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Recycled Concrete Aggregate an overview
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. This is largely due to the potential for higher proportions of the masonry
Properties of Self-Compacting Concrete with Recycled
The utilisation of recycled concrete aggregate (RCA) in Self-Compacting Concrete (SCC) has the potential to reduce both the environmental impact and financial cost associated with this increasingly popular concrete type. However, to date limited research exists exploring the use of coarse RCA in SCC. The work presented in this stone seeks to build on the existing knowledge in this area by
(PDF) Recycled Aggregate based Self Compacting
In this work, the effect of using Recycled Concrete Aggregates (RCA) in self compacting concrete (SCC) was investigated for structural applications, ensuring strength and durability. To accomplish
The use of recycled concrete aggregate in structural concrete
The term recycled concrete aggregates is abbreviated to RCA in BS 8500-2 (2002) and is defined as Type II recycled aggregate in BRE Digest 433 (1998). Types I and III recycled aggregate are of lower quality and contain significant quantities of impurities which would preclude their use in structural concrete. The objectives of the project were: (i) to update clauses 1702 and 1703, Volume 1 of
Recycled stone as an Aggregate Replacement in Self
14.09.2018· Keywords: self-compacting concrete, rubberized concrete, recycled rubber, aggregate replacement. 1. Introduction . The number of unusable waste tires from different kinds of vehicles is rapidly growing and is in fact turning out as one of the major ecological and environmental problems of the present day. Nearly one-billion waste tires are discarded each year,and are predicted to be
recycled concrete Topic
01.10.2020· The reason for recycling is the reduction of waste in order to protect nature against pollution, the increasing shortage of suitable dumping grounds, and to save energy and natural resources. Concrete debris is typically reclaimed as recycled aggregate (RCA). By recycling concrete, valuable landfill space and natural resources are preserved.
Self-compacting concrete with recycled concrete
30.12.2017· A concrete mix, named R25, was obtained substituting 25 vol% of natural aggregates (coarse and fine) with recycled aggregates.R25 contains 45 vol% of N0-6, 30 vol% of N6-16, 12 vol% of R0-4, 5 vol% of R4-8 and 8 vol% of R8-16.. Two different mixes were obtained substituting 40 vol% of natural aggregates. In the mix named R40 both coarse and fine natural aggregates were partially
Recycled Aggregate Concrete SlideShare
Recycled Aggregate Concrete 1. A STUDY ON “RECYCLED AGGREGATE CONCRETE” BY- NEELANJAN SARKAR MURSHIDABAD COLLEGE OF ENGG. & TECH. BRANCH -- Civil engineering Year -- 3rd year (6th sem) 2. I would like to express my gratitude to all those who gave me the possibility to complete this project. I am deeply indebted to my my HOD (CIVIL) and the faculty members of my
Recycled Concrete as Aggregate for Structural Concrete
Recycled concrete aggregate was produced by crushing of ―old‖ concrete cubes used for compressive strength testing and one precast reinforced concrete column, which had inappropriate dimensions (Figure 1). The strength class of old concrete cubes was C30/37 and the corresponding value of compressive strength for precast column was C40/50, nomenclature according to Eurocode 2
Recycled stone as an Aggregate Replacement in Self
14.09.2018· Keywords: self-compacting concrete, rubberized concrete, recycled rubber, aggregate replacement. 1. Introduction . The number of unusable waste tires from different kinds of vehicles is rapidly growing and is in fact turning out as one of the major ecological and environmental problems of the present day. Nearly one-billion waste tires are discarded each year,and are predicted to be
Some Properties of Self Consolidating Concrete Produced by
corresponding to the use of normal recycled aggregates in the mix of SCC is fixed, the tests related to recycled aggregates self-consolidating concrete cover different mixes according to the amount of recycled aggregates per ratio to the normal aggregates content. The principal aim of this research is to improve the materials sustainability since the use of recycled aggregates will reduce the
Permeability properties of self-compacting concrete with
poorer durability properties of recycled aggregates concrete can be adequately compensated by the use of fly ash, either as a replace-ment of cement or addition, in the concrete mix design [7]. When compared with normal vibrated concrete, the SCC mix-tures usually exhibit a better durability potential, even when the mixtures have larger water contents. This is due to increased fines content
The use of recycled concrete aggregate in structural concrete
The term recycled concrete aggregates is abbreviated to RCA in BS 8500-2 (2002) and is defined as Type II recycled aggregate in BRE Digest 433 (1998). Types I and III recycled aggregate are of lower quality and contain significant quantities of impurities which would preclude their use in structural concrete. The objectives of the project were: (i) to update clauses 1702 and 1703, Volume 1 of
Self-Compacting Concrete with Recycled Concrete Aggregate
Aggregate substitution in several materials, including concrete, by different types of waste, such as Recycled Concrete Aggregate (RCA), is an area of study that has opened several research lines (RCA) (Safiuddin et al.,2013).
