Evaluation of heat of hydration of concrete containing high volume palm oil fuel ash
Pozzolanic materials, either naturally occurring or artificially made, have long been in practice since the early civilization. In recent years, the utilisation of pozzolanic materials in concrete construction has become increasingly widespread, and this trend is expected to continue in the years ah...
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| Main Authors: | , |
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| Format: | Article |
| Published: |
Elsevier
2013
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1016/j.fuel.2012.10.020 http://dx.doi.org/10.1016/j.fuel.2012.10.020 |
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| Summary: | Pozzolanic materials, either naturally occurring or artificially made, have long been in practice since the
early civilization. In recent years, the utilisation of pozzolanic materials in concrete construction has
become increasingly widespread, and this trend is expected to continue in the years ahead because of
technological, economical and ecological advantages of the materials. One of the latest additions to the
ash family is palm oil fuel ash, a waste material obtained on burning of palm oil husk and palm kernel
shell as fuel in palm oil mill boilers, which has been identified as a good pozzolanic material. This paper
highlights test results on the performance behaviour of high volume palm oil fuel ash (POFA) in reducing
the heat of hydration in concrete. Four concrete mixes namely OPC concrete i.e. concrete with 100% OPC
as control, and high volume concrete i.e. concrete with 50%, 60% and 70% POFA were prepared, and the
temperature rise due to heat of hydration in all the mixes was recorded. It has been found that palm
oil fuel ash significantly reduced the total temperature rise in concrete. The result obtained and the observation
made clearly demonstrate that the high volume replacement of cement by palm oil fuel ash is
advantageous, particularly for mass concrete where thermal cracking due to excessive heat rise is of great
concern. |
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