HF-QF膨胀纤维抗裂防水剂对混凝土劈裂抗拉性能的影响研究

Research on the Lnfluence of HF-QF Expansion Fiber Cracking Resistance Waterproof Agent on the Splitting and Tensile Properties of Concrete

本文研究HF-QF膨胀纤维抗裂防水剂对C35普通混凝土劈裂抗拉强度的影响,并通过劈裂抗拉破坏形态、轴心抗压强度、弹性模量和应力-应变曲线充分的分析出了HF-QF膨胀纤维抗裂防水剂在提升混凝土劈裂抗拉性能过程中的实际作用效果。试验结果表明:HF-QF膨胀纤维抗裂防水能够提高C35普通混凝土的劈裂抗拉强度,最佳掺量为30 Kg/m^(3),较空白试样增加了35.50%;掺加HF-QF膨胀纤维抗裂防水剂的混凝土破坏形式为中心开裂破坏并伴随局部受压破坏;HF-QF膨胀纤维混凝土的应力-应变曲线显示了其易于发生脆性破坏的特性。

This article studies the effect of HF-QF expansion fiber anti crack waterproofing agent on the splitting tensile strength of C35 ordinary concrete,and fully analyzes the actual effect of HF-QF expansion fiber anti crack waterproofing agent on improving the splitting tensile performance of concrete through the splitting tensile failure morphology,axial compressive strength,elastic modulus,and stress-strain curve.The experimental results show that HF-QF expansion fiber anti crack waterproofing can improve the splitting tensile strength of C35 ordinary concrete,with an optimal dosage of 30 Kg/m^(3),An increase of 35.50%compared to the blank sample;The failure mode of concrete mixed with HF-QF expansion fiber crack resistant waterproof agent is central cracking failure accompanied by local compression failure;The stress-strain curve of HF-QF expansive fiber concrete shows its susceptibility to brittle failure.