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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 |
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| ABSTRACT |
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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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