recycled aggregates having better surface texture. It is observed that 10% fly ash addition improves substantially the cube compressive strength (at all ages) of both natural aggregate concrete and recycled aggregate concrete.Flyash addition modifies the microstructure of the interfacial zone which leads to a better performance of the concrete.
measured coefficients are found to be distinctly lower for brick and recycled aggregate concretes than for stone aggregate concrete. This confirms the necessity of using a revised set of coefficients to estimate the effective confinement in columns of aggregates that exhibit a greater dilation property in concrete.
Taylor. “Performance of concrete made with commercially produced coarse recycled concrete aggregate”, Cement Concrete Research, 31(5), 707-712, 2001. 8. BCSJ. “Proposed standard for the use of recycled aggregate and recycled aggregate concrete”, Committee on Disposal and Reuse of Construction Waste, BCSJ, Tokyo, Japan, 1977. 9. BRE.
Berndt (2009) found that recycled aggregate concrete mixtures containing 50% slag gave the best overall performance of vibrated concrete. Kou . et al. (2007) reported that SCC with class F ﬂy ash improves the mechanical and durability properties of recycled aggregate concrete. Kou and al.
Keywords: Construction demolition waste, Recycled concrete aggregates, Concrete performance, Case studies. Angelos Koulouris is a lecturer in the School of Engineering and member of the Sustainable Technology Research Centre within the Faculty of Technology at Kingston University UK.
Hansen, T.C. (1986) Recycled Aggregates and Recycled Aggregate Concrete Second State-of-the-Art Report Developments 1945-1985. Materials and Structures, 19, 201-246.
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The environmental impact of recycled aggregate (wet) was up to 16~40% higher compared with recycled aggregate (dry); the amount of energy used by impact crushers while producing wet recycled aggregate was the main cause for this result.
quality original concrete can be used in high -valued applications, such as precast concrete. These high quality aggregates can be obtained by optimizing the crushing process. To ensure recycled aggregate concrete quality, the influence of different parameters on its mechanical and durability properties must be established.
recycled aggregate concrete (RAC) exposed to elevated temperature. Fly ash (as replacement of cement) was added while making concrete. Recycled aggregates are mixed with natural aggregates also to prepare concrete. Cubes and cylinder test specimens were prepared and cured under water for 28 days. Test specimens were exposed to different levels of
Recycled Coarse Aggregate in the concrete mix for an equivalent application or purpose. So in this study we have taken the demolished concrete aggregate 10%, 20%, and 30% by weight of the conventional coarse aggregate and the concrete cubes were casted by Recycled Aggregate Concrete. Then further tests
Abstract. This research was conducted with the use of recycled aggregate as modification. In terms of the use of recycled aggregate, the percentage of recycled aggregate should be determined because the strength of concrete would not be obtained by the high percentage of recycled aggregate.The scope of study is about comparison between recycle coarse aggregate and natural aggregate in terms of ...
 Thomas J., Thaickavil N. N., Wilson P., Strength and durability of concrete containing recycled concrete aggregates, Journal of Building Engineering 19/2018, 349–365.  Pellegrino C., Faleschini F., Sustainability improvements in the concrete industry: use of recycled materials for structural concrete production, Springer, 2018.
Although this study focuses on the compressive behavior of unconfined and FRP-confined recycled glass aggregate concrete (RGAC) without recycled additions, using recycled additions (e.g., fly ash) as binder material to partially replace cement is another attractive approach to further reduce the consumption of cement and to avoid the ...
show that the compressive and tensile strengths values of the recycled concrete aggregate increase as the recycled aggregate and the silica fume contents increase. The study also indicates that in order to accommodate 50% of recycled aggregate in structural concrete, the mix needs to incorporate 5% of silica fume.
recycled aggregate to 80% recycled aggregate and with more percentage replacement of recycled aggregate used in the concrete specimen, the percentage of tensile strength remained are gradually decreasing. 3. Concrete made with recycled aggregate produced from construction and demolition waste has a compressive strength
Journals. Information. For Authors For Reviewers For Editors For Librarians For Publishers For Societies. Article Processing Charges Open Access Policy Institutional Open Access Program Editorial Process MDPI Blog Research and Publication Ethics. ... New Trends in Recycled Aggregate Concrete. Jorge de Brito , Chi Sun Poon and Baojian Zhan (Eds ...
