离心混凝土电杆(下称电杆)在脱模后,外表面有较深暗纹路,宽度一般在0.15～2.5毫米。特别经蒸汽养护后,尤为明显,而在夏季又最突出。这种纹路没有裂口,并随电杆表面水份的蒸发而消失。对无裂口的水纹纹路的危害性。经过近十年的试验与观察,认为它也是电杆的一个不可忽视的质量问题,应于关注。一、混凝土强度比较(见表1) 由表1可见,水纹部位混凝土强度比正常部位低100公斤/厘米~2左右。说明水纹对电杆混凝土强度有影响。二、抗弯试验(见表2) 试验杆是选用生产工艺相同的同批产品。在抗弯试验中水纹部位 After the centrifugal concrete pole (hereinafter referred to as the pole) is demolded, the outer surface has a dark dark road, and the width is generally 0.15-2.5 mm. This is particularly evident after steaming, and it is the most prominent in the summer. There is no crack in this line and it disappears with evaporation of water on the pole surface. The harm to the water line without cracks. After nearly a decade of experimentation and observation, it is believed that it is also a non-negligible quality issue for electric poles and should be focused on. 1. Comparison of Concrete Strength (See Table 1) As can be seen from Table 1, the strength of the concrete in the water strake is 100 kg/cm~2 lower than that of the normal part. It shows that water marks have an effect on the strength of pole concrete. Second, the bending test (see Table 2) Test bar is the same production process using the same batch of products. In the flexural test watermarks