Comparisons of natural and recycled aggregate concretes prepared with the addition of different mineral admixtures

Kou, Shi Cong; Poon, Chi Sun; Agrela, Francisco

doi:10.1016/j.cemconcomp.2011.05.009

Cited by 525 publications

(207 citation statements)

References 45 publications

(19 reference statements)

Supporting

Mentioning

143

Contrasting

Unclassified

Order By: Relevance

“…Similar values of the strength ratio for concrete with RCA and fly ash is reported in articles [37,39,41,42].…”

Section: Compressive Strength Of Concretesupporting

confidence: 66%

“…The lowest strength was measured (39.1 MPa) on series II with fly ash and no other additives. Insignificant influence of RCA and fly ash on concrete strength after 28 and 90 days was also reported in [38,39]. Compressive strength after 90 days for the first three series (I-III and I R -III R) is also higher for concretes mixed natural aggregate.…”

Section: Compressive Strength Of Concretementioning

confidence: 67%

“…In [46] much more decrease of chloride migration coefficient for concrete with Class-F fly ash addition was reported. And the paper [39] reported negative influence of RCA on the chloride ion penetration and positive influence of SF addition for concretes with both RCA and natural aggregates. "Acceptable" range.…”

Section: Chloride Migration Coefficient Of Concretementioning

confidence: 99%

See 2 more Smart Citations

Influence of SCM on the Permeability of Concrete with Recycled Aggregate

Kubissa

Jaskulski

Brodňan

2016

Period. Polytech. Civil Eng.

View full text Add to dashboard Cite

The article presents experimental analysis of concretes mixed by using natural and low quality recycled concrete aggregate (RCA) Roman JaskulskiWarsaw University of Technology Branch in Płock, Poland e-mail: romanjas@pw.plock.pl Miroslav BrodnanUniversity ofZilina, Slovakia e-mail: brodnan@fstav.uniza.sk IntroductionIncreasing the use of recycled concrete aggregate (RCA) and supplementary cementitious materials (SCM) in concrete industry can considerably enhance the environmental friendliness of concrete production. The availability of natural sources of aggregates, which makes up about 60%-70% of concrete volume, is becoming more limited due to restrictions on quarrying operations and longer hauling distances. The disposal of old concrete, which remains from demolished structures, is still a problem and frequently it is deposited in the landfills [1]. So a growing trend to replace the traditional concrete constituents with more sustainable materials is increasingly present in concrete technology. Using RCA as a substitute for natural aggregates and SCM as a partial cement replacement in concrete mixtures is a way to potentially address the economic and environmental concerns. Dosho 2007 [2] wrote about papers on recycled aggregate concrete that has been published just after World War II: physical properties by Glruzhge in 1946, Russia, and the influence of mixture impurities by Graf in 1948, Germany. First detailed test results on application of the RCA in concrete technology were published by Nixon in 1978 [3]. He suggested that the main field in which more information about the behaviour of the recycled concrete is required is its durability. The studies on the application of RCA into concrete mixture have mainly concerned mix design [4,5], mechanical properties [6][7][8], structural performance [9,10] and the final purpose [11,12]. Until now many of the durability parameters have been investigated and technological recommendation and detailed requirements according to quality of RCA has been drawn [13]. It has been stated that is possible to design and prepare durable concretes by using adequately good quality RCA. The aggregate characteristics of density, porosity and water absorption are a primary focus in determining the proper concrete mixture and the required concrete properties. These characteristics should be known to limit water absorption capacity of aggregates to no more than 5% for structural concrete, and thus the proportion of RCA is often limited in concrete mixes [13,14].Most of the research concerning RCA quality and the durability of concrete mixed by using RCA has been performed in

show abstract

“…Similar values of the strength ratio for concrete with RCA and fly ash is reported in articles [37,39,41,42].…”

Section: Compressive Strength Of Concretesupporting

confidence: 66%

Section: Compressive Strength Of Concretementioning

confidence: 67%

Section: Chloride Migration Coefficient Of Concretementioning

confidence: 99%

See 1 more Smart Citation

Influence of SCM on the Permeability of Concrete with Recycled Aggregate

Kubissa

Jaskulski

Brodňan

2016

Period. Polytech. Civil Eng.

