the effect of recycled aggregate quality on concrete

EFFECT OF RECYCLED CONCRETE AGGREGATE QUALITY ON ...

Jul 14, 2020  The objective of this study is to investigate the effect of recycled concrete aggregate (RCA) quality on the properties of hardened concrete properties such as compressive strength, splitting tensile strength, density, water absorption capacity and porosity accessible to water. The RCA used in this study was obtained from the crushing of waste ...

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The Effect of Recycled Aggregate Quality on Concrete ...

The Effect of Recycled Aggregate Quality on Concrete Properties 1Salahaldein Alsadey and 2Abdelnaser Omran and 1Issa Amaish 1Department of Civil Engineering, Faculty of Engineering, Bani Waleed University, Libya 2Faculty of Engineering Sciences, Bright Star University, El Breqa, Libya Key words: Recycled aggregate, recycled aggregate concrete, mechanical properties, flexural test,

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The Effect of Recycled Aggregate Quality on Concrete ...

The Effect of Recycled Aggregate Quality on Concrete Properties. Abstract: Waste from construction and demolition are one of the main types of wastes produced worldwide. The aim of this study is to lessen the environmental problems produced by the dumping of waste from construction and demolition. This study presents a comparative analysis of ...

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The effect of recycled concrete aggregate properties on ...

Oct 01, 2011  Due to the high percentage of coarse aggregate used in concrete, a sustainable and economical source of high quality aggregate is essential to the concrete industry. However, recent studies have shown that economically viable natural aggregate sources in some regions, including Ontario, are in decline [3] , [4] , [5] .

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Effect of recycled concrete aggregates on strength and ...

produced in a quality-controlled environment, and contains little or no deleterious materials. The repetitive construction environment for precast concrete would also allow the effects of RCA to be closely monitored and controlled. Ultimately, Effect of recycled concrete aggregates on strength and stiffness gain of concrete and on bond strength

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Effect of Recycled Coarse Aggregate Type on Concrete ...

May 13, 2014  Using multilinear correlation analysis, the influences of these aggregate characteristics and other parameters on the properties of recycled aggregate concrete were evaluated. The results showed that the performance of the concrete containing each type of RA was largely influenced by the aggregate nature and quality, in addition to attached ...

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Study of recycled concrete aggregate quality and its ...

achieve a full understanding of recycled concrete . aggregates and propose a design methodology for structural recycled concrete, based on the physical-mechanical properties of recycled concrete coarse aggregates studied using the database. The quality of recycled aggregate concrete depends on the properties of the recycled aggre-gates.

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Quality Improvement of Recycled Aggregate Concrete using ...

the recycled aggregate application in lower grade concrete work is observed. However, the effect of recycled aggregate on the strength and durability of concrete restricts its use in higher-grade work. This paper presents a series of tests carried out on recycled coarse aggregate (RCA) and recycled coarse aggregate concrete (RCAC) and test ...

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The Environmental Impact of Recycled Concrete

4. Characteristics of recycled concrete aggregate The international literature provided numerous works at recycled concrete aggregate area, mainly from the beginning of 1980 (Hansen, 1992). The topics most investigated are durability and mechanical characteristics. The quality of aggregates made of recycled concrete affects directly the

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Quality Improvement Techniques for Recycled Concrete ...

The main problem in using recycled concrete aggregate (RCA) as a construction material is due to the weak adhered mortar which usually has higher porosity and water absorption. It also has lower strength compared to natural aggregate (NA), and it often forms weak interfacial transition zones in the recycled aggregate concrete (RAC). These weak ...

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The Effect of Recycled Aggregate Quality on Concrete ...

The Effect of Recycled Aggregate Quality on Concrete Properties 1Salahaldein Alsadey and 2Abdelnaser Omran and 1Issa Amaish 1Department of Civil Engineering, Faculty of Engineering, Bani Waleed University, Libya 2Faculty of Engineering Sciences, Bright Star University, El Breqa, Libya Key words: Recycled aggregate, recycled aggregate concrete, mechanical properties, flexural test,

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The Effect of Recycled Aggregate Quality on Concrete ...

The Effect of Recycled Aggregate Quality on Concrete Properties. Abstract: Waste from construction and demolition are one of the main types of wastes produced worldwide. The aim of this study is to lessen the environmental problems produced by the dumping of waste from construction and demolition. This study presents a comparative analysis of ...

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Effect of the Quality of Recycled Aggregate on Compressive ...

