properties of concretes with recycled aggregates

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Properties of concrete with recycled aggregates ...

Jan 01, 2013  Concretes with recycled concrete aggregate (RCA) content between 20 and 50%. As a general state, when limited amounts of coarse RCA are used, the mechanical and durability properties of recycled concretes are hardly affected.

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PROPERTIES OF CONCRETES WITH RECYCLED AGGREGATES ...

Jul 07, 2015  The recycled aggregate concretes exhibited 20% lower modules of elasticity than the natural aggregate concrete. The strength of the recycled concrete incorporating brick, as aggregate was not reduced until an incorporation of 40%. ABSTRACT. INTRODUCTION. PRODUCTION OF RECYCLED COARSE AGGREGATE. PROPERTIES OF COARSE AGGREGATES. PLAN OF THE ...

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Properties of recycled concrete aggregate and their ...

Jun 01, 2018  Another study Gokce et al. (2004) showed that concrete containing RCA made with recycled coarse aggregates derived from air-entrained concretes has better FT resistance than concrete made with RCA made with recycled coarse aggregate from non-air-entrained concrete after subjected to 500 FT cycles.

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Properties of concrete made with recycled aggregate from ...

May 01, 2003  The properties of recycled WPC concrete made with recycled aggregate crushed at age 3 days were significantly better than those of concretes made with aggregate crushed at age 1 or 28 days. Opposing trends were seen in recycled OPC concrete in which the new cement matrix was weaker than that of the WPC concrete at the same water to cement ratio.

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Properties of concretes bearing mixed recycled aggregate ...

Jun 01, 2021  That improvement in new concrete performance might be associated with fuller integration of the MRA in the cementitious matrix and the effect of the micro-properties (the low elastic modulus in particular) of the ITZ between the main components (bound mortar, unbound aggregate and masonry materials) of the recycled aggregate and the paste, as ...

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PROPERTIES OF CONCRETES WITH RECYCLED AGGREGATES ...

Jul 07, 2015  The recycled aggregate concretes exhibited 20% lower modules of elasticity than the natural aggregate concrete. The strength of the recycled concrete incorporating brick, as aggregate was not reduced until an incorporation of 40%. ABSTRACT. INTRODUCTION. PRODUCTION OF RECYCLED COARSE AGGREGATE. PROPERTIES OF COARSE AGGREGATES. PLAN OF THE ...

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Mechanical properties of the concrete containing recycled ...

Jul 30, 2017  Therefore, the concrete with recycled aggregates has lower strength than the concrete with natural aggregates. Using the steel fibers recovered from waste tires in the concrete with recycled aggregates improves the mechanical properties of this concrete as well as solving the environmental problem of these waste steel wires.

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Mix Design and Properties of Recycled Aggregate Concretes ...

Aug 26, 2014  This work is devoted to the study of fresh and hardened properties of concrete containing recycled gravel. Four formulations were studied, the concrete of reference and three concretes containing recycled gravel with 30, 65 and 100 % replacement ratios. All materials were formulated on the basis of S4 class of flowability and a target C35 class of compressive strength

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Some mechanical properties of normal and recycled ...

properties of concretes produced with recycled aggregates and normal aggregates for two di erent concrete classes (C20/25, C30/37). Tests of compressive strength, splitting

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Properties of Plain Concrete Produced Employing Recycled ...

Jul 10, 2017  The 100% substitution of natural aggregates (>10 mm) for recycled aggregates produced a decrease in concrete density of 9%, while concretes with 50 and 25% showed dry-density drops of 4 and 2%, respectively. Concrete density is highly dependent on the density of the recycled aggregates used, a fact which has been stated by several authors [3, 8].

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Crushed Concrete Aggregates - Properties and Uses of ...

Water absorption of recycled aggregate influence both fresh and hardened concrete properties. Recycled sand will be avoided, due to its absorption capacity, which would no doubt produce a shrinkage effect. Workability of recycled aggregate concretes is affected by the absorption capacity of the recycled aggregates. 5. Los Angeles Abrasion Loss

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(PDF) Micro-structural analysis of recycled concretes made ...

