Granite Powder vs. Fly Ash for the Sustainable Production of Air-Cured Cementitious Mortars

Chajec, Adrian

doi:10.3390/ma14051208

Cited by 40 publications

(10 citation statements)

References 46 publications

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“…Currently, intensive research on various modifications of concretes is being carried out all over the world, e.g., with the use of: nanotechnology and nanomaterials [1][2][3], wastes [4][5][6], pozzolanic additives [7][8][9] and materials with special properties [10][11][12]. Such activities are mainly aimed at creating new composites, which would be the sustainable materials [13,14]. However, the desire to create sustainable concrete requires manufacturers, technologists and scientists to conduct continuous research in the field of changing the components of concrete mixes in such a way as to obtain building materials that are as environmentally friendly as possible.…”

Section: Introductionmentioning

confidence: 99%

Rheology of Cement Pastes with Siliceous Fly Ash and the CSH Nano-Admixture

Szóstak

Golewski

2021

Materials

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The use of fly ash in cement composites adversely affects its mechanical properties during the first days of mixture curing. Modern technology, in the form of an admixture containing the hydrated calcium silicates, allows to accelerate the hardening and binding process of concrete. In this paper, studies on the influence of the admixture on properties of concretes with the ordinary Portland cements (OPC) containing the addition of siliceous fly ash (FA) have been carried out. As part of the experimental research, the authors conducted a series of studies for cement pastes modified with the addition of FA and the CSH nano-admixture (NA). In order to compare the mixtures, the following tests of cement pastes were carried out: the compressive and flexural strength, heat of hydration, SEM and rheological shrinkage. The mechanical parameters were tested after 4, 8, 12 and 24 h. The hydration heat test and microstructure analysis were carried out during the first 24 h of the concrete curing. All tests were carried out on the standard samples. On the basis of the heat of hydration test, much higher hydration heat was found in mixtures modified with the NA. During the shrinkage test, a positive effect of the NA was observed—the shrinkage during the first 28 days of mixture curing was lower than in the reference samples. The application of the CSH nano-admixture to cement pastes with the addition of FA has brought positive effects. Apart from a significant increase in strength in the first 24 h of mixture curing, a reduction in the rheological shrinkage was observed. The admixture can be successfully used in the ash concretes, in which a higher early strength is required.

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Section: Introductionmentioning

confidence: 99%

Rheology of Cement Pastes with Siliceous Fly Ash and the CSH Nano-Admixture

Szóstak

Golewski

2021

Materials

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“…It has a direct impact on the fundamental pavement performance characteristics such strength, temperature stability, and mixture strength in the presence of water. Understanding the mechanisms dictating how granite and asphalt interact is essential for improving the performance of the mixture [5]. Granite powder's chemical makeup is displayed in Table 2.…”

Section: Granite Powder (Gp)mentioning

confidence: 99%

A Review of Properties of Bituminous Mix Containing Bitumen Modified with Cigarette Buds, Steel Slag, and Granite Powder

-¹,

-²

2022

IJFMR

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Researchers have been focusing on a potential and stable solution for the top-notch environmental issue of pollution by imperishable waste products such as Cigarette Buds (CB), Steel Slag (SS) and Granite Powder (GP). The recycling of cigarette buds is not possible due to throwing away in the random manner. Cigarette buds are harmful for the environment because it consists of cellulose acetate fibers, burnt tobacco and tar in addition to multiple toxic chemicals. Depending upon the geographic and environmental conditions, it takes a large amount of time to biodegrade this waste which eventually contaminate the environment if left unattended. Therefore, CB could be utilized as a potential replacement of bitumen. On the other hand, natural resources such as aggregates and fillers form the important constituents of bituminous mix. Due to the significant industrial development, waste deposits (SS and GP) have increased in recent years. SS is metallurgical and waste material of steel industry & GP is a waste material of granite polishing industry, when used as a partial replacement of natural aggregate and lime respectively gives satisfactory results. Therefore, partial replacement of these elements with SS and GP respectively, would be a great solution towards the reduction of environmental impacts of road construction. In this study, a detailed review of different properties of modified bitumen and resulting mix containing CB, SS and GP has been presented. The properties of bituminous mix considered for review are density, penetration, softening point, viscosity, Marshall test parameters, rutting, indirect tensile strength, and modulus of rupture.

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“…On the other hand, the research concerning the impact of fly ash (FA) as one of the most commonly used SCMs in cementitious mixes and curing conditions on fracture toughness and the cracking mechanism in concrete has indicated that it is possible to make sustainable green concrete with the addition of fly ash with high mechanical properties. On the other hand, fly ash decreases the early age strength of concrete and that the curing conditions have a significant impact on the properties of concrete with FA [15][16][17]. Moreover, it is noted that FA which has become a useful material that is used in the production of cementitious mixtures is no longer considered a waste [18].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Basalt Aggregates and Mineral Admixtures on the Mechanical Properties of Concrete Exposed to Sulphate Attacks

et al. 2022

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In this study, basalt, which is common around Diyarbakır province (Turkey), is used as concrete aggregate, waste materials as mineral additives and Portland cement as binding material to prepare concrete mixes. This paper aims to determine the proper admixture levels and usability of Diyarbakır basalt in concrete mixtures based on mechanical, physical and chemical tests. Thus, in order to determine the strength and durability performance of concrete mixtures with Diyarbakır basalt as aggregate, 72 sample cubes of 150 mm were prepared in three groups: mineral-free admixture (MFA), 10% of cement amount substituted for silica fume (SFS) and 20% for fly ash (FAS) as waste material. The samples were exposed to water curing and 100 g/L sulphate solution to determine the loss in weight of the concrete cubes and compressive strength was examined at the end of 7, 28 and 360 days of the specimens. Analysis of the microstructure and cracks that influence durability, were also performed to determine effects of sulphate attacks alkali-silica reactions on the specimens using scanning electron microscopy (SEM). A loss in weight of the concrete cubes and compressive strength was distinctly evident at the end of 56 and 90 days in both acids.

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Granite Powder vs. Fly Ash for the Sustainable Production of Air-Cured Cementitious Mortars

Cited by 40 publications

References 46 publications

Rheology of Cement Pastes with Siliceous Fly Ash and the CSH Nano-Admixture

Rheology of Cement Pastes with Siliceous Fly Ash and the CSH Nano-Admixture

A Review of Properties of Bituminous Mix Containing Bitumen Modified with Cigarette Buds, Steel Slag, and Granite Powder

The Effect of Basalt Aggregates and Mineral Admixtures on the Mechanical Properties of Concrete Exposed to Sulphate Attacks

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