Effect of Volcanic Ash Incorporation on the Mechanical Properties and Surface Morphology of Hydrated Cement Paste

Al-Bahar, S.; Chakkamalayath, J.; Joseph, Antony; Al-Otaibi, Saud; Alaibani, Anfal

doi:10.1061/(asce)mt.1943-5533.0001886

Cited by 25 publications

(6 citation statements)

References 26 publications

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“…Current studies show that volcanic ash from Saudi Arabia can be an excellent SCM for up to 30% substitution of Portland cement [23][24][25]. This volcanic ash is rich in aluminosilicate and possesses pozzolanic properties.…”

Section: Introductionmentioning

confidence: 99%

Hydration kinetics and morphology of cement pastes with pozzolanic volcanic ash studied via synchrotron-based techniques

et al. 2017

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This study investigates the early stages of hydration behavior when basaltic volcanic ash was used as a partial substitute to Ordinary Portland Cement (OPC) using Ultra-small-angle X-Ray Scattering (USAXS) and Wide Angle X-Ray Scattering (WAXS). The mix design consisted of 10, 30 and 50% substitution of Portland cement with two different sized volcanic ashes. The data showed that substitution of volcanic ash above 30% results in excess un-reacted volcanic ash, rather than additional pozzolanic reactions along longer length scales. WAXS studies revealed that addition of finely ground volcanic ash facilitated Calcium-Silicate-Hydrate (C-S-H) related phases, whereas inclusion of coarser volcanic ash caused domination by Calcium-Aluminum-Silicate-Hydrate (C-AS -H) and unreacted MgO phases, suggesting some volcanic ash remained unreacted throughout the hydration process. Addition of more than 30% volcanic ash leads to coarser morphology along with decreased surface area and higher intensity of scattering at early age hydration. This suggests an abrupt dissolution indicated by changes in surface area due to the retarding gel formation that can have implication on early age setting influencing the mechanical properties of the resulting cementitious matrix. The findings from this work show that the concentration of volcanic ash influences the specific surface area and morphology of hydration products during the early stage of hydration. Hence, natural pozzolanic volcanic ashes can be a viable substitute to Portland cement by providing environmental benefits in terms of lower carbon foot print along with long term durability.

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Section: Introductionmentioning

confidence: 99%

Hydration kinetics and morphology of cement pastes with pozzolanic volcanic ash studied via synchrotron-based techniques

et al. 2017

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“…The natural pozzolana, in the form of volcanic ash (VA), was obtained from Jeddah, Saudi Arabia. The basic physical and chemical characteristics of the samples of VA were determined and compared with the previous studies (Al-Bahar et al 2017;Al-Fadala et al 2017). The solid content, pH, and specific gravity of the SP and VMA were determined according to ASTM C 494-2013.…”

Section: Methodsmentioning

confidence: 99%

“…Several studies have been reported about the strength and durability properties of VC and SCC with binary and ternary blends of fly ash, slag and silica fume (Gettu et al 2002;Grdic et al 2010;Kou Shi-Cong et al 2011;Jawahar et al 2013 a, b;Behera et al 2014;Pereira-de-Oliveira et al 2014;Celik et al 2014). Also, a recent research study conducted at the author's institute had validated the potential of using regionally available volcanic ash as an alternative supplementary cementitious material in concrete (Al-Bahar et al 2017;Al-Fadala et al 2017). A similar study on the performance evaluation on the strength and durability of VC and SCC with sustainable materials such as volcanic ash and recycled coarse aggregates was carried out in the first stage of this study, and the details were reported earlier (Chakkamalayath et al 2018;Chakkamalayath et al 2020).…”

Section: Exportsmentioning

confidence: 99%

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Cost-Benefit Analysis of Vibrated Concrete and Self–Compacting Concrete Containing Recycled Aggregates and Natural Pozzolana

Abdulmalek¹,

Chakkamalayath

2022

JER is an international, peer-reviewed journal that publishes f

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The use of vibrated concrete (VC) and self–compacting concrete (SCC) with adequate strength, cost-effectiveness, and sustainability is required to meet the current requirements in the concrete industry. Therefore, the development of an economical and durable concrete while comparing the life cycle cost of the structures, which includes the initial cost of the material, labor, and the cost of maintenance and repair, is of prime importance. The prevailing cost of materials and labor from the local market was collected to calculate the total cost of the concrete mixes. Both vibrated concrete and self–compacting concrete mixes containing conventional materials as well as locally and regionally available materials were developed, and a decision matrix was used for the cost-benefit analysis. The cost analysis of different mixes showed the economic benefit of self–compacting concrete compared to vibrated concrete, and further confirmed the added advantage of incorporating volcanic ash (VA) and recycled coarse aggregates (RCA) for the economic development of concrete mixes.

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“…[7][8][9][10][11] However few studies have been reported on the application of natural pozzolana in the form of volcanic ash (VA) for the production of vibrated cement concrete VCC as well as self-compacting concrete SCC. [12][13][14] Due to the larger demand for plastics for various applications, many polymer processing industries face difficulties in disposing of huge volumes of waste materials. Dumping plastic waste into the environment by domestic and landfills is considered a major challenge.…”

Section: Introductionmentioning

confidence: 99%

Production of Plastic Cement Concrete from PVC Waste

Kindi¹,

Devi²,

Abri

et al. 2021

Fine Chemical Engineering

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The disposal of plastic wastes into the environment is a serious concern due to its limited biodegradability and production in excess quantity. The accumulation of enormous volumes of plastic waste is considered to be a major pollution problem and it is essential to find an alternate method to address such issues in an environmental-friendly and cost-effective way. The current research focused on the production of plastic cement concrete from waste polyvinyl chloride (PVC) generated from a polymer processing industry in varying proportions, and to modify the concrete properties. Polyvinyl chloride was partially replaced with Ordinary Portland Cement (OPC) by varying its compositions from 15% to 35% by weight (i.e. 15%, 20%, 25%, 30% and 35% OPC). The curing period was kept for 7 days after casting process. The produced plastic cement concrete was tested for compressive strength through Universal Testing Machine (UTM). Density and water absorption tests were also carried out on hardened concrete to assess the application of plastic cement concrete as a building material. The other characterization techniques employed are Fourier Transform Infrared Spectroscopy (FTIR) and X-Ray Diffraction (XRD) analyses. It was observed that up to 15% by weight of polyvinyl chloride could be replaced with OPC which exhibited higher compressive strength (19.25 MPa) compared to other mix proportions. A maximum density of 2.051 g/cm3 was obtained at a concrete mix composition corresponding to 25% replacement. The maximum water absorption percentage (5.86%) was observed at 35% plastic waste replacement. The studies demonstrate that the waste plastic material is considered to be a cost-effective, viable and sustainable way of reducing the environmental pollution.

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Effect of Volcanic Ash Incorporation on the Mechanical Properties and Surface Morphology of Hydrated Cement Paste

Cited by 25 publications

References 26 publications

Hydration kinetics and morphology of cement pastes with pozzolanic volcanic ash studied via synchrotron-based techniques

Hydration kinetics and morphology of cement pastes with pozzolanic volcanic ash studied via synchrotron-based techniques

Cost-Benefit Analysis of Vibrated Concrete and Self–Compacting Concrete Containing Recycled Aggregates and Natural Pozzolana

Production of Plastic Cement Concrete from PVC Waste

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