Effect of Bactericide on the Deterioration of Concrete Against Sewage

Antimicrobial concrete for smart and durable infrastructures: A review

“…As it can be seen in Fig. 9 , there is an apparent difference in mass losses in specimens with various bactericides and without adding any bactericide, the mass loss rate of concrete specimen with copper phthalocyanine was the lowest (4.78%) as compared to other specimens, providing evidence that copper phthalocyanine has the best effect on resistance to the microbial induced corrosion of concrete [62] . Bao [67] reported that the mass loss of reference mortars and mortars added with mineral powder and fly ash was 1.26, 0.44 and 0.47% after an immersion in intensified sewage for 5 months, respectively.…”

“…The phthalocyanine compound [11] can be dispersed uniformly in concrete or mortar by a blending agent selected from a group consisting of an air entraining agent, a water reducing agent, and a viscosity increasing agent. Liquid bactericides like dimethyl benzyl ammonium chloride can be made into powder adsorbed by carrier such as zeolite [23] , [62] . In addition, heavy metal antibacterial agents are usually fixed on zeolites by means of adsorption or ion exchange [27] , [51] , [63] .…”

“…Furthermore, Kong et al [62] , [65] conducted an investigation to evaluate the impact of adding five bactericides in concrete towards the selected bacteria (as listed in Table 1 ), and to study their applicability for controlling and preventing microbial corrosion of concrete. They reported that concrete with sodium bromide and zinc oxide exhibited excellent antimicrobial property towards the tested bacteria, especially Bacteroidetes, as the number of microbial populations decreased substantially.…”

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Fig. 3 CLSM images of the distribution of dead/live cells within biofilm attached to concretes: (a) plain concrete without bactericide; (b) concrete with dodecyl dimethyl benzyl ammonium chloride; (c) concrete with sodium bromide; (d) concrete with zinc oxide; (e) concrete with sodium tungstate; and (f) concrete with copper phthalocyanine [62] . Note: living and dead cells are displayed in green and red, respectively, under blue light.

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“…It is worthwhile noting that some organic antimicrobial agents are extremely suitable to add into concrete due to their antimicrobial power to combat against diverse microbes, rather than only a single type of microbe. For example, Kong et al [62] found that concrete added with copper phthalocyanine exhibited outstanding antimicrobial effect with high bactericidal rates towards Bacteroidetes (90.82%) and Proteobacteria (64.25%), and the bactericidal rate towards all tested microbes is as high as 82.59%. The number of live cells within the biofilm attached to concrete added with copper phthalocyanine showed a significant drop, and the content of live cells was only 12% of that attached to plain concrete.…”