Effect of kaolin treatment temperature on mortar chloride permeability
DOI:
https://doi.org/10.3989/mc.2007.v57.i285.39Keywords:
metakaolin, mortars, durability, capillary absorption, chloride permeabilityAbstract
The present paper discusses the results of chloride resistance tests conducted on ordinary Portland cement (OPC) mortars containing a Colombian kaolin pre-treated at temperatures of from 600 to 800 ºC. The resulting metakaolin (MK) was added to OPC mortar mixes in proportions of 10 and 20% by cement weight. The mortars were compared for physical and chemical properties, including capillary absorption, chloride permeability and pore microstructure as assessed by mercury porosimetry. The best performance was recorded for the samples containing 20% of the material treated at 800 ºC.
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