【摘要】 研究了不同养护工艺对新疆地区冬季室外自然变负温下混凝土早期抗冻性及耐久性的影响。结果表明,室外自然变负温下(平均气温达到-15℃),添加复合抗冻剂的混凝土强度可保持稳定增长,同龄期下强度远高于未加复合抗冻剂的空白试件,并且随着龄期延长此优势更加明显,强度保留率明显提高。受冻前覆膜养护对提高早期抗冻性效果良好,覆膜养护有利于局部环境的温度及湿度保持恒定。更多还原

【Abstract】 The effects of different curing techniques on the early frost resistance and durability of concrete in winter in Xinjiang were studied. The results show that the strength of concrete with composite anti-freezing agent can keep stable growth under outdoor natural negative temperature(average temperature-15℃), and the strength of concrete with composite anti-freezing agent at the same age is much higher than that of blank specimens without composite anti-freezing agent, and with the extension of age, this advantage is more obvious, and the strength retention rate is obviously improved. Film curing has a good effect on improving the early frost resistance, film mulching maintenance is beneficial to keep the temperature and humidity of the local environment constant.更多还原