out on evaluating recycled concrete aggregate (RCA) of high quality produced through a protocol that preserves the original properties of the concrete to be recycled. Results showed that concrete with RCA of preserved quality performed significantly better in compressive strength, drying shrinkage, and salt scaling resistance.
mechanical properties of recycled coarse aggregate; the second part is the experimental study on the physical properties and working performance of recycled concrete and ordinary concrete. The work steps of this article include: (1) The sources of construction waste and waste concrete are investigated and analyzed.
Research Article Properties of Self-Compacting Concrete with Recycled Coarse Aggregate W.C.Tang, 1 P.C.Ryan, 2 H.Z.Cui, 3 andW.Liao 4 School of Architecture and Built Environment,e University of Newcastle, Callaghan, NSW , Australia
properties of the concrete. The steel fibres used in the concrete remain ineffective. Mathew P. et al.(16) The aim of research was to investigate the optimum percentage replacement of natural coarse aggregate (NCA
4.4 Properties of ﬁne and recycled coarse aggregate Locally available sand (ﬁne aggregate) conforming to IS: 383-1970  is collected from a nearby river and used in the present study. For recycled coarse aggregate, the parent concrete is crushed through a mini jaw crusher maintaining the size of aggregate between 20 and 4.75 mm.
recycled coarse aggregates, strength properties of concrete are decreased to some extent. The basic aim of this research was to investigate the effect of using recycled concrete pieces as coarse aggregate on flexural and tensile strength of concrete. The investigation was carried out by carrying
2013/11/05 · Demolition of old buildings has produced a large amount of waste material. In this paper, experiments were performed to design the mix proportion of concrete made with recycled coarse aggregate fro...
- the third concrete mix had 100% of recycled coarse aggregate (R100). As all the other variables were kept constant, this research enabled us to determine the influence of the coarse recycled aggregate amount (0%, 50% and 100%) on tested concrete properties. The following properties of concrete were selected for testing:
rate is high. The longitudinal strain of the recycled concretes goes up with the percentage of recycled coarse aggregate used . However, there are two main methods to enhance the properties of recycled concrete aggregates in order to improve concrete properties; 1) removing the adhered mortar, and 2) strengthening the adhered mortar.
recycled aggregate concrete pdf Similarly the properties of recycled aggregate concrete were also.Concrete. Constituents: coarse aggregate, fine aggregate, cement limestone and clay, and water. properties of recycled aggregate concrete-pdf Recycled Aggregate of Total Aggregate Use.
structural concrete to get mechanical properties of concrete produced with treated coarse RA and fine recycled aggregate which are comparable to concrete with natural coarse and fine aggregates. Initially, physical and mechanical properties of natural materials and RA are studied and compared. A mix proportion for M20 grade was then calculated ...
concrete, which will give better understanding on the properties of concrete with recycled coarse aggregate, Metakaolin and Nano-silica. 3 . OBJECTIVE The scope of this project: 1. Review and research of concrete properties using RCA,Metakaolin and Nano-silica. 2. Casting of concrete specimens by using different
Mechanical and durability properties of recycled aggregate concrete (RAC) made with different replacement levels of recycled coarse aggregate (RCA). Submitted to Construction and Building Materials. Huda, S.B. and Alam, M.S. 2014. Mechanical behavior of three generations of 100% repeated recycled coarse aggregate concrete.
The employment opportunities of recycled concrete aggregates will inevitably remain cautious due to the absence of well-established performance criteria. This paper is to investigate the influence of different granular compositions (recycled coarse and fine aggregate) on the mechanical characteristics and durability of concrete.
Contaminants found in recycled concrete degrade its strength. Contaminants could include plaster, soil, wood, gypsum, asphalt, plastic, or rubber. (8) Etxeberria et al. (13) studied concrete made with recycled coarse aggregates obtained from crushed concrete.
Effect of recycled concrete aggregates on strength and stiffness gain of concrete and on bond strength of steel prestressing strand ... the properties of the natural coarse aggregates being replaced, and volumetric replacement of natural coarse aggregates with …
1. Introduction. Concrete is known as one of the most highly consumed construction materials. The primary ingredients of a concrete mixture are cement, aggregates (coarse and fine), water and admixtures (Mindess et al., 2003; National Ready Mixed Concrete Association (NRMCA), 2012).
