混凝土冬季施工质量预控

针对北方地区混凝土冬季施工特点，对冬期施工中混凝土质量的合格性判定与常温的不同之处加以阐述。分析研究了冬期施工时砼质量的几种合格性评定的方法，结果表明，即使水灰比和水泥用量符合要求，砼如果受了冻，耐久性也要受到损害，单纯依靠同条件试件的强度是不能进行砼的合格性评定的。

Concrete quality precontrol of winter construction

In view of characteristics of concrete winter construction in the north district, the paper elaborates the difference of qualified judgement of concrete quality in winter construction and ordinary temperature, analyses and studies some methods of qualified judgement of concrete quality in winter construction. The result indicates that even if water-cement ratio and cement quatity should meet demands, if concrete goes cold, endurance is also injured. Simply depending on strength of test pieces in the same condition, qualified judgement of concrete can't be carried out.