Development of adhesive test for hot-poured crack sealants

Sawalha, Mohammed Sa

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https://hdl.handle.net/2142/90692 Copy

Description

Title

Development of adhesive test for hot-poured crack sealants

Author(s)

Sawalha, Mohammed Sa

Issue Date

2016-04-29

Director of Research (if dissertation) or Advisor (if thesis)

Al-Qadi, Imad

Committee Member(s)

Ozer, Hasan

Department of Study

Civil & Environmental Eng

Discipline

Civil Engineering

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

M.S.

Degree Level

Thesis

Keyword(s)

• Adhesion
• Tensile adhesive method (TAM)
• Adhesive Tests
• Temperature Effect on Adhesion
• Aging Effect on Adhesion
• Adhesive Mechanisms

Abstract

Sealants may be defined as the flexible materials used in cracks and/or joints preventing moisture infiltration into the pavements. These materials should acquire certain adhesive and cohesive properties to remain intact in the cracks and/or joints. Hot-poured applied crack sealants are one of the most common preventive techniques in North America that extend pavement life. However, most of these applied sealants fail due to their poor adhesion to crack walls. Various tests are currently used to measure the sealants’ adhesive properties. Most of these tests apply a mechanical load (tensile, shear, bending, torsion, and peeling) or study the chemistry at the interfaces, especially the molecular and interatomic forces generated at the interfaces. These tests, however, either lack a real correlation with field performance or have not yet been validated. This study introduces the development of a procedure for an adhesive prediction test, tensile adhesive method (TAM). It also evaluates the feasibility of two other tests: the single end notch interface (SENI) test and sessile drop method (SDM). TAM test, which is a modified version of the current crack sealant adhesion tester (CSAT) test, shows consistent results among specimens and users. In addition, it was successful in capturing the effect of temperature changes and aging effects. It is concluded that good adhesive properties of hot-poured crack sealant are required for desired field performance, which can be predicted from lab-aged specimen test results. However, other factors affecting sealant performance should be considered, including sealant installation, stiffness, and other preventive maintenance applied to the pavement.

Graduation Semester

2016-05

Type of Resource

text

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http://hdl.handle.net/2142/90692

Copyright and License Information

Copyright 2016 Mohammed Sawalha

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