沥青路面就地热再生技术应用研究

沥青路面就地热再生技术就是将旧沥青路面经过表面加热、翻松铣刨,并掺入一定比例的新骨料、新沥青、再生剂等,利用移动式的就地拌和设备进行加热拌和,将热再生混合料铺筑成为新的沥青路面面层的一种再生技术。沥青路面就地热再生可100%利用旧路面沥青混合料,是一种经济、环保、可靠的沥青路面养护维修技术,具有广阔的推广应用前景。本文详细介绍了沥青路面就地热再生在开阳高速公路维修中的应用情况,包括方案设计、配合比设计及施工工艺等。     

沥青混合料添加温拌剂的应用分析

本文为对温拌沥青混合料(Warm Mix Asphalt简称WMA)与热拌沥青混合料(Hot Mix Asphalt简称HMA)的主要路用性能进行对比,基于ZQ-WB3型温拌剂在G220牡丹区段的实际施工生产中的应用情况进行了技术分析。结论表明,使用温拌剂可以在不降低沥青混合料性能的情况下达到到温拌温铺的目的,并更具经济性和环保价值。     

SMA目标配合比设计

本文介绍了SMA混合料的组成特点、材料要求,通过马歇尔试验进行了SMA目标配合比设计,确定了SMA混合料的最佳级配、最佳沥青用量,检验了路用性能。     

微表处在处治惠河高速公路车病害中的应用

微表处在我国公路沥青路面预防性养护方面是一种新工艺、新技术。文章以广东惠河高速公路沥青路面微表处在沥青路面车辙处治方面的施工实践，介绍微表处配合比的试验经验及施工的主要技术要点，供公路沥青路面预防性养护施工参考。     

就地热再生技术在国道102线上的应用

以国道102线为例,详细介绍了就地热再生的室内试验设计及现场施工过程。热再生技术的经济、社会及环保意义十分明显,对创建节能减排及环保型社会也具有十分重大的意义。     

On the dependence of acoustic performance on pavement characteristics

Acoustic-based mix design is still far from achieving a clear and accepted rationale. The three main dominions (generation, absorption, propagation) which affect pavement acoustic performance involve a number of acoustic parameters. Their relationship with pavement properties is scarcely or insufficiently known. In more detail, the parameters that define the acoustic coupling between the two phases that comprise a porous material are: porosity, resistivity, tortuosity, and viscous and thermal factors. Consequently, the spectrum of a pavement absorption coefficient depends, in particular, on tortuosity, whose relationship with HMA (hot mix asphalt) bulk properties is still an issue.Given that, the study described in this paper aimed at: (i) assessing the effect of the tortuosity on the absorption coefficient of a pavement layer; (ii) assessing the dependence of tortuosity on mix design parameters and/or mix properties; (iii) deriving a straightforward algorithm to estimate the effect of tortuosity-related properties on the absorption coefficient.Based on the above issues, an experimental plan was designed and carried out in order to study these relationships and set out a tentative theoretical and practical framework. The relationships between acoustic and traditional bulk properties of pavement mixtures were analysed. Acoustic models and hydraulic analogies were considered and, based on them, relationships were formalised and submitted to experimental validations. A simple relationship to derive tortuosity from nominal maximum aggregate size and thickness was derived. This relationship was used to derive the frequency of the first peak of the absorption spectrum, based on HMA properties. Nominal maximum aggregate size and lift thickness emerged as key factors in patterning peak frequency.Future research will address a number of issues among which the following can be listed: synergetic assessment of the influence of HMA properties on the absorption coefficient over the entire spectrum, synergetic consideration of generation and absorption factors. Practical benefits and outcomes are expected for both practitioners and researchers.     

温拌橡胶沥青混合料试验研究

针对目前温拌橡胶沥青混合料研究的匮乏,研究采用Sasobit温拌改性剂和橡胶沥青制备沥青试样,通过测试得到不同Sasobit掺量橡胶沥青的粘温曲线,确定了Sasobit的合理掺量以及温拌橡胶沥青混合料室内拌和与击实温度的推荐范围,并通过试验验证了Sasobit温拌橡胶沥青的降温效果与路用性能。试验结果表明：向橡胶沥青中掺加Sasobit温拌剂可以降低其粘度,从而降低了混合料室内拌和与击实温度;掺加3%（沥青质量%）Sa-sobit温拌剂的橡胶沥青混合料拌和与击实温度降低了约18℃左右;Sasobit温拌沥青混合料的高温性能优良,低温性能与水稳定性均有所降低,但降低幅度不大。     

SMA目标配合比设计

本文介绍了SMA混合料的组成特点、材料要求,通过马歇尔试验进行了SMA目标配合比设计,确定了SMA混合料的最佳级配、最佳沥青用量,检验了路用性能。     

泡沫沥青厂拌冷再生混合料设计及施工探讨

泡沫沥青厂拌冷再生技术具有经济、环保、施工方便等优点,在沥青路面养护维修工程中具有广阔的应用前景。依托江苏328国道路面大修工程,研究泡沫沥青厂拌冷再生混合料设计及施工关键技术。分析了泡沫沥青厂拌冷再生混合料强度形成机理,在此基础上结合实际工程研究提出了泡沫沥青厂拌冷再生混合料技术标准及设计方法,总结了冷再生混合料施工成套技术及质量控制方法,并分析了施工中路面微裂缝成因,为类似工程提供参考依据。     

厂拌冷再生技术在高速公路基层的应用研究

厂拌冷再生技术具有广阔的应用前景,本文阐述了利用改性乳化沥青和泡沫沥青作为主要稳定剂的冷再生混合料配合比设计;在室内实验的基础上对冷再生柔性基层进行了结构设计;结合高速公路的试验路工程总结了厂拌冷再生混合料的拌和、摊铺及碾压工艺。