| dc.identifier.citation | Hardiyatmo, H.C., 1999, “Mekanika Tanah I”, PT. Gramedia Pustaka Umum, Jakarta. Ingles, O.G. dan Metcalf, J.B., 1992, “Soil Stabilitzation Principles and Practice”, Butterworths Pty. Limited, Melbourne. Kezdi. A, 1979, “ Stabilized Earth Roads”, Elsevier Science Publishing Company, New York. ashari, 2000, “Pengaruh Campuran Kapur dan Bubuk Bata Merah Pada Sifat Mekanis Tanah Lempung Grobogan”, Naskah Seminar Hasil Penelitian Tesis S-2, Program Studi, Teknik Sipil, Jurusan Ilmu-ilmu Teknik, Program Pascasarjana UGM Jogjakarta. Soelastri, S dan Rachlan, A., 1979, “Stabilisasi Kapur dan Pozzolan pada Beberapa Macam Tanah Lempung yang Terdapat di Jawa Barat”, Laporan penelitian, BM 002 Dirjen Bina Marga. Damoerin, D., dan Virisdiyanto,1999, “Stabilisasi Tanah Lempung Ekspansif dan Pasir dengan Penambahan Semen atau Kapur Untuk Lapisan Badan Jalan”, Prosiding Seminar Nasional Geoteknik ’99, hal. 1-10. Fathani, T.F., dan Adi, A.D., 1999, “Perbaikan Sifat Lempung Ekspansif dengan Penambahan Kapur”, Prosiding Seminar Nasional Geoteknik’99’ .97-105. Anonim, 1990, “Earth Manual”, part 2, third edition, United States Departement of The Interior Bureau of Reclamasi, Denver Colorado. Anonim, 1992, “Annual Book of ASTM Standards” section 4, Volume 04 08, Philadelphia,USA. | en_US |
| dc.description.abstract | Clay soil is usually weak and has low shear strength because it
contains many minerals that tend to be very high expansive. Expansive soils
owe their characteristics to the presence of swelling clay minerals. As they
get wet, the clay minerals absorb water molecules and expand; conversely, as
they dry they shrink, leaving large voids in the soil. The problems arise when
subgrade of highway pavement is made of expansive soil as it can be seen on
Tanon, Sragen. The pavement damage is signed by cracking, settlement, and
rutting. Tanon clay is classified as high plasticity inorganic clay (Wiqoyah,
2003). The Liquid Limit and Plasticity Index are 88.03% and 49.44%
respectively. The cohesion and friction angle are 19.97 kg/cm2 and 2.140.
The soil contains smectite clay minerals, such as montmorillonite, which
exhibits the most profound swelling properties. Based on the last research on
Tanon clay, the treatment should be carried out to improve the shear strength
of the soil and to reduce all problems on the pavement. This research focuses
to study the physical and mechanical characteristic of the Tanon clay mixed
by lime and trass. The Tanon clay is mixed by lime and trass in the
percentage of: 0%, 2.5%, 5%, 7.5% and 0%, 2.5%, 5%, 7.5%, 10%
respectively. The mixed soil samples are tested in atterberg limit, gradation,
specific gravity, and Unconsolidated-Undrained Triaxiall apparatus. The
samples are in 3 days curing and 4 days soaking. The result shows that the
lime and trass stabilization increases specific gravity, Plastic Limit and
Shrinkage Limit. On the other hand, it reduces Liquid Limit and Plasticity
Index. As the percentage of lime and trass increase, the friction angle tends
to improve. The maximum friction angle occurs on the adding of both lime
and trass of 7.5%. For 3 days of curing, the friction angle is 19.01o and for 4
days of soaking, it exhibits friction angle of 17.67o. The cohesion of Tanon
clay stabilized by lime and trass also increases. The maximum cohesion of sample with 3 days curing occurs in the percentage of lime and trass of 7.5%
and 2.5% respectively. On the other hand, the maximum cohesion of sample
with 4 days soaking happens in the percentage pf lime and trass of 10% and
7.5% respectively. The simultaneous increasing of friction angle and
cohesion show that the lime and trass stabilization on clay is effectively
improving the soil strength. | en_US |
