Production of high strength concrete incorporating an agricultural waste - rice husk ash

Mahmud, Hilmi Bin; Hamid, Norjidah Anjang Abdul; Chin, Koay Yew

doi:10.1109/icbee.2010.5649093

Cited by 22 publications

(12 citation statements)

References 2 publications

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“…As mentioned earlier, in what most researchers used, the average particle sizes of ashes were less than that of cement. In this study, the average particles of ashes used were coarser than those of previous studies, 3 lm [9] and 12 lm [11,13]. The average particle sizes of unground BRHA and RHA were about 165 and 85 lm, respectively.…”

Section: Introductioncontrasting

confidence: 50%

“…In this study, black rice husk and grey RHA were ground using the LA abrasion machine. The average particle sizes of BHRA and RHA used were coarser than those previously reported [9,11,13]. Fresh, mechanical and durability properties of concrete containing 20% unground and ground RHAs were investigated and compared to the properties of control concrete.…”

Section: Discussionmentioning

confidence: 88%

“…Chopra et al [12] also mentioned that the inclusion of RHA up to 20% as partial replacement to cement in self-compacted concrete improved the strength and durability properties. Mahmud [13] explained that BRHA with particle size of 12 lm could be used to produce HSC of grade 80, especially at 5% replacement.…”

Section: Introductionmentioning

confidence: 99%

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Effect of utilizing unground and ground normal and black rice husk ash on the mechanical and durability properties of high-strength concrete

2018

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The aim of the present study is to investigate the effects of utilizing different processings of normal rice husk ash (RHA) and black rice husk ash (BRHA) on the mechanical and durability properties of highstrength concrete (HSC). Mechanical and durability properties of HSC were evaluated on concrete mixes containing unground BRHA and RHA and ground BRHA and RHA, their average particles sizes being 165, 85, 67 and 24 lm, respectively. The replacement of ordinary Portland cement with the ashes was adopted at 20%. The results showed that incorporating any form of RHA and BRHA in HSC reduced the slump value. The surface areas of RHA and BRHA, not their carbon content, determined the dosage of superplasticizer needed to achieve a targeted slump value. Concrete with unground and ground RHA incorporated exhibited 30% higher compressive strength while unground BRHA produced 30% lower compressive strength than that of the control concrete. Incorporating unground and ground RHA showed a synergy between filler and pozzolanic effect and had insignificant difference in mechanical and durability properties of the concretes. Meanwhile, incorporating ground BRHA showed a dominant filler effect in the concrete. Overall, the improvement of splitting tensile strength and modulus of elasticity of both RHA and GBRHA concrete showed a similar trend to that of the compressive strength of RHA concrete. The durability of concretes with unground and ground RHA and ground BRHA incorporated showed better performance than that of the control concrete. The material with 20% ground BRHA as partial cement replacement in HSC of Grade 50 could be used without any reduction in the mechanical and durability properties. Use of unground BRHA is not recommended because it did not improve these properties.

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Section: Introductioncontrasting

confidence: 50%

Section: Discussionmentioning

confidence: 88%

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Effect of utilizing unground and ground normal and black rice husk ash on the mechanical and durability properties of high-strength concrete

2018

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“…RHA and FA are highly pozzolanic in nature, and they could be utilized as Portland cement replacements. Due to their high silica content and low cost, these materials have a high potential in the production of secondary cementing material [21]. The annual production of rice husk is about 120 million tons [22].…”

Section: Introductionmentioning

confidence: 99%

Rice Husk Ash and Fly Ash Effects on the Mechanical Properties of Concrete

Bheel¹,

Jokhio²,

Abbasi³

et al. 2020

Eng. Technol. Appl. Sci. Res.

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Cement production involves high amounts of energy consumption and carbon dioxide emissions. Pakistan is facing a serious energy crisis and cement’s cost is increasing. In addition, landfilling of potential concrete components can lead to environmental degradation. The use of waste as cement replacement not only reduces cement production cost by reducing energy consumption, but it is also environmentally friendly. The purpose of this study is to analyze the characteristics of concrete by partially replacing cement with Rice Husk Ash (RHA) and Fly Ash (FA). This study is mainly focused on the performance of concrete conducting a slump test, and investigating indirect tensile and compressive strength. Cement was replaced with RHA and FA by 5% (2.5% RHA + 2.5% FA), 10% (5% RHA + 5% FA), 15% (7.5% RHA + 7.5% FA) and 20% (10% RHA+10% FA) by weight. Ninety concrete samples were cast with mix proportions of 1:2:4 and 0.55 water/cement ratio. Cube and cylindrical samples were used for measuring compressive and split tensile strength respectively, after 7 and 28 days. The results showed that after 28 days, the 5% RHA+5% FA sample’s compressive strength was enhanced by 16.14% and its indirect tensile strength was improved by 15.20% compared to the conventional sample. Moreover, the sample’s slump value dropped as the content of RHA and FA increased.

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“…One of these agro wastes is rice husk. Rice husk annual produced quantity is about 120 million tonnes per year in the paddy field [17][18][19]. The husk manufactured from rice processing is either burnt or dumped.…”

Section: Introductionmentioning

confidence: 99%

Use of Rice Husk Ash as Cementitious Material in Concrete

Bheel

Abro

Shar

et al. 2019

Eng. Technol. Appl. Sci. Res.

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In this research, rice husk ash (RHA) was used as a partial substitute for cement in concrete to reduce its cost, and alternative processing methods using agricultural/industrial waste were found. The main objective of this study was to determine the fresh (flowability) and hardened (splitting tensile strength and compressive strength) concrete properties using RHA at 0%, 5%, 10%, 15% and 20% by weight. A total of 90 concrete samples (45 cubes and 45 cylinders) were prepared and cured on 7, 14, and 28 days to the design of target strength 28N/mm2, and ultimately, these concrete specimens were tested on UTM. Three concrete specimens were cast for each proportion and ultimately the average of the three concrete samples was taken as the final result. The flowability of fresh concrete decreases with increasing content of RHA in concrete. The results showed that the compressive and tensile strength of the concrete specimens increased by 11.8% and 7.31%, respectively by using 10% RHA at 28 days curing.

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Production of high strength concrete incorporating an agricultural waste - rice husk ash

Cited by 22 publications

References 2 publications

Effect of utilizing unground and ground normal and black rice husk ash on the mechanical and durability properties of high-strength concrete

Effect of utilizing unground and ground normal and black rice husk ash on the mechanical and durability properties of high-strength concrete

Rice Husk Ash and Fly Ash Effects on the Mechanical Properties of Concrete

Use of Rice Husk Ash as Cementitious Material in Concrete

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