CHANGES IN SOME CHARACTERISTICS OF POLYSULPHIDE-BASED JOINT SEALANTS IN ACCELERATED AGING TESTS

Accelerated aging tests lasting 500 hours were conducted on 5 types of polysulphide-based joint sealants with a view to determining the effect of aging on their characteristics. This represents the first stage of a more general study of the behaviour of those sealants under natural conditions. The tests were carried out in a weatherometer atlas (double arc model). The mechanical properties of the products such as hardness, tensile strength, elongation at rupture and overall deformation energy were examined after each 100-hour period of exposure and compared with results obtained on samples kept in a controlled-air chamber. The samples used were different from normal samples prescribed by usas; the latter samples cannot be used in aging tests because of the dimensions of their large cement blocks and of the thickness of the joint sealant. A special sample was utilized so as to stress the damages due to exposure. Test results show marked differences between products of different makes before and after exposure. Some conclusions were derived regarding the performance of the products studied, and a comparative evaluation was made of their probable durability under atmospheric conditions, although no forecast as to their service life was possible at this stage. In order to predict the latter, it would be necessary to obtain correlations between results of accelerated aging tests and those of natural aging tests, which are being conducted at the present time. The aim of this study was to establish an accelerated aging coefficient in relation to local climatic conditions. /TRRL/

  • Corporate Authors:

    Springer Verlag

    175 5th Avenue
    New York, NY  USA  10010
  • Authors:
    • Lerchenthal, H
    • Rosenthal, I
  • Publication Date: 1972-9-16

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00099602
  • Record Type: Publication
  • Source Agency: Laboratoire Central des Ponts et Chausees (LCPC)
  • Files: ITRD, TRIS
  • Created Date: Nov 18 1975 12:00AM