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workability of recycled concrete aggregate

workability of recycled concrete aggregate

Workability study of concretes made with recycled mortar ...

2013-1-22  The use of recycled aggregates (RA) for concrete production usually involves a reduction of the workability as measured by slump. This reduction is mainly due to higher absorption rates, rough-textured surfaces and particles with quite irregular shape from RA. Besides that, the slump test is a static test, whose result is influenced by its own weight and by internal friction between particles ...

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Workability and Early-Age Strength of Recycled

2021-6-2  Workability and Early-Age Strength of Recycled Aggregate Concrete Incorporating Basalt Fibers Shahrukh Shoaib1, Hilal El-Hassan1, Bilal El-Ariss1, Tamer El-Maaddawy1 1United Arab Emirates University, Department of Civil and Environmental Engineering P.O. Box

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Workability and Compressive Strength of Recycled ...

2017-12-6  内容提示: Workability and Compressive Strength of Recycled Concrete Waste Aggregate Concrete Rashid Ali 1, a and R. Hamid 2,b 1,2 Department of Civil and Structural Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia a [email protected], b [email protected], Keywords: recycled concrete waste aggregate ...

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WORKABILITY AND COMPRESSIVE STRENGTH

Experimental results indicated that for concretes containing recyled coarse aggregates, as cleanliness of the recycled aggregate particles decreased, workability and compressive strength decreased, whereas air content increased. For concretes containing recycled fines, workability generally increased with lower replacement level, and decreased with higher, whereas compressive strength decreased for all levels

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Sustainable Construction: Use of Recycled Concrete

2015-7-7  Experimental results indicated that for concretes containing recycled coarse aggregates, as cleanliness of the recycled aggregate particles decreased, workability and compressive strength decreased, whereas air content increased. For concretes containing recycled fines, workability generally increased with lower replacement level, and decreased with higher, whereas compressive strength

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Properties of High-Workability Concrete with Recycled ...

This study presents the effects of recycled concrete aggregate (RCA) on the key fresh and hardened properties of concrete. RCA was used to produce high-workability concrete substituting 0-100% ...

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Performance of Recycled Aggregate Concrete

2009-9-1  showed that the workability of recycled aggregate is lower than the workability of natural aggregate concrete ,the slump test was about 1.0cm slump for 60 % coarse recycled aggregate concrete and increases as the percent of recycled aggregate decreases . The compressive strength of recycled aggregate concrete with 60 % recycled aggregate, is

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Workability and Compressive Strength of Recycled

The recycled concrete waste aggregate (RCWA) was tested for grading, specific gravity, percent absorption and impact and crushing (% crushed). For the fresh concrete mix, slump and compaction factor test were carried out. Concrete samples are wet cured and

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Workability, strength, and microstructure of high strength ...

2021-7-1  This study examines the workability, strength, and microstructure of high strength eco-concrete incorporating recycled clay brick aggregate and calcined clay. The study adopted a design mixes proportioning of 1:1:2 by weight at a constant water/binder ratio of 0.25.

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Durability of recycled aggregate concrete - ScienceDirect

2013-3-1  The durability of the concretes made with recycled aggregate is worse due to the intrinsic porosity of them. These differences decrease for low w/c ratios, as in this case the most influential factor is the low porosity obtained in the new improved cement paste. Considering the mechanical properties, the influence of the recycled aggregate is worse for the high w/c ratios.

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Workability and Rheology of Fresh Recycled Aggregate

2016-10-2  The higher heterogeneity in terms of experimental slump measure occurs indeed when recycled aggregate concrete is tested. In this chapter, a review of the existing experimental methods for the evaluation of fresh concrete workability is given. Additionally, the behavior of fresh concrete is explored, aiming to understand which physical ...

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Workability and Compressive Strength of Recycled

Properties of aggregate and comparison of recycled aggregate concrete against natural aggregate concrete is performed according to requirements as such for its workability, compressive strength ...

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WORKABILITY AND COMPRESSIVE STRENGTH

WORKABILITY AND COMPRESSIVE STRENGTH PROPERTIES OF CONCRETE CONTAINING RECYCLED CONCRETE AGGREGATE. This paper describes two laboratory based experimental studies to determine some plastic and hardened properties of concrete incorporating recycled concrete aggregates. One study examined the effects that the cleanliness of recycled coarse ...

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Properties of High-Workability Concrete with Recycled ...

This study presents the effects of recycled concrete aggregate (RCA) on the key fresh and hardened properties of concrete. RCA was used to produce high-workability concrete substituting 0-100% ...

