当前位置: X-MOL 学术J. Infrastruct. Preserv. Resil. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Investigation of Pindan soil modified with polymer stablisers for road pavement
Journal of Infrastructure Preservation and Resilience Pub Date : 2020-06-29 , DOI: 10.1186/s43065-020-00009-8
Hyun Kyu Park , Hyuk Lee , Vanissorn Vimonsatit

Road failures are often caused by structural weaknesses, and particularly unsealed roads are vulnerable to water as water easily flows into road structures. Moisture susceptibility of materials is an important aspect when pavements are designed as moisture can weaken bonds between aggregates. Pindan soil is a red soil, known as a soft and moisture sensitive soil. Polymer stabilisers have been proved that they can improve soil mechanical properties by providing an internal waterproofing. Studies of the polymer-Pindan soil stabilisation have been focused on engineering performances, but literature shows little information on the fundamental information of Pindan soil. This project focuses on fundamental information of Pindan soil and its improved performances using polymer stabilisers. Plastic index, specific gravity and particle size distribution were tested to obtain the basic properties. Compaction, Unconfined Compressive Strength and California Bearing Ratio tests were performed to determine the mechanical properties. The chemical property was examined using X-ray diffraction. Furthermore, the waterproof effect of the polymers on the stabilised Pindan soil was investigated from capillary rise tests. In addition, the mechanical properties of individual soil grains were investigated using nanoindentation tests. The materials used for this investigation primarily consisted of Pindan soil collected in Broome, Western Australia, and three polymer products manufactured in Australia. Based on the results, it is evident that the failure behaviour, strain and strength as well as the basic properties of the soils are affected and changed by the Polymer stabilisers. The type of polymer influenced the optimum moisture contents and strengths rather than the amount of polymer. Similarly, Nanoindentation technology provided various information such as elastic modulus, hardness, packing density, stiffness, cohesion and fracture toughness of soils at nano-scales. Polymers can reduce water ingress and minimise moisture in the pavement structures. Thus, the structures can maintain its strength and prevent deformation, which will increase the lifetime of unsealed pavements.

中文翻译:

聚合物稳定剂改性公路铺平土壤的试验研究。

道路故障通常是由于结构薄弱引起的,特别是未密封的道路易受水的影响,因为水很容易流入道路结构。当设计路面时,材料的水分敏感性是重要的方面,因为水分会削弱骨料之间的结合力。品丹土壤是一种红色土壤,被称为对湿气敏感的土壤。已经证明聚合物稳定剂可通过提供内部防水性来改善土壤机械性能。聚合物-Pindan土壤稳定化的研究一直集中在工程性能上,但是文献显示很少有关于Pindan土壤基本信息的信息。该项目侧重于品丹土壤的基本信息及其使用聚合物稳定剂的改良性能。塑性指数 测试比重和粒度分布以获得基本性能。进行压实,无侧限抗压强度和加利福尼亚轴承比测试以确定机械性能。使用X射线衍射检查化学性质。此外,通过毛细管上升试验研究了聚合物对稳定的Pindan土壤的防水作用。另外,使用纳米压痕测试研究了单个土壤颗粒的机械性能。用于调查的材料主要包括在西澳大利亚州布鲁姆收集的品丹土壤和在澳大利亚生产的三种聚合物产品。根据结果​​,很明显,故障行为 聚合物稳定剂会影响和改变土壤的应变和强度以及土壤的基本特性。聚合物的类型影响最佳的水分含量和强度,而不是影响聚合物的量。同样,纳米压痕技术可提供各种信息,例如纳米尺度的土壤弹性模量,硬度,堆积密度,刚度,内聚力和断裂韧性。聚合物可以减少水的进入并使路面结构中的水分最小化。因此,结构可以保持其强度并防止变形,这将增加未密封路面的使用寿命。纳米级土壤的堆积密度,刚度,内聚力和断裂韧性。聚合物可以减少水的进入并使路面结构中的水分最小化。因此,结构可以保持其强度并防止变形,这将增加未密封路面的使用寿命。纳米级土壤的堆积密度,刚度,内聚力和断裂韧性。聚合物可以减少水的进入并使路面结构中的水分最小化。因此,结构可以保持其强度并防止变形,这将增加未密封路面的使用寿命。
更新日期:2020-06-29
down
wechat
bug