Concrete FAQs (Frequently Asked Questions)
What is concrete?
Concrete is a mixture of various ingredients. The blend includes portland cement, water, coarse and fine aggregates, and chemical additives.
What is portland cement?
Portland cement is manufactured from limestone and clay that has been ground to a fine powder.
What is the difference between concrete and cement?
Cement and concrete are commonly referred to as the same thing. This is not the actual case, cement is an ingredient in concrete. Cement is a paste that binds the aggregates together that form concrete.
How long does it take for concrete to cure?
Depending on the weather and other environmental conditions the curing time of concrete can vary. Generally after 7 days it is considered to be cured. The full strength can take about a month or even last for years depending on the quantity poured.
How is concrete measured?
The standard unit of measurement for commercially sold concrete is by the cubic yard.
Why does concrete crack, and how can I fix it?
Concrete will develop cracks over time. The goal is to minimize and control the amount of cracking by using the correct mix and quality workmanship. The primary causes of cracking are stress related due to the shrinkage of the concrete as it cures, a poor sub-grade, and general wear and tear due to use.
Are there quality standards for portland cement?
Yes, the ASTM (American Society for Testing and Materials) has a standard specifications for use in the United States.
How do I remove stains from concrete?
There is a variety of commercial products available to
What is spalling?
Spalling is the term of rock or stone breaking off in fragments.