Investigation of the properties of high-porosity cement foams based on ternary Portland cement-metakaolin-silica fume blends

被引：54

作者：

Jiang, Jun ^{[1
,2
]}

Lu, Zhongyuan ^{[1
]}

Niu, Yunhui ^{[1
,3
]}

Li, Jun ^{[1
]}

Zhang, Yuping ^{[1
]}

机构：

[1] Southwest Univ Sci & Technol, State Key Lab Cultivat Base Nonmet Composites & F, Mianyang 621010, Peoples R China

[2] Sichuan Huashi Green Homeland Bldg Mat Co Ltd, Chengdu 610000, Peoples R China

[3] China Acad Engn Phys, Mianyang 621010, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2016年 / 107卷

关键词：

Air-void; High-porosity cement foam; Hardened property; Metakaolin; Microstructure; Portland cement; Silica fume; Stability; Workability; CONCRETE; DURABILITY; HYDRATION;

D O I：

10.1016/j.conbuildmat.2015.12.190

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

High-porosity cement foams based on ternary blends of Portland cement, metakaolin and silica fume were prepared by the pre-foaming method. The effects of ternary blends on the early-age properties, air-void structure and hardened state properties of cement foams were investigated. The effect of meta kaolin and silica fume on stabilizing air-voids was observed, and the collapse of cement foams during the hardening process was avoided by addition of metakaolin. Moreover, the compressive strength of the prepared 91% high-porosity cement foams was enhanced by addition of metakaolin and silica fume. The compressive strength and thermal conductivity reached 0.74 MPa and 0.054 W/m K, respectively. However, metakaolin and silica fume had a negative impact on the workability of the cement foam. (c) 2015 Elsevier Ltd. All rights reserved.

引用

页码：181 / 190

页数：10

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