Laboratory Tests

Everything you should know about the Aggregate Impact Value (AIV)

by

Designation (Number): B.S. 812: Part 112: 1990. Scope: -Testing coarse aggregates for resistance to Impact Aggregates: -combination of sand, gravel, crushed stone, or other material of mineral composition-Natural aggregates taken from quarries (natural deposits)-Manufactured aggregates include blast furnace slag, clay and slate etc.  Aggregate Classification (ASTM C125)  Fine Aggregates are defined as aggregates passing no. … Read more

lab manual for SOM

by

Strength Laboratory deals with the strength testing of structural materials. While designing any structure, one of the most important concerns of design engineer is to determine the strength of any material that has to be used in the construction of relevant structure. The material should be strong enough to carry load for which the subject … Read more

Permeability of Granular Soil using constant Head Permeameter

by

Similar to the constant head permeameter, there is one more test called falling head permeameter in which fall of head is related to the permeability of the soil sample, Before going to the detail of what the test is we must understand what is permeability? So by general or lay man terms; permeability may be … Read more

California Bearing Ratio (CBR) for determining Shear Strength of subgrade

by

California Bearing Ratio (CBR) test is a compressive nature penetration test. It was originally developed by Caltrans i.e. California Department of Transportation after World War II i.e. in the late 1930s.  The test is specifically used to determine the mechanical strength as well as the potential strength of road subgrades and basecourses materials including the … Read more

Concrete testing by Ultrasonic Pulse Velocity (UPV)

by

How many times as a civil engineer, you have to test a concrete? Hunh! So many Times! But most of the time you find concrete cubes and cylinders being crushed by Compression Testing Machine (CTM) in the laboratory. Now that broken cylinder or cube is useless for you, although you can recycle it but even … Read more