00232606

Component

http://onlinepubs.trb.org...s/hrr/1968/255/255-003.pdf

A SOIL-CEMENT BASE IS SOMETIMES USED IN AN ATTEMPT TO IMPROVE THE LOAD SPREADING ABILITY OF THE BASE AND THEREFORE REDUCE THE STRESS LEVEL ON THE SUBGRADE. HOWEVER, ONE OF THE PROBLEMS ASSOCIATED WITH THE USE OF SOIL-CEMENT STABILIZED BASES IS THAT IN SOME INSTANCES HYDRATION OF THE CEMENT PASTE RESULTS IN THE FORMATION OF TRANSVERSE AND LONGITUDINAL SHRINKAGE CRACKS IN THE BASE. IF THESE SHRINKAGE CRACKS IN THE BASE BECOME SUFFICIENTLY WIDE, REFLECTION CRACKING WILL APPEAR ON THE SURFACING. IN ADDITION, A BASE COURSE THAT HAS CRACKED DOES NOT HAVE THE LOAD SPREADING ABILITY OF AN INTACT BASE SINCE THE CRACKED BLOCKS OF THE BASE ACT TO SOME DEGREE INDEPENDENTLY OF EACH OTHER. THE USE OF EXPANSIVE CEMENTS INSTEAD OF REGULAR PORTLAND CEMENT IS A NEW APPROACH TO THE PROBLEM OF CONTROLLING SHRINKAGE CRACKS IN SOIL-CEMENT STABILIZED BASES. SOME OF THE RESULTS ARE PRESENTED OF A LABORATORY STUDY PERFORMED TO DETERMINE IF ANY BENEFITS FROM THE STANDPOINT OF CRACKING RESULT FROM USING AN EXPANSIVE CEMENT AS COMPARED TO USING TYPE I PORTLAND CEMENT. THE SOIL INVESTIGATED WAS A CLAYEY, MICACEOUS SILTY SAND TYPICAL OF MANY OF THE RESIDUAL SOILS FOUND IN THE UPPER SOIL HORIZON OF THE PIEDMONT AREA OF GEORGIA. /AUTHOR/

Paper sponsored by Committee on Soil-Portland Cement Stabilization and presented at the 47th Annual Meeting. 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

01410198

English

pp 30-41

1968

Highway Research Record

Print

Figures (9) ; References (4) ; Tables (1)

Alternatives analysis; Base course (Pavements); Bearing capacity; Cement treated soils; Clay; Cracking; Expansive cement; Hydration; Pastes; Portland cement; Reflection cracking; Residual soils; Sand; Shrinkage; Silts; Soil cement; Soil stabilization; Stabilized materials

Cement treated bases

Geotechnology; Highways

TRIS, TRB

Aug 15 2004 2:44AM

• CRACKING IN CEMENT-TREATED BASES AND MEANS FOR MINIMIZING IT
• EFFECT OF COMPACTION METHOD ON STRENGTH PARAMETERS OF SOIL- CEMENT MIXTURES
• EFFECT OF PORTLAND CEMENT TREATMENT OF CRUSHED STONE BASE MATERIALS AS OBSERVED FROM TRIAXIAL SHEAR TESTS
• Laboratory Freeze-Thaw Tests of Portland Cement-Treated Granular Bases
• SHRINKAGE CHARACTERISTICS OF SOIL-CEMENT MIXTURES