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Recycled Plain Cement Concrete

This document discusses the increasing demand for construction aggregates and waste production due to growing infrastructure needs. Historically, construction waste was disposed of in landfills, with concrete debris and asphalt making up a large portion. However, rising landfill costs, regulations, and limited land have led the aggregate industry and governments to promote recycling construction waste as an alternative aggregate. Specifically, recycled concrete consists of well-graded aggregates bonded by hardened cement paste, manufactured from demolishing concrete structures like roads, buildings and bridges. It is composed of cement, water and natural or manufactured sand and gravel aggregates.

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Sakshi Gupta
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26 views1 page

Recycled Plain Cement Concrete

This document discusses the increasing demand for construction aggregates and waste production due to growing infrastructure needs. Historically, construction waste was disposed of in landfills, with concrete debris and asphalt making up a large portion. However, rising landfill costs, regulations, and limited land have led the aggregate industry and governments to promote recycling construction waste as an alternative aggregate. Specifically, recycled concrete consists of well-graded aggregates bonded by hardened cement paste, manufactured from demolishing concrete structures like roads, buildings and bridges. It is composed of cement, water and natural or manufactured sand and gravel aggregates.

Uploaded by

Sakshi Gupta
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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1.

INTRODUCTION
The construction of infrastructures related to bridges, highways, water systems, and
buildings has been increasing from the beginning of the past century, especially in areas
where population density is high. Infrastructures need to be repaired with the pass of the
time. In some cases, constructions need to be replaced, because their service life is
reached or their original design no longer satisfy the new requirements (population,
traffic, or weather). These facts have generated two important issues: first, a growing
demand for construction aggregates, and second an increasing production of construction
material waste.
Historically, the most common method of managing this material has been through
disposal in landfills. It is estimated that 50 percent of concrete debris and 20 percent of
all asphalt pavements end up in landfills. As cost, environmental regulations, and land
policies of landfill arise, the concern to seek alternative uses of the waste material also
increases. This situation has led the aggregate industry to begin reclaiming construction
waste as an alternative aggregate especially for pavement uses. Additionally, government
entities have started promoting this recycling process as an option to natural aggregate,
helping extend the life of natural resources, reducing the environmental disturbance
around construction. site, and reducing the volume of waste to landfill areas.
Recycled plain Cement Concrete.
Recycled plain cement concrete consists of high-quality, wellgraded aggregates bonded
by a hardened cementitiuos paste. This material is manufactured from demolition of Plain
cement concrete construction such as roads and runways, and structures such as building
and bridges. Plain cement concrete is a widely used construction material. It is defined as
a mixture of water, Plain cement and aggregates. The paste (water and cement) represents
25% to 40% of the total volume of the concrete, and it functions as the adhesive and bind
the aggregate together to form the concrete. The aggregates consist of natural or
manufactured sand, gravel or crushed stone and make up the other 60% to 75% of the
total volume of concrete.

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