Influence of Fly Ash and Basalt Fibers on Strength and Chloride Penetration Resistance of Self-Consolidating Concrete

Mohamed, Osama Ahmed; Hawat, Waddah Al

doi:10.4028/www.scientific.net/msf.866.3

Cited by 33 publications

(13 citation statements)

References 11 publications

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“…Moreover, an increase in the tricalcium aluminate content of concrete increases the chloride binding capacity of concrete [10]. e inverse relationship between FA and RCP has also been observed past research [67]. A decrease in the electrical conductivity of concrete has also been reported with the addition of slag in the binder of HSC [43].…”

Section: Rapid Chloride Permeability (Rcp)supporting

confidence: 56%

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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Section: Rapid Chloride Permeability (Rcp)supporting

confidence: 56%

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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“…ANN models were developed to predict chloride penetration levels in concrete where the cement was partially replaced with various amounts of minerals including fly ash, silica fume, and slag as demonstrated in this paper. Experimental data on the influence of fly ash and basalt fibers on strength and chloride penetration resistance of SCC was presented by Mohamed and Al-Hawat [1]. Mechanical properties of SCC examined in this study, such as splitting tensile strength, were reported by Mohamed and Najm [2] and Mohamed et al [3].…”

Section: Introductionmentioning

confidence: 60%

Implementation of Artificial Neural Networks for Prediction of Chloride Penetration in Concrete

Mohamed¹,

Ati²,

Hawat³

2018

IJET

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Artificial Neural Networks (ANN) has received a great attention from researchers in previous decade to predict different aspect of engineering problems. The aim of this research is to present an implementation of ANN to predict the Chloride penetration of self-consolidating concrete (SCC), containing various amounts of cement replacement minerals including fly ash, silica fume, and slag. The ability of concrete to resist chloride penetration is measured using Rapid Chloride Penetration (RCP) test through an experimental program. One- and two-layer ANN models were developed by controlling the critical parameters affecting chloride penetration to predict the results of RCP test. The ANN models were developed using various parameters including ratio of water-to-binder (w/b), course aggregate, fine aggregate, fly ash, and silica fume. It was shown that the prediction accuracy of ANN models was sensitive to combinations of learning rate and momentum. Data used to train and test the ANN were obtained through an experimental program conducted by the authors.

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“…In general, the effect of basalt fibers on fresh and mechanical properties of concrete depends on the mechanical and geometric properties of the basalt fibers themselves, in addition to concrete mix constituents and additives. Studies have shown that in the presence of fly ash, a dosage of 1% basalt fibers by volume produced optimum results for concrete strength and resistance to chloride penetration resistance, compared to higher or lower dosages [ 38 ].…”

Section: Flexural Response and Contribution To Compression Forcesmentioning

confidence: 99%

Durability and Mechanical Properties of Concrete Reinforced with Basalt Fiber-Reinforced Polymer (BFRP) Bars: Towards Sustainable Infrastructure

2021

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Reducing the fingerprint of infrastructure has become and is likely to continue to be at the forefront of stakeholders’ interests, including engineers and researchers. It necessary that future buildings produce minimal environmental impact during construction and remain durable for as long as practicably possible. The use of basalt fiber-reinforced polymer (BFRP) bars as a replacement for carbon steel is reviewed in this article by examining the literature from the past two decades with an emphasis on flexural strength, serviceability, and durability. The provisions of selected design and construction guides for flexural members are presented, compared, and discussed. The bond of BFRP bars to the surrounding concrete was reportedly superior to carbon steel when BFRP was helically wrapped and sand coated. Experimental studies confirmed that a bond coefficient kb = 0.8, which is superior to carbon steel, may be assumed for sand-coated BFRP ribbed bars that are helically wrapped, as opposed to the conservative value of 1.4 suggested by ACI440.1R-15. Code-based models overestimate the cracking load for BFRP-reinforced beams, but they underestimate the ultimate load. Exposure to an alkaline environment at temperatures as high as 60 °C caused a limited reduction in bond strength of BFRP. The durability of BFRP bars is influenced by the type of resin and sizing used to produce the bars.

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Influence of Fly Ash and Basalt Fibers on Strength and Chloride Penetration Resistance of Self-Consolidating Concrete

Cited by 33 publications

References 11 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

Implementation of Artificial Neural Networks for Prediction of Chloride Penetration in Concrete

Durability and Mechanical Properties of Concrete Reinforced with Basalt Fiber-Reinforced Polymer (BFRP) Bars: Towards Sustainable Infrastructure

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