en Structure-Concrete Structure- Concrete Research Paper Research Paper <p> Roadways have a high potential for utilization of large volume of the fly ash stabilized mixes. In this study, an attempt has been made to investigate the use of Class F fly ash mixed with lime precipitated electroplating waste sludge–cement as a base material in highways. A series of tests were performed on specimens prepared with fly ash, cement and lime precipitated waste sludge. California bearing ratio (CBR) tests were conducted for 70%-55%fly ash, 8%cement, and 30%-45%waste sludge combinations. Results show that the load bearing strength of the mix is highly dependent on the waste sludge content, cement as well as curing period. The CBR value of fly ash mixed with electroplating waste sludge and cement has been increased to manifold and results the reduction in the construction cost of the pavement. The study also encourages the use of two potentially hazardous wastes for mass scale utilization without causing danger to the environment, vegetation, human and animal lives. </p> Fly ash, cement, waste sludge, highway, CBR, load bearing strength 315 326 http://ijce.iust.ac.ir/browse.php?a_code=A-10-422-1&slc_lang=en&sid=1 Malik Shoeb Ahmad shoeb_33@yahoo.com 1800319475328460010322 1800319475328460010322 Yes Aligarh Muslim University S. Salahuddin Shah sssced@yahoo.com 1800319475328460010323 1800319475328460010323 No Aligarh Muslim University