Influence of recycled aggregate quality and proportioning criteria on recycled concrete properties

López-Gayarre, F.; Ros, Pedro Serna; Domingo-Cabo, A.; Serrano-López, Miguel A.; López‐Colina, Carlos

doi:10.1016/j.wasman.2009.07.010

Cited by 131 publications

(47 citation statements)

References 7 publications

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“…From the available literature, it was found that the mechanical properties of RCA are inferior to those of NCA (Hansen 1992;ECCO 1999;Poon et al 2003;López-Gayarre et al 2009;Malešev et al 2010). The key mechanical properties of NCA and RCA are shown in Table 2 and briefly discussed hereafter.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Use of Recycled Concrete Aggregate in Concrete: A Review

Safiuddin

Alengaram

Rahman

et al. 2013

Journal of Civil Engineering and Management

142

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Abstract. 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. In addition, the use of RCA leads to a possible solution to the environmental problem caused by concrete waste and reduces the negative environmental impact of the aggregate extraction from natural resources. This paper presents a comprehensive review on the use of RCA in concrete based on the experimental data available in the published research. The most important physical, mechanical, and chemical properties of RCA are discussed in this paper. However, more emphasis has been given to discuss the effects of RCA on the fresh and hardened properties and durability of concrete. This paper also identifies the gaps existing in the present state of knowledge on RCA and RCA concrete and provides some recommendations for future research. Keywords: concrete; natural coarse aggregate; recycled concrete aggregate; fresh properties; hardened properties; durability.

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Section: Mechanical Propertiesmentioning

confidence: 99%

Use of Recycled Concrete Aggregate in Concrete: A Review

Safiuddin

Alengaram

Rahman

et al. 2013

Journal of Civil Engineering and Management

142

View full text Add to dashboard Cite

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“…-increased water absorption [7][8][9], -decreased bulk density [3,10], -decreased specific gravity [3], -increased abrasion loss [3,11,12], -increased crushability [3], -increased quantity of dust particles [3], -increased quantity of organic impurities if concrete is mixed with earth during building demolition [3], and -possible content of chemically harmful substances, depending on service conditions in building from which the demolition and crushing recycled aggregate is obtained [3].…”

Section: Basic Properties Of Concrete With Recycled Concrete Aggregatementioning

confidence: 99%

Recycled Concrete as Aggregate for Structural Concrete Production

2010

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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 made entirely with natural aggregate (NAC) as a control concrete and two types of concrete made with natural fine and recycled coarse aggregate (50% and 100% replacement of coarse recycled aggregate). Ninety-nine specimens were made for the testing of the basic properties of hardened concrete. Load testing of reinforced concrete beams made of the investigated concrete types is also presented in the paper. Regardless of the replacement ratio, recycled aggregate concrete (RAC) had a satisfactory performance, which did not differ significantly from the performance of control concrete in this experimental research. However, for this to be fulfilled, it is necessary to use quality recycled concrete coarse aggregate and to follow the specific rules for design and production of this new concrete type.

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“…Similarly, the 28 days hardened density of RAC was 9.4% lower compared with NAC, as old mortar that adhered to the RA reduces the density of aggregate, as shown in Table 5. López-Gayarre et al (2009) [47] stated that the density of concrete is clearly affected by the type of aggregate. It has been found that incorporation of RHA, POFA and POCP in RAC did not affect the density.…”

Section: Fresh and Hardened Densitymentioning

confidence: 99%

Evaluation of Industrial By-Products as Sustainable Pozzolanic Materials in Recycled Aggregate Concrete

et al. 2017

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Abstract:The utilization of traditional supplementary cementitious materials (SCMs) has become more intense in the concrete industry due to their better long-term properties. This research evaluates the fresh and hardened properties of concrete that was developed using a high amount of recycled aggregate (RA) incorporated with sustainable SCMs. Rice husk ash (RHA), palm oil fuel ash (POFA) and palm oil clinker powder (POCP) were used as SCMs at 10%, 20% and 30% cement replacement levels to investigate their positive role in the performance of RA concrete. The results showed that the 10% replacement level of cement by RHA produced the highest strength at all ages tested. Although POFA and POCP were found to negatively affect the strengths at an early age, the hardened properties showed improvement after a relatively long curing time of 90 days. In addition, the targeted compressive strength of 30 MPa was achieved by using SCMs at levels up to 30%. Overall, the sustainable SCMs can reduce the quantity of cement required for concrete production, as well as reduce the conventional cement with the industrial by-products, which are considered as waste materials; thus, the concrete produced using up to 30% of SCMs as a replacement for cement could be considered as more environmentally-friendly concrete.

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Influence of recycled aggregate quality and proportioning criteria on recycled concrete properties

Cited by 131 publications

References 7 publications

Use of Recycled Concrete Aggregate in Concrete: A Review

Use of Recycled Concrete Aggregate in Concrete: A Review

Recycled Concrete as Aggregate for Structural Concrete Production

Evaluation of Industrial By-Products as Sustainable Pozzolanic Materials in Recycled Aggregate Concrete

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