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Title |
Experimental Study of Freezing Characteristics and Antifreezing Method of Liquid Additive for Early Strength
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Keywords |
액상형 혼화제 ; 조기강도 ; 동결온도 ; 겔화온도 ; 내동해성 liquid additive ; early strength ; freezing temperature ; gelling temperature ; antifreezing |
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Abstract |
In ready mixed concrete factory, in case of using the high molecular additive in winter especially the liquid additive for the early strength, it is required to check the stability. In this research, the freezing and gelling characteristics of the liquid additive for the early strength is reviewed, the material and mechanical solution are proposed to that the practical quality control method will be suggested. As the result, the Freezing temperature of the liquid additive for the early strength is -11.8?C, and it is the lower than the temperature at which the strength is shown. By making with sodium silicate of 37{±}0.5% designed by SiO2;and;Na2O in 0.31 of mol ratio, it minimizes the gelling at the lower temperature. On the other hand, facilities for storing and supplying the material should be set at 40?C so the temperature distribution is well spreaded for practical operation.
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