Asphalt Pavement Analyzer Junior (APA Jr.)

Asphalt Pavement Analyzer Junior (APA Jr.) – Pavement Testing Machine

The Asphalt Pavement Analyzer Junior (APA Jr.) is a two-wheel Asphalt Wheel Tracker to determine rutting, fatigue cracking and moisture susceptibility of hot or cold asphalt paving mixes in dry or submerged conditions. Asphalt beams are typically compacted using an asphalt vibratory compactor to ensure reliable results during rutting tests. This versatile CE-approved model from Pavement Technology has a small footprint and meets all requirements for the AASHTO T324 Hamburg Wheel Tracking Test and AASHTO T340 Rut Test. The APA can also be equipped to perform other tests such as high contact pressure testing for airport runways and taxiways, micro surfacing/slurry seal testing and low-temperature fatigue and studded wheel tests with the optional Chiller. The APA Jr. can be equipped with a cold plate for low-temperature fatigue testing on beam specimens, making it very versatile. The unique frequency drive of the APA Jr. allows mixes to be tested at multiple speeds and loading rates.

A sample holding assembly precisely positions the specimens in molds under the wheels for testing. A series of heating elements and the optional Chiller control the heating and cooling of the main chamber, from -9° to 80°C (15° to 176°F). A 15gal (57L) stainless steel water tank circulates temperature controlled water to the reservoir, which maintains water levels about 1/2in over the specimens during the test. Temperature can be maintained up to 80°C (176°F). Vertical measurements are taken with linear position transducers and rut depth is measured with transducers inside the pneumatic cylinders.

The APA Jr. has a PLC-based control system, operated through the user’s laptop or PC, to control all calibration and operational functions. Data is plotted and displayed in numeric and graphical format. The APA Jr. can test multiple cylindrical samples at the same time during different tests. The APA Jr. gives good correlation for different mixes and rutting performance. Five or more measurements on a beam and three or more on a cylindrical specimen are taken in each pass and the data is calculated to 0.00001mm. The wheel tracking assembly can run from 0 to 60 cycles (120 passes) per minute, with stroke and speed adjustable for Hamburg Testing. Wheel loading is applied through independent pneumatic cylinders. Four UHMW plastic cylindrical molds are included with the APA Jr., two 150x62mm Dia.xH for Hamburg Tests and two 150x75mm Dia.xH for Rut and Moisture Damage Tests. The molds can accommodate Gyratory, Marshall, Hveem or core specimens. The Jr. comes with sets of wheels and molds for different tests. The Los Angeles Abrasion Machine can test coarse aggregates for abrasive resistance. The durability test and abrasion testing machine can test multiple samples at the same time. Two Hamburg-type wheels and two APA concave wheels, each made of stainless steel are included with high-pressure hoses. Additional beam-type molds and wheels for studded wheel, slurry seal and fatigue tests are available.

The APA Jr. can test various test specimens under controlled conditions. The Jr. can collect multiple measurements over time, optimize testing speed with adjustable cycles. A source of clean, dry compressed air at 120psi (8.3bar) and 8CFM (226LPM) is required. Electrical requirements are 208 or 230V/50-60Hz, 40A single phase.

Other Features:

• Meets all requirements for AASHTO T 324 Hamburg Wheel Tracking Test and AASHTO T 340 Rut Test

• Adaptable for high-contact pressure testing for airport runways and taxiways, microsurfacing/slurry seal testing and low-temperature fatigue and studded wheel tests

• Consistent regulation of main chamber temperature from -9° to 80°C (15° to 176°F) with optional Chiller

• Streamlined PLC-based control system maintains all calibration and operational functions via user’s laptop PC

Included Items:

• Asphalt Pavement Analyzer Junior

• PLC-Based control system operated via user’s laptop

• Two 150x62mm UHMW Cylindrical Molds for Hamburg Tests

• Two 150x75mm UHMW Cylindrical Molds for Rut and Moisture Damage Tests

• Two Stainless Steel Hamburg Solid Wheels

• Two Stainless Steel APA Concave Wheels

• Two High Pressure Hoses

• Concrete Compressive Strength Testing Machine for essential quality control in construction

Introduction

The Asphalt Pavement Analyzer (APA) is a dual-wheel asphalt wheel tracker to test Cold Mix, Warm Mix and Hot Mix asphalt in wet and dry conditions. Required in Virginia and North Carolina, the Jr. is a must-have for asphalt testing in these regions. The Jr. can be added to any order and is a complete asphalt testing solution. With multiple speed and load rates, the Jr. is used to evaluate rutting, fatigue cracking and moisture susceptibility of various asphalt mixes.

Pavement Technology

Pavement Technology Inc. is located in Covington, Georgia and is a leading manufacturer of asphalt and aggregate testing equipment. Founded in 1996, the company has established itself as a specialist in delivering high quality products to meet the evolving needs of the asphalt industry. Pavement Technology Inc. is committed to integrity, entrepreneurial spirit and sustainable growth to ensure our customers have the best solutions for their business.

Asphalt Solutions

Pavement Technology Inc. provides asphalt solutions to the industry. Our products, the APA and Jr. perform rutting, fatigue cracking and moisture susceptibility tests. These tests are critical to evaluate the quality and durability of asphalt mixes to meet specifications. With the APA and Jr. you can prepare and test samples, beam specimens and cylindrical specimens under various loading and temperature conditions. Our approach to asphalt testing has made us a trusted partner for companies looking to upgrade their asphalt testing capabilities.