Flexible Polymer-Cement Based Repair Materials and Their Applications

摘要

Portland cement-based concrete and mortar are two of the most widely used construction materials. The low cost, high stiffness, high compressive strength, nonflammability, and ease of fabrication are the most obvious advantages of concrete. The low tensile strength; brittle nature; and, to some extent, long-term durability of concrete represent its most serious limitations. Reinforcing concrete with steel provides the necessary tensile strength, and the incorporation of fibers increases the toughness (resistance to crack propagation) of concrete. The polymer modification of cement paste greatly increases the tensile and flexural strengths and reduces the brittle nature (increases toughness) of mortars and concrete.