Frequently Asked Questions
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What is the purpose of cement in concrete?
It acts as a primary binder to join the aggregate into a solid mass.
What role does water play in producing concrete?
Water is required for the cement to hydrate and solidify.
Why does concrete harden?
The chemical process called cement hydration produces crystals that interlock and bind together.
Why does concrete set (harden) slowly?
It takes time for the hydrated cement crystals to form.
How can you make concrete set faster?
You can add calcium chloride or accelerator.
How can you make concrete set slower?
You can add sugar or “set retarder” to slow it down.
Is concrete stronger in compression, tension or the same in either?
It is stronger in compression.