Use of recycled concrete aggregate in concrete: a review. The use of recycled concrete aggregate (RCA) in concrete as partial and full replacements of natural coarse aggregate is growing interest in the construction industry, as it reduces the demand for virgin aggregate.
aggregates, recycled aggregates are weaker, more porous and have higher values of water absorption. The results of research studies by Hendriks et al. (1998) show that, when recycled aggregates obtained from crushed concrete are used to replace up to 20% by weight of the coarse natural aggregate in concrete, little effect on the properties of
Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2020 > Accepted Manuscript Cite this article as: Progress in Developing Self-Consolidating Concrete (SCC) Constituting Recycled Concrete Aggregates: A Review
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
International Journal of Science and Research (IJSR) is published as a Monthly Journal with 12 issues per year. Significance of Silica Fume and Glass Fiber on the Mechanical Properties of Recycled Aggregate Concrete
Experimental Case Study of Recycled Aggregate Concrete Using Bituminous Pavement Wastes Mohsin Khan1 1M.Tech Student, Civil Engineering Department, HCTM Technical Campus, Kaithal, Haryana, India -----***-----Abstract:-In general, aggregate make up 60-75% of concrete volume, so their selection is important, also they control concrete properties.
Recycled aggregate occurs as either recycled concrete aggregate (RCA) or recycled asphalt pavement (RAP). Recycling concrete and asphalt has been taking place in the USA since at least the early 1970s (Nanasy 1972), and by the 1990s was a well-established activity.
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.
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Mar 29, 2013 · By collecting the used concrete and breaking it up, recycled concrete aggregate (RCA) is created (Fig. 1). This paper focuses on coarse RCA which is the coarse aggregate from the original concrete that is created after the mortar is separated from the rock which is reused.
The hardened concrete properties are discussed in terms of compressive, splitting tensile, flexure and bond strengths. The obtained results show that, the using of water reducer admixture enhances the main fresh and hardened properties of self-curing high-strength concrete cast using recycled aggregate.
Use of Recycled concrete wastes can solve the problem of dumping of such wastes on valuable landfill and decreases the depletion of natural resources. In this research, the fresh and hardened properties of concrete using recycled concrete aggregate as coarse and fine aggregates were evaluated. Two series of RCA concrete aggregates were used.
Abstract: As an eco-material, the application of recycled aggregate concrete and rapid repair concrete has been deeply researched in recent years. But the application of recycled aggregate concrete with recycled fine aggregate and recycled powder in pavement rapid repair project is seldom.
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10/1/2013 · Read "Green recycled aggregate concrete, Construction and Building Materials" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
The recycled aggregate improves particle morphology and basic properties. Compare the effect of recycled aggregate on the strength of pervious concrete before and after strengthening to improve the utilization rate of recycled aggregate in pervious concrete.
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Concrete mixer is used to mix cement with aggregates including sand or gravel, and water to form concrete. The concrete mixers must not only achieve the uniformity of the mix, but they should also discharge the mix without disturbing that uniformity. When in absence of concrete mixers or while working on small jobs, concrete is sometimes mixed ...
May 14, 2015 · Utilizing recycled aggregate is certainly an important step towards sustainable development in the concrete industry and management of construction waste. Recycled aggregate (RA) is a viable alternative to natural aggregate, which helps in the preservation of the environment.
performance of recycled fine aggregate in concrete, use of silica fumes in recycled aggregate concrete, use of fly ash in recycled aggregate concrete etc are shown with experimental reasons. In general, present status of recycled aggregate in India with their future need and its successful utilization were discussed here.
The use of plastic is increasing day by day, although steps were taken to reduce its consumption. This creates substantial garbage every day which is much unhealthy. A healthy and sustainable reuse of plastics offers a host of advantages. The suitability of recycled plastics as coarse aggregate in concrete and its advantages are discussed here.
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Jinson-sustainable Concrete Using Recycled Aggregates - Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online.