TY - GEN
T1 - Potential of applying bacteria to heal cracks in concrete
AU - Wang, J. Y.
AU - Van Tittelboom, K.
AU - De Belie, N.
AU - Verstraete, W.
PY - 2010
Y1 - 2010
N2 - Concrete is a construction material that is used world-wide because of its first-rate properties. However, the drawback of this material is that it easily cracks due to its low tensile strength. As large costs are involved in crack repair, the potential of self-healing of these cracks by means of calcium carbonate (CaCO 3) precipitating bacteria was investigated in this study. First, the survival of the bacteria was tested. Next, the optimal concentrations of bacterial cells, urea and Ca 2+ were determined in order to obtain a maximum amount of CaCO 3 precipitation. Finally, self-healing of cracks in mortar specimens, by means of bacteria, was investigated. Glass tubes, containing the healing agent were provided inside the mortar matrix. Upon crack occurrence, the tubes break and the healing agent, consisting of a filler material and bacteria, is released into the crack and can cause crack repair. Strength regain up to 60% was thus observed due to self-healing.
AB - Concrete is a construction material that is used world-wide because of its first-rate properties. However, the drawback of this material is that it easily cracks due to its low tensile strength. As large costs are involved in crack repair, the potential of self-healing of these cracks by means of calcium carbonate (CaCO 3) precipitating bacteria was investigated in this study. First, the survival of the bacteria was tested. Next, the optimal concentrations of bacterial cells, urea and Ca 2+ were determined in order to obtain a maximum amount of CaCO 3 precipitation. Finally, self-healing of cracks in mortar specimens, by means of bacteria, was investigated. Glass tubes, containing the healing agent were provided inside the mortar matrix. Upon crack occurrence, the tubes break and the healing agent, consisting of a filler material and bacteria, is released into the crack and can cause crack repair. Strength regain up to 60% was thus observed due to self-healing.
UR - https://www.scopus.com/pages/publications/80052906345
M3 - 会议稿件
AN - SCOPUS:80052906345
SN - 9781450714907
T3 - 2nd International Conference on Sustainable Construction Materials and Technologies
SP - 1807
EP - 1818
BT - 2nd International Conference on Sustainable Construction Materials and Technologies
T2 - 2nd International Conference on Sustainable Construction Materials and Technologies
Y2 - 28 June 2010 through 30 June 2010
ER -