不同强度等级低热水泥混凝土的碳化行为研究  

Study on Carbonation Behavior of Low-heat Cement Concrete with Different Strength Grades

作　　者：薛豪 王振地 李嘉璇 

机构地区：[1]中国建筑材料科学研究总院有限公司,北京100024

出　　处：《混凝土世界》2024年第2期35-38,共4页China Concrete

摘　　要：通过碳化深度和抗压强度的变化研究了三种强度等级下低热水泥混凝土碳化行为的差异,并以普通硅酸盐水泥混凝土作对比。结果表明:混凝土强度等级越低,则水灰比和碳化速率越大,其碳化深度也越深;相同强度等级的低热水泥混凝土比普通硅酸盐水泥混凝土的碳化深度略深;普通硅酸盐水泥混凝土和低热水泥混凝土在碳化28 d后的抗压强度均高于同水化龄期而未碳化的混凝土抗压强度;碳化对普通硅酸盐水泥混凝土的抗压强度提升的影响大于低热水泥混凝土。This paper investigates the differences in carbonation behavior of low-heat cement concrete under three strength grades through the changes in carbonation depth and compressive strength,and uses ordinary Portland cement concrete as a comparison.The results show that the lower the strength grade of concrete,the greater the water cement ratio and carbonation rate,and the deeper its carbonation depth;the carbonation depth of low-heat cement concrete with the same strength grade is slightly deeper than that of ordinary Portland cement concrete;the compressive strength of ordinary Portland cement concrete and low-heat cement concrete after 28 days of carbonation is higher than that of non-carbonated concrete at the same hydration age;the effect of carbonization on the compressive strength improvement of ordinary Portland cement concrete is greater than that of low-heat cement concrete.

关 键 词：低热水泥混凝土 强度等级 碳化系数 碳化深度 

分 类 号：TU528.45[建筑科学—建筑技术科学]