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evaluation of precoated recycled concrete aggregate for

evaluation of precoated recycled concrete aggregate for

Evaluation of pre-coated recycled concrete aggregate for ...

Mar 01, 2012  Highlights We produce pre-coated recycled concrete aggregate (PCRCA). It can ease aggregate shortage and reinforce the strength. The optimum coating thickness is 0.25 mm. The PCRCA have highly pores contents, water absorption and asphalt contents. The tests of HMA with PCRCA are satisfied by the specification requirements.

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Evaluation of pre-coated recycled aggregate for concrete ...

Jun 01, 2013  The test results show that physical performance of pre-coated recycled aggregate was within the range of specification requirement and surface-coated recycled aggregate with paste thickness of 0.035 mm resulted in a higher physical performance. In addition, compressive strength of concrete increased as the water to cement ratio of coating paste ...

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Evaluation of pre-coated recycled concrete aggregate for ...

Highlights We produce pre-coated recycled concrete aggregate (PCRCA). It can ease aggregate shortage and reinforce the strength. The optimum coating thickness is 0.25 mm. The PCRCA have highly pores contents, water absorption and asphalt contents. The tests of HMA with PCRCA are satisfied by the specification requirements.

get price

Evaluation of pre-coated recycled aggregate for concrete ...

Highlights The physical performance of modified recycled aggregate was satisfied with specification requirement. Too much or less coating paste both reduced aggregate crushing strength and optimum coating thickness was 0.035 mm. Sulfoaluminate cement paste with fly ash can improve the mechanical property and durability of recycled concrete or mortar.

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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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Performance Evaluation of Concrete Manufactured with ...

Keywords: reclaimed fine aggregate, precoated aggregate, slag, durability In this study, fly ash and ground granulated blast-furnace slag were applied over fine recycled aggregates in layers of 0.2 and 0.4 mm. We then evaluated the resulting concrete with regard to freshness, mechanical properties, and durability. The fine recycled aggregates ...

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Evaluation of Recycled Concrete, Open-Graded Aggregate ...

92 TRANSPORTATION RESEARCH RECORD 1345 Evaluation of Recycled Concrete, Open-Graded Aggregate, and Large Top-Size Aggregate Bases RICHARD D. BARKSDALE, SAMIR Y. ITANI, AND TERRYE. SWOR Eight unstabilized aggregate ba es were investigated: three re

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Evaluation of the double coated recycled concrete ...

May 30, 2018  The recycled aggregates consisted of 83.4% of crushed recycled concrete, 7.8% of high-density brick and tile and about 7% of recycled asphalt pavement (RAP). The remainder solid waste were metals, glass, ceramics, plastic, plaster and organic matters.

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Performance of Recycled Aggregate Concrete

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 about 76 % of natural aggregate concrete. The compressive strength increases as the

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Sensors and Materials

Keywords: reclaimed fine aggregate, precoated aggregate, slag, durability In this study, fly ash and ground granulated blast-furnace slag were applied over fine recycled aggregates in layers of 0.2 and 0.4 mm. We then evaluated the resulting concrete with regard

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EVALUATION OF RECYCLED CONCRETE AGGREGATE

EVALUATION OF RECYCLED CONCRETE AGGREGATE PRODUCED FROM DEMOLISHED RUNWAY PANELS AS A SUBSTITUTE FOR COARSE AGGREGATES IN NEW PORTLAND CEMENT PAVEMENTS Abstract by Timothy Charles Spry, M.S. Washington State University July 2013 Committee Co-Chairs: David McLean and Haifang Wen

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Performance Evaluation of Concrete Manufactured with ...

Keywords: reclaimed fine aggregate, precoated aggregate, slag, durability In this study, fly ash and ground granulated blast-furnace slag were applied over fine recycled aggregates in layers of 0.2 and 0.4 mm. We then evaluated the resulting concrete with regard to freshness, mechanical properties, and durability. The fine recycled aggregates ...

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Research Note: Evaluation of Recycled Concrete as ...

Evaluation of Recycled Concrete as Aggregate in New Concrete Pavements, WA-RD 826.1 Researchers Haifang Wen and David McLean, Professors Spencer Boyle, Tim Spry, and Danny Mjelde, former graduate students Washington State University 509-335-2513, [email protected] 970-491-3366 [email protected] Research Manager

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Performance Evaluation Of Recycled Aggregate Used In Concrete

There were total of sixth batches of concrete mixes, consists of every 20 % increment of recycled aggregate replacement from 0 % to 100%.Moreover, 100 % of recycled aggregate mix batches included, different water/cement ratio of 0.5,0.6 and 0.7. The workability of concrete considerably reduced as the amount of recycled aggregate increased.

