Incorporation of Wheat Straw Ash as Partial Sand Replacement for Production of Eco-Friendly Concrete

Memon, Shazim Ali; Javed, Usman; Haris, Muhammad; Khushnood, Rao Arsalan; Kim, Jong

doi:10.3390/ma14082078

Cited by 13 publications

(7 citation statements)

References 64 publications

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“…It can be observed that the compressive strength was higher for lower w/c ratios (w/c = 0.4). This trend suggests that the density is directly proportional for conventional concretes, and similar conclusions can be found for other organic materials used as replacements for fine aggregates [55]. However, this relationship did not hold for concretes with higher percentages of hazelnut shell, which is lighter and more porous than regular aggregates.…”

Section: Influence On Compressive Strengthsupporting

confidence: 61%

Influence on Physical and Mechanical Properties of Concrete Using Crushed Hazelnut Shell

Gálvez Cartagena,

Muñoz Araya,

Yanez

et al. 2023

Applied Sciences

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Concrete production requires a significant amount of natural resources, with aggregates comprising between 55% and 80% of the total volume. However, the over-exploitation of natural aggregates has led to the exploration of alternative materials for use in concrete production. In this study, crushed hazelnut shells were investigated as a partial replacement for fine aggregate, addressing the problem of natural resource depletion and offering a second use for this important agricultural waste product available in Chile. Hazelnut shells were incorporated in percentages of 2.5%, 5%, and 10% by weight of sand for water/cement ratios of 0.4 and 0.5. The compressive strength at 7 and 28 days and bending strength at 28 days were determined, alongside physical properties such as the workability, temperature, air content, fresh density, and hardened density of the concrete. Our findings showed that replacing 2.5% of the fine aggregate with hazelnut shells led to a higher compressive strength at 28 days, exceeding the strength of the standard specimens by 9.5%, whereas replacing 5% of the fine aggregate led to the highest bending strength, exceeding the strength of the standard specimens by 3.5%. Moreover, the 0.4 w/c ratio consistently led to better results for both compressive and bending strength, with fewer and lower reductions in mechanical strength compared to the standard mixture. Our results suggest that concrete mixes with hazelnut shells as a replacement for fine aggregate at a percentage of up to 2.5% can be used in construction systems with a compression strength lower than 17 MPa, and mixtures with up to 10% hazelnut shell replacement can be used in structures with tensile bending stress requirements lower than 6 MPa. Overall, the use of hazelnut shells as a partial replacement for fine aggregate in concrete production presents an environmentally friendly and cost-effective solution for the construction industry.

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Section: Influence On Compressive Strengthsupporting

confidence: 61%

Influence on Physical and Mechanical Properties of Concrete Using Crushed Hazelnut Shell

Gálvez Cartagena,

Muñoz Araya,

Yanez

et al. 2023

Applied Sciences

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“…The utilization of biomass aggregate for concrete preparation can effectively improve the energy consumption of buildings. Some researchers have found [6][7][8][9][10][11][12][13] that when concrete is prepared using biomass aggregates such as pine needles, canola straw, coconut husk, corn cob, and corn stover, density and thermal conductivity decrease with the increase of biomass aggregates. In addition, some of the durability properties and plasticity were improved.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties, thermal properties and durability of lightweight thermal insulation recycled concrete

