A Sustainable Environmental Study on Corn Cob Ash Subjected To Elevated Temperature

Singh, Karandeep; Singh, Jaspal; Kumar, Sarvesh

doi:10.12944/cwe.13.1.13

Cited by 14 publications

(7 citation statements)

References 10 publications

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“…The optimum blend was obtained at 10% CCA and 90% OPC contents with compressive strength value of 30.17 N/mm 2 . This agrees with the findings of other researchers [35,10] and [36]. This strength gain can be attributed to the cementitious products formed as a result of hydration of cement and those formed when lime reacts with the pozzolana incorporated [37]…”

Section: Mechanical Propertiessupporting

confidence: 92%

Assessment of Embodied Energy and Carbon IV Oxide Emission of Concrete Containing Corncob Ash

Abubakar¹,

Mohammed²,

Samson³

2021

IJSGE

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The purpose of this study is to assess the Embodied Energy (EE) and Carbon IV Oxide (CO 2 ) emissions saving potentials of Corn Cob Ash (CCA) as partial replacement of Ordinary Portland Cement (OPC) in concrete. Cement manufacture is energy intensive and contributes considerable amount of CO 2 emissions into the atmosphere. Globally, Concrete is the most consumed man-made material and about 95% of CO 2 emissions from a cubic meter of concrete are from cement manufacturing. In this study, the experimental plan was designed to carry out compressive strength, flexural strength, density and water absorption tests on the concrete using 0, 5, 10, 15 and 20% CCA contents to replace OPC. Inventory method of analysis was used to determine the EE and CO 2 emission for all the concrete mixes. The results indicated that the water absorption, density, compressive and flexural strength decreased with increase in CCA content and increased with curing period. The optimum blend was obtained at 10% CCA and 90% OPC contents. The EE and CO 2 emission decreased with increase in CCA contents. At 20% CCA content the EE was 2382 MJ/m 3 which is 12.04% less than that of control samples. Also, 16.37% embodied CO 2 emission saving was obtained for samples containing 20% CCA. The regression equations generated gave standard deviation, S, < 1.0, P-value < 0.05, T-statistics > T24, 0.05 and F-statistics > F1, 23, 0.05. All these indicated that there is good relationship between the predictors and the responses.

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Section: Mechanical Propertiessupporting

confidence: 92%

Assessment of Embodied Energy and Carbon IV Oxide Emission of Concrete Containing Corncob Ash

Abubakar¹,

Mohammed²,

Samson³

2021

IJSGE

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“…According to the report of US, China, Brazil, Argentina, and Ukraine have been the leading maize-producing countries in the world and account for about 75.18% of production. Corncob ashes (CCA) have become one of the potential agricultural waste products of pozzolanic materials to be replaced with cement partially [40][41][42][43][44][45]. e test result of the chemical compositions made with X-ray fluorescence (XRF) and energy dispersive X-ray spectroscopy (EDS) conducted by the researchers is shown in Table 3.…”

Section: Materials Characterizationmentioning

confidence: 99%

“…Based on the various tests conducted by Singh et al [43], the compressive strength of concrete mixtures made with corncob ashes (CCA) pozzolanic cementitious material decreased with increase in temperature beyond the standard room temperature (20 °C). ey demonstrate laboratory tests to compressive strength for concrete at different elevated temperature (150 °C, 300 °C, 450 °C, and 600 °C) with a CCA content of 5%, 10%, 15%, and 20% to replace cement partially at 0.45 water binder ratio.…”

Section: Effects On Hardening Properties Of Concrete and Mortarmentioning

confidence: 99%

Effect of Agricultural Crop Wastes as Partial Replacement of Cement in Concrete Production

