Abstract

In this paper, the engineering application of microbial self-healing concrete in ship lock engineering was studied. Researches including the design and batch preparation of microbial self-healing agent, and laboratory tests of microbial self-healing concrete were carried out. A class of self-healing agents containing microbial spores and calcium sources was designed and batch-produced by spray drying method, which was tested to show that the addition of self-healing agent in concrete has no significant effect on the performance of the concrete mixture and the development of the compressive strength of hardened concrete specimens. Then the self-healing agents were applied to the production of commercial concrete, and a corresponding microbial concrete production system was formulated. After applying the produced microbial self-healing concrete to the side wall of the ship lock, it was observed that the cracking of the concrete was completely healed after 60 days, and the leakage of the crack was effectively blocked. Thus microbial self-healing concrete is expected to be widely used in concrete crack self-healing in hydraulic environment.

摘要

本文研究了微生物自愈混凝土在船闸工程中的工程应用。开展了微生物自愈剂的设计与批量制备、微生物自愈混凝土的室内试验等研究。设计了一类含有微生物孢子和钙源的自愈剂，采用喷雾干燥法批量生产，试验表明在混凝土中添加自愈剂对混凝土拌合物性能无明显影响。以及硬化混凝土试件抗压强度的发展。然后将自愈剂应用到商品混凝土的生产中，并制定了相应的微生物混凝土生产体系。将生产的微生物自愈混凝土施用于船闸侧壁后，观察60天后混凝土裂缝完全愈合，裂缝渗漏得到有效阻断。因此微生物自愈混凝土有望在水力环境下的混凝土裂缝自愈中得到广泛应用。