纤维水泥及制品_2021_《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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纤维水泥及制品

高性能纤维增强水泥基复合材料及其墙材制品性能试验研究

麻鹏飞，程宝军，高育欣，康升荣，涂玉林

2021年第7期

摘要

引用本文

摘要：制备了一种以高性能纤维增强水泥基复合材料为壳体、泡沫混凝土为芯体的新型复合墙板，并对其力学性能、热工性能进行了研究。结果表明：随着纤维掺量的增加，复合墙板的3 d、7 d和28 d抗折强度明显增加，7 d和28 d抗折强度均能达到20 MPa以上，极限抗弯荷载系数为9.0；空心墙板的力学性能与复合墙板基本一致；空心墙板的传热系数较高，为3.20 W/（m2·K），复合墙板的传热系数最低，为0.82 W/（m2·K）。 Abstract: A new type of composite wallboard with high-performance fiber reinforced cement-based composite materials as the shell and foamed concrete as the core was prepared, and its mechanical and thermal properties were studied. The results show that with the increase of fiber content, the 3 d, 7 d and 28 d flexural strength of the composite wallboard obviously increase, and the 7 d and 28 d flexural strength can reach more than 20 MPa, and the ultimate flexural load coefficient is 9.0. The mechanical properties of hollow wallboard and composite wallboard are basically identical. The heat transfer coefficient of hollow wallboard is higher, which is 3.20 W/（m2·K）, and the heat transfer coefficient of composite wallboard is the lowest, which is 0.82 W/（m2·K）.

麻鹏飞,程宝军,高育欣,等.高性能纤维增强水泥基复合材料及其墙材制品性能试验研究[J].混凝土与水泥制品,2021(7):47-51. MA P F,CHENG B J,GAO Y X,et al.Experimental Study on Properties of High-performance Fiber Reinforced Cement-based Composites and Wall Products[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(7):47-51.

硫酸盐与冻融环境下钢纤维橡胶混凝土的劣化规律研究

姜磊1，魏颖旗2，张明1，杨玉东1

2021年第7期

摘要

引用本文

摘要：通过快速冻融试验，测试了不同冻融循环次数后钢纤维橡胶混凝土的质量、相对动弹性模量、抗压强度及损伤层厚度，研究了硫酸盐与冻融环境下钢纤维橡胶混凝土的劣化规律与损伤机理。结果表明：钢纤维橡胶混凝土在硫酸盐溶液中的冻融损伤小于未掺钢纤维的橡胶混凝土；钢纤维橡胶混凝土的劣化程度随钢纤维掺量的增加逐渐减小，但当钢纤维掺量为2.0%时，劣化程度明显增大；损伤层厚度可以表征钢纤维橡胶混凝土的内部损伤，随损伤层厚度增加，损伤层混凝土的抗压强度损失明显；硫酸盐与冻融环境下钢纤维橡胶混凝土的抗压强度与损伤层抗压强度存在相关性，根据劣化后钢纤维橡胶混凝土的抗压强度可计算出损伤层抗压强度。 Abstract：Through the freeze-thaw tests, the weight, relative dynamic elastic modulus, compressive strength and damage layer thickness of steel fiber reinforced rubber concrete(SFRRC) after different freeze-thaw cycles were tested. The deterioration law and damage mechanism of SFRRC under sulfate and freeze-thaw environment were studied. The results show that the freeze-thaw damage of SFRRC in sulfate solution is less than that of rubber concrete without steel fiber. The deterioration degree of SFRRC decreases with the increase of steel fiber content, but the deterioration degree of SFRRC increases obviously when steel fiber content is 2.0%. The damage layer thickness can be used to characterize the internal damage of SFRRC. With the increase of damage layer thickness, the compressive strength loss of damaged layer concrete is obviously. There is a correlation between the compressive strength of SFRRC and the compressive strength of damaged layer under sulfate and freeze-thaw environment. According to the compressive strength of deteriorated SFRRC, the compressive strength of damaged layer can be calculated.

