Mechanical performance of concrete made with aggregates from construction and demolition waste recycling plants

Bravo, Miguel; Brito, Jorge de; Pontes, Jorge; Evangelista, Luís

doi:10.1016/j.jclepro.2015.03.012

Cited by 366 publications

(166 citation statements)

References 32 publications

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“…Obtained results are similar to those presented by Jiménez et al (2013) with replacement ratio of The highest values of dry density were presented by natural sand. Values observed in recycled mortars were quite similar, and observed density values are caused by low density of RA (Bravo et al, 2015 ). Obtained results are similar to the findings of other studies Oiménez et al, 2013;Vegas et al, 2009).…”

Section: Partsupporting

confidence: 91%

Comparative study of three types of fine recycled aggregates from construction and demolition waste (CDW), and their use in masonry mortar fabrication

Saíz

Cortina

Martínez

et al. 2016

Journal of Cleaner Production

153

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This research aims to study feasibility of incorporation of fine fraction of recycled aggregates coming from construction and demolition waste in cement-based masonry mortar fabrication. Initially, three types of recycled aggregates: concrete, mixed and ceramic recycled aggregates, were characterized in terms of physical, mechanical and chemical properties. There were used 1 :3 and 1 :4 cement-toaggregate proportions and replacement percentages of 50%, 75% and 100% respectfully far three types of studied recycled aggregates.Physical characterization of recycled aggregates shows a continuous size distribution curve, lower density and higher absorption, what makes the usage of additive necessary to obtain appropriate consistency. Main crystalline phases shown in the X-ray diffraction analysis were: calcite, quartz and gypsum. According to the results of the dosages study, recycled mortars present poorer behaviour than mortars fabricated using natural stand, however, complying with the limits established by the standards and manufacturers. Therefore, the results of this study suggest the possibility to replace 100% of natural sand with analyzed recycled aggregates.

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Section: Partsupporting

confidence: 91%

Comparative study of three types of fine recycled aggregates from construction and demolition waste (CDW), and their use in masonry mortar fabrication

Saíz

Cortina

Martínez

et al. 2016

Journal of Cleaner Production

153

View full text Add to dashboard Cite

show abstract

“…This proportion is approximately four times larger than the waste produced by households and almost outnumbers the other types of waste dumped in landfills by over 50% [6]. The construction waste in landfills comprise 69% timber, 12% concrete, 10% metal, 7% brick, 0.43% plastic, and 2% other materials [5].…”

Section: Introductionmentioning

confidence: 97%

“…The construction waste in landfills comprise 69% timber, 12% concrete, 10% metal, 7% brick, 0.43% plastic, and 2% other materials [5]. According to Bravo et al [6], given the differences in the composition of RCA and natural aggregate, the mechanical properties of the concrete that uses 100% RCA as a substitute aggregate are expected to decline in the future.…”

Section: Introductionmentioning

confidence: 99%

“…Specifically, the compressive strength of the concrete increased by 12% compared with that of the reference concrete as the percentage of ceramic waste used to substitute natural aggregate increased to 25%. Bravo et al [6] investigated the possibility of substituting 15%, 20%, and 25% of natural coarse aggregate with recycled ceramic coarse aggregate, and then analyzed the effects of such substitution on the morphology and microstructure of the recycled concretes and on the mechanical behavior of these eco-efficient concretes.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical properties of concrete containing recycled concrete aggregate (RCA) and ceramic waste as coarse aggregate replacement

Khalid

Azmi

Sumandi

et al. 2017

AIP Conference Proceedings

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Abstract. Many construction and development activities today consume large amounts of concrete. The amount of construction waste is also increasing because of the demolition process. Much of this waste can be recycled to produce new products and increase the sustainability of construction projects. As recyclable construction wastes, concrete and ceramic can replace the natural aggregate in concrete because of their hard and strong physical properties. This research used 25%, 35%, and 45% recycled concrete aggregate (RCA) and ceramic waste as coarse aggregate in producing concrete. Several tests, such as concrete cube compression and splitting tensile tests, were also performed to determine and compare the mechanical properties of the recycled concrete with those of the normal concrete that contains 100% natural aggregate. The concrete containing 35% RCA and 35% ceramic waste showed the best properties compared with the normal concrete.

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“…Based the study on mechanical performance of concrete made with aggregates from construction and demolition waste recycling plants, the sharp shape of the aggregates make the bulk density lower compare to NA [4]. Moreover, the high substitution of RCA in concrete mix gives high value of water absorption and lower density compare to NA.…”

Section: Introductionmentioning

confidence: 99%

A study on the performance of concrete containing recycled aggregates and ceramic as materials replacement

Azmi

Khalid

Irwan

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Natural fine aggregate materials are commonly used in development and commercial construction in Malaysia. In fact, concrete production was increased as linear with the growing Malaysia economy. However, an issue was production of concrete was to locate adequate sources of natural fine aggregates. There lot of studies have been conducted in order to replace the fine aggregate in which natural fine aggregate replace with the waste material in concrete preparation. Therefore, this study aims to utilize the Recycled Concrete Aggregate (RCA) and ceramic waste which has great potential to replace the natural aggregate in concrete mix with different type of method, admixture, and parameters. This research were focused on compressive strength and water absorption test to determine the optimum mix ratio of concrete mix. The concrete aggregate was chosen due to improvement capillary bonding mechanisms and ceramic presented similar strength compared to the conventional concrete using natural aggregate. Percent of replacement have been used in this study was at 25%, 35% and 45% of the RCA and 5%, 10% and 15% for ceramic, respectively. Furthermore, this research was conduct to find the optimum percentage of aggregate replacement, using water-cement ratio of 0.55 with concrete grade 25/30. The best percentage of replacement was the RCA35% C15% with the compressive strength of 34.72MPa and the water absorption was satisfied.

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Mechanical performance of concrete made with aggregates from construction and demolition waste recycling plants

Cited by 366 publications

References 32 publications

Comparative study of three types of fine recycled aggregates from construction and demolition waste (CDW), and their use in masonry mortar fabrication

Comparative study of three types of fine recycled aggregates from construction and demolition waste (CDW), and their use in masonry mortar fabrication

Mechanical properties of concrete containing recycled concrete aggregate (RCA) and ceramic waste as coarse aggregate replacement

A study on the performance of concrete containing recycled aggregates and ceramic as materials replacement

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