Effect of Polystyrene Waste on Concrete at Elevated Temperature

Abstract

Objectives:The purpose of the present study is to examine the thermal and impact behaviour of the concrete containing polystyrene waste as aggregates. Methods: The concrete specimens were cast and cured in a conventional way to examine the mechanical behaviour of the concrete. A separate equipment was prepared to determine the impact strength of the concrete as per ASTM D5420-21. The thermal behaviour of the concrete with plastic aggregates were also examined with reference to IS 7861-1 (1975). Artificial Neural Network was also used to predict and compare the properties between both the conventional and plastic concrete. Findings: The mechanical behaviour of the concrete behaves well at Mix 2 when compared to other mixes. The impact strength of the concrete was found to be 98.375 J at Mix3 which was 20.69% higher than the Mix2. At Mix2 the 7 days compression strength in elevated temperature is 16.79 N/mm 2 which was 4.8% higher than the Mix 1 and 31.74% higher than the Mix 3. At 28 days, the compressive strength of concrete containing 50% replacement of aggregate exposed to temperature 50 o c for 24 hours is 26.84 N/mm 2 which shows a better result and resistance in the thermal condition than the other mixes. ANN also gives reliable predicted values which exhibits a clear relation with the inclusion of the plastic aggregate and concrete matrix with some minimum errors. Novelty: From the experimental investigation it was observed that the plastic concrete fails in the transition zone of concrete due to the weaker bonding between the plastic aggregate and cement matrix. The plastic aggregate has not undergone any crushing failure in the concrete specimens when compared to the conventional aggregate. Thus, this solid polystyrene waste can be used as an alternative material for coarse aggregate in concrete.

Morphological, Optical and Voronoi Polygon Analysis of Breath Figures Prepared on Polymeric Surface

“…Morphological data are in tune with available literature with providing more detailed analysis and the present data shows better morphological variation with humidity for two different solvents. Close observation reveals that there is a difference in BF patterns mainly in droplet size distributions as https://www.indjst.org/ well as in the droplet morphology (6,9) . It is seen that concentration of the polymer in solution is significantly affecting droplet morphology.…”

“…Contact angle measurement has been found to be an indispensable technique for surface characterization and wettability study due to its simplicity (6) . The instrument used in this work was optical contact angle goniometer with image processing software (SCA20, data physics, Germany).…”

“…In this work a detailed quantitative analysis of Voronoi polygon analysis has been done for BFs produced. BFs of different having tuned dimension are utmost important and work has been carried out by several researchers on different polymers to obtain different tunable sizes of structures (6) . Researchers have explored the effects of variation of solvent for formation of BFs and have found direct evidence of it on formation of BFs with different size.…”

“…(9) . Contact angle and SEM images plays a very important role in studying the BFs and they provide help and data for several mathematical analysis studies (5,6) . The work presented in this paper deals with the study of condensation on the surface of volatile polymer solution and their uses for non-wetting surface using Voronoi polygon analysis and morphological studies.…”