Supplemental use of rice husk ash (RHA) as a cementitious material in concrete industry

Ahsan, Mohammad Badrul; Hossain, Zahid

doi:10.1016/j.conbuildmat.2018.05.101

Cited by 105 publications

(31 citation statements)

References 13 publications

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“…The susceptibility of concrete to the penetration of water depends on capillary suction, which affects the performance of structures. The partial replacement of cement with various percentages and types of agro-waste ash has shown their effectiveness in reducing water absorption of concrete [86]. Off-white rice husk ash (OWRHA), with 15% replacement by weight, showed a reduction in the coefficient of water absorption for the OWRHA blended concrete compared with the 0% benchmark concrete [52].…”

Section: Water Absorptionmentioning

confidence: 99%

The Utilization of Agricultural Waste as Agro-Cement in Concrete: A Review

Kawasaki

Achal

2020

Sustainability

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Concrete, as the world’s most implemented construction material, is increasingly being used because of the rapid development of industrialization and urbanization. Limited resources and progressive depravation of the environment are forcing scientific efforts to seek alternative and effective materials from large amounts of natural resources as additives in the partial replacement of cement. Cement is a main constituent of concrete. To solve and minimize environmental issues, research works attempting to employ the wide availability of agricultural wastes, such as sugar cane bagasse, rice husk, sugar cane straw, and palm oil fuel, among others, into cement, and to finally bring sustainable and environmentally friendly properties to concrete are being examined. Agro-waste materials are crushed into fine and coarse aggregates or are burnt into ash, and are then mixed with cement, which is known as agro-cement. The replacement of aggregates, either partially or fully, is also deemed as a sustainable material in construction. This paper mainly reviews the current research on agro-cement that has been researched and applied for the enhancement of the strength and durability of concrete. It further summarizes the relevant knowledge and techniques, while providing optimal parameters for applying agricultural wastes in concrete.

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Section: Water Absorptionmentioning

confidence: 99%

The Utilization of Agricultural Waste as Agro-Cement in Concrete: A Review

Kawasaki

Achal

2020

Sustainability

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“…Compressive strength of concrete is one of the vital benefits of RHA. Researchers have found great merits of substituting cement for RHA at lower percentages [12,16,42,45,47,57,64,65,68,70]. Table 4 represents the overall trend of the effects of RHA in concrete according to the reviewed researches.…”

Section: Rice Husk Ash (Rha)mentioning

confidence: 99%

Green Concrete: By-Products Utilization and Advanced Approaches

et al. 2019

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The popularity of concrete has been accompanied with dreadful consumptions that have led to huge carbon footprint in our environment. The exhaustion of natural resources is not yet the problem, but also the energy that is needed for the fabrication of the natural materials, in which this process releases significant amount of carbon dioxide (CO2) emissions into the air. Ordinary Portland Cement (OPC) and natural aggregates, which are the key constituents of concrete, are suggested to be recycled or substituted in order to address the sustainability concern. Here, by-products have been targeted to reduce the carbon footprint, including, but not limited to, fly ash, rice husk ash, silica fume, recycled coarse aggregates, ground granular blast-furnace slag, waste glass, and plastic. Moreover, advanced approaches with an emphasis on sustainability are highlighted, which include the enhancement of the hydration process in cement (calcium-silicate hydrate) and the development of new materials that can be used in concrete (e.g. carbon nanotube). This review paper provides a comprehensive discussion upon the utilization of the reviewed materials, as well as the challenges and the knowledge gaps in producing green and sustainable concrete.

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“…The fabrication process implies in significant variations in the physical/morphological and chemical properties of the RHA grains; moreover, directly affecting the properties of cementitious materials made with RHA [13]- [17]. The controlled burning process of the RHA controls, besides the crystallinity of the RHA particles, the carbon content attached in the grains [18]- [20]. Moreover, depending of the amount of carbon on composition of RHA, some particle is able to present some hydrophilic behaviour leading to lack of available water for cement hydration reaction increasing rheological properties of the concrete [18]- [21].…”

Section: Introductionmentioning

confidence: 99%

Rice husk ash as supplementary cementing material to inhibit the alkali-silica reaction in mortars

Langaro

Santos

Medeiros

et al. 2021

Rev. IBRACON Estrut. Mater.

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Alkali-silica reaction (ASR) is one of the most harmful distress mechanisms that affects the durability of concrete worldwide. Yet, it has been found that ASR-induced expansion and distress may be prevented by the appropriate use of supplementary cementing materials (SCMs). Recent studies suggest that rice husk ash (RHA), a by-product of the rice production, may present promising performances as a pozzolanic material and to enhance the durability of blended mixtures. There are many controversial studies regarding the use of RHA and how its properties directly affect the performance and durability of concretes and mortars. The present study aims to evaluate the influence of the RHA on ASR through the accelerated mortar bar test (AMBT), X-Rays Diffraction (XRD), Thermogravimetric Analysis (TG), Mercury Intrusion Porosimetry (MIP) and Scanning Electron Microscopy (SEM). To validate the obtained data, the results were compared with mortars made of a well-known SCM (silica fume) which has distinguished behaviour against ASR. The results indicate that, besides the silica fume mortars have showed better results, the use of RHA suggests promising results to mitigate the ASR, yet, further analysis on concrete prims test should be carried out to fully validate the use of RHA to enhance the durability of the concrete. The RHA finesses and its particle size were the most important properties in the SCM performance.

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Supplemental use of rice husk ash (RHA) as a cementitious material in concrete industry

Cited by 105 publications

References 13 publications

The Utilization of Agricultural Waste as Agro-Cement in Concrete: A Review

The Utilization of Agricultural Waste as Agro-Cement in Concrete: A Review

Green Concrete: By-Products Utilization and Advanced Approaches

Rice husk ash as supplementary cementing material to inhibit the alkali-silica reaction in mortars

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