Characteristics of fired clay bricks with waste marble powder addition as building materials

Fired clay bricks lightened by adding up to 35 wt% waste marble powder were produced by semi-dry pressing. The chemical composition, phase identification, thermal behaviour and microstructure of the raw materials were analysed by XRF, XRD, TGA and SEM, respectively. The brick mixtures containing dif...

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Bibliographic Details
Published in:Construction & building materials 2015-05, Vol.82, p.1-8
Main Authors: Sutcu, Mucahit, Alptekin, Hande, Erdogmus, Ertugrul, Er, Yusuf, Gencel, Osman
Format: Article
Language:English
Subjects:
Analysis
Bricks
Building materials
Clay minerals
Compressive strength
Construction materials
Firing
Marble
Mechanical properties
Porosity
Wastes
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Summary:Fired clay bricks lightened by adding up to 35 wt% waste marble powder were produced by semi-dry pressing. The chemical composition, phase identification, thermal behaviour and microstructure of the raw materials were analysed by XRF, XRD, TGA and SEM, respectively. The brick mixtures containing different proportions of waste marble powder were formed, dried and then fired at 950 and 1050 C for 2 h. Drying and firing shrinkages, loss on ignition, bulk density, porosity, water absorption, compressive strength, thermal conductivity, microstructure and phase content of the fired brick samples were determined. It was found that the use of waste marble powder addition reduced the bulk density of the samples. It was seen that their porosity ratios up to about 40% improved with increasing waste marble powder addition up to 30 wt% for all samples, whereas their compressive strengths decreased until 8.2 MPa. However, their strengths were adequate according to the values required by the standards. The thermal conductivity of the samples decreased from 0.97 to 0.40 W/mK. Increasing the firing temperature also affected their mechanical and physical properties. It was shown that waste marble powders could be used as a pore forming agent and contributed to the formation of crystalline phases in brick production at certain ratios.
ISSN:0950-0618
DOI:10.1016/j.conbuildmat.2015.02.055