【摘要】 据再生粗骨料混凝土超声声速和相对动弹性模量的关系，研究了在不同浓度硫酸钠（2%、5%、10%）和氯化钠-硫酸钠混合溶液（0、2%、5%、10%氯化钠+5%硫酸钠）浸泡环境中，不同粗骨料取代率水平（0、30%、50%、70%、100%）下的再生粗骨料混凝土硫酸盐侵蚀损伤的规律；利用复合函数拟合得到了不同硫酸盐溶液浸泡下再生粗骨料混凝土的损伤演化方程，分析了取代率、硫酸钠浓度和氯化钠浓度等因素对再生粗骨料混凝土损伤劣化的影响规律。更多还原

【Abstract】 Based on the relationship between ultrasonic velocity and relative dynamic modulus of elasticity of recycled coarse aggregate concrete,The rules of sulfate erosion damage of recycled coarse aggregate concrete were studied under different levels of coarse aggregate replacement rate(0,30%,50%,70%,100%)in soaking environment with different concentration of sodium sulfate(2%,5%,10%)and mixed solution of sodium chloride and sodium sulfate(0,2%,5%,10% sodium chloride+5% sodium sulfate).The damage evolution equation of recycled coarse aggregate concrete under different sulfate solution immersion was obtained by using composite function fitting,and the influence of factors such as coarse aggregate replacement rate,sodium sulfate concentration and sodium chloride concentration on the damage degradation of recycled coarse aggregate concrete was analyzed.更多还原