to: adjust setting time or hardening, reduce water demand, increase workability, intentionally entrain air, and adjust other concrete properties (Kosmatka and Panarese 1-2). After completion of proper proportioning, batching, mixing, placing, consolidating, finishing, and curing, hardened concrete becomes a strong, noncombustible, durable, abrasion-resistant, and practically impermeable building material that requires little or no maintenance. Concrete is also an excellent building material, because it can be formed into a wide variety of shapes, colors, and textures for use in almost unlimited number of applications. Works Cited ACement and concrete.@ The 1996 Grolier Multimedia Encyclopedia.
5 pages (1349 words)