Assessment Of Recycled Aggregate Concrete

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Compressive strength assessment of recycled aggregate ...

PDF | The main objective of this study was to estimate the compressive strength of recycled aggregate concrete (RAC) by means of Schmidt rebound hammer and core testing. The use of recycled ...

Recycled concrete as an aggregate for concrete—a review ...

Abstract. The present state of knowledge on the use of recycled concrete as an aggregate in new concrete is reviewed and suggestions made as to what further work is necessary before a proper assessment of the material can be made.

Comparative assessment of embodied energy of recycled ...

Comparative assessment of embodied energy of recycled aggregate concrete Article in Journal of Cleaner Production 152 · March 2017 with 344 Reads How we measure 'reads'

Assessment of reliability-based FRP reinforcement ratio ...

The present study assessed the reliability-based reinforcement ratio of FRP reinforced concrete structure applying recycled coarse aggregate (RCA) concrete. The statistical characteristics of FRP bars and RCA concrete were investigated from the previous literatures and the mean value and standard deviation were employed for the reliability ...

ASSESSMENT OF RECYCLED AGGREGATE CONCRETE | Ahmad …

The application of recycled aggregate to use in construction activities have been practice by developed European countries and also of some Asian countries. This paper reports the results of an experimental study on the mechanical properties of recycled aggregate concrete (RAC) as compared to natural aggregate concrete (NAC).

Use of Recycled Aggregate Concrete

ABSTRACT: Use of recycled aggregate in concrete can be useful for environmental protection. Recycled aggregates are the materials for the future. The application of recycled aggregate has been started in a large number of construction projects of many European, American, Russian and Asian countries. Many countries are

Compressive strength assessment of recycled aggregate ...

The main objective of this study was to estimate the compressive strength of recycled aggregate concrete (RAC) by means of Schmidt rebound hammer and core testing. The use of recycled aggregate in concrete has been shown to lead to a decrease in the construction cost and it can reduce the burden on the environment by saving natural aggregates.

Strength Assessment of Recycled Aggregate Concrete by ...

concrete debris as recycled concrete aggregate conserves natural aggregates, reduces the impact on landfills, decreases energy consumption and can provide cost savings. The use of recycled aggregates in concrete results in significant economical and environmental benefits.Using the UPV, it

Life Cycle Assessment of Natural and Recycled Concrete ...

The environmental impacts of natural aggregates (NA) and recycled concrete aggregates (RCA) production for use in road pavements have been evaluated in this study through an attributional life cycle assessment (LCA) from cradle to gate.

Durability Assessment of Recycled Concrete Aggregates for ...

The primary goal of this research project was to investigate the long-term durability of concrete incorporating recycled concrete aggregate (RCA) through accelerated laboratory testing. Overall it was found that modifications to standard aggregate testing and characterization standards were necessary for testing RCA. This included

A closed-loop life cycle assessment of recycled aggregate ...

This paper studies the potential environmental impact of recycled coarse aggregate (RCA) for concrete production in China. According to the cradle-to-cradle theory, a closed-loop life cycle assessment (LCA) on recycled aggregate concrete (RAC) utilization in China with entire local life cycle inventory (LCI) is performed, regarding the environmental influence of cement content, aggregate ...

Recycled Aggregates - Portland Cement Association

According to a 2004 FHWA study, 38 states recycle concrete as an aggregate base; 11 recycle it into new portland cement concrete. The states that do use recycled concrete aggregate (RCA) in new concrete report that concrete with RCA performs equal to concrete with natural aggregates.

Assessment of the surface permeation properties of ...

The water permeability, air permeability and surface permeability of recycled aggregate concrete (RAC) are compared with those of a control concrete made with natural aggregate. The study shows that the permeation properties of RAC depend on mix-design, conditions of curing and drying of samples.

Assessment of recycled aggregate concrete | Request PDF

Sustainability in the construction industry is a global concern, and one way of handling this is the idea of recycling old concrete rubbles in the production of fresh concrete. Recycled aggregate ...

Strength and Durability Evaluation of Recycled Aggregate ...

May 14, 2015· Mix proportioning for recycled aggregate concrete the same volumetric ratios of the control mix was adopted for the recycled aggregate, however, since different grades of the recycled aggregate with different particle sizes were available, the following approach was considered in the current study: (i) in case of mixes contain grades 1 and 2 ...

Evaluation of Recycled Concrete for Use as Aggregate in ...

