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Description: Concrete floor replacement is costly. Resurfacing costs less and can prolong floor life, but you need to know what type of overlay to use and how to get good results. This publication explains when bonded overlays will work and when unbonded overlays are best. Other topics include preparation of old surfaces, bonding grouts, mix design, placing, finishing, jointing, and curing. Self-leveling toppings and underlayments are also covered.
Describes procedures for fully bonded and unbonded concrete overlays of both light- and heavy-duty floors. Factors affecting choice of thickness and whether or not to bond the overlay are discussed. Base slab repair needs for either overlay type are described. Also discussed are the needed construction steps for fully bonded overlays�surface preparation; use of edge forms; bonding grout; concrete proportioning; placing and finishing; jointing; and curing. For unbonded overlays the steps include use of a separation layer (bondbreaker); concrete proportioning; placing; jointing; and use of reinforcement.
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