Shear Resistance and Deformation Characteristics of Sedimented Coal Fly Ash-Cement Mixture

Abstract

It is necessary to utilize coal fly ash in geotechnical engineering field. Coal fly ash is a useful material. In case of using as reclamation material, cement is mixed into coal fly ash to stabilize the ground before reclaiming coal fly ash. Effects of cementation on mechanical properties of coal fly ash should be investigated. Authors focus to utilize coal fly ash as reclamation material in the coastal area. In order to investigate effects of cementation on mechanical properties of sedimented coal fly ash, triaxial compression tests were carried out. From a series of triaxial test results and considerations, the following conclusions were obtained: (1) Coal fly ash sedimented in looser condition with increasing amount of cement. (2) The increase of shear resistance caused by cementation effects appeared in small strain and low confining stress level. (3) Dilatancy property of sedimented coal fly ash-cement mixture depended on confining stress and cementation.