Abstract:
The estimation of rock mass strength is a key parameter in geotechnical
engineering which is used in the design of geotechnical structures like tunnels, dams
and slopes. Mechanical characterization was carried out on limestone from Samana
Suk Formation to explore their potential for utilization as construction and aggregate
material. Laboratory test were performed in accordance with ASTM and ISRM
standards to determine UCS, UTS, SHR, SG, WA, LAA and SS. The UCS was
determined by using universal testing machine to crush core samples, UTS test was
also performed on core sample in horizontal direction, in accordance to ISRM and
ASTM suggested methods. Average values calculated for SG is 2.71%, WA 0.51%,
LAA 14.12% and SS values 0.6%. The UCS ranges from 35.84 MPa to 45.37 MPa
with a mean value of 40.56 Mpa and UTS values ranges from 6.80 MPa to 12.58 MPa
with a mean value of 9.07 Mpa and SHR average values ranges from 37.67 to 44.00
of the studied samples. The evaluated mechanical and physical properties were
compared with standard specifications for their qualification as construction
materials. Petrographic study of the rocks reveals the presence of calcite, bioclast and
pyrite in the samples. The study indicates that the average calcite content is 86.42 %
and average bioclast content is 12.58%. Limestone of Samana Suk formation fall
within standards specifications limits and can be used for construction purposes and
utilized as aggregate sources indigenous construction industry.
