Weighted plasticity index calculation
To calculate the weighted average of a frequency, each value is multiplied by its frequency, then added together and divided by the total number of units in the given situation Learning Outcomes The values of D60, P200, and PI were the index properties chosen for correlation. In addition, for materials with a PI > 0, a weighted Plasticity Index, termed wPI was used: wPI = Passing #200 · Plasticity Index = P 200 · PI (1) with P200 used as a decimal and PI used in % form Table 4 shows typical ranges of D60, P200, PI and wPI for the USCS and AASHTO materials. The liquid limit, plastic limit and plasticity index of soils are also used extensively, either individually or together, with other soil properties to correlate with engineering behavior such as compressibility, permeability, compactibility, shrink‑swell and shear strength. The Plasticity Index (PI) is a measure of the plasticity of a soil. The PI is the difference between the Liquid Limit and the Plastic Limit (PI = LL – PL). Soils with a high PI tend to be clays, those with a lower PI tend to be silts and those with a PI of 0 (non-plastic) tend towards sands with little or no clay or silt.
That plasticity index is lp = Liquid limit - Plastic limit. So if you can sample and then you calculate what will be the weight of the soil and the can divert of the soil.
water in a soil, based on its dry weight, at which the maxi- limit, plastic limit, and plasticity index of soils are given in The formula for the U-line is vertical. either the Plasticity Index and Weighted Plasticity Index (WPI) limits or Linear At the completion of each batch, the Contractor shall calculate the average expressed as a percentage of the weight of the oven dried soil at which the soil can be rolled into threads For low Plasticity Index (PI) soils, it is permissible to reduce the initial diameter of the ellipsoidal mass CALCULATIONS. 6.1. Mass of Relationship Between Plastic Index with Volumetric and Linear Shrinkage in formula to evaluate volumetric shrinkage in relation to field moisture content changes but coefficient, the more important the weight of the corresponding variable. plasticity index using available data in literature. Compression index of Lusi mud volcano is 0.367 from liquid limit-based calculation and is 0.454 from [9] shows that mineral content plays important role on specific gravity (GS) weight. The studied samples were analyzed to measure the natural unit weight (γn), specific grav- ity (G), liquid limit (LL), plastic limit (PL), plas- ticity index (PI) and CBR is an indirect measure which speaks about correlation of the strength of NCHRP based on weighted plasticity index and Agarwal and Ghanekar (1970)
The studied samples were analyzed to measure the natural unit weight (γn), specific grav- ity (G), liquid limit (LL), plastic limit (PL), plas- ticity index (PI) and
The test calculates the Weighted Plasticity Index (WPI) (reference A) as the product of Plasticity Index (I P) and Percent passing the 0.425 mm sieve (G); using values obtained from plasticity index and grading test reports for samples of Type A The term weighted plasticity index (WPI) was therefore adapted to clearly differentiate from the PI and is the product of the plasticity index and the number percentage passing the 425 micron 2.1 Plasticity Index—Plasticity index is a test conducted on soil samples as set out in this test method. The plasticity index is a range of moisture in which a soil remains in a plastic state while passing from a semisolid state to liquid state. Numerical difference between Liquid Limit and Plastic Limit of a soil (PI = LL - PL) using Tex-106-E. The Weighted Plasticity Index in Road Design and Construction. February 12, 2018 by materials with a PI > 0, a weighted Plasticity Index, termed wPI was used: wPI = Passing #200 · Plasticity Index = P 200 · PI (1) with P 200 used as a decimal and PI used in % form 22 Shrinkage Test—This component of the test is identical in procedure to the core shrinkage test, although fewer measurements are required as the shrink-swell index is based on the oven-dried state. A shrinkage core, 45–50 mm in diameter and a length of 1.5–2 diameters, is trimmed from the soil sample. (a) The Weighted Plasticity Index (WPI) is defined as the value of the plasticity index (PI) times the % passing the 425 micron sieve. The Contractor must provide the calculations to verify the WPI.
Weighted Plasticity Index –. RC 326.01. PI x Percent passing 0.425 mm sieve April 2016. 1. Scope. The test calculates the Weighted Plasticity Index (WPI).
The test calculates the Weighted Plasticity Index (WPI) (reference A) as the product of Plasticity Index (I P) and Percent passing the 0.425 mm sieve (G); using values obtained from plasticity index and grading test reports for samples of Type A
water in a soil, based on its dry weight, at which the maxi- limit, plastic limit, and plasticity index of soils are given in The formula for the U-line is vertical.
and Plasticity Index for the alluvial clayey soils which cover a large part of established in the form of an equation of CBR as a function of. Percentage Finer and Index(Ip) ,greater than zero,a weighted plasticity index. ,termed Ipwis used
water in a soil, based on its dry weight, at which the maxi- limit, plastic limit, and plasticity index of soils are given in The formula for the U-line is vertical.