Doctoral Dissertations

Keywords and Phrases

Chip seal; crumb rubber; macrotexture; pavement maintenance; seal coat; sustainable material


"Chip seal is one of the most cost- and performance-effective pavement preservation treatments commonly used in the United States. Using crumb rubber obtained from scrap tires as a partial or full replacement for mineral aggregate has been proposed as a sustainable solution to reduce the negative environmental impacts of scrap tire accumulation and excessive consumption of natural resources. However, there was no data available regarding the performance of rubberized chip seal under traffic loads and environmental conditions. An extensive study using laboratory specimens and conditioning as well as field implementation and assessments were conducted to bridge this gap. Different traffic loading conditions in terms of the number of passing vehicles, travel speed, and vehicle weight; different environmental conditions such as high, intermediate, and low temperature; resistance to freeze-thaw, deicing chemicals, and snowplowing action; and drainage capability of rubberized and conventional chip seal was assessed and compared in this research. For this means innovative traffic and rainfall simulation devices were manufactured and used. A 3D macrotexture measurement technique was also developed for chip seal surfaces. The results indicated that up to 50% replacement of mineral aggregate with crumb rubber did not negatively affect the performance of chip seal in intermediate temperatures. However, increasing the rubber content improved the performance under higher speeds, heavier vehicles, snowplowing action, and elevated temperatures. Using crumb rubber will also help with better surface drainage. Rubberized chip seal is proven to be susceptible to freeze-thaw effects and did not perform as well as conventional chip seal in cold temperatures"-- Abstract, p. iv


ElGawady, Mohamed

Committee Member(s)

Abdelrahman, Magdy
Yan, Guirong Grace
Gheni, Ahmed
Okoronkwo, Monday Uchenna


Civil, Architectural and Environmental Engineering

Degree Name

Ph. D. in Civil Engineering


Missouri University of Science and Technology

Publication Date

Spring 2024


xix, 246 pages

Note about bibliography

Includes_bibliographical_references_(pages 48, 76, 106, 145, 181, 231 and 242-243)


© 2022 Alireza Pourhassan, All rights reserved

Document Type

Dissertation - Open Access

File Type




Thesis Number

T 12359