5837-16 - Running FWD test at slab edge Geophone positions...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
Evaluation of Concrete Pavements using the FWD - the Florida Experience • Challenge: Thermal gradients in the concrete may cause the FWD deflections to vary when tests were run at different times of the day. • Solution: Run FWD tests at times and locations where the concrete slabs will be in full contact with the subgrade. – Run FWD tests at the center of the slab at night, when the slab will have a negative temperature gradient and curl down at the center, and thus will have full contact at and near the slab center. Results of these tests are used to estimate the modulus of subgrade reaction. – Run FWD tests at the slab corner, edge and joint at midday, when the slab will a positive temperature gradient and will have full contact at the joints and edges. Results are used to estimate the edge and joint stiffnesses. FWD Load and Geophone Positions
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Running FWD tests at night Running FWD test at slab
Background image of page 2
Geophone positions for FWD test at slab center Comparison of Computed and Measured Deflection Basin for FWD Test at Slab Center
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Running FWD tests at midday
Background image of page 4
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 6
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 8
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 10
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Running FWD test at slab edge Geophone positions for FWD test at slab edge Comparison of Computed and Measured Deflection Basin for FWD Test at Slab Edge Running FWD test at slab corner Running FWD test at the joint Comparison of Computed and Measured Deflection Basins for FWD test at the joint Comparison of Computed and Measured Deflection Basins for FWD test at the joint Results of stress analyses using pavement parameters estimated from the FWD results Estimated pavement parameters and maximum computed stresses using FWD test results A Typical Pavement Section on I-75 in Sarasota and Manatee Counties in Florida Estimated Pavement Parameters for Test Sections on I-75 in Sarasota and Manatee Counties Maximum Computed Stresses for Test Sections on I-75 in Sarasota and Manatee Counties Test Sections 14 & 18 were in good condition. Test Section 15 had transverse cracks at the slab center in all of the 22-ft and 23-ft slabs. Section 15 on I-75 in Manatee County – Transverse Cracks across the center of slabs...
View Full Document

This note was uploaded on 05/26/2011 for the course TTE 5837 taught by Professor Staff during the Spring '11 term at University of Florida.

Page1 / 10

5837-16 - Running FWD test at slab edge Geophone positions...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online