1. Home
  2. TRID
  3. View Record
https://nap.nationalacademies.org/catalog/27432/critical-issues-in-transportation-for-2024-and-beyond

IMPROVED MATERIALS AND PROCESSES FOR SEALING AND RESEALING JOINTS IN PORTLAND CEMENT CONCRETE PAVEMENTS: LABORATORY STUDY. FINAL REPORT

A joint effort research program between Crafco Incorporated and the U.S. Army Engineer Waterways Experiment Station was conducted under the auspices of the FY 89 Construction Productivity Advancement Research Program. The purpose was to develop improved materials and processes for sealing and resealing joints in portland cement concrete pavements. This report summarizes the laboratory investigation phases of the research program. Testing was performed to identify the level of laboratory performance of currently available hot-applied, jet-fuel-resistant (JFR), and non-JFR sealants. Thirteen different sealants from four manufacturers were tested for specification conformance to FS SS-S-1614A and FS SS-S-1401C. Testing verified that the JFR sealants tested were not capable of passing bond tests at -20 deg F, and that they experience significant amounts of surface hardening when subjected to 158 deg F oven aging. Non-JFR sealants tested varied in low temperature extension capabilities. Products which met low-modulus ASTM D 3405 specifications were capable of passing bond testing at -20 deg F using 200% extension, while the FS SS-S-1410C materials could not. Laboratory development work determined that it was possible to produce hot-applied, JFR sealant materials which could pass bond testing at -20 deg F, and with less surface hardening after aging. A suggested specification was developed for this improved material, and a pilot production batch of sealant meeting this specification was made. Additionally, a suggested specification for a low-modulus non-JFR sealant with improved low temperature properties was developed, and a pilot production batch of sealant meeting this specification was made. Bubbling characteristics of sealants were studied. Data indicate that as little as 0.5% moisture in portland cement concrete (PCC) can cause sealant bubbling. A quantitative method to monitor bubbling rate was developed. A variety of potential encapsulating primer formulations were studied. Results indicated that when the appropriate primer system is used on PCC, swelling and bubbling of sealants can be reduced. Appropriate adhesion could not be obtained between the sealant and PCC pavement when the developmental JFR primers were used. The developmental non-JFR primers increased sealant adhesion and reduced sealant bubbling in the laboratory. A suggested specification for primer for use with non-JFR sealant for PCC pavements was developed.

  • Corporate Authors:

    U.S. Army Waterways Experiment Station

    Geotechnical Laboratory, 3909 Halls Ferry Road
    Vicksburg, MS  United States  39180-6199
  • Authors:
    • Lynch, L N
    • White, D W
    • Chehovits, J
  • Publication Date: 1993-5

Language

  • English

Media Info

  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 202 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00637783
  • Record Type: Publication
  • Report/Paper Numbers: CPAR-GL-93-1
  • Files: TRIS
  • Created Date: Oct 12 1993 12:00AM