Details:

Creators:
Hansen, W. ; Jensen, E.A. ; Mohr, P.
Hansen, W. ; Jensen, E.A. ; Mohr, P. Less -
Corporate Creators:
University of Michigan
Corporate Contributors:
United States. Federal Highway Administration. Office of Research, Development, and Technology
Subject/TRT Terms:
[+]
Concrete Pavement Concrete Pavements Durability Higher Strength PCC High Strength Concrete LTPP Database Material Characteristics Pavement Performance Perpetual Pavements Physical Properties
Publication/ Report Number:
FHWA-RD-00- 16 1
Resource Type:
Tech Report
Geographical Coverage:
California;Georgia;Iowa;Michigan;Minnesota;Ohio;Wisconsin;Washington
Edition:
Final report; 1995-2000.
Contracting Officer:
Forster, Stephen W.
Corporate Publisher:
Turner-Fairbank Highway Research Center
NTL Classification:
NTL-HIGHWAY/ROAD TRANSPORTATION-Materials;NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance;NTL-HIGHWAY/ROAD TRANSPORTATION-Construction and Maintenance;
Abstract:
The major goal of this project was to develop recommendations for PCC properties and materials characteristics found

in higher strength JPCP's with improved long-term performance as determined by joint spalling and faulting, and

transverse slab cracking. Primary project variables were pavement age, climate, traffic (4 to 23 million ESALYs)d, istress

levels and types, joint spacing, and compressive strength. Fifteen PCP's were selected for detailed field and laboratory

investigation. The field compressive and tensile strengths (splitting) ranged from 33 to 75 MPa and from 3.1 to 4.5 MPa,

respectively.

Regular strength highway concrete with a design flexure strength of about 4.5 MPa can develop excellent long-term joint

spalling resistance provided that (1) good sub-surface drainage conditions are present, (2) the concrete reaches low

permeability level over time from additional curing (i.e. high resistance to physical and chemical deterioration from rapid '

chloride and water permeability test), (3) it has good entrained air void system (i.e. 6 to 8.5 percent), and (4) sound

aggregate are used in the concrete mix. Several different permeability tests were evaluated, and each showed a good

correlation with compressive strength. The compressive strength test is therefore a good indicator of the permeability

level. The range of low permeability can typically be achieved at a compressive strength range of 45 to50 MPa. Watercementitious

ratio was found to be the major mix feature controlling compressive strength. This requires a concrete mix

with a water-cementitious ratio of 0.42 to 0.45, a cement content of about 335 kg per m3 (6 sack mix typical for most

SHA's), and well-graded quality aggregate. Several aggregate characteristics of the concrete mix were found important to

achieve good long-term pavement performance. These included aggregate inertness with respect to AAR and F-T, and

strong and large sized coarse aggregate to ensure good cracking resistance and aggregate interlock. In addition, wellgraded

aggregate were beneficial in reducing the paste volume fraction. This results .in low coefficient of thermal

expansion and drymg shrinkage, which both are important properties for avoiding premature transverse cracking. Given

suflicient slab thickness, good long-term resistance to fatigue (transverse) cracking was found at any flexure strength level

of 4.5 to 6 MPa, provided that loss of slab support from pumping erosion was not a factor. Joint faulting was found to be a

consequence of factors causing pumping erosion and/or slab settlement and it was not affected by PCC strength level.

Prototype mix designs were developed for different climate regions.


Format:
PDF
Funding:
DTFH61-95-C-00108
Collection(s):
Federal Highway Administration US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:5445e28fdff254ca68982c70b3a90592d011449f31e871ddca8fd980dc339032
Download URL:
https://rosap.ntl.bts.gov/view/dot/25300/dot_25300_DS1.pdf
File Type:

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