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EFFECT OF RECYCLED COARSE AGGREGATE ON

2019-7-12  workability of FRHSC was measured in terms of compaction factor and V-B time in fresh state of concrete. Double –L (push-off) specimens with inner dimension of 279.4mm X 203.2mm with a wall thickness of 12.7mm have been used to determine the shear strength. The effect of recycled coarse aggregate (RCA) on the workability and shear strength of

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Assessment of Recycled Aggregate Concrete

2018-12-14  workability of the concrete using recycled aggregate. 2. Evaluation of Recycled Aggregate Properties Recycled aggregate can be generated from demolished construction structure which comprises of broken members or components likes the slab, beam, brick wall and others. Since the quality data of these broken materials are often

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Properties of high-workability concrete with recycled ...

Keywords: hardened properties, natural coarse aggregate, recycled concrete aggregate, workability. 1. Introduction. Construction developments are on its peak in the 21 st century around the globe. There are numerous sky-scrapers, bridges, roads, underground tunnels,

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(PDF) The Design and Development of Recycled Concretes

2021-8-23  with recycled aggregate are workability (with 100% coarse aggregate r eplacement, it more than doubles compared with the reference concrete), the elastic modulus (decr eases by 42%

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A Comprehensive Review on Recycled Aggregate and

2021-8-1  Using recycled aggregates from construction and demolition waste can preserve natural aggregate resources, reduce demand of landfill, and contribute to sustainable built environment. This study provides a comprehensive review on recycled aggregate (RA) and recycled aggregate concrete (RAC) regarding their history, recycling, reuse and manufacture process, inherent defects (e.g.

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Durability And Performance Characteristics Of Recycled ...

2008-11-3  characteristics of fresh and hardened recycled aggregate concrete and natural aggregate concrete is relatively narrower han reported for laboratoryt -crushed recycled aggregate concrete mixes. For concrete without blast furnace slag, having similar volumetric mix proportions and workability,

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Workability and Compressive Strength of Recycled Concrete ...

Properties of aggregate and comparison of recycled aggregate concrete against natural aggregate concrete is performed according to requirements as such for its workability, compressive strength ...

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Properties of high-workability concrete with recycled ...

This study presents the effects of recycled concrete aggregate (RCA) on the key fresh and hardened properties of concrete. RCA was used to produce high-workability concrete substituting 0-100% natural coarse aggregate (NCA) by weight. The slump and

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Workability Retention and Strength Development of Self ...

Workability Retention and Strength Development of Self-Compacting Recycled Aggregate Concrete Using Ultrafine Recycled Powders and Silica Fume ... The analysis is presented, and the results show that up to 10% RP can be used considering its effect on the workability of concrete. Recommended.

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Recycling of Concrete (Recycling Coarse Aggregate)

2019-7-1  It has been observed that the recycled coarse aggregate is used as normal aggregate. The workability of the concrete is increased by using RCA. Maximum properties of Recycled coarse aggregate have shown good with a little variation. Recycled aggregate materials produce harsh mixes with lower workability than Natural aggregates.

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Effect of Metakaoline and Recycled Fine Aggregate on ...

2021-5-25  used as for replacement of natural fine aggregate in concrete using the optimum dose of metakaoline in concrete mix. Natural fine aggregate in concrete was replaced with 0%, 25%, 50%, 75%, and 100% of recycled fine aggregate. The workability was found to decrease as the percentage of recycled fine aggregate was increased.

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(PDF) The Design and Development of Recycled Concretes in ...

2021-8-23  with recycled aggregate are workability (with 100% coarse aggregate r eplacement, it more than doubles compared with the reference concrete), the elastic modulus (decr eases by 42%

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DOI: 10.1590/S1516-14392011005000039 Properties of

2020-1-19  *e-mail: [email protected] Properties of High-Workability Concrete with Recycled Concrete Aggregate Md. Safiuddina*, Ubagaram Johnson Alengaramb, Md. Abdus Salamb, Mohd Zamin Jumaat b, Fahrol Fadhli Jaafar , Hawa Binti Saadb aDepartment of Civil and Environmental Engineering, Faculty of Engineering, University of Waterloo, 200 University Avenue West, Waterloo,

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Special Issue "Advances in Recycled Aggregate Concrete"

The workability, mechanical properties, durability, and hydration products of the prepared concrete were analyzed. The results showed that when RP and RCA were used together, the workability of recycled concrete could fully meet the pumping demand in actual construction. When the mass replacement rate of RP was less than 30% and that of RCA was ...

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Durability And Performance Characteristics Of Recycled ...

2008-11-3  characteristics of fresh and hardened recycled aggregate concrete and natural aggregate concrete is relatively narrower han reported for laboratoryt -crushed recycled aggregate concrete mixes. For concrete without blast furnace slag, having similar volumetric mix proportions and workability,

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Strength and Durability Evaluation of Recycled Aggregate ...

2015-5-14  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.

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