Sustainable Aggregates: The Potential and Challenge for Natural Resources Conservation

Ismail, Shariman Ismadi; Kwan, Wai Hoe; Ramli, Mahyuddin

doi:10.1016/j.sbspro.2013.07.183

Cited by 63 publications

(26 citation statements)

References 11 publications

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“…The first phase of the study was replacing cement by 5, 10, 15 and 20% RHA (by weight of cement) to assess the effect of RHA on wet and hardened properties of concrete. In the second phase, FVA and CVA were replaced by 10,20,30,40, and 50% FRAP and CRAP (by weights of FVA and CVA) respectively to ascertain the influence of RAP on the properties of concrete. The third phase was to ascertain the collective effects of RHA and RAP on engineering properties of concrete.…”

Section: Design and Mixing Proceduresmentioning

confidence: 99%

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Experimental Investigation on Engineering Properties of Concrete Incorporating Reclaimed Asphalt Pavement and Rice Husk Ash

2018

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Waste generation from agricultural and construction industries is growing at an upsetting rate that causes a heavy burden on landfill facilities. On the other hand, the construction industry is exhausting natural resources thereby posing environmental problems. This study investigates the potential use of agro-industrial waste such as rice husk ash (RHA) and construction waste like reclaimed asphalt pavement (RAP) as promising construction materials. The durability and physical and mechanical properties of concrete were assessed by partially replacing cement and virgin aggregates with RHA and RAP, up to 20% and 50%, respectively. A total of 22 mixes were studied, twelve of which were devoted to studying the collective effects of RHA and RAP on the engineering properties of concrete. Based on experimental results, RHA and RAP decreased slump, compacting factor, density, water absorption and sorptivity. RHA increased compressive and tensile splitting strength, whereas RAP decreased compressive and tensile splitting strength. Comparable strength and favorable sorptivity values were obtained when 15% RHA was combined with up to 20% RAP in the concrete mix. Thus, utilizing RHA and RAP as concrete ingredients can contribute to solid waste management, engineering and economic benefits.

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Section: Design and Mixing Proceduresmentioning

confidence: 99%

“…Concurrently, a substantial quantity of construction and agro-industrial solid wastes disposal is posing a huge threat to the environment [10][11][12]. For example, road maintenance and rehabilitation …”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Engineering Properties of Concrete Incorporating Reclaimed Asphalt Pavement and Rice Husk Ash

2018

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“…The utilization of recycled concrete aggregates (RCAs) in largescale productions of recycled aggregate concrete (RAC) facilitates a sustainable construction by maximizing the use of existing resources and reducing environmental pollution [1,2]. However, the construction industry still doubts the use of RAC in structural constructions.…”

Section: Introductionmentioning

confidence: 99%

Diversified Production of Recycled Aggregate Concrete Mixture with the Addition of Single and Hybrid Fibers

Ismail¹,

Mohammad²,

Ramli³

2018

IJET

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The low strength property of recycled concrete aggregates (RCAs) limits its widespread application in the production of high-strength recycled aggregate concrete (RAC). In this study, RCA properties were improved prior to its incorporation into an RAC mixture through surface treatment. This mixture was subsequently diversified considering the benefits of adding various fiber-reinforced systems to enhance RAC performance. Two types of short discrete synthetic fibers, namely, polyolefin and polypropylene, were added in single and hybrid forms. This study aimed to investigate the effectiveness of the diversified modification of RAC mixture production on the mechanical strength of the resulting RAC. Various properties of the modified RAC were analyzed. Although the modified RAC mixture using treated RCA significantly enhanced the mechanical strength of this RAC, the diversification of the RAC mixture with additional polyolefin and polypropylene fibers, particularly in the hybrid form, further optimized the RAC performance.

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“…Previous studies have highlighted the benefits of large-scale recycling of concrete waste: its great potential benefits in controlling the over-discharge of construction and demolition wastes that otherwise would have been disposed in landfills, decreases the dependence of the construction industry on natural aggregates, thereby preserving natural resources, provides savings from the treatment of waste disposal, and yields alternative sources for urban areas facing shortage of natural aggregates [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Properties of Recycled Aggregate Concrete Reinforced with Polypropylene Fibre

Mohammad¹,

Ismail²,

Alwi³

2016

MATEC Web Conf.

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Abstract. This research work is aimed to investigate how the addition of various proportion of polypropylene fibre affects the mechanical strength and permeability characteristics of recycled aggregate concrete (RAC) which has been produced with treated coarse recycled concrete aggregate (RCA). Further research on RAC properties and their applications is of great importance as the scarcity of virgin aggregate sources in close proximity to major urban centers is becoming a worldwide problem. In this study, the hardened RAC properties at the curing age of 7 and 28 days such as compressive strength, flexural strength, ultrasonic pulse velocity (UPV), water absorption and total porosity were evaluated and compare with control specimens. Experimental result indicates that although the inclusion of the treated coarse RCA can enhance the mechanical strength and permeability properties of RAC, Further modification by addition of polypropylene fibre can optimize the results.

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Sustainable Aggregates: The Potential and Challenge for Natural Resources Conservation

Cited by 63 publications

References 11 publications

Experimental Investigation on Engineering Properties of Concrete Incorporating Reclaimed Asphalt Pavement and Rice Husk Ash

Experimental Investigation on Engineering Properties of Concrete Incorporating Reclaimed Asphalt Pavement and Rice Husk Ash

Diversified Production of Recycled Aggregate Concrete Mixture with the Addition of Single and Hybrid Fibers

Properties of Recycled Aggregate Concrete Reinforced with Polypropylene Fibre

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