Influence of recycled concrete aggregates on the engineering and durability properties of alkali activated slag concrete

Kathirvel, Parthiban; Mohan, K. Saravana Raja

doi:10.1016/j.conbuildmat.2016.12.050

Cited by 122 publications

(39 citation statements)

References 33 publications

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“…Khan et al reported that the losses in the compressive strengths of the geopolymer concrete immersed in the 3.1% Na 2 SO 4 solution for 3 months decreased with increasing BFS amount. It stated that by Parthiban and Mohan, as the amount of recycled concrete aggregate in geopolymer concrete immersed in both the Na 2 SO 4 and MgSO 4 solution increased, the losses in the compressive strength of the samples increased. Sodium hydroxide interacting with sodium sulfate negatively affected the compressive strength of geopolymer by filtering through geopolymer concrete .…”

Section: Resultsmentioning

confidence: 99%

“…The samples that completed the curing period were kept in 3.1% Na 2 SO 4 solution for 6 months. Parthiban and Mohan studied the effect of recycled concrete aggregate on geopolymer concrete. NaOH and Na 2 SiO 3 activated geopolymer concrete containing slag was produced.…”

Section: Introductionmentioning

confidence: 99%

“…The alkaline activation of slag has been extensively studied . However, current research gives a better idea of the behavior of the two different binders‐based geopolymer concretes in the chemical solutions.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of sulfate and salt resistance of ferrochrome slag and blast furnace slag‐based geopolymer concretes

Özcan

Karakoç

2019

Structural Concrete

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In this study, mechanical, visual, and microstructure changes of geopolymer concrete exposed to sulfate and salt effects were investigated. Elazı g ferrochrome slag (EFS) and blast furnace slag (BFS)-based geopolymer concretes which completed curing time were immersed in 5% sodium sulfate (Na 2 SO 4 ), magnesium sulfate (MgSO 4 ), sodium chloride (NaCl), and magnesium chloride (MgCl 2 ) solutions for 12 weeks. The compressive strength values, ultrasonic pulse velocities, visual inspections, weight, and length changes of the samples were determined in this investigation. In addition, scanning electron microscopy was performed for the microstructure analysis of the samples removed from the solutions. Sulfate solutions had a more negative effect on the samples than salt solutions. As the EFS ratio in the mixture increases, the loss rate in the strength of the samples exposed to sulfate and salt solutions decreased. While samples exposed to sodium chloride, sodium sulfate, and magnesium sulfate solutions occurred weight gain, samples exposed to magnesium chloride occurred weight loss. The samples in salt solutions shrank, while the samples in sulfate solutions expanded. No deterioration occurred on the surfaces of the samples exposed to the solutions for 12 weeks. K E Y W O R D S blast furnace slag, chemical resistance, ferrochrome slag, geopolymer concrete, salt effect, sulfate effect

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluation of sulfate and salt resistance of ferrochrome slag and blast furnace slag‐based geopolymer concretes

Özcan

Karakoç

2019

Structural Concrete

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“…As a general rule, the replacement of siliceous sand by C&DW aggregate lowered mechanical strengths in AAS and AAFA mortars. Parthiban et al (21) studied the influence of RCA on AAS concretes. They observed that the replacement up to 100% of NA presented very good performance.…”

Section: Introductionmentioning

confidence: 99%

Viability of the use of construction and demolition waste aggregates in alkali-activated mortars

2018

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This study explores the technological feasibility of using construction and demolition waste (C&DW) as recycled aggregate in alkali activated mortars, ascertaining the mechanical and microstructural behavior. Shrinkage behavior of alkali activated slag mortars (AAS) and fire resistance of alkali activated fly ash (AAFA) incorporating recycled aggregates have been also tested Normalized siliceous sand and two types of recycled concrete aggregates were used in the mixes at different proportions. The findings showed that water demand was higher in mortars prepared with recycled aggregate. Partial replacement (20% - 80/20) of conventional aggregate with the recycled material was also observed to yield mortars with high mechanical strength, although total porosity also rose. Total replaclement, gave worse mechanical performance however. Fire resistance and shrinkage studies conducted indicated that alkaline cement mortars prepared with 80/20 recycled aggregated exhibit acceptable performance.

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“…The materials of geological origin and industrial byproducts such as fly ash, GGBFS, etc. [3,4] which are rich in Silica and Alumina can be used as a GSM in the development of geopolymer concrete. In spite of their diverse chemical composition and reactions [5,6] geopolymer concretes shows a number of attributes similar to conventional cement concrete whereas, a least number of works were attempted in the past to evaluate the bond behaviour steel reinforcement in geopolymer concrete.…”

Section: Introductionmentioning

confidence: 99%

Bond characteristics of reinforcing steel embedded in geopolymer concrete

Kathirvel

Thangavelu

Gopalan

et al. 2017

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. The force transferring between reinforcing steel and the surrounding concrete in reinforced concrete is influenced by several factors. Whereas, the study on bond behaviour of geopolymer concrete (GPC) is lagging. In this paper, an experimental attempt has been made to evaluate the geopolymer concrete bond with reinforcing steel of different diameter and embedded length using standard pull out test. The geopolymer concrete is made of ground granulated blast furnace slag (GGBFS) as geopolymer source material (GSM). The tests were conducted to evaluate the development of bond between steel and concrete of grade M40 and M50 with 12 and 16 mm diameter reinforcing steel for geopolymer and cement concrete mixes and to develop a relation between bond strength and compressive strength. From the experimental results, it has been observed that the bond strength of the geopolymer concrete mixes was more compared to the cement concrete mixes and increases with the reduction in the diameter of the bar.

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Influence of recycled concrete aggregates on the engineering and durability properties of alkali activated slag concrete

Cited by 122 publications

References 33 publications

Evaluation of sulfate and salt resistance of ferrochrome slag and blast furnace slag‐based geopolymer concretes

Evaluation of sulfate and salt resistance of ferrochrome slag and blast furnace slag‐based geopolymer concretes

Viability of the use of construction and demolition waste aggregates in alkali-activated mortars

Bond characteristics of reinforcing steel embedded in geopolymer concrete

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