An investigation into age-dependent strength, elastic modulus and deflection of low calcium fly ash concrete for sustainable construction

Hashmi, A. Fuzail; Shariq, M.; Baqi, Abdul

doi:10.1016/j.conbuildmat.2021.122772

Cited by 51 publications

(18 citation statements)

References 22 publications

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“…In contrast, high-volume FA addition decreases the pozzolanic activity and inactive filler content of concrete increases. is slows the strength development and reduces E CM [59].…”

Section: Modulus Of Elasticity (Ecm) Ementioning

confidence: 99%

The Durability of High‐Strength Concrete Containing Waste Tire Steel Fiber and Coal Fly Ash

Ali

Yilmaz

Tahir

et al. 2021

Advances in Materials Science and Engineering

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The demands for high-strength concrete (HSC) have been increasing rapidly in the construction industry due to the requirements of thin and durable structural elements. HSC is highly brittle. Therefore, to augment its ductility behavior, expensive fibers are used. These negative drawbacks of HSC can be controlled by incorporating waste materials into its manufacturing instead of conventional ones. Therefore, this study assessed the performance of HSC produced with different quantities of waste tire steel fiber (WSF) and fly ash (FA). WSF was used at two doses, namely, 0.5% and 1%, by volume in HSC, with low-to-medium volumes of FA, that is, 10%–35%. The studied durability parameters included rapid chloride permeability (RCP) and chloride penetration depth (CPD) by immersion method (28 and 120 days) and acid attack resistance (AAR) (28 and 120 days). Various basic mechanical properties of HSC were also analyzed, such as compressive strength (fCM), modulus of elasticity (ECM), splitting-tensile strength (fCTM), and modulus of rupture (fCRM). The results revealed that the damaging effect of WSF on the RCP resistance of HSC is probably due to the high conductivity of steel fibers. However, test results of CPD showed that WSF produced insignificant changes in chloride permeability of HSC. Furthermore, when made with FA, WSF-reinforced HSC yielded very low chloride permeability. Both WSF and FA contributed to the improvement in the AAR of HSC. WSF was highly useful to tensile properties while it showed minor effects on compressive properties (fCM and ECM). Optimum ductility and durability can be achieved with HSC incorporating 1% WSF and 10%–15% FA.

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“…In contrast, high-volume FA addition decreases the pozzolanic activity and inactive filler content of concrete increases. is slows the strength development and reduces E CM [59].…”

Section: Modulus Of Elasticity (Ecm) Ementioning

confidence: 99%

The Durability of High‐Strength Concrete Containing Waste Tire Steel Fiber and Coal Fly Ash

Ali

Yilmaz

Tahir

et al. 2021

Advances in Materials Science and Engineering

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“…The testing operation of elastic modulus of concrete is complicated and consume a long time, which brings inconvenience to engineering practice. Many researchers [8][9][10][11] had carried out series experiments to establish mathematical models of the relationship between the elastic modulus and compressive strength of concrete, including power function and polynomial function models, and try to use compressive strength to predict the elastic modulus of concrete. In this paper, a power function equation was used to establish a compressive strength-elastic modulus model, as shown in equation (2).…”

Section: Elastic Modulusmentioning

confidence: 99%

Research on the influence of boulder powder content on concrete performance

Meng¹

2021

E3S Web Conf.

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To solve the problem of environmental pollution caused by the accumulation of granite powder and the shortage of traditional mineral admixtures, the influence of the amount of granite powder on the mechanical properties of concrete was studied by replacing cement with different amount of granite powder Different amount of granite powder can be used to prepare concrete with satisfactory performance. When the amount of granite powder is small (not more than 5%), granite powder will not reduce the compressive strength of concrete, or even slightly improve the compressive strength of pure cement concrete. When the amount of granite powder is more than 5%, the compressive strength of concrete will gradually decrease; when the amount of granite powder is more than 5%, the compressive strength of concrete will gradually decrease. The elastic modulus of concrete decreased, and the electric flux increased with the increase of the amount of admixture.

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“…The application of fly ash also improves the homogeneity of the concrete [17]. Moreover, fly ash, when used as a pozzolanic admixture, reacts with calcium hydroxide and forms a product similar in composition and properties to calcium silicate hydrate (C-S-H) [40,41]. In parallel, it follows a reduction in the pore interconnectivity of concrete, thus decreasing its permeability.…”

Section: Introductionmentioning

confidence: 99%

Fly Ash as an Ingredient in the Contaminated Soil Stabilization Process

Banaszkiewicz¹,

Marcinkowski²,

Pasiecznik³

2022

Energies

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Fly ash is the main by-product of coal combustion characterized by a large specific surface area. In addition to oxides, it also contains unburned coal and trace elements. This study aimed to investigate the possibility of using fly ash from pit-coal combustion (CFA) for the treatment of benzene-contaminated soil (S). The CFA was used as a mixture with Portland cement (PC) (70% PC + 30% CFA). The soil was treated with a PC-CFA mixture in amounts of 40, 60, and 80% of soil mass. During the process, the concentration of benzene was monitored with the flame-ionization detector. Produced monoliths (S+(PC-CFA)x) were tested for compressive strength and capillary water absorption. The experiment confirmed that the PC-CFA mixture limited benzene emission. The highest reduction in benzene concentration (34–39%) was observed for samples treated with the PC-CFA mixture in an amount of 80% (S+(PC-CFA)80). The average compressive strength of monoliths S+(PC-CFA)40, S+(PC-CFA)60, and S+(PC-CFA)80 was 0.57, 4.53, and 6.79 MPa, respectively. The water absorption values were in the range of 15–22% dm.

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An investigation into age-dependent strength, elastic modulus and deflection of low calcium fly ash concrete for sustainable construction

Cited by 51 publications

References 22 publications

The Durability of High‐Strength Concrete Containing Waste Tire Steel Fiber and Coal Fly Ash

The Durability of High‐Strength Concrete Containing Waste Tire Steel Fiber and Coal Fly Ash

Research on the influence of boulder powder content on concrete performance

Fly Ash as an Ingredient in the Contaminated Soil Stabilization Process

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