Case Study
| Title: | DOTLine Repair on Escondido Parkway on 14 freeway Bridge Crew |
| Purpose: | Demonstrate DOTLine material to District 7 North Bridge Crew |
| Location: | Escondido Parkway exit bridge over the 14 Freeway in Palmdale |
| Date: | October 3, 2007 |
Procedure & Observations:
Ceratech personnel visited the repair to demonstrate DOTLine material.
Product Placement:
The ambient temperature was about 88 degrees and the water was 74 degrees. We saw cut around the repair. We blew out the area with compressed air and removed all the loose concrete. Caltrans shot blasted the rebar to get to white metal. The depth of the repair was about 1 ½” deep. We mixed five units of material. Initially I started with 10 quarts of water. After the material was added to the water, I combined an additional quart of water to get a 9- inch slump. We mixed the material for 7-minutes and had 12-minutes of working time. Then we applied a steel trowel finish to the repair.
Conclusion:
The repair took 1-½ hours to complete. Caltrans liked the material’s overall performance. The Bridge Supervisor said he liked how you can push down the aggregate and achieve a smooth finish. The crew liked the fact the material was a turn-key product and did not have to bring additional rock to add to the mix. I had the lead worker ask me if you could remove some of the rock to make it more of a neat material. I told him that this was not possible and/or recommended. I informed him that he should use SLQ, 15.0 or TR if he needed a neat material. Caltrans opened the area back up to traffic a 1-½ hours later.
