第十二期_2022_《混凝土与水泥制品》杂志社

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第十二期

赣西地区锂渣粉对UHPC性能的影响

柴天红1，2，姜建松1，2，3，黄文聪1，2，3

2022年第12期

摘要

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摘要：研究了锂渣粉（含水率10%）对超高性能混凝土（UHPC）工作性、强度、收缩性能和孔结构的影响，并采用XRD和SEM分析了掺锂渣粉UHPC的水化产物和微观结构。结果表明：随着锂渣粉掺量的增加，UHPC的流动度降低，28 d抗压、抗折强度均呈先增大后减小的趋势，且当锂渣粉掺量为10%时强度达到最大；锂渣粉掺量越大，UHPC的收缩越小，这主要归因于锂渣粉中的水分在基体中起到了较好的内养护作用；随着锂渣粉掺量的增加，UHPC的孔隙率先减小后增大，其中，掺10%锂渣粉UHPC的孔结构较为致密。 Abstract: The influence of lithium slag powder(10% water content) on the workability, strength, shrinkage and pore structure of ultra-high performance concrete(UHPC) was studied, and the hydration products and microstructure of UHPC with lithium slag powder were analyzed by XRD and SEM. The results show that with the increase of lithium slag powder content, the fluidity of UHPC decreases, but the 28 days compressive strength and flexural strength increase first and then decrease, and the strength reaches the maximum when the lithium slag powder content is 10%. The larger the lithium slag powder content is, the smaller the shrinkage of UHPC is, which is mainly due to the better internal curing effect of water in lithium slag powder in the matrix. With the increase of lithium slag powder content, the porosity of UHPC decreases first and then increases, and the pore structure of UHPC with 10% lithium slag powder is relatively dense.

柴天红,姜建松,黄文聪.赣西地区锂渣粉对UHPC性能的影响[J].混凝土与水泥制品,2022(12):76-79,89. CHAI T H,JIANG J S,HUANG W C.Effect of Lithium Slag Powder in Western Jiangxi on Properties of UHPC[J].China Concrete and Cement Products,2022(12):76-79,89

煅烧提升火山岩粉活性的研究

王怀义1，2，王深圳3，杨桂权1，2，程宁宁3

2022年第12期

摘要

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摘要：研究了煅烧温度（200~800 ℃）和恒温时间（10 min、20 min）对新疆和田地区火山岩粉活性的影响，并进行了微观机理分析。结果表明：随着煅烧温度的增大，火山岩粉的活性指数先增大后减小，最佳煅烧方式为煅烧温度500～550 ℃、恒温20 min，此时，火山岩粉的28 d活性指数最大可提高18.0%；火山岩粉经过煅烧后，其中的SiO2、Al2O3、Fe2O3逐步失去结晶水，由晶体态逐渐向无定形态转化，从而增强了火山岩粉参与水泥水化反应的能力。 Abstract: The effects of calcination temperature (200~800 ℃) and constant temperature time (10 min, 20 min) on the activity of volcanic rock powder in Hotan area, Xinjiang were studied, and the microscopic mechanism was analyzed. The results show that with the increase of calcination temperature, the activity index of volcanic rock powder first increases and then decreases. The best calcination method is calcination temperature of 500～550 ℃ and constant temperature time of 20 min. At this time, the 28 day activity index of volcanic rock powder can be increased by 18.0% at most. After the volcanic rock powder is calcined, the SiO2, Al2O3 and Fe2O3 in it gradually lose the crystal water, and gradually transform from the crystalline state to the amorphous form, thus enhancing the ability of volcanic rock powder to participate in the cement hydration reaction.

王怀义,王深圳,杨桂权,等.煅烧提升火山岩粉活性的研究[J].混凝土与水泥制品,2022(12):80-84. WANG H Y,WANG S Z,YANG G Q,et al.Study on Improving the Activity of Volcanic Rock Powder by Calcination[J].China Concrete and Cement Products,2022(12):80-84.

