A study of the permeability and acid attack of corn cob ash blended cements

Adesanya, D.A.; Raheem, Akeem Ayinde

doi:10.1016/j.conbuildmat.2009.02.001

Cited by 113 publications

(77 citation statements)

References 9 publications

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“…Besides, due to the long-term strength development of CCA-blended cement concrete and the low heat of hydration recorded (Adesanya and Raheem 2010), this study also confirms the presumption that it is suitable for CCA to be used as a structural and building material. Therefore, the properties and behaviour of CCA can be more favourable for applications in mass concrete works.…”

Section: Potential Applications Of Ccasupporting

confidence: 76%

“…There are also many studies focused on the utilization of biomass ash in various fields, for example, as a raw material for ceramic products (Abraham et al 2013), as an adsorbent (Vassilev et al 2013;Maneerung et al 2016), as a potential source of SiO2 (Terzioglu and Yucel 2012;Terzioglu et al 2013), as a construction and building material (Adesanya and Raheem 2010), as a soil amendment (Umamaheswaran and Batra 2008;Pan and Eberhardt 2011), and as a source for potash production (Ogundiran et al 2011). However, research on the physicochemical properties of CCA obtained from biomass gasification plants is limited, and its physicochemical behavior remains uncertain.…”

Section: Introductionmentioning

confidence: 99%

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Physicochemical Properties and Possible Applications of Waste Corncob Fly Ash from Biomass Gasification Industries of China

Yao¹,

Xu²,

Li³

2016

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As a by-product generated from the processing of corn, the production in China of corncob (CC) is abundant, with up to 3.87 million tons per year. The biomass gasification industries make use of the CC residue as feedstock, but large volumes of generated corncob ash (CCA) requires daily disposal. In this study, CCA was characterized by laser particle size analyzer (LPSA), X-ray fluorescence (XRF), X-ray diffraction (XRD), thermal gravimetric and differential thermal analysis (TG-DTA), scanning electron microscopy, and energy dispersive X-ray (SEM-EDX). XRF results showed that the CCA was rich in K, Ca, and P, indicating its potential as a soil amendment. High content of SiO2 in CCA revealed its potential as a pozzolan in blended cement concrete. XRD showed the presence of crystal phases such as potassium carbonate, sylvite, arcanite, quartz, calcite, and nitrite. SEM images revealed the high agglomeration of CCA. EDX gave evidence of the external surface of agglomerated particles coated with KCl. TG-DTA analysis indicates that decomposition of CCA has stepwise mechanism. The CCA powders through a 0.154 mm sieve showed a high specific surface area of 162.32 m 2 /g, average pore size of 12.17 Å with pore volume of 0.116 cm 3 /g. The carbon residue separated from CCA has the potential to be used as activated carbon.

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Section: Potential Applications Of Ccasupporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Physicochemical Properties and Possible Applications of Waste Corncob Fly Ash from Biomass Gasification Industries of China

Yao¹,

Xu²,

Li³

2016

BioResources

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“…But, it is worth considering that chlorides can be introduced to concrete made with CCA-blended cement, which is a critical problem for the reuse as a raw material in cement due to the primary corrosion of steel reinforcement caused by chloride attack. In a previous study (Adesanya and Raheem 2010), the influence of chloride attacks on the permeability of CCA-blended cement was evaluated. Besides, the reaction of blended cement mortar specimens with HCl acid water (mix proportions 1:1, 1:2, and 1:3 by weight) was also studied in-depth, and their results indicated that the incorporation of CCA could improve the resistance of concrete to chloride attack.…”

Section: Chemical and Phase Analysis Of Ccamentioning

confidence: 99%

Research on the Thermo-Physical Properties of Corncob Residues as Gasification Feedstock and Assessment for Characterization of Corncob Ash from Gasification

Yao

Liang

2016

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Harnessing energy from biomass is environmentally friendly because of the essentially zero net CO2 impact. As a common agricultural byproduct, corncobs are abundant in quantity. This study was carried out to examine the thermo-physical properties of corncobs and characterize the properties of corncob ash produced from gasification, in order to provide a basis for transforming it into value-added products. The results showed that the pyrolysis of corncobs followed a three-step, stepwise mechanism. Activation energies calculated by the Coats-Redfern method at heating rates of 5, 10, and 20 °C/min were 79.08, 76.73, and 75.78 kJ·mol -1 , respectively, implying that the corncobs could be decomposed easily at high heating rates. The emissions of CO, CO2, CH4, H2, H2O, and O2 during pyrolysis corresponded well with thermal curves. Corncob ash could be a good fertilizer because of its high contents of K, P, and Ca. The high SiO2 content makes the corncob ash suitable for ceramics and blended cement concrete. Sylvite (KCl) and quartz (SiO2) were the two major crystal phases in the corncob ash. Relatively large particles of unburnt carbon residues in the ash indicated that low-cost adsorbent could be developed from these carbon residues.

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“…Since corn cob is generally considered an agricultural waste, an interesting economic and sustainable benefit may be achieved through this proposed technological solution. Within the authors' knowledge the utilization of corn cob in concrete is quite novel, and the only known use is that of corn cob ash in blended cement concretes [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Corn cob lightweight concrete for non-structural applications

Pinto

Vieira

Pereira

et al. 2012

Construction and Building Materials

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This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. a b s t r a c tA lightweight concrete using granulated corn cob (without corn) as an aggregate is proposed in this research work. Taking into account that corn cob, after extracting the corn, is generally considered an agricultural waste, an interesting economic and sustainable benefit may result by using it as a building material. Therefore, it can be an alternative sustainable lightweight aggregate solution in comparison to the most currently applied ones such as expanded clay, particles of cork, particles of expanded polystyrene (EPS), among others. The density, the compressive strength and the thermal insulation properties of a corn cob concrete were experimentally quantified. An expanded clay concrete was also studied as reference. The main results obtained are presented and discussed showing that the proposed corn cob concrete may have the adequate material properties required for a lightweight concrete for non-structural application purposes.

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A study of the permeability and acid attack of corn cob ash blended cements

Cited by 113 publications

References 9 publications

Physicochemical Properties and Possible Applications of Waste Corncob Fly Ash from Biomass Gasification Industries of China

Physicochemical Properties and Possible Applications of Waste Corncob Fly Ash from Biomass Gasification Industries of China

Research on the Thermo-Physical Properties of Corncob Residues as Gasification Feedstock and Assessment for Characterization of Corncob Ash from Gasification

Corn cob lightweight concrete for non-structural applications

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