00670359

Component

http://onlinepubs.trb.org...trr/1994/1440/1440-002.pdf

https://scholar.google.co...adam&publication_year=1994

The performance of a compacted, aggregate-free, cement-stabilized fly ash base beneath a highway shoulder is described. A 2.7-m (9-ft) wide, 457.5-m (1,500-ft) long fly ash test section was placed on both sides of State Highway M-54 near Grand Blanc, Michigan, in May 1987. The test section base was constructed using a high carbon, Class F fly ash that was stabilized with 12% by weight portland cement. A number of tests were used to monitor and evaluate the performance of the base. These tests included (a) Clegg impact readings on the compacted surface of the fly ash, (b) moisture-density and unconfined compression tests on core samples, (c) elevation and vertical deflection measurements on the pavement, (d) edge break surveys, (e) a crack pattern analysis, and (f) leachate analyses. The results of monitoring and evaluation tests conducted to date show that in general the fly ash test section has held up reasonably well where design and compaction specifications have been met. No widespread major problems (e.g., crumbling, disintegration, excessive heave or settlement of the pavement) have occurred during the 5-year period since construction in these areas. Problems with heave and cracking of the pavement on top of the fly ash have so far been restricted to a few local areas. Heaving and cracking in these areas occur mainly during the winter and are associated with frost effects. The presence of a joint that was purposely cut in the surface wearing course between the road shoulder and traveled way on one side of the highway greatly exacerbated arcuate cracking that developed next to the joint.

This paper appears in Transportation Research Record No. 1440, Design and Performance of Stabilized Bases, and Lime and Fly Ash Stabilization. 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

01401273

English

p. 8-15

1994

Transportation Research Record

Figures (10) ; Photos (2) ; References (5) ; Tables (1)

Base course (Pavements); Cement treated soils; Core samples; Cracking; Crash tests; Deflection; Fly ash; Frost susceptibility; Leachate; Materials tests; Pavement cracking; Pavements; Performance evaluations; Road shoulders; Soil cement; Test sections; Wet density

Heaving; Patterns

Geotechnology; Highways; Pavements; Research; I42: Soil Mechanics

TRIS, TRB

Nov 30 1994 12:00AM

• CEMENT-STABILIZED OPEN-GRADED BASE STRENGTH TESTING AND FIELD PERFORMANCE VERSUS CEMENT CONTENT
• DEEP-SLOPE STABILIZATION USING LIME PILES
• DRAINED SHEAR STRENGTH OF LIME-CLAY MIXES
• ESTIMATING THE DESIGN LIFE OF A PROTOTYPE CEMENT-STABILIZED PHOSPHOGYPSUM PAVEMENT
• FIELD PERFORMANCE EVALUATION OF CEMENT-TREATED BASES WITH AND WITHOUT FLY ASH
• HIGH-STRENGTH STABILIZED BASE THICKNESS DESIGN PROCEDURE
• LIME AND FLY ASH ADMIXTURE IMPROVEMENT OF TROPICAL HAWAIIAN SOILS
• LONG-TERM PERFORMANCE OF FLEXIBLE PAVEMENTS LOCATED ON CEMENT-TREATED SOILS
• SELECTION OF DESIGN STRENGTHS OF UNTREATED SOIL SUBGRADES AND SUBGRADES TREATED WITH CEMENT AND HYDRATED LIME