Combined Use of Calcium Chloride and Fly Ash in Road Base Stabilization

• DOI: 10.3141/2186-13
• Publication Date: 2011-01-25T02:07:43Z
• Authors: Chang-Seon Shon; Donald Saylak; Surendra K. Mishra
• Keywords: Cementitious

Chemical stabilization with cementitious and chemical additives such as portland cement, lime, fly ash, calcium chloride (CaCl 2 ) is now being extensively used in road base or subgrade primarily to enhance mechanical strength improve resistance attack, resulting a more durable roadway. In recent years, there has been renewed interest the combined use of these induce synergistic effect on strength, well deficiencies single-chemical treatment process (e.g., slow early development ash susceptibility leaching CaCl wet environments). The adding ash–treated roadbed during construction was investigated. role system studied, where determination made how soluble species plays bringing particles closer aggregate it an setting time, compaction efficiency, ultimate strength. Laboratory test data revealed that addition not only accelerated rate but also increased initial long-term constructed roadbed. On basis laboratory tests, mathematical model developed predicts composites. Finally, field performance showed ashes can be effectively if added system.