Concrete FAQS

IMG_1433Frequently Asked Questions

Should I add water when finishing concrete to make it more workable?

No. Adding water to concrete alters the water/cement ratio, which is critical for strong long lasting concrete that does not flake and chip later.  We strongly recommend the use of a concrete admixture (available in our office), which adds workability without altering the concrete design.

Will the color of the concrete change as it cures?

Yes it will become lighter as it cures.

What is a slump?

The slump is the consistency of the concrete.  (how wet or dry the mix is)

What is a tamp used for?

A tamp is used to blend the aggregate downward into the mix and bring the “cream” to the top.  The use of a tamp will provide a more workable mix and allow for a proper finish.

How long does it take for concrete to dry enough to walk on?

Wind, humidity, and sunlight are all factors in how long it takes for concrete to cure, walking, normally about 1 to 2 days.

How long does it take for concrete to cure enough to drive on?

Again, wind, humidity, and sunlight are all factors but the standard is about 5 to 7 days.

Should I put a curing compound or water on the concrete?

Yes after the initial 12 hours, apply a curing compound (available in our office) or cover the concrete to keep it from drying out too quickly and apply water every morning and night for 5 days.

Do I need to use base rock for my subgrade?

Base rock is often needed, but not always, dependent upon conditions and expected use of concrete.  When used, it will always need to be compacted.

What is a control/construction joint and where are they needed?

It is a groove joint used to control concrete cracking.Control joints should be placed no more than 10 feet apart.