Honors College Theses

Publication Date



Civil Engineering (B.S.)

Document Type and Release Option

Thesis (open access)

Faculty Mentor

Dr. M. Myung Jeong


The purpose of this study is to explore the effect of recycled asphalt shingles (RAS) as an additive on the compressive strength of concrete. This was accomplished by designing a concrete mix and creating 4” by 8” cylindrical test specimens containing 0, 5, 10, and 15 percent RAS by weight. The compressive strength was measured through axial loading until failure utilizing a compression testing apparatus. With these results, a relationship between the content of RAS and compressive strength was able to be developed, giving insight as to how RAS could be used in concrete mixes in the future. This study will help further sustainability knowledge in the field of construction and could lead to the creation of a sustainable technique for recycling an otherwise wasted construction material.

Thesis Summary

This study seeks to understand how the addition of recycled asphalt shingles (RAS) to a concrete mixture affects the compressive strength, with the hopes of developing a recycling technique for the material. This was done through a series of compression tests, at different points in the curing process, on concrete mix designs with varying amounts of RAS addition. Ultimately, an inverse relationship was found between the addition of RAS and the strength of the cured concrete mix. However, it was established that RAS amended concrete can be utilized as a low strength concrete, making it viable for recycling in a number of different construction applications.