Speed Screed completed the first plots on the new Gelder Group development at St Michael’s Road, Kettering NN15 6AU.
The screed requirements on this project were that of a Traditional Semi Dry 1:3 Fibre Screedthe screed being mixed on site using a Putzmeister M760 with skip and scarper. The skip and scaper working together to reduce labour effort when mixing the screed.
Following the requirements of the British Standard BS8204-1:2003 by using Quinn Cement 42.5N strength supplied by CCF. When mixing half of the sand is placed in the vessel, then cement, water and construction fibres Adfil Fibrin 660F. The fibres are present to significantly reduce the occurrence of plastic shrinkage and plastic settlement cracking in screed. The second half of the sand is then added into the vessel before mixing begins.
For convenience the screed is pumped to the exact location where it is required, and then the installers lay the screed to provided datums.
A Traditional 1:3 Fibre Screed would be classed as a heavy duty screed, used in commercial project where extra strength is required to resist the stresses of heavy useage. Early strength gains in the screed will often benefit early foot and site traffic. Also allowing for earlier than normal loading of the screed, the screed design is made in full consultation with the engineer who calculates the performance of the building.
Further admixtures may be added to the screed to improve early strength gain to allow for early traffic and loading. A consideration for admixtures would be to enable faster drying of the screed, and this would allow for floor coverings to be laid very quickly after laying the floor screed. Program times can be significantly reduced by using a range of admixtures to change the performance characteristics of the floor screed.