克裂速纤维增强高性能混凝土试验研究

AN EXPERIMENTAL STUDY ON THE CEMFIBER REINFORCED HIGH-PERFORMANCE CONCRETE

从克裂速对高性能混凝土工作性、力学性能、耐化学腐蚀性能、干燥收缩变形性能和干燥收缩裂缝的影响等方面进行了系统研究 ,结果表明 :(1)克裂速对高性能混凝土工作性的影响与配合比参数有关 ,总体看来 ,克裂速不会显著降低高性能混凝土工作性 ;(2 )克裂速对高性能混凝土抗压和抗折强度影响不大 ,不会显著降低高性能混凝土强度 ;(3 )掺克裂速的高性能混凝土具有较高的耐盐酸腐蚀的能力 ;(4 )克裂速可以显著降低高性能混凝土干燥收缩变形值 ;(5 )克裂速可以大幅度提高高性能混凝土抑制干燥收缩开裂的能力。

The effects of cemfiber on the workability, mechanical properties, and resistance to chemical corrosion, drying shrinkage and cracking resistance of High Performance Concrete (HPC) have been studied systematically. The results show that:(1) the effects of cemfiber on the workability of HPC are related to parameter of mix proportion. Generally speaking, cemfiber does not reduce the workability of HPC; (2) the effect of cemfiber on the compressive strength and flexural strength is very small;(3) the HPC incorporated with cemfiber has high resistance to corrosion of hydrochloric acid; (4) cemfiber may reduce drying shrinkage of HPC significantly;(5) cemfiber may increase cracking resistance of HPC resulting from drying shrinkage.