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Water-Resistant Clay and Slag Composite Materials of Autoclaved Hardening
https://orcid.org/http://orcid.org/0000-0002-6009-1149
https://orcid.org/http://orcid.org/0000-0002-4744-152X
https://orcid.org/http://orcid.org/0000-0001-9956-6941
https://orcid.org/http://orcid.org/0000-0001-7535-2113
The water resistance of autoclaved silicate materials can change in a wide range. The strength of calcium-silicate brick in the water can decrease up to 30%, which is explained by its high open porosity and possible content of some free hydrated lime, which on contact with water after some time passes into its soluble state, forming pores and cavities. The most water-resistant are dense silicate concretes, the cementing bond of which consists of hydrosilicates CSH (B), tobermorite, xonotlite. The paper considers clay-slag autoclaved composite materials, obtained with the use of steelmaking slaking slags and polymineral clay, of the following composition, wt%: slag—60; clay—40; lime—5, over 100%. As a water-repelling admixture the usage of oil-extracting industry waste kieselguhr sludge, generated at winterization stage of oil refining during oil clarification from waxes and wax-like impurities, was considered. Kieselguhr sludge contains 65% of organic matter, including 3.8% of vegetable waxes and wax-like substances, which provides it with hydrophobic properties. The findings have demonstrated that the optimal sludge content makes up 0.8% of solid components weight, which provides consistent strength and reduces water sorption and capillary suction of clay-slag autoclaved composite concrete samples almost by half in comparison with control samples of concrete without the additive. The operating principle of the sludge consists in leaching of amorphous silica, contained in diatomite, and its participation in low-basic hydrated calcium silicates synthesis in autoclaving conditions with the subsequent impregnation of the silicate matrix with the released hydrophobic components of sludge, which contain, among other substances, vegetable waxes and wax-like components.
Water-Resistant Clay and Slag Composite Materials of Autoclaved Hardening
https://orcid.org/http://orcid.org/0000-0002-6009-1149
https://orcid.org/http://orcid.org/0000-0002-4744-152X
https://orcid.org/http://orcid.org/0000-0001-9956-6941
https://orcid.org/http://orcid.org/0000-0001-7535-2113
The water resistance of autoclaved silicate materials can change in a wide range. The strength of calcium-silicate brick in the water can decrease up to 30%, which is explained by its high open porosity and possible content of some free hydrated lime, which on contact with water after some time passes into its soluble state, forming pores and cavities. The most water-resistant are dense silicate concretes, the cementing bond of which consists of hydrosilicates CSH (B), tobermorite, xonotlite. The paper considers clay-slag autoclaved composite materials, obtained with the use of steelmaking slaking slags and polymineral clay, of the following composition, wt%: slag—60; clay—40; lime—5, over 100%. As a water-repelling admixture the usage of oil-extracting industry waste kieselguhr sludge, generated at winterization stage of oil refining during oil clarification from waxes and wax-like impurities, was considered. Kieselguhr sludge contains 65% of organic matter, including 3.8% of vegetable waxes and wax-like substances, which provides it with hydrophobic properties. The findings have demonstrated that the optimal sludge content makes up 0.8% of solid components weight, which provides consistent strength and reduces water sorption and capillary suction of clay-slag autoclaved composite concrete samples almost by half in comparison with control samples of concrete without the additive. The operating principle of the sludge consists in leaching of amorphous silica, contained in diatomite, and its participation in low-basic hydrated calcium silicates synthesis in autoclaving conditions with the subsequent impregnation of the silicate matrix with the released hydrophobic components of sludge, which contain, among other substances, vegetable waxes and wax-like components.
Water-Resistant Clay and Slag Composite Materials of Autoclaved Hardening
https://orcid.org/http://orcid.org/0000-0002-6009-1149
https://orcid.org/http://orcid.org/0000-0002-4744-152X
https://orcid.org/http://orcid.org/0000-0001-9956-6941
https://orcid.org/http://orcid.org/0000-0001-7535-2113
The water resistance of autoclaved silicate materials can change in a wide range. The strength of calcium-silicate brick in the water can decrease up to 30%, which is explained by its high open porosity and possible content of some free hydrated lime, which on contact with water after some time passes into its soluble state, forming pores and cavities. The most water-resistant are dense silicate concretes, the cementing bond of which consists of hydrosilicates CSH (B), tobermorite, xonotlite. The paper considers clay-slag autoclaved composite materials, obtained with the use of steelmaking slaking slags and polymineral clay, of the following composition, wt%: slag—60; clay—40; lime—5, over 100%. As a water-repelling admixture the usage of oil-extracting industry waste kieselguhr sludge, generated at winterization stage of oil refining during oil clarification from waxes and wax-like impurities, was considered. Kieselguhr sludge contains 65% of organic matter, including 3.8% of vegetable waxes and wax-like substances, which provides it with hydrophobic properties. The findings have demonstrated that the optimal sludge content makes up 0.8% of solid components weight, which provides consistent strength and reduces water sorption and capillary suction of clay-slag autoclaved composite concrete samples almost by half in comparison with control samples of concrete without the additive. The operating principle of the sludge consists in leaching of amorphous silica, contained in diatomite, and its participation in low-basic hydrated calcium silicates synthesis in autoclaving conditions with the subsequent impregnation of the silicate matrix with the released hydrophobic components of sludge, which contain, among other substances, vegetable waxes and wax-like components.
Water-Resistant Clay and Slag Composite Materials of Autoclaved Hardening
Lecture Notes in Civil Engineering
Klyuev, Sergey Vasil'yevich (Herausgeber:in) / Klyuev, Alexander Vasil'yevich (Herausgeber:in) / Vatin, Nikolay Ivanovich (Herausgeber:in) / Sabitov, Linar S. (Herausgeber:in) / Makridina, Yu. L. (Autor:in) / Starostina, I. V. (Autor:in) / Lushnikov, A. S. (Autor:in) / Shevtsova, R. G. (Autor:in)
International Scientific Conference on Innovations and Technologies in Construction ; 2022 ; Belgorod, Russia
12.05.2023
10 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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