Recycled concrete aggregate (RCA) produced from demolished pavements in three geographically-dispersed locations in Washington state were used to perform tests on aggregate characteristics, fresh concrete properties, and hardened concrete properties. Variables included the source of the RCA, percent replacement of coarse

(PDF) ASSESSMENT OF RECYCLED CONCRETE AGGREGATE …

Recycling concrete is a significant step towards eco-friendly construction practices. The use of recycled concrete aggregates in new structures provides a sustainable development. Initially, recycling of demolition waste was first carried out after

Assessment of durability of recycled aggregate concrete ...

Jan 30, 2007· Abstract. As more than 50% construction and demolition (C&D) wastes are composed of concrete debris in Hong Kong, recycling this debris into Recycled Aggregate (RA) for production of Recycled Aggregate Concrete (RAC) is an efficient way to alleviate the burden on landfill areas.

Review Article ASSESSMENT OF RECYCLED AGGREGATE …

Use of recycled aggregate in concrete can be useful for environmental protection and economical terms. Recycled aggregates are the materials for the future. The application of recycled aggregate has been started in many construction projects in many European, American and Asian countries. Many countries are giving many

Environmental Assessment of Two Use Cycles of Recycled ...

The main goal of this study was to compare two use cycles of natural aggregate concrete and recycled aggregate concrete, which is another way to compare the environmental impacts of recycled materials. A series of concrete mixtures with various replacement ratios of primary resources with recycled ones were prepared for this study. The mechanical properties of concrete mixtures were examined ...

Cyclic Testing and Assessment of Columns Containing ...

To investigate the seismic resistance of structural elements with recycled concrete aggregate, this research performs quasi-static cyclic testing on four full-scale reinforced concrete columns—two containing natural aggregate and two containing recycled concrete aggregate—under both axial and …

Assessment of Recycled Aggregate Concrete

application of recycled aggregate to use in construction activities have been practice by developed European countries and also of some Asian countries. This paper reports the results of an experimental study on the mechanical properties of recycled aggregate concrete (RAC) as compared to natural aggregate concrete (NAC).

Experimental Study of Compressive Strength of Recycled ...

Total four concrete mix batches were tested in which one mix was of normal aggregate concrete at 0% replaced by RCA and other are of Recycled aggregate concrete at 20%, 40% and 60% replaced by RCA. The result of the test are shown in the table 1.The compressive strength of the specimens was calculated by following formula.

ASSESSMENT OF RECYCLED AGGREGATE CONCRETE - CORE

The application of recycled aggregate to use in construction activities have been practice by developed European countries and also of some Asian countries. This paper reports the results of an experimental study on the mechanical properties of recycled aggregate concrete (RAC) as compared to natural aggregate concrete (NAC).

Life Cycle Assessment of Aggregates

system boundaries for the Life Cycle Assessment of aggregates, and the final versions of the modelling tools designed to carry out Life Cycle Assessment of primary and recycled aggregates, as commissioned by WRAP. The modelling tools‟ features and limitations are discussed and a detailed analysis of the modelling tools‟ performance is provided.

A review of life cycle assessment of recycled aggregate ...

Recycled aggregate has emerged expecting to address raw materials shortage in construction sector by converting waste concrete into resource. Many researchers adopted life cycle assessment (LCA) to evaluate and compare environmental impact of recycled aggregate concrete (RAC) and natural aggregate concrete (NAC).

ASSESSMENT OF RECYCLED AGGREGATE CONCRETE

Four series of mixes of control concrete with fresh aggregate and recycled concrete aggregate with three different ages of 5,10, and 15 years were prepared for the present study and used with ...

Environmental Assessment of Recycled Aggregate

The paper presents an environmental assessment of construction and demolition (C&D) waste production. The use of C&D waste carries a number of positive and negative aspects. These aspects should be compared to find the optimal way for recycled aggregate use. This study presents results of a fuel consumption survey of Czech recycling companies.

Comparative environmental assessment of natural and ...

The main purpose of this work is to determine the potential of recycled aggregate concrete (concrete made with RCA) to be used as structural concrete and to compare the environmental impact of the production of two types of ready-mixed concrete: natural aggregate concrete (NAC) made entirely with river aggregate (gravel and sand) and recycled ...

Sustainable Assessment of Recycled Concrete Aggregate (RCA ...

Sustainable Assessment of Recycled Concrete Aggregate (RCA) Used in Highway Construction. Due to the increased volume of construction and demolition wastes deposited in landfills in recent years, the transformation of recycling waste materials into useful products for re-application in highway construction projects is recommended.