Polymer admixture for use with concrete repair mortars

Description

Ronafix admixture improves the physical properties of sand/ cement mortar mixes, making them stronger and more durable.  Water permeability of Ronafix Mix A  and Ronafix Mix D is extremely low, providing excellent resistance to frost.  Ronafix Mix D has excellent resistance to ingress of carbon dioxide gas, ensuring long term protection against reinforcement corrosion.  Typical compressive strength of Ronafix Mix D is ≥ 50N/mm2, flexural and tensile strengths are considerably better than unmodified mortar.  The compressive modulus is similar to that of lower strength concrete, reducing stress on the parent concrete.  Properties imparted by Ronafix admixture remain unaffected for many decades and accelerated ageing tests suggest that flexural and tensile strengths remain high after more than 100 years.

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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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