Field Investigation Of Subgrade Non Uniformity Effects On Concrete Pavement
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Base Compaction Specification Feasibility Analysis
Author | : |
Publisher | : |
Total Pages | : 148 |
Release | : 2012 |
Genre | : Aggregates (Building materials) |
ISBN | : |
The objective of this research is to establish the technical engineering and cost analysis concepts that will enable WisDOT management to objectively evaluate the feasibility of switching construction specification philosophies for aggregate base. In order to accomplish this goal, field and laboratory testing programs were conducted on existing HMA pavements and on base layers under construction as well as comprehensive survey was conducted on highway agencies practices pertaining to base layer construction in the U.S. and Canada. This research proposed construction specifications for aggregate base course layers.
Final Report on Concrete Pavement Investigations at Hamilton Field
Author | : United States. Army. Corps of Engineers. San Francisco District |
Publisher | : |
Total Pages | : 292 |
Release | : 1946 |
Genre | : Hamilton Air Force Base (Calif.) |
ISBN | : |
Influence of Subgrade Improvement and Non-uniformity on Pavement Performance
Author | : Tyson David Rupnow |
Publisher | : |
Total Pages | : 548 |
Release | : 2004 |
Genre | : |
ISBN | : |
This thesis contains results from three projects describing self-cementing fly ash stabilization of RAP-soil mixtures, stabilization of limestone screenings for use as a structural layer in road construction, and finite element modeling results of various subgrade materials including self-cementing fly ash stabilized subgrade, natural subgrade, granular subbase, and hydrated fly ash. The first project shows that self-cementing fly ash stabilization of RAP-soil mixtures is economically feasible and structurally capable of supporting construction traffic. The increase stiffness from the addition of self-cementing fly ash increases capacity ensuring long term pavement performance. Addition of self-cementing fly ash increases the consolidated shear strength about five times. The second project shows construction operations and field results proving that stabilization of limestone screenings is viable, cost effective, and produces an adequate structural layer for road construction. The measured moisture-density curves for manufactured sand and limestone screenings are about the same, and the moisture-strength curves show a dramatic decrease in strength beyond the optimum moisture content for strength. Durability testing concluded that CKD stabilized manufactured sand and limestone screenings are not viable construction alternatives, and the addition of class C fly ash with CKD significantly increased the durability of the mixtures. The third project concluded that a link exists between subgrade non-uniformity and pavement performance. Field testing, with the DCP, Clegg Impact Hammer, nuclear density gauge, and GeoGauge, and statistical analysis of subgrade materials concluded that granular subbase, self-cementing fly ash treated subgrade, and HFA decrease the variability of field results. Finite element modeling analysis proved that a link exists between subgrade non-uniformity and pavement performance. Uniform modeling conditions produced lower average deflections and stresses increasing pavement life. Statistical analysis concluded that modeling uniform subgrade conditions produce average stresses that have less variability than those for non-uniform modeling conditions. Pavement response reliability increased with the addition of uniform subgrade, proving that subgrade non-uniformity influences pavement performance.
Technical Report
Author | : Cold Regions Research and Engineering Laboratory (U.S.) |
Publisher | : |
Total Pages | : 618 |
Release | : 1951 |
Genre | : Frozen ground |
ISBN | : |
Journal of American Concrete Institute
Author | : American Concrete Institute |
Publisher | : |
Total Pages | : 810 |
Release | : 1926 |
Genre | : Concrete |
ISBN | : |
Each number includes "Synopsis of recent articles."
Proceedings
Author | : American Concrete Institute |
Publisher | : |
Total Pages | : 816 |
Release | : 1926 |
Genre | : Concrete |
ISBN | : |
Effects of Subsurface Drainage on Pavement Performance
Author | : Kathleen Theresa Hall |
Publisher | : Transportation Research Board |
Total Pages | : 201 |
Release | : 2007 |
Genre | : Pavements |
ISBN | : 0309099021 |
NCHRP Report 583 explores the effects of subsurface drainage features on pavement performance through a program of inspection and testing of the subsurface drainage features present in the Long-Term Pavement Performance SPS-1 (flexible hot-mix asphalt pavement) and SPS-2 (rigid portland cement concrete pavement) field sections.
The Structural Design of Concrete Pavements
Author | : United States. Public Roads Administration |
Publisher | : |
Total Pages | : 178 |
Release | : 1943 |
Genre | : Pavements, Concrete |
ISBN | : |