Suitability Investigation of Recycled Concrete Aggregates for Concrete Production : An Experimental Case Study

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Suitability Investigation of Recycled Concrete Aggregates for Concrete Production : An Experimental Case Study. / Taffese, Woubishet Zewdu.

In: Advances in Civil Engineering, Vol. 2018, 8368351, 2018.

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@article{b35a3a6c0ce64c1b8da47dd22b053424,
title = "Suitability Investigation of Recycled Concrete Aggregates for Concrete Production : An Experimental Case Study",
abstract = "In developing countries, construction and demolition waste (CDW) is disposed to landfill, causing social, environmental, and economic crises. In these nations, CDW exponentially increase due to their rapid economic growth, industrialization, and urbanization. This paper aims to examine the possibility of recycling concrete waste for production of new concrete in Ethiopia. Physical and mechanical characteristics of recycled concrete aggregate (RCA) acquired from concrete waste are thoroughly examined. Though the RCA exhibited relatively lesser performance compared with the natural coarse aggregate (NCA), it reveals the same properties as of normal-weight aggregates in several instances. The performance of concrete specimens which employ RCA up to 20{\%} is evaluated from workability, strength, and permeability aspects. The utilization of RCA slightly affects the workability and the water permeability properties of the concretes. Replacement of 10{\%} of the NCA by the RCA enhances the compressive strength of the hardened concrete by 8{\%}. The difference between the splitting tensile strength of the concretes which employ RCA and conventional aggregates is trivial. Generally, this work demonstrates the practicability of concrete waste recycling to produce new concrete or construction materials in Ethiopian context.",
keywords = "SELF-COMPACTING CONCRETE, STRUCTURAL CONCRETE, DEMOLITION WASTES, FLY-ASH, CONSTRUCTION, DURABILITY, PERFORMANCE, BLOCKS, FIBER",
author = "Taffese, {Woubishet Zewdu}",
year = "2018",
doi = "10.1155/2018/8368351",
language = "English",
volume = "2018",
journal = "Advances in Civil Engineering",
issn = "1687-8086",

}

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TY - JOUR

T1 - Suitability Investigation of Recycled Concrete Aggregates for Concrete Production : An Experimental Case Study

AU - Taffese, Woubishet Zewdu

PY - 2018

Y1 - 2018

N2 - In developing countries, construction and demolition waste (CDW) is disposed to landfill, causing social, environmental, and economic crises. In these nations, CDW exponentially increase due to their rapid economic growth, industrialization, and urbanization. This paper aims to examine the possibility of recycling concrete waste for production of new concrete in Ethiopia. Physical and mechanical characteristics of recycled concrete aggregate (RCA) acquired from concrete waste are thoroughly examined. Though the RCA exhibited relatively lesser performance compared with the natural coarse aggregate (NCA), it reveals the same properties as of normal-weight aggregates in several instances. The performance of concrete specimens which employ RCA up to 20% is evaluated from workability, strength, and permeability aspects. The utilization of RCA slightly affects the workability and the water permeability properties of the concretes. Replacement of 10% of the NCA by the RCA enhances the compressive strength of the hardened concrete by 8%. The difference between the splitting tensile strength of the concretes which employ RCA and conventional aggregates is trivial. Generally, this work demonstrates the practicability of concrete waste recycling to produce new concrete or construction materials in Ethiopian context.

AB - In developing countries, construction and demolition waste (CDW) is disposed to landfill, causing social, environmental, and economic crises. In these nations, CDW exponentially increase due to their rapid economic growth, industrialization, and urbanization. This paper aims to examine the possibility of recycling concrete waste for production of new concrete in Ethiopia. Physical and mechanical characteristics of recycled concrete aggregate (RCA) acquired from concrete waste are thoroughly examined. Though the RCA exhibited relatively lesser performance compared with the natural coarse aggregate (NCA), it reveals the same properties as of normal-weight aggregates in several instances. The performance of concrete specimens which employ RCA up to 20% is evaluated from workability, strength, and permeability aspects. The utilization of RCA slightly affects the workability and the water permeability properties of the concretes. Replacement of 10% of the NCA by the RCA enhances the compressive strength of the hardened concrete by 8%. The difference between the splitting tensile strength of the concretes which employ RCA and conventional aggregates is trivial. Generally, this work demonstrates the practicability of concrete waste recycling to produce new concrete or construction materials in Ethiopian context.

KW - SELF-COMPACTING CONCRETE

KW - STRUCTURAL CONCRETE

KW - DEMOLITION WASTES

KW - FLY-ASH

KW - CONSTRUCTION

KW - DURABILITY

KW - PERFORMANCE

KW - BLOCKS

KW - FIBER

U2 - 10.1155/2018/8368351

DO - 10.1155/2018/8368351

M3 - Article

VL - 2018

JO - Advances in Civil Engineering

JF - Advances in Civil Engineering

SN - 1687-8086

M1 - 8368351

ER -

ID: 29082903