Asphalt Bitumen

ROLLING THIN FILM OVEN

Rolling thin film ovens (RTFOs) are primarily used to simulate the short-term aging of asphalt binders. This is achieved by exposing a thin film of the binder to high temperatures and airflow, mimicking the aging process that occurs during asphalt production and paving. The RTFO test helps engineers predict how asphalt will behave under real-world conditions, including its resistance to oxidation, volatility, and other changes that can affect pavement performance. 

Here’s a more detailed explanation:
  • Simulating Short-Term Aging:
    The RTFO test exposes asphalt binder to elevated temperatures (typically 163°C or 325°F) while continuously rotating the sample in thin films. This process mimics the oxidative aging that occurs during hot mix asphalt (HMA) production and application. 

  • Predicting Pavement Performance:
    By simulating short-term aging, the RTFO test allows engineers to predict how asphalt binder will perform under various conditions, including its resistance to cracking, rutting, and stripping. 

  • Importance in Asphalt Industry:
    The RTFO test is a crucial tool in the asphalt industry, used to assess the quality and performance of asphalt binders before they are used in paving projects. 

  • Key Applications:
    The RTFO test is used to:

    • Determine the resistance of asphalt binders to hardening under the combined effects of heat and air. 
    • Investigate and predict the early age behavior and distress of HMA pavements. 
    • Ensure that asphalt binders meet required specifications for durability and performance. 

 

Specifications:

~Epoxy coated steel exterior

~ Grade 304 stainless steel interior

~ Insulated all round with 50mm glass wool

~Front door hinged with cam lock handle

~With high temperature silicone rubber door seal around door

~ Interior uses series of internal baffle plates with forced air circulation

~With exhaust vent and hole for thermometer

~ Circular carriage to hold 8 sample jars

~ Supplied with flow meter

~ Oven to conform with ASTM D2872188 Test Standard

~ Brass tubes and rollers available as optional extra

~ Glass tubes available as optional extra