Enhancing the Durability of Self-Compacted Concrete Cast
concrete "SCC" cast using recycled aggregates recycled-aggregate selfas -compacted concrete "RA-SCC". The durability of -SCC RA studied in terms of sulfates and chlorides attackfor different periods. Also, the effects of using several available enhancing materials to improve the durability of RA- SCC were studied. 2. RESEARCH SIGNIFICANCE . As the increase in using recycled aggregates with
CHARACTERIZATION OF RECYCLED SELF-COMPACTING CONCRETE
Recycling concrete waste as the recycled aggregate is one of the methods to reduce the concrete waste [1]. In recent years, using self-compacting concrete (SCC) becomes increasing. The frequency of using SCC is the highest type of concrete in many countries such as Sweden and Japan, where SCC was originally developed. In the last two decades, a significant amount of papers has been done to
Recycled Aggregate Self Compacting Concrete
Recycled Aggregate Self Compacting Concrete Prashant O. Modani 1, Vinod M Mohitkar 2 1- Assistant Professor, B.N. College of Engineering, Pusad 445204 2- Secretery, Maharashtra State Board of Technical Education, Mumbai -51 Abstract An experimental inves tigation was conducted on self compacting concrete with different percentages of coarse recycled concrete aggregate. The main
Freeze–thaw resistance, mechanical and transport
01.01.2014· The effects of coarse recycled concrete aggregate on freeze–thaw resistance, mechanical performance and transport properties of self-consolidating concrete (SCC) were investigated. Recycled concrete aggregate (RCA) was substituted for crushed coarse limestone aggregate as 0, 20, 40 and 60 wt% of limestone aggregate. Mixtures having three different water/binder (w/b) ratios (0.43, 0.48 and
Top 20 largest recycled aggregates producers list
Concrete and asphalt are recycled throughout the United States, but the South can stake a strong claim as the preeminent region for producing aggregate. Each of the top five companies on Construction & Demolition Recycling magazine’s updated list of the 20 largest recycled aggregates producers in the United States operates partly or exclusively in the South.
Self-Compacting Concrete with Recycled Concrete Aggregate
Aggregate substitution in several materials, including concrete, by different types of waste, such as Recycled Concrete Aggregate (RCA), is an area of study that has opened several research lines (RCA) (Safiuddin et al.,2013).
Incorporating recycled aggregates in self-compacting
(2020). Incorporating recycled aggregates in self-compacting concrete: a review. Journal of Sustainable Cement-Based Materials: Vol. 9, No. 3, pp. 165-189.
Recycled Aggregate Self Compacting Concrete
Recycled Aggregate Self Compacting Concrete Prashant O. Modani 1, Vinod M Mohitkar 2 1- Assistant Professor, B.N. College of Engineering, Pusad 445204 2- Secretery, Maharashtra State Board of Technical Education, Mumbai -51 Abstract An experimental inves tigation was conducted on self compacting concrete with different percentages of coarse recycled concrete aggregate. The main
Evaluation of Stress Block Parameters for SCC with
depth factor for Self Compacting Concrete(SCC)with recycled aggregate (RSCC). An experimental investigation is carried out on the stress strain characteristics of SCC by partially replacing 25, 50, 75 and 100 % of coarse aggregate by recycled concrete aggregate for varying design strength 30, 40, 50 MPa under monotonically increasing axial loading. A total of 45 cylinders are prepared to
Self Compacting Concrete (SCC) with Recycled Coarse
APA Style: Shrividya M.Nair, Dr. Geetha K.Jayaraj,Self Compacting Concrete (SCC) with Recycled Coarse Aggregate-A Review International Journal of Engineering Trends and Technology, 67(10),227-231. Abstract Self Compacting Concrete is the type of concrete which does not require vibration at the time of placing and compaction, also it is having the capacity to flow in congested reinforcement
Self-compacting concrete with recycled aggregate: A
coarse recycled aggregate (RCA) are used in the production of self compacting concrete (SCC) in varying percentage replacements of natural coarse aggregate (NCA) from 0% to 100% with increment of 20%. This investigation is an attempt to examine the influence of recycled aggregate on strength, permeability, resistance to acid attack, chloride penetration, and alkalinity of self compacting
Properties of SCC containing pozzolans, Wollastonite micro
SCC without recycled aggregates. Hence use of nearly equal amounts of WMF, flyash, and microsilica such that nearly 30% of cement is substituted, is recommended. 1. Introduction The substitution of cement in concrete has been a subject of research since the last quarter of the twentieth century. It was established that pozzolanic materials could substitute cement by nearly 20–30% without
Fresh properties of self-compacting concrete containing
ers can be re-used as concrete aggregate, glass ceramics, pozzolanic material, artificial stone, and colored glass (Chiou and Chen 2013). The use of recycled waste glass in Portland cement and concrete has attracted much in- terest worldwide due to increased disposal costs and environmental concerns (Wang and Huang 2010). Although work on the use of finely ground glass as a pozzolanic material
