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Presented By: Rich Brewster and Mark Taylor. The Value of Testing Your Concrete. Because we want to know what we’ve made! To ensure compliance with specifications To keep production moving forward To adhere to our Quality Control program requirements To evaluate your product.
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Presented By: Rich Brewster and Mark Taylor The Value of Testing Your Concrete www.concrete-pipe.org
Because we want to know what we’ve made! To ensure compliance with specifications To keep production moving forward To adhere to our Quality Control program requirements To evaluate your product Why Do We Test Concrete? www.concrete-pipe.org
Workable Concrete Strong Concrete Durable Concrete What are We Looking For? www.concrete-pipe.org
Consistency in our products Higher quality products Avoid major problems Troubleshooting Cost savings Cover our butts! What Do We Have to Gain From Testing? www.concrete-pipe.org
Does Anyone Test Concrete for Another Reason Not Covered So Far? www.concrete-pipe.org
And What are the Benefits of These Tests? What Types of Testing Should We be Doing? www.concrete-pipe.org
Plastic Concrete Testing www.concrete-pipe.org
Plastic Concrete Testing Entrained Air ACI 318 www.concrete-pipe.org
Plastic Concrete Testing Entrained Air www.concrete-pipe.org
Plastic Concrete Testing Freeze-thaw protection (Durability) Affected by many factors Air entraining admix dosage Other admixes Ambient and concrete temperature Mixing and travel time W/Cm ratio The type of cement used ASTM C231 Pressure Method ASTM C173 Volumetric Method Entrained Air www.concrete-pipe.org
Plastic Concrete Testing Slump Test Wetcast www.concrete-pipe.org
Plastic Concrete Testing Workability (Consistency) Indicator of improperly mixed batch No longer an accurate measure of durability when using water reducing admixtures. ASTM C143 Slump Test Wetcast www.concrete-pipe.org
Plastic Concrete Testing SCC Spread Test www.concrete-pipe.org
Plastic Concrete Testing Measures the plastic properties of Self Consolidating Concrete to achieve consistency with each batch Visual Stability Index (VSI) is also determined during the spread test. VSI value ranges form “0” for highly stable to “3” for unacceptable stability Viscosity is also checked by measuring the amount of spread ASTM C403 SCC Spread Test www.concrete-pipe.org
Plastic Concrete Testing Slump Test - Drycast www.concrete-pipe.org
Plastic Concrete Testing Consistency Not a standardized test Slump Test - Drycast www.concrete-pipe.org
Plastic Concrete Testing Temperature www.concrete-pipe.org
Plastic Concrete Testing Strength, workability, and durability Critical to hydration ASTM C1064 Freshly Mixed Concrete Temperature www.concrete-pipe.org
Plastic Concrete Testing Unit Weight www.concrete-pipe.org
Plastic Concrete Testing Determine your yield Verify mix designs Situation Effect on Yield Air content decreases by 1% -0.27 cu ft Water content decreases by 1 gallon -0.13 cu ft Coarse agg batch weight increases by 2% -0.22 cu ft Coarse agg specific gravity increases by 0.02 -0.06 cu ft Coarse agg specific gravity increases by 0.02 -0.08 cu ft Mix consistency ASTM C138 Unit Weight (Density) www.concrete-pipe.org
Plastic Concrete Testing Cylinders www.concrete-pipe.org
Plastic Concrete Testing We need a representative sample of our product ASTM C31 Cylinders www.concrete-pipe.org
Plastic Concrete Testing Initial Set www.concrete-pipe.org
Plastic Concrete Testing How long? Why do we need to know? ASTM C403 Initial Set www.concrete-pipe.org
Plastic Concrete Testing Does anyone do any other testing on plastic concrete in their plants? www.concrete-pipe.org
Hardened Concrete Testing www.concrete-pipe.org
Hardened Concrete Testing Compressive Strength www.concrete-pipe.org
Hardened Concrete Testing Verify mix designs Determine mix efficiency Determine if mix is economical ASTM C39 Compressive Strength www.concrete-pipe.org
Hardened Concrete Testing Stripping and handling Yarding Shipping Acceptance Work Progress Strength www.concrete-pipe.org
Hardened Concrete Testing Absorption www.concrete-pipe.org
Hardened Concrete Testing A measure of permeability Low permeability = high durability ASTM C497 Absorption www.concrete-pipe.org
Hardened Concrete Testing Resistivity www.concrete-pipe.org
Hardened Concrete Testing Another durability test Measures resistivity to chloride ion penetration Estimate likelihood of corrosion AASHTO TP 95 – Werner Probe (ASTM Spec in the works) ASTM C1202 – Rapid Chloride Permeability Resistivity www.concrete-pipe.org
Hardened Concrete Testing Petrographic Analysis www.concrete-pipe.org
Hardened Concrete Testing Learn a lot about your hardened concrete Air content and distribution Aggregate information Cracking Steel reinforcement Secondary deposits Water/Cementitious Ratio Porosity Distribution Binder Type and Paste Content Depth of carbonation Petrographic Analysis www.concrete-pipe.org
Hardened Concrete Testing Does anyone do any other testing on hardened concrete in their plants? www.concrete-pipe.org
Finished Product Testing www.concrete-pipe.org
Hardened Concrete Testing Three-Edge-Bearing Test www.concrete-pipe.org
Finished ConcreteTesting A concrete test, but more Test the whole structure Quota requirement for QCast Certification ASTM C497 Three-Edge-Bearing Test www.concrete-pipe.org
Finished ConcreteTesting Verifies the sealing capabilities of gasketed joints ASTM C497 Hydrostatic Testing www.concrete-pipe.org
Finished ConcreteTesting Verifies the sealing capabilities of gasketed joints ASTM C497 Hydrostatic Testing www.concrete-pipe.org
42 Questions? • Rich Brewster 989-891-7493 rbrewster@ncp-inc.com • Mark Taylor 318-308-8514 markr.taylor@rinkerpipe.com www.concrete-pipe.org
43 Review for Certification Test www.concrete-pipe.org
