Mechanical Behavior of Cement Stabilized Rammed Earth (CSRE) Wall Under Axial load for earth building

Abstract

This paper aims to investigate the mechanical behavior under axial load of cement Stabilized Rammed Earth (CSRE) wall with steel reinforcement varied slenderness wall. Lateritic was used for the study by being mixed with Portland cement, type 1 at the ratio of cement to lateritic soil of 1:7 by weight of dried lateritic soil. Standard compaction test was carried out either with or without cement in order to find Optimum Moisture Content (OMC) and Maximum Dry Density (MDD). Test specimens were the OMC to mix lateritic soil with and without cement with dimension of 400 x 400 x 200 mm compacted 95% of MDD. Compressive strength of CSRE Prisms was tested by cut specimens 400 x 400 x 200 mm. The flexural and compressive strength test was conducted by rammed earth mixed cement wall at 125 mm. thick and 1000 mm. wide, slenderness ratio (h/t) at 8, 10 and 12, respectively, which was steel reinforcement with 5-RB9 mm. Soil compaction was controlled for not less than 95% of MDD of standard compaction in both cases. After 28 days of incubation, the samples were tested with axial load by one-point loading. The standard compaction test result shows that lateritic soil with and without cement have the OMC at 9.16 and 10.92 % and the MDD values of 1.984 and 1.926 g/cm3 respectively. The compressive strength of CSRE Prisms results of soil-cement rendered with and without cement were 48.35 and 12.74 kg/cm2 respectively. The maximum axial load of soil-cement rendered wall was 11,512.80, 40,599.49, 39,301.14 and 35,406.09 kg at the h/t of 6, 8, 10 and 14 respectively with the axial load being inversely proportional to the h/t.