三种纤维素掺料对混凝土物理和力学性能的影响  

Effects of Three Cellulose Admixtures on Physical and Mechanical Properties of Concrete

作　　者：文壮强 丁杨[2] WEN Zhuang-qiang;DING Yang(Hangzhou Polytechnic,Hangzhou 311402,China;Zhejiang University,Hangzhou 310058,China)

机构地区：[1]杭州科技职业技术学院,浙江杭州311402 [2]浙江大学,浙江杭州310058

出　　处：《山东农业大学学报（自然科学版）》2021年第5期794-798,共5页Journal of Shandong Agricultural University：Natural Science Edition

基　　金：国家自然科学基金(52163034)。

摘　　要：为研发高性能环保混凝土,本文通过在混凝土中分别掺入0%、0.2%、0.5%、1.0%和2%含量的聚丙烯纤维、聚乙烯纤维和碳纤维,通过测试混凝土的坍落度、导热系数和抗压强度来得到最佳纤维掺量。通过试验得出:(1)在0%-1%的掺量中,随着纤维掺量的含量增加,混凝土的坍落度越小。但当纤维含量超过1%时,纤维仍会使得混凝土坍落度下降但坍落度下降率在减小;(2)随着纤维掺量的含量增加,混凝土的导热系数减小,即混凝土的保温隔热性能越好;(3)在0%-1%的掺量中,随着纤维掺量的含量增加,混凝土的抗压强度增大。但当纤维含量超过1%时,混凝土的抗压强度却减小。(4)在三种测试试验中,碳纤维对混凝土性能的提升要好于聚丙烯纤维和聚乙烯纤维。综合上述,建议在混凝土中掺入1%的碳纤维。In order to develop high-performance environmental protection road concrete, polypropylene fiber, polyethylene fiber and carbon fiber with the contents of 0%, 0.2%, 0.5%, 1.0% and 2% were added into the concrete, and the optimum fiber content was obtained by testing the slump, thermal conductivity and compressive strength of the concrete. The results show that:(1) In the content of 0%-1%, the slump of concrete is smaller with the increase of fiber content. However, when the fiber content exceeds 1%, the fiber will still reduce the slump of concrete, but the slump decline rate is decreasing;(2)With the increase of fiber content, the thermal conductivity of concrete decreases, that is, the better the thermal insulation performance of concrete;(3) In the content of 0%-1%, the compressive strength of concrete increases with the increase of fiber content. However, when the fiber content exceeds 1%, the compressive strength of concrete decreases.(4) In the three tests, the improvement of concrete performance by carbon fiber is better than that by polypropylene fiber and polyethylene fiber. Based on the above, it is recommended to add 1% carbon fiber into the concrete.

关 键 词：纤维 混凝土 力学性能 

分 类 号：TU528[建筑科学—建筑技术科学]