Shrinking and Swelling Properties of Chemically Cured Resin Mortars for Chemically Resistant Linings.

In the field of acid-proof construction chemically cured mortars, especially those based on phenolic, furan, epoxy or unsaturated polyester resins are used to apply linings on floors or in vessels. Sometimes these resin mortars are used as a troweling compound for monolithic floors, more often however as a bedding and pointing material for ceramic tiles or special shaped bricks. Because of the good adherence to the supporting construction to be protected, variations in dimension of the mortar as an effect of shrinkage or swelling cause stresses, which can exceed the strength of the linings and then could cause damage to the integrity of the installation. Methods for measuring the effective, i. e. , stress generating dimensional changes in resin mortars were investigated for a variety of conditions, and testing equipment for determining the stresses generated in these mortars are developed. The results are represented graphically. The evaluation is done with respect to the possible effects of the behavior of the mortars in installed brick linings and floor coverings.