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Enhancement of recycled aggregates and concrete by ...

Mar 29, 2021  Performance enhancement of recycled concrete aggregate – a review J. Cleaner Prod. , 112 ( 2016 ) , pp. 466 - 472 , 10.1016/j.jclepro.2015.08.057 Article

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(PDF) Enhancement of recycled aggregates and concrete by ...

Enhancement of recycled aggregates and concrete by combined treatment of spraying Ca2+ rich wastewater and flow-through carbonation March 2021 Construction and

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Enhancement of recycled aggregate concrete properties by a ...

However, using recycled concrete aggregate (RCA) in concrete involves various obstacles and controversial issues in controlling the quality of recycled

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Properties enhancement of recycled aggregate concrete ...

Aug 01, 2018  In this study, the intrinsic properties of recycled coarse aggregates (RC), associated with bonded mortar, were modified with two different pretreatment techniques

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Fast enhancement of recycled fine aggregates properties by ...

Abstract. Accelerated carbonation for recycled concrete aggregate (RCA) was one of the effective and economic solutions for improving the quality of RCA and its

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Flexural strength enhancement of recycled aggregate ...

Aug 01, 2021  Using recycled materials is a new method to manufacture reinforced concrete (RC) elements in civil engineering. Recycled materials come from different sources

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Performance enhancement of recycled concrete

Jan 20, 2016  Recycled concrete aggregate differ from natural aggregate as the former contains hardened cement mortar. The adhered cement mortar on recycled concrete aggregate

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Enhancement Treatment of Recycled Concrete Aggregate

Jul 22, 2021  Aggregate is an essential component in concrete, occupying 60–70% of the concrete by volume. Nevertheless, the application of natural aggregate (NA) is

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Performance Enhancement of Recycled Concrete Aggregates ...

Nov 11, 2015  The cement paste attached to natural aggregates has a significant effect on the quality of recycled concrete aggregates (RCAs) because it usually has higher

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Enhancement of properties of recycled coarse aggregate ...

4.4 Properties of fine and recycled coarse aggregate Locally available sand (fine aggregate) conforming to IS: 383-1970 [46] is collected from a nearby river and

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Enhancement of recycled aggregates and concrete by ...

Enhancement of recycled aggregates and concrete by combined treatment of spraying Ca 2+ rich wastewater and flow-through carbonation. / Fang, Xiaoliang; Zhan, Baojian; Poon, Chi Sun. In: Construction and Building Materials, Vol. 277, 122202, 29.03.2021. Research output: Journal article publication › Journal article › Academic research ...

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Enhancement of recycled aggregate concrete properties by a ...

The quality of Recycled Aggregate (RA) concrete having 100% coarse RCA got improved by using pozzolanic and sodium silicate solution as new treatment solutions. At 20% concentration of sodium ...

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Performance Enhancement of Recycled Concrete Aggregates ...

Nov 11, 2015  The cement paste attached to natural aggregates has a significant effect on the quality of recycled concrete aggregates (RCAs) because it usually has higher porosity and lower strength than natural aggregates. This work attempted to improve the quality of RCAs through carbonation of the attached cement paste.

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Enhancement of properties of recycled coarse aggregate ...

Enhancement of properties of recycled coarse aggregate concrete using bacteria. Due to rapid construction, necessity for raw materials of concrete, especially coarse aggregate, tends to increase the danger of early exhaustion of the natural resources. An alternative source of raw materials would perhaps delay the advent of this early exhaustion.

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Performance enhancement of recycled concrete aggregate-A ...

The utilization of recycled aggregate (RA) in concrete is one such attempt. Generally, use of RA is restricted to lower grade applications because of its strength and durability problems. The use ...

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Performance Enhancement of Recycled Concrete Aggregates ...

AbstractThe cement paste attached to natural aggregates has a significant effect on the quality of recycled concrete aggregates (RCAs) because it usually has higher porosity and lower strength than natural aggregates. This work attempted to improve the quality of RCAs through carbonation of the attached cement paste. During carbonation reactions, CO2 reacted with Ca(OH)2 and calcium silicate ...

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Performance Enhancement of Recycled Concrete

the recycled crushed stone concrete aggregate (C-RCA) was re- trieved from concrete beams with compressive strength of 50 MPa. The gravel from a river was crushed and used as the control find

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Enhancement of properties of recycled coarse aggregate ...

Enhancement of properties of recycled coarse aggregate concrete (RCAC) using non-ureolytic bacteria (non-UB) : A Review 1Sonia Das, 2Abhishek Sharma 1M.Tech. Scholar, 2Assistant Professor Civil Engineering Department Structural Engineering CBS Group of Institutions

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Performance Enhancement of Recycled Concrete Aggregates ...

Mar 18, 2015  The sequestration of carbon dioxide into recycled aggregates for the enhancement of recycled aggregate concrete has provided an abundance of potential over recent years. The

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Chemico-thermal treatment for quality enhancement of ...

May 29, 2019  Utilization of recycled concrete fine aggregates to full potential in the construction sector is necessary to increase the ecological value and solves the issues of natural sand scarcity. However, the quality of recycled concrete fine aggregates is inferior to conventional aggregates. Hence, a treatment process is obviously essential for improving the quality of recycled concrete fine ...

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Critical Review of Recycled Aggregate Concrete Properties ...

Nov 11, 2020  Although the properties of recycled aggregate concrete are widely considered to be inferior to those of natural aggregate concrete, research in the field still is of merit due to growing awareness of environmental concerns relating to the concrete construction and demolition industry. In addition, some methods have been proposed to improve the ...

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Mechanical Performance of Concrete Made with Recycled ...

