粉煤灰混凝土抗冻性及抗渗性研究  

Study on Frost Resistance and Impermeability of Fly Ash Concrete

作　　者：庄志伟 Zhuang Zhiwei

机构地区：[1]福能联信建设集团有限公司,福建三明366000

出　　处：《江苏建材》2024年第6期44-46,共3页Jiangsu Building Materials

摘　　要：粉煤灰作为一种环保型混凝土掺合材料受到了广泛关注和应用,其加入混凝土中不仅可以有效减少大气中的二氧化碳排放和固体废弃物的产生,还能够改善混凝土的各项工程性能。为探究不同粉煤灰掺量下对混凝土抗冻性及抗渗性的影响,采用控制变量法,以粉煤灰掺量为5%、10%及15%进行实验研究,结果表明:掺入粉煤灰的混凝土在不同次数的冻融循环作用下其质量损失率要明显小于不掺粉煤灰的混凝土,随着冻融循环次数的增加,不同掺量粉煤灰混凝土相对动弹性模量均不断减小,但未掺入粉煤灰的混凝土相对动弹性模量下降要明显大于掺入粉煤灰的值,掺入粉煤灰后混凝土的渗水高度显著下降,在掺入粉煤灰后混凝土的抗渗性显著提升,且随着粉煤灰掺量的增加混凝土的抗渗性得到不断提升。As an environmentally friendly concrete admixture material,fly ash has received extensive attention and application,and its addition to concrete can not only effectively reduce carbon dioxide emissions in the atmosphere and the generation of solid waste,but also improve the engineering performance of concrete.In order to explore the effects of different fly ash dosages on the frost resistance and frost resistance of concrete,the control variable method was used to carry out experimental studies with fly ash content of 5%,10%and 15%,and the results showed that the mass loss rate of concrete mixed with fly ash was significantly lower than that of concrete without fly ash under different freeze-thaw cycles,and the relative dynamic elastic modulus of fly ash concrete with different amounts of fly ash decreased with the increase of the number of freeze-thaw cycles.However,the decrease of the relative dynamic elastic modulus of concrete without fly ash is significantly greater than that of fly ash,the water seepage height of concrete decreases significantly after fly ash is mixed,and the impermeability of concrete is significantly improved after fly ash is added,and the impermeability of concrete is continuously improved with the increase of fly ash content.

关 键 词：粉煤灰惨料 混凝土 抗冻性 抗渗性 

分 类 号：TU522.35[建筑科学—建筑技术科学]