Definitions

Humidity Testing

Humidity Testing - Checks whether the moisture level of the concrete slab or screed has reduced to a value where flooring can be safely laid. The relative humidity of a concrete floor can be checked in accordance with BS 8203:2001 or using the humidity sleeve method.

Honeycombing

Honeycombing - is where coarse aggregate is exposed at the surface of a formed joint in a concrete element.

Highway Straightedge

Highway Straightedge - A highway straightedge is a tool used to screed concrete floors. It is also referred to as a paver’s straightedge.

‘High’ and ‘Low Points’

‘High’ and ‘Low Points’ - ‘High point’ and ‘low point’ are general terms used to describe ‘peaks and troughs’ on the surface of a concrete floor.

Heat Of Hydration

Heat Of Hydration - is the release of heat during concrete curing.

Gypsum

Gypsum - is a sulphate mineral which is added to the clinker during grinding in the production of Portland cement. It is composed of hydrated calcium sulphate.