Properties of lime composites containing a new type of pozzolana for the improvement of strength and durability
作者： Eva Vejmelková , Martin Keppert , Pavla Rovnaníková , Zbyněk Keršner , Robert Černý
DOI: 10.1016/J.COMPOSITESB.2011.11.053
关键词: Pozzolana 、 Water transport 、 Compressive strength 、 Lime 、 Fracture mechanics 、 Fracture toughness 、 Materials science 、 Flexural strength 、 Composite material 、 Durability
摘要: Abstract The basic material characteristics, mechanical and fracture-mechanical properties, durability hydric parameters, thermal properties of several lime–pozzolana composites with different dosage the burnt Czech clay shale are investigated. Within studied range pozzolana:lime (P:L) ratio 0.2:2.3–1.7:0.8, mix P:L = 0.9:1.6 is found to be most effective solution. Its compressive strength, bending fracture toughness, energy up ten times higher, as compared reference lime composite without pozzolana addition, water transport parameters lower, vapor only about two freeze/thaw resistance significantly better, comparable. In a comparison lime–metakaolin composite, corresponding achieve similar its somewhat worse, absorption coefficient slightly diffusion Therefore, new have good potential used surface layers building structures instead any an alternative solution composites.
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