What is slump?
To measure slump, a cone cylinder is filled with the batched concrete. When the cone is removed, the slump is the distance from the top of the cylinder to the top of the slumped concrete. In other words, it simply is how thick the concrete is. Adding too much water to a mix design will affect the integrity of the concrete strength (PSI). If more flowability is required for placement, additives such as a water reducer or plasticizer may be used.
What are shortload fees & standby time?
In the concrete industry, small loads are charged a delivery fee. The usual standard is under 4 yards. The fee will vary depending on how much you need. It is also standard to allow a set amount of time (6 minutes) per yard to offload the concrete. Under normal circumstances, this is plenty of time. A per minute rate is charged for overtime. This allows for better dispatching of trucks as well as cost control.
How do I figure out how much concrete I need?
- Turn all inches into feet
- Cube it
- Divide by 27 (27 cubic feet in a cubic yard)
This is the exact measurement. It is very hard if not impossible to get a slab exactly 4" deep throughout unless you are pouring into a form! Call for a free estimate.
What does 5sk mean?
5sk means there are five 94-lb sacks of cement in each cubic yard. The PSI (pounds per square inch) for 5sk is 3000. You can increase by 1/2 sks to increase finishability and strength with a cost increase.
How long can I pour concrete into the winter months?
Concrete can be poured throughout the year under certain circumstances. The ground must not be frozen. Concrete stops hydration (the chemical reaction between cement and water stops) at 42 degrees Fahrenheit. Therefore concrete must remain above 42 degrees for a minimum of a week or more. Accelerators can be added to increase setup time.
