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Crushing treatment on recycled aggregates to improve their mechanical behaviour for use in unbound road layers ... disintegrator, and vortex machine was performed according to the quality ...
Jun 06, 2021 After 28 days, tests are carried out on the specimens. The results show that the mechanical treatment followed by the SF combination significantly enhances the performance of recycled aggregate concretes RACs. Satisfactory test results are generally obtained for treated recycled aggregate concrete tRAC produced with up to 60 tRA and 10 SF.
DOI 10.1016j.jmrt.2020.12.095 Corpus ID 234223197. A novel treatment method for recycled aggregate and the mechanical properties of recycled aggregate concrete articleWang2021ANT, titleA novel treatment method for recycled aggregate and the mechanical properties of recycled aggregate concrete, authorXianfeng Wang and Xiaosheng Yang and Jun Ren and N. Han and F.
Jan 24, 2019 3.5. The Mechanical Treatment of Recycled Concrete Aggregate. The last stage of the recycled aggregate quality improvement was mechanical processing. The Los Angeles drum was used for that purpose. The machining time was set at 5 min, 10 min, and 15 min, respectively.
May 05, 2015 The physical and mechanical properties of these aggregates, and their strength and performance of recycled aggregate concrete are determined. The results show that treatment with H 2 SO 4, and heating and scrubbing yield, aggregate with reduced water absorption and other desired properties of natural aggregate. The concrete made out of these ...
This paper presents an experimental research on mechanical properties of recycled aggregate concrete RAC at low and high waterbinder WB ratios. Concrete at two WB ratios 0.255 and 0.586 was broken into recycled concrete aggregates RCA. A type of thermal treatment was employed to remove mortar attached to RCA. The RAC at a certain low or high WB ratio was prepared with RCA
Jun 18, 2018 The effect of carbonation treatment and mixing method on the mechanical properties and interfacial transition zone ITZ properties of recycled aggregate concrete RAC was investigated. Properties of recycled concrete aggregate RCA were tested firstly. Then, five types of concretes were made and slump of fresh concrete was measured immediately after mixing. Compressive strength and ...
aggregates in the impact resistance, through a better understanding the behavior of recycled plastic in concrete structures, experimenting fresh and hardened concrete mixtures containing recycled plastic. 1.2 Problem Statement Gaza Strip is a small closed coastal area 365 Km2 and a densely populated
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
Jan 24, 2019 PDF Concrete is a building material commonly used for ages. Therefore, in the result of repairs or demolition of building structures, large amounts of... Find, read and cite all the research ...
Abrasion treatment to Recycled aggregate gives better result in all among treatments. ... In this treatment method coarse recycled aggregate were placed inside Los Angeles abrasion machine. It consists of a hollow steel cylinder, closed at both the ends with an internal diameter of 700 mm and length 500 mm and capable of rotating about its ...
Apr 05, 2021 The utilization of recycled aggregates made from construction wastes and recycled rubber made from waste tires is an effective method to realize the sustainable development. Thus, this study aims to determine the feasibility of using recycled aggregate concrete containing rubber, named rubberized recycled aggregate concrete RRAC as a new type of green-building material.
Apr 15, 2020 Studies have shown that the incorporation of waste tire rubber aggregates reduces the strength, increases permeability and decrease thermal conductivity of concrete. However, only a few studies have investigated the effect of surface-modified rubber aggregates on the properties of concrete. This study investigates the effect of the surface treatment of waste tire rubber as coarse aggregates ...
Jun 27, 2021 This study examines the mechanical and durability properties of five different concrete mixes using the construction and demolition waste as partial replacement of coarse aggregate. In the concrete mixes, a constant watercement wc ratio of 0.43 was used. In contrast, the natural coarse aggregates were replaced by recycled coarse aggregate using five different replacement
treating recycled aggregate by mechanical machine recycled aggregate crushing process - CGM Mine Machine , Crushing is the breaking or grinding by mechanical means of rock, stone or recycled ...
By treating the recycled aggregate with all treatment processes the physical, mechanical, and durability properties are improved when compared to untreated recycled coarse aggregate concrete.
