G MS THESIS_final version_Maxim Prokudin.pdf - Digital Repository ...

157MaterialsLoess-CementVery intriguing discoveries were produced for the loess and cement composition piers andare outlined below:upon the failure, shear planes were developed within the top portion of the piers,the piers had undergone a very sudden and brittle type of failure,prior to cracking the loess piers were found to develop the highest level of stiffnessamong all loess, cement and aggregate composition single piers.Therefore, loess and cement composition piers have shows a lot of potential for the futureinvestigation, where if no cracking is achieved, the composition can be beneficial due topotential for greater performance, simplicity, constructability and affordability.AdmixturesAs the admixture components were utilized in a variety of applications, the impact on overallload and pier stiffness performance was studies and the results are outline below:addition of fiber component to the loess and cement composition piers has proven tobe ineffective and showed significant reduction in pier strength at the level of serviceload,addition of NS7 component has shown improvement in load bearing in cementcomposition piers at the level of service load and the opposite effect at the ultimateload,addition of cement type K component has shown reduction in pier stiffness at theservice load and opposite effect at ultimate load.