陕西关中地区(西安市周围)处于南、北分界线的秦岭山脉北麓,按冬季三个月计,最冷二个月的月平均温度都是在0。a左右。关中地区冬季气温特点是:白天正温,晚上负温,每天还有1/3左右时间在0℃以上。因此,如何充分利用这一段正温时间,再加上热水拌制和外加早强复合减水剂, Shaanxi Guanzhong Region (around Xi’an City) is located in the north of the Qinling Mountains on the boundary between the North and South. According to the three months of winter, the monthly mean temperature in the coldest two months is zero. a or so. The winter temperature in the Guanzhong region is characterized by a positive temperature during the day and a negative temperature at night. There are still approximately 1/3 of the day’s temperature above 0°C. Therefore, how to make full use of this period of positive temperature, coupled with hot water mixing and additional early strength composite water-reducing agent,