Green and sustainable median on a divided multilane highway

Global Congress on Construction, Material and Structural Engineering 2017

材料科学;土木建筑工程

Ambak, K.^1 ; Bajuri, F.A.A.^1 ; Yusoff, N.A.^1 ; Madun, A.^1 ; Prasetijo, J.^1

Department of Infrastructure and Geomatic Engineering, Faculty of Civil and Environmental Engineering, Universiti Tun Hussein Onn Malaysia, Johor, Batu Pahat

86400, Malaysia^1

关键词: Design characteristics;    Irrigation systems;    Maximum dry density;    Multi-lane highway;    Optimum water content;    Proctor Compaction Tests;    Standard Proctor test;    Sustainable materials;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/271/1/012105/pdf
DOI  :  10.1088/1757-899X/271/1/012105

来源: IOP

【 摘 要 】

The road system in Malaysia showed good growth with increasing number of vehicles on the road. However, statistic of road accident is still at an alarming rate. There are many factor can contribute to the occurrence of an accident. If the accident was caused by road facilities such as street furniture, it is shown that the street furniture was failed to improve the safety of the road users. In this study, a new concept of materials for the construction of road dividers was purpose. The sustainable materials such as laterite soil, Cow Grass, tires and PVC pipes was used to replace the cement and iron guardrails in road divider construction. The main objectives of this study is to design characteristics of a road divider using natural material such as laterite soil, sand, grass and recycle material like used a tyre. A series of experiments such as test liquid limit, plastic limit test, standard proctor test and observations of root growth in 30 days were conducted. The result shows that the plastic index value of 35% was obtained. From the proctor compaction test, the optimum water content was 23% and maximum dry density at 15.3 kN/m3. This value was used to build a prototype of green and sustainable raised road median. The suitability of sand used as the medium in irrigation system was approved. Permeability of sand is 10-2mm/s to 10 mm/s which is having a high rate of flow. The growth of Cow Grass roots was increased by 4.9 cm in 30 days. This shows that, the grass is suitable to grow in laterite soil and can be used as vegetation material. Through the impact test conducted on a model with a scale of 1:7.5, indicate the initial damage occurred when a force reaches 10N. However, the condition of the model is still stable. From the impact test conducted, the prototype of green and sustainable raised road median has a good potential to be used as existing road divider as it can absorb the impact of an accident.