Residual Strength Characteristics of Polymer Fibre Concrete Exposed to Elevated Temperature

Abstract

Abstract. Mechanical properties of polymer based concrete exposed to high temperature effects are evaluated in the present study. Concrete mixtures were prepared using styrene butadiene rubber (SBR) latex and reinforced with polypropylene (PP) fibres. "Latex polymer modified concrete mixes consisting of different aggregate proportions, polymeric fibre contents (0.1 and 0.3% Vf) and fly ash contents (25 and 50%) were investigated for high temperature performance. Concrete specimens after required curing were subjected to different high temperature effects from 200°C to 800°C and the corresponding weight loss and residual strength was determined. In addition, the residual elastic modulus of polymer concretes was determined from the compressive stress-strain properties. Experimental observations showed that, compared to plain concrete the residual strength characteristics of polymer fibre concretes were affected when exposed to high temperature. Strength degradation occurred with increase in temperature and the test results indicated that the temperature sustainability of polypropylene fibre concretes were observed up to 200°C. A maximum compressive strength loss upto 56.75% for plain concrete and 9.87% for polymer fibre concrete was noticed when exposed to high temperature upto 800°C. Further, microscopic analysis of fibre concretes exposed to high temperature showed possible melting of PP fibres resulting in filling the pore spaces which possibly improved the matrix hardening. Also, the high volume fibre incorporated concrete mixes showed maximum residual strength gain due to favourable matrix strengthening and demonstrated high temperature performance of polymer concretes.

Environmental Benefits of the Integrated Alternative Technologies of the Portland Cement Production: A Case Study in Thailand

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Mechanical properties of macro synthetic fiber reinforced concrete at elevated temperatures: A systematic review and meta‐analysis

“…Studying the extracted results, it was observed that there were no outliers but also a very poor fit due to a wide dispersion of the results. While the Thirumurugan 30 results were not classified as outliers during the linear regression for elastic modulus, the fact that they were excluded for compressive strength and their extremely high results for elastic modulus compared to the rest led to their exclusion when determining the proposed relationship. With those results included the R 2 = 0.417, whereas when they, as well as one low result from Rambo 41 (which becomes an outlier once the other results are removed), are excluded the adjusted R 2 increases to 0.888.…”

Experimental Study on the Effect of Basalt Fiber and Sodium Alginate in Polymer Concrete Exposed to Elevated Temperature

“…The properties of the mix design parameters have a significant effect on the performance of concrete exposed to elevated temperature [8][9][10][11]. Several research studies have been carried out to improve the thermal stability of concrete exposed to elevated temperatures using various materials, such as fillers, nanoparticles, and fibers [12][13][14][15].…”

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