Pre-packed mortar for weatherproof renders and screeds

Description

Ronafix Pre-packed Render/ Screed is a two component pre-packed mortar supplied as a sack of powder and a bottle of polymer gauging liquid. Ronafix Pre-packed Render/ Screed will produce a weatherproof render; it is bonded to the substrate with Ronacrete Standard Primer.  Ronafix Pre-packed Render/ Screed has very good resistance to water and water vapour, providing excellent resistance to frost, rain and entry of floodwater; resistance to water vapour of a 12mm layer is 60 MN·s·g–1 50 times greater than the same thickness of sand/ cement.  Flexural, tensile and compressive strengths are considerably better than unmodified render.  Typical shrinkage of Ronafix Pre-packed Render/ Screed is 0.01%, similar to that of epoxy resins.  Durability of Ronafix Pre-packed Render/ Screed is considerably greater than sand/ cement render, heat ageing tests showed only a minor reduction in tensile strength after simulated life of 40 years, while flexural strength was increased.

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DRYING OF SCREEDS

BS 8204-1 “Concrete bases and cementitious levelling screeds to receive floorings — Code of practice” section 6.11.1 suggests the following calculation for drying of screeds with no fast drying additi ...

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AVOIDANCE/ MITIGATION OF THE EFFECTS OF COMMON FORMS OF CRACKING IN CEMENTITIOUS SCREEDS

Aggregate is usually 0–4 mm and is mixed with cement in the ratio of 1:3 or 1:4 cement to sand, depending on strength requirements and drying requirements. For total screed thicknesses in excess of 50 ...

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Carbonation of Reinforced Concrete

Carbonation is the single most common cause of reinforcement corrosion in above ground structures and although many construction professionals and contractors are familiar with the progression of carb ...

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