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一、特点及适用范围热拌冷铺柏油混合料是将柏油、石料加热后拌成,它可以在拌制后立即到工地施工,亦可放置一个时期,冷却后不需加热即行铺筑。热拌冷铺柏油混合料分粗细两种,细料用作面层,粗料用作基层。 (甲)细料冷铺细料的特点是:1、用的柏油稠度很薄(7～9级),用量很少;2、石粉用量很多;3、拌好的混合料,在常温时应为松散状态,或结成很松的松块,可用洋铲拍散,但将拍散的混合料(小块粒状)重行集合捣固时,又复粘合成整块;4、良好的混合料应具有“活力”,这就是说,假若用手将混合料捏紧成块,则块能保持其固定形状,但用手指又可将其捏碎。
First, the characteristics and scope Hot asphalt mixing asphalt paving asphalt, stone heating mixture, it can be immediately after mixing the construction site, can also be placed for a period of cooling without paving the line. Hot mix asphalt pavement thickness of two, fine material for the surface, coarse material used as the grassroots. (A) The characteristics of fines cold paving fines are as follows: 1, The asphalt used is very thin (7 ~ 9 grades), the dosage is very little; 2, The amount of stone powder is much; 3, Mix well, Loose or loose pine, can be shovel scattered with the ocean shovel, but the pooled mixture (small granular) re-aggregate tamping, and then re-bonded into a block; 4, a good mix The material should have “vitality,” which means that if the mixture is pinched by hand, the block retains its shape, but with its fingers it can be crushed.