Thermal, Physico-Chemical, and Mechanical Behaviour of Mass Concrete with Hybrid Blends of Bentonite and Fly Ash

Ahad, Muhammad; Ashraf, Muhammad; Kumar, Rabinder; Ullah, Mukhtar

doi:10.3390/ma12010060

Cited by 24 publications

(12 citation statements)

References 18 publications

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“…Such a massive strength reduction is in accordance with rise in porosities, as well as with the nature of raw material. The minor or major decrease of compressive strength due to the bentonite (or montmorillonite respectively) was observed also by other researchers [8,12,13]. However, from the achieved results and the huge drop of mechanical strengths, it can be assumed, that not even 10% of bentonite acted as pozzolanic material, and its application in this way is not suitable.…”

Section: Mechanical Parametersmentioning

confidence: 72%

Mechanical properties of concrete for radioactive waste repositories

et al. 2019

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Concrete casing for radioactive repositories have to meet many strict requirements. One of the most important is a radiation protection and a radionuclide inhabitation. Bentonite, with a great sorption capacity, seems to be a suitable material for this purpose. Therefore, the main aim of this study was to assess an impact of the bentonite utilization as a component in concrete mixtures. For this reason, basic physical properties and mechanical parameters of concretes containing different amount of bentonite were determined. Bentonite applications led to the open porosity growth, while the matrix densities were not influenced. Regarding the mechanical parameters, the compressive strengths as well as the flexural strengths were significantly deteriorated by the bentonite application. Despite the presented negative effect, the obtained results seems to prove a possible applicability of a lower percentage of bentonite in concrete structures not as a cement replacement, but just as a component.

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Section: Mechanical Parametersmentioning

confidence: 72%

Mechanical properties of concrete for radioactive waste repositories

et al. 2019

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“…It is one of the widely using pozzolanic materials in construction industry [3]. The performance of fresh and hardened properties of concrete will enhance by incorporation of fly ash in concrete [4]. Fly ash will not be generated once the thermal power plants is permanently shutdown.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Calcined Bentonite Caly Utilization in Cement Mortar using Response Surface Methodology

Reddy

2021

IJE

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Discovery of alternative to the pozzolanic materials generated from industrial wastes was needed because of its unavailability when the industries was shutdown permanently. This paper deals the optimization of calcined bentonite clay utilization in cement mortar using response surface methodology (RSM). The variables were taken as three levels of calcination temperature (room temperature, 700 0 C and 800 0 C) and seven levels of calcined bentonite (0%, 5%, 10%, 15%, 20%, 25% and 30%). The compressive strength, workability, strength activity index and sorpitivity were taken as responses. The fresh and hardened properties of all determined for all mixes. Design Expert 11.0 version was utilized to carried out modelling and optimization using RSM. Workability was decreased upon increasing the calcination temperature and bentonite content in cement mortar. This attributed to high water absorption capacity of bentonite. The peak compressive strength was displayed by 20% replaced bentonite calcined at 800 0 C cement mortar after 28 days curing. Strength activity was improved upon increasing the percentage of bentonite calcined at 800 0 C. The sorpitivity of cement mortar was improved by incorporation of bentonite calcined at 800 0 C. The generated models from RSM were significance in all the factors considered. Optimum performance of the responses was observed at 15.25 % bentonite substitution calcined at 800 0 C

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“…Studies showed that fly ash is a potential and versatile adsorbent for wastewater [ 5 , 6 ] and the removal of pollutants, such as dyes from aqueous solutions [ 7 , 8 ]. From a chemical structure point of view, fly ash is aluminosilicate layered [ 9 , 10 ]. Abundant hydrophilic hydroxyls are decorated on its surface, and a large number of exchangeable cations are located between interlayers, which give fly ash excellent dispersibility in aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Applications of Salt-Resistant Superabsorbent Poly (Acrylic Acid-Acrylamide/Fly Ash) Composite

et al. 2019

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Solution polymerization synthesized alt-resistant superabsorbent poly (acrylic acid-acrylamide/fly ash) composites. The mass ratio of acrylic acid (AA) to acrylamide (AM), the concentration of crosslinker, the neutralization degree (ND) of AA, and the polymerization temperature were investigated by single-factor method. Optimized conditions for the synthesis of poly (acrylic acid-acrylamide/fly ash) (PAA-AM/FA) are, as following: m (AA)/m (AM) is 1.5, the content of crosslinker N, N-methylenebisacrylamide. (MBA) is 0.7%, neutralization degree of AA is 70%, polymerization temperature is 70 °C, and fly ash (FA) content is 50%. The prepared PAA-AM/FA demonstrated superior water absorption performance. The absorption capacities of PAA-AM/FA for pure water and 0.9% NaCl solution were found to be 976 g·g−1 and 81 g·g−1, respectively. Furthermore, PAA-AM/FA was found to have excellent adsorption capacity (148 mg·g−1) for Rhodamine B in water. Fourier Transform-Infrared Spectroscopy (FT-IR), Thermogravimetric Analysis (TGA), and Scanning Electron Microscopy (SEM) characterized the prepared materials. Results showed that fly ash was incorporated into the macromolecular polymer matrix and played a key role in improving the performance of the polymer composites.

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Thermal, Physico-Chemical, and Mechanical Behaviour of Mass Concrete with Hybrid Blends of Bentonite and Fly Ash

Cited by 24 publications

References 18 publications

Mechanical properties of concrete for radioactive waste repositories

Mechanical properties of concrete for radioactive waste repositories

Optimization of Calcined Bentonite Caly Utilization in Cement Mortar using Response Surface Methodology

Preparation and Applications of Salt-Resistant Superabsorbent Poly (Acrylic Acid-Acrylamide/Fly Ash) Composite

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