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experiment of technique of recycle of aggregate

experiment of technique of recycle of aggregate

Experimental Investigation of Recycle Concrete Aggregate

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

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Experimental Case Study of Recycled Aggregate Concrete ...

Aggregate Recycled Asphalt Aggregate (%) A RAP00 100 0 B RAP25 75 25 C RAP50 50 50 D RAP75 25 75 E RAP100 0 100 6. FINDINGS OF THE STUDY A series of tests are conducted in the laboratory for evaluation of various properties of material, relevant for the study. All test have been conducted as per the guidelines of ...

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Experimental study on strength behaviour of recycled ...

conducted an experiment on “Strength evaluation of recycled-aggregate concrete by in-situ tests”. The compressive strength of concrete was determined at various ages up to 90 days using 100mm cubes. Based on the results, they concluded that for a given water- cement ratio, the recycled-aggregate concrete showed a ...

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An experimental study on the effect of recycled aggregate ...

This paper presents a rapid state-of-the-art of numerous topics related to RAC: from the recycling techniques of old-concrete-aggregates, the mix proportioning, the mechanical properties, the ...

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Experimental investigation on properties of recycled ...

Jul 10, 2019  Analysis results demonstrated the effectiveness of reducing the 8.95% water absorption value of the untreated recycled aggregate to 0.84% after the optimization process of BMM. Then, seven concrete specimens including 0-20-40-60% recycled aggregate (RA) and improved recycled aggregate (RA-i) mixes produced in the framework of the experimental ...

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The Experimental Study of the Utilization of Recycling ...

Jun 25, 2020  The experiment included 10 series of new composites made from heated recycled concrete aggregate (HRCA) subjected to different variants of

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Pre-Saturation Technique of the Recycled Aggregates ...

However, recycled aggregates present a low quality compared to natural aggregates, the water absorption being their main drawback. When used untreated in concrete mix, the recycled aggregate absorb part of the water initially calculated for the cement hydration, which will adversely affect some characteristics of the recycled concrete.

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The Optimum Production Method for Quality Improvement of ...

Jul 29, 2016  The results of the abrasion experiment performed to determine the optimum conditions for the manufacture of recycled fine aggregates that satisfy the quality standards showed that an abrasion time of 8.57 min and coarse aggregate ratio of over 1.5 have been the optimum conditions for producing aggregates with the target oven-dry density of 2460 ...

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Research on Composite Strengthening Nano-Technique of ...

The work described in this document forces on composite strengthening technique of recycled aggregate. In this experiment, recycled aggregates are soaked in different types and different concentrations of nanomaterials to strengthen. This research estimates the strengthening effects by comparing the properties of recycled aggregate soaked in different materials, and proves that the

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Experimental assessment of microwave heating assisted ...

Jun 30, 2021  It could be found that microwave assisted concrete aggregate recycling technique provide a new method to recycle the aggregates with high efficiency and low energy consumption. Based on the experimental results, only 0.41 kW h power supply was needed to recover the aggregates from saturated concrete under microwave heating.

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MECHANICAL PROPERTIES OF RECYCLED AGGREGATE

istics of recycled aggregate concretes vary considerably de-pending upon the quality and replacement level of recycled aggregate used. In this experiment, recycled aggregate pro-duced by advanced recycling method was used. The replace- ment level of aggregate was set as the major variable, so that

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The Effect of Mixing Technique and Prolonged Mixing Time ...

Abstract: The experiment aims to test the triple mixing (3M) technique to produce the concrete with recycled concrete aggregate (RCA). Then, the impact prolonged mixing, representing the influence of delivery and discharge time in praxis, is analysed by the change in strength properties.

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Effective Recycling of Surface Modification Aggregate ...

complete recycling of the aggregates by recovering the high-quality aggregates, while using a small amount of energy. With the application of this technique, the trade-off relationship during the manufacture of recy-cled aggregates can be overcome, in that the energy consumption is reduced while the quality of the recycled aggregate is ensured.

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Triaxial compressive strength experiment study of recycled ...

Nov 30, 2017  To study the triaxial compressive properties of recycled aggregate concrete (RAC) after high temperature, 100 Ф100 mm × 200 mm cylindrical RAC specimens with different replacement rate (0%, 30%, 70%, 100%) were fabricated to the conventional triaxial experiment (with the lateral confining stress of 0 MPa, 5 MPa, 10 MPa, 15 MPa and 20 MPa) after exposure to different high temperatures

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Meso-numerical Experiment of Recycle Concrete Based on ...

Based on the surface trimming technique,a gradually Delaunay tetrahedron division scheme is proposed to mesh the concrete specimen which can be taken as an inhomogeneous multi-phase composite consisting of mortar matrix,aggregates and the bond between them in mesoscopic.By this scheme,the sphere or ellipsoid aggregate can be meshed easily and the amount of elements generated is far less

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Using Microwave Heating to Completely Recycle Concrete

production of highquality recycled aggregates such as high energy consumption and the generation of large - amounts of fine powder during crushing [7] [8]. On the other hand, using lowquality recycled aggregates- can lower the concrete performance, which impedes the spread of recycled aggregate use [9] [10]. Because the a g-

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Positive results for recycled aggregate use in concrete ...

