| Author | Suttisak Soralump |
| Call Number | AIT Thesis no. GE-95-09 |
| Subject(s) | Roads, Soil-cement
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of
Engineering, School of Civil Engineering |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GE-95-09 |
| Abstract | Bangna-Bangpakong Highway have a serious problem with settlement and stability of
road embankment. Ground improvement by Deep Mixing Method is used to rehabilitate this
highway. Laboratory trial mixes were conducted cement slurry to determine optimum mix
proportions to achieve undrained shear strength 500 kPa in laboratory or unconfined compressive
strength of 1000 kPa. Dry mixing was performed to investigate the behaviour of treated soil with
different type of admixtures. Basic properties, undrained shear strength, and oedometer test were
conducted to investigate the behaviour of cement, BEEST AR F, and cement + BEEST AR A
treated soil. The addition of BEESTAR A additive to soil-cement can improved the strength of
untreated soil than used cement only. BEESTAR F admixture cannot significantly improved the
strength of untreated soil but it can improved the consolidation characteristics of untreated soil.
Cement admixture is the most suitable and economical method for improving the strength and
consolidation characteristics of untreated soil and it easily available.
Cement admixture was used to prepare unconfined compression test specimens with
different water cement ratio. Mixing was performed by used soil sample from Bangna-Bangpakong Highway at specified depth. Higher water cement ratio, produced unconfined
compressive strength. The improved strength at each depth is dependent on the strength and
physical properties of untreated soil. The unconfined compressive strength of 1 OOOkPa can be
achieved by slurry mixing with 200 kg/m3 of cement at water cement ratio of 0.5 at 28 days. Dry
mixing can achieved such strength at 150 kg/m3 of cement content. Dry mixing with 1.0 kg of
BEES TAR A additive can attain such strength with 125kg/m
3 of cement content.
Bangna-Bangpakong Highway with Deep Mixing Method improvement was analysed
regarding the bearing capacity, total and rate of settlements, and stability of embankment.
Different cement pile spacing and length were analysed to find out the optumum design
consisting of 0.6m diameter, I.5 m spacing and 16m length for Section 4 at km 34+790 to km
40+800. |
| Year | 1996 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GE-95-09 |
| Type | Thesis |
| School | School of Civil Engineering |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical Engineering (GE) |
| Chairperson(s) | Bergado, Dennes T. |
| Examination Committee(s) | Noppadol Phien-Wej ;Sugimoto, M. |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 1996 |