Concrete Admixtures: Type_C
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_C | accelerator_calcium_chloride | 0 | ASTM C494 | Calcium chloride accelerator (NOT for reinforced concrete) | PROHIBITED in prestressed or reinforced concrete (chloride-induced corrosion); for unreinforced concrete only; max 2% CaCl2 by cement mass; ASTM C1202 permeability increases | 1,300 | 130 | 520 | -120 | -90 | 0 | 50 | 10 | 25 | 0 | 0 | 0 |
| Type_C | accelerator_nonchloride | 0 | ASTM C494 | Non-chloride accelerator (calcium formate/triethanolamine) | Preferred for reinforced concrete; sodium thiocyanate or calcium formate based; less effective than CaCl2 but safe for rebar | 1,950 | 260 | 650 | -60 | -60 | 0 | 30 | 10 | 15 | 0 | 0 | 0 |
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