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河北省在无砂石地区修筑路面,广泛的采用着石灰加固土底层,因为它具有经济、坚固、水稳性强的特点。为了克服灰土层具有不耐磨耗的缺点,我省已在灰土层上直接加铺双层沥青表面处治,实际使用效果是良好的。在灰土上直接铺筑多蜡重油表面处治,一开始我们尚无经验,曾提出了一系列的问题,如处治层与灰土层能不能很好地结合,多蜡重油能不能透入灰土,处治层对灰土层有那些技术要求,对结合料和矿料应有那些技术要求,用油量多少适当,以及初期养护应注意那些问题等等。通过今年施工实践有以下初步体会:
Hebei Province paved roads in the area without sandstone and extensively used limestone to reinforce the soil bottom because of its economy, sturdiness and strong water stability. In order to overcome the shortcomings of the soils with impatience and abrasion, our province has directly applied the double-layer asphalt surface treatment on the lime-soil layer, and the actual use effect is good. The direct application of multi-wax heavy oil surface treatment on lime-soil, from the beginning we have no experience, has raised a series of questions, such as the governing layer and the lime soil layer can not be well integrated, waxy heavy oil can penetrate the lime soil, treatment Layers on the soil layer that have those technical requirements, the binder and mineral materials should have those technical requirements, the amount of oil appropriate, and the initial conservation should pay attention to those issues and so on. Through this year’s construction practice has the following preliminary experience: