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Rafael C Nelson
New member
Username: rc_nelson

Post Number: 1
Registered: 01-2004
Posted on Monday, January 12, 2004 - 06:39 pm:   Edit PostDelete PostPrint Post

I looking for a concrete product to overlay over an existing slab for an ADA compliant landing in front of doors. The new overlay would be approximately 2” thick to a feathered edge. I’m concerned that regular concrete will chip and disbond from the existing conc. I thinking an acrylic admix along with a bonding agent between new and existing conc. would work. Any suggestions on products, warnings, feedback would be appreciated.

Rafael
John Bunzick, CCS, CCCA
Senior Member
Username: bunzick

Post Number: 180
Registered: 03-2002
Posted on Tuesday, January 13, 2004 - 08:59 am:   Edit PostDelete PostPrint Post

Good preparation of the existing slab to make sure that there are no deleterious substances remaining, and that there is a good rough surface to bond to. I'd also sawcut the existing concrete at the thin edge of the topping slab and chisel out the concrete behind to a depth of 3/4 to 1 inch so that you are not really feathering to zero. There are numerous admix products that can be used, I don't have a specific recommendation for manufacturer.
Phil Kabza
Senior Member
Username: phil_kabza

Post Number: 39
Registered: 12-2002
Posted on Friday, January 16, 2004 - 05:47 pm:   Edit PostDelete PostPrint Post

I'd look at specialty patching and underlayment products from someone like Euclid Chemical.

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