| 摘要 |
PURPOSE: A VES-LMC(Very Early Strength-Latex Modified Concrete) composition is provided to minimize influence according to an outdoor air temperature change, to prevent icing, and to improve a compressive strength by using hauyne-based ultra rapid hardening cement including carbon black and ferric oxide. CONSTITUTION: A VES-LMC(Very Early Strength-Latex Modified Concrete) composition comprises hauyne-based ultra rapid hardening cement, polymer solid, coares aggregate, fine aggregate, and water. The hauyne-based ultra rapid hardening cement includes carbon black or ferric oxide in a form of a powder or a granule. The VES-LMC composition comprises 14.5 to 17.5 wt% of the hauyne-based ultra rapid hardening cement, 1 to 4 wt% of the polymer solid, 25 to 45 wt% of the coares aggregate, 30 to 50 wt% of the fine aggregate, and 5 to 7 wt% of water. The hauyne-based ultra rapid hardening cement includes 25 to 45 wt% of hauyne-based clinker, 35 to 55 wt% of Portland cement, 1 to 15 wt% of gypsum, 1 to 15 wt% of limestone, 0.01 to 1 wt% of tartaric acid retarder, 1 to 5 wt% of carbon black, and 0.1 to 2 wt% of ferric oxide. A mixing ratio(w/w) of the carbon black and the ferric oxide is 7:3 to 9:1.
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