第五期_2023_《混凝土与水泥制品》杂志社

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发布时间：2020-01-06 00:00:00

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第五期

等强度条件下碱激发高炉镍渣混凝土与普通硅酸盐水泥混凝土的性能对比

李彦贺1，贺茂军1，周能源1，杨峻2，王登权2

2023年第5期

摘要

引用本文

摘要：分别以NaOH和水玻璃为激发剂，制备了碱激发高炉镍渣混凝土，在碱激发高炉镍渣混凝土的7 d抗压强度与普通硅酸盐水泥混凝土的28 d抗压强度基本相等的条件下，对比了碱激发高炉镍渣混凝土和普通硅酸盐水泥混凝土的后期（90 d）力学性能、孔结构发展规律和抗氯离子渗透性能的差异。结果表明：碱激发高炉镍渣混凝土的早期（7 d前）强度发展迅速，其中，NaOH激发高炉镍渣混凝土28 d后的强度发展相对缓慢；等强度条件下，碱激发高炉镍渣混凝土的后期抗压强度和劈裂抗拉强度、孔结构和抗氯离子渗透性能均优于普通硅酸盐水泥混凝土，其中，水玻璃激发高炉镍渣混凝土的各项性能最好。 Abstract: Alkali-activated blast furnace nickel slag concrete was prepared using NaOH and water glass as activator. Under the condition that the 7 days compressive strength of alkali-activated blast furnace nickel slag concrete was basically equal to the 28 days compressive strength of ordinary Portland cement concrete, the differences in mechanical properties, pore structure development rules, and chloride ion penetration resistance between alkali-activated blast furnace nickel slag concrete and ordinary Portland cement concrete at the later stage (90 days) were compared. The results show that the early(before 7 days) strength of the alkali-activated blast furnace nickel slag concrete develops rapidly, and the strength of the NaOH activated blast furnace nickel slag concrete develops relatively slowly after 28 days. Under equal strength conditions, alkali-activated blast furnace nickel slag concrete has better compressive and splitting tensile strength, pore structure, and chloride ion penetration resistance than those of ordinary Portland cement concrete, among which water glass activated blast furnace nickel slag concrete has the best performance.

李彦贺,贺茂军,周能源,等.等强度条件下碱激发高炉镍渣混凝土与普通硅酸盐水泥混凝土的性能对比[J].混凝土与水泥制品,2023(5):79-82. LI Y H,HE M J,ZHOU N Y,et al.Performance Comparison of Alkali-Activated Blast Furnace Nickel Slag Concrete and Ordinary Portland Cement Concrete Under Equal Strength Conditions[J].China Concrete and Cement Product,2023(5):79-82.

锂渣粉和磷渣粉对再生混凝土力学及耐久性能的影响

赵俭斌1，赵港1，杜松岩1，李志军1，张延年1，王震2

2023年第5期

摘要

引用本文

摘要：研究了不同掺量的锂渣粉和磷渣粉分别单掺和复掺对再生混凝土抗压强度和抗氯离子渗透性能的影响。结果表明：与空白组试件相比，单掺锂渣粉或磷渣粉试件的7 d、14 d和28 d抗压强度变化幅度最高不超过7.7%；与锂渣粉和磷渣粉分别单掺相比，二者复掺对再生混凝土的7 d抗压强度影响不大，但明显提高了14 d、28 d抗压强度；单掺和复掺锂渣粉和磷渣粉试件的抗氯离子渗透性能均较空白组试件好，其中，复掺锂渣粉和磷渣粉试件的抗氯离子渗透性能介于单掺锂渣粉试件和单掺磷渣粉试件之间，单掺锂渣粉试件的抗氯离子渗透性能最好；再生混凝土中的氯离子在环境氯离子浓度较低时以物理吸附和化学结合为主，而在环境氯离子浓度较高时以化学结合为主；氯离子总结合能力随着环境氯离子浓度的增加而下降；复掺20%锂渣粉与10%磷渣粉试件的氯离子总结合能力相对最好。 Abstract: The effects of different amounts of lithium slag powder and phosphorus slag powder on the compressive strength and resistance to chloride ion penetration of recycled concrete were studied. The results show that, compared with the blank group, the compressive strength of the specimens mixed with lithium slag powder or phosphorus slag powder at 7 d, 14 d and 28 d has the highest change range of not more than 7.7%. Compared with single addition of lithium slag powder or phosphorus slag powder, their combination has little effect on the 7 d compressive strength of recycled concrete, but significantly improves the 14 d and 28 d compressive strength. The resistance to chloride ion penetration of the specimens with lithium slag powder and phosphorus slag powder is better than that of the blank group. Among them, the resistance to chloride ion penetration of the specimens mixed with lithium slag powder and phosphorus slag powder is between that of the specimens with single lithium slag powder or single phosphorus slag powder, and the resistance to chloride ion penetration of the specimens with single lithium slag powder is the best. The chloride ion in recycled concrete is mainly physical adsorption and chemical binding when the environmental chloride ion concentration is low, while the chloride ion is mainly chemical binding when the environmental chloride ion concentration is high. The total chloride ion binding capacity decreases with the increase of the environmental chloride ion concentration. The total chloride ion binding capacity of the specimen mixed with 20% lithium slag powder and 10% phosphorus slag powder is relatively best.

