Combined protective action of barnacles and biofilm on concrete surface in intertidal areas

被引：28

作者：

Chlayon, Tom ^{[1
]}

Iwanami, Mitsuyasu ^{[1
]}

Chijiwa, Nobuhiro ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Civil & Environm Engn, Meguro Ku, 2-12-1-M1-21 Ookayama, Tokyo 1528552, Japan

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2018年 / 179卷

关键词：

Biofilm; Barnacle; Concrete durability; SEM; Chloride attack; Microcrack; CHLORIDE PENETRATION; TRANSPORT-PROPERTIES; MARINE MICROORGANISMS; FIELD EXPERIMENTS; DRYING SHRINKAGE; SETTLEMENT; CEMENT; CRACK; RECRUITMENT; ORGANISMS;

D O I：

10.1016/j.conbuildmat.2018.05.223

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This study investigated the effect of biofilm and barnacles on the surface of concrete. The specimens were set in an intertidal environment and divided into two study groups: one whose bacterial film was removed, and the other whose bacterial film was left intact. The chloride migration test and EPMA (SEM-WDX) were used as the study methods. The findings suggest that barnacles pose no threat to concrete. On the contrary, barnacles and biofilm were found to improve concrete durability by attaching to the surface of the concrete and sealing underlying microcracks. Further, chloride diffusion rates were lowered due to crack-closing. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：477 / 487

页数：11

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