Quikrete Fast Setting Concrete Mix - 50lb Bag
Quikrete Fast Setting Concrete Mix is a fast set concrete blend of special cements, sand, and gravel designed for quick turnaround work. It sets hard in approximately 20 to 40 minutes, making it a reliable option when you need concrete in place and curing quickly without tying up crews or equipment.
This fast setting concrete is especially useful for post setting jobs because it can be installed without mixing. Simply place the post, pour the dry concrete mix into the hole, and soak with water. It’s a time-saving solution for fencing contractors, landscapers, and general contractors handling multiple posts in a day.
Beyond posts, Quikrete fast set cement mix works well for smaller concrete projects like steps, sidewalks, and appliance pads where speed matters. It’s ideal for repairs and new placements that need to be finished quickly and put back into service sooner than standard concrete mixes.
Features
- Fast-setting formula for quick jobsite turnaround.
- Sets hard in about 20–40 minutes under typical conditions.
- Can be used for post setting without mixing.
- Simple install method: pour dry mix and add water.
- Great for fence, mailbox, deck, and basketball post installs.
- Works well for small concrete flatwork like steps and sidewalks.
- Ideal for appliance pads and similar small placement needs.
- Blend of cement, sand, and gravel for all-in-one convenience.
- Helps reduce labor time compared to traditional mixed concrete.
- Good choice for contractors needing fast set concrete on demand.
Quikrete Fast Setting Concrete Mix Specifications
| Specification | Details |
|---|---|
| Available Sizes | 50 lb (22.6 kg), |
| Yield (50 lb bag) | Approx. 0.375 cu ft (10.6 L) |
| Typical Setting Time (ASTM C191) | 20–40 min |
| Typical Compressive Strength @ 24 Hours (ASTM C39) | 1000 psi (6.8 MPa) |
| Typical Compressive Strength @ 7 Days (ASTM C39) | 2500 psi (17.2 MPa) |
| Typical Compressive Strength @ 28 Days (ASTM C39) | 4000 psi (27.6 MPa) |
| Applicable Standards | ASTM C39, ASTM C191, ASTM C387 |
| Machine Mixing Water (per 50 lb bag) | Start with approx. 4 pt (1.9 L); max expected below 5 pt (2.3 L) |
| Hand Mixing Water (per 50 lb bag) | Start with approx. 4 pt (1.9 L); max expected below 5 pt (2.3 L) |
| Required Mixer Capacity (per 50 lb bag) | At least 3/4 cu ft (21 L) |
| Post Setting (Typical Example) | Two 50 lb bags set a 3 in square post in a 9 in dia hole, 30 in deep |
| Post Setting Water (Typical) | Approx. 1 gal (3.8 L) per 50 lb bag (varies by soil conditions) |
| Recommended Slab Thickness | 2 in (50 mm) or thicker |
| Slab Control Joints | Cut 1 in (25 mm) deep joints every 6–8 ft (1.8–2.4 m) |
| Wait Time Before Strain on Posts | 4 hrs |
| Wait Time Before Walking / Heavy Objects on Slab | At least 4 hrs |
| Precautions | Mix only what can be placed in 20 min; protect from freezing for at least 48 hrs; avoid de-icers for at least 28 days |