钢渣-矿渣-粉煤灰复合微粉混凝土的抗冻性能研究

黄婧1，周志云2，陈新星1

2022年第12期

摘要

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摘要：研究了钢渣-矿渣-粉煤灰复合微粉混凝土的抗冻性能，分析了冻融循环前后复合微粉混凝土的抗压强度和动弹性模量变化规律。结果表明：当m钢渣∶m矿渣∶m粉煤灰=2∶1∶1时，复合微粉的最优掺量为50%；当m钢渣∶m矿渣∶m粉煤灰=1∶2∶1时，复合微粉的最优掺量为10%；当m钢渣∶m矿渣∶m粉煤灰=1∶1∶2时，复合微粉的最优掺量为40%；当m钢渣∶m矿渣∶m粉煤灰=1∶3∶1时，复合微粉的最优掺量为30%。 Abstract: The frost resistance of steel slag and slag and fly ash composite micro powder concrete was studied, and the change rule of compressive strength and dynamic elastic modulus of composite micro powder concrete before and after freeze-thaw cycle was analyzed. The results show that when msteel slag∶mslag∶mfly ash=2∶1∶1, the optimum content of composite micro powder is 50%. When msteel slag∶mslag∶mfly ash=1∶2∶1, the optimum content of composite micro powder is 10%. When msteel slag∶mslag∶mfly ash=1∶1∶2, the optimum content of composite micro powder is 40%. When msteel slag∶mslag∶mfly ash=1∶3∶1, the optimum content of composite micro powder is 30%.

黄婧,周志云,陈新星.钢渣-矿渣-粉煤灰复合微粉混凝土的抗冻性能研究[J].混凝土与水泥制品,2022(12):85-89. HUANG J,ZHOU Z Y,CHEN X X.Study on Frost Resistance of Steel Slag and Slag and Fly Ash Composite Micro Powder Concrete[J].China Concrete and Cement Products,2022(12):85-89.

自来水厂尾泥协同建筑垃圾制备免烧砖及其性能研究

方爱国1，2，杨中俊1，2，华苏东3，冯贵洋3，张亚男3，王春美4，郭刘超4，胡晓东4，张艳芳1，2，邓翔1，2

2022年第12期

摘要

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摘要：以建筑垃圾、水泥和自来水厂尾泥（含水率为60%）为主要原材料制备了免烧砖，研究了水泥掺量、尾泥掺量和含水率对免烧砖抗压强度的影响，分析了尾泥固化的作用机制。结果表明，免烧砖的最佳配合比为：水泥20%+尾泥20%+建筑垃圾60%，此时，免烧砖的28 d抗压强度、抗冻性能、软化系数和吸水率均达到MU15非烧结垃圾尾矿砖的性能指标要求。实际生产时，需对免烧砖采取覆膜养护措施。 Abstract: The non-fired brick was prepared with construction waste, cement and waterworks sludge (with water content of 60%) as the main raw materials. The effects of cement content and waterworks sludge content and moisture content on the compressive strength of non-fired brick were studied, and the mechanism of the solidification of waterworks sludge was analyzed. The results show that the best mix proportion of non-fired brick is 20% of cement and 20% of waterworks sludge and 60% of construction waste. At this time, the 28 day compressive strength, frost resistance, softening coefficient and water absorption of non-fired brick meet the performance index requirements of MU15 non-fired rubbish gangue brick. In actual production, it is necessary to take film covering curing measures for non-fired bricks.

方爱国,杨中俊,华苏东,等.自来水厂尾泥协同建筑垃圾制备免烧砖及其性能研究[J].混凝土与水泥制品,2022(12):90-93. FANG A G,YANG Z J,HUA S D,et al.Study on Preparation and Properties of Non-fired Brick with Waterworks Sludge and Construction Waste[J].China Concrete and Cement Products,2022(12):90-93.

