Application Technology of Red Mud as Road Materials
|School||Chongqing Jiaotong University|
|Course||Road and Railway Engineering|
|Keywords||red mud cement lime and red mud stabilized clay sub base cement and red mud stabilized crushed stone base course road performance formation mechanism of intensity economical efficiency|
Red mud is the largest waste of aluminum production, it takes the massive lands in the stack process, but also has caused the serious pollution to the natural environment. The comprehensive utilization of red mud is an urgently difficult problem to the aluminum metallurgy industry.This project proposed two application measure technologies about the utilization of red mud on highway, there are named cement lime and red mud stabilized clay sub base, cement and red mud stabilized crushed stone base course. Through a large number of reference,this paper has grasped the domestic and oversea researching situation.By massive experiments and analysis of theory, the material composition and the mixture ratio to the road performance has studied when red mud utilized in the sub base, in the base course. The strength mechanisms are analyzed at the same time. Based on the above analysis, the raw material technical performance request, the recommendation mixture ratio composition and the construction technique are proposed, and the economic analysis are acquired when the red mud apply in different pavement structure level.The following results are gained though this project.⑴Regarding the cement lime and red mud stabilized clay sub base, the compressive strength development is quicker at the early stage, later period the compressive strength increased range gradually slows down. The best dosage of red mud is 10%~20%, and the cement, the lime should better intermingle at the same proportion.⑵To the cement red mud stable crushed stone base course, after the red mud mixes into the blend compressive strength development to be quicker at early time, later period the compressive strength increased range gradually slows down. The best dosage of red mud is 1~2 times of cement.Satisfies the standard request in the material performance in the situation, compares with the traditional material, the cement lime and red mud stabilized clay sub base and the cement red mud stable crushed stone base course cement red mud concrete have the obvious economic efficiency and the social efficiency.In addition,it’s very important to study red mud as road materials for reusing the industry waste residue and environmental protection.This research will be helpful in forwarding the development of highway in our country.