Modified Aerated Concrete Based on Man-Made Waste

Tkach, Evgeniya

doi:10.21660/2022.97.3334

Cited by 2 publications

(2 citation statements)

References 16 publications

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“…Highly mineralized carbonaceous rocks were previously ground to a particle size smaller than 0.125 mm and introduced into mixtures in an amount of 4-12% (compositions 1-3, Table 13). The mechanism of the impact of carbonaceous rocks on the rheological properties of the masses was that the resin and bitumen substances present in these rocks gave rise to coagulation phenomena in the masses and provided a homogeneous and more plastic mass due to the ability of the clay components of siltstone-argillite rocks to emulsify "resin-water" and "bitumen-water" systems as a result of wetting and sticking [38,39].…”

Section: Formation Of Crystallization Structure During the Firing Of ...mentioning

confidence: 99%

Strong Structure Formation of Ceramic Composites Based on Coal Mining Overburden Rocks

et al. 2023

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Currently, the amount of man-made waste worldwide is steadily increasing. It is, therefore, necessary to constantly look for effective ways of utilization and recycling. It is also necessary to reduce the use of non-renewable resources and reduce the impact on the environment. The use of coal industry waste is currently quite insignificant, amounting to some 10% of the total volume. The work aimed to study the properties of raw materials and study the processes of structure formation during the forming, drying, and firing of composite ceramic produced using overburden rock and additives. The work’s relevance lies in the need to solve environmental, economic, and technological problems related to the utilization of coal mining waste. Experiments of the past prove the possibility of using the waste coal industry as additives in the production of building materials. The article presents the results of studies of the chemical, mineralogical, and granulometric composition of overburden rock in coal mining. Peculiarities of structure formation during the forming, drying, and firing of ceramic composites based on optimal fractional compositions from coal-mine overburden were revealed. Organic and chemical additives were used for the correction of technological properties and improvement of the quality of finished composite products. The physical and mechanical indices of the obtained composite ceramic samples were determined, the analysis of which revealed that the use of highly mineralized carbonaceous rocks as solid additives provided a 2–2.5-fold increase in the strength of the product, 5.6% reduction in water absorption, and an increase in the product frost resistance by 20–25 cycles. The aluminum oxychloride influence on the physical and mechanical indices of the obtained composite articles was reflected in a reduction in their water absorption from 8.2 to 7.0%, a 10–12% increase in strength in compression, and an increase in freeze–thaw resistance by 30–35 cycles. Research results proved that the composition and properties of coal-mine overburden rock are close to those of conventional clays. With special technological preparation, they can be used for the production of composite ceramic products. This will significantly reduce the cost of bricks, to make up for the shortage of high-grade clay raw materials and improve the environmental situation. Nevertheless, further research into the use of coal-mine overburdens in the composite ceramic material technology is warranted.

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Section: Formation Of Crystallization Structure During the Firing Of ...mentioning

confidence: 99%

Strong Structure Formation of Ceramic Composites Based on Coal Mining Overburden Rocks

et al. 2023

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“…In their article, metakaolin was used in an amount of 5-20% by weight of cement [15]. It is known that additives of mineral origin should be used in combination with water-reducing additives to reduce the water-cement ratio and ensure the necessary mobility of the mixture [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

The Influence of a Complex Additive on the Strength Characteristics of Concrete for Road Construction

Rakhimova

2023

GEOMATE

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Intensive traffic and the rapid growth of the use of motor vehicles necessitate the construction of the most durable roads possible. In this regard, roads made of cement concrete have a number of advantages in comparison with asphalt roads. In the Republic of Kazakhstan, at the moment, it is urgently required to improve the quality of roads. Road concrete works in difficult operating conditions may lead to significant deterioration of its properties (characteristics). To increase the durability of cement concrete coatings and obtain high-strength concrete, there are chemical additives and special-purpose fillers. It is also possible to apply surface treatments to the exposed concrete surfaces. In turn, fillers and additives improve the grain composition, microstructure and reduce the porosity of concrete. In this article, modern additives such as metakaolin, wollastonite and superplasticizer were used to improve the strength of concrete. As a result of the research, it was determined that the use of metakaolin (15% of the cement weight) in combination with a superplasticizer increases the compressive strength of concrete from 40.45 MPa to 54.7 MPa. We also studied the addition of a dispersed filler -wollastonite, which allowed us to achieve an increase in strength up to 40% of the original value. The use of pre-treated water in the electrolyzer was investigated and found to achieve up to 1.5 times increase in strength. Thus, the claimed modified concrete mixture with metakaolin has high strength indicators and has an additional dispersed filler in its composition.

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Modified Aerated Concrete Based on Man-Made Waste

Cited by 2 publications

References 16 publications

Strong Structure Formation of Ceramic Composites Based on Coal Mining Overburden Rocks

Strong Structure Formation of Ceramic Composites Based on Coal Mining Overburden Rocks

The Influence of a Complex Additive on the Strength Characteristics of Concrete for Road Construction

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