再生粗骨料混凝土的抗硫酸盐侵蚀损伤模型研究

祁兵

2022年第12期

摘要

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摘要：研究了再生粗骨料取代率对混凝土抗硫酸盐侵蚀性能的影响，建立了不同再生粗骨料取代率混凝土的抗硫酸盐侵蚀损伤模型。结果表明：当侵蚀龄期在144 d内时，不同再生粗骨料取代率试件的相对动弹性模量差别不大；144 d后，随着再生粗骨料取代率的增加，试件的相对动弹性模量大致呈先增大后减小的趋势，掺入较多（＞50%）的再生粗骨料加速了混凝土的后期损伤；基于普通混凝土抗硫酸盐侵蚀损伤模型建立的再生混凝土抗硫酸盐侵蚀损伤模型的精度较高。 Abstract: The influence of recycled coarse aggregate replacement rate on the sulfate resistance of concrete was studied, and the sulfate resistance damage model of concrete with different recycled coarse aggregate replacement rate was established. The results show that when the erosion age is within 144 days, the relative dynamic elastic modulus of the specimens with different recycled coarse aggregate replacement rates has little difference. After 144 days, with the increase of recycled coarse aggregate replacement rate, the relative dynamic elastic modulus of the specimen roughly increases first and then decreases, and the later damage of concrete is accelerated by adding more recycled coarse aggregate(＞50%). The sulfate resistance damage model of recycled concrete established based on the sulfate resistance damage model of ordinary concrete has high accuracy.

祁兵.再生粗骨料混凝土的抗硫酸盐侵蚀损伤模型研究[J].混凝土与水泥制品,2022(12):94-96,100. QI B.Study on Sulfate Resistance Damage Model of Recycled Coarse Aggregate Concrete[J].China Concrete and Cement Products,2022(12):94-96,100.

透水混凝土的力学性能优化及影响因素研究

张杨1，2，郑扬1，2，黄九达1，2

2022年第12期

摘要

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摘要：研究了灰骨比、骨料级配和粉煤灰掺量对透水混凝土力学性能和透水性能的影响。结果表明：随着灰骨比的增大，透水混凝土的抗压强度先增大后减小，空心率总体呈降低趋势，最佳灰骨比为0.22；与单一粒径骨料相比，采用级配骨料可有效提高透水混凝土的抗压强度，当骨料级配为m9.50~13.20 mm∶m4.75~9.50 mm∶m2.36~4.75 mm=30∶50∶20时，透水混凝土的抗压强度和空心率相对最佳；随着粉煤灰掺量的增加，透水混凝土空心率和透水系数均呈下降趋势，抗压强度和抗折强度均先增大后减小，最佳粉煤灰掺量为20%。 Abstract: The effects of the cement-aggregate ratio, aggregate gradation and fly ash content on the mechanical properties and water permeability of pervious concrete were studied. The results show that the compressive strength of pervious concrete first increases and then decreases with the increase of the cement-aggregate ratio, and the hollow ratio generally decreases, and the optimum cement-aggregate ratio is 0.22. Compared with single size aggregate, the use of graded aggregate can effectively improve the compressive strength of pervious concrete. When the aggregate gradation is m9.50~13.20 mm∶m4.75~9.50 mm∶m2.36~4.75 mm=30∶50∶20, the compressive strength and hollow ratio of pervious concrete are relatively optimal. With the increase of fly ash content, the hollow ratio and permeability coefficient of pervious concrete show a downward trend, and the compressive strength and flexural strength increase first and then decrease, and the optimal fly ash content is 20%.

张杨,郑扬,黄九达.透水混凝土的力学性能优化及影响因素研究[J].混凝土与水泥制品,2022(12):97-100. ZHANG Y,ZHENG Y,HUANG J D.Study on Mechanical Performance Optimization and Influencing Factors of Pervious Concrete[J].China Concrete and Cement Products,2022(12):97-100.

GFRP筋和纤维增强混凝土板的抗弯性能研究

肖良丽，孙帆樯，周翔，杨曌

2022年第12期

摘要

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摘要：研究了玄武岩纤维（BF）掺量对掺沙漠砂混凝土抗压强度、单轴受压应力-应变曲线、劈裂抗拉强度和弹性模量的影响。结果表明：BF对掺沙漠砂混凝土的抗压强度和弹性模量影响较小；掺沙漠砂混凝土的劈裂抗拉强度随着BF掺量的增加呈先增大后减小的趋势，BF最佳掺量为0.4%；BF掺沙漠砂混凝土的应力-应变曲线发展规律与普通混凝土类似；采用普通混凝土的弹性模量计算公式能较准确地计算出BF掺沙漠砂混凝土的弹性模量。 Abstract: The effects of basalt fiber(BF) content on compressive strength, uniaxial compression stress-strain curve, splitting tensile strength and elastic modulus of concrete mixed with desert sand were studied. The results show that BF has a little effect on the compressive strength and elastic modulus of concrete mixed with desert sand. The splitting tensile strength of concrete with desert sand increases first and then decreases with the increase of BF content, and the optimum BF content is 0.4%. The stress-strain curve of BF concrete mixed with desert sand is similar to that of ordinary concrete. The elastic modulus of BF concrete mixed with desert sand can be calculated accurately by using the elastic modulus formula of ordinary concrete.

