Abstract
The production and use of plastic bottles is increasing tremendously with passing time. These plastic bottles become a problem when they are disposed as they are non-biodegradable. This means that the waste plastic, when dumped, does not decompose naturally and stays in the environment affecting the ecological system. The use of alternative aggregates like Plastic Coarse Aggregate (PCA) is a natural step in solving part of reduction of natural aggregates as well as to solve the issue discussed above. The researchers are trying from half a century to investigate the alternative materials to be replaced in concrete mixture in place of either aggregate or cement. In this research, the concrete made from plastic waste as coarse aggregates were investigated for compressive strength and Stress-strain relationship. Plastic coarse aggregate have been replaced in place of natural coarse aggregate by different percentages with w/c 0.5, 0.4 and 0.3. The percentage replacement of plastic aggregate in place of mineral coarse aggregate was 25%, 30%, 35% and 40 %. Using Super-plasticizer Chemrite 520-BAS. OPC-53 grade cement was used. Total of forty five Cylinders were prepared based on different combination of Percentage of Plastic aggregate replaced and W/C as discussed above and checked for compressive strength and stress-strain relationship. The compressive strength increases by about 19.25% due to the decrease in W/C from 0.5 to 0.3 for plastic percentage addition of 40%.
Highlights
There is no doubt that plastic is a wonderful invention, if you look around you will find everything or has some amount of plastic or made entirely of plastic
Concrete mix preparation with plastic waste in the form of plastic aggregates in place of local material can be conducted in the same fashion as that of traditional concrete
Reduced slump values of plastic aggregate in concrete mixtures indicates that it can be used in circumstances that require low workability
Summary
There is no doubt that plastic is a wonderful invention, if you look around you will find everything or has some amount of plastic or made entirely of plastic. Marzouk et al substitute the fine particles of concrete mix with the PET bottles waste up to some extent and determine the effects produced from this replacement on the hardened concrete in the form of compressive strength and density. Results from his research showed that by increasing the plastic aggregate more than 20% the strength noticeably decreased and the workability of concrete was effected to a very small extent [8]. By replacing 20% of natural coarse aggregate in the concrete mix with plastic aggregate showed that the strength and other properties were in the permissible limit. In 2016, another research study reveals that due to the partially replaced recycled plastic aggregate with natural coarse aggregate, the concrete compressive strength was reduced between 40 and 53% as compared to the traditional coarse aggregate concrete [14]. This research has been planned to explore the compressive strength and stress strain relationship of concrete having higher percentages of plastic aggregate
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