Presentation Transcript
Slide1 : SUBGRADE STABILITY
and
LIME TREATMENT APPLICATIONS at OMP Marshall Thompson, P.E.
Professor Emeritus – CE
University of IL @ U-C
Slide7 : SUBGRADE SOIL PROPERTIES
* STRENGTH (CBR/QU)
* MODULUS
* RUTTING RESISTANCE
Slide10 : 0.5 INCH / CBR -6 0.5-INCH RUT / CBR - 6
Slide12 : SOIL COMPACTION
Slide13 : MATERIAL COMPACTION
Slide14 : MATERIAL COMPACTION
Slide19 : MOISTURE – DENSITY - CBR UofIL / IDOT PROCEDURE
COMPACT MOLD
CBR ON “FINISHED” MOLD
Slide34 : IMPROVED MATERIAL COVER REQUIREMENTS
Slide35 : CE CONE PENETROMETER
Slide36 : CBR = CI / 40
Slide38 : LOG (CBR) = 0.84 – 1.26 LOG (PR)
PR – Penetration Ratio (inches/blow)
Automated Dynamic Cone Penetrometer (ADCP) : Automated Dynamic Cone Penetrometer (ADCP) University of Illinois ADCP with
its data acquisition system
Slide51 : MOISTURE – DENSITY CONTROL
DIFFICULTIES DRYING EFFORTS = ???
DRYING DAY = ???
(TEMP / ET)
# DRYING DAYS ??
Slide52 : MOISTURE CONTROL
IS
TEMPORARY SOLUTION!!!!!
Slide53 : “EQUILIBRIUM” CONDITIONS
Slide55 : LIME PRODUCTS
Slide56 : LIME PRODUCTION
(RAW MATERIALS) CALCITE: CaCO3
DOLOMITE: Ca CO3 . MgCO3
Slide59 : QUICKLIME (QL) FINES SOME QL PARTICLE SIZES ARE << SMALL FOR HYDRATION
PRODUCT = QL FINES
Slide60 : LIME KILN DUST (LKD) FINELY-DIVIDED “DUST” FROM
THE KILN STACKS
Slide61 : LKD COMPOSITION
Some Kilns (15-20%) QL + “INERT MATERIAL” INERT MATERIAL (50-70%)
+ SiO2
+ Al2O3
+ Calcite / Dolomite
Slide65 : CATION EXCHANGE
FLOCCULATION & AGGLOMERATION RAPID REACTION !!!!! ALL FINE-GRAINED SOILS
WITH SIGNIFICANT CLAY!!
Slide67 : NOT ALL FINE-GRAINED SOILS ARE
“LIME REACTIVE” !!!!
Slide68 : UNDESIRABLE !!!!!!
Slide69 : IMMEDIATE EFFECTS
Slide70 : A-6 (11)
Slide72 : FLANAGAN-B
36% CLAY
PI –21
HOSMER-B
30% CLAY
PI-22
Slide77 : CURING EFFECTS
Slide78 : CURING @ ~72°F
Slide83 : CHECK MT. CARMEL
SAND & GRAVEL VIDEO
(CONSTRUCTION PROCESS)
Slide85 : OMP SOIL SAMPLES
* 61 BUCKETS
* % CLAY RANKING
(CHECK PI / CARBONATES)
* VISUAL INSPECTION
* SELECTED BUCKETS
(FOUR GROUPS)
Grouping Of Soils : Grouping Of Soils
Slide88 : LIME LAB TESTING PROGRAM
M-D-CBR (0 & 5% LIME)
QU (0 & 5% LIME)
(48-HOURS @ 12O°F)
RESILIENT MODULUS (0 & 5% LIME)
LIME TYPE EFFECT
% LIME EFFECT
Slide89 : LIME PRODUCTS
TYPE:
QUICKLIME FINES
LIME KILN DUST (LKD)
SOURCE:
BUFFINGTON, IN
SOUTH CHICAGO, IL
Moisture-Density Results for Group 2 Soils : Moisture-Density Results for Group 2 Soils
CBR Results for Group 2 Soils : CBR Results for Group 2 Soils
Slide92 : BEST OPTION
LIME TREATMENT
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