Influence of synthetic calcium silicates on the strength properties of fine-grained concrete

3rd International Youth Scientific Forum with International Participation "New Materials"

Yarusova, S.B.^1,2 ; Gordienko, P.S.^1 ; Kozin, A.V.^3 ; Zhevtun, I.G.^1 ; Perfilev, A.V.^1

Institute of Chemistry, Far-Eastern Branch, Russian Academy of Sciences, 159 Prospekt 100-letya Vladivostoka, Vladivostok

690022, Russia^1

Vladivostok State University of Economics and Service, 41 Gogolya street, Vladivostok

690014, Russia^2

Far-Eastern Federal University, 8 Sukhanova street, Vladivostok

690950, Russia^3

关键词: Acid production;    Control samples;    Fine-grained concretes;    Mass content;    Normal condition;    Strength characteristics;    Strength of concrete;    Strength property;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/347/1/012041/pdf
DOI  :  10.1088/1757-899X/347/1/012041

来源: IOP

【 摘 要 】

The effect of additives based on acicular calcium hydrosilicates (xonotlite and tobermorite) and wollastonite, obtained from boric acid production waste in autoclave synthesis at a temperature of 220 °C, on the strength of fine-grained concrete, has been studied in this paper. It was shown that when the calcium hydrosilicates and wollastonite are introduced, an increase in the strength characteristics of concrete is observed. After heat and moisture treatment, the maximum increase in strength is observed with the addition of 4% of mass content of calcium hydrosilicates and 6% of mass content of wollastonite. After 28 days of hardening under normal conditions, the maximum increase in strength of concrete is observed with the addition of 4% of mass content of both types of additives. It was shown that the water absorption of concrete decreases with a maximum when 4% of mass content is added, as in the case of the introduction of calcium hydrosilicates, and wollastonite. With a further increase in the number of additives, the amount of water absorption increases, but these values remain below the values for the control sample without additives.