Concrete Floor Setting Time

It is ideal for new floor and repair projects when you need long flow life and working time.

Concrete floor setting time.

We would like to show you a description here but the site won t allow us. Factors affecting concrete setting time. Colder weather or in the middle of summer several admixtures may be used in the concrete mix to aid in the placement of the final product. Contractors add chemicals to the concrete to effect the setting time.

At low temperatures setting time is retarded. Proper curing techniques and site preparation will aid the setting time. Moisture plays a critical role in curing time for concrete. Cooler weather calls for chemicals to speed the setting process.

For example on a hot day the concrete may set up to quickly to be adequately leveled and troweled to produce the desired surface. Concrete floors can be susceptible to settling and cracking over time and this is a more frequent problem when an existing structural slab has adapted to a finished residential flooring surface such as when a basement or loft condo has been converted to living space. However when concrete is being used in times of temperature extremes i e. If there is not sufficient water in the mix the concrete will cure too fast resulting in weaker overall strength.

Too much moisture often used in the finishing step will weaken the top layer and cause flaking. Use of admixture and its effects on setting time. The initial setting time of concrete is the time when cement paste starts hardening after adding water. Initial set as defined by aci 116r is a degree of stiffening of a mixture of cement less than final set generally stated as an empirical value indicating the time in hours and minutes required for the cement paste to stiffen sufficiently to resist to an established degree the penetration of a weighted test needle.