View full text Add to dashboard Cite

show abstract

“…In comparison with the tensile strength of the control mix, the splitting tensile strength of RAC mixes declined by 7% and 9% at RA contents of 50% and 100%, respectively, as can be seen in Table 4 and Figure 5. Previous studies [35][36][37] also reported reduction in the splitting tensile strength of concrete when the natural coarse aggregate was replaced by RA. Positive e ect on the splitting tensile strength of the RAC mixes can be observed when nanoparticles are added to these mixes ( Figure 5).…”

Section: Splitting Tensile Strengthmentioning

confidence: 99%

Feasibility of Using Nanoparticles of SiO₂ to Improve the Performance of Recycled Aggregate Concrete

Younis

Mustafa

2018

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

e aim of this paper was to examine the feasibility of using nanoparticles of SiO 2 (nanosilica) to improve the performance of recycled aggregate concrete (RAC) containing recycled aggregate (RA) derived from processing construction and demolition waste of concrete buildings. e examined properties include compressive strength, splitting tensile strength, and water absorption. e study also includes examining the microstructure of RA and RAC with and without nanoparticles of SiO 2 . In total, nine mixes were investigated. Two mixes with RA contents of 50% and 100% were investigated and for each RA content; three mixes were prepared with three different nanoparticles dosages 0.4%, 0.8%, and 1.2% (by mass of cement). A control mix with natural aggregate (NA) was also prepared for comparison reasons. e results show that nanoparticles of silica can improve the compressive strength, tensile strength, reduce the water absorption, and modify the microstructure of RAC.

show abstract

“…Previous studies have highlighted the benefits of large-scale recycling of concrete waste: its great potential benefits in controlling the over-discharge of construction and demolition wastes that otherwise would have been disposed in landfills, decreases the dependence of the construction industry on natural aggregates, thereby preserving natural resources, provides savings from the treatment of waste disposal, and yields alternative sources for urban areas facing shortage of natural aggregates [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Properties of Recycled Aggregate Concrete Reinforced with Polypropylene Fibre

Mohammad¹,

Ismail²,

Alwi³

2016

MATEC Web Conf.

View full text Add to dashboard Cite

Abstract. This research work is aimed to investigate how the addition of various proportion of polypropylene fibre affects the mechanical strength and permeability characteristics of recycled aggregate concrete (RAC) which has been produced with treated coarse recycled concrete aggregate (RCA). Further research on RAC properties and their applications is of great importance as the scarcity of virgin aggregate sources in close proximity to major urban centers is becoming a worldwide problem. In this study, the hardened RAC properties at the curing age of 7 and 28 days such as compressive strength, flexural strength, ultrasonic pulse velocity (UPV), water absorption and total porosity were evaluated and compare with control specimens. Experimental result indicates that although the inclusion of the treated coarse RCA can enhance the mechanical strength and permeability properties of RAC, Further modification by addition of polypropylene fibre can optimize the results.

show abstract

Comparisons of natural and recycled aggregate concretes prepared with the addition of different mineral admixtures

Cited by 525 publications

References 45 publications

Influence of SCM on the Permeability of Concrete with Recycled Aggregate

Influence of SCM on the Permeability of Concrete with Recycled Aggregate

Feasibility of Using Nanoparticles of SiO₂ to Improve the Performance of Recycled Aggregate Concrete

Properties of Recycled Aggregate Concrete Reinforced with Polypropylene Fibre

Contact Info

Product

Resources

About

Comparisons of natural and recycled aggregate concretes prepared with the addition of different mineral admixtures

Cited by 525 publications

References 45 publications

Influence of SCM on the Permeability of Concrete with Recycled Aggregate

Influence of SCM on the Permeability of Concrete with Recycled Aggregate

Feasibility of Using Nanoparticles of SiO2 to Improve the Performance of Recycled Aggregate Concrete

Properties of Recycled Aggregate Concrete Reinforced with Polypropylene Fibre

Contact Info

Product

Resources

About

Feasibility of Using Nanoparticles of SiO₂ to Improve the Performance of Recycled Aggregate Concrete