A Fundamental Study on the Effectiveness of Anti-freeze Agent Using Waste Coolant in Cold Weather Concreting

한중콘크리트에 있어서 폐부동액을 이용한 내한제의 효율성에 관한 기초적 연구

In this paper, tests are carried out in order to investigate the validities of anti-freeze agent, which is developed using waste coolant and existing anti-freeze agent through previous study, under various W/C and contents. According to test results, adequate dosage of developed anti-freeze agent shows positive performance in slump, air content and chloride contents in the mixture of 40% and 50% of W/C, accelerates setting time and drops the freezing temperature of concrete. Meanwhile, in the region of 30% of W/C, followings can be indicated that increasing the contents of anti-freeze agent leads to reduce fluidity, rapid setting and excessive chloride contents. Improved strength gain is shown when anti-freeze agent is used with in 8%.