The influence of increased levels of limestone mineral addition used in combination with cement kiln dust on chloride ion penetration
- Publisher:
- RILEM
- Publication Type:
- Conference Proceeding
- Citation:
- RILEM International workshop on performance-based specification and control of concrete durability, 2014, pp. 167 - 174
- Issue Date:
- 2014
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|---|---|---|---|---|---|
| \\utsfs.adsroot.uts.edu.au\homes\staff\108848\Desktop\3b328a85abb051984910f9aabd309498.pdf | Published version | 1.2 MB |
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In 2010 the Australian cement standard, AS 3972 - General purpose and blended cement, increased the maximum mineral addition level to 7.5% from 5% and in addition allowed up to 5% of the mineral addition to be inorganic mineral materials derived from the clinker production process e.g. cement kiln dust. This paper will present the preliminary results of a research program that is investigating chloride ion ingress of mortar and concrete made with cement containing increased levels of mineral addition, where the mineral addition is a combination of limestone and cement kiln dust. The early results based on the Bulk Diffusion Test (ASTM C 1556/NT Build 443) and the Rapid Migration Test (AASHTO TP 64/NT Build 492) tests indicate that with a 10% mineral addition, based on limestone and 5% CKD, there does appear to be an increase in the rate of chloride penetration into mortar but the investigation will not be completed for at least another two years
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