CBR Laboratory Analysis for Determining The Number of Compaction Tracks to Achieve Field CBR

Abstract

Compaction is the process of grounding the soil by removing air from the pores of the soil mechanically (beaten, crushed and so on) Compaction is carried out with the aim of improving the technical properties of the soil, namely obtaining the densest soil conditions (maximum solid state). In the process of compaction water content also plays a significant role to achieve maximum density value. Water is a lubricant for the soil to help unify the aggregate and remove air in the compaction process. From the results of compaction in the laboratory can be seen how much compaction energy is given and optimum water content (Wopt) to achieve maximum compaction. From the results of compaction in the laboratory can be applied for maximum compaction in the field, from the calculation of compaction energy in labour from the hammer weight of 4.5 kg, 45.7 cm falling height, g = 10 m/s2. The compaction energy is 1134 kg.m/s2. To get the number of compaction paths needed to achieve maximum compaction can be determined from the equipment used, the amount of energy used as an example of a vibro roller capacity of 10500 kg, get the solidification energy 164.1 (kg.m2/s). So the trajectory required vibro roller tool as much as seven trajectories.

Improvement in Field CBR Values of Subgrade Soil Using Construction-Demolition Materials

“…Lakshami et al (2019) related the resilient modulus with CBR values of different subgrade soils such as clayey sand (SC), silty sand (SM), and well-graded sand (SW). Recently, Srihandayani et al (2020) related the bearing capacity of the soil with CBR values. Rezende and Carvalho (2003) studied the application of quarry wastes as a base layer under the flexible pavements.…”

Influence of Compaction Energy on Cement Stabilized Soil for Road Construction

“…As a result, the lower hydraulic conductivity associated with an additional compaction energy level could make them suitable for use as compacted soil in geotechnical work [11]. Srihandayani et al (2020) [12] describe how to project laboratory compaction results in the field (a Vibro-roller grinding machine) based on finding the number of compaction trajectories. Lindh (2004) [13], concluded that compaction of stabilized soil is necessary to ensure high quality and the required service life of the stabilized material, citing different studies by researchers.…”