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Evaluation of Recycled Concrete, Open-Graded Aggregate ...

92 TRANSPORTATION RESEARCH RECORD 1345 Evaluation of Recycled Concrete, Open-Graded Aggregate, and Large Top-Size Aggregate Bases RICHARD D. BARKSDALE, SAMIR Y. ITANI, AND TERRYE. SWOR Eight unstabilized aggregate ba es were investigated: three re

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Evaluation of recycled concrete aggregate in asphalt mixes ...

Jan 15, 2018  This paper investigates the feasibility of using recycled concrete aggregate (RCA) as a replacement to the natural aggregates (NAs) in hot mix asphalt (HMA). RCA was collected from two different sources (new concrete cubes used for quality control testing during construction, and old demolished building) to investigate the impact of material degeneration on the engineering properties

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Laboratory and Field Evaluation of Lightweight Aggregates ...

13. Lightweight aggregate "A" is considered equal to precoated limestone for seal coat and surface treatment work. Laboratory results indicate that several of the other lightweight aggregates under study are also acceptable for this and similar service-Re commendations Based on the laboratory and field evaluation work performed during the

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Carbonation degree evaluation of recycled aggregate ...

Jan 01, 2021  The water in the recycled aggregate provides an internal curing environment for the cement paste [30,51] because the recycled aggregate absorbs some of the total mixing water. Thus, different recycled aggregates offer different amounts of water for cement hydration, and if the same effective water/cement ratio is used during mixture preparation ...

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Utilization of Recycled Concrete Aggregates in Stone ...

Recycled concrete aggregate (RCA) is considered as one of the largest wastes in the entire world which is produced by demolishing concrete structures such as buildings, bridges, and dams. It is the intention of scientists and researchers, as well as people in authority, to explore waste material recycling for environmental and economic advantages.

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Feasibility of using recycled concrete aggregates for half ...

Jun 16, 2018  The present study describes a laboratory investigation on the feasibility of reusing construction and demolition waste as recycled concrete aggregate (RCA) to manufacture half-warm mix asphalt (HWMA) instead of natural aggregates. In this investigation, semi-dense HWMA for the binder course, type AC 22 bin S, was analysed. Percentages of 0 (control mixture), 55, and 100% RCA were

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Strength evaluation of recycled-aggregate concrete by ...

Materials and Structures/ MatOriaux et Constructions, 1988, 21,289-295 Strength evaluation of recycled-aggregate concrete by in-situ tests R. SRI RAVINDRAJAH, Y. H. LOO, C. T. TAM

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[PDF] Porosity of recycled concrete with substitution of ...

In this paper, we present the experimental analysis of samples of recycled concrete (RC) with replacement of natural aggregate (NA) by recycled aggregate originating from concrete (RCA). The results of the tests of mechanical properties of RC were used for comparison with tests of mercury intrusion porosimetry (MIP), in which the distribution of the theoretical pore radius, critical pore ratio ...

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[PDF] Influence of fine recycled concrete aggregates on ...

Abstract Fine recycled concrete aggregates (FRCA) also called recycled sand, having particle sizes smaller than 5 mm, are essentially composed of mortar and hardened cement paste. Therefore they induce a large water demand which makes them hard to recycle into mortar and concrete. In this paper, the properties of mortars containing FRCA have been studied, including fresh properties, mechanical ...

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Study on Plastic Coated Overburnt Brick Aggregate as an ...

Aug 08, 2016  There are different places in India where natural stone aggregates are not available for constructional work. Plastic coated OBBA can solve the problem of shortage of stone aggregate to some extent. The engineers are always encouraged to use locally available materials. The present investigation is carried out to evaluate the plastic coated OBBA as an alternative material for bituminous road ...

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

such alternative is to incorporate recycled concrete as aggregate in new portland cement concrete pavements. According to a report from Iowa State University, recycled concrete aggregates (RCA) can reduce costs, environmental impacts, and project delivery time when used in concrete pavements (Garber, et al., 2011).

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Evaluation of Recycled Concrete Aggregate Performance in ...

