EFFECT OF MICROBIAL PROTEIN ADDITIVE ON MICOSTRUCTURAL CHARACTERISTICS OF CONCRETE
Reinforcement corrosion and crack formation are the major causes of limiting thedurability or lifetime of concrete structures. A variety of additives or replacements of cementcan be applied in order to improve the durability of the concrete. Cracking causes earlydeterioration of concrete what can be minimized by microbial-induced sealing or plugging ofthe cracks. This study was designed to describe the impact of a novel microbial protein onstrength and microstmcture characteristics of cement paste and mortar. The results presentedin this article suggest that the novel microbial protein isolated from a Hot spring bacteriumcan be effective to increase the compressive strength and other physical properties of thecement paste and mortar. Microstructure analysis by ESEM and EDX show more hydration ofthe cement particles and increase of the calcium/silicon ratio of the CSH gel within the matrixin presence of the protein. The observed changes in micro-structural characteristics of theprotein-amended cement paste, particularly with respect to increased uniformity of the matrixcomponents, is reflected by strength improvement. This protein-amended cement-basedbiomaterial may be used for increasing durability and crack healing of concrete constructionsin the future.
Brajadulal Chattopadhyay Mousumi Biswas Saroj Mandal Henk M.Jonkers Guang Ye
Department of Physics,Jadavpur University,Kolkata,India Department of Civil Engineering,Jadavpur University,Kolkata,India Department of Civil Engineering & Geosciences - Microlab,Delft University of Technology,The Netherla
国际会议
南京
英文
263-271
2008-10-13（万方平台首次上网日期，不代表论文的发表时间）