the width of 2.5 m, as well as the conventional concrete composite bottom slab with steel bar trusses, and the differences in the bearing capacity and deformation of the two types of concrete composite bottom slab were analyzed. The results show that the concrete composite bottom slab with prestressed plane steel bar trusses has good load-bearing performance, and it makes full use of the feature that the web bar has little influence on the bending performance of the slab, and it can provide the bending performance similar with the conventional concrete composite bottom slab with steel bar trusses under the condition of reducing the half number of webs, which reduces its own weight and reflects good economic efficiency.
XU S,MENG F L,LI S Y,et al.Performance Analysis of Concrete Composite Bottom Slab with Prestressed Plane Steel Bar Trusses[J].China Concrete and Cement Products,2021(11):73-76.
摘 ? 要：為了實現抗震性能好且材料節能的結構體系，針對多層辦公樓案例，按照我國相關規范設計成鋼筋混凝土框架結構和框架薄殼結構，通過彈塑性動力時程分析比較了兩種結構體系的抗震性能、材料用量和CO2排放量。結果表明：兩種結構體系都能滿足“三水準”抗震設防目標；框架結構的最大樓層位移和最大層間位移角比框架薄殼結構大，罕遇地震下框架結構的損傷比框架薄殼結構嚴重；框架薄殼結構的混凝土、鋼筋用量和CO2排放量相比框架結構分別減少了 1 167.7 t、35.1 t和220 t；框架薄殼結構的抗震性能和節能減排性能明顯優于框架結構。
Abstract: In order to achieve a structural system with good seismic performance and materials saving, for the case of a multi-storey office building, a reinforced concrete frame structure and a frame shell structure were designed in accordance with Chinese relevant codes. The seismic performance, material consumption and CO2 emission of the two structural systems were compared through elasticplastic dynamic time history analysis. The results show that the two structural systems can meet the "three-level" seismic fortification goal. The maximum floor displacement and maximum interstory displacement angle of the frame structure are larger than those of the frame shell structure, and the damage of frame structure under rare earthquake is more serious than that of frame shell structure. Compared with the frame structure, the amount of concrete, steel bars and CO2 emission of the frame shell structure are reduced by 1 167.7 t, 35.1 t and 220 t respectively. The seismic performance, energy saving and emission reduction performance of frame shell structure are obviously better than those of frame structure.
YANG X W,WANG H M.Research on Seismic Performance and CO2 Emissions of Reinforced Concrete Frame Structure and Frame Shell Structure[J].China Concrete and Cement Products,2021(11):68-72.
摘 ? 要：研究了絲狀、桿狀稻草纖維分別與粉煤灰復摻對混凝土力學性能的影響。結果表明：隨著稻草纖維和粉煤灰摻量的增加，混凝土的抗壓強度、劈裂抗拉強度和抗折強度總體呈下降趨勢，但稻草纖維能夠有效改善混凝土的脆性破壞形態；絲狀稻草纖維對混凝土性能的不利影響小于桿狀稻草纖維；當絲狀稻草纖維摻量為0.3%、粉煤灰摻量為20%時，混凝土的抗壓強度較高；當絲狀稻草纖維摻量為0.3%、粉煤灰摻量為10%時，混凝土的劈裂抗拉強度較高；當絲狀稻草纖維摻量為0.3%、粉煤灰摻量為20%時，混凝土的抗折強度較高。
Abstract: The effects of filamentary straw fiber and rod-shaped straw fiber and fly ash on mechanical properties of concrete were studied. The results show that the compressive strength, splitting tensile strength and flexural strength of concrete generally decrease with the increase of straw fiber content and fly ash content, but straw fiber can effectively improve the brittle damage pattern of concrete. The adverse effect of filamentous straw fiber on the performance of concrete is less than that of rod-shaped straw fiber. The compressive strength of the concrete is higher when the filamentary straw fiber content is 0.3% and the fly ash content is 20%. The splitting tensile strength of the concrete is higher when the filamentary straw fiber content is 0.3% and the fly ash content is 10%. The flexural strength of the concrete is higher when the filamentary straw fiber content is 0.3% and the fly ash content is 20%.
LIU T,ZHAO M H,NIE G H.Study on the Mechanical Properties of Fly Ash and Straw Fiber Composite Concrete[J].China Concrete and Cement Products,2021(11):64-67,72.
摘 ? 要：通過21根碳纖維增強復合材料（CFRP）編織管約束混凝土短柱的準靜態軸壓試驗，研究了CFRP層數、水灰比、試件長徑比對混凝土短柱抗壓強度和變形性能的影響。結果表明：CFRP編織管約束試件的承載力相比素混凝土試件至少提高了10%；水灰比在一定范圍內變化時，對試驗結果的影響不大；試件長徑比越小，CFRP對最大荷載的提升作用越明顯。
Abstract: Through the quasi-static axial compression tests of concrete short columns confined by 21 carbon fiber reinforced composite material(CFRP) braided tubes, the effects of the number of CFRP layer, water-cement ratio, and length-diameter ratio of specimen on the compressive strength and deformation characteristics of concrete short columns were studied. The results show that the bearing capacity of the CFRP tube confined column is at least 10% higher than that of the plain concrete column. The water-cement ratio has little effect on the test results within a certain range. The smaller the length-diameter ratio of the column, the more obvious the increase in the maximum load by CFRP.
ZHANG H L,WANG W H,XU Y,et al.Experimental Study on the Axial Compression Performance of Concrete Short Columns Confined by CFRP Braided Tubes[J].China Concrete and Cement Products,2021(11):59-63.