Floor Screed Testing

To be able to accept a bonded wood floor the screed must have a tensile strength of 1 n mm 2 and for wood block parquet flooring 1 2 n mm 2.

Floor screed testing.

A weight of either 2 4kg is dropped at a distance from 1m to strike the face of the screed at varying locations depending on the size of the floor area. With the tensile pull off test according to en 13892 8 the tensile strength of the screed is determined. Flexural test on concrete its significance procedures and applications. The retention of excessive moisture in screeds is a major problem that affects the quality and longevity of floors.

Screeds can take many months to dry out and it is extremely important to determine the moisture content of a screed accurately prior to the application of further floor finishes. Lifting and replacing screed during the later stages can be expensive and time consuming. Is the screed strong enough to install a wood floor. Floor screed is composed of cementitious materials and sand blended based on a suitable mix design and applied to provide a leveled surface for the floor finish which is introduced to the surface of the floor screed.

To identify strength of a screed or screed collapses to determine weakness. Moisture testing is carried out using a suitable approved method such as a flooring hygrometer or carbide bomb test. Moisture test by calcium carbide method. As it is often difficult to predict the drying times accurately it is always important to carry out a reliable moisture assessment test prior to the installation of the final finish.

We test all types of screed from traditional sand and cement screeds proprietary screeds anhydrite calcium sulphate screeds polymer modified screeds and resin screeds. Manchester building testing laboratories offer both physical on site screed testing and laboratory chemical analysis of the floor screed. Poor compaction moisture content insufficient binder cement. The accurate prediction of drying times of standard screeds often being a difficult task moisture retention in screeds is a major problem that can disrupt moisture sensitive floor finishes.

How is it used. Heat screed now offer a screed bre test service also known as a drop hammer test using our own bre test equipment specific to our company and what we do this is a test for soundness of floor screed which can be affected by a number of variables including. Failure to determine that the screed has sufficiently dried prior to application of a damp proof membrane or a vinyl floor covering can lead to problems at a later stage. Moisture testing should be carried out after the commissioning of the ufh system but before any tiles are laid.

With the increasing number of screed failures in theuk contractors are now taking every step to ensure the quality of their screed meets the expected quality standards.