赵俭斌,赵港,杜松岩,等.锂渣粉和磷渣粉对再生混凝土力学及耐久性能的影响[J].混凝土与水泥制品,2023(5):83-87. ZHAO J B,ZHAO G,DU S Y,et al.Effect of Lithium Slag Powder and Phosphorus Slag Powder on Mechanical and Durability of Recycled Concrete[J].China Concrete and Cement Product,2023(5):83-87.

电炉钢渣用作混凝土骨料的研究进展

韩檬1,2，高成杰3，孙健1,2，张亮亮1,2

2023年第5期

摘要

引用本文

韩檬,高成杰,孙健,等.电炉钢渣用作混凝土骨料的研究进展[J].混凝土与水泥制品,2023(5):88-94. HAN M,GAO C J,SUN J,et al.Research Progress of Electric Arc Furnace Slag as Concrete Aggregates[J].China Concrete and Cement Product,2023(5):88-94.

再生砂和再生粉对干粉砂浆工作性和力学性能的影响

凌刚，徐智勇，胡亮，林希

2023年第5期

摘要

引用本文

摘要：将废弃混凝土破碎、筛分制成再生砂和再生粉，研究了再生砂、再生粉分别等质量替代机制砂、石粉对干粉砂浆工作性和力学性能的影响，并对微观结构和水化产物进行了分析。结果表明：再生砂的掺入会增大砂浆的需水量、稠度损失和保水率，降低砂浆的表观密度；再生粉掺入过多会导致砂浆的需水量、表观密度和保水率降低，稠度损失增大；随着再生砂替代率的增加，砂浆的3 d抗压强度降低，28 d抗压强度先增大后减小，这主要归因于再生砂的内养护作用；再生粉对砂浆的3 d和28 d抗压强度影响不大，这主要归因于再生粉的水化作用和晶核效应；综合考虑砂浆的工作性和力学性能，建议再生砂替代率不超过40%，再生粉替代率不超过60%。 Abstract: The effects of recycled sand and recycled powder on the workability and mechanical properties of dry powder mortar were studied, and the microstructure and hydration products were analyzed. The results show that the addition of recycled sand can increase the water demand, consistency loss, and water retention rate of mortar, and reduce the apparent density of mortar. Excessive addition of recycled powder will reduce the water demand, apparent density, and water retention ratio of mortar, and increase the consistency loss. With the increase of the replacement rate of recycled sand, the compressive strength of mortar at 3 days decreases, and the compressive strength at 28 days first increases and then decreases, which is mainly due to the internal curing effect of recycled sand. The influence of recycled powder on the compressive strength of mortar at 3 days and 28 days is not significant, which is mainly due to the hydration and nucleation effects of recycled powder. Considering comprehensively the workability and mechanical properties of mortar, it is recommended that the replacement rate of recycled sand should not exceed 40%, and the replacement rate of recycled powder should not exceed 60%.

