HPC - High-Performance Concrete Characteristics of...

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High-Performance Concrete
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High-Performance Concrete Characteristics of High-Performance Concretes High strength High early strength High modulus of elasticity High abrasion resistance High durability and long life in severe environments Low permeability and diffusion Resistance to chemical attack
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High-Performance Concrete Characteristics of High-Performance Concretes High resistance to frost and deicer scaling damage Toughness and impact resistance Volume stability Ease of placement Compaction without segregation Inhibition of bacterial and mold growth
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High-Performance Concrete Materials Used in High- Performance Concrete (1) Material Primary Contribution/Desired Property Portland cement Cementing material / Durability Blended cement Cementing material / Durability / High strength Fly ash / Slag / Silica fume Calcined clay/ Metakaolin Calcined shale Superplasticizers Flowability High-range water reducers Reduce water-cement ratio Hydration control admix. Control setting
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High-Performance Concrete Materials Used in High- Performance Concrete (2) Material Primary contribution/Desired property Retarders Control setting Accelerators Accelerate setting Corrosion inhibitors Control steel corrosion Water reducers Reduce cement and water content Shrinkage reducers Reduce shrinkage ASR inhibitors Control alkali-silica activity Polymer/latex modifiers Durability Optimally graded aggr. Improve workability/reduce paste
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High-Performance Concrete Selected Properties of High- Performance Concrete (1) Property Test Method Criteria that may be specified High Strength ASTM C 39 40-140 MPa @ 28 to 91 days H-E Comp. Strength ASTM C 39 20-30 MPa @ 3-12 hrs.or 1-3 days H-E Flex. Strength ASTM C 78 2-4 MPa @ 3-12 hrs.or 1-3 days Abrasion Resistance ASTM C 944 0-1 mm depth of wear Low Permeability ASTM C 1202 500 to 2000 coulombs Chloride Penetration AASHTO T 259/260 Less than 0.07% Cl at 6 months High Resistivity ASTM G 59 Low Absorption ASTM C 642 2% to 5%
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Concrete Selected Properties of High- Performance Concrete (2) Property Test Method Criteria that may be spec. Low diffusion coeff. Wood, Wilson, Leek 1000 x 10 -13 m/s Resistance to chemical attack sat. solution in wet/dry environment No deterioration after 1 yr. Sulphate attack ASTM C 1012 0.1% max. exp. @ 6 mos.
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This note was uploaded on 12/15/2011 for the course CM 217 taught by Professor Rogers,m during the Fall '08 term at BYU.

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HPC - High-Performance Concrete Characteristics of...

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