What does this research mean for the field?

Plaster mortar coatings produced with various binders effectively limit thermal damage to interior concrete, providing up to 18.1% higher residual compressive strength at 700 °C compared to unplastered concrete. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

Investigate the mechanical, physical, and microstructural performance of cement- and slag-based plaster mortars protecting interior concrete against elevated temperatures up to 700 °C.

August 31, 2026PolymersOpen Access

Mechanical and Microstructural Performance of Different Plaster Mortars Used to Protect Interior Concrete Exposed to Elevated Temperatures

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Authors

İTİbrahim TürkmenInonu University MGMuhammed Şamil Gürkan EEE. Eki̇nci̇Inonu University

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Implication

Experimental study demonstrates protective plaster mortars enhance residual compressive strength in concrete under extreme heat, indicating improved structural fire resistance.

Key Points

Investigate the mechanical, physical, and microstructural performance of cement- and slag-based plaster mortars protecting interior concrete against elevated temperatures up to 700 °C.
Exposed mortar specimens and mortar-coated interior concrete to temperatures of 100, 300, 500, and 700 °C.
Evaluated cement-based, calcium aluminate cement, and ground granulated blast furnace slag (GGBFS)-based geopolymer mortars alongside unplastered controls.
Measured compressive strength, ultrasonic pulse velocity (UPV), water absorption, mass loss, and bulk density alongside microstructural degradation.
Plastered concrete specimens retained 9.8–13.3% higher residual compressive strength at 500 °C and 10.4–18.1% higher at 700 °C compared to unplastered controls.
Portland cement-based plaster yielded the greatest compressive strength retention (18.1% improvement) at 700 °C, while the G-Na system reduced water absorption by 19.5% relative to control concrete.
Temperatures of 300 °C and above caused substantial performance losses across all binders, with a strong correlation (R² ≈ 0.89) established between UPV and compressive strength.

Cite This Study

Türkmen et al. (2026) studied this question.

synapsesocial.com/papers/6a954263f20e493292a748e2 https://doi.org/10.3390/polym18172105

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Implication

Experimental study demonstrates protective plaster mortars enhance residual compressive strength in concrete under extreme heat, indicating improved structural fire resistance.

Mechanical and Microstructural Performance of Different Plaster Mortars Used to Protect Interior Concrete Exposed to Elevated Temperatures

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Implication

Key Points

Cite This Study

Mechanical and Microstructural Performance of Different Plaster Mortars Used to Protect Interior Concrete Exposed to Elevated Temperatures

Discussion

Member takes

Implication

Key Points

Cite This Study

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