Call number:
ZSP-201-78/12
In:
CRREL Report, 78-12
Description / Table of Contents:
Road test sections of membrane-enveloped silt and clay soils overlain with asphalt cement concrete were subjected to repetitive dynamic plate-bearing loadings to determine their strength variations during freeze-thaw cycles. The recoverable surface deformations in the load deflection bowl were continuously measured during the loading cycles and analyzed using the Chevron layered elastic computer program to obtain the in situ resilient deformation modulus of the various section layers at different stages of the freeze-thaw cycles. The resilient stiffness of the pavement system (the total load per unit of resilient load plate deflection) was also calculated for the various freeze-thaw conditions. The modulus values of the asphalt cement concrete varied inversely with its temperature by an order of magnetide (90,000 psi to 1,300,000 psi). The resilient stiffness of the pavement system varied in the same manner by nearly a factor of eight (228.4 kips/in. to 1740.2 kips/in.). Despite the wide strength variations of the sections during freeze-thaw cycles, membrane-enveloped fine-grained soils can be utilized instead of granular materials as base and subbase layers in flexible pavements in cold regions where moisture migration is a major concern. Moisture migration did not occur at saturation levels up to 75%, thus there was no strength loss during thawing.
Type of Medium:
Series available for loan
Pages:
v, 24 Seiten
,
Illustrationen
Series Statement:
CRREL Report 78-12
URL:
https://hdl.handle.net/11681/9404
Language:
English
Note:
CONTENTS
Abstract
Preface
Conversion factors: U.S.customary to metric units of measurement
Introduction
Freeze-thaw system
Construction materials
Controlled environment test section
Outdoor sections
Temperature monitoring instrumentation
Repetitive plate bearing test apparatus
Test results and analyses
Conclusions
Literature cited
Location:
AWI Archive
Branch Library:
AWI Library
