Pengaruh Proses Pelapukan Clay Shale terhadap Perubahan Parameter Rasio Disintegritas (DR)

• Main Authors: Idrus M Alatas, Pintor T. Simatupang
• Format: Article
• Language: English
• Published: Institut Teknologi Bandung 2017-04-01
• Series: Jurnal Teknik Sipil
• Subjects: Disintegrasion rasio; clay shale; weathering; drying process
• Online Access: http://journals.itb.ac.id/index.php/jts/article/view/4524/2475
• ISSN: 0853-2982; 2549-2659

The background of this research because of the frequent occurrence of the failure in the geotechnical design of clay shale caused by weathering. Disintegration ratio is a comparison of physical changes due to weathering at certain times of the initial conditions. Changes in physical properties due to clay shale weathering determined by the disintegration ratio (DR).Clay shale weathering will occur more quickly as a result of wetting and drying cycles when compared with the drying process. While due to the increased number of cycles of wetting at the same time, causing weathering on clay shale will be faster again. Until the 80th day of drying time, the magnitude DRof Semarang-Bawenclay shaleand Hambalang are the same, namely DR = 0.916 (completelly durable). However, due to wetting and drying cycles on day 32, samples of Semarang-Bawenclay shale is DR = 0.000 or non durable completelly, while on Hambalang clay shale in same day DR between 0.2117 to 0.3344. Generally Semarang-Bawen clay shale will be faster weathered than Hambalang clay shale. It is caused by the mineralogy content of Semarang-Bawen clay shale has dominated by Smectite, and Hambalangclay shalehas dominated mineral Kaolinite and Illlite.