Properties of Geopolymer Mortar Subjected to High Temperature

Ibrahim, Ali Kadhim; AL-Kerttani, Osamah; Abbas, Suha Rasheed

doi:10.4028/www.scientific.net/kem.858.193

Cited by 5 publications

(5 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This caused voids in the sample and adversely affected the mechanical properties of the samples. Ibrahim et al 51 stated that there was a decrease in the strength of metakaolin‐based geopolymer mortars containing SF exposed to 800°C.…”

Section: Resultsmentioning

confidence: 99%

Effect of silica fume and waste rubber on the performance of slag‐based geopolymer mortars under high temperatures

Sağır

Karakoç

Özcan

et al. 2023

Structural Concrete

View full text Add to dashboard Cite

In this study, the fire resistance of slag‐based geopolymer mortars was investigated and the effect of silica fume (SF) and waste rubber (WR) on this resistance was determined. In slag‐based geopolymer mortars activated using 12M NaOH solution, 0%, 5%, and 10% by weight SF was substituted for slag; 0%, 5%, 10%, and 15% WR by volume were substituted for fine aggregate. The samples that completed the curing period were exposed to temperatures of 250°C, 500°C, and 750°C for 1 h, and the mechanical (compressive, flexural and splitting tensile strengths, and impact resistance), physical (weight change and sorptivity) and microstructure (scanning electron microscopy [SEM] and energy dispersive spectroscopy [EDS]) properties of these samples were examined. The compressive strengths of the samples without WR were between 48.10 and 60.97 MPa, and the samples without SF were between 28.52 and 48.10 MPa. Strength losses at 750°C were between 51.5% and 73.5%. As the SF substitution increased, the samples' mechanical and physical properties improved, whereas as the WR substitution increased, the samples' mechanical and physical properties declined. While the SF substitution had a positive effect on the fire resistance of the samples, the WR substitution had a negative effect. It is thought that the choice of geopolymer binder as a binder in the mortar and the use of waste tires as aggregate contribute to the literature in terms of both preventing environmental pollution and ensuring the recycling of these materials.

show abstract

Section: Resultsmentioning

confidence: 99%

Effect of silica fume and waste rubber on the performance of slag‐based geopolymer mortars under high temperatures

Sağır

Karakoç

Özcan

et al. 2023

Structural Concrete

View full text Add to dashboard Cite

show abstract

“…From the analysis of the influencing factors of compressive strength in the previous chapter, the tensile strength performance can be analogously applied. Lbrahim [27] studied the cleavage tensile strength of GC under two variables of SF substitution rate and temperature based on orthogonal experiments. These data revealed the splitting tensile strength of GC is within 400°C, which increases with the increase of combustion temperature, and the downward trend is shown between 400°C and 800°C.…”

Section: Tensile Strengthmentioning

confidence: 99%

Latest Progress of Mechanical Properties of Geopolymer Concrete at Elevated Temperature

Zhu

Zha

2023

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

In order to alleviate the environmental pollution and energy consumption problems caused by ordinary Portland cement, geopolymer came into being as a new type of green building material. The special three-dimensional mesh structure of geopolymer concrete makes it show excellent durability under fire, so it has been deeply studied by many scholars. This paper mainly expounds the research results of the basic static properties of inorganic geopolymer concrete at high temperature from the following four aspects: compressive strength, tensile strength, modulus of elasticity and stress-strain relationship. Due to the obvious differences in the mechanical and structural properties of geopolymer concrete in terms of raw materials, mix ratio, curing temperature, etc. There is no corresponding material and structural design specification for geopolymer concrete and it needs more incisive research before it applies to engineering construction.

show abstract

“…Ali et al [11] proposed that the compressive strength and flexural strength of geopolymer showed a tendency to increase and then decrease with the increase of combustion temperature, and reached the highest point at 400℃. Whereas, Payakaniti [12] found that the compressive strength of geopolymer reached its maximum after exposure to 200℃.…”

Section: Introductionmentioning

confidence: 99%

Study of Fly Ash-slag-based Geopolymer Mortar Exposed to High Temperature

王,

Zhang,

Niu

et al. 2024

Preprint

View full text Add to dashboard Cite

Purpose: To investigate the effectof the admixtures of graphene oxide (GO) and red mud (RM) on the properties of fly ash-slag-based geopolymer mortar respectively and explore the causes of changes in the strength of geopolymers after exposure to high temperature. Methods: The orthogonal method was utilized to derive the optimum mix ratios of geopolymer mortar without the addition of GO or RM. GO at 0.05% or RM at 40% was added to the mixing ratios to study their effects on the mechanical properties of the geopolymer mortar at temperatures ranging from 25 to 900 ℃, respectively. Results: The addition of GO or RM can reduce the strength loss of geopolymer after exposure to high temperature. Conclusion: (1) The addition of GO or RM can reduce the degree of cracking of geopolymer mortar after exposure to high temperature to some extent. (1) The final strength of the geopolymer is a combination of the degree of reaction and high temperature damage. (3) The degree of sintering reaction inside the mortar specimens was more fully developed and a higher concentration of feldspar-like material was produced compared to that at the edges, which caused the interior to be grayish-black.

show abstract

Properties of Geopolymer Mortar Subjected to High Temperature

Cited by 5 publications

References 13 publications

Effect of silica fume and waste rubber on the performance of slag‐based geopolymer mortars under high temperatures

Effect of silica fume and waste rubber on the performance of slag‐based geopolymer mortars under high temperatures

Latest Progress of Mechanical Properties of Geopolymer Concrete at Elevated Temperature

Study of Fly Ash-slag-based Geopolymer Mortar Exposed to High Temperature

Contact Info

Product

Resources

About