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Title: EFFECT OF PETROGRAPHIC VARIATIONS OF SOUTHWESTERN IOWA LOESS ON STABILIZATION WITH PORTLAND CEMENT
Accession Number: 00232392
Record Type: Component
Abstract: PROPERTIES OF LOESS SOILS ARE STUDIED FOR AN UNDERSTANDING OF STABILIZATION INVOLVING CEMENTING REACTIONS. MECHANICAL ANALYSES WERE PERFORMED ON FOUR LOESS SAMPLES BY HYDROMETER AND PIPETTE METHODS. SODIUM METAPHOSPHATE WAS USED AS THE DISPERSING AGENT. MINERALOGICAL COMPOSITION WAS DETERMINED BY SILT AND CLAY FRACTIONS. EXTENSIVE CHEMICAL TESTS WERE PERFORMED AS FOLLOWS: (1) CATION EXCHANGE CAPACITY USING AN AMMONIUM ACETATE METHOD, (2) EXCHANGEABLE CATIONS DETERMINED WITH A FLAME PHOTOMETER, (3) PH, BY AN ELECTROMETRIC METHOD, (4) CARBONATE CONTENT EXPRESSED AS PERCENT CALCIUM CARBONATE BY A VERSENATE METHOD, (5) SULFATE CONTENT DETERMINED BY WATER-SOLUBLE SULFATE METHOD, (6) CHLORIDE CONTENT DETERMINED BY MOHR'S METHOD, (7) FREE IRON OXIDE CONTENT, BY JEFFRIES' METHOD (8) TOTAL IRON CONTENT, AND (9) ORGANIC MATTER CONTENT DETERMINED BY A DICHROMATE OXIDATION METHOD. PARTICLE-SIZE ACCUMULATION CURVES FOR THE LOESS SAMPLES WERE DETERMINED BY PETROGRAPHIC ANALYSIS. MICROSCOPIC EXAMINATION OF THE LOESS REVEALED THAT CLAY OCCURRED MAINLY AS COATINGS ON LARGER GRAINS, WHICH TENDS TO INCREASE THE EFFECTIVENESS OF THE CLAY. DATA ARE PRESENTED ON THE SPHERICITY AND ROUNDNESS OF SILT GRAINS. SOIL-MECHANICS TESTS WERE PERFORMED TO GIVE INFORMATION OF SOME OF THE BEHAVIOR CHARACTERISTICS OF LOESS. SOIL CEMENT STABILIZATION IS DISCUSSED FROM THE BASIS OF CEMENT REQUIREMENTS, WEATHERING, AND MINERAL SURFACE AREAS. STABILIZATION OF SOIL CEMENT WITH TREATMENTS OR ADMIXTURES WERE ALSO INVESTIGATED. POSSIBLE EXPLANATIONS FOR VARIOUS QUESTIONS INVOLVING STABILIZATION OF LOESS WITH PORTLAND CEMENT ALONE AND WITH ADMIXTURES HAVE BEEN SUGGESTED. PETROGRAPHIC INFORMATION IS CONCLUDED TO BE ESSENTIAL ON A SOIL MATERIAL FOR AN UNDERSTANDING OF STABILIZATION INVOLVING CEMENTING REACTIONS.
Supplemental Notes: No 98, pp 1-20, 22 FIG, 11 TAB, 24 REF, 4 APP. 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 Title: Monograph Accession #: 01410502
Language: English
Authors: Handy, R LDavidson, D TChu, T YPublication Date: 1955
Serial: Media Type: Digital/other
TRT Terms:
Analysis; Carbonates; Cation exchange; Clay; Dispersers; Flame photometry; Hydrometers; Iron oxides; Loess; Mechanical analysis; Mineralogy; Organic content; Petrography; pH value; Phosphates; Portland cement; Properties of materials; Sodium compounds; Soil cement; Soil components; Soil mechanics; Soil stabilization; Soil tests; Soils
Uncontrolled Terms: Old TRIS Terms: Subject Areas: Geotechnology; Highways; Materials
Files: TRIS, TRB
Created Date: Aug 15 2004 2:43AM
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