Transcription of Concrete Floor Covering Failures - Foundation
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Concrete Floor Covering Failures - Foundation
18 August 2004 FPAWJEC oncrete FloorCovering FailuresB. Lee Lawrence, Lee Lawrence, , Janney, Elstner Associates, , Janney, Elstner Associates, Pond Springs Road, Suite 10713581 Pond Springs Road, Suite 107 Austin, Texas 78729 Austin, Texas 7872918 August 2004 FPAWJEI ntroduction Background:Background: Contributors to failure Mechanisms of failure Unique Floor Covering failure Case Studies:Unique Floor Covering failure Case Studies: alkali -silica reaction Sulfate attack Osmotic pressure Chemical attack (alkaline hydroxide)18 August 2004 FPAWJEC ontributors to failure The Commonly Accused Culprits Improper Application and Material ProblemsImproper Application and Material Problems Vapor and Vapor PressureVapor and Vapor Pressure Moisture (liquid)Moisture (liquid)18 August 2004 FPAWJEA pplication and Material Problems Application Issues:Application Issues: Slab construction/design deficiencies Improper surface preparation Installation at elevated moisture-vapor transmissionrates Improper mixing Material ProblemsMaterial Problems Material incompatibility Improper formulation18 August 2004 FPAWJEV apor and Vapor Pressure Vapor - Vapor - a substance in the gaseous state, as a substance in the gaseous state, asdistinguished from solid or liquid matterdistinguished from solid or liquid matter Water Vapor Pressure Water Vapor Pressure caused by a water vapor caused by a water vaporgradient, movement from areas of high humidity togradient, movement from
FPA 18 August 2004 WJE Introduction •Background: –Contributors to failure –Mechanisms of failure •Unique Floor Covering Failure Case Studies: –Alkali-silica reaction –Sulfate attack
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