Microstructural characterization and mechanical properties of lightweight polymer concrete exposed to elevated temperatures

Ataabadi, Hossein Sanaei; Sedaghatdoost, Arash; Rahmani, Hamid; Zare, Abdolreza

doi:10.1016/j.conbuildmat.2021.125293

Cited by 13 publications

(1 citation statement)

References 49 publications

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“…However, elements composed of steel and cast iron do not meet the latest requirements, as they exhibit low vibration resistance and cannot maintain dimensional stability for a long time [1]. Thus, new materials, that is, composite materials [2][3][4][5][6][7], are a promising alternative. It has been established that manufacturing a bed from polymer concrete increases vibration resistance by 1.4 times.…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Strength Fatigue Properties and Abrasive Wear Resistance for a New Composition of Polymer Concrete Coated with Metal Alloy Powders

et al. 2023

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The possibility of using powder spraying to improve the strength properties of polymer concrete products has been studied. Different compositions of polymer concrete mixtures have been compared and analyzed in order to find out the adhesive and cohesive properties of coatings. An analysis of the stress-strain state under static loads has been carried out. To improve the tribological properties and wear resistance of critical parts of metal-cutting machine tools, such as beds, it is proposed to spray polymer concrete surfaces using the gas-thermal method. Two types of powder mixtures for spraying have been compared, and the adhesive properties of the analyzed coatings have been considered. The finite element method was used for the calculation of the abrasion resistance of polymer concrete models according to the proposed modification of Ni-7Cr-3Fe + 60% WC coating composition, which showed that the use of gas-thermal coating for polymer concrete is justified. Based on a simulation of adhesive peeling strength, it can be concluded that the wear coefficient of the coated sample is quite large. Under the impact of amplitude loads applied during 5 × 106 loading cycles with a high degree of wear equal to 1.5, the sample showed high safety margins equal to 0.67. The presence of a sprayed layer prevents the concentration of internal stresses in the area of polymer concrete, taking over the resulting stresses under an external force caused by the mechanical properties of the materials, thereby increasing the service life of a manufactured part.

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