Three inorganic crystalline materials and recycled fine aggregates (0%, 10%, 20%, and 30% replacement of natural aggregates by weight) were used in the same cement-based composites.

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(PDF) Rheology of fresh concretes with recycled aggregates ...

Rheology of fresh concretes with recycled aggregates. Download. Rheology of fresh concretes with recycled aggregates. CRISTIAN jimenez. Carlo Pellegrino ... Concurrent effects of recycled aggregates and polypropylene fibers on workability and key strength properties of self-consolidating concrete. By Pierre Matar. Visualizing and simulating ...

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Mechanical and Durability Properties of Recycled Aggregate ...

The use of recycled concrete aggregates as an alternative aggregate material in concrete has been studied over the past two decades. It is now recognized that the recycled aggregate concrete (RAC), where natural aggregates are replaced with recycled concrete aggregates, is a promising technology for conserving natural resources and reducing the environmental impact of concrete.

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Mechanical Properties Of Aggregates

into aggregate mechanical properties are filled with recycled aggregate was thoroughly tested concretes tested in a material is observed to mechanical properties. The compressive performances of the recycled concrete with the different aggregate sizes were having similar

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Microstructural characterization of concrete prepared with ...

The results show that concretes with recycled aggregates exhibit typical microstructural features of the transition zone in normal strength concrete. Although overall porosity increases with increasing replacement, the interfacial bond is apparently stronger when recycled aggregates are used.

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The Influence of the Environment on the Properties of ...

This article presents the results of research that dealt with the development of non-traditional concrete using a hybrid alkali-activated cement. It is concrete based on by-products from a metallurgical plant that replaced 100% of the natural aggregates. Steel slag (CSS, fraction: 0/8 mm) was used as a filler in combination with air-cooled slag (ACBFS, fraction: 8/16 mm and 16/32 mm).

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Microstructural Characterization of Concrete Prepared with ...

The studied concretes were prepared by mixing fine recycled aggregates (FRA) with natural aggregates, type I Portland cement, and water . FRA were used to replace fine natural aggregates (FNA, sand) in extents of 10, 50, and 100 vol%, rendering in every case a total of 75.1 ± 1.0 wt% aggregates.

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INFLUENCE OF PLASTIC RECYCLED AGGREGATES IN THE

1 INFLUENCE OF PLASTIC RECYCLED AGGREGATES IN THE HARDENED PROPERTIES OF CONCRETES E. Hernández a b, M. Etxeberria * a Graduate School of architecture, National Autonomous University of Mexico. b Department of civil engineering, University Polytechnic of Catalonia. ABSTRACT The use of the new resource of man-made plastic aggregates as an alternative to natural

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PROCESSING AND PROPERTIES OF RECYCLED AGGREGATE

Normal properties of recycled coarse aggregates are a lower density, a lower elastic modulus and a higher absorption than natural coarse aggregates. These properties are due to the fact that the recycled coarse aggregates have partially adhered mortar which has

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(PDF) Mechanical properties of recycled aggregate concrete

Jul 27, 2017  Mechanical properties of demolishing waste [4], compressive strength [5], effect of fly ash [18], effect of cement proportion [21], effect of recycled aggregates on mix design [22], and durability ...

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Mechanical Properties Of Recycled Aggregates Concrete ...

2.7 RECYCLED AGGREGATE CONCRETE: A SUSTAINABLE BUILT ENVIRONMENT. In the present study the influence of recycled coarse aggregate (RCA) obtained from three different sources having different ages of structures are on the properties of recycled aggregate concrete (RAC) are investigated. RAC mixes are prepared with each source of RCA separately.

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Some Mechanical Properties of Normal and Recycled ...

