Less porous concrete
- Thread starter Howie
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You need to seal them yourself with a coating. That epoxy guy should be a person to talk to.
'the epoxy floor guy'
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Porosity of concrete usually refers to the air pockets that are developed in the concrete 'after' drying.
These air pockets are developed when water (generally too much) evaporates during the curing process. Concretes porosity is generally More pourous on lower psi (2500-3000 psi) grade mixes and less pourous on Higher grades such as 4000-5000 psi.
Here is Why.
The strength of concrete is DIRECTLY proportional to the CEMENT to WATER ratio. The MORE Cement and LESS water = a HIGHER psi Mix. SO More water and less cement means lower quality.
The amount of water needed to start the CHEMICAL REACTION (yes concrete does NOT DRY) is VERY little. But the amount of water needed to make the concrete flowable and workable in order to shape it and place it where it will be best used is generally a lot more.
Hope this helps.
These air pockets are developed when water (generally too much) evaporates during the curing process. Concretes porosity is generally More pourous on lower psi (2500-3000 psi) grade mixes and less pourous on Higher grades such as 4000-5000 psi.
Here is Why.
The strength of concrete is DIRECTLY proportional to the CEMENT to WATER ratio. The MORE Cement and LESS water = a HIGHER psi Mix. SO More water and less cement means lower quality.
The amount of water needed to start the CHEMICAL REACTION (yes concrete does NOT DRY) is VERY little. But the amount of water needed to make the concrete flowable and workable in order to shape it and place it where it will be best used is generally a lot more.
Hope this helps.
