Experimental study of strength of clay infilled rock joints | |
| Author | Ho, Ching-yuan |
| Call Number | AIT Thesis no.GT-89-21 |
| Subject(s) | Rock mechanics Clay--Testing |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | A model rock material made of gypsum / celite is used to simulate the strength behavior of soft rock joints. Stiff Bangkok clay is used as an infill material whose friction angle (¢ ) is only 42% of the ¢ value of model rock joint. Specimens are cast in idealized saw toothed joint and corrugated joint shapes with asperity amplitude (a ) of one centimeter, and with joint surface areas of 15 cm x 15 cm and 30 cm x 30 cm. Inclination angle (i ) of 0 ° , 7.5° , 15° and 30° of the saw - tooth joints and about 38° of the corrugated joints are tested in direct shear with normal s tresses ranging from 0.3 - 1.0 Mpa . For i = 15° and 30° the shear strength of the infilled joint reduces to that of infill material when t / a is greater than 1. However for flatter joint i = 7.5°, it is found that only with infill thickness t / a of 1/2 is sufficient to decrease the shear strength of infill joint to that of the infill material. Rough infill joints with i equal to 7.5°, 15° and 30 ° under the normal stresses ranging from 0. 3 - 1.0 Mpa dilate when t/a < 1 / 2 ; however , they compress when t/a > 1. |
| Year | 1990 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Geotechnical and Transportation Engineering (GT) |
| Chairperson(s) | Noppadol Phien-wej |
| Examination Committee(s) | Rantucci, Giovanni ;Indraratna, Buddhima |
| Scholarship Donor(s) | Ret - Ser Engineering Agency Taipei, R.O.C. |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1990 |