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沥青混凝土和贯入式碎石等黑色桥面铺装工程,均应在气温10℃以上进行。根据东北地区的一般气候情况,要在9月15日以前施工。否则,必须采取其他有效措施。如某桥的黑色贯入式碎石桥面,是在1954年10月中旬施工的。当时,日平均气温约为9℃左右,为了使柏油能很好的透入,所用石料均预先炒热,然后铺洒,这就大大的提高了造价。如气温在0℃以下时,黑色桥面铺装工程更不适宜进行,因为即使将石料加热,各种黑色路面也不能顺利碾压,何况在负温度时行车作用不能促使路面成形。辽宁地区10月下旬平均气温接近0℃,11月份的平均气温已在零下,而大中桥在这时竣工的不在少数,因此,在寒冷地区,如何使黑色桥面铺装能在冬季照常施工,就成为一个必须研究的课题了。
Asphalt concrete and black gravel pavement and other projects, should be carried out at temperatures above 10 ℃. According to the general situation of the Northeast climate, to be September 15 construction. Otherwise, we must take other effective measures. Such as a bridge of black penetrating gravel deck, in mid-October 1954 construction. At that time, the average daily temperature of about 9 ℃, in order to make the asphalt can be a good penetration, the use of stone are pre-heat, and then sprinkle, which greatly increased the cost. If the temperature is below 0 ℃, the black bridge deck pavement works more inappropriate, because even if the stone heating, a variety of black pavement can not be successfully rolled, not to mention the negative temperature when driving can not promote the formation of the road. In Liaoning, the average temperature in late October approached 0 ° C, and the average temperature in November was already below zero while the Dazhong Bridge was completed at this time. Therefore, in cold areas, how to make the black deck pavement work as usual in winter , It has become a subject that must be studied.