凌刚,徐智勇,胡亮,等.再生砂和再生粉对干粉砂浆工作性和力学性能的影响[J].混凝土与水泥制品,2023(5):95-98,102. LING G,XU Z Y,HU L,et al.Effect of Recycled Sand and Recycled Powder on Workability and Mechanical Properties of Dry Powder Mortar[J].China Concrete and Cement Product,2023(5):95-98,102.

大掺量石灰石粉对混凝土性能的影响

何牟1，孟祥杰2

2023年第5期

摘要

引用本文

摘要：研究了石灰石粉的掺量（0、12%、18%、24%、28%、32%）对混凝土工作性、力学性能和抗碳化性能的影响。结果表明：石灰石粉的掺入对混凝土的7 d抗压强度不利，但复掺适量粉煤灰和石灰石粉可提高混凝土的14 d、28 d和130 d抗压强度；混凝土的碳化深度随着碳化时间的增加而增大，复掺适量的粉煤灰和石灰石粉，同时适当延长养护龄期，可保证混凝土的抗碳化性能基本不变，甚至提高，建议石灰石粉的掺量不超过18%。 Abstract: The influence of limestone powder content (0, 12%, 18%, 24%, 28%, 32%) on the workability, mechanical properties and carbonation resistance of concrete was studied. The results show that the limestone powder is unfavorable to the compressive strength of concrete at 7 days, but adding proper content of fly ash and limestone powder can improve the compressive strength of concrete at 14 days, 28 days and 130 days. The carbonation depth of concrete increases with the increase of carbonation time. Adding proper content of fly ash and limestone powder and properly extending the curing time can ensure that the carbonation resistance of concrete is basically unchanged or even improved. It is recommended that the content of limestone powder should not exceed 18%.

何牟,孟祥杰.大掺量石灰石粉对混凝土性能的影响[J].混凝土与水泥制品,2023(5):99-102. HE M,MENG X J.Influence of Large Content of Limestone Powder on Performance of Concrete[J].China Concrete and Cement Product,2023(5):99-102.

超高性能混凝土（UHPC）现场施工控制要点

徐品

2023年第5期

摘要

引用本文

摘要：结合近几年超高性能混凝土（UHPC）项目的前期试验研究成果和现场施工技术要求，分析了UHPC施工配合比的影响因素，指出了UHPC施工质量通病，并提出了相应的防治措施，总结了UHPC低温和高温现场施工的关键技术要点，并对UHPC现场检测方法进行了展望，可为UHPC现场施工提供参考。 Abstract: Based on the previous experimental research results and on-site construction technical requirements of ultra-high performance concrete(UHPC) projects in recent years, the influencing factors of UHPC construction mix proportion are analyzed, the common quality defects in UHPC construction are pointed out and the corresponding prevention measures are put forward, the key technical points of UHPC low and high temperature construction are summarized, and the on-site testing methods for UHPC are prospected, which can provide a reference for UHPC on-site construction.

徐品.超高性能混凝土（UHPC）现场施工控制要点[J].混凝土与水泥制品,2023(5):74-78. XU P.On-Site Construction Points of Ultra-High Performance Concrete(UHPC)[J].China Concrete and Cement Product,2023(5):74-78.

微孔混凝土及其复合墙体的耐高温性能研究

曹万智，高潇，代佳，张笑笑，叶骐瑞，韩广兴，迟骋

2023年第5期

摘要

引用本文

摘要：采用料浆容重法进行了配合比设计，分别制备了表观密度为 600、800、1 000、1 200 kg/m3 的微孔混凝土，并制作了微孔混凝土-XPS-微孔混凝土复合墙体试块，通过立方体试块高温试验和复合墙体单面受热试验，研究了表观密度和结构形式对微孔混凝土复合墙体试块的耐高温性能的影响。结果表明：随着温度的提高，微孔混凝土的质量损失增加，抗压强度和导热系数降低，表观密度对微孔混凝土的耐高温性能影响较大；表观密度越高，微孔混凝土复合墙体的耐高温性能越好，25 -50-25 mm厚的复合墙体的隔热性能最好。 Abstract: The slurry bulk density method was used to design the mix proportion, and the microporous concrete with apparent density of 600, 800, 1 000 and 1 200 kg/m3 was prepared, the test blocks of microporous concrete-XPS- microporous concrete composite wall was prepared, and the effect of the apparent density and structural form on the high temperature resistance of microporous concrete composite wall was studied by high temperature test of cube specimens and single side heating test of composite walls. The results show that with the increase of temperature, the mass loss of microporous concrete increases, and the compressive strength and thermal conductivity decrease. The apparent density has a significant influence on the high temperature resistance of microporous concrete. With the increase of apparent density, the high temperature resistance of the microporous concrete composite wall increases, and the protective layer of 25 mm thick microporous concrete has the best insulation effect on the corl material.

