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Concrete Slab Repair: Getting Flat is One Thing, Staying Flat is Another!
Constructing concrete slabs to successfully receive moisture-sensitive flooring materials or coatings is not a simple process.
In today’s market, fast-track construction has shortened the time period provided for concrete slab drying which, along with several other factors, has led to a significant increase in moisture-related flooring problems nationwide. Steps should be taken during the design phase of a project to minimize the potential for moisture related issues. Such steps include, among others, the requirement for a low-permeance pucture resistant vapor retarder directly beneath the slab to minimize moisture vapor transmission from the underlying base, using moderately low water-cement ratio concrete mixtures and allowing an adequate drying period or including acceptable moisture mitigation options as a separate bid item in the contract specifications.
Howard Kanare, Senior Principal Scientist in Structural Evaluation at CTLGroup, co-authored this January/February 2006 Concrete Repair Bulletin article with Scott Tarr and Peter Craig.
Source: Concrete Repair Bulletin
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