Durability evaluation of geopolymer and conventional concretes

Albitar, M.; Ali, M.S. Mohamed; Visintin, Phillip; Drechsler, M.

doi:10.1016/j.conbuildmat.2017.01.056

Cited by 466 publications

(132 citation statements)

References 19 publications

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“…Singh et al notified that the loses compressive strengths of geopolymer and PC concrete kept in 10% NaCl solution for 90 days were 6.2 and 9.2%, respectively. Albitar et al stated that losses in the compressive strengths of the geopolymer concrete samples soaked in the 5% NaCl solution for 9 months were approximately 5%. In the literature given above, it was seen that the compressive strengths of the geopolymer samples exposed to salt decrease.…”

Section: Resultsmentioning

confidence: 99%

“…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 . Ren et al stated that as the concentration of sodium sulfate solutions increased, the compressive strength of the samples decreased.…”

Section: Resultsmentioning

confidence: 99%

“…Wei et al stated that as the milling time of vanadium which was used as a binder in geopolymer concrete increase, the weight loss in the samples immersed in 5% sodium sulfate solution decreased. Albitar et al stated that the weight increases of FA‐based geopolymer concrete soaked in different sulfate solutions for 9 months were between 0.7 and 1.9%.…”

Section: Resultsmentioning

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: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

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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“…Durability of concrete strongly affects the service life of structural members. Durable concrete protects embedded reinforcing steel from corrosion and reduces the potential for concrete spalling under chemical attack [2]. The durability of building materials is related to the presence of cracks as they provide a fast pathway for penetrate of liquid and gases through the structure.…”

Section: Durabilitymentioning

confidence: 99%

A Review Paper on Sustainable Cost Effective Concrete for Corrosive Environment

Darwin¹,

Usha²

2019

CER

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For its favorable properties and easily availability, the use of concrete increasing annually. When the concrete exposed to environment it start to disintegrate due to chemical attack. The chemical attacks on concrete majorly are in the form of a reaction between aggressive agents and the cement matrix, although reactions can also happen with the aggregates. This review paper gives a suggestion to make a cost effective and durable concrete to perform well in the aggressive corrosion environment by the waste products obtained from different industry. The use of Portland cement concrete has an impact on the environmental due to the emission of CO2 in the atmosphere. On the other side handling of plastic waste was a major problem all over the world. So, as to give suggestion to these problems the study has been made as the use of rice husk ash (obtained from agricultural waste) and silica fume (obtained from alloy industry) as partial replacement of Portland cement to increase strength at early and later ages. And due to its micro structure it reduce the permeability of concrete and exhibit considerable enhancement in durability, also provides better bond between cement matrix and the aggregate. The usage of LDPE is high throughout the world compared to other plastics, the density of LDPE range from 925-940 kg/m 3 so the density of the concrete greatly reduce up to 30% as their wastes can be used as a replacement for fine aggregate.. In terms of durability the high amount of silica impregnated the concrete samples and thereby reduces porosity of concrete. The strength reduction due to plastics will nearly compensated by the RHA and SF. The use of such waste products gives cost effective and reducing co2 emission and best method for the disposal of plastic wastes.

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“…For example, geopolymer cementitious materials (GPs) and alkali-activated cementitious materials (AAMs) are synthesized from industrial wastes, such as slag, fly ash, metakaolin, and others as raw materials with alkaline activator [6][7][8][9][10][11][12][13][14]. ese cementitious materials have many advantages over ordinary Portland cement (OPC) in environmental protection (reducing CO 2 emissions, saving energy, and waste utilization) [15][16][17][18], mechanical properties [19,20], and durability [21][22][23]. Alkali-activated slag (AAS) is one of the most important cementitious materials which is made by slag and alkaline activator completely replacing the cement.…”

Section: Introductionmentioning

confidence: 99%

Effect of Polypropylene Fiber on Properties of Alkali‐Activated Slag Mortar

Chen

Wang

2020

Advances in Civil Engineering

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Alkali-activated slag (AAS) is becoming an increasingly popular building material due to its excellent engineering properties and low CO 2 emissions, but its large shrinkage is an important reason to restrict its application and popularization. is work is aimed to study the possibility of inhibiting the shrinkage of AAS mortar by incorporating polypropylene fiber (PPF). For this, an experimental study was carried out to evaluate the effects of PPF content on setting time, fluidity, physical properties, mechanical properties, impact resistance, and microstructure of AAS mortar. e volume content of PPF is 0.05%, 0.1%, 0.15%, and 0.2%. e working, physical (porosity, water absorption, and bulk density), mechanical, shrinkage, and impact resistance properties of the AAS mortars were evaluated. e results show that incorporating PPF effectively reduces the shrinkage deformation of AAS mortar, significantly improves its impact resistance, enhances its toughness, and slightly improves its compressive strength in the later stage. At the same time, PPF delays the initial setting time of AAS mortar and reduces the fluidity, density, porosity, and water absorption of AAS mortar. SEM results show that the bridging effect of PPF between AAS mortars can inhibit the generation and propagation of cracks, improve the internal microstructure, and enhance the performance of AAS mortar.

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Durability evaluation of geopolymer and conventional concretes

Cited by 466 publications

References 19 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

A Review Paper on Sustainable Cost Effective Concrete for Corrosive Environment

Effect of Polypropylene Fiber on Properties of Alkali‐Activated Slag Mortar

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