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Published in:
2021 | OriginalPaper | Chapter
Obtaining High-Quality Expanded Porous Gravel Based on Low-Expanding Stone-Like Clay
Authors : H. N. Mammadov, A. A. Guvalov
Published in: Innovations and Technologies in Construction
Publisher: Springer International Publishing
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Abstract
The present paper deals with the obtaining of high-quality keramzit aggregate on the base of low-expanding stone-like hydromicaceous clay. The developed technology allows to widen raw stuff base of producing aggregates for lightweight concretes and to improve their physico-mechanical properties.
It has been revealed from investigations that the composition of stone-like clay does not contain sufficient quantity of gas-generating substances which are the main factor of developed pore formation on expansion. For this reason the influence of various pore-forming additives on the expansibility of the said clay was studied. Simutaneously investigations into expansibility of stone-like low-expanding clay depending on expansion condition were being performed. It has been found out that clay expansibility and physico-mechanical properties of the obtained aggregate depend on preliminary thermal treatment temperature, temperature and duration of expansion. Using porous gravel of density brand 300–700, dense sand and plasticizing additives, lightweight concrete of 850–1800 kg/m3 in density and strength of 3.4–42.0 MPa has been produced and using porous gravel, dense sand without plasticizing additives lightweight concrete with density of 1150–1170 kg/m3 and strength of 10.0–35.0 MPa has been obtained.