Abstract:
THREE SOILS, A WISCONSIN DRIFT SOIL, AN ILLINOIAN DRIFT SOIL AND A RIVER TERRACE GRAVEL, WERE TESTED WITH ADDITIONS OF 0, 2, 5, AND 10 PERCENT LIME. AFTER FABRICATION, THE SPECIMENS WERE PERMITTED TO "CURE" IN A MOIST ROOM FOR PERIODS OF 1, 4, 8, 15 AND 36 WEEKS. COMPANION SPECIMENS WERE MADE IN ALL CASES. AT THE END OF THE CURING PERIOD, ONE OF THESE WAS BROKEN IN UNCONFINED COMPRESSION TO DETERMINE THE EFFECT OF LIME UPON STRENGTH. THE OTHER WAS SUBJECTED TO FREEZING AND THAWING, A 48-HOUR CYCLE BEING EMPLOYED, UNTIL IT FELL APART OR UNTIL 12 CYCLES HAD ELAPSED. THE SPECIMENS WERE TESTED AT THE END OF EACH CYCLE WITH THE SONISCOPE. RESULTS OF THIS INVESTIGATION INCLUDE: (1) TWO PERCENT LIME IS INSUFFICIENT TO AFFECT APPRECIABLY THE PERFORMANCE OF THE SOILS TESTED; (2) FIVE PERCENT LIME, OR MORE, SIGNIFICANTLY INCREASED BOTH STRENGTH AND DURABILITY OF THESE SOILS; (3) INCREASED LENGTH OF CURING BEFORE TESTING WAS, IN GENERAL, BENEFICIAL; (4) OF THE SOILS TESTED, THE GREATEST BENEFITS OF ADDING LIME WERE DERIVED BY THE RIVER TERRACE GRAVEL AND THE LEAST BY THE WISCONSIN DRIFT SOIL; (5) THE DYNAMIC TEST EMPLOYED IS ADEQUATE AS A MEASURE OF PROGRESSIVE DETERIORATION. /AUTHOR/
Supplemental Notes:
Vol 31, pp 529-540, 6 FIG, 8 TAB, 2 PHOT, 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.