This paper describes an experimental study conducted to investigate the properties of concretes produced with recycled aggregates and normal aggregates for two different concrete classes (C20/25, C30/37). Tests of compressive strength, splitting tensile strength, ultrasonic pulse velocity, rebound hammer, wet and dry density and freeze-thaw resistance were conducted on specimens of the concretes.

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Properties of Permeable Concrete Made by Recycled Aggregates

Apr 05, 2019  A brief literature study to gain high-strength and high-permeable concrete is carried to improve application of pervious concrete in construction. The goal of using recycled coarse aggregates is to reuse hardened concrete for economical construction and decrease environmental issues with its different applications.

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Mechanical and Durability Properties of Recycled Aggregate ...

The use of recycled concrete aggregates as an alternative aggregate material in concrete has been studied over the past two decades. It is now recognized that the recycled aggregate concrete (RAC), where natural aggregates are replaced with recycled concrete aggregates, is a promising technology for conserving natural resources and reducing the environmental impact of concrete.

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PERMEABILITY PROPERTIES OF FINE RECYCLED AGGREGATE

PERMEABILITY PROPERTIES OF FINE RECYCLED AGGREGATE CONCRETE Luís Evangelista1,3* and Jorge de Brito2,3 1 Associate Professor, TN - IKM, University of Stavanger, Postboks 8600 Forus 4036 Stavanger, Norway. E-mail: [email protected] 2 Full Professor, UL -Instituto Superior Técnico, Av. Rovisco Pais 1, 1049001 Lisboa, Portugal. 3 CERIS –ICIST, UL -Instituto Superior

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Investigation of Properties of Concrete Produced with ...

recycled aggregate ought to be 5% higher than that of traditional concrete. For the solid to be created with recycled aggregate , the sand - total proportion ought to be a similar proportion as the utilization of normal total. So as to acquire the necessary functionality and the water/cement proportion of the recycled aggregate, it is important to

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Mechanical and Durability Properties of Recycled Aggregate ...

and concretes with low, moderate, and high volumes of recycled aggregates, respectively. The aggregates were washed to remove the impurities and subsequently oven dried for 24 h at 105°C.

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Comparative study on the properties and high temperature ...

Similar as the previous studies [50,51], the water absorption and permeable voids of the SCC with recycled aggregates are higher than that of the NA because more pores and cracks are presented in the recycled aggregates. Among the recycled aggregates, the SCC-RBA has the highest water absorption, reaching 3.27 %.

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Metamorphosis in the Porosity of Recycled Concretes ...

In the field of construction, sustainable building materials are currently undergoing a process of technological development. This study aims to contribute to understanding the behavior of the fundamental properties of concretes prepared with recycled coarse aggregates that incorporate a polyethylene terephthalate (PET)-based additive in their matrix (produced by synthesis and glycolysis

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(PDF) Modeling of mechanical properties and durability of ...

Modeling of mechanical properties and durability of recycled aggregate concretes. Download. ... By Miquel Joseph. Influence of the Crushing Process of Recycled Aggregates on Concrete Properties. By Jorge Brito. Mechanical and durability performance of concrete incorporating fine recycled concrete and glass aggregates. By Kambiz Ramyar. My ...

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INFLUENCE OF PLASTIC RECYCLED AGGREGATES IN THE

1 INFLUENCE OF PLASTIC RECYCLED AGGREGATES IN THE HARDENED PROPERTIES OF CONCRETES E. Hernández a b, M. Etxeberria * a Graduate School of architecture, National Autonomous University of Mexico. b Department of civil engineering, University Polytechnic of Catalonia. ABSTRACT The use of the new resource of man-made plastic aggregates as an alternative to natural

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Properties of Plain Concrete Produced Employing Recycled ...

Jul 10, 2017  The 100% substitution of natural aggregates (>10 mm) for recycled aggregates produced a decrease in concrete density of 9%, while concretes with 50 and 25% showed dry-density drops of 4 and 2%, respectively. Concrete density is highly dependent on the density of the recycled aggregates used, a fact which has been stated by several authors [3, 8].

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