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Moisture Assessment
Calcium Carbide Test
The retention of excessive moisture in screeds is a major problem that affects the quality and longevity of floors. 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. According to industry benchmarks, a standard traditional screed of 75mm thickness usually takes 110 days for optimal drying- provided good airflow and a controlled temperature of 20°C and Relative Humidity of 50% are maintained. This is however different for modified screeds, and may vary from one brand of screed to another.
Calcium Carbide Test
Calcium Carbide Test –
The moisture content of the screed is assessed by testing a sample of the screed using a carbide moisture meter. A sample of the screed is removed at approximately 50% of the screed depth, and the weight of the sample is measured accurately. The removed screed sample is further mixed with a calcium carbide reagent and subjected to orbital rotation in a vacuum flask. The results are displayed on a pressure gauge as CM%. The test is relatively quick and easy to carry out, and yields accurate results. However, as the calcium carbide method is a destructive form of testing, minor remedial repairs would generally be necessary for the screed area from where the sample is removed.
As per the British Standards Code of Practice, the traditional hair hygrometer test is recommended for estimating the relative humidity in screeds. However, this is a time consuming process and is not a recommended test method for certain modified screeds that form a chemical bond with water.
As modified screeds are currently not covered in the British Standards Code of Practice, manufacturers generally prefer the Moisture Content Test for screeds, as these yield speedy and more accurate results.
The commonly used Moisture Content Test in screeds are:
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Our Recent
SCREEDING WORK
- New A & E Department, Wexham Park HospitalMarc McAdam2019-11-26T14:14:52+00:00
New A & E Department, Wexham Park Hospital
SCREED SYSTEMS
There are many products on the market and CSC have reached a high industry standard by fully understanding the science behind the installation and associated processes. We have worked very closely with our supply chain to ensure that only the best quality materials are used on all of our sites across the UK.
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THE SCREEDER’S JOURNAL
@CSCScreeding
Screeding in Progress! The team at CSC are progressing well in the extremely complicated wet change area on this leisure project. Well done team, keep up the great work. #cscscreeding #constructionuk #screeding #qualityandvalue #cscblue #supertrowel
Another one of our Mörtel Meister Screeding Pumps at a large residential project in Oxford. We’re installing the DPM, thermal and acoustic insulation and of course, the high quality fibrescreed. #cscscreeding #constructionuk #newhomes #oxford #mortelmeisteruk #screedpumps #screedcontractor
One of our Mörtel Meister Screeding pumps with skip and scraper at the University of Portsmouth, Sports Building Project. #constructionuk #mortelmeisteruk #screeding #screedpumps #cscblue
Visqueen High Performance foil faced membrane for the wet change areas on this leisure project. This is quite a challenging area of the project where we have routed the back of the sheets to allow for all the earthing straps, drainage channels and fixing brackets as well as a bunch of small change cubicles. #visqueen #constructionuk #leisurecentre #portsmouth
Some great photos of the new Braywick Leisure Centre in Maidenhead. We passed by at the weekend and whilst the building looked awesome, it’s such a shame that it’s not operational due to COVID. Let’s hope things change soon and the local community can get to use the amazing facilities. #constructionuk #maidenhead #localproject #braywickleisurecentre #community
We’re always prepared at CSC! We purchased an Armorgard Cutting Station from @adafastfixltd which allows us to cut steel angles both on and off site. This transportable cutting station really does make things easy for the operator. #armorgard #cuttingstation #cscscreeding #steelangles #constructionuk
On site at the University of Portsmouth for Wates Construction. We’re moving into the complex part of the project, where we have some serious falls and cross falls to achieve. Lots of variable interface work ahead but nothing we’re not used to. The project team are meeting to ensure all details are captured. The perfect start to a perfect finish. #cscscreeding #constructionuk #screeding
CSC Blue on a project near you! The boys in blue at a BuilderScreed project in North London. We’re installing an Isopol Heavy Duty Polymer Screed with A142 steel mesh which will provide a super high strength floor. #cscscreeding #screeding #cpguk #flowcrete #screedcontractor #constructionuk #isocrete
A low profile screed system completed on a CSC BuilderScreed job. Isocrete Self Level Renovation screed was used to provide a flat level surface for floor finishes and act as the heat conductor for the underfloor heating. Low profile underfloor heating and screed systems are great for retrofit refurbishment projects. #cpguk #flowcrete #cscscreeding #screeding #constructionuk #builderscreed #refurbishment
One of our Mörtel Meister Screeding Pumps at the Littlemore Park project in Oxford. Great feedback from the screed team, as we aim to provide the best equipment. #cscscreeding #cscblue #screeding #constructionuk #screedpumps #mortelmeisteruk #screedingnewhomes #oxford
CSC Blue just isn’t official, unless it’s got the corporate CSC swoosh!
We truly believe a company should have a consistent brand identity in order for its customers to make a recognisable association.
#cscbluecorporate #cscblueofficial #cscblue #cscblueonaprojectnearyou #cscswoosh #branding #brand #cscbrand #marketing #constructionuk #socialmedia #digitalmarketing #logo
Rewinding the clock and this is where our venture into Mörtel Meister Screeding Pumps, started. Over two years ago, we invested in five new machines as our first order and have never looked back since. Easy to maintain, very reliable, parts on the shelf and readily available with massive savings on fuel. This represented a Great Day! #cscscreeding #mortelmeisteruk #mortelmeisterworld #screedpumps #screeding
Construction Accreditations
CSC Screeding are members of Constructionline, CHAS and Builders Profile where a predefined Health & Safety questionnaire is pre-completed and our clients have direct access to the information. Documents contained in the pre-qualification system are updated throughout the year, ensuring continued compliance. We have focused on developing the business through constant innovation, implementation and collaboration. We are now ready for the business to grow with the increasing demand.
