Plant Tech 2021 2.2

Which tests can we use to determine asphalt content?

• T308

• T11

• T164

• T84

What does filter aid do in a solvent extraction?

• Dries the filter

• Clumps dust into larger particles

• Enlarges the openings in the filter

• Helps dust stick to the coarse aggregate

DAR is...?

• The ratio of -#200 materials to the binder content

• The ratio of the binder content to +#200 materials

• The ratio of -#50 materials to the binder content

• The ratio of -#4 materials to the binder content

If utilizing an ignition furnace in lieu of an asphalt extractor...

• The correction factor for each mix must be verified each month

• The correction factor for each mix must be verified each week

• The correction factor for the furnace must be verified annually

• The correction factor for the binder must be verified quarterly.

After preparing the mixture per T308 requirements, you place a 2000 g sample of HMA with a known asphalt content of 5% into an NCAT oven and set the correction factor to 0. The printed ticket from the oven says the AC content is 5.3% What happened?

• the extra 0.3% is likely dust and was sucked up the flume

• The oven is broken

• The extra 0.3% was likely water lost as vapor.

• The extra 0.3% was anti-strip agent and burned off.

Stripping in asphalt is:

• The yellow or white lines on the pavement.

• The breakdown of binder-aggregate bond due to water intrusion

• The loss of binder coating on the surface due to vehicular traffic.

• impossible because TDOT requires ASA or Lime.

A scale has an allowable tolerance 0.5% accuracy. You load a dump truck to a precise 20 tons total weight. The scale reads 22.3 tons... (choose the best answer)

• The scale is off by about 12%

• The scale is off by about 11%

• The scale is off by exactly 11.5%

• Fix the scale, it is way out of spec!

A TDOT B mix is:

• A surface mix

• A base mix

• A binder mix

• A scratch mix

JMF means?

• The original meaning of the acronym was lost to time when the first TDOT headquarters burned to the ground in 1931.

• Job Mix Formula

• Just Mix Finely

• Jarl Magnus Fältskog, the inventor of asphalt.