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通过测定不同碳化龄期下,水灰比0.4,0.5和0.6的普通硅酸盐水泥砂浆试块和高抗硫酸盐水泥砂浆试块的相对动弹性模量和抗折抗压强度,研究了碳化作用下水泥砂浆的损伤规律。试验结果表明,在一定的碳化龄期内,水泥砂浆试块的相对动弹性模量和抗折抗压强度均随着碳化时间的增加而增加,但其增长速率呈减缓趋势;各水灰比的水泥砂浆试块碳化28d后,其抗压强度比未碳化时提高40%~50%;最大抗折强度比未碳化时提高20%~30%;普通硅酸盐水泥比高抗硫酸盐水泥具有较好的抗碳化性。
By measuring the relative dynamic elastic modulus and flexural and compressive strength of portland cement mortar blocks and high sulfate cement mortar blocks with different cementing ages and water-cement ratios of 0.4, 0.5 and 0.6, the effects of carbonization Under the action of cement mortar damage rules. The results show that the relative dynamic elastic modulus and flexural strength of cement mortar specimens increase with the increase of carbonization time in a certain carbonation age, but the growth rate tends to slow down. The water-cement ratio , The compressive strength of cement mortar increased by 40% -50% compared with that of non-carbonized; the maximum flexural strength increased by 20% -30% compared with that without carbonization; the average Portland cement was higher than that of anti-sulfate cement Has good resistance to carbonation.