00802462

Component

https://doi.org/10.3141/1716-12

http://scholar.google.com...Chen&publication_year=2000

The Texas Department of Transportation (TxDOT), in partnership with the Center for Transportation Research, has implemented the Texas mobile load simulator (TxMLS) as a tool for accelerated testing of in-service pavements. Although the TxMLS has been used successfully to test in-service pavements in the Yoakum and Fort Worth districts, the fact that only one TxMLS machine exists limits the number of accelerated pavement tests (APT) that can be performed. Therefore, TxDOT is evaluating a modification of the rolling dynamic deflectometer (RDD) for use as a super-accelerated pavement tester. In this application, the truck-mounted dynamic loading system is operated in a stationary mode, with the loading rollers and rolling sensors of the RDD removed from operation. The servohydraulic actuator is used for application of harmonic loading to a wheel footprint on the pavement surface. Hundreds of thousands of load repetitions are applied in a matter of hours; hence the designation as super-accelerated testing. This stationary dynamic deflectometer (SDD) is being studied as a possible tool for use in expanding TxDOT's APT program. The SDD may allow TxDOT to increase, in a cost-effective manner, the number of accelerated tests that can be performed. Preliminary tests have been performed with the TxMLS and SDD on two different pavement recycling strategies constructed on the northbound and southbound lanes of US-281 in the Fort Worth District. That the same conclusion was reached about the relative performance of the test sections with both machines indicates the potential usefulness of the SDD.

This paper appears in Transportation Research Record No. 1716, Pavement Assessment and Testing.

English

p. 98-107

2000

Transportation Research Record

0309066956

Figures (11) ; Photos (4) ; References (8)

Accelerated tests; Cost effectiveness; Flexible pavements; Technological innovations; Testing equipment

Texas Mobile Load Simulator

Stationary dynamic deflectometers; Super-accelerated testing

Texas

Highways; Pavements; I23: Properties of Road Surfaces

TRIS, TRB, ATRI

Nov 7 2000 12:00AM

• ACCELERATED PAVEMENT TESTING OF RUTTING PERFORMANCE OF TWO CALTRANS OVERLAY STRATEGIES
• BACKCALCULATION OF THERMALLY DEFORMED CONCRETE PAVEMENTS
• CURVILINEAR BEHAVIOR OF BASE LAYER MODULI FROM DEFLECTION AND SEISMIC METHODS
• DYNAMIC INTERPRETATION OF FALLING WEIGHT DEFLECTOMETER TEST RESULTS: SPECTRAL ELEMENT METHOD
• EFFECT OF MOISTURE ON MODULUS VALUES OF BASE AND SUBGRADE MATERIALS
• ESTIMATING SUBGRADE STIFFNESS AND BEDROCK DEPTH: COMBINED FALLING WEIGHT DEFLECTOMETER AND SIMPLIFIED SPECTRAL ANALYSIS OF SURFACE WAVES MEASUREMENTS
• EVALUATING MEASURED TIRE CONTACT STRESSES TO PREDICT PAVEMENT RESPONSE AND PERFORMANCE
• EVALUATING RUNWAY PAVEMENTS AT SEATTLE-TACOMA INTERNATIONAL AIRPORT: CONTINUOUS DEFLECTION PROFILES MEASURED WITH THE ROLLING DYNAMIC DEFLECTOMETER
• IT'S 10 O'CLOCK: DO YOU KNOW WHERE YOUR SENSORS ARE?
• PERFORMANCE OF SUPERPAVE MIXTURES UNDER ACCELERATED LOAD TESTING
• PERFORMANCE PREDICTION OF LOUISIANA ACCELERATED LOADING FACILITY TEST SECTIONS
• RUTTING OF THIN PAVEMENTS: FULL-SCALE STUDY
• TEMPERATURE CORRECTION ON FALLING WEIGHT DEFLECTOMETER MEASUREMENTS
• TRUCK TRAVEL TIME AROUND WEIGH STATIONS: EFFECTS OF WEIGH IN MOTION AND AUTOMATIC VEHICLE IDENTIFICATION SYSTEMS
• USING A ROAD SURFACE ANALYZER TO EXPLAIN NOISE CHARACTERISTICS OF PORTLAND CEMENT CONCRETE PAVEMENT SURFACE TEXTURE
• USING TRANSVERSE PROFILE DATA TO COMPUTE PLASTIC DEFORMATION PARAMETERS FOR ASPHALT CONCRETE PAVEMENTS