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J. Korean Ceram. Soc. > Volume 29(4); 1992 > Article
Journal of the Korean Ceramic Society 1992;29(4): 298.
MDF 시멘트 복합재료의 휨강도와 수분민강성에 미치는 수용성 폴리머의 영향
김태현, 최상흘
한양대학교 무기재료공학과
The Effect of Water Soluble Polymer on the Flexural Strength and Moisture Sensitivity in MDF Cement Composites
ABSTRACT
Flexural strength, microstructure, hydration reaction and moisture sensitivity in macro defect-free (MDF) cement, which basically prepared of high alumina cement (HAC) and hydroxypropyl methylcellulose (HPMC) and polyvinylalcohol (PVA) as water soluble polymer were investigated. Cement composites based on HAC-PVA system were improved in flexural strength than that of HAC-HPMC system especially, the strength of specimens added to 10 wt% of polyvinylalcohol was 160 MPa. These improvements of flexural strength were attributed to not only the effect of water soluble polymer in elimination of macropores (above 100 $mutextrm{m}$) and cement grain bridging, but the effect of unhydrate cement as an aggregate. Moisture sensitivity and flexural strength in wet condition of MDF cement composites immersed in water at 80$^{circ}C$ for 3 days were decreased.
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