不同集料对粉煤灰基泡沫混凝土强度的影响  

Effects of different aggregates on the strength of fly ash-based foam concrete

作　　者：邱绍诚 戴达松[2] QIU Shaocheng;DAI Dasong(School of Civil Engineering and Architecture,Zhangzhou Vocational and Technical College,Zhangzhou 363000,China;College of Materials Engineering,Fujian Agriculture and Forestry University,Fuzhou 350108,China)

机构地区：[1]漳州职业技术学院建筑工程学院,福建漳州363000 [2]福建农林大学材料工程学院,福建福州350108

出　　处：《邵阳学院学报（自然科学版）》2023年第3期57-66,共10页Journal of Shaoyang University：Natural Science Edition

基　　金：漳州职业技术学院2021年校级课题(ZZY2021B084);福建省科技计划重点项目(2015Y0053);福建林业科技项目(KLB18007A);福建农林大学大学生创新创业训练计划项目(X202210389362)。

摘　　要：以发展节能环保建筑材料为导向,针对A06级粉煤灰泡沫混凝土抗折和抗压强度偏低的缺陷,试验通过添加石粉和矿渣两种矿物掺合料以及骨料细砂对粉煤灰泡沫混凝土进行改性;结合扫描电子显微镜(SEM)和Image J图像处理软件对粉煤灰泡沫混凝土的微观形貌及孔隙参数进行分析计算。试验结果表明,石粉掺入量4%,矿渣掺入量10%有助于提高粉煤灰泡沫混凝土抗折和抗压强度,掺入细砂对于抗折强度有一定程度提高,但是不利于提升抗压强度,掺入石粉和矿渣使得粉煤灰泡沫混凝土形成稳定的针状水化产物,掺入石粉和矿渣有利于降低粉煤灰泡沫混凝土的孔隙率,提高其力学强度。This experiment aimed to improve the low flexural strength and compressive strength of A06 grade fly ash foam concrete by adding mineral admixtures stone powder,slag and fine sand to develop energy-saving and environmental-friendly building materials.At the same time,Scanning Electron Microscope(SEM) and ImageJ software were employed to analyze the morphology and the structure of pore of foam concrete.The results show that the addition of 4% stone powder and 10% slag could increase the flexural and compressive strength of fly ash foam concrete.The addition of fine sand somehow leads to the enhancement on the flexural strength,but is detrimental to the compression strength.The stone powder and slag admixtures form stable needle-shaped hydration product in the fly ash foam concrete,which reduces the porosity and improves the mechanical strength.

关 键 词：粉煤灰 石粉 矿渣 细砂 泡沫混凝土 力学强度 

分 类 号：TU528.2[建筑科学—建筑技术科学]