ISSN:
1570-1468
Source:
Springer Online Journal Archives 1860-2000
Topics:
Energy, Environment Protection, Nuclear Power Engineering
Notes:
Conclusions 1. Our investigations have revealed the feasibility of using epoxy resins as a cementing material for plastic-concrete, glues, and paints at subzero temperatures; this is of interest for hydraulic engineering structures and the like, constructed in Siberia and the Far North. 2. The structural strength of compounds hardening at −20°C decreases by a factor of 5–10 and the adhesion strength by a factor of 3, with a tendency to display a subsequent increase. 3. The use of solvents greatly reduces the strength, the adhesion strength is less markedly reduced. At −20°C solvents preserve the composition but the cohesive strength is zero, whereas the adhesive strength has a specific value; after 60 days the decrease is not more than double the value observed in the absence of a solvent. 4. A marked increase in the strength of the materialis observed in going from a negative to a positive temperatures; this is of particular importance for the use of epoxy compositions in construction work, including hydraulic engineering structures. 5. The use of triethanolamine and DÉG-1 resin has a very beneficial effect on the increase in compression strength, but a similar effect is not observed in tensile tests. 6. The indices of the degree of polymerization did not display characteristic features accompanying the structural strength of the compounds.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02378019
Permalink
