Please use this identifier to cite or link to this item: https://www.um.edu.mt/library/oar/handle/123456789/84693
Title: Characterization of Libyan metakaolin and its effects on the mechanical properties of mortar
Authors: Borg, Ruben Paul
Hamed, Ahmed
Edreis, Ramadan
Mansor, Ali M.
Keywords: Building materials
Buildings -- Design and construction
Engineering -- Geology
Sustainable construction
Structural materials
Issue Date: 2018
Publisher: IOP Publishing Ltd
Citation: Borg, R. P., Hamed, A. M. M., Edreis, R., & Mansor, A. M. (2018). Characterization of Libyan metakaolin and its effects on the mechanical properties of mortar. FIB Conference: Sustainable Concrete: Materials and Structures. IOP Conference Series: Materials Science and Engineering, 442, 012005.
Abstract: Environmental concerns, stemming from high-energy demands and CO2 emission associated with cement manufacture, have brought about pressures to reduce cement consumption through the use of supplementary cementitious materials (SCMs). Besides addressing environmental concerns, the incorporation of SCMs in cement bound materials and concrete can modify and improve specific concrete properties. Metakaolin (MK) in an important SCM which can enhance the performance of cementitious composites through its high pozzolanic reactivity. This study was carried out to characterize the materials and to assess the effect of Libyan metakaolin (LMK) on the mechanical properties including the compressive strength of cement mortar. LMK was produced by calcining kaolinite clay at 700°C for 2 h. X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Differential Thermal Analysis / Thermo-Gravimetric analysis (DTA/TG) and Fourier Transform Infrared Spectroscopy (FTIR) s were performed on the raw and calcined kaolinite powders. Seven mixes were prepared with different LMK replacement percentages (0.0 to 30%), by weight of cement, and a constant water binder ratio (w/b) of 0.5. The specimens were cured for 3, 7, 28, 56 and 90 days. At the end of each curing period, the specimens were tested for compressive strength. The results confirm the transformation of kaolinite clay into metakaolin and the pozzolanic reactivity of the produced LMK and conforms to ASTM requirements in this respect. The study confirms that LMK could be effectively used in reducing cement content up to 30% by weight without compromising compressive strength of the cement mortar.
URI: https://www.um.edu.mt/library/oar/handle/123456789/84693
Appears in Collections:Scholarly Works - FacBenCPM



Items in OAR@UM are protected by copyright, with all rights reserved, unless otherwise indicated.