Study on preventing efflorescence to improve beauty of concrete.

Appearence has become an essential issue in concrete engineering these days. The esthetic of concrete is affected by its design, color, surface finish and surface cracking. The purpose of this study is to test and analyze the factors causing efflorescence on concrete surface in order to prevent efflorescence to improve beauty of concrete. Experiments were carried out using model specimens 10×10×20 cm in size with different curing conditions and internal factors. The resulting data were analyzed to find the relation between such factors as coefficient of moisture and the ratio of efflorescence-affected area. The most influential factor was found to be the coefficient of moisture， followed by the water-cement ratio