Influences of the N.B.R. Latex on the Hydration of Gypsum Plaster

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J. Korean Ceram. Soc. > Volume 19(3); 1982 > Article

Journal of the Korean Ceramic Society 1982;19(3): 187.

N. B. R. Latex가 석고 플라스터의 수화에 미치는 영향

형경우, 이홍림, 김창은

연세대학교 공과대학

Influences of the N.B.R. Latex on the Hydration of Gypsum Plaster

ABSTRACT

N.B.R. latex was used as the admixture in order to improve the various properties of gypsum plaster which is widely used as the construction material. The influences of N.B.R. latex on the hydration of gypsum plaster were studied. The results obtained are summerized as follows; 1. The water/gypsum plaster ratio is decreased wth increasing amounts of surfactant (P.O.E. Nonyl Phenol Ether) as the additive. 2. It is the pore of large size (${gg}$7500A) that is mainly decreased with increasing amounts of surfactant. 3. With the small amount of surfactant as the additive, the hydration was slightly retarded, but was gradually recovered with increasing amounts of surfactant, and their heat of liberation after 20 hours were nearly same.