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Compressive Strength Improvements of Cement-Based Composites Achieved with Additional Milling of Metakaolin

Authorized Users Only
2018
Authors
Ilić, Biljana
Mitrović, Aleksandra
Radonjanin, Vlastimir
Malešev, Mirjana
Zdujić, Miodrag
Conference object (Published version)
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Abstract
Kaolin from a Serbian deposit, having a high content of mica and quartz, disordered kaolinite and a high specific surface area, was used to prepare metakaolin (MK). The calcination at temperatures of 700 degrees C or 750 degrees C for 30 to 180 min resulted in MK having high pozzolanic activity, but also significant aglomeration of particles. In order to disperse aglomerates, MK was milled, which resulted in increased pozzolanic activity and reduced particle size. The effects of MK and additionally milled metakaolin (MKmill) on the composite strengths and microstructure of the pastes were compared. We prepared and investigated composites in which ordinary Portland cement (OPC) was replaced with 10% to 50% of MK or MKmill, as well as the representative samples of paste for determination of microstructure. Compressive strengths higher than the control were obtained for composites having up to 30% of MK and up to 40% of MKmill, respectively. Increase of composite strengths with MKmill was... more pronounced at lower cement replacement levels (10% and 20%). Compressive strength of composites containing agglomerated MK were satisfactory, which suggests that milling of MK, as well as purification of kaolin, may not be necessary.

Keywords:
Milling / Metakaolin / Cement-based composites / Calcination
Source:
Calcined Clays for Sustainable Concrete, 2018, 16, 212-218
Publisher:
  • Springer, Dordrecht
Funding / projects:
  • Utilization of by-products and recycled waste materials in concrete composites in the scope of sustainable construction development in Serbia: investigation and environmental assessment of possible applications (RS-36017)
  • Nanostructured Functional and Composite Materials in Catalytic and Sorption Processes (RS-45001)

DOI: 10.1007/978-94-024-1207-9_34

ISBN: 978-9402412062

ISSN: 2211-0844

WoS: 000454341000034

Scopus: 2-s2.0-85033714568
[ Google Scholar ]
4
1
URI
http://rims.institutims.rs/handle/123456789/350
Collections
  • Radovi istraživača / Researchers' publications
Institution/Community
Institut za ispitivanje materijala
TY  - CONF
AU  - Ilić, Biljana
AU  - Mitrović, Aleksandra
AU  - Radonjanin, Vlastimir
AU  - Malešev, Mirjana
AU  - Zdujić, Miodrag
PY  - 2018
UR  - http://rims.institutims.rs/handle/123456789/350
AB  - Kaolin from a Serbian deposit, having a high content of mica and quartz, disordered kaolinite and a high specific surface area, was used to prepare metakaolin (MK). The calcination at temperatures of 700 degrees C or 750 degrees C for 30 to 180 min resulted in MK having high pozzolanic activity, but also significant aglomeration of particles. In order to disperse aglomerates, MK was milled, which resulted in increased pozzolanic activity and reduced particle size. The effects of MK and additionally milled metakaolin (MKmill) on the composite strengths and microstructure of the pastes were compared. We prepared and investigated composites in which ordinary Portland cement (OPC) was replaced with 10% to 50% of MK or MKmill, as well as the representative samples of paste for determination of microstructure. Compressive strengths higher than the control were obtained for composites having up to 30% of MK and up to 40% of MKmill, respectively. Increase of composite strengths with MKmill was more pronounced at lower cement replacement levels (10% and 20%). Compressive strength of composites containing agglomerated MK were satisfactory, which suggests that milling of MK, as well as purification of kaolin, may not be necessary.
PB  - Springer, Dordrecht
C3  - Calcined Clays for Sustainable Concrete
T1  - Compressive Strength Improvements of Cement-Based Composites Achieved with Additional Milling of Metakaolin
EP  - 218
SP  - 212
VL  - 16
DO  - 10.1007/978-94-024-1207-9_34
ER  - 
@conference{
author = "Ilić, Biljana and Mitrović, Aleksandra and Radonjanin, Vlastimir and Malešev, Mirjana and Zdujić, Miodrag",
year = "2018",
abstract = "Kaolin from a Serbian deposit, having a high content of mica and quartz, disordered kaolinite and a high specific surface area, was used to prepare metakaolin (MK). The calcination at temperatures of 700 degrees C or 750 degrees C for 30 to 180 min resulted in MK having high pozzolanic activity, but also significant aglomeration of particles. In order to disperse aglomerates, MK was milled, which resulted in increased pozzolanic activity and reduced particle size. The effects of MK and additionally milled metakaolin (MKmill) on the composite strengths and microstructure of the pastes were compared. We prepared and investigated composites in which ordinary Portland cement (OPC) was replaced with 10% to 50% of MK or MKmill, as well as the representative samples of paste for determination of microstructure. Compressive strengths higher than the control were obtained for composites having up to 30% of MK and up to 40% of MKmill, respectively. Increase of composite strengths with MKmill was more pronounced at lower cement replacement levels (10% and 20%). Compressive strength of composites containing agglomerated MK were satisfactory, which suggests that milling of MK, as well as purification of kaolin, may not be necessary.",
publisher = "Springer, Dordrecht",
journal = "Calcined Clays for Sustainable Concrete",
title = "Compressive Strength Improvements of Cement-Based Composites Achieved with Additional Milling of Metakaolin",
pages = "218-212",
volume = "16",
doi = "10.1007/978-94-024-1207-9_34"
}
Ilić, B., Mitrović, A., Radonjanin, V., Malešev, M.,& Zdujić, M.. (2018). Compressive Strength Improvements of Cement-Based Composites Achieved with Additional Milling of Metakaolin. in Calcined Clays for Sustainable Concrete
Springer, Dordrecht., 16, 212-218.
https://doi.org/10.1007/978-94-024-1207-9_34
Ilić B, Mitrović A, Radonjanin V, Malešev M, Zdujić M. Compressive Strength Improvements of Cement-Based Composites Achieved with Additional Milling of Metakaolin. in Calcined Clays for Sustainable Concrete. 2018;16:212-218.
doi:10.1007/978-94-024-1207-9_34 .
Ilić, Biljana, Mitrović, Aleksandra, Radonjanin, Vlastimir, Malešev, Mirjana, Zdujić, Miodrag, "Compressive Strength Improvements of Cement-Based Composites Achieved with Additional Milling of Metakaolin" in Calcined Clays for Sustainable Concrete, 16 (2018):212-218,
https://doi.org/10.1007/978-94-024-1207-9_34 . .

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