Influence of Magnesium Additive on Mechanical Properties of Microbe Cementitious Material
The influence of magnesium additive concentrations (i.e., 0.5, 1.5, 2.5, 3.5 mol/L and 4.5 mol/L) on the mechanical properties of microbe cementitious material was investigated. In addition, the mineral composition produced by microbe and microstructure of microbe cementitious material
was analyzed by X-ray diffraction and scanning electron microscopy. The results indicate that when the magnesium additive concentration is 2.5 mol/L, the microbe cementitious material has the denser microstructure with the lower porosity. The compressive strength could be superior. When the
magnesium additive concentration was rather low, the precipitated minerals induced by microbe in the microbe cementitious material were mainly calcite and Mg-calcite, and the morphology of precipitated minerals appeared mainly cauliflower shape. However, the magnesium additive concentration
is higher, the minerals were mainly monohydrocalcite and hydromagnesite, and the morphology was mainly ball cylindrical.
Keywords: hydromagnesite; magnesium additive; magnesium-calcite; microbe cementitous material; monohydrocalcite
Document Type: Research Article
Affiliations: School of Materials Science and Engineering, Jiangsu Key Laboratory of Construction Material, Nanjing 211189
Publication date: 01 November 2012
- Journal of the Chinese Ceramic Society (JCCS), published in Chinese and in English, is a comprehensive monthly periodical focused on the fields of inorganic and non-metallic materials. The main purpose of the JCCS is to report the latest creative achievements in research, production and design for ceramics, glass, cementing materials, refractory, artificial crystals and other non-metallic materials. JCCS is regarded as an important journal in inorganic and non-metallic materials sciences in China and has been awarded by China Association for Science and Technology. The full-text of papers in JCCS is also published by CNKI (China National Knowledge Infrastructure). JCCS is indexed in EI Compendex, CA( Chemical Abstracts) ,SA and Ж and more than 20 databases.
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