公路表面敷设层用非蒸压泡沫混凝土

Iryna Hornikovska, V. Kahanov
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摘要

本文讨论了各种地基非刚性道路路基结构防冻层和隔热防冻层参数的计算估算与冻结有关的问题。研究了密度等级为600 ~ 1000kg /m3的聚丙烯纤维增强整体分散无蒸压泡沫混凝土的主要物理、技术和变形特性。直接在路面下的地下水冻结,其结果是其体积的增加,导致路面的显著变形。在这种情况下,道路路面的无缺陷运行周期大大缩短,这反过来又导致需要以更密集的方式进行维修。降低道路运输基础设施的运营成本和维护成本的途径之一是在设计和施工实践中引入新的路面修整结构理念,以保证在规范运营期内路面的高质量。这可以通过在路面结构中引入一种有效的隔热材料作为防冻层来实现,以消除非刚性路面路面的升霜影响。由于国内外在道路施工中冻融的经验已经证明了在路面敷料施工中使用隔热材料的有效性,近年来在乌克兰,人们对使用非蒸压泡沫混凝土作为一种现代高效隔热材料用于道路施工的兴趣越来越大。由非蒸压泡沫混凝土制成的隔热层的安装使我们能够完全或部分地防止表面敷料基的冻结或过热,减少环境温度周期性变化的影响,从而增加路面结构的耐久性。该出版物提出了用于确定隔热防冻重过程(层)的路面敷料(基于砂,壤土砂,粘土和壤土)的最佳厚度的模态图,在乌克兰所有气候和地理区域的街道和道路网络完成。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Non-autoclaved foam concrete for layers of highways surface dressing
The article is devoted to the problems associated freeze with the calculated estimation of the parameters of the structural and heat-insulating antifreeze layer in the subgrade of non-rigid roads on various soil bases. The main physical, technical and deformation characteristics of monolithic dispersed non-autoclaved foam concrete reinforced with polypropylene fiber of grades of density from 600 to 1000 kg/m3 are investigated. Freezing of subsoil waters directly under the roadway pavement and, as a result, its increase in volume, leads to significant deformations of the road surface. Under such conditions, the period of defectfree operation of the roadway pavement is significantly reduced, which in turn leads to the need to repair it in a more intensive mode. One of the ways to reduce the operating cost and maintenance costs of the road transport infrastructure is to introduce into the design and construction practice new structural concepts for road surface dressing that ensure high quality pavement during the normative operational period. This can be achieved by introducing an effective heat-insulating material into the pavement structure as an anti-frost layer in order to elimi-nate the effect of frost lift of the roadway pavement of non-rigid roads. Since domestic and foreign experience freeze in the road construction has proven the effectiveness of the use of heatinsulating materials in the road surface dressing construction, in recent years in Ukraine there has been increased interest in the use of non-autoclaved foam concrete as a modern and highly effective heat-insulating material in road construction. The installation of a heat-insulating layer made of non-autoclaved foam concrete allows us to completely or partially prevent freezing or overheating of the surface dressing base, reduce the influence of periodic variations in environmental temperature, which in turn will increase the durability of the pavement structure. The publication presents nomograms for determining the optimal thickness of the heat-insulating anti-frost heavy course (layer) of road surface dressing (based on sand, loamy sand, clay and loam) done at the street and road network for all climatic and geographical regions of Ukraine.
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