Properties of concrete incorporating alum sludge in different conditions as partial replacement of fine aggregate

Kaish, A. B. M. A.; Odimegwu, Temple Chimuanya; Zakaria, Ideris; Abood, Manal Mohsen; Nahar, Lutfun

doi:10.1016/j.conbuildmat.2021.122669

Cited by 21 publications

(14 citation statements)

References 20 publications

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“…Meanwhile, when the curing age progressed, the rate of increase was lower, and this behavior was also found with the quarry dust content in all replacement percentages. This agrees with the findings by Kaish et al [10], which indicate that the strength increase is mainly due to the effect of the particle fineness of the replacement materials which reduced the internal void in the concrete and yielded to an increase in concrete strength. The result for concrete produced with quarry dust showed an increase in compressive strength at all curing ages as replacement content increased; this behavior was different when compared with alum sludge.…”

Section: Compressive Strength Of Concretesupporting

confidence: 93%

“…Numerous studies have underscored the reliability of the nondestructive test in terms of assessing the mechanical properties of materials and existing building structures [7][8][9]. Correlation and prediction of compressive strength of materials or structures have been studied previously [3,4,10,11]. The results from these studies showed a good relationship between compressive strength and the nondestructive test values (UPV values and rebound hammer number) and can be useful in testing in situ compressive strength and prediction of the strength of structures.…”

Section: Introductionmentioning

confidence: 99%

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Nondestructive Determination of Strength of Concrete Incorporating Industrial Wastes as Partial Replacement for Fine Aggregate

Odimegwu

Kaish

Zakaria

et al. 2021

Sensors

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Schmidt rebound hammer test was employed in this study as a nondestructive test. This test method has been universally utilized due to its non-destructiveness for quick and easy assessment of material strength properties and quality of concrete of an existing structure. Industrial waste materials (air-dried alum sludge, treated alum sludge, limestone dust and quarry dust) were employed as replacement material for fine aggregates in this study. A normal strength concrete was designed to achieve 35 MPa at 28 days, with industrial waste materials replacing fine aggregate at different percentages (0%, 5%, 10% and 15%), and then cured for 7, 28 and 180 days. The compressive strength values and rebound numbers for all the mixes obtained were correlated, and a regression equation was established between compressive strength and Schmidt rebound number. The correlation result showed an excellent relationship between rebound number and compressive strength of concrete produced in this study at all curing ages, with correlation coefficients of R2 = 0.98, R2 = 0.99 and R2 = 0.98. The predicted equation showed a strong relationship with the experimental compressive strength. Therefore, it can be used for the prediction of compressive strength of concrete with industrial waste as a replacement for fine aggregate.

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Section: Compressive Strength Of Concretesupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Nondestructive Determination of Strength of Concrete Incorporating Industrial Wastes as Partial Replacement for Fine Aggregate

Odimegwu

Kaish

Zakaria

et al. 2021

Sensors

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“…The lowest masses were recorded for 3WTPS mortars. It is because this by-product has lower specific mass in relation to the natural fine sand (Table 1) [11,24]. From the experimental outcomes, it is possible to conclude that mortars with 3% WTPS in replacement of fine natural sand have similar behaviour to a reference sample when exposed to aggressive environments with CO2 and Cl -.…”

Section: Chloride Penetrationmentioning

confidence: 94%

Carbonation and chloride penetration of repair mortars with water treatment plant sludge and sugarcane bagasse ash sand

et al. 2022

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Water treatment plant sludge (WTPS) and sugarcane bagasse ash sand (SBAS) (wastes from water treatment and sugar/ethanol industries) can be used as replacements of natural sand in concrete. Thus, this paper aims to evaluate carbonation depth and chloride penetration of cementitious repair mortars produced with WTPS and SBAS. Three mortars compositions were analysed: plain reference sample (REF); sample with 3% of WTPS (3WTPS); and sample with 30% of SBAS (30SBAS). They were subjected to tests of accelerated carbonation and immersion in NaCl solution up to 84 days (12 weeks). The results showed that SBAS mortars had the best performance in relation to carbonation and chloride penetration tests. 3WTPS mortars had similar results to the reference sample. This is due to refinement of pores given by incorporation of fine waste materials making it difficult for aggressive agents to penetrate cement matrices. Therefore, 3WTPS and 30SBAS composites can be satisfactorily used in buildings repair services for more sustainable and durable construction.

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“…The results shows that the densities reduced with the addition of the BA ratio in the mortar mix. This behavior indicates that there is a decrease in the internal packing effect which failed to fill the internal void of the mortar specimens [43]. The change in density is linked to the change in porosity.…”

Section: Densitymentioning

confidence: 96%

“…In this experiment, the 15% BA mixture had the lowest density because BA has a much inferior specific gravity than cement and fine aggregate, thus reducing the mass per unit volume. The low specific gravity of BA and increasing BA content in the mix up to 10% results in the dust content in the mortar mix increasing, which results in a reduction in mortar density [43,45]. It was also stated that the higher quantity of the BA replacement of OPC by weight preceded an increase in paste volume, from which the density of BA was poorer than that of OPC, resulting in the lower density of the concrete [46].…”

Section: Densitymentioning

confidence: 99%

Utilization of Sugar Mill Waste Ash as Pozzolanic Material in Structural Mortar

et al. 2023

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Bagasse is produced as a waste in the sugar production process, which is used as fuel to stoke boilers in the sugar mills. The concluding product of this burning is residual sugarcane bagasse ash (BA), which is normally dumped or used as low-quality fertilizer. The ash for this study was collected from a reputed sugar mill located in the northern region of Bangladesh. Type I Portland cement (PC) was partially replaced with that finely ground bagasse ash without any pretreatment. The ground BA was used as a replacement for Portland cement at 5, 10, 15, 20, 25 and 30% of BA, respectively, in structural mortar. In addition, chemical characterization, specific gravity, X-ray diffraction (XRD), scanning electron microscopy (SEM), setting time, a strength activity index, compressive strength, water absorption, density and durability in a chloride environment of mortar were determined. The strength activity index result indicates that the used BA has the pozzolanic properties to be used as a partial cement replacement. The results showed that, at the age of 56 days, the mortar samples containing 5–15% ground bagasse ash had higher compressive strengths than the control mixture (mortar without ground bagasse ash). Mortar containing 15% ground bagasse ash had the highest mechanical and durability properties. Therefore, the substitution of 15% BA is acceptable for producing good quality structural mortar in the civil engineering construction field except in chloride environments.

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Properties of concrete incorporating alum sludge in different conditions as partial replacement of fine aggregate

Cited by 21 publications

References 20 publications

Nondestructive Determination of Strength of Concrete Incorporating Industrial Wastes as Partial Replacement for Fine Aggregate

Nondestructive Determination of Strength of Concrete Incorporating Industrial Wastes as Partial Replacement for Fine Aggregate

Carbonation and chloride penetration of repair mortars with water treatment plant sludge and sugarcane bagasse ash sand

Utilization of Sugar Mill Waste Ash as Pozzolanic Material in Structural Mortar

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