Title
Monitoring of strength development in Portland cement concrete with high fly-ash content at the FAA's national airport pavement test facility
Date Issued
01 December 2008
Access level
metadata only access
Resource Type
conference paper
Author(s)
SRA International Inc.
Abstract
Construction Cycle 2 (CC2) at the FAA's National Airport Pavement Test Facility (NAPTF) included construction of three concrete test items MRC, MRG, and MRS on three different support conditions (crushed-stone subbase, slab on grade, and econocrete stabilized subbase). All three test items were constructed on a CBR 7-8 subgrade. The existing econocrete subbase (P-306) from CC1 test item MRS was used for CC2 MRS. Concrete was placed in the test items using a concrete pump into fully formed 15 ft. (4.57 m) by 15 ft. (4.57 m) slabs. Test results are presented and discussed in this paper. Test results include concrete placement details (slump, air content, concrete temperature), compressive strengths, flexural strengths, elastic modulus from free-free resonance tests on concrete beams and cylinders, portable seismic pavement analyzer (PSPA) tests, and strength results from sawed beams and cored cylinders taken from untrafficked test slabs. Concrete specimens included both laboratory cured and field cured specimens. PSPA tests were performed on the test item slabs at the age of one day and on regular intervals after that, coinciding with the laboratory testing of beams and cylinders. The test results showed good correlation between elastic modulus (from free-free resonance and PSPA tests) and strength values (compressive and flexural strengths) and demonstrated the application potential of a testing device such as PSPA for assessing the early-age strength of concrete.
Start page
300
End page
314
Volume
1
Language
English
OCDE Knowledge area
Ingeniería civil Ingeniería de la construcción
Scopus EID
2-s2.0-78149386026
Resource of which it is part
9th International Conference on Concrete Pavements: The Golden Gate to Tomorrow's Concrete Pavements
ISBN of the container
978-098406584-4
Conference
9th International Conference on Concrete Pavements: The Golden Gate to Tomorrow's Concrete Pavements
Sources of information: Directorio de Producción Científica Scopus