Effect of Composition of Cementitious Materials on Alkalinity of Pore Solution and Strength of Cement Paste

Abstract:

Alkalinity of the surroundings is the basis to study the MICP technology. Alkalinity of pore solution and strength of cement paste made of various cementitious materials were studied. Results show that the alkalinity of pore solution of cement paste decreased with the increase of sulpho-aluminate cement content. pH value of cement paste was about less than 10 when sulpho-aluminate cement content exceeded 75%. Incorporation of sulpho-aluminate cement decreased compressive strength of paste obviously; however, compressive strength of paste was improved when the addition of sulpho-aluminate cement was more than 75%. Addition of mineral admixtures reduced the alkalinity of pore solution of cement paste and increased its compressive strength. Compressive strength of specimens was decreased when the content of mineral admixtures increased.

• Periodical: Advanced Materials Research (Volumes 671-674)
• Pages: 1732-1735
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.671-674.1732
• Online since: March 2013
• Authors: Xiao Lu Yuan*, Shi Hua Zhou, Dong Mei Liu
• Keywords: Alkalinity, Cementitious Material, MICP, Mineral Admixture

References

[1] C. Jimenez-Lopez, C. Rodriguez-Navarro, et al. Consolidation of degraded ornamental porous limestone stone by calcium carbonate precipitation induced by the microbiota inhabiting the stone [J]. Chemosphere, 2007, 68: 1929-(1936).

DOI: 10.1016/j.chemosphere.2007.02.044

[2] P. Ghosh, S. Mandal, B.D. Chattopadhyay, S. Pal. Use of microorganism to improve the strength of cement mortar [J]. Cement and Concrete Research, 2005, 35: 1980-(1983).

DOI: 10.1016/j.cemconres.2005.03.005

[3] G. Le Me´tayer-Levrel, S. Castanier, et al. Applications of bacterial carbonatogenesis to the protection and regeneration of limestones in buildings and historic patrimony [J]. Sedimentary Geology, 1999, 126: 25-34.

DOI: 10.1016/s0037-0738(99)00029-9

[4] Carlos Rodriguez-Navarro, Manuel Rodriguez-Gallego, et al. Conservation of ornamental stone by Myxococcus xanthus-induced carbonate biomineralization [J]. Environmental Microbiology, 2003, 69(4): 2182-2193.

DOI: 10.1128/aem.69.4.2182-2193.2003

[5] Jan Dick, Wim De Windt, et al. Bio-deposition of a calcium carbonate layer on degraded limestone by Bacillus species [J]. Biodegradation, 2006, 17: 357-367.

DOI: 10.1007/s10532-005-9006-x

[6] Severine Anne, Olivier Rozenbaum, et al. Evidence of a bacterial carbonate coating on plaster samples subjected to the Calcite Bioconcept biomineralization technique [J]. Construction and Building Materials, 2010, 24: 1036-1042.

DOI: 10.1016/j.conbuildmat.2009.11.014

[7] Willem De Muynck, Nele De Belie, Willy Verstraete. Microbial carbonate precipitation in construction materials: A review [J]. Ecological Engineering, 2010, 36: 118-136.

DOI: 10.1016/j.ecoleng.2009.02.006

[8] Xiang LI, Peiyu YAN. Influence of Fly ash content on alkalinity of pore solution and microstructure of cement pastes [J]. Journal of building materials, 2010, 13(6): 787-791. (In Chinese).