Effect of the Quality of Recycled Aggregate on Compressive Strength of Recycled Aggregate Concrete . M. 2Chakradhara Rao1, Ramnarayan . 1,2Civil Engineering Department, Institute of Technology, Guru Ghasidas Vishwavidyalaya (A Central university), Bilaspur, C.G., India – 495 009 . raoakradhar[at]gmail, rnbphoolasar99[at]gmail

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EFFECT OF RECYCLED AGGREGATE QUALITY ON

The effect of recycled aggregates on compressive strength was found to decrease as water-cement ratio increases; at water-cement ratio of 30, recycled aggregate concrete has only 76.2% of the strength of normal aggregate concrete, but this percentage increases to 77.5% and 83.9% for waters -cement ratio of 50 and 70, respectively.

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Effect of Low-Quality Recycled Concrete Aggregate on ...

Aug 08, 2020  Recycled concrete aggregate (RCA) is the result of the demolition of concrete structures and pavements. Using RCA to replace quarried aggregates in paving projects is one way to utilize the millions of tons of concrete waste that is produced annually and landfilled.

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Study of recycled concrete aggregate quality and its ...

achieve a full understanding of recycled concrete . aggregates and propose a design methodology for structural recycled concrete, based on the physical-mechanical properties of recycled concrete coarse aggregates studied using the database. The quality of recycled aggregate concrete depends on the properties of the recycled aggre-gates.

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Effect of Using Recycled Concrete as Coarse Aggregate on ...

utilization of recycled coarse aggregate in concrete, durability of recycled coarse aggregate concrete can be increased. The test results by Chen et al. [2003] showed that building debris could be converted into useful recycled aggregates through suitable treatment. Strength of concrete would be affected by using unwashed recycled aggregates.

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Recycled Aggregates - Cement

Recycled Aggregate Characteristics. The crushing characteristics of hardened concrete are similar to those of natural rock and are not significantly affected by the grade or quality of the original concrete. Recycled concrete aggregates produced from all but the poorest quality original concrete can be expected to pass the same tests required ...

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Quality Improvement of Recycled Aggregate Concrete

the recycled aggregate application in lower grade concrete work is observed. However, the effect of recycled aggregate on the strength and durability of concrete restricts its use in higher-grade work. This paper presents a series of tests carried out on recycled coarse aggregate (RCA) and recycled coarse aggregate concrete (RCAC) and test ...

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Quality Improvement Techniques for Recycled Concrete ...

The main problem in using recycled concrete aggregate (RCA) as a construction material is due to the weak adhered mortar which usually has higher porosity and water absorption. It also has lower strength compared to natural aggregate (NA), and it often forms weak interfacial transition zones in the recycled aggregate concrete (RAC). These weak ...

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

This study evaluated the use of recycled concrete as coarse aggregate in new concrete pavements. Recycled concrete aggregate (RCA) produced from demolished pavements in three geographically-dispersed locations in Washington state were used to perform testson aggregate characte ristics, fresh concrete propertiesand hardened concrete properties.

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Use of Recycled Concrete Aggregate in PCCP: Literature

Properties and Characteristics of Recycled Concrete Aggregate A concrete pavement’s strength and performance is very dependent on the aggregates used to produce the concrete. Recycled concrete aggregates are different in many ways from virgin aggregates as shown in Table 1. Table 1. Comparison of typical virgin aggregate and recycled concrete ...

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Properties of recycled aggregate and recycled aggregate ...

Jan 27, 2018  In the present investigation, an attempt was made to study the influence of the strength of parent concrete on the properties of recycled aggregates and recycled aggregate concrete. In this study, four grades of normal concrete mixes: M20, M25, M30, and M40 were considered as parent concrete to produce the recycled coarse aggregates and recycled aggregate concrete.

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Effect of Recycled Coarse Aggregate on Concrete Properties ...

The replacement of recycled aggregate on concrete will decrease the characteristic Strength. In the context of Batch 1, the characteristic Strength for 0% was 29.58 MPa, 35% Recycled Aggregate was 27.27 MPa, 50%. Recycled Aggregate was 25.27 MPa and 65% Recycled Aggregate was 23.08 MPa.

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The effect of recycled concrete aggregate properties on ...

Oct 15, 2011  Concerning concrete recycling, demand for roadbeds and backfill tends to be less than the amount of dismantled concrete generated in a single rural site, and conventional recycled aggregate is limited of its use to non-structural concrete, because of its inferior quality to ordinary natural aggregate.

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Effect of the Quality of Recycled Aggregate on Compressive ...

