Open AccessInfluence of fly ash and blast furnace slag on characteristics of geopolymer non-autoclaved aerated concrete
Author(s) -
Lê Tuấn Anh,
Nguyễn Thùy Ninh,
Le Quoc Phong Huu,
Le Sinh Hoang,
Nguyen Khoa Tan
Publication year - 2021
Publication title -
tạp chí khoa học giao thông vận tải/transport and communications science journal
Language(s) - English
Resource type - Journals
eISSN - 2615-9554
pISSN - 1859-2724
DOI - 10.47869/tcsj.72.1.4
Subject(s) - fly ash , geopolymer , ground granulated blast furnace slag , materials science , autoclaved aerated concrete , compressive strength , lime , metallurgy , curing (chemistry) , sodium silicate , waste management , composite material , engineering
Geopolymer materials are known as sustainable and environmental material. The main constituents of geopolymer material are alumina and silicon, which can be activated in an alkaline environment. In this paper, the reaction of alumino-silicate materials in the alkaline agent is investigated on geopolymer non-autoclaved aerated concrete (GNAAC). The main constituents of GNAAC are fly ash (FA), blast furnace slag (BSF), lime, gypsum, aluminium powder, and alkaline solution. In the mix proportions, FA and BSF are used to replace crushed sand and cement. The results indicate that the GNAAC can be produced similarly as traditional autoclaved aerated concrete. Besides, the flow diameter of the mixture using blast furnace slag is lower than that of fly ash. The temperature and expansion ability decrease with an increase in FA/BFS – Lime and alkaline content. Furthermore, the compressive strength of GNAAC can be determined by synthesizing geopolymer without steam and pressure curing conditions.