Alternative cements based on alkali-activated red clay brick waste

被引：103

作者：

Robayo, Rafael A. ^{[1
]}

Mulford, Alexandra ^{[1
]}

Munera, Jorge ^{[1
]}

Mejia de Gutierrez, Ruby ^{[1
]}

机构：

[1] Univ Valle, Composites Mat Grp CENM, Sch Mat Engn, Calle 13 100-00,Edif 349,2 Piso, Cali, Colombia

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2016年 / 128卷

关键词：

Red clay brick waste; Ceramic wastes; Alkaline activation; Alkali-activated cement; Hybrid cement; Compressive strength; FLY-ASH; CONSTRUCTION; CONCRETE; MICROSTRUCTURE; MANAGEMENT; BINDERS;

D O I：

10.1016/j.conbuildmat.2016.10.023

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The synthesis of alkali-activated and hybrid cements based on red clay brick waste was investigated using sodium hydroxide and sodium silicate solution as alkaline activators. The effect on the compressive strength of Na2O/SiO2 and SiO2/Al2O3 molar ratios and type of curing was evaluated. The combined presence of Portland cement (20%) and sodium silicate yielded a maximum compressive strength of 102.6 MPa at 28 days and 25 degrees C; this value is two times higher than the strength obtained in mixtures without Portland cement and 73 times higher than when sodium hydroxide is used. The results demonstrated the feasibility of using these materials to produce structural and non-structural construction elements. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：163 / 169

页数：7

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