recycled aggregate, recycled aggregate treated with HCl and H2SO4, recycled aggregate obtained after scrubbing treatment, and heating and scrubbing treatment. The physical and mechanical properties of these aggregates, and their strength and performance of recycled aggregate
grinding treatment in Los Angeles machine, without grinding balls. This combined treatment simulates the conditions specific for a rotary kiln. This study was performed in order to compare some properties of recycled aggregate concrete before and after thermo-mechanical treatment to those of the natural siliceous aggregate. Moreover,
A STUDY ON RECYCLED CONCRETE AGGREGATES PAVAN P S 1, BABITHA RANI H ,DEEPIKA GIRISH , RAGHAVENDRA K M 2, VINOD P N 1,DUSHYANTH.V.BABU.R ,SHAIK NUMAN1 1Assistant Professor, Department of Civil Engineering, SET, Jain University. 2Student , Department of Civil Engineering, SET, Jain University. Abstract The amount of construction waste has been dramatically
The application of recycled aggregate to use in construction activities have been practice by developed European countries and also of some Asian countries. This paper reports the results of an experimental study on the mechanical properties of recycled aggregate concrete RAC as compared to natural aggregate concrete NAC.
summing up the physical and mechanical properties of recycled plastic concrete, it could be found that the addition of recycled plastic was effective for the mod-ication of concrete materials. Under the control of the amount of recycled plas-tic, the strength of concrete with recycled plastic aggregates can meet the engineering requirements.
Oct 16, 2020 In this paper, the effect of using recycled coarse aggregate RCA on the behavior of concrete is experimentally studied. The RCA is prepared by crushing and sieving of waste of standard compression test cubes having a compressive strength ranging between 25 MPa and 30 MPa.
The fine aggregate used in the concrete, i.e. recycled and conventional is 100 percent natural. The recycled aggregate are collected from four sources all demolished structures. For both types of concrete i.e. M-20 and M-25, wc ratio, maximum size of aggregate and mix proportion are kept constant.
Whilst recycled aggregate RA can alleviate the environmental footprint of concrete production and the landfilling of colossal amounts of demolition waste, there need for robust predictive tools for its effects on mechanical and durability properties. In this thesis, state-of-the-art machine learning ML models were deployed to predict properties of recycled aggregate concrete RAC.
Jan 22, 2019 The resource treatment process is the core of the entire construction waste treatment plant. Through the resource treatment,the separation of various sundries in construction waste can be realized, and the recycled aggregates of different specifications are produced according to the raw material requirements of the subsequent building materials.
Sep 04, 2019 The mechanical properties of recycled aggregate concrete RAC may be affected by the service time of parent concrete used to produce the recycled coarse aggregate RCA, which has not been experimentally investigated. Current models primarily relate RAC elastic modulus to its compressive strength. These models cannot describe the difference in the mechanisms of the
Apr 24, 2021 Europe PMC is an archive of life sciences journal literature.
Elaborating recycled aggregate is carried out by crushing the material in a treatment plant which favours self-cementing. In this research part of the recycled material is crushed again in the laboratory in order to produce a better self-cementing process when the material is crushed and used in a
Mar 02, 2021 Treatment of recycled concrete aggregate by acid, thermal and mechanical means improve the physical properties of RCA significantly. Processing of RCA removes the adhered mortar in RCA. The residual adhered mortar present in aggregates treated by acid, mechanical and thermal treatment methods is 2, 5 and 11 respectively.
recycled aggregate were studied in M20, M30, M40 and M50 mixes. These mixes were prepared using normal coarse aggregate. The coarse aggregate is then replaced with recycled coarse aggregate, and obviously the strength goes down. Mineral admixture, metakaolin, is used as partial replacement of recycled aggregate.
is paper presents an experimental research on mechanical properties of recycled aggregate concrete RAC at low and high waterbinder WB ratios. Concrete at two WB ratios . and . was broken into recycled concrete aggregates RCA. A type of thermal treatment was employed to remove mortar attached to RCA. e RAC at a certain low or high W ...
Sep 30, 2019 To investigate the effect of classification of recycled coarse aggregate on the mechanical behaviors of recycled aggregate concrete RAC, a total of 150 RAC testing blocks were designed based on the Chinese standard GBT 25177-2010, taking recycled coarse aggregate and substitution ratio as factors in a series of tests, including cubic compression, prismatic compression,
Dec 05, 2020 Hemp and Recycled Aggregates Concrete HRAC is a sustainable concrete where coarse aggregates are partially replaced with industrial hemp fibers and recycled concrete aggregates RCA 1.In the bid to achieve sustainable materials in construction and also reduce the carbon footprint and environmental impacts of concrete, researchers have been coming up with various ways to
2 For recycled aggregate concrete at a low waterbinder ratio of 0.255 prepared in this research, flaws in gravel are the main factor responsible for the decrease in mechanical properties, while flaws in attached mortar are the main factor responsible for the decrease in mechanical properties of recycled aggregate concrete at a high water ...
compared with different concrete mixes of different percentages of recycled aggregates. Recycled coarse aggregate is added in different amounts such as 20, 40, 60, 80 and 100. Cube compressive strength, cylinder compressive strength and split tensile strength of concrete made with recycled concrete aggregates are evaluated. A total of 72 cubes