The reuse potential of tire chips as coarse aggregates in pavement concrete was examined in this research by investigating the effects of low- and high-volume tire chips on fresh and hardened concrete properties. One concrete control mixture was designed, which well exceeds CDOT Class P concrete requirements. The coarse aggregate
Use of Recycled Coarse Aggregate (RCA) in concrete can be described in terms of environmental protection and economy. This paper deals with the mechanical properties of concrete compressive ...
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 paper seeks to build on the existing knowledge in this area by ...
recommendations for guidelines on using RCA in concrete. It has been shown by the authors and other researchers that it is possible to create strong and durable concrete mixtures using RCA as coarse aggregate in volume replacement levels of natural coarse aggregate up to 100%.
It has been observed that the recycled coarse aggregate is used as normal aggregate. The workability of the concrete is increased by using RCA. Maximum properties of Recycled coarse aggregate have shown good with a little variation. Recycled aggregate materials produce harsh mixes with lower workability than Natural aggregates.
Properties of High-Workability Concrete with Recycled Concrete Aggregate Using the same W/C ratio, S/A ratio and HRWR dosage of control concrete, four different concretes were designed with RCA 30
recycled coarse aggregates for the application in the high strength structural concrete (HSSC), which will offer an improved understanding on the properties of concrete with recycled aggregates, as an unconventional material to coarse aggregate i.e. natural aggregate in structural concrete. The main objective of this thesis is to determine and ...
The recycled aggregates having a maximum particle size of 12.5 mm were obtained by crushing concrete prisms using a jaw crusher (Fig. 1(a)).The concrete prisms were produced approximately 11 months earlier in the Concrete Laboratory in Isfahan University of Technology (IUT) using Type I Portland cement with a target 28-day compressive strength of 30 MPa.
in this area are divided in two types: one type is with natural fine aggregates and coarse recycled aggregates; another group is with fine and coarse aggregates partially or totally made with recycled concrete. The percentage of recycled aggregates has influence on the new concrete properties too. Absorption is an aspect that is investigated a ...
Properties of self-compacting concrete prepared with coarse recycled concrete aggregate Article in Construction and Building Materials 24(7):1129-1133 · July 2010 with 183 Reads How we measure ...
recycled fine aggregate and recycled coarse aggregate. It also compares these properties with natural aggregates. Basic changes in all aggregate properties were determined and their effects on concreting work were discussed at length. Similarly the properties of recycled aggregate concrete were also determined and explained here.
This paper investigates the influence of different amounts of recycled coarse aggregates obtained from a demolished RCC culvert 15 years old on the properties of recycled aggregate concrete (RAC). A new term called “coarse aggregate replacement ratio (CRR)” is introduced and is defined as the ratio of weight of recycled coarse aggregate to the total weight of coarse aggregate in a concrete ...
undertaken to utilize recycled coarse aggregate as a partial replacement for natural coarse aggregates for development M grade concrete. e recycled coarse aggregates have been utilized as such (unwashed) as well as in washed form for comparison purpose with control concrete using natural aggregates. Engineering properties and durability aspects of
PDF | On Sep 1, 2002, R. dos Santos and others published Mechanical Properties of Concrete with Coarse Recycled Concrete Aggregates | Find, read and cite all the research you need on ResearchGate
12/1/2016 · If the inline PDF is not rendering correctly, you can download the PDF file here. Export References .ris ProCite. RefWorks. Reference Manager.bib ... 14. R. Khaldoun. “Mechanical properties of concrete with recycled coarse aggregate”, Building and Environment, 42(1), 407-415, 2007. 15. K. Rahal. “Mechanical properties of concrete with ...
Key words: Recycled Coarse Aggregate, Concrete, Mechanical Properties, Degree of Partial Replacement. Cite this Article: Abbas Sadiq Mohammed, Ali Laftah Abbas, Mechanical Properties of Recycled Coarse Aggregate Concrete Made from Known Properties Demolition Waste. International Journal of Civil Engineering and Technology 10(9), 2019, pp. 33-45.
and fine aggregates, see Fig. 1. The Physical properties of The Recycled Aggregate Concrete (RAC) with MNS =19 mm was used as partial replacement of Natural Coarse Aggregate (NCA). The recycled aggregate
the properties of concrete containing recycled coarse aggregate and fly ash. The replacement of natural aggregate by recycled coarse aggregate was in the range of 25% to 100%. In addition to this ordinary Portland cement was partially replaced by fly ash. From the study it was found that fly ash improves the
concluded as, it can be seen that recycled concrete aggregate as natural coarse aggregate has no detrimental effect on the strength and performance of concrete when designed correctly.An experimental study was carried out to investigate the properties of concrete with recycle aggregates.