摘要
研究了锆硅渣对泡沫混凝土凝结时间及抗压强度等的影响,并通过扫描电子显微镜及X射线衍射仪对锆硅渣添加后的作用机理进行了分析。结果表明,锆硅渣可显著缩短料浆的初凝和终凝时间,减少泡沫混凝土孔壁的微裂纹,提高基体内部结构致密度。与纯水泥泡沫混凝土相比,以锆硅渣为掺合料制备的泡沫混凝土气孔分布均匀,在相同干密度等级的条件下,锆硅渣泡沫混凝土的抗压强度明显较高,且吸水率低,软化系数大、导热系数低。
The effects of Zr-contained silica residue on the setting time of the slurry and the compressive strength of the foam concrete were investigated. SEM and XRD were employed to analyze the mechanism of Zr-contained silica residue in the foam concrete. The results showed that Zr-contained silica residue could significantly shorten the initial and final setting time of the slurry,decrease the micro-crack of foam concrete wall,and increase the compactness of foam concrete. Compared with the pure cement foam concrete,the sample with more homogeneous pore distribution was achieved in Zr-contained Silica residue foam concrete. Therefore,at the same density grade,the samples of Zr-contained silica residue foam concrete would have higher compressive strength,lower water absorption, higher softening coefficient and lower thermal conductivity than that of pure cement foam concrete.
出处
《新型建筑材料》
北大核心
2016年第12期80-83,共4页
New Building Materials
基金
山东省墙材革新与建筑节能科研开发项目(2013)
山东省住房城乡建设科技项目计划(2016)
关键词
泡沫混凝土
锆硅渣
干密度
抗压强度
foam concrete,Zr-contained silica residue,dry bulk density,compressive strength
