Repair Effect and Self-healing Performance of Patch Repair Materials Containing Amino Acid
It has been reported that concrete containing arginine, a kind of amino acid, could promote the growth of microalga on concrete surface during the setting in marine environment, which would improve the habitat for fishes in the sea.On the other hand, the basic property