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

He, Junliang; Kawasaki, Satoru; Achal, Varenyam

doi:10.3390/su12176971

Cited by 92 publications

(42 citation statements)

References 88 publications

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“…Most artificial aggregates produced from waste or by-products, [42,[197][198][199] and their unique properties, such as porosity and absorption capacity, have the added benefits of supplying water internally for self-curing concrete [48,84,163]. In addition, using large quantities of industrial and agricultural waste can help to reduce suspension in natural aggregates [200,201]. Moreover, it is seen as an effective process to convert waste or by-products into valuable building materials.…”

Section: Environmental Benefits Of Self-curing Concrete or Mortarmentioning

confidence: 99%

A Review on the Use of Self-Curing Agents and Its Mechanism in High-Performance Cementitious Materials

et al. 2022

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Self-cured concrete is a type of cement-based material that has the unique ability to mitigate the loss rate of water and increase the capacity of concrete to retain water compared to conventional concrete. The technique allows a water-filled internal curing agent to be added to the concrete mixture and then slowly releases water during the hydration process. Many researchers have studied the composition of self-curing concrete using different materials such as artificial lightweight aggregate (LWA), porous superfine powders, superabsorbent polymers (SAP), polyethylene glycol (PEG), natural fibers, and artificial normal-weight aggregate (ANWA) as curing agents. Likewise, physical, mechanical, and microstructure properties, including the mechanisms of curing agents toward self-curing cement-based, were discussed. It was suggested that adopting self-curing agents in concrete has a beneficial effect on hydration, improving the mechanical properties, durability, cracking susceptibility behavior, and mitigating autogenous and drying shrinkage. The interfacial transition zone (ITZ) between the curing agent and the cement paste matrix also improved, and the permeability is reduced.

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Section: Environmental Benefits Of Self-curing Concrete or Mortarmentioning

confidence: 99%

A Review on the Use of Self-Curing Agents and Its Mechanism in High-Performance Cementitious Materials

et al. 2022

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“…One solution to reduce the amount of waste is to increase the number of natural materials in the construction industry that are biodegradable and do not leave waste behind or can be recycled after their end of life [ 13 , 14 ]. The use of natural-based materials and agricultural waste in construction material applications as alternative materials [ 15 , 16 ] or the development and use of natural-based thermal insulation materials, especially from renewable or by-product sources [ 17 , 18 ], are reasonable solutions to reduce our environmental footprint.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer in Straw-Based Thermal Insulating Materials

2021

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An analytic-empirical model was developed to describe the heat transfer process in raw straw bulks based on laboratory experiments for calculating the thermal performance of straw-based walls and thermal insulations. During the tests, two different types of straw were investigated. The first was barley, which we used to compose our model and identify the influencing model parameters, and the second was wheat straw, which was used only for validation. Both straws were tested in their raw, natural bulks without any modification except drying. We tested the thermal conductivity of the materials in a bulk density range between 80 and 180 kg/m3 as well as the stem density, material density, cellulose content, and porosity. The proposed model considers the raw straw stems as natural composites that contain different solids and gas phases that are connected in parallel to each other. We identified and separated the following thermal conductivity factors: solid conduction, gas conduction in stem bulks with conduction factors for pore gas, void gas, and gaps among stems, as well as radiation. These factors are affected by the type of straw and their bulk density. Therefore, we introduced empirical flatness and reverse flatness factors to our model, describing the relationship between heat conduction in stems and voids to bulk density using the geometric parameters of undisturbed and compressed stems. After the validation, our model achieved good agreement with the measured thermal conductivities. As an additional outcome of our research, the optimal bulk densities of two different straw types were found to be similar at 120 kg/m3.

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“…The reduction of CO 2 emissions from cement production can be achieved using agricultural waste that can be utilized as a substitution for cement in cement-based material (He et al 2020).…”

Section: Properties Of Concrete With Tea Wastementioning

confidence: 99%

Improvement of eco-efficient self-compacting concrete manufacture by recycling high quantity of waste materials

Hilal

Hadzima-Nyarko

2021

Environ Sci Pollut Res

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Recycling plastic waste to obtain new materials such as concrete or mortar seems to be one of the best solutions for disposing of plastic waste. Second, in the construction industry, due to the increasing costs of land lls and the lack of a natural large aggregate, the increased interest in crushed ceramics is signi cant. The third type of waste that is dealt with in this article is tea ash because tea is the second most consumed beverage in the world and large amounts of waste are generated. This article attempts to develop the appropriate characteristics of self-compacting concrete by adding the following waste materials: plastic waste, tea waste and collapsed ceramics. In this paper, Fresh and hardened properties of self-compacting concrete with waste materials were investigated. The diameter and time of sediment ow, segregation, L-box ratio, and density of freshly compacted concrete mixtures were measured. Moreover, both 7, 14, and 28-day bending strength and 7 and 28-day bending strength of hardened selfcompacting concrete samples were measured. The results proved the possibility of using plastic waste, tea waste and collapsed ceramics in self-compacted concrete, because they do not signi cantly reduce the hardened and fresh properties of self-compacted concrete.

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

Cited by 92 publications

References 88 publications

A Review on the Use of Self-Curing Agents and Its Mechanism in High-Performance Cementitious Materials

A Review on the Use of Self-Curing Agents and Its Mechanism in High-Performance Cementitious Materials

Heat Transfer in Straw-Based Thermal Insulating Materials

Improvement of eco-efficient self-compacting concrete manufacture by recycling high quantity of waste materials

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