论文部分内容阅读
一、简况陕西省红旗水泥制品厂生产的工字型预应力混凝土电杆的规格有8、10、12米,抗弯矩分别为0.7、2.5、3吨·米,年产量4万根。该品种电杆混凝土标号为450号,断丝强度为315公斤/厘米~2,采用振动法成型。在电杆生产中两次试用减水剂,第一次在1985年元月至2月上旬,第二次同年7月。两次试用的混凝土配合比见右表。结果如下:
I. Brief Introduction The I-shaped prestressed concrete pole produced by Hongqi Cement Products Factory in Shaanxi Province has specifications of 8, 10, and 12 meters, bending moments of 0.7, 2.5, and 3 tons per meter, and an annual output of 40,000 pieces. This type of pole concrete number is number 450, broken wire strength is 315 kg/cm~2, and it is formed by vibration method. Trial water reducers were tried twice in pole production, the first time in January 1985 to early February and the second time in July of the same year. The concrete mix ratios for the two trials are shown in the right table. The result is as follows: