00232431

Component

http://onlinepubs.trb.org...rbbulletin/262/262-004.pdf

THE USE OF HYDRATED LIME HAS BEEN GROWING IN THE FIELD OF SOIL STABILIZATION. ALTHOUGH IT HAS BEEN USED FROM COAST TO COAST IN THE UNITED STATES AND BY SOME NATIONS ABROAD, THE REACTION OF HYDRATED LIME WITH THE SOIL IS STILL A MYSTERY, PARTICULARLY WITH RESPECT TO ITS RELATIVE EFFECTIVENESS AND RATES OF REACTION WITH VARIOUS SOILS. A RESEARCH PROJECT TO DETERMINE THE REACTION OF HYDRATED LIME AND SOIL IS UNDER WAY AT THE UNIVERSITY OF ILLINOIS. BECAUSE OF THE COMPLEXITY OF SOILS AND BECAUSE LIME IS OF GREATER BENEFIT TO A HEAVY CLAY SOIL, THE FIRST PART OF THE INVESTIGATION HAS BEEN DEVOTED TO A STUDY OF THE EFFECTS OF HYDRATED LIME ON PURE CLAY MINERALS. BY THE AID OF X-RAY DIFFRACTION AND DIFFERENTIAL THERMAL ANALYSIS, IT HAS BEEN POSSIBLE TO WATCH AND IDENTIFY THE REACTIONS WHICH TAKE PLACE. THE FIRST REACTION, WHICH IS BROUGHT ABOUT IMMEDIATELY WHEN LIME IS ADDED, IS REPLACEMENT OF ABSORBED IONS BY CALCIUM IONS, THE SECOND, FORMATION OF A SERIES OF NEW MINERALS, THE THIRD, CARBONATION OF THE HYDRATED LIME. THESE REACTIONS, ILLUSTRATED BY TYPICAL X-RAY EXAMPLES, OFFER DEFINITE PROOF AS TO WHY DIFFERENT RATES OF REACTION OCCUR WITH DIFFERENT SOILS. /AUTHOR/

No 262, pp 51 - 63, 8 FIG, 9 REF 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

01410649

English

13p

1960

Highway Research Board Bulletin

Digital/other

Calcium hydroxide; Chemical reactions; Clay; Differential thermal analysis; Diffraction; Kinetics; Minerals; Motor reactions; Rates; Soil stabilization; X rays

X-ray diffraction

Geotechnology; Highways

TRIS, TRB

Aug 15 2004 1:56AM

• Improvement of Lime Stabilization of Montmorillonitic Clay Soils with Chemical Additives
• LIME FIXATION IN CLAYEY SOILS
• LIME STABILIZATION USING PRECONDITIONED SOILS
• RECENT SOIL-LIME RESEARCH AT THE MASSACHUSETTS INSTITUTE OF TECHNOLOGY