Company just purchased a brand new Zimmerman Vol Mixer with the intent to mix rapid set concrete to use on highway project. Then the money people see the cost of rapid set material and want me to design a mix using Type III cement. I talked to a admix rep and the amount of liquid we will have...
Lot of new and old product out there that is cost effective for spall repairs on airfields. Like to hear some feed back or suggestion of a good product to use on apron of airfield. Spall repairs will be 4" depth and under 2sf each. Air field is hard to get pcc patches to last due to...
Looking at a project in Louisiana to replace slabs on a runway. Bottom is 8" PCC with 9" Pcc on top, joints match. Slabs are 12.5 x 20. They want to take out full depth and replace with 17" pcc slab. Question, how will this effect the movement of the slabs around the full depth replacement...
Question to all. What is the best method for patching small (spalls) patches on an concrete airfield. Givin the area does not have to be open in a hurry no extream weather conditions just the best fix for patches 3" in depth with an average area of 2-4 sf. I have used epoxy with clean...
Getting ready to place some Econocrete, Lean Mix. Spec calls for 1200 @ 28 day. If strength exceeds 1200 spec requires us to saw the joints in the econocrete. 28 day breaks came in at an average of 1130 psi. I was wondering if sawing the joints exactly on the same pattern that the 14" PCC...
Looking for some advice of a joint seal to use in existing concrete runway that will have a new AC Overlay to help prevent the joint reflective cracks from starting so soon. I know they will work thru over time, just trying to fix a bad design. Thanks SB
Just broks some 28 day breaks and all of them across the board fell from 12-20% from the 14day break. We are using good crushed stone from MO with wash sand Type I cement and 16% fly ash. Nothing special about the mix, looking for 750@ 28 days. All of the mix's had the strength at 14 days...
