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Strength and Bulk Density of Compacted Mixtures of Kaolinite and Glass Beads
Author(s) -
Lotspeich Frederick B.
Publication year - 1964
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1964.03615995002800060018x
Subject(s) - bead , materials science , compaction , kaolinite , composite material , sphere packing , water content , bulk density , geotechnical engineering , soil water , metallurgy , geology , soil science
Compacted mixtures of kaolinite and glass beads were used to test a hypothesis that the number of contact points of a matrix influences its strength. Four glass bead mixtures were used: ( 1 ) a single‐sized bead, ( 2 ) 2 sizes of beads designed to permit cubic, but not tetrahedral, packing of the largest size beads, ( 3 ) 2 sizes of beads designed to permit tetrahedral packing of the largest sized beads, and ( 4 ) 4 sizes of beads designed to permit tetrahedral packing. From 2 to 40% clay was added to each glass bead mixture; moisture tension at time of compaction ranged from 1/3 to 15 bars. The 4‐component mixture with clay contents above 25% gave the highest dry strength. Maximum bulk densities in all glass bead mixtures were attained at clay contents of 20 to 30%. Maximum strength and bulk density for each mixture was attained at a moisture content between 1 and 5 bars tension regardless of clay content.