Application of eco-friendly alternative activators in alkali-activated materials: A review

被引：159

作者：

Mendes, Beatryz C. ^{[1
]}

Pedroti, Leonardo G. ^{[1
]}

Vieira, Carlos Mauricio F. ^{[2
]}

Marvila, Markssuel ^{[2
]}

Azevedo, Afonso R. G. ^{[2
]}

de Carvalho, Jose Maria Franco ^{[1
]}

Ribeiro, Jose Carlos L. ^{[1
]}

机构：

[1] UFV Fed Univ Vicosa, DEC Civil Engn Dept, Ave Peter Rolfs,S-N,Campus Univ, BR-36570000 Vicosa, MG, Brazil

[2] UENF State Univ Northern Rio de Janeiro, LAMAV Adv Mat Lab, Ave Alberto Lamego 2000, BR-28013602 Campos Dos Goytacazes, Brazil

来源：

JOURNAL OF BUILDING ENGINEERING | 2021年 / 35卷

关键词：

Alkali activated materials; Activators; Wastes; Sustainability; RICE-HUSK ASH; BLAST-FURNACE SLAG; CALCIUM CARBIDE RESIDUE; WATER-TREATMENT SLUDGE; CANE STRAW ASH; FLY-ASH; WASTE GLASS; COMPRESSIVE STRENGTH; SODIUM-SILICATE; RED MUD;

D O I：

10.1016/j.jobe.2020.102010

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Alkali-activated materials are a new class of compounds that have been studied by several authors worldwide. Alkali-activated binders can be competitive alternatives to traditional Portland cement, especially concerning CO2 emissions into the environment. However, in order to obtain this advantage, it is essential to use activators that were produced cleanly and sustainably, which is not the case of commercial products such as NaOH or sodium silicate. This paper provides a brief discussion about the activators traditionally used, and a review of existing literature about alternative activators, produced from agricultural or industrial wastes. Factors such as molar ratios and preparation of the solution were highlighted. The mechanical behavior of the pastes and mortars was also assessed, showing that the performance of alternative activators can be similar or even better than the conventional ones. Finally, some topics for future research on new activators were identified, aiming to stimulate more studies in this field.

引用

页数：14

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