Calcium Chloride Cement Accelerator
CAS Number: 10043-52-4
Calcium chloride (CaCl₂) is an effective cement accelerator used in shallow, cold-temperature oil well cementing operations to shorten the thickening time and compressive strength development of Portland cement slurries. At dosages of 1–4% BWOC, it can reduce the time to 500 psi compressive strength by 30–60%. Anhydrous and flake grades are both used in oilfield cementing, with flake grade preferred for on-site mixing.
Technical Specifications
| appearance | White crystalline powder or flakes |
| purity (%) | ≥94.0 (anhydrous), ≥74.0 (dihydrate) |
| compatible API class | A, C, G, H |
| insoluble matter (%) | ≤0.2 |
| moisture (%, anhydrous) | ≤1.0 |
Applications
- Cold-climate and shallow well cement acceleration
- Arctic and permafrost cementing operations
- Rapid-set cement for wellbore integrity repair
- Surface casing cementing in cold formations
- Reducing WOC (wait-on-cement) time
Key Features
- Reduces thickening time and accelerates early compressive strength
- Essential for cold-temperature cementing below 30°C
- Available as anhydrous powder or easy-to-handle flakes
- Cost-effective and globally available cement additive
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