This is termed as swelling Factor. It is defined in the B. P. as the volume in milliliter occupied by 1 g of a drug including any adhering mucilage after it has swollen in an aqueous liquid for 24 h [2]. The swelling factor reflects the mucilage content of the seeds.
What causes swell and what is the swell factor?
Swell is the percentage increase in volume caused by the excavation of soil. Physically, the act of excavation breaks up the soil into particles and clods (lump of earth) of various sizes. This creates more air pockets and results in an effective increase in the soil’s void volume.
What is swell factor of soil?
The swell factor is an adjustment representing this increase in volume and will decrease the need for fill material on the project. For example, if the volume of loose rock is 1.25 times greater than the bank volume it occupied prior to excavation, the rock’s swell factor is 1.25.
How do you calculate swell factor?
Calculating the percentage change in height from the wet soil to the dry will give you a measure of the swell factor of the soil. For example, if the dry soil was 1 inch high and the wet soil is 1.54 inches high, divide 1 by 1.54 and multiply by 100 to get a 65 percent swell factor.
What is the use of swelling index?
The free-swelling index (FSI) is a measure of the increase in volume of coal when heated under specified conditions (ASTM D720; ISO 335). The FSI method is a small-scale test for obtaining information regarding the free-swelling properties of a coal.
Why do we calculate swelling index?
The swell index test procedure is used to determine the general swelling characteristics of bentonite clay. The Swell Index test has not been demonstrated to have a proportional correlation to hydraulic properties, a high swell is considered by most to be a good indicator of bentonite quality.
What is swell percentage?
Swell: The percentage of original volume that a material increases when it is removed from its bank state and becomes “loose.” When excavated, the material breaks up into different size particles that do not fit together, creating voids that reduce the weight per volume.
What is fluff factor?
In the construction industry, the fluff factor refers to excavating dirt. When a project is first being conceived, a cost associated with the initial excavation of overburden and additional excavations needed for foundations, road beds, etc., is a major cost incurred before any actual building begins.
What does 95% compaction mean?
95% compaction means that the soil on the construction site has been compacted to 95% of the maximum density achieved in the lab. Remember the test in the lab uses a specific compaction effort so it is possible to achieve compaction above 100% in the field.
How do you calculate wood swelling?
Multiply the width of the board (in inches) by the annual change in MC (highest annual MC minus lowest). Then multiply the result by the number from the chart. Because few boards are entirely F/S or Q/S, calculate both numbers and shoot for something between.
Which is an example of the swell factor?
This occurs because of an increase in voids. Swell is expressed as a percentage of natural volume, for example, if 10 yd 3 in the ground becomes 13 yd 3 after excavation, the swell factor is 30%. The following table lists swell factors for various engineering materials.
Why does the swell factor increase after excavation?
This occurs because of an increase in voids. Swell is expressed as a percentage of natural volume, for example, if 10 yd 3 in the ground becomes 13 yd 3 after excavation, the swell factor is 30%. The following table lists swell factors for various engineering materials. Bernie Roseke, P.Eng., PMP, is the president of Roseke Engineering.
How to calculate the swell factor of soil?
For example, if the dry soil was 1 inch high and the wet soil is 1.54 inches high, divide 1 by 1.54 and multiply by 100 to get a 65 percent swell factor.
How does the swell factor of a polymer change?
The company determined that increasing the die land length reduces the swell factor of the polymer because the additional residence time in the die land area enables the polymer molecules to properly align along the flow direction. “The rating limit is constantly updated by the VPP program and the Pacific Swell Factor ,” Garnier said.
