钢纤维全轻混凝土抗冻性能研究  

Frost performance of steel fiber reinforced full light-weight concrete

作　　者：李长永[1,2] 陈淮[1] 赵顺波[2] 

机构地区：[1]郑州大学土木工程学院,河南郑州450001 [2]华北水利水电学院,河南郑州450011

出　　处：《混凝土》2011年第11期98-99,102,共3页Concrete

基　　金：郑州市科技领军人才项目(096SYJH23105);河南省高校创新人才培养工程培养对象项目(豫教高[2004]294号)

摘　　要：试验研究了水泥用量、水灰比和钢纤维对全轻混凝土、钢纤维全轻混凝土抗冻性能的影响,混凝土轻骨料采用膨胀页岩陶粒和轻砂。结果表明:全轻混凝土和钢纤维全轻混凝土均未因冻融循环产生质量损失;与相对动弹性模量比较,抗弯强度损失率随冻融循环的变化更加明显。采用适当水泥用量和水灰比配制的全轻混凝土具有一定的抗冻能力,钢纤维对全轻混凝土抗冻性能具有显著的增强效果。建议对于主要承受弯曲作用的结构构件混凝土,增加抗弯强度损失率作为抗冻性评价指标。The effects of cement content,water to cement ratio and steel fiber on freeze-thaw properties of full lightweight concrete（FLC） and steel fiber reinforced full lightweight concrete（SFRFLC） were studied by rapid freeze-thaw test method.The lightweight aggregates were expanded-shale and lightweight sand.The results show that the FLC and SFRFLC are not mass loss resulted from freeze-thaw cycles,and the loss rate of flexural strength is sensitive to freeze-thaw cycles than the relative dynamic modulus of elasticity;certain capacity of FLC to resist freeze-thaw can be got by properly proportions with cement content and water to cement ratio;the freeze-thaw resistance of SFRFLC is obviously enhanced by adding steel fiber.It is proposed that adding the loss rate of flexural strength as the evaluation index for freeze-thaw resistance of FLC and SFRFLC when they are used for structural members mainly subjected to flexural actions.

关 键 词：全轻混凝土 钢纤维 抗冻性能 质量损失 相对动弹性模量 抗弯强度 

分 类 号：TU528.572[建筑科学—建筑技术科学]