Uniaxial Compression Tests and Deformation Measurements of A Sarawak Sedimentary Rock

We often lack of basic data to solve engineering problems such as foundation design on local rocks. We often assume data and properties obtained from foreign publications based on foreign rocks which often are greatly varied from local conditions, and blindly apply in the analysis.  Perhaps, we are lucky because we always apply large safety factors, but problems occasionally did arise, which resulted in great disputes and costs.

This research paper attempts to obtain some basic properties of a local sedimentary rock, Salak South Sandstone, so as to understand the behaviour of the local rock under uniaxial loading conditions.

Investigation of Severe Settlements of some Single and Double Storey Houses at Bintulu

Pimple surface of Rock Sample

Most of the failed joints of rock samples have either totally smooth or chaotic irregular surfaces. 
But this failure plane of the Graywacke is rough and is quite uniform.
Perhaps, I am still more used to smooth surfaces, pleasant to see and touch.

Heterogeneous Rock

Sometimes, you can see different constituents within a rock core. This picture shows the dark grey materials surrounded by the lighter rock materials. It shows that Nature seldom comes out with homogeneous materials, especially the sedimentary or metamorphosed rocks.