摘要
将石墨尾矿作为填料制备泡沫混凝土,重点研究石墨尾矿掺入比例和细度、泡沫混凝土水料比和容重,以及聚丙烯纤维掺量对泡沫混凝土物理性能、力学性能和热工性能的影响规律。结果表明:对于同一干密度等级的泡沫混凝土,掺入适量的石墨尾矿可以提高泡沫混凝土的抗压强度,且颗粒越细,提高幅度越大;水料比的提高增大了泡沫混凝土的吸水率,降低了导热系数,泡沫混凝土抗折与抗压强度随水料比的增大呈现出先增加后降低的趋势,在水料比为0.60时,泡沫混凝土强度最高;聚丙烯纤维可以提高泡沫混凝土的韧性,降低吸水率;随着干密度的提高,泡沫混凝土强度和导热系数逐渐增大,吸水率逐渐减小。
Using graphite tailings as filler to prepare foamed concrete,the influence of proportions and fineness of graphite tailings,ratio of water to material and bulk density of foamed concrete,and polypropylene fiber content on the physical properties,mechanical properties and thermal performance of foamed concrete are mainly studied.The experimental results show that for the foamed concrete with the same dry density,adding the appropriate amount of graphite tailings can improve the compressive strength of the foamed concrete,and the smaller the particle is,the greater the increase will be.The increase of ratio of water to material increases the water absorption rate of foamed concrete and reduces the thermal conductivity.The flexural and compressive strength of foamed concrete increases first and then decreases as the ratio of water to material increases.When the ratio of water to material is 0.60,the foamed concrete has the highest strength.The polypropylene fiber can improve the toughness of foam concrete and reduce the water absorption.With the increase of dry density,the strength and thermal conductivity of foamed concrete increase gradually,and the water absorption gradually decreases.
作者
孙小巍
张雯琪
王琪
虎悦
Sun Xiaowei;Zhang Wenqi;Wang Qi;Hu Yue(College of Materials Science and Engineering,Shenyang Jianzhu University,Shenyang,Liaoning 110168)
出处
《非金属矿》
CAS
CSCD
北大核心
2020年第3期9-13,共5页
Non-Metallic Mines
基金
辽宁省教育厅一般项目(lnjc201916)
辽宁省科技厅指导计划项目(20180550127,2019-ZD-0669)
辽宁省大学生创新创业项目(201910153073)。
关键词
石墨尾矿
泡沫混凝土
强度
吸水率
导热系数
graphite tailings
foamed concrete
strength
water absorption
thermal conductivity
