Abstract
The tasks related to the expansion of the raw material base in the production of porous aggregates for lightweight concrete with minimal energy consumption are becoming more and more urgent every year. As part of these studies, issues related to the production of porous aggregates for lightweight concrete that can withstand higher loads without compromising quality due to the presence of a crystalline structure of interpore partitions are considered. The material has low water absorption compared to expanded clay, which indicates the ability to maintain its thermal performance over time, and has an almost unlimited service life. The purpose of this study is to obtain foam-glass-crystalline porous aggregates for lightweight concrete using the technology of low-temperature foaming. The object of the study was technogenic production waste containing silica and aluminosilicate components as the main component (slag, TPP ash, enrichment tailings). Research results: the resulting porous fillers are characterized by high physical and mechanical properties: density 200-220 kg/m3; strength 3.1-4.0 MPa; thermal conductivity 0.07 - 0.1 W / (moS); water absorption 1-2%. Samples of light aggregates are characterized by a high degree of uniformity of the pore structure and preferred for strength and thermal conductivity pore sizes up to 1.2 mm and an interpore wall of 50 μm.
Published Version
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