Highly Effective Water-repellent Concrete with Improved Physical and Technical Properties

Tkach, Evgeniya; Semenov, V. S.; Tkach, Semen; Rozovskaya, Tamara

doi:10.1016/j.proeng.2015.07.143

Cited by 38 publications

(23 citation statements)

References 6 publications

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“…This is because the cement grains are surrounded by a hydrophobic coating, which makes it difficult or impossible to hydrate the cement. Hence, this leads to the decrease in compressive strength and the loss of sample mass after freezing-thawing [6]. Admixture hydrophobic creates chemical bonds between the individual components of concrete, affecting the changes in the microstructure, as well as changing the strength parameters [30].…”

Section: Discussionmentioning

confidence: 99%

“…Hydrophobic treatment prevents wetting of the concrete's porous structure. A great number of organic additives have been studied as hydrophobic reagents including alkyl-alkoxy silane [5,6], surfactants [7,8], acrylic and polyurethane [6,9]. Concrete carbonation is a process in which carbondioxide reacts with calcium hydroxide [10][11][12] in the cement matrix to form calcium carbonate and water and the reaction stoichiometry is: Ca(OH) 2 + CO 2 → CaCO 3 + H 2 O.…”

Section: Introductionmentioning

confidence: 99%

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Hydrophobic Calcium Carbonate for Cement Surface

et al. 2017

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This report describes a novel way to generate a highly effective hydrophobic cement surface via a carbonation route using sodium stearate. Carbonation reaction was carried out at different temperatures to investigate the hydrophobicity and morphology of the calcium carbonate formed with this process. With increasing temperatures, the particles changed from irregular shapes to more uniform rod-like structures and then aggregated to form a plate-like formation. The contact angle against water was found to increase with increasing temperature; after 90 • C there was no further increase. The maximum contact angle of 129 • was obtained at the temperature of 60 • C. It was also found that carbonation increased the micro hardness of the cement material. The micro hardness was found to be dependent on the morphology of the CaCO 3 particles. The rod like structures which caused increased mineral filler produced a material with enhanced strength. The 13 C cross polarization magic-angle spinning NMR spectra gave plausible explanation of the interaction of organic-inorganic moieties.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hydrophobic Calcium Carbonate for Cement Surface

et al. 2017

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“…We analyzed the experience of using the common high-performance modifiers in aerated concrete production [15] and developed new compositions of complex organic mineral modifiers based on the industrial wastes listed below (Table 1). Water remaining *GM-SB -oil-in-water emulsion; GM-SBF -emulsion and suspension (paste); GM-SB plus STS and GM-SBF plus STS -dispersions with aqueous solutions of inorganic acid salts.…”

Section: Methodsmentioning

confidence: 99%

Production of environmentally friendly aerated concrete with required construction and operational properties

Tkach

Solovyov²,

Tkach

2018

MATEC Web Conf.

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Abstract. The purpose of these studies is to justify the feasibility of recycling different types of industrial waste instead of conventional expensive raw materials in production of environmentally friendly aerated concrete with required construction and operational properties. The impact of wastes from various industries on the environmental condition of affected areas, as well as the results of their environmental assessment were analyzed to determine whether these wastes could be used in production of high-performance building materials. The assessment of industrial wastes in aerated concrete production suggests that industrial wastes of hazard class IV can be recycled to produce aerated concrete. An environmentally friendly method for large-scale waste recycling, including a two-step environmentally sustainable mechanism, was developed. The basic quality indicators of the modified aerated concrete proved that the environmental safety could be enhanced by strengthening the structure, increasing its uniformity and improving thermal insulation properties. The modified non-autoclaved aerated concrete products with improved physical and operational properties were developed. They have the following properties: density -D700; class of concrete -В3.5; thermal transmittance coefficient -0.143 W/(m°С); frost resistance -F75.

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“…Температурный режим был определен от 55 °С. Такая температура позволяет полимеру ПВА эффективно снять парафиновую пленку с поверхности алюминиевой пудры [8,9].…”

Section: методы исследованияunclassified

Concrete Composition Properties Modified by Polymer Emulsion

Sabitov

Dusembinov

Bazarbayev

2020

Vestnik Tomskogo gosudarstvennogo arhitekturno-stroitelnogo uni

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В статье рассмотрены вопросы улучшения качества ячеистого бетона путем применения ряда технологических процессов, позволяющих значительно улучшить потенциал используемых компонентов и при этом получить материал с высокими качественными показателями.Проведены исследования композиционного газобетона с улучшенными физикомеханическими свойствами. Для получения высоких показателей качества в технологии применяли роторно-пульсационный аппарат, который, создавая высокочастотные колебания, сопровождающиеся кавитацией, обеспечил получение качественной эмульсии полимерного компонента и алюминиевой пудры. За счет качественного омыления газообразователь равномерно распределился по структуре раствора и вступил в реакцию с цементным вяжущим, создав равномерное поровое пространство. А полимерный компонент, обволакивая пору, обеспечил гидрофобность материала и усилил его прочность.Ключевые слова: газобетон; модификатор; полимерный компонент; морозостойкость; теплоизоляция; эмульсия; диспергатор.Для цитирования: Сабитов Е.Е., Дюсембинов Д.С., Базарбаев Д.О. Исследование свойств композиции бетона с использованием полимерной эмульсии // Вестник Томского государственного архитектурно-строительного университета.The paper deals with the quality of gas concrete by using a number of process technologies that can significantly improve the potential of the added components. The proposed technology for composite gas concrete production improves its physical-and-mechanical properties due to the use of a rotary-pulsation apparatus, which creates high-frequency vibrations accompanied by cavitation and produced a high-quality polymer emulsion and the aluminum powder. Due to high-quality saponification, the gasifier evenly distributes in the concrete paste structure and reacts with the cement binder, thereby creating a uniform pore space. And the polymer emulsion envelopes pores and improves the material hydrophobicity and strength.

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Highly Effective Water-repellent Concrete with Improved Physical and Technical Properties

Cited by 38 publications

References 6 publications

Hydrophobic Calcium Carbonate for Cement Surface

Hydrophobic Calcium Carbonate for Cement Surface

Production of environmentally friendly aerated concrete with required construction and operational properties

Concrete Composition Properties Modified by Polymer Emulsion

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