Zerihun

Yehualaw

2022

Advances in Civil Engineering

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The main goal of this review paper was to study the physical and chemical properties of agricultural crop wastes and their potentials to partially replace in production of mortar and concrete. Bamboo leaves’ ashes (BLA), banana leaves’ ashes (BNLA), corncob leaves’ ashes (CCA), groundnut ashes (GNA), rice husk ashes (RHA), and sugarcane bagasse ashes (SCBA) were selected to be reviewed. The chemical composition of these agricultural wastes revealed that the they are basically composed of alumino-siliceous materials conforming the requirement of pozzolanic materials. Compared with cement, they have finer particle size and higher surface area. The effect of partial replacement of cement by BLA, BNLA, CCA, GNA, RHA, and SCBA on the properties of fresh concrete (consistency, workability, and setting time), mechanical properties (compressive and tensile strength), microstructure (scanning electron microscopy, derivative thermogravimetry, and X-ray diffraction), and durability (ultrapulse velocity, water absorption, and sulphate attack) of concrete was recapped. The inclusion of BLA, CCA, RHA, and SCBA as partial replacement of cement reduced the workability of concrete due to their finer particle size. The mechanical performance of concrete showed enhancement with partial replacement of cement by BLA, RHA, and SCBA due to the involvement of amorphous silica in secondary reaction to produce densified tetrahedral gel. Consequently, uniform and denser morphology was formed, and durability was enhanced as densification of hydrated gel increased. In general, the review exposed that agricultural crop wastes satisfy pozzolanic material properties and have strong potential to replace cement up to 10% without compromising the performance of concrete.

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“…• CCA blended cement reduced water absorption. Singh et al (2018) To investigate the impacts of high temperatures on CCA as a replacement for cement in concrete…”

Section: Cca As Cementitious Materialsmentioning

confidence: 99%

“…The authors also demonstrated that the addition of sodium sulfate lowered the setting times, induction times, as well as enhanced the hydration and compressive strength. Singh et al (2018) examined the effect of temperature on the pozzolanic performance and mechanical properties of CCA in concrete. They reported that an increase of CCA content in concrete lowered the compressive strength at normal temperatures; a reverse trend was observed at higher temperatures.…”

Section: References Objective Of the Study Parameters/ Reaction Conditions Findings/conclusionmentioning

confidence: 99%

Utilization of Corn Cobs Ash as Cementitious and Binary Cementitious Materials in Concrete and Cement-based Composites: A Review

2021

DRCSF

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This paper reviews the utilization of corn cobs ash (CCA) as pozzolanic, cementitious, and binary cementitious materials in concrete. CCA is the grey-to-brown, inorganic or heterogeneous residual material derived from the high- temperature incineration or combustion of corn cobs (CC). Despite the typical problematic nature of biomass ash, the chemical composition of CCA renders it a potential pozzolanic material. Therefore, numerous studies have critically examined the process technologies and operational conditions for CCA production and its application as a partial replacement for cement in concrete. Other studies have extensively characterized the physicochemical, morphological, microstructure, and thermal properties of CCA through various analytical techniques. Potential pozzolanic materials must meet the condition: SiO2 + Al2O3 + Fe2O3 ≥ 70%, according to ASTM C618, to which CCA complies satisfactorily. Hence, the use of CCA as a replacement for cement has been investigated over the years. Findings indicate that the partial replacement of cement with CCA decreases compressive strength, thermal conductivity, ultrasonic pulse velocity, and density of the hardened concrete at normal temperatures. Nevertheless, the thermal treatment (calcination) of CCA and extended curing enhances compressive strength owing to higher silica content and extended surface area. Besides, the partial replacement of cement with CCA enhances the insulation properties of mortar, which improves thermal comfort, costs and energy savings in buildings. Hence, the partial replacement of cement with CCA provides an environmentally friendly, low cost, and sustainable approach for valorizing CC residues whilst addressing CO2 emissions in construction.

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A Sustainable Environmental Study on Corn Cob Ash Subjected To Elevated Temperature

Cited by 14 publications

References 10 publications

Assessment of Embodied Energy and Carbon IV Oxide Emission of Concrete Containing Corncob Ash

Assessment of Embodied Energy and Carbon IV Oxide Emission of Concrete Containing Corncob Ash

Effect of Agricultural Crop Wastes as Partial Replacement of Cement in Concrete Production

Utilization of Corn Cobs Ash as Cementitious and Binary Cementitious Materials in Concrete and Cement-based Composites: A Review

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