Sep 15, 2020  This research aims at analysing the mechanical performance of concrete with recycled aggregates from concrete pavements. First, the characteristics of various natural and recycled aggregates used in the concrete were thoroughly analysed. The composition of the recycled aggregates was determined and several physical and chemical tests of the aggregates were

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Frontiers Performance Enhancement of Permeable Asphalt ...

Sep 16, 2020  The incorporation of recycled concrete aggregate (RCA) in permeable asphalt mixtures (PAMs) is an efficient method of utilizing construction demolished waste. It not only conforms to the trend of building sponge cities, but also alleviates the problem of overexploitation of natural aggregate resources. As the performance of PAM containing recycled aggregate is not comparable to natural ...

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MICROBIAL CARBONATE PRECIPITATION IN RECYCLED

Aggregates to be used to see the effects that recycled aggregates makes on the strength of the concrete as we can derive from the Literature review that we can replace the Natural Aggregates by Waste concrete aggregates to between 20%-30% and it won’t make any effect on the strength of concrete.

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Enhancement of properties of recycled coarse aggregate ...

Enhancement of properties of recycled coarse aggregate concrete using bacteria. Due to rapid construction, necessity for raw materials of concrete, especially coarse aggregate, tends to increase the danger of early exhaustion of the natural resources. An alternative source of raw materials would perhaps delay the advent of this early exhaustion.

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Enhancement of properties of recycled coarse aggregate ...

Recycled coarse aggregate Concrete that has been removed is often seen as worthless and dumped as demolition material after the destruction of ancient roadways and structures. Used concrete aggregates (RCAs) are created by removing old concrete from the ground and breaking it down (Fig 1).

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Enhancement of properties of recycled coarse aggregate ...

Enhancement of properties of recycled coarse aggregate concrete (RCAC) using non-ureolytic bacteria (non-UB) : A Review 1Sonia Das, 2Abhishek Sharma 1M.Tech. Scholar, 2Assistant Professor Civil Engineering Department Structural Engineering CBS Group of Institutions

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Performance Enhancement of Recycled Concrete Aggregates ...

Performance Enhancement of Recycled Concrete Aggregates through Carbonation. The cement paste attached to natural aggregates has a significant effect on the quality of recycled concrete aggregates (RCAs) because it usually has higher porosity and lower strength than natural aggregates.

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Enhancement of properties of recycled coarse aggregate ...

Due to rapid construction, necessity for raw materials of concrete, especially coarse aggregate, tends to increase the danger of early exhaustion of the natural resources. An alternative source of raw materials would perhaps delay the advent of this early exhaustion. Recycled coarse aggregate (RCA) plays a great role as an alternative raw material that can replace the natural coarse aggregate ...

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(PDF) ENHANCEMENT IN PROPERTIES OF CONCRETE WITH ...

The construction industry is one of the biggest and most active sector for utilization of recycled demolished concrete in vigorous applications. In the present work, experimental investigation carried out to evaluate the effect of partial replacement

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Recycled Aggregates - Portland Cement Association

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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Evaluation on the Mechanical Performance of Low-Quality ...

recycled aggregates in order to expand the distribution of recycled aggregates generated from concrete waste in Japan, and there have been advances in the recycling system for concrete (Choi et al. 2012). However, low-quality recycled aggregates manufactured by simple processing is a major cause of reduced concrete performance, and low quality is

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(PDF) RECYCLED CONCRETE AGGREGATE (RCA) FOR THE USE IN ...

Table. 3 Overall Summary (Based on some research) Aspects Recycled Concrete Natural Concrete Aggregate Aggregate Crushing Value 33 % higher Normal Soundness loss 28,1 %-49 % 9,1 --2,6 % Water Ansorption 0,3%-0,32% 0,29 %-0,3% [Tusher] Compression 20 % lower than - Strength NAC 0,05-0,1 lower 13 A d v a n c e C o n c r e t e M a t e r i a l s ...

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Durability Studies on the Recycled Aggregate Concrete in ...

Jul 28, 2019  Since China hosted the Olympic Games in 2008, a mass of construction and demolition (CD) wastes were produced with the rapid urbanization construction. Recycling the CD waste into recycled aggregates (RA) is an effective method for reducing the amount of CD wastes. Many studies on the properties of RA and the durability of recycled aggregate concrete (RAC) were conducted in

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Incorporation of Perlite and Recycled Aggregates for ...

Fresh concrete and hardened concrete properties were evaluated. Results revealed that the incorporation of pre-wetted/saturated perlite and recycled aggregates can lead to significant enhancement in concrete workability and durability through reduced shrinkage. An enhancement of concrete strength at various stages was recorded, and ...

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Recycled Aggregate Concrete including Various Contents of ...

Dec 17, 2020  Natural coarse aggregate and recycled coarse aggregate were used in this study. The former was river aggregate (gravel). The maximum aggregate size is 20 mm. It had absorption capacity of 1.1% and specific density of 2.64. The coarse recycled aggregate was recycled concrete-based aggregate derived from crushing old concrete structural elements.

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MICROBIAL CARBONATE PRECIPITATION IN RECYCLED

Aggregates to be used to see the effects that recycled aggregates makes on the strength of the concrete as we can derive from the Literature review that we can replace the Natural Aggregates by Waste concrete aggregates to between 20%-30% and it won’t make any effect on the strength of concrete.

Get price

First Graphene Ltd. Technical Article GRAPHENE ENHANCED ...

Recycled Aggregate Concrete (RAC) was investigated. PureGRAPH® graphene concrete additives were dispersed with superplasticiser in water to prepare a cement mortar and then RAC concrete prepared. An enhancement in RAC performance was achieved by washing the recycled aggregate and doping the cement mortar with 0.01%w/w of PureGRAPH®

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