Chloride and Sulphate Resistance with SuperP
Chloride and Sulphate Resistance with SuperP
(OP)
Type 50 (5) cement is used for sulphate resistance. It is my understanding that this is not recommended for exposure to both sulphate and chloride attack.
The material I've spec'd is what we refer to as HSb which is a blended sulphate resistant concrete; the cementitious material is often made up using Type 10 (Normal) with as much as 25% flyash. This can achieve both the sulphate and chloride resistance.
The contractor wants to provide Type 50 and to minimise the cement content (cost) and achieve the max w/c ratio, he wants to prepare a mix with minimum slump and use superplasticiser to improve the flowability.
Is anyone aware of a problem with using superplasticers that will reduce sulphate and chloride resistance (other than checking with the superP supplier)?
Dik
The material I've spec'd is what we refer to as HSb which is a blended sulphate resistant concrete; the cementitious material is often made up using Type 10 (Normal) with as much as 25% flyash. This can achieve both the sulphate and chloride resistance.
The contractor wants to provide Type 50 and to minimise the cement content (cost) and achieve the max w/c ratio, he wants to prepare a mix with minimum slump and use superplasticiser to improve the flowability.
Is anyone aware of a problem with using superplasticers that will reduce sulphate and chloride resistance (other than checking with the superP supplier)?
Dik






RE: Chloride and Sulphate Resistance with SuperP
The contractor's approach to reduce the cement content and maximize the w-c ratio are not good for long term durability of the concrete.
RE: Chloride and Sulphate Resistance with SuperP
Dik
RE: Chloride and Sulphate Resistance with SuperP
RE: Chloride and Sulphate Resistance with SuperP