海水集料混凝土单轴受压力学特性试验研究  

Experimental Research on Uniaxial Compressive Mechanical Properties of SAP Concrete

作　　者：郑国欣 程华[1] 朱国华[1] 

机构地区：[1]后勤工程学院军事土木工程系,重庆401311

出　　处：《后勤工程学院学报》2016年第5期71-76,共6页Journal of Logistical Engineering University

基　　金：全军后勤科研计划项目(BY214J013)

摘　　要：进行不同SAP体积分数和不同龄期下海水集料混凝土的单轴受压应力-应变全曲线试验,分析龄期和SAP体积分数对海水集料混凝土抗压强度、峰值应变、残余强度和弹性模量的影响。结果表明:SAP体积分数在30%以内时,不同龄期海水集料混凝土的破坏形式均为劈裂破坏;海水集料混凝土内部完全干燥时,其极限应变和残余强度均大于普通混凝土;海水集料混凝土的极限应变可视为弹性极限应变,可将其应力-应变全曲线分为上升段、下降段和平台段分别进行拟合。The uniaxial compressive stress-strain curve of SAP concrete under different SAP volume fractions and ages weretested and considered. An analysis was made of the influence of varying SAP volume fractions and ages on the compressive strength,peak strain, residual strength and elastic modulus. The test results indicate that, within 30% volume fraction, the failure mode ofSAP concrete is brittle splitting failure. With the interior of SAP concrete is completely dry, its peak strain and residual strength arehigher than those of the conventional concrete. The limit strain of SAP concrete can be regarded as its elastic limit strain. Equationsare proposed for the uniaxial compressive stress-strain curve of SAP concrete under different SAP volume fractions and ages. Final-ly, the stress-strain curve of SAP concrete can be fit at its ascent stage, descent stage and platform stage, respectively.

关 键 词：海水集料混凝土 单轴受压 本构模型 龄期 

分 类 号：TU502[建筑科学—建筑技术科学]