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Use of Recycled Aggregates in Construction

6 Use of Recycled Aggregates in Construction 1 INTRODUCTION 1.1 General There is increasing demand and interest in aggregates from non-traditional sources such as from industrial by-products and recycled construction and demolition (C&D) wastes.

Effect of Recycled Concrete Aggregate Properties on the

Abstract Application of recycled concrete aggregates (RCA) has increased recently as a sustainable alternative in concrete construction. Although application of RCA has substantially grown over the past decades, issues related to its structural performance and long-term behaviour still prevent


ii Abstract As interest in sustainable materials such as recycled aggregate concrete (RAC) rises, effort, it is important to understand the properties of RAC that relates to its use in construction. To respond to this need, various tests were performed to investigate the properties of RAC.


ABSTRACT: The recycled aggregate is obtained from construction waste or waste concrete, which is then made into recycled concrete. In this paper, according to the characteristics of local raw materials, the source and processing technology of recycled aggregates is analyzed,


the recycled aggregate concrete is almost 85% and 80% of natural aggregate concrete. Amn on.et.al (2002), concrete having a 28 -day compressive strength of 28 MPa was crushed at ages 1, 3 and 28 days to serve as a source of aggregate for new concrete,

Mechanical Behavior of Recycled Fine Aggregate Concrete with

This study investigated the mechanical behavior of normal strength (NS) and high strength (HS) concrete containing recycled fine aggregates (RFAs). A high slump mixing design was employed, which may be potentially used as filled structural concrete. The compressive strength, tensile strength, and elastic modulus were measured according to the RFA replacement ratio and curing time. In addition ...

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Recycled Aggregate

Recycled aggregate is produced by crushing concrete, and sometimes asphalt, to reclaim the aggregate. Recycled aggregate can be used for many purposes. The primary market is road base. For information on recycling asphalt pavement into new asphalt pavement. See Asphalt Pavement Recycling.

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Compressive behavior of steel fiber reinforced recycled aggregate

abstract = "For sustainability considerations, the use of recycled aggregate in concrete has attracted many interests in the research community. One of the main concerns for using such concrete in buildings is its spalling in fire. This may be alleviated by adding steel fibers to form steel fiber reinforced recycled aggregate concrete (SFRAC ...


aggregates (sand) which passes through a 4.75 mm standard test sieve. 2.2. Recycled Aggregates Recycled aggregates originate from construction and demolition debris and consist mainly of crushed concrete and crushed asphalt pavement. Reusing and recycling of construction and demolition wastes are among the principle of sustainable

PAPER OPEN ACCESS Non-Destructive Testing of Recycled

Abstract. Currently, recycled aggregate concrete is a widely used building material. Due to negative influences on concrete’s mechanical properties, it is mostly used in low-valued applications. Nevertheless, high quality recycled concrete aggregates derived from a good

Characterisation of recycled aggregates and mortar studies using

Characterisation of recycled aggregates and mortar studies using recycled fine aggregate. Vishal Shrivastava. Indian Institute of Technology Guwahati, Guwahati 781039. Prof. Ravindra Gettu. Indian Institute of Technology Madras, Chennai 600025. Abstract

Aggregate Recycling Plant,Aggregate Crushing Plant

Aggregate Recycling Plant Abstract. Abstract: with the accelerating urbanization process, urban transformation and the rapid development of construction industry, concrete as cement, sand, pebbles and gravel, the biggest consumers of natural resources, global concrete indust…


ABSTRACT An experimental investigation was conducted to study the mechanical as well as micro structural properties of recycled aggregate concrete (RAC) exposed to elevated temperature. Fly ash (as replacement of cement) was added while making concrete. Recycled aggregates are mixed with natural aggregates also to prepare concrete.

Journal of Civil Engineering and Management

AbstractThe use of recycled concrete aggregate (RCA) in concrete as partial and full replacements of natural coarse aggregate is growing interest in the construction industry, as it reduces the demand for virgin aggregate.

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Performance of Recycled Aggregate Concrete

behavior of recycled aggregate in concrete structures. experimenting fresh and hardened concrete, mixtures containing recycled aggregates. The percent of fine recycled aggregate in the all recycled aggregate was about 5.0% so it was excluded from the study. 0 %,30 % and 60 % of coarse recycled aggregate was used in the experimental tests .

Strength and Durability Evaluation of Recycled Aggregate Concrete

14-05-2015 · This paper discusses the suitability of producing concrete with 100 % recycled aggregate to meet durability and strength requirements for different applications. Aggregate strength, gradation, absorption, specific gravity, shape and texture are some of the physical and mechanical characteristics that contribute to the strength and durability of concrete. In general, the quality of recycled …

Destructive Strength Properties of Recycled Coarse Aggregate

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Abstract — Due to a critical shortage of natural aggregate, the availability of demolished concrete for use as recycled coarse aggregate (RCA) is increasing.

Evaluation of Recycled Aggregates Test Section Performance

The need to consider sustainability in design dictates that materials should be recycled and reused whenever possible. The Minnesota Department of Transportation (MnDOT) is quite progressive in allowing the use of recycled aggregates in new construction. While the use of recycled concrete aggregate (RCA) in the base course of

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Effects of Recycled Aggregate on Concrete Mix and Exposure to

25-06-2019 · The unit weight of the concrete ranged from 2365 to 2175 kg/m 3, depending on aggregate content (Figure 6).Increasing the recycled aggregate content reduces the unit weight and density of the concrete, resulting in lighter concrete (Figure 6).The unit weights of the 15%, 20%, and 25% mixes were reduced by 8%, 11%, and 11.5%, respectively, compared to plain concrete.

Production of Recycled Plastic Aggregates and Its Utilization

A novel aggregate (RPA) comprising recycled plastic was developed. The aggregate produced was lightweight, with a density ranging from 510 to 750 k kg / m 3 and absorption of from 2.7 to 9.81%. Other properties were comparable to aggregates of similar densities.

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Design of Road Pavement Using Recycled Aggregate - NASA/ADS

Abstract. The presented article gives special attention to codified clauses of the road construction law, the relevant clauses of the standards and technical regulations to design and control the quality of recycled aggregate constructions.


Recycled aggregates composed of original aggregates and adhered mortar. The physical properties of recycled aggregates depend on both adhered mortar quality and the amount of adhered mortar.

Optimizing mix proportion of recycled aggregate concrete by

Abstract It is necessary to ensure the properties of recycled aggregate concrete (RAC) can meet the requirements of those for the corresponding natural aggregate concrete (NAC), since only in such ...