粉煤灰不同掺加方式对再生骨料混凝土弹性模量的影响研究  

Study on the Influence of Different Adding Methods of Fly Ash on Elastic Modulus of Recycled Aggregate Concrete

作　　者：何荣 吴江雪 周勇 彭华程 HE Rong;WU Jiangxue;ZHOU Yong;PENG Huacheng(Bijie Qixingguan District Jingxin Construction Co.,Ltd.)

机构地区：[1]毕节市七星关区晶鑫建筑有限公司

出　　处：《广东建材》2024年第7期9-12,共4页Guangdong Building Materials

摘　　要：为探究再生混凝土复掺矿粉和粉煤灰、单掺粉煤灰下弹性模量差异,文中就粉煤灰不同掺加方式对再生骨料混凝土弹性模量的影响展开研究。结果表明,掺入再生骨料的各组混凝土试件具有低于常规混凝土的弹性模量,单掺粉煤灰后混凝土弹性模量进一步降低。而复掺粉煤灰与矿渣后混凝土弹性模量与粉煤灰和矿渣掺入比例有关,其中粉煤灰掺量为10%、矿渣掺量为20%时试件具有较高弹性模量。对于复掺粉煤灰和矿渣的再生混凝土,其抗压强度与弹性模量之间具有良好相关性,并通过回归计算得到经验公式。In order to explore the difference of elastic modulus of recycled concrete mixed with mineral powder,fly ash and single fly ash,this paper studies the influence of different blending methods of fly ash on the elastic modulus of recycled aggregate concrete.The results show that the elastic modulus of each group of concrete specimens mixed with recycled aggregate is lower than that of conventional concrete,and the elastic modulus of concrete is further reduced after only mixing fly ash.The elastic modulus of concrete mixed with fly ash and slag is related to the proportion of fly ash and slag,and the sample has higher elastic modulus when the fly ash content is 10%and the slag content is 20%.For recycled concrete mixed with fly ash and slag,there is a good correlation between compressive strength and elastic modulus,and the empirical formula is obtained by regression calculation.

关 键 词：再生骨料混凝土 粉煤灰 弹性模量 回归分析 

分 类 号：TU528[建筑科学—建筑技术科学]