Open AccessHeat-insulating non-autoclaved lightweight concrete with hydraulic ash removal
Author(s) -
A. I. Kudyakov,
А.Б. Стешенко,
N. P. Dushenin,
N. E. Ryabtseva
Publication year - 2021
Publication title -
vestnik tomskogo gosudarstvennogo arhitekturno-stroitelʹnogo universiteta
Language(s) - English
Resource type - Journals
eISSN - 2310-0044
pISSN - 1607-1859
DOI - 10.31675/1607-1859-2021-23-5-105-117
Subject(s) - fly ash , materials science , compressive strength , absorption of water , curing (chemistry) , bottom ash , raw material , brick , cement , composite material , plasticizer , tobermorite , hardening (computing) , thermal conductivity , fineness , aluminosilicate , waste management , engineering , biochemistry , chemistry , catalysis , organic chemistry , layer (electronics)
The paper presents research results of natural hardening of lightweight concrete with aluminosilicate ash generated by the Thermal Power Plant in Seversk (Tomsk, Russia). Today, it is necessary to develop effective building materials with improved operational properties by using local natural and technogenic raw materials. The acceleration of the structure formation and required plasticity for a transportation and molding of lightweight concrete products are achieved by using finely dispersed aluminosilicate minerals and plasticizers for natural hardening of lightweight concrete. The concrete mixture and lightweight concrete are studied in the TSUAB laboratory accredited in accordance with national standard requirements. The optimum content of hydraulic ash in lightweight concrete mixture is 10–15 wt.%. the compressive strength lightweight concrete with D400 density increases by 26−66 % after 28-day curing, when adding the Relamix T-2 plasticizer and ash from the Thermal Power Plant. Its water absorption reduces by 30 wt.% with insignificant decrease in thermal conductivity. Technological solutions are developed for the production of lightweight concrete with ash ash and slag materials for wall structures in individual housing construction.