Permeability of self-compacting concrete made with recycled concrete aggregates and metakaolin

Kapoor, Kanish; Singh, Surinder P.; Singh, Bhupinder

doi:10.1080/21650373.2017.1280426

Cited by 24 publications

(21 citation statements)

References 30 publications

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“…Another test largely used to access the durability of concrete is the chloride permeability test. Kapoor et al [29] utilized RCA as both fine and coarse aggregates in SCC. They observed an increase in the chloride permeability of the SCC as a result of the incorporation of both the fine and coarse RCA when compared to that of the control with NA.…”

Section: Recycled Concrete Aggregatementioning

confidence: 99%

“…The higher porosity of the RCA has been attributed to this detrimental effect. However, when metakaolin (MK) was used as a partial replacement of OPC in the SCC, a significant decrease in the chloride permeability was observed [29]. This decrease in chloride ion penetration can be ascribed to the pozzolanic and filler effect of MK which densifies the microstructure of the SCC.…”

Section: Recycled Concrete Aggregatementioning

confidence: 99%

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Overview of trends in the application of waste materials in self-compacting concrete production

Adesina

Awoyera

2019

SN Appl. Sci.

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Self-compacting concrete (SCC) production is growing rapidly due to its several advantages in terms of enhanced properties and applications. However, there are associated sustainability issues with the SCC materials. With the demand for SCC expected to continually increase, an ideal solution is therefore required to sustain the technology, such as derivation of alternative materials. Thus, this study explores innovative application of industrial wastes in self-compacting concrete production, with the aim of finding the most appropriate technique in SCC material use. Also, the potential limitations in using some of the waste materials as sustainable alternatives were highlighted. This study found that several materials emanating from industrial rejects have been mostly investigated as a potential material for making SCC, which showed that the incorporation of waste materials into SCC could be a viable approach. However, in order to achieve optimal performance of SCC, an adequate material composition is necessary. It is clear from this study that factors such as embodied carbon, energy and cost of SCC production can notably be reduced with the incorporation of waste materials. The study also identified areas for further investigations that can help in the improvement of SCC for construction applications.

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Section: Recycled Concrete Aggregatementioning

confidence: 99%

Section: Recycled Concrete Aggregatementioning

confidence: 99%

Overview of trends in the application of waste materials in self-compacting concrete production

Adesina

Awoyera

2019

SN Appl. Sci.

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“…Another study which was conducted in [26] reported that the inclusion of 10% of MK enhanced the compressive strength of RAC. Replacing 10% of cement with MK resulted in significant improvement in compressive strength, splitting tensile, and elastic modulus [24,25]. Others reported strength and durability enhancement with the use of 20% of MK in RAC incorporating 100% RCA [25].…”

Section: Introductionmentioning

confidence: 98%

“…Few experimental studies can be found on the effect of the use of MK on the performance of RAC [18,[24][25][26]. e influence of the addition of 15% of MK on the performance of RAC made with 50% and 100% RCA was reported in [18].…”

Section: Introductionmentioning

confidence: 99%

Recycled Aggregate Concrete including Various Contents of Metakaolin: Mechanical Behavior

Younis

Amin

Ahmed

et al. 2020

Advances in Materials Science and Engineering

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This experimental research investigates the effect of utilizing metakaolin (MK) on the behavior of recycled aggregate concrete (RAC). The RAC incorporates recycled coarse aggregate (RCA) originated from crushing construction and demolition waste. The investigated parameters were RCA and MK contents. Tests of workability and mechanical properties such as compressive strength, splitting tensile strength, flexural strength, and modulus of elasticity were conducted to evaluate the influence of MK on workability and mechanical behavior of RAC. In total, 19 mixes were prepared. These mixes are divided into four groups. Group zero (G0) includes a reference mix containing normal coarse aggregate (NCA) and 3 mixes made with 35%, 70%, and 100% of RCA. Each one of the other three groups (G1, G2, and G3) was made with one content of the three contents of RCA, and each group includes five mixes made with the contents of 4%, 8%, 12%, 16%, and 20% of MK. Empirical models among the mechanical properties of the RAC mixes were developed and compared with models of standard codes of practice such as ACI 318, BS 8110, and Eurocode 2. It was found that MK reduces the workability of the RAC mixes. Nonetheless, the outcomes reveal that MK can improve the compressive, splitting tensile, and flexural strengths and the elastic modulus of RAC. This strength improvement enhances as the content of MK increases. The proposed models for the mechanical properties of RAC made with MK showed good correlations. The developed model for modulus of elasticity is quite close to the Eurocode 2 model, whereas the models of ACI 318 and BS 8110 underestimate the values of the modulus of elasticity.

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“…The processing of waste concrete can yield both fine as well as coarse recycled aggregates which have potential applications in concrete. Besides attempts at using recycled concrete aggregates in conventionally vibrated concrete, their application has also been sought to be extended to SCC with both the hardened as well as the durability properties of SCC made with such aggregates being reported in the literature (Ravindrarajah et al 1987;Padmini et al 2002;Safiuddin et al 2011;Poon et al 2004;Xiao et al 2005;Xiao et al 2006;Khatib 2005;Choi and Yun 2013;Etxeberria et al 2007a;Etxeberria et al 2007b;Yang et al 2008;Oikonomou 2005;Kapoor et al 2017). However, relatively little attention has been paid to rheology of SCC made with recycled concrete aggregates.…”

Section: Introductionmentioning

confidence: 99%

Effect of Supplementary Cementitious Materials on Rheology of Different Grades of Self-Compacting Concrete Made with Recycled Aggregates

Singh

Kumar

Singh

2017

ACT

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Permeability of self-compacting concrete made with recycled concrete aggregates and metakaolin

Cited by 24 publications

References 30 publications

Overview of trends in the application of waste materials in self-compacting concrete production

Overview of trends in the application of waste materials in self-compacting concrete production

Recycled Aggregate Concrete including Various Contents of Metakaolin: Mechanical Behavior

Effect of Supplementary Cementitious Materials on Rheology of Different Grades of Self-Compacting Concrete Made with Recycled Aggregates

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