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Heat Treatment of Clay Shales and Their Utilization as Active Mineral Additives for the Production of Composite Cements

Baurzhan AmiraliyevDepartment of Silicate Technology and Metallurgy, M. Auezov South Kazakhstan University, Shymkent 160012, KazakhstanBakhitzhan TaimasovDepartment of Silicate Technology and Metallurgy, M. Auezov South Kazakhstan University, Shymkent 160012, KazakhstanEkaterina PotapovaDepartment of Chemical Technology of Composite and Binding Materials, D. Mendeleev University of Chemical Technology of Russia, Moscow 125047, RussiaБ. К. СарсенбаевScientific Research Laboratory «Building Materials, Construction and Architecture», M. Auezov South Kazakhstan University, Shymkent 160012, KazakhstanMeiram BegentayevAdministration Rector’s Office, K.I. Satpayev Kazakh National Research Technical University, Almaty 050013, KazakhstanMukhtar DauletiyarovScientific Research Laboratory «Building Materials, Construction and Architecture», M. Auezov South Kazakhstan University, Shymkent 160012, KazakhstanAknur KuandykovaDepartment of Silicate Technology and Metallurgy, M. Auezov South Kazakhstan University, Shymkent 160012, KazakhstanAidana AbdullinDepartment of Silicate Technology and Metallurgy, M. Auezov South Kazakhstan University, Shymkent 160012, KazakhstanNurzhan AinabekovCentre for Scientific and Analytical Information, M. Auezov South Kazakhstan University, Shymkent 160012, KazakhstanSultan AuyesbekScientific Research Laboratory «Building Materials, Construction and Architecture», M. Auezov South Kazakhstan University, Shymkent 160012, Kazakhstan

2025en

ABI

Annotatsiya

A structure of composite cement with 15 wt.% thermally activated clay shales has been developed. The phase composition and properties of aluminosilicate rocks of the Kazakhstan deposits—Mynaral and Kuyuk—have been studied. It has been shown that aluminosilicates are related to clay shales by their composition. The regularities of thermal activation processes of aluminosilicates have been established, and it has been shown that pozzolanic activity increases for all compositions with an increase in the heat treatment temperature from 700 to 900 °C. The clay shale of the Mynaral deposit is characterized by the highest activity. The physicomechanical properties of the obtained composite cements–including Portland cement clinker, gypsum, and thermally activated clay shale—have been studied. It has been shown that when replacing up to 15 wt.% Portland cement clinker with thermally activated clay shales, there is no decrease in the strength properties of the composite cement. The obtained results allow us to consider heat-treated clay shales as active mineral additives.

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Identifikatorlar

DOI: 10.3390/jcs9060269

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