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石油沥青加滑石粉后形成的胶结材料,在粘结力方面比纯石油沥青高6～7倍。纯石油沥青抗滑力为0.74公斤/厘米~2,而加入滑石粉后增强10多倍,见右表。 10号石油沥青加滑石粉后,在柔韧性方面也有明显的增强。如纯10号石油沥青试件厚度为2毫米,圆棒直径为φ12,温度18℃,弯成180°时开裂。加入滑石粉后,同样试件,同样
The cementitious material formed after adding petroleum tar and talcum powder is 6 to 7 times higher than pure petroleum asphalt in terms of adhesion. Pure petroleum bitumen has anti-sliding force of 0.74 kg/cm~2, and it is enhanced by more than 10 times after adding talc, see the table to the right. After the addition of talcum powder on the 10th bitumen, there is also a marked increase in flexibility. For example, the thickness of a pure 10th petroleum bitumen specimen is 2 mm, the diameter of round rod is φ12, the temperature is 18°C, and cracking occurs when it is bent at 180°. After adding talcum powder, same sample, same