Effect of the Quality of Recycled Aggregate on Compressive Strength of Recycled Aggregate Concrete . M. 2Chakradhara Rao1, Ramnarayan . 1,2Civil Engineering Department, Institute of Technology, Guru Ghasidas Vishwavidyalaya (A Central university), Bilaspur, C.G., India – 495 009 . raoakradhar[at]gmail, rnbphoolasar99[at]gmail

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Study of recycled concrete aggregate quality and its ...

achieve a full understanding of recycled concrete . aggregates and propose a design methodology for structural recycled concrete, based on the physical-mechanical properties of recycled concrete coarse aggregates studied using the database. The quality of recycled aggregate concrete depends on the properties of the recycled aggre-gates.

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Effect of recycled concrete aggregates on strength and ...

“The Effect of Recycled Concrete Aggregate Properties on the Bond Strength between RCA Concrete and Steel Reinforcement.” Cement and Concrete Research 41 (10): 1037– 1049. Topcu, I. B., and S. Sengal. 2004. “Properties of Concretes Produced with Waste Concrete Aggregate.” Cement and Concrete Research 34 (8): 1307–1312.

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Effect of Recycled Concrete Aggregate Properties on the ...

promising approach to mix-proportion eco-friendly recycled concrete mixes. Moreover, the RCA type and properties seem to influence in the behaviour of RCA concrete and thus should be accounted in the mix- design. KEYWORDS: Recycled Concrete Aggregates (RCA), Mix- design methods, Equivalent volume (EV), Waste management, RCA quality control.

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Effect of Using Recycled Concrete as Coarse Aggregate on ...

utilization of recycled coarse aggregate in concrete, durability of recycled coarse aggregate concrete can be increased. The test results by Chen et al. [2003] showed that building debris could be converted into useful recycled aggregates through suitable treatment. Strength of concrete would be affected by using unwashed recycled aggregates.

get price

Recycled Aggregates - Cement

Recycled Aggregate Characteristics. The crushing characteristics of hardened concrete are similar to those of natural rock and are not significantly affected by the grade or quality of the original concrete. Recycled concrete aggregates produced from all but the poorest quality original concrete can be expected to pass the same tests required ...

get price

Quality Improvement of Recycled Aggregate Concrete

the recycled aggregate application in lower grade concrete work is observed. However, the effect of recycled aggregate on the strength and durability of concrete restricts its use in higher-grade work. This paper presents a series of tests carried out on recycled coarse aggregate (RCA) and recycled coarse aggregate concrete (RCAC) and test ...

get price

Use of Recycled Concrete Aggregate in PCCP: Literature

Properties and Characteristics of Recycled Concrete Aggregate A concrete pavement’s strength and performance is very dependent on the aggregates used to produce the concrete. Recycled concrete aggregates are different in many ways from virgin aggregates as shown in Table 1. Table 1. Comparison of typical virgin aggregate and recycled concrete ...

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Using Recycled Concrete as Aggregate - Civil Engineering Notes

Aug 13, 2020  What is Recycled Concrete Aggregate. Recycled concrete as aggregate is nothing but aggregates produced from the previously used construction material such as masonry or concrete. Recycled aggregates consist of hard, graduated fragments of inert materials, which include sand, crushed stone, rock dust, gravel, slag or powder.

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Effect of Recycled Aggregate on Mechanical and Durability ...

Aggregate Concrete formed with air-dried Reusing Aggregate and Reusing Aggregate Concrete prepared with saturated surface dry (SSD) Recycling Aggregate. It was seen that SSD RA have the lower compressive strength and the reason behind this anomaly is loss of adsorbed water in presoaked aggregate in fresh concrete [21].

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Concept of Green Concrete Using Construction Demolished ...

use of recycled aggregate concrete is studied. Recycled coarse aggregate (RCA) obtained from ... depending on quality, shape and size of aggregates used in concrete. The natural recourses are decrease in ... recycled aggregate is lighter than natural aggregate. This is the general effect that will reduce the strength of reinforced concrete.

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Environmental Suitability of Recycled Concrete Aggregates ...

investigated the effects of freeze/thaw cycles, curing time, liquid-to- solid ratio, pH, and particle sizes on the leaching behavior of metals leached from RCA materials. MATERIALS Two conventional graded aggregate base (GAB) materials and two recycled concrete aggregate materials were used in

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Use of Recycled Aggregates in Construction

Expanded clay lightweight aggregate. Structural grades concrete. Not available. Recycled Aggregates Recycled Concrete Aggregate (RCA) Crushed sound and clean waste concrete of at least 95% by weight of concrete with typical total contamination lower than 1% of the bulk mass. Class 1A RCA is a well graded RCA with no more than 0.5% brick content.

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