Influence of Cement – Sodium Silicate Grout Admixed With Calcium Chloride and Kaolinite on Sapric Peat / Saprogeninių Durpių Poveikis Cemento Ir Natrio Silikato Skiedinio Su Kalcio Chloridu Bei Kaolinitu Savybėms

Abstract

Sapric peat is extremely soft, unconsolidated and has high organic content. It is most decomposed peat with less fiber content among all peats. This paper investigates the effectiveness of using different ratios of cement-sodium silicate system grout compounds with kaolinite in mechanical property (shear strength) and micro-structural properties (SEM and EDX) of sapric peat samples after 3 and 30 days of curing. The study showed that the kaolinite was effective in increasing the shear strength and reducing the moisture content of the treated peat. Calcium chloride seemed to have different effects on the grouts strength. It caused to increased shear strength of samples until the net charge of the sample changed to zero and then it decreased with further increase in calcium chloride. By increasing sodium silicate (within 3%), cement and soaking time on treated peat, it was observed that they are able to increase the shear strength and density with a corresponding decrease in moisture content, porous microstructure, and the multitude of voids of confection.