Tests

Tests - Control Tests for Concrete Testing Aggregates...

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Control Tests for Concrete
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Control Tests for Concrete Testing Aggregates Determine suitability of material with tests for — abrasion, freeze/thaw resistance, potential AAR, etc. Assure uniformity with tests for — moisture control, relative density , gradation, etc. Purpose —
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Control Tests for Concrete Tests for Aggregates Sampling Organic impurities Objectionable fine materials Grading Surface Moisture Other
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Control Tests for Concrete Sampling ASTM D 75 (AASHTO T 2) Practice for Sampling of Aggregates ASTM C 702 (AASHTO T 248) Practice for Reducing Samples to Testing Size
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Control Tests for Concrete Organic Impurities ASTM C 40 (AASHTO T 21) Organic Impurities in Fine Aggregates for Concrete
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Control Tests for Concrete Objectionable Fine Material ASTM C 117 (AASHTO T 11) Material Finer than 75- μ m (No. 200) Sieve by Washing ASTM C 142 (AASHTO T 112) Clay Lumps and Friable Particles
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Control Tests for Concrete Grading ASTM C 136 (AASHTO T 27) Sieve Analysis of Fine and Coarse Aggregates
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Control Tests for Concrete Moisture Content (1) ASTM C 566 (AASHTO T 255) Total Evaporable Moisture Content of Aggregate by Drying P = 100(M – D)/D where P = moisture content of sample, percent M = mass of original sample D = mass of dried sample
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Control Tests for Concrete Moisture Content (2) When drying equipment is not available— ASTM C 70 Surface Moisture in Fine Aggregate
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Control Tests for Concrete Laboratory and Field Tests for Freshly Mixed Concrete Sampling Consistency Temperature Air content Density Preparation of strength specimen Setting Time
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Control Tests for Concrete Samplin g ASTM C 172 (AASHTO T 141) Sampling Freshly Mixed Concrete Requirements: Sample size 28 L (1 ft 3 ) Less than 15 min between first and last portion of sample Sample should not be taken from first or last portion of batch discharge
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Control Tests for Concrete Tests Used to Measure Consistency Slump test ASTM C 143 (AASHTO T 119) K-Slump Tester ASTM C 1362 FHWA Vibrating slope apparatus Vebe Consistometer ASTM C 1170 Thaulow test Kelly ball penetration test ASTM C 360-92—now discontinued
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Control Tests for Concrete Slump Test
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Control Tests for Concrete Frequency of Testing — Slump First batch of concrete each day Whenever the consistency of concrete appears to vary Whenever strength-test cylinders are made at jobsite
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Control Tests for Concrete Temperature Measurement ASTM C 1064 (AASHTO T 309) Temperature of Freshly Mixed Portland Cement Concrete
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