In total, 48 beam-end specimens were tested that incorporated three bonded lengths (125, 375, and 450 mm) and four concrete compressive strengths (30, 40, 50 and 60 MPa). Based on the results of the aggregate testing it was found that concrete incorporating pre-soaked (i.e., fully saturated) RCA as a 100% replacement for natural aggregate had ...

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Evaluation of coarse recycled concrete aggregates effect ...

May 10, 2021  This study presented is interested to identify the influence of the use of recycled concrete aggregates (RCA) on mechanical properties (compressive strength, tensile and Modulus of elasticity), rheological properties (workability, yield stress, and plastic viscosity), and total shrinkage of concrete. Coarse ordinary aggregates (COA) are partially substituted with RCA and an amount of ...

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DeepDyve - Unlimited Access to Peer-Reviewed Journals

DeepDyve is the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

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Evaluation of the Durability Properties of Engineered ...

Nov 17, 2020  This study showed that the use of recycled concrete as aggregate up to 100% replacement of the silica sand resulted in about a 40% reduction in drying shrinkage. However, chloride ion penetration, permeable voids, and water absorption of ECC mixtures incorporating 100% recycled concrete as aggregate increased by 19%, 28%, and 34%, respectively.

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Utilization of recycled concrete aggregates in stone ...

Jan 01, 2014  In another study, the possibility of using precoated RCA for hot mix asphalt was evaluated. 0.25, 0.45, and 0.65 mm of slag cement paste was used to coat the recycled concrete aggregates. Test results showed that the thickness of 0.25

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Quantitative evaluation of interfacial transition zone of ...

Dec 12, 2020  Utilizing steel slag and recycled concrete as fine aggregate could save the consumption of natural resource and reduce the environmental pollution. In this work, the effect of steel slag aggregate and recycled aggregate on the compressive strength and chloride migration coefficient of three types of concretes were investigated and compared with ...

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Standards Specifications for Transportation Materials and ...

R 73-16 (2020) Evaluation of Precast Concrete Drainage Products 2 (June) R 82-17 Pipe Joint Selection for Highway Culvert and Storm Drains 2 (June) R 93-19 Service Life Determination of Corrugated HDPE Pipes Manufactured with Recycled

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Durability Indicators in High Absorption Recycled ...

Oct 04, 2015  The use of recycled aggregates in structural concrete production has the inconvenience of increasing the fluid transport properties, such as porosity, sorptivity, and permeability, which reduces the resistance against penetration of environmental loads such as carbon dioxide and chloride ion. In this paper, behavior of ten concrete mixtures with different percentages of coarse aggregate ...

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SciELO - Brasil - Avaliação da durabilidade de concretos ...

Evaluation of the durability of concretes produced with recycled concrete aggregates using the two stage mixing approach Carla Mabel Medeiros de Albuquerque e Silva Programa de Pós-Graduação em Estruturas e Construção Civil - Universidade de Brasília, Campus Universitário Darcy Ribeiro, CEP 70910-900, Brasília, DF, Brasil.

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EVALUATION OF 1977 ASPHALT CONCRETE SPRINKLE

The sprinkle aggregates were precoated at about 2500F with the same asphalt cement that was used in the surface course mix. Both drum mixers and batch plants were used for the precoating. The amount of asphalt that provided the desired precoating was approximately 1% of the dry weight for conventional aggregate and 2% for lightweight aggregate.

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The Effects of Aggregate Gradation on the Optimum Asphalt ...

國立臺灣科技大學 - Evaluation of pre-coated recycled concrete aggregate for hot mix asphalt / Lee, C.-H.;Du, J.-C.;Shen, D.-H. 國立臺灣科技大學 - Evaluation of pre-coated recycled concrete aggregate for hot mix asphalt / Lee, Cheng-Hsiao;Du, Jia-Chong;Shen, Der-Hsien

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TítuloOverview of bituminous mixtures made with recycled ...

TítuloOverview of bituminous mixtures made with recycled concrete aggregates . 26 0 0 0 0

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PART 1—STANDARD SPECIFICATIONS AND STANDARD

M 29-12 (2016) Fine Aggregate for Bituminous Paving Mixtures M 43-05 (2013) Sizes of Aggregate for Road and Bridge Construction M 45-16 Aggregate for Masonry Mortar M 80-13 (2017) Coarse Aggregate for Hydraulic Cement Concrete M 195-11 (2019) Lightweight Aggregates for Structural Concrete

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