Ecocentric definition, a philosophy or perspective that places intrinsic value on all living organisms and their natural environment, regardless of their perceived usefulness or importance to human beings. See more.
Concrete first must be scoured clean with a concrete cleaning solution, a scrub brush or a cleaning machine, then allowed to dry before any etching takes place. Never clean a new concrete pad until at least one month of curing time has been allowed at minimum. After all the water has been removed, the pad should have at least 48 hours of drying time before you apply any etching to the surface. If the weather is particularly humid, wait up to 72 hours for best results. There are numerous types of etching materials available for use with concrete, but as a general rule, they only need 15 to 30 minutes of time on the surface of the concrete to work their way down through the initial layer and etch the surface.
By Concrete Construction Staff. Q: We placed a concrete slab for an exterior multipurpose game court. How long do we have to wait before painting basketball-court lines? A: Because many different paint types are available for concrete surfaces, you should follow the instructions provided by the paint manufacturer. Most literature recommends a 28-day cure, but it's not clear whether that means a 28-day drying period after the concrete has been moist cured, or a 28-day wait after the concrete has been placed. The Portland Cement Association (Ref. 1) recommends waiting 28 days to 6 months, depending on surface conditions and the coatings used on the surface.