| Title |
IMPROVED MATERIALS AND PROCESSES FOR SEALING AND RESEALING JOINTS IN PORTLAND CEMENT CONCRETE PAVEMENTS--FIELD EVALUATION. FINAL REPORT
|
| Accession No |
00642376 |
| Authors |
Lynch, L N; White, D W; Chehovits, J |
Corp. Authors
/ Publisher |
Waterways Experiment Station  ; Crafco, Incorporated
|
| Publication Date |
19931000 |
| Description |
166 p.;
Appendices(4); Figures(73); Photos(4); References; Tables(12) |
| Languages |
English
|
| Abstract |
This report documents the field evaluation phase of the joint effort research program conducted by Crafco, Incorporated, and the U.S. Army Engineer Waterways Experiment Station. The project was funded under the auspices of the FY 89 Construction Productivity Advancement Research (CPAR) Program. The objectives of the research effort were to (a) develop specification limits for a hot-applied, jet-fuel-resistant (JFR) sealant with improved performance characteristics as compared to current Federal Specification (FS) SS-S-1614A type materials, (b) develop specification limits for a hot-applied, non-jet-fuel-resistant (non-JFR) sealant with improved low temperature performance characteristics as compared to current FS SS-S-1401C type materials, (c) develop specification limits for a primer system that will minimize the bubbling tendencies associated with hot-applied sealants and improve adhesion characteristics to portland cement concrete (PCC), and (d) develop field data to determine performance characteristics of flush fill sealant application geometry versus 1/8 to 1/4 in. recess application techniques. The objectives were expanded to include field comparisons of the laboratory developed JFR and non-JFR sealants versus commercially available sealant materials and to verify that the developed primer system minimized bubbling tendencies of hot-applied sealants. The field evaluation site selected for this project was Fairchild Air Force Base (AFB), Spokane, Washington. The 6 month and 1 year evaluations indicate that none of the sealants experienced any adhesive or cohesive failures except in areas that could be attributed to snow plow damage or areas of the joint face that were not completely clean when the sealant was installed. The hot-applied, asphalt-based materials had experienced a large amount of bubbling but the bubbling had not affected the sealants performamce. It is believed that the bubbling could affect the field performance of these materials within the next year. The cold-applied sealants, both single-component and two-component, appeared to be performing better than the hot-applied sealants. However, because of the brevity of the evaluation period, it is difficult to predict which material will perform the best. |
| TRT Terms |
Adhesion ; Bubbles ; Low temperature ; Pavement joints ; Performance ; Primers (Materials) ; Sealing compounds ; Specifications |
| Other Terms |
Application techniques; Bubbling; Cold-applied sealants; Field performance; Hot-applied sealants; Jet fuel resistant sealants; Non-jet fuel resistant sealants; Performance characteristics; Primers; Sealants |
| Subject Areas |
H34 GENERAL MATERIALS; I35 Miscellaneous Materials |
| Report Number |
Tech Rept CPAR-GL-93-2 |
| Availability |
National Technical Information Service |
| TRIS Files |
HRIS |
| Database |
TRIS Online |
TRT
