Abstract
Aluminum sludge is production waste from aluminum industry. The purpose of this paper is to investigate the effective utilization of this industrial waste as road base stabilization material. As ferrum lime stabilized soil has been used as road base material for a long time, mixing aluminum sludge with ferrum lime to form a new stabilizer may be beneficial to improve pavement performance as well as utilization of the waste. In order to assess engineering properties of the new stabilizer for its application to road construction, a series of laboratory tests such as unconfined compressive and bending tests had been carried out. Based on test results, both compressive strength and flexural strength of the stabilized soil can be promoted by addition of aluminum sludge, and in particular, the fracture surface energy γs, a parameter which indicates the resistance of a material to cracking, can be improved significantly compared with ferrum-lime or hydrated lime stabilized soils. It can be inferred that the durability of pavement is improved when stabilized with ferrum lime-aluminum.
