plasticity index


Also found in: Acronyms.

plasticity index

[plas′tis·əd·ē ‚in‚deks]
(geology)
The percent difference between moisture content of soil at the liquid and plastic limits.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

plasticity index

Numerical difference between the liquid limit and the plastic limit.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
Results reported that the liquid limit and plasticity index of the specimen increased in the initial period of the drying-wetting cycles followed by a stable state in the latter period.
3, total dimensionless normal contact stiffness [K.sup.*.sub.n] changes with the total dimensionless contact load P* and the fractal dimension's influence on total dimensionless normal contact stiffness, we select fractal dimension D = 1.1, D = 1.9 respectively, and simulate the fractal roughness parameters G* and plasticity index [empty set] 's impact on the total dimensionless normal contact stiffness.
Optimum moisture content of cohesive soils increases whereas the maximum dry unit weight obtained through compaction tests decreases with plasticity index of soil (Berawala, Solanki 2010; Pandian et al.
Their equations are also based on a modified hyperbolic model, which includes some variables namely shear strain amplitude, confining pressure, and plasticity index (PI).
(ii) Both values of liquid limit and plastic limit increase and the plasticity index decreases with increasing percentages of both types of fly ash content.
Index and Geotechnical Properties of the Soil Used Properties Value Specific gravity 2.63 Grain size: Sand 11% Silt 42% Clay 47% Consistency limits: Liquid limit 84% Plastic limit 29% Plasticity index 55% Compaction (Standard Proctor): Maximum dry density, MDD 11.05 kN/m3 Optimum moisture content, OMC 28% Natural moisture content 10-70% Unconfined compressive strength 32 kPa Split-tensile strength 3.26 kPa Swelling index 0.078 Mineral Na-Montmorillonite Table 2.
9 Standard tests for Limit Liquid, Plastic Limit and Plasticity Index of soils.
This result supports the aforementioned Atterberg limit test in which Datu Salomay also obtained the highest plasticity index. All the soil samples showed a passing percentage of more than 10% for sieve no.
Liquid Limit and Plasticity Index of Kuksa mine clay Plasticity Liquid Limit, Plasticity group according Depth, m [W.sub.L], % Index, PI, unit LST EN 1997-2:2007 * 1.5-6.0 41.46 18.53 6.0-9.8 41.92 19.66 0.2-6.0 38.23 17.57 Medium plasticity 6.0-9.0 38.81 18.96 2.5-6.0 41.22 19.43 6.0-10.6 40.95 20.67 Note: * LST EN 1997-2:2007 Eurocode 7 - Geotechnical Design - Part 2: Ground Investigation and Testing
Bray and Sancio [53] proposed that fine-grained soil with a plasticity index equal to or less than 12 and natural water content equal to or greater than 0.85 liquid limit has liquefaction potential.
The relative distance plasticity index (RDPI) measures the relative distances between values of architectural parameters measured for all pairs of individuals growing in different physiognomies.
Common abbreviations (such as "xpct" for "expecting" and "trrn" for terrain") defined side-by-side along with a host of engineering words and phrases, from "activity" ("ratio of the plasticity index to the percent by dry mass of soil particles finer than 0.002 mm [2 microns] in size") to "zonal flow" ("large-scale atmospheric flow in which the east-west component [i.e.