Performance and durability of self compacting concrete using recycled concrete aggregates and natural pozzolan

Omrane, Mohammed; Kenaï, Saïd; Kadri, El-Hadj; Aït‐Mokhtar, Abdelkarim

doi:10.1016/j.jclepro.2017.07.139

Cited by 152 publications

(48 citation statements)

References 23 publications

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“…Increasing the amount of RCA decreases the slump diameter slightly which agrees with most researchers findings [21][22][23], as well as the flow time has increased by adding 50% of RCA and that is mainly related to the shape and texture of RCA compared with the NA that have been used. While the RCA has greater surface roughness and relatively big amount fine particles, which were a result of the processes of crushing, these factors affect the slump diameter and the flow time of the mixtures directly against increasing the amount of the involved RCA.…”

Section: Slump Flow and V-funnelsupporting

confidence: 89%

Fresh properties of the selfcompacting high-performance concrete using recycled concrete aggregate

Abed¹,

Nemes²

2019

Epitoanyag - JSBCM

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The present study is investigating the fresh properties of the self-compacting high-performance concrete (SCHPC) using recycled concrete aggregate and waste powder materials. Twenty-one mixtures with the same water to binder ration have been tested for both slump flow and V-funnel tests. Their results shows that using recycled concrete aggregate (RCA) up to 50% is not affecting the workability of SCHPC if the water absorption of RCA is compensated, however, waste powder materials are affecting the fresh properties negatively and demanded higher dosage of chemical admixture. Their effect differentiates depending on the grading and particles properties of the waste powder material. The workability results of SCHPC using recycled aggregate and waste powder materials are satisfying the workability process of normal SCC, which is specified in the European Guideline for Self-compacting Concrete regulations (EFNARC).

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Section: Slump Flow and V-funnelsupporting

confidence: 89%

Fresh properties of the selfcompacting high-performance concrete using recycled concrete aggregate

Abed¹,

Nemes²

2019

Epitoanyag - JSBCM

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“…The effect of RCA incorporation on the mechanical and hardened properties of SCC depends on different parameters such as mix proportion and the RCA replacement percentage, size and quality of RCA and supplementary materials. In general, low replacement percentage of RCA (up to 50%) are not significantly influenced the mechanical properties of SCC [52][53][54][55]. The strength of SCC is one of the most important factors to determine the application of RCA-SCC.…”

Section: Compressive Strengthmentioning

confidence: 98%

Influence of Surface Treatment of Recycled Aggregates on Mechanical Properties and Bond Strength of Self-Compacting Concrete

et al. 2019

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In the last decade there has been a massive growth for development of concrete infrastructures all around the world. Take into account environmental concerns, concrete technology should direct efforts toward assuring development and fabrication of sustainable and resilient concrete. For this purpose, incorporation of recycled concrete aggregate in concrete products particularly self-compacting concrete (SCC) for structural and non-structural application would be significant achievement. In this study the fresh and hardened properties of SCC prepared by substituting natural aggregates (NA) with recycled coarse aggregates (RCA). In addition, bonding behaviour of reinforced RCA-SCC for structural application was investigated. Moreover, surface treatment of RCA using lithium silicate solution was proposed to investigate its feasibility to improve the fresh and hardened properties of SCC as well as its bonding strength. The mechanical properties including compressive strength, tensile strength and elastic modulus of SCC mixes using untreated RCA and treated RCA (TRCA) were investigated. The results showed an improvement in performance of SCC mixes made with TRCA in compare with the untreated samples. The bond behaviour between SCC made with RCA and steel reinforcement was studied and the relationship between the brittleness and bonding of SCC mixes using untreated RCA and TRCA determined. The effect of surface treatment on the interfacial transition zone (ITZ) between adhered mortar and RCA studied using scanning electron microscope (SEM). It was determined that the treatment of RCA improved the bond at the ITZ through densification. The results gave experimental evidence of the suitability of RCA-SCC for structural use and application in reinforced concrete.

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“…The usage of 50% RFA and RCA in SCC exhibited better enforcement and durability. The embodiment connected with 15% and 20% usage of Pozzolana in NSCC and RSCC reduced the depth of penetration by 50% of chloride ions and additionally diminishes the weight loss when specimens immersed beneath sulfuric acid attack [7].…”

Section: Introductionmentioning

confidence: 99%

The Influence of the Addition of Fibers on Properties of Self-Compacting Concrete Produced with Recycled Coarse Aggregate

Hussain¹,

Ramesh²,

Potharaju³

2019

IJRTE

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All over the world, wide amount of demolishing waste is being generated posing lot of environmental issues. To address these issues, Self-Compacting Concrete (SCC) was made by replacing cement partially with mineral admixtures and NCA with RCA. The fresh and hardened properties for M30 grade of SCC made with NCA and RCA were evaluated. Cement in SCC was recouped partly with 30% Fly Ash, 20% GGBS by weight of the cement. Polypropylene fibers at 0.1% were added to study their influencing nature on the hardened state and fresh state properties of the SCC mix. Four sequences of SCC mixes of M30 were prepared by substituting the NCA with RCA at 25%, 50%, 75% and 100% derived from the dismantled concrete waste of M30 parent grade. SCC produced with the RCA up to 50% and with 0.1% addition of Fibers demonstrated comparable performance as that of SCC with NCA.

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Performance and durability of self compacting concrete using recycled concrete aggregates and natural pozzolan

Cited by 152 publications

References 23 publications

Fresh properties of the selfcompacting high-performance concrete using recycled concrete aggregate

Fresh properties of the selfcompacting high-performance concrete using recycled concrete aggregate

Influence of Surface Treatment of Recycled Aggregates on Mechanical Properties and Bond Strength of Self-Compacting Concrete

The Influence of the Addition of Fibers on Properties of Self-Compacting Concrete Produced with Recycled Coarse Aggregate

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