recycled concrete aggregate scientific net

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Recycled Aggregate Concrete Scientific.Net

Abstract: This study also investigates the effectiveness of multiple surface modification of recycled concrete aggregate (RCA) with respect to mechanical properties of the resultant recycled aggregate concrete (RAC) when exposed to various curing conditions, namely, normal water (N w) and seawater (S w).The properties included compressive and flexural strength and impact resistance.

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Recycled Concrete Aggregate (RCA) Scientific.Net

The objective is to find the equivalent stress block parameters namely, the effective average concrete ratio and the stress block depth factor for Self Compacting Concrete with recycled aggregate (RSCC) and SCC with recycled aggregate incorporating steel fibres (SFRSCC) . SCC is defined as a highly workable concrete which flows by its own weight.

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Recycled Aggregate Concrete (RAC) Scientific.Net

Results showed that recycle aggregate concrete has relatively high compressive strength, tensile strength and modulus of elasticity. RACC size of 1.0 m x 1.0 m x 1.0 m with 150 mm thickness is found to be suitable and safe to be used both as container and retaining wall. ... Scientific.Net is a registered brand of Trans Tech Publications Ltd ...

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Recycle Concrete Aggregate Scientific.Net

Advances in Science and Technology International Journal of Engineering Research in Africa Advanced Engineering Forum Journal of Biomimetics, Biomaterials and Biomedical Engineering Materials Science. Defect and Diffusion Forum Solid State Phenomena ...

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Recycled Coarse Aggregate Scientific.Net

Abstract: Considering the high absorption of water is a distinctive feature of recycled crushed bricks coarse aggregate, the mixture ratio text of recycled concrete using crushed bricks as coarse aggregate is carried out, and the compressive performance is studied.The resert indicate , the strength grade of recycled concrete which using bricks as coarse aggregate can reach C20 and C25 ...

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Influence of Calcined Clay on the ... - scientific

Utilization of concrete wastes as aggregate in conventional concrete is regarded as a promising way of achieving sustainability within the built-up environment. This study investigated the performance of high strength concrete produced using recycled aggregate (RCA) with the addition of calcined clay in the concrete mixes. The recycled aggregate was sourced from concrete rubbles and treated by ...

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(PDF) Recycled concrete aggregates - ResearchGate

发布日期: 2月 01, 2005

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Investigations on Concrete with Recycled Concrete as ...

2016-11-28  For recycled concrete aggregate, the result shown that the addition of recycled aggregate resulted in a significant reduction in concrete compressive strength with the control specimen. This reduction increased with increasing percentage of recycled aggregate. Reduction in M25 grade cube compressive strength of 2% (R20), 8%

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A 3-dimensional prediction model for mechanical strength ...

Recycled aggregate concrete (RAC) is made by partially or completely replacing natural aggregate (NA) with RA. The application of RAC in the construction industry effectively solves land occupation and environmental pollution caused by construction waste landfill, and reduces the overexploitation of natural resources, and realizes the ...

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(PDF) Use of recycled concrete aggregate in high-strength ...

The results of a test programme to study the use of recycled concrete aggregate (RCA) in high-strength, 50 N/mm2 or greater, concrete are described. The effects of coarse

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Recycled Concrete Aggregate - an overview ScienceDirect ...

Recycled concrete aggregate (RCA) is the designation used in BS 8500-2 for recycled aggregate principally comprising crushed concrete. Designations of recycled aggregate other than RCA are of lower quality and may contain significant quantities of masonry which would preclude or limit their use in structural concrete.

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A Comprehensive Review on Recycled Aggregate and Recycled ...

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 of recycled aggregate concrete – A review ...

2018-5-1  1. Introduction. Recycled aggregate (RA) derived from construction and demolition waste is suitable for partial or entire replacement for virgin aggregate when making new concrete. Using waste concrete as RA could save about 60% of limestone resources and reduce CO2 emissions by

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Durability evaluation of recycled aggregate concrete in a ...

2020-11-10  For RAC, it is predictable that the durability in a complex environment is inferior to the traditional concrete ( Wang et al., 2018 ). Because the attached mortar on the surface of recycled coarse aggregate (RCA) results in its deteriorating quality compared with the natural coarse aggregate (NCA), thus affecting the performance of RAC ( Zhu et ...

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Recycled concrete as an aggregate for concrete—a review ...

The present state of knowledge on the use of recycled concrete as an aggregate in new concrete is reviewed and suggestions made as to what further work is necessary before a proper assessment of the material can be made. Where crushed uncontaminated concrete is used the properties of the material as an aggregate and the basic engineering characteristics of the concrete made with it are well ...

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Potential use of recycled aggregate as a self-healing ...

