Concrete Admixtures: Type_F
Concrete chemical admixture reference data — ASTM C494 Types A/B/C/D/E/F/G/S, ASTM C260 air-entraining, calcium nitrite corrosion inhibitors, VMA, SRA, and lithium nitrate ASR mitigation. Parameters include dosage range (mL/100 kg cement), water reduction (%), initial/final set time change (min), compressive strength effect at 1/7/28 days (%), slump increase (mm), air content change (%), and compatibility notes.
| admixture type | product class | air content change pct (%) | astm standard | common name | compatibility notes | dosage max mL per 100kg (mL/100kg-cement) | dosage min mL per 100kg (mL/100kg-cement) | dosage typical mL per 100kg (mL/100kg-cement) | set time change final min (minutes) | set time change initial min (minutes) | slump increase mm (mm) | strength 1d pct change (%) | strength 28d pct change (%) | strength 7d pct change (%) | water reduction max pct (%) | water reduction min pct (%) | water reduction typical pct (%) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Type_F | HRWR_melamine | 0 | ASTM C494 | Melamine sulfonate superplasticizer | Non-retarding; popular for precast; shorter slump retention than naphthalene; reduced water reduction vs PCE | 1,950 | 390 | 780 | 0 | -30 | 130 | 15 | 10 | 15 | 20 | 10 | 15 |
| Type_F | HRWR_naphthalene | 0 | ASTM C494 | Naphthalene sulfonate superplasticizer | Older HRWR; less sensitive than PCE; good for precast; less effective water reducer than PCE; some retardation at high dose | 1,950 | 390 | 780 | 0 | -60 | 150 | 20 | 15 | 20 | 25 | 12 | 18 |
| Type_F | HRWR_polycarboxylate | 0 | ASTM C494 | PCE superplasticizer (most common) | Primary HRWR for high-strength/SCC; dose response highly cement-specific; test slump loss; incompatible with some lignosulfonate WR; may accelerate early stiffening with C3A-rich cements | 1,950 | 260 | 780 | 0 | -60 | 150 | 15 | 20 | 20 | 30 | 15 | 20 |
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