Eco-efficient alkali-activated cement based on red clay brick wastes suitable for the manufacturing of building materials

被引：103

作者：

Andres Robayo-Salazar, Rafael ^{[1
]}

Mercedes Mejia-Arcila, Johanna ^{[1
]}

Mejia de Gutierrez, Ruby ^{[1
]}

机构：

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

来源：

JOURNAL OF CLEANER PRODUCTION | 2017年 / 166卷

关键词：

Red clay brick waste; Alkali-activated materials; Hybrid cements; Eco-efficient construction and building materials; Industrial waste recycling; Life cycle assessment; BLAST-FURNACE SLAG; RICE HUSK ASH; A-S-H; FLY-ASH; PORTLAND-CEMENT; GEOPOLYMER; HYDRATION; CONCRETE; BINDERS; OPC;

D O I：

10.1016/j.jclepro.2017.07.243

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The objective of this study was to obtain hybrid-type binders at room temperature (25 degrees C) from the alkaline activation of a red clay brick waste and the addition of a reduced amount (<= 30%) of Portland cement. Different types of activators were used, including solids (Na2SO4, Na2CO3, NaOH) and liquids(Na(2)SiO(3)xH(2)O). The results highlight the possibility of obtaining an eco-efficient, hybrid cement with compressive strengths of up to 102 MPa at 28 days and reductions of up to 73% in the global warming potential (expressed in kg. CO2. eq/MPa) associated with a Portland cement paste. Based on the optimum hybrid cement, a mortar was developed and used as a base material for the production of block and paver construction elements that comply with construction industry standards. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：242 / 252

页数：11

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