Superplasticizer

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Superplasticizer
Posting date : Feb 02, 2010
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28-
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ITEM FDN-A net starch fluidity ( ㎜ ) ≥ 250 content of Chloride (%) < 0.3 PH value 7 ~ 9 surface tension(N/m) (7 1 ± 1) × 10 -3 solids content(%) ≥ 93 Na 2 SO 4 content(%) < 5 Parameters & Acceptance Criteria (FDN-A Ffor Referance ) Parameters Criteria Actual Results Parameters Criteria Actual Results Water Reduction, % ≥ 20 21.8 Compression strength, % 1d ≥ 180 200 Water Penetration, % ≤ 90 79 3d ≥ 170 194 Air Content, % ≤ 2.0 > 1.6 7d ≥ 150 161 Temporal Distribution for setting (min) Initial setting time -9 0 ~ +120 +22 28d ≥ 130 142 Terminal setting time +16 Shrinkage, % 28d ≤ 130 125 Corrosion to steel bars None None Note: Standard Blend Dosage:0.70 %(as cement amount)

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