Ready mixed concrete for driveways is normally specified in accordance with American Standards for Testing and Materials specification ASTM C-94. By following the correct specifications and construction methods, it will help avoid problems such as random cracking. In brief:
- Compressive strength – 4000 psi at 28 days is adequate strength for most climates
- Air content – designate air content with a range of 5% to 7% in all climates. In addition to improving the long term durability of the concrete, air content also improves the workability, without the need for adding water.
- Slump -For driveway paving is about specify 4 inch slump. Slump greater than 6 inches should definitely be avoided.
- Aggregates – designate the size of the coarse aggregate. Generally, ¾ or 1 inch is normally used. For a slightly higher fee, chert-reduced aggregate can be ordered to help prevent pop-outs.