TY - CHAP
T1 - Metakaolin
AU - Wang, F.
AU - Kovler, K.
AU - Provis, J. L.
AU - Buchwald, A.
AU - Cyr, M.
AU - Patapy, C.
AU - Kamali-Bernard, S.
AU - Courard, L.
AU - Sideris, K.
N1 - Publisher Copyright:
© RILEM 2018.
PY - 2018
Y1 - 2018
N2 - Metakaolin (MK) is known to be a highly pozzolanic material that can be used in concrete. MK is usually produced by heating kaolin-containing clays, within the temperature range of about 600–900 ℃. This chapter summarizes the utilization of metakaolin in relevant worldwide standards, mainly in Europe and North America. The health, safety and environmental sustainability concerns on using metakaolin as a supplementary cementitious material are also addressed in this chapter. It is reported that MK incorporation has benefits on both early-age and long-term properties. On the other hand, this chapter also reports that the results of heat of hydration and rate of reaction in metakaolin-blended concrete are controversial and need further investigation. Overall, the optimum level of cement replacement by MK is around 10–20%, which provides concrete the maximum strength. Metakaolin appears to have an excellent potential as a supplementary cementitious material in structures made of high-performance concrete, because it controls deleterious expansion due to alkali-silica reaction in concrete (depending on the nature of the aggregate), and reduces the ingress of chloride by improving the microstructure and chloride binding behavior.
AB - Metakaolin (MK) is known to be a highly pozzolanic material that can be used in concrete. MK is usually produced by heating kaolin-containing clays, within the temperature range of about 600–900 ℃. This chapter summarizes the utilization of metakaolin in relevant worldwide standards, mainly in Europe and North America. The health, safety and environmental sustainability concerns on using metakaolin as a supplementary cementitious material are also addressed in this chapter. It is reported that MK incorporation has benefits on both early-age and long-term properties. On the other hand, this chapter also reports that the results of heat of hydration and rate of reaction in metakaolin-blended concrete are controversial and need further investigation. Overall, the optimum level of cement replacement by MK is around 10–20%, which provides concrete the maximum strength. Metakaolin appears to have an excellent potential as a supplementary cementitious material in structures made of high-performance concrete, because it controls deleterious expansion due to alkali-silica reaction in concrete (depending on the nature of the aggregate), and reduces the ingress of chloride by improving the microstructure and chloride binding behavior.
KW - High-performance concrete
KW - Metakaolin
KW - Properties
KW - Supplementary cementitious material
KW - Sustainability
UR - http://www.scopus.com/inward/record.url?scp=85045509362&partnerID=8YFLogxK
U2 - 10.1007/978-3-319-70606-1_5
DO - 10.1007/978-3-319-70606-1_5
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AN - SCOPUS:85045509362
T3 - RILEM State-of-the-Art Reports
SP - 153
EP - 179
BT - RILEM State-of-the-Art Reports
ER -