Open AccessInfluence of Aggregate Type on Properties of Geopolymer Concrete
Author(s) -
Надежда Александровна Ерошкина,
Марк Олимпиевич Коровкин
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1079/5/052058
Subject(s) - scrap , aggregate (composite) , shrinkage , geopolymer cement , geopolymer , compressive strength , materials science , flexural strength , cracking , creep , composite material , geotechnical engineering , metallurgy , geology
The results of comparative studies of geopolymer concrete strength made with coarse aggregate based on granite, limestone, concrete scrap were given. It is found that the use of granite aggregate instead of limestone and concrete scrap reduces the strength flexural 2-2.5 times, as on impact - 2.5-3.5 times; the compressive strength decreases by 10-30%. It concluded that the main item that reduces the strength of the investigated geopolymer concrete when using granite aggregate, its low creep is observed, which, with high autogenous shrinkage of the geopolymer binder, leads to concrete cracking. The established features of the influence of the type of aggregate on the properties of concrete substantiate the use of crushed limestone and concrete scrap as a coarse aggregate of geopolymer concrete.