| 시멘트 유동성과 물성에 미치는 영향인자에 관한 연구 |
| 엄태선, 최상흘1 |
쌍용중앙연구소
1한양대학교 무기재료공학과 |
| A Study of Effecting Factor in the Reology and Physical Properties of Cements |
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| ABSTRACT |
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The reology and several physical properties of cements are studied by varying the different mineral composition and particle size distribution(PSD) of cements with closed circuit ball mill for high workability, low heat of hydration, and high strength. In this study, we found that the workability of concretes is related to the viscosity of cement, and affects to strength. Here, this workability is affected by mineral composition (C3A) and the PSD. Especially, rosin-rammer index and 44${mu}{textrm}{m}$ residue in the PSD of cements are affected to water demand, casting property, slump loss, strength of cements. From the above results, the conditions of cement for high workability, low heat of hydration and high strength are to use low C3A clinker, 5-10% slag addition, and to grind cement below 0.7 rosin-rammer index, above 3.5-4.5% 44 ${mu}{textrm}{m}$ residue, 4000$pm$100 $textrm{cm}^2$/g blaine. Such cements are, therefore, supurior to super low heat cement and slag-blended cement in comparing the physical properties of strength, slump, slump-flow, adiabetic temperature, etc. |
| Key words:
Reology, Physical properties, Mineral composition, Particle size distribution |
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