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Can Recyclable Plastics Make Asphalt Stronger?

CSEF · 2003 Applied Mechanics/ Structures & Mechanisms/ Manufacturing

Rachel G. Robertson · Chinese Christian School, San Leandro

Overview

Objectives/Goals The purpose of this experiment was to study whether combining household Recyclable Plastics #1-7 as an additive in asphalt would improve the strength of asphalt. Methods/Materials Two experiments were performed to test this: a tension test to determine its plasticity and strength and a torsion test to determine its ability to withstand rotational strain. Results The tension test showed that the addition of plastic to asphalt usually results in a significant reduction in its plasticity. At the same time, there is a significant increase in the overall strength or resistance to deformation of the plastic- asphalt mix when compared to plain asphalt. The torsion test revealed that while the addition of most plastics results in reduced ability to withstand rotational strain, plastic #1 showed a significant increase in the that ability. Conclusions/Discussion According to my findings in the tension test, I conclude that asphalt is stronger by mixing Plastic #4 or Plastic #5 with it. Mixing Plastics # 1,2,4, and #6 with asphalt does not make the asphalt stronger.I can however conclude that a that the above asphalt plastic mixture cited will make a stronger, more flexible road. The benefits of a stronger asphalt would be most useful in a hot region.The addition of Plastic #1 (Polyethylene terephthalate) actually results in a significant increase in that ability

Summary statement

The purpose of this experiment was to study whether combining household Recyclable Plastics #1-7 as an additive in asphalt would improve the strength of asphalt.

Help received

Professor Carl Monismith helped by providing asphalt materials and equipment. Chinese Christian Schools provided both the facilities and the equipment for some experimental work. My Dad and Mom, Don and Krista Robertson helped with their ideas, stimulating discussions, and time devoted to the

Competition history

  • CSEF 2003 Applied Mechanics/ Structures & Mechanisms/ Manufacturing · Entry S0216

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