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Influence of Weathering in Claystone of Subang Formation on Some Engineering Properties to Effectively Support in Choosing of Slope- Reinforcement Design

Imam A. Sadisun

Abstract. This paper presents weathering characteristics of claystone of Subang Formation in relation to weathering grade classification system and changes of some engineering properties. The field observation and rock-soil sampling were located at Southern Karawang area, West Java, where the claystone is distributed widely. Generally, claystone of Subang Formation can be classified into six degrees of weathering. The examination results of some engineering properties, such as unit weight, cohesion, and internal friction angle as basic parameters of slope stability analysis, indicate good relationship with the change of weathering grade. As an implication, by knowing various weathering grades, the planning or choosing of slope-reinforcement-design will be more effective and efficient.

Keywords: weathering; the degree of weathering; claystone of Subang Formation; engineering properties; slope-reinforcement

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