Cementaid

EVERDURE CALTITE

Over 30 Years Proven Performance in:

SALT & MARINE ENVIRONMENTS


The rail bridge passes over the slag quenching pit salt water return channel. After more than 20 years exposure to this very severe environment, the EVERDURE CALTITE concrete is in excellent condition.
  Premature deterioration of concrete structures caused by chloride-induced corrosion is the most serious problem facing the construction industry. Concrete exposed to a marine environment, airborne salt and de-icing salts are all at risk.
Ordinary absorptive concrete and traditional protective measures have not provided adequate durability under actual field conditions.
The primary problem is the absorption of salt water into the concrete matrix resulting in an accumulation of salts.
The EVERDURE CALTITE System makes concrete non-absorptive and impervious to water and contained salts. In this way, EVERDURE CALTITE provides a time proven system for the protection of concrete in salt and marine environments with a track record of 38 years.


1962:  Field trials were conducted by the Engineering and Water Supply Department in tidal salt pans in the desert regions of Southern Australia. Soil analysis showed very high levels of chloride and sulphate salts. These were found to cause rapid deterioration. After 30 years exposure in sabkha salt pan, EVERDURE CALTITE concrete has remained virtually unaffected. Otherwise similar ordinary Portland and sulphate-resisting cement concretes have all but disintegrated.

l965:  A reinforced concrete boat ramp was placed in two sections; one with and one without EVERDURE CALTITE.

By 1976, this dry dock had become severely deteriorated. EVERDURE CALTITE was used in the replacement concrete to ensure long term performance under such severe conditions.
The control concrete showed severe aggregate exposure as well as widespread cracking due to corrosion of reinforcement. The EVERDURE CALTITE section was found to be in excellent condition with no corrosion of reinforcement and no noticeable surface wear.



EVERDURE CALTITE concrete jacket around salt damaged bridge support. Morningside Bridge, Toronto, Canada.
1982: Concrete beams with and without EVERDURE CALTITE were suspended beneath a wharf in Western Australia to determine their relative durability. After more than 5 years of continual wetting and drying with sea water, cores were taken and chloride penetration measured.
In spite of cement contents of 400kg/m³, water/cement ratios of 0.4 and good curing before exposure, there had been significant chloride penetration into the control concretes. EVERDURE CALTITE was found to greatly reduce the quantity and depth of chloride penetration in spite of having received inferior curing than the control.


  
  



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