Use Of Recycled Aggregate And Expanded Clay For Self
In particular, as aggregates, different combinations of fine and coarse expanded clay were tried, also partially replaced by either quartz sand or recycled aggregate coming from a recycling plant, in which rubble from concrete demolition are suitably treated. The SCLWACs were characterized at the fresh state by means of slump flow, V-funnel and L-box tests, and after hardening by means of
Research Article Properties of Self-Compacting Concrete
Recycled aggregate . C [ ], respectively. e recycled aggregate used was a crushed and unwashed recycled concrete aggregate, with a nominal size of mm sourced from a construction and demolition waste recycling facility. e coarse natural aggregate consisted of crushed granite with a nominal size of mm. Table presents the water absorption ( hours)
CHARACTERIZATION OF RECYCLED SELF-COMPACTING
Recycling concrete waste as the recycled aggregate is one of the methods to reduce the concrete waste [1]. In recent years, using self-compacting concrete (SCC) becomes increasing. The frequency of using SCC is the highest type of concrete in many countries such as Sweden and Japan, where SCC was originally developed. In the last two decades, a significant amount of papers has been done to
Self-compacting concrete with recycled aggregate: A
coarse recycled aggregate (RCA) are used in the production of self compacting concrete (SCC) in varying percentage replacements of natural coarse aggregate (NCA) from 0% to 100% with increment of 20%. This investigation is an attempt to examine the influence of recycled aggregate on strength, permeability, resistance to acid attack, chloride penetration, and alkalinity of self compacting
Incorporating recycled aggregates in self-compacting
(2020). Incorporating recycled aggregates in self-compacting concrete: a review. Journal of Sustainable Cement-Based Materials: Vol. 9, No. 3, pp. 165-189.
Self Compacting Concrete (SCC) with Recycled Coarse
APA Style: Shrividya M.Nair, Dr. Geetha K.Jayaraj,Self Compacting Concrete (SCC) with Recycled Coarse Aggregate-A Review International Journal of Engineering Trends and Technology, 67(10),227-231. Abstract Self Compacting Concrete is the type of concrete which does not require vibration at the time of placing and compaction, also it is having the capacity to flow in congested reinforcement
Effects of Recycled Concrete Aggregates on the
Tests were performed on SCC using natural rock aggregate (NR-SCC) and recycled-concrete aggregate (RC-SCC). Fresh concrete tests included slump-flow, slump-flow with a J-ring, and L-box tests. All mixes tested were found to be highly flowable and stable. Strength tests included compression loading of cylinders and pushoff specimens. The RC-SCC was found to have superior compressive
Properties of SCC containing pozzolans, Wollastonite micro
SCC without recycled aggregates. Hence use of nearly equal amounts of WMF, flyash, and microsilica such that nearly 30% of cement is substituted, is recommended. 1. Introduction The substitution of cement in concrete has been a subject of research since the last quarter of the twentieth century. It was established that pozzolanic materials could substitute cement by nearly 20–30% without
Research Article Properties of Self-Compacting Concrete
Recycled aggregate . C [ ], respectively. e recycled aggregate used was a crushed and unwashed recycled concrete aggregate, with a nominal size of mm sourced from a construction and demolition waste recycling facility. e coarse natural aggregate consisted of crushed granite with a nominal size of mm. Table presents the water absorption ( hours)
Strength and Durability Evaluation of Recycled
14.05.2015· This stone discusses the suitability of producing concrete with 100 % recycled aggregate to meet durability and strength requirements for different applications. Aggregate strength, gradation, absorption, specific gravity, shape and texture are some of the physical and mechanical characteristics that contribute to the strength and durability of concrete.
Fresh properties of self-compacting concrete containing
ers can be re-used as concrete aggregate, glass ceramics, pozzolanic material, artificial stone, and colored glass (Chiou and Chen 2013). The use of recycled waste glass in Portland cement and concrete has attracted much in- terest worldwide due to increased disposal costs and environmental concerns (Wang and Huang 2010). Although work on the use of finely ground glass as a pozzolanic material
EXPERIMENTAL STUDY ON SELF COMPACTING CONCRETE
Self-compacting concrete (SCC) is a flowing concrete mixture that is able to consolidate under its own weight. The highly fluid nature of SCC makes it suitable for placing in difficult conditions and in section with congested reinforcement. Use of SCC can also help minimize hearing-related damages on the worksite that are induced by vibration of concrete. Another advantage of SCC is that the