姜磊，魏颖旗，张明,等.硫酸盐与冻融环境下钢纤维橡胶混凝土的劣化规律研究[J].混凝土与水泥制品,2021(7):52-56,62. JIANG L,WEI Y Q,ZHANG M,et al.Damage Degradation Law of Steel Fiber Reinforced Rubber Concrete in Sulfate Solution and Freeze-thaw Environment[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(7):52-56,62.

橡胶纤维混凝土多指标配合比优化试验研究

刘长顺1,2，张景奎2，郑继1,2，杨志1

2021年第7期

摘要

引用本文

摘要：基于不同的统计方法，研究了聚丙烯纤维掺量、橡胶掺量、橡胶颗粒粒径对混凝土各项指标（28 d强度、脆性、抗裂性能、抗渗性能）的影响。结果表明：当影响各指标的主次因素不一致，显著性不完全相同时，仅采用极差、方差分析法无法确定多指标橡胶纤维混凝土的最优配合比；采用综合平衡法虽然可以得出最优配合比，但该方法主观性强、分析复杂、实施困难；采用层次分析法时，所得结果与综合平衡法一致，且层次分析法相比于综合平衡法具有计算分析简单、结果客观准确等优点；橡胶纤维混凝土的最优配合比为0.9 kg/m3聚丙烯纤维+10%粒径2 mm的橡胶颗粒。 Abstract: Based on different statistical methods, the effects of polypropylene fiber content, rubber content and rubber particle size on the concrete indexes (28 d strength, brittleness, crack resistance and impermeability) were studied. The results show that when the primary and secondary factors affecting each index are not consistent, and the significance is not completely the same, only using range and variance analysis method can not determine the optimal mix proportion of rubber fiber reinforced concrete with multi indexes. Although the comprehensive balance method can be used to obtain the optimal mix proportion, it is subjective, complex and difficult to implement. Compared with the comprehensive balance method, the analytic hierarchy process has the advantages of simple calculation and accurate results. The optimal mix proportion of rubber fiber reinforced concrete is 0.9 kg/m3 polypropylene fiber+10% rubber with particle size of 2 mm.

刘长顺,张景奎,郑继,等.橡胶纤维混凝土多指标配合比优化试验研究[J].混凝土与水泥制品,2021(7):57-62. LIU C S,ZHANG J K,ZHENG J,et al.Experimental Study on Multi Index Mix Proportion Optimization of Rubber Fiber Reinforced Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(7):57-62.

高温后PVA-玄武岩混杂纤维高性能混凝土力学性能试验研究

陈晨，张晓东，李曈，范锦泽

2021年第7期

摘要

引用本文

摘要：研究了玄武岩纤维掺量、PVA纤维掺量以及矿渣微粉掺量对高温后PVA-玄武岩混杂纤维高性能混凝土（HFHPC）抗压强度和抗折强度的影响。结果表明：200 ℃时，试件的抗压强度有所提高，抗折强度变化不明显，200 ℃后，试件的强度随温度的升高而降低；与素混凝土相比，HFHPC的强度残余率更高；随着玄武岩纤维掺量、PVA纤维掺量的增加，试件强度逐渐增大；10%矿渣微粉对强度的提高贡献最大，掺量大于20%时强度明显减小。 Abstract: The effects of basalt fiber content, PVA fiber content and slag powder content on the compressive strength and flexural strength of PVA-basalt hybrid fiber high performance concrete (HFHPC) after high temperature were studied. The results show that the compressive strength of the specimen increases at 200 ℃, but the flexural strength does not change significantly. After 200 ℃, the strength of the specimen decreases with the increase of temperature. The residual strength rate of HFHPC is higher than that of plain concrete. With the increase of basalt fiber content and PVA fiber content, the strength of the specimen increases gradually. 10% slag powder has the greatest improvement on the strength of the HFHPC, but the strength decreases obviously when the content is more than 20%.

陈晨,张晓东,李曈,等.高温后PVA-玄武岩混杂纤维高性能混凝土力学性能试验研究[J].混凝土与水泥制品,2021(7):63-66,75. CHEN C,ZHANG X D,LI T,et al.Experimental Study on Mechanical Properties of PVA-basalt Hybrid Fiber High Performance Concrete After High Temperature[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(7):63-66,75.

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