Nov 25, 2015  However recycled aggregates have some different properties that need to be accounted for when producing recycled aggregates concrete. The objective of this experiment was to study the possibility of using recycled aggregates produced from high quality concrete rejects in concrete structures designed according to common engineering practice and ...

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Experiment study on drying shrinkage deformation of ...

Apr 24, 2011  Abstract: Drying shrinkage deformation is one of the most important reasons which causes cracking of concrete materials. Mix design of C30 natural aggregate concrete(NAC) is used as reference, the experiment of drying shrinkage considering the influence of recycled aggregate replacement ratio and mixing amount of fly ash, water reducer, and expansive agent was made.

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Recycled Aggregates - Portland Cement Association

Using recycled aggregates instead of extracted aggregates would qualify as post-consumer. Because concrete is an assembly, its recycled content should be calculated as a percentage of recycled material on a mass basis. Credit can also be obtained for Construction Waste Management. It is awarded based on diverting at least 50 percent by mass of ...

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Tests show promise for recycled aggregate use in concrete ...

Nov 24, 2015  However recycled aggregates have some different properties that need to be accounted for when producing recycled aggregates concrete. The objective of this experiment was to study the possibility of using recycled aggregates produced from high quality concrete rejects in concrete structures designed according to common engineering practice and ...

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Experimental Study on Physical Properties of High Quality ...

The quality of recycled aggregates plays an important role in the performance of RCA. So it is necessary to carry out the experiment of its main physical properties, in order to verify whether the RCA has the characteristic of high quality. A. Water Absorption Experiment For recycled coarse aggregate, water absorption is an

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Effective Recycling of Surface Modification Aggregate ...

complete recycling of the aggregates by recovering the high-quality aggregates, while using a small amount of energy. With the application of this technique, the trade-off relationship during the manufacture of recy-cled aggregates can be overcome, in that the energy consumption is reduced while the quality of the recycled aggregate is ensured.

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Recycling of Waste Polymeric Materials as a Partial ...

Abstract- The potential of recycled waste polymeric materials as a substitute for aggregates in concrete has been investigated in the study. Three types of waste polymer, namely expanded polystyrene (EPS) based packaging waste, high density polyethylene (HDPE) and vehicle tire were used in the experiment. Assessment was carried out

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Experiment on strength and permeability of recycled ...

Aug 01, 2017  Besides, through the experiment on test cubes under standard maintenance, the porosity, water permeability and strength performance of recycled aggregate pervious concrete (RPC) under a single factor were studied. The grain size of coarse aggregate was 4.75-9.5 mm and the natural coarse aggregate (NCA) came from gravels.

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Experiment and Analysis on Flexural Bearing Capacity of ...

Through a static loading test for 5 recycled-brick coarse aggregate concrete beams with same axial compression strength but different replacement ratio,the bending failure process of every concrete beam is analyzed,and the flexural bearing capacity of normal section and the influence of recycled-brick coarse aggregate replacement ratio to the flexural bearing capacity are studied.The result ...

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

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 recognized as a factor that hinders the expanded use of ...

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Comparative Investigation of the Effect of Recycled Fine ...

The study examined the effect of the recycled HCB on fresh and hardened C-25 concrete properties and the possible replacement percentage of river sand by those recycled fine aggregates. The research also examined the comparative properties of the two recycled fine aggregates.

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Separation processes to improve the quality of recycled ...

Jan 01, 2013  The techniques associated with the latter approach are usually categorized as RCA beneficiation techniques. This chapter begins by discussing how reducing the mortar content can improve the properties of RCA and recycled aggregate concrete (RAC), the latter being concrete cast using RCA as part of its constituents.

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(PDF) A REVIEW ON THE USE OF POLYETHYLENE TEREPHTHALATE ...

The analyzed effect of PET fibers used in the experiment were recycled and waste plastic, several standard collected from the plastic bottles which were tests like bulk density, air content, considered as the waste products of the workability, and compressive strength, society. ... As such further investigation on containing PET aggregates are ...

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Mechanical Properties Of Recycled Aggregates Concrete ...

The recycled coarse aggregate will invariably have lower specific gravity and higher absorption than the original aggregate, due to the presence of cement paste in the recycled aggregate. The compressive strengths of recycled aggregate concrete are lower than those of the same mix designs made with virgin aggregate.

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Some mechanical properties of normal and recycled ...

compared reinforced concrete with natural aggregates and recycled aggregates. His results showed that com-pressive strength of concrete with natural aggregates was 35% higher than compressive strength of concrete with recycled aggregates. Dosho [3] in Japan replaced 30% and 50% of recycled coarse aggregates from a building with 30 years of age.

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

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 Research Papers. By Suvash C Paul.

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J. D. J.

A wide variety of recycling approaches has emerged since 1915. Categorization of recycling approaches is usually based on (a) the recycling procedure used, (b) the type of paving materials to be recycled and the end products they are to produce, or (c) the structural benefit to be gained from the recycling approach.

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MIT students fortify concrete by adding recycled plastic ...

Oct 25, 2017  Going forward, the team is planning to experiment with different types of plastics, along with various doses of gamma radiation, to determine their effects on concrete. For now, they have found that substituting about 1.5 percent of concrete with irradiated plastic

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