In a stress-strain curve there are various regions and limits like you might have heard about elastic limit and yielding point etc. However in this post we will not talk about all of these points and will only discuss about a phenomenon named “Strain Hardening”.
This topic is very important for civil engineers and structural engineers, as the reinforcing steel bars go through this phase…
Knowing the density of soil at field is of utmost importance for a transportation and civil engineer. The Soil under the action of load consolidates and settles due to empty pores and spaces and also due to expulsion of moisture and air within those pores and…
Determination of Field Density of soil by drive cylinder (core cutter) method (AASHTO T204 -90)
October 7, 2016
Knowing the density of soil at field is of utmost importance for a transportation and civil engineer. The Soil under the action of load consolidates and settles due to empty pores and spaces and also due to expulsion of moisture and air within those pores and…
Marshall Stability and Flow Test is basically one portion of the Marshall Mix Design process beside Void ratios and Density calculations as other processes. Marshall Stability Test gives an idea about the sustainability and strength of the asphalt mix of various proportions under the dynamic loading of the traffic.
As per the standard procedure for the Marshall Stability test, the sample is first…
The word asphalt, asphaltic concrete, bituminous mixes all is pointing to the same things almost. The shining blackish paved road we ride almost every day and almost several hours of our lives are spent over them is asphaltic pavements.
You know asphalt pavements have…
Abrasion is known as process of scraping or wearing something away, technically speaking; abrasion in geology is the mechanical scraping of a rock surface by friction between rocks and moving particles during their transport by wind, waves, gravity, running water or erosion.
Sand replacement test method is used to determine the field density or in-place density of earth embankments, road fills, sub-grade, sub-base or any of compacted material. This method serves as base upon which one can accept the density of a compacted material to a specified magnitude or to a percentage of maximum unit dry density determined as proctor.
As we know that moisture content of the soil…
To study about materials is very essential for civil engineers. Civil Engineers deal with variety of materials like concrete, cement, aggregates, soil, bricks and various others that are used to construct or to support some structural load.
The ultimate destination of load…
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The limit of water absorption by coarse aggregates is determined so as to calculate the appropriate amount of water to be added to the concrete mix, thus modifying the water cement ratio. A bone dry aggregate…
Determine the moisture content of timber by oven dry method - Experiment
September 12, 2014
To determine the moisture content of timber by oven dry method
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Apparatus
Oven, weighing device, timber specimen.
Reference:
D2016-(Reaffirmed in 1983)
Scope
This method covers the determination of the moisture content of the wood.
Background
The moisture content of timber is the quantity of moisture or water contained in it…
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…
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…
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 defined as;
Ability of material to allow water to pass through it
Soil in…
California Bearing Ratio (CBR) for determining Shear Strength of subgrade
November 29, 2013
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…
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…
