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首页> 外文期刊>Journal of the South African Institution of Civil Engineers >The performance of unpaved road material using soil stabilisers
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The performance of unpaved road material using soil stabilisers

机译：使用土壤稳定剂的未铺路面材料的性能

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摘要

There are over 500 000 km of unsealed roads in South Africa. Unacceptable levels of dust, poor riding quality and impassability in wet weather are experienced on much of this road network. A potential solution to this ever-increasing problem is the use of soil stabilisers (additives), yet the level of research done on these additives consists mostly of small ad hoc studies. The aim of this paper is to report on the performance of selected soil stabilisers used on South African unpaved roads with respect to their effect on material strength. The behaviour of the soil stabilisers were tested by determining the effectiveness of the stabilisers in improving the strength of unpaved roads as a function of gravel with different properties for a range of soil stabilisers under wet and dry conditions. The effectiveness was tested over a period of nine months. Four different stabilisers were used on four different wearfng-course materials. The conclusion reached was that there are certain stabilisers that do improve the strength behaviour of pavement material under certain conditions. It was found that the enzyme and sulphonated oil-treated materials had an increase in strength over the test period, and it was concluded that these stabilisers need a curing time of a few dry months to reach their maximum strength. The materials treated with the two polymers gained their maximum strength within two months after construction. It was found that the enzyme-treated material showed an increase in strength when applied to a sandy material with a low PI and the sulphonated oil-treated material performed well when applied to a clayey material containing a reactive clay mineral. The polymers showed no material-specific properties. Most of the stabilised panels showed an increase in dry strength eight months after construction and this was attributed to the fact that the panels had enough time to dry out and reach their maximum strength over the dry winter months. The final conclusion was that there are some soil stabilisers available that do improve the strength behaviour of pavement materials. It is, however, important to choose the correct stabiliser for the intended purpose.
机译：南非有超过50万公里的未密封道路。在大多数道路网络中，都遇到了不可接受的灰尘水平，乘坐质量差以及在潮湿天气下无法通行的情况。解决这一日益增长的问题的潜在方法是使用土壤稳定剂（添加剂），但是对这些添加剂的研究水平主要包括小型的临时研究。本文的目的是就南非未铺装道路上所选的土壤稳定剂对材料强度的影响进行报告。土壤稳定剂的性能通过确定稳定剂在改善未铺砌道路强度方面的有效性来进行测试，该强度随砾石的变化而变化，对于各种土壤稳定剂在干湿条件下均具有不同的性能。在九个月的时间内测试了有效性。在四种不同的耐磨材料上使用了四种不同的稳定剂。得出的结论是，某些稳定剂确实可以在某些条件下改善路面材料的强度性能。已经发现，酶和磺化油处理的材料在测试期间强度有所增加，并且得出结论，这些稳定剂需要数个干燥月的固化时间才能达到其最大强度。用两种聚合物处理过的材料在施工后两个月内就达到了最大强度。已经发现，当将酶处理的材料施用于具有低PI的沙质材料上时，强度显示出增加，而当对含反应性粘土矿物的黏土材料施以磺化油处理的材料时，表现良好。该聚合物没有显示出材料特有的性质。大部分稳定的面板在施工后八个月显示出干强度的增加，这是由于以下事实：在干燥的冬季，这些面板有足够的时间干透并达到最大强度。最终结论是，有一些土壤稳定剂可以改善路面材料的强度性能。然而，重要的是要为预期目的选择正确的稳定剂。

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