Xu,

Pan,

et al. 2024

Preprint

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To improve forestry solid waste reuse, reduce building energy consumption, and increase building capacity, preparing lightweight concrete with new materials has gained recent attention. This paper used waste wood and expanded perlite (EP) to design lightweight thermal insulation recycled concrete (LTIRC) with different volume admixtures. Compared to mineral aggregate, wood aggregate (WA) and EP show large differences in water absorption, particle morphology, density, and crushing index. Therefore, this paper comprehensively evaluated the dry density, mechanical properties, thermal properties, chloride ion permeability, and frost resistance of LTIRC. The results showed WA and EP introduction effectively reduced concrete bulk weight and met the dry density standard for lightweight concrete. Regarding thermal insulation performance, both WA and EP are characterized by porous, low–density, and low thermal conductivity. Consequently, LTIRC thermal conductivity was reduced by up to 76.5% versus conventional concrete, effectively increasing resistance to heat flow through concrete and providing potential for building energy savings. Additionally, WA and EP addition caused LTIRC to experience mechanical and durability property deterioration. However, some LTIRCs achieved over 80% of the strength of natural aggregate concrete. Moreover, WA addition inhibited internal crack generation in LTIRC and slowed concrete damage from increased WA and EP dosage. The maximum mass loss of LTIPC was 2.72% after 100 freeze–thaw cycles. LTIPC precast panels are suitable for preparing low–carbon insulated building wall panels.

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“…The concrete industry puts a strain on some finite natural resources, such as sand [4] and water [5]. By substituting sand with organic waste materials, various active and passive advantages can be achieved, such as the mitigation of environmental challenges related to sand consumption, the reduction of costs and environmental issues linked to the amount of organic waste disposal and management, and the possibility to store carbon in concrete through organic waste.…”

Section: Introductionmentioning

confidence: 99%

“…The results showed that the compressive strength decreases with increasing the share of corncob ash in the mix. Replacing 10% of aggregates with wheat straw ash has been found to increase the compressive strength of concrete [4]. The use of rice husk ash has been previously investigated as a partial cement substitute in concrete [15].…”

Section: Introductionmentioning

confidence: 99%

Concrete with Organic Waste Materials as Aggregate Replacement

Bertoldo,

Qureshi,

Simpkins

et al. 2023

Applied Sciences

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The disposal of high volumes of organic waste is a global issue. Using organic waste instead of sand as an aggregate material for concrete could reduce the strain on waste treatment processes and on the extraction of finite resources. At the same time, it could be a climate change mitigation strategy, by storing the biogenic carbon contained in the organic waste. This project investigated the viability of replacing 10% of fine aggregate in concrete with various organic waste materials, namely rice husk ash, wood ash, corncob granules, and wheat straw. The fresh concrete’s properties were studied using the slump test, and the hardened concrete’s mechanical properties were measured using the compressive strength and flexural strength tests. In this study, 14 days of curing were considered for the mechanical tests, although the 28-day mechanical strength is more generally accepted. The mechanical performances along with a life cycle assessment (LCA) comparison between the concrete with organic waste and traditional concrete were conducted. The results suggested that rice husk ash and wood ash are the most-suitable organic waste products for use as aggregate replacers considering the mechanical properties. The concrete samples incorporating wheat straw and corncob granules exhibited relatively low strength; unless advanced treatment methods are applied to enhance the concrete’s performance, the utilization of these organic wastes in concrete may be limited. The environmental impact assessment of traditional concrete shows that the main contributor to almost every impact category is the production of Portland cement. Sand production contributes only marginally to the overall impact of the concrete. In terms of life-cycle greenhouse gas (GHG) emissions, traditional concrete exhibits the lowest GWP impact per cubic meter when mechanical properties are included in the functional unit used for the comparison. Nevertheless, concrete samples with wood ash and rice husk ash partially offset their lower compressive strength with higher carbon sequestration, showing a similar GWP impact to traditional concrete. This makes them promising alternatives, especially for cases where limited compressive strengths are needed. Further investigations to improve their mechanical properties and optimize their performance are warranted.

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Incorporation of Wheat Straw Ash as Partial Sand Replacement for Production of Eco-Friendly Concrete

Cited by 13 publications

References 64 publications

Influence on Physical and Mechanical Properties of Concrete Using Crushed Hazelnut Shell

Influence on Physical and Mechanical Properties of Concrete Using Crushed Hazelnut Shell

Mechanical properties, thermal properties and durability of lightweight thermal insulation recycled concrete

Concrete with Organic Waste Materials as Aggregate Replacement

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