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Title: TREATMENT OF CRUSHED STONE WITH QUATERNARY AMMONIUM CHLORIDE
Accession Number: 00237195
Record Type: Component
Abstract: THE EFFECT OF A QUATERNARY AMMONIUM SALT ON THE STABILITY OF A BASE COURSE MATERIAL TREATED WITH VARYING PERCENTAGES OF THE SALT AND EXPOSED TO THE ACTION OF WATER WAS DETERMINED BY INVESTIGATING ITS SHEARING STRENGTH. A GRANULAR BASE COURSE MATERIAL OF CRUSHED ROCK WAS TESTED WITH THE QUATERNARY AMMONIUM SALT, DIOCTADEYL DIMETHYL AMMONIUM CHLORIDE. PRELIMINARY INVESTIGATIONS WERE CONDUCTED TO ESTABLISH THE MAXIMUM DRY DENSITIES AND OPTIMUM MOISTURE CONTENTS. CURING STUDIES WERE ALSO CONDUCTED BY AIR-DRYING THE SPECIMENS TO ESTABLISH THE RESIDUAL MOISTURE CONTENTS AT WHICH THE SOAKED SPECIMENS WOULD GIVE THE MAXIMUM IMMERSED CALIFORNIA BEARING RATIO /CBR/. THE SPECIMENS FOR DETERMINATION OF SHEARING STRENGTH WERE MOLDED BY VIBRATIONAL COMPACTION TO NEAR STANDARD PROCTOR DENSITY AT THE OPTIMUM MOISTURE CONTENTS. THE SPECIMENS WERE CONFINED IN RUBBER MEMBRANES AND WERE THEN CURED BY AIR-DRYING. THEY WERE SOAKED VERTICALLY IN WATER AND WERE TESTED BY THE UNCONSOLIDATED-UNDRAINED TRIAXIAL SHEAR TEST. THE MOHR ENVELOPES AND THEIR 95 PERCENT CONFIDENCE LIMITS WERE EVALUATED USING THE LEAST SQUARES METHOD DEVELOPED BY BALMER. THE FOLLOWING CONCLUSIONS ARE BASED ON THE DATA OBTAINED' /1/ QUATERNARY AMMONIUM SALTS ARE EFFECTIVE ADDITIVES FOR IMPROVING THE SHEAR STRENGTH OF A WATER SUSCEPTIBLE GRANULAR MATERIAL UNDER ADVERSE MOISTURE CONDITIONS, /2/ WITHOUT TREATMENT THE SHEAR STRENGTH OF THE MATERIAL VARIES GREATLY, /3/ THE AVERAGE SHEAR STRENGTH OF THE UNTREATED MATERIAL IS SIGNIFICANTLY LOWER THAN THAT OF TREATED MATERIALS, /4/ THERE IS LITTLE VARIATION IN THE SHEAR STRENGTH OF TREATED MATERIAL UNDER EXTREME MOISTURE CONDITIONS, ELIMINATING THE UNCERTAINTIES OTHERWISE INESCAPABLE AND RISKY FOR DESIGN PURPOSE. REFERENCES= ASTM, PROC., BALMER, VOL 52, PP9 1260-1271, 1952.
Supplemental Notes: Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
Monograph Accession #: 01410074
Authors: Demirel, TFarrar, M HHoover, J MPagination: pp 61-62
Publication Date: 1966
Serial: Media Type: Digital/other
Features: References
(1)
; Tables
(1)
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Geotechnology; Highways
Files: TRIS, TRB
Created Date: Feb 24 1994 12:00AM
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