掺不同纤维的活性粉末混凝土力学性能研究  

Research on Mechanical Properties of Reactive Powder Concrete by Adding Different Fiber

作　　者：曹霞[1] 彭金成[1] 李文龙[1] 

机构地区：[1]广西岩土力学与工程重点实验室桂林理工大学土木与建筑工程学院,广西桂林54100

出　　处：《混凝土与水泥制品》2014年第10期54-57,共4页China Concrete and Cement Products

基　　金：国家自然科学基金项目资助(51368013);广西矿冶与环境科学实验中心资助(KH2013ZD007);广西科技攻关项目资助(桂科攻0995004);广西岩土力学与工程重点实验室项目资助课题(11-CX-04)

摘　　要：通过对16组分别掺入钢纤维和聚丙烯纤维的活性粉末混凝土试件进行抗压、抗折强度试验,并且对每组试件采用了三种不同的养护方案。试验结果表明：热水养护对活性粉末混凝土的抗压和抗折强度有较大幅度的提升,当温度达75℃时,提升幅度10%～30%;相比单掺聚丙烯纤维单掺钢纤维对活性粉末混凝土试块的抗压、抗折强度提升幅度更大,钢纤维含量为4%时活性粉末混凝土的抗压和抗折强度分别提高21%和53%;钢纤维掺量为2%和聚丙烯纤维掺量为0.3%并且经过75℃高温养护的活性粉末混凝土试块其抗压、抗折力学性能达到最优,其抗压强度达到168.4MPa,抗折强度达到31.57MPa。Through the compressive strength test and flexural strength test of the 16 groups reactive powder concrete test specimens mixed with steel fiber and polypropylene fiber are carried out, and each test specimen was used three different curing methods. The results show that the compressive strength and flexural strength of reactive powder concrete have a significant increase by using the hot water curing, when the temperature is 75℃, the increasing extent is 10% ～30%. Compared with mixed polypropylene fiber, increasing extents of compressive strength and flexural strength of the specimens mixed steel fiber are bigger, when steel fiber content is 4%, compressive strength and flexural strength of the specimens increase by 21% and 53% respectively; the compressive strength and flexural strength of the specimens combined admixture of 2% steel fiber and 0.3% polypropylene fiber are the best after 75℃ high-temperature curing, their compressive strengths are168.4MPa and flexural strengths are 31.57 MPa.

关 键 词：活性粉末混凝土 钢纤维 聚丙烯纤维 抗压强度 抗折强度 

分 类 号：TU528.572[建筑科学—建筑技术科学]