2020-1-1  The concrete mixing procedure is carried out in accordance with the GB/T 50081-2002 standard .The fresh mixture was then cast into a cubic mold of 70.7×70.7×70.7 mm and a mold of 40.0×40.0×160.0 mm ().A total of 12 concrete specimens were poured into two groups: group I was a test piece group with Bacillus bacillus attached to the recycled aggregate as a carrier; group II was a

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Experimental Study on Recycled Concrete Aggregates

2021-4-15  the demolished concrete aggregate DCA is replaced by various percentage of 10%, 20%, 30%, 50%, 100% and test can be conducted and compared with nominal concrete. Key Words: Demolished, concrete waste, recycle, new concrete, fresh coarse aggregate 1. INTRODUCTION Increased concern for environmental protection and for

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Investigations on Concrete with Recycled Concrete as ...

2016-11-28  For recycled concrete aggregate, the result shown that the addition of recycled aggregate resulted in a significant reduction in concrete compressive strength with the control specimen. This reduction increased with increasing percentage of recycled aggregate. Reduction in M25 grade cube compressive strength of 2% (R20), 8%

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Using waste concrete as aggregate (Journal Article) OSTI.GOV

1995-10-1  When restrictions severely limit local access to concrete aggregate, broken pieces of waste concrete (WCA) are used as aggregate. Today environmental studies discussing the recycling and reuse of waste materials are gaining great importance. Using waste material which was obtained from razed ...

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Mechanical properties, drying shrinkage, and nano-scale ...

2 天前  Mechanical behaviour of structural concrete with ground recycled concrete cement and mixed recycled aggregate J. Clean. Prod. , 275 ( 2020 ) , Article 122913 , 10.1016/j.jclepro.2020.122913

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Recycled Concrete as Aggregate for Structural Concrete ...

2011-2-16  A comparative analysis of the experimental results of the properties of fresh and hardened concrete with different replacement ratios of natural with recycled coarse aggregate is presented in the paper. Recycled aggregate was made by crushing the waste concrete of laboratory test cubes and precast concrete columns. Three types of concrete mixtures were tested: concrete

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Sustainability Special Issue : Recycled Construction ...

Overview of existing studies for 1) providing an overview of existing research and practices of recycled aggregate concrete; 2) introducing the latest studies of high-performance concrete adopting recycled aggregates from CD wastes; or 3) evaluating the latest findings of recycled aggregate concrete by achieving waste reuse whist realizing ...

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Using waste concrete as aggregate (Journal Article) OSTI.GOV

1995-10-1  When restrictions severely limit local access to concrete aggregate, broken pieces of waste concrete (WCA) are used as aggregate. Today environmental studies discussing the recycling and reuse of waste materials are gaining great importance. Using waste material which was obtained from razed ...

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Net incremental indirect external benefit of manufacturing ...

2018-8-1  View 0 peer reviews of Net incremental indirect external benefit of manufacturing recycled aggregate concrete on Publons Download Web of Science™ My Research Assistant : Bring the power of the Web of Science to your mobile device, wherever inspiration strikes.

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Mechanical Properties and Durability of Recycled Aggregate ...

2021-6-30  The recycled aggregate permeable concrete made of reused construction wastes is very important for realizing the sustainable development of the construction industry, it can alleviate the adverse impact of surface runoff during storm and the urban heat island effect.

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Axial compressive behavior of seawater sea-sand recycled ...

Recycling such waste to make recycled aggregate concrete (RAC) is also beneficial for sustainable city development . Therefore, mixing seawater sea sand (SS) and RAs to make seawater sea sand recycled aggregate concrete (SSRAC) is a promising way to solve two fundamental problems: the raw material shortage and recycling of construction waste.

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Use of Recycled Aggregate as Alkali Activator to Enhance ...

The test results indicated that recycled aggregates could be used as an alkali activator for BFS, and they were also able to help achieve about 90% of compressive strength of the concrete with natural aggregate depending on its optimum proportion with BFS.

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Treatment Methods for the Quality Improvement of Recycled ...

for the purpose of providing references for further research and practical application about the quality improvement of RCA, in this paper, various treatment methods were firstly classified into four categories: removing old mortar (OM), strengthening OM, multi-stage mixing methods, and combination methods. Thereafter, the improvement mechanisms and important conclusions of various treatment ...

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Evaluation of municipal solid waste ... - researchgate

Test results indicated that recycled concrete aggregate can be used as a coarse aggregate in high calcium fly ash geopolymer concretes with the 7-day compressive strengths of 30.6-38.4 MPa which ...

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Management of Construction and Demolished Waste as an ...

Etxeberria M, Vázquez E, Marí A, Barra M. Influence of amount of recycled coarse aggregates and production process on properties of recycled aggregate concrete,Cement and Concrete Research. 2007;37(5):735-742. Padmini AK, Ramamurthy K, Mathews MS. Influence of parent concrete on the properties of recycled aggregate concrete. 2009;23(2):829–36.

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