From Pavement Interactive

Contents 1 Nick Running's User Page 1.1 Assignments 1.1.1 Construction Site Safety Training 1.1.2 Assignment 2 1.1.3 Assignment 3 1.1.3.1 Part 1 1.1.3.2 Part 2 1.1.4 Assignment 4 1.1.5 Assignment 5

Nick Running's User Page

My name is Nick Running and I am currently a Civil Engineering masters student at the University of Washington focusing in Transportation.

Assignments

Construction Site Safety Training

Assignment 2

Introduction to Hot Mix Asphalt Training Course

Paver Handwork Training Course

Paver Operations Training Course

Environmental Awareness Training Course

Assignment 3

Part 1

Current Weather Conditions in Ellensburg, Washington

Calculated MultiCool results

Graphical Output of Results

• From running the program i found that with using today's weather the time available for compaction is 10 minutes.
• This time does not seem very reasonable. It is possible that the pavement could be compacted in time but it would require a lot of coordination in order to make it work. I would be much more confident waiting for warmer temperatures to complete the paving.

Part 2

Current Weather Conditions in Kailua, Hawaii

Calculated MultiCool results

Graphical Output of Results

• Compaction time available in this situation is 23 minutes.
• The most significant factors that I observed were the temperature of the location and the temperature of the HMA when it is placed. Just by moving the temperature up to 290 degrees from the Ellensburg placement increased our compaction time 50%. Outside air temperature and ground temperature also have a big factor in the time needed.
• The temperature in the location you are paving is not totally controllable. Dates can be picked for paving biased on estimates of the weather conditions, but these are never 100% accurate. Temperature of the HMA during placement can be controlled by making sure that trucks are correctly sequenced so they are not sitting around the job-site with full loads in the trailer.

Assignment 4

Superpave 3/4" Blend from Quarry

Superpave 1/2" Blend from Quarry

SMA blend from Quarry

• SMA blend cannot be achieved from the current stockpile from the quarry.

Superpave 3/4" Blend from Glacier Northwest

Superpave 1/2" Blend from Glacier Northwest

SMA blend from Glacier Northwest

Assignment 5

Results from paving normal day

time series of all paving hours

• The pavement from the normal august day under 90% reliability will most likely not crack. Also the pavement will be ready to be drive on by 43 hours.
• The time series graph shows that you can pave during any time during the day and the slab will not crack.

Results from paving in 100oF day

time series of all paving hours in 100oF

• The pavement from the 100^oF day will break around the 12th hour. It will also not be open in the first 72 hours.
• The main problem is because when the concrete is put down the temperature is very high. Later when the temperature drops the concrete builds more stress and because it has not gained strength quickly enough, it breaks.
• By curing the concrete with burlap for 65 hours I was able to make sure that the concrete would most likely not break. Even with this situation it was still very close to breaking. By looking at the time series analysis we can see that during these conditions it might just be best to pave at night.