Weld-Crete® Case Study
In this case study, Mexcon, Inc. from Worcester, NY uses Weld-Crete® in the installation of Detecto-Tile precast concrete tiles. The following photos and text illustrate and describe the installation process and demonstrate how Weld-Crete® was used.
STEP 1: Before the concrete is poured, the tiles are layed out and marked for cutting to accommodate the curb radius.
STEP 2: A concrete saw is used to cut tiles.
STEP 3: After cutting, the underside of the tiles is coated with Weld-Crete®, a product intended to aid in bonding cured concrete to wet concrete. The coating can take place as much as 24 hours ahead of placement.
STEP 4: The underside of the tiles have grooves to help form a bond with the fresh concrete.
STEP 5: After pouring, the ramps are floated and allowed to set up for 30 to 45 minutes.
STEP 6: Once the concrete starts to set up, the area where the tiles will be placed is measured and marked out with a 1 inch deep edger.
STEP 7: Using the markings, the area for the detectable warning is scraped out about 1 inch deep.
STEP 8: After scraping out the tile area, the concrete is floated to provide a smooth, relatively even receiving surface.
STEP 9: Tiles are then placed in the depression.
STEP 10: Tiles are arranged to parallel the radius of the curb and the edges of the domes are used to align the tiles so all domes are in line with each other.
STEP 11: Adjacent concrete is then finished right up to the edge of the tiles.
STEP 12: The rest of the ramp is finished in the normal fashion, including a broom finish perpendicular to the line of pedestrian travel. The tiles have a protective coating that will allow any concrete spatters to be cleaned off with a wet sponge.
STEP 13: Ramps are open to pedestrian traffic once concrete has hardened.