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SHEAR AND FLEXURAL TOUGHNESS OF TAILINGS SAND CEMENT-BASED COMPOSITES REINFORCED BY PVA
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摘要: 通过对聚乙烯醇纤维（PVA）增强水泥基复合材料试件进行双面剪切试验和四点弯曲试验，运用韧性比和韧性指数双特征指标来评价剪切韧性和弯曲韧性，同时观察不同纤维掺量和不同水胶比对剪切韧性和弯曲韧性的影响。试验结果表明：与未掺入纤维的试件相比，PVA增强尾矿砂水泥基复合材料试件的延性和吸收能量的能力有明显提高，掺有纤维的试件其剪切韧性和弯曲韧性较好，试件的韧化程度效果显著，韧性质量大幅增加。试验中水胶比由0.25到0.3再到0.35时，韧性比和韧性指数也相应增加，当水胶比为0.35时，韧性比和韧性指数有较明显提高。Abstract: Through the double-sided shear test and four-point bending test of PVA reinforced cement-based composite, the double-characteristic indexes of toughness ratio and toughness index were used to evaluate the shear toughness and bending toughness, and the effects of different fiber content and water binder ratio on the shear toughness and bending toughness were observed. The test results showed that the ductility and energy absorption capacity of PVA reinforced tailing sand cement-based composite were significantly improved compared with those without fiber, and the shear toughness and bending toughness of the composite with fiber were better, the effect of the toughening degree of the sample was significant, and the toughness quality was greatly increased. In this test, when the water binder ratio was 0.25 to 0.3 to 0.35, the toughness ratio and toughness index increased correspondingly. When the water binder ratio was 0.35, the toughness ratio and toughness index increased obviously.
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Key words:
- PVA /
- tailings sand /
- cement-based composite /
- shear toughness /
- bending toughness /
- toughness ratio /
- toughness index
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李贺东. 超高韧性水泥基复合材料试验研究[D].大连:大连理工大学,2009. 许翔.水工结构工程裂缝成因及防治[J].绿色环保建材,2019(4):214-215. 杨毅超,张德锋,冯伟明,等.超长混凝土结构裂缝控制关键技术在工程中的应用研究[J].建筑结构,2018,48(18):59-63. 伍凯,陈峰,徐方媛,等.型钢与钢纤维混凝土界面黏结性能及损伤耗能试验研究[J].土木工程学报,2019,52(3):1-11,19. AHMED S F U, MAALEJ M. Tensile Strain Hardening Behavior of Hybrid Steel-Polyethylene Fiber Reinforced Cementitious Composites[J]. Conctrution and Building Materials,2009,23(1):96-106. 徐世烺,李贺东.超高韧性水泥基复合材料直接拉伸试验研究[J].土木工程学报,2009,42(9):32-41. 邓宗才,薛会青,李朋远,等.高韧性纤维增强水泥基复合材料的单轴拉伸力学性能[J].北京工业大学学报,2009,35(9):1204-1208. 鲍文博,李林凤,底高浩,等.绿色韧性水泥基复合材料力学性能[J].沈阳工业大学学报,2016,38(6):697-702. 鲍文博,张少峰,曲利辉.尾矿砂PVA水泥基复合材料抗压和抗弯性能试验研究[J].混凝土与水泥制品,2013(10):85-88. 底高浩. 韧性尾矿砂PVA水泥基复合材料力学性能试验研究[D].沈阳:沈阳工业大学,2016. 鲍文博,李维,底高浩,等.一种环保延性水泥基复合材料的制备及其韧性[J].材料研究学报,2018,32(12):905-912. 中国工程建设标准协会.纤维混凝土试验方法标准:CECS 13:2009[S].北京:中国计划出版社,2010. -
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