纤维再生混凝土的强度分析

Analysis on strength of fiber recycled aggregate concrete

以再生骨料(RA)、粉煤灰(FA)、减水剂(WR)的掺量和纤维种类为因素,拉压比和折压比为指标,对纤维再生混凝土正交测试结果进行极差分析、点图分析、方差分析和矩阵分析。结果表明:纤维种类对拉压比有显著影响,其后依次是WR掺量,RA掺量、FA掺量;而纤维种类为折压比的主要显著因子,RA掺量第二,FA掺量次之,WR掺量的作用最小。随着RA掺量的增加,拉压比与折压比逐渐增大;随着FA掺量与WR掺量的增加,拉压比与折压比均先减小后增大;端钩型钢纤维对拉压比与折压比的增强效果比较良好。纤维再生混凝土的最佳延性组合:RA掺量为100%,FA掺量为20%,WR掺量为1.0%。本文结果可为相关研究提供参考。

The orthogonal test results of fiber recycled aggregate concrete are analyzed by range analysis,dot map analysis,variance analysis and matrix analysis,by taking recycled aggregate(RA),fly ash(FA),water reducer(WR)and fiber types as factors,and taking tension-compression ratio and compression flexure ratio as indicators. The results show that the fiber types have a significant influence on the tension-compression ratio,followed by WR content,RA content and FA content. The fiber types have a significant effect on the compression flexure ratio,followed by RA content,FA content and WR content. With the increase of RA content,the tension-compression ratio and the compression flexure ratio increase gradually. With the increase of FA content and WR content,the tension-compression ratio and the compression flexure ratio decrease first and then increase. The end hook steel fiber has a relatively good reinforcement effect on the tension-compression ratio and the compression flexure ratio. The optimum ductility combination of fiber recycled aggregate concrete is the experimental group of single end hook steel fiber with 100% RA content,20% FA content and 1.0% WR content. The results could provide references for related research.