CONTROLLED CHANGES IN THE PROPERTIES OF CONCRETE AND REINFORCED CONCRETE BY MEANS OF POLYMERS

摘要

Soviet institutes involved in advancing structural sciences have developed plastic cements and concretes, capable of overcoming the limitations of conventional concretes. Modern construction needs materials for its more diversified and larger structures that are strong, flexible, impact- and abrasion-resistant, chemically stable, and not susceptible to cracking or surface deterioration. By changing the composition and quantity of components, plastic-concretes can be designed to meet specific needs. Soviet research has studied many plastic additives and admixtures for binders and concretes, as well as polymer coatings, laminated structures, and synthetic glues. Polymer concretes from furfural acetate monomers, hardened by benzenesulfonic acid, were studied the most and are now in use for underground, mining, municipal, industrial, and transport construction. Problems in their use, which need resolving to reduce variations in results and costs, and research conducted in this direction are discussed. Future research should include improved composition from both technology and cost standpoints; capability to control pro¬perties to suit needs; technology of designing and manufacturing structures, shapes, and components from the new materials; and redirection of the construction industry toward their use.