What is the function of drilling fluid in rotary drilling in site investigation?

Drilling fluid in rotary serves two main purposes:(i) Facilitate the rotation of drilling tube during rotary drilling;(ii) Act as a cooling agent to cool down heat generated during drilling operation.Traditionally, water is normally employed as drilling fluid. However, it suffers from the following drawbacks:(i) It affects the stability of nearby ground with the introduction of water into the borehole...

Testing Concrete Cores

The examination and compression testing of cores cut from hardened concrete is a well – established method, enabling visual inspection of the interior regions of a member to be coupled with strength estimation. Other properties which can be measured is also given in this paper.IS: 456-2000 specified...

Shrinkage Limit Method To Determine Specific Gravity

Shrinkage limit is defined as the smallest water content at which the soil is saturated. It is also defined as the maximum water content at which a reduction of water content will not cause a decrease in the volume of the soil mass. In other words, at this water content, the shrinkage ceases.In the...

Proctor Compaction Test

AIM OF THE EXPERIMENTThis test is performed to determine the relationship between the moisture content and dry density of a soil for a specified compactive effort.CODE OF REFERENCEIS 2720 (Part 2)- 1980 Methods of test for soils: Part 7Determination of water content- dry density relation using light...