肖良丽,孙帆樯,周翔,等.GFRP筋和纤维增强混凝土板的抗弯性能研究[J].混凝土与水泥制品,2022(12):62-66. XIAO L L,SUN F Q,ZHOU X,et al.Flexural Performance of Concrete Slabs Reinforced with GFRP Bars and Fiber[J].China Concrete and Cement Products,2022(12):62-66.

泡沫混凝土复配发泡剂配合比试验研究

孙迪1，陶子程1，马杨2，吴学红3，潘鹏飞1，杜俊松1，陈明秀1，杨建平1

2022年第12期

摘要

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摘要：通过试验确定了不同发泡剂（阴离子型表面活性剂F01、非离子型表面活性剂F02、表面活性剂F03、蛋白质发泡剂F04、表面活性剂F05）和稳泡剂W01的最佳稀释倍率范围，从而优选出了合适的发泡剂类型。基于此，通过正交试验研究了发泡剂和稳泡剂的稀释倍率对发泡效果和稳泡能力的影响，得到了不同发泡剂与稳泡剂的最佳稀释倍率，并给出了最佳复配比例。结果表明：发泡剂F02、F03、F04和稳泡剂W01的最佳稀释倍率分别为70、80、120和150，最佳复配比例（质量比）为14.3∶12.5∶8.3∶6.7。 Abstract: The optimal dilution ratio range of different foaming agents (anionic surfactant F01, non-ionic surfactant F02, surfactant F03, protein foaming agent F04, surfactant F05) and foam stabilizing agent W01 was determined through experiments, and the appropriate type of foaming agents was selected. Based on this, the influence of the dilution ratio of foaming agents and foam stabilizing agent on the foaming effect and foam stability was studied through orthogonal test, and the optimal dilution ratio of different foaming agents and foam stabilizing agent was obtained, and the optimal compounding ratio was given. The results show that the optimal dilution ratios of foaming agent F02, F03, F04 and foam stabilizing agent W01 are 70, 80, 120 and 150 respectively, and the optimal compounding ratio (mass ratio) is 14.3∶12.5∶8.3∶6.7.

不同配箍率混凝土叠合梁静力性能有限元分析

邓鑫1，任云2

2022年第12期

摘要

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摘要：通过单调荷载下的缩尺模型试验研究了不同配箍率混凝土叠合梁的静力性能，选择合适的本构模型及边界性质进行了ABAQUS模拟与试验对比。其中，叠合梁分为预制段和现浇段，整浇梁作为对比试件。结果表明：相同配箍率下，叠合梁较整浇梁更易发生剪切破坏，叠合梁的延性较整浇梁有所降低；提高配箍率可提高叠合梁的延性；ABAQUS模拟结果与试验结果的吻合度较高。可为设计高性能叠合梁提供依据。 Abstract: The static performance of concrete composite beams with different stirrup ratios was studied by scale model test under monotonic loads, and the appropriate constitutive model and boundary properties were selected for ABAQUS simulation and compared with tests. The composite beams were divided into prefabricated sections and cast-in-place sections, and the cast-in-place beams were used as the comparison member. The results show that the composite beam is more likely to undergo shear failure than the cast-in-place beam at the same stirrup ratio, and the ductility of the composite beam is reduced compared to the cast-in-place beam. Increasing the stirrup ratio can improve the ductility of composite beam. The ABAQUS simulation results are in good agreement with the test results. The research results can provide a basis for the design of high performance composite beams.

邓鑫,任云.不同配箍率混凝土叠合梁静力性能有限元分析[J].混凝土与水泥制品,2022(12):72-75. DENG X,REN Y.Finte Element Analysis on Static Performance of Concrete Composite Beams with Different Stirrup Ratio[J].China Concrete and Cement Products,2022(12):72-75.

超高性能混凝土工作性和力学性能的影响因素研究

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