曹万智,高潇,代佳,等.微孔混凝土及其复合墙体的耐高温性能研究[J].混凝土与水泥制品,2023(5):59-62,73. CAO W Z,GAO X,DAI J,et al.Study on the High Temperature Resistance of Micropoprous Concrete and Its Composite Walls[J].China Concrete and Cement Product,2023(5):59-62,73.

聚合物乳液对水泥砂浆性能影响的研究

王克凡1，龙天艳2，王娟2，周志云1

2023年第5期

摘要

引用本文

摘要：为研究不同聚合物乳液对水泥砂浆的改性效果，将苯丙乳液（SA乳液）、醋酸乙烯-乙烯共聚乳液（VAE乳液）和丁苯乳液（SB乳液）单掺或复掺到砂浆中，并测试了试件的拉伸粘结强度、抗压强度、抗折强度。结果表明：单掺SA乳液和单掺VAE乳液均能提高试件的拉伸粘结强度，但随着聚灰比的增加，单掺VAE乳液时的试件拉伸粘结强度逐渐降低，单掺SA乳液时的试件拉伸粘结强度逐渐升高；复掺乳液对试件拉伸粘结强度的改善作用由大到小依次是SB-SA复配乳液、SB-VAE复配乳液、SA-VAE复配乳液；相同SB乳液掺量下，SA乳液和VAE乳液的掺入分别对试件的拉伸粘结强度、抗压强度的提升效果较好；当mVAE∶mSB为1∶1时，二者可发挥协同作用，进一步提高了试件的拉伸粘结强度和抗压强度。 Abstract: In order to study the modification effects of different polymers on mortar, styrene-acrylic emulsion(SA), vinyl acetate ethylene copolymerization emulsion(VAE) and styrene-butadiene emulsion(SB) were added to the mortar by single or compound. The tensile bond strength, compressive strength, flexural strength were tested. The results show that the tensile bond strength of mortar can be improved with the addition VAE or SA single. With the increase of the ratio of polymer to cement, the tensile bond strength of mortar with single-mixing of VAE gradually decreases, the strength of mortar with single-mixing of SA gradually increases. The improvement effect of mixed emulsion on the tensile bond strength of mortar are in descending order: SB-SA, SB-VAE, SA-VAE. Under the same dosage of SB, the incorporation of SA can improves the tensile bond strength of mortar, and the incorporation of VAE can improve the compressive strength of mortar better. When mVAE∶mSB is 1∶1, it has a synergistic role to further improve the tensile bond strength and compressive strength.

王克凡,龙天艳,王娟,等.聚合物乳液对水泥砂浆性能影响的研究[J].混凝土与水泥制品,2023(5):63-67. WANG K F,LONG T Y,WANG J,et al.Study on the Effect of Polymer Emulsion on the Properties of Cement Mortar[J].China Concrete and Cement Product,2023(5):63-67.

新型夹芯保温叠合楼板的传热机理及热工性能研究

贺庆澳1,2，张明山1,3，李本悦3，邓华2，徐铨彪1,3

2023年第5期

摘要

引用本文

摘要：将保温层置于混凝土叠合楼板的预制底板和现浇顶板之间，提出了一种新型夹芯保温叠合楼板（以下简称新型叠合板），建立了稳态传热分析有限元模型，研究了桁架钢筋间距、夹芯层厚度等对新型叠合板传热系数的影响。结果表明：为满足规范传热要求，夹芯层厚度需超过20 mm、材料导热系数需小于0.15 W/(m·K)；新型叠合板热桥效应明显，桁架钢筋对结构传热系数影响可达13.5%；随着夹芯层保温效果的提高，桁架钢筋间距造成的热阻变化占整体热阻的比例逐渐提高，但占钢筋总影响的比例降低。此外，通过对样本模型数据进行回归分析，得到了具有较高精度的传热系数计算公式，可以用来评估此类新型叠合板的保温性能。 Abstract: A new type of sandwich thermal insulation composite floor slabs was proposed, in which the thermal insulation layer was placed between the precast bottom plate and the cast-in-place top plate of reinforced concrete composite floor slabs. The effects of parameters, such as the spacing between the truss bars and the thickness of the sandwich layer, on the thermal transmittance of the sandwich thermal insulation composite floor slabs were investigated. The results show that, the thickness of sandwich layer should exceed 20 mm, and the thermal conductivity of the material should be less than 0.15 W/(m·K) to meet the heat transfer requirements of the specification. The thermal bridge effect of the sandwich thermal insulation composite floor slabs is obvious, with an impact on the thermal transmittance of the structure up to 13.5%. With the improvement of insulation effect of sandwich layer, the proportion of thermal resistance variation caused by the change of truss spacing to the overall thermal resistance gradually increases, but its proportion to the total influence of truss bars decreases. In addition, a new formula for calculating the thermal transmittance with high accuracy is obtained through the regression analysis of the sample model data, which can quickly evaluate the thermal insulation performance of this new type of composite floor slabs.

贺庆澳,张明山,李本悦,等.新型夹芯保温叠合楼板的传热机理及热工性能研究[J].混凝土与水泥制品,2023(5):68-73. HE Q A,ZHANG M S,LI B Y,et al.Research on the Heat Transfer Mechanism and Thermal Performance of Sandwich Thermal Insulation Composite Floor Slabs[J].China Concrete and Cement Product,2023(5):68-73.

超高性能混凝土的收缩性能及收缩预测模型研究

徐怡，陈阳杰，谭昕，李梦翔，康璇，童松如，茅俊涛

2023年第5期

摘要

引用本文

摘要：试验研究了钢纤维掺量（0、1%、2%）对超高性能混凝土（UHPC）收缩性能的影响，对比分析了5种常用的混凝土收缩预测模型对UHPC的适用性，并基于试验数据建立了适用于UHPC的收缩预测模型。结果表明：掺钢纤维UHPC的收缩应变低于未掺钢纤维的对比组，且钢纤维掺量越大，对UHPC的减缩效果越显著；5种常用的混凝土收缩预测模型对UHPC的适用性较低，其中，ACI 209（92）模型高估了UHPC的40 d后收缩应变，B3模型、CEB-FIP 90模型和中国建科院模型低估了UHPC的收缩应变，GL2000模型对90 d龄期时的收缩应变预测值与试验值相对较为接近；建立的指数函数形式的UHPC收缩应变计算模型的精度较高。 Abstract: The influence of steel fiber content(0, 1%, 2%) on the shrinkage performance of ultra-high performance concrete(UHPC) was studied through experiments. The applicability of five commonly used concrete shrinkage prediction models to UHPC was compared and analyzed, and a shrinkage prediction model suitable for UHPC was established based on the test datas. The results show that the shrinkage strain of UHPC mixed with steel fiber is lower than that of comparison group without steel fiber, and the greater the content of steel fiber, the more significant the shrinkage reduction effect of UHPC. The applicability of five commonly used concrete shrinkage prediction models to UHPC is low. ACI 209(92) model overestimates the shrinkage strain of UHPC after 40 days, B3 model, CEB-FIP 90 model and China Academy of Building Research model underestimate the shrinkage strain of UHPC, and GL2000 model predictes the shrinkage strain at the age of 90 days relatively close to the test value. The calculation model of UHPC shrinkage strain in the form of exponential function has high accuracy.

徐怡,陈阳杰,谭昕,等.超高性能混凝土的收缩性能及收缩预测模型研究[J].混凝土与水泥制品,2023(5):50-54. XU Y,CHEN Y J,TAN X,et al.Study on Shrinkage Performance and Shrinkage Prediction Model of Ultra-High Performance Concrete[J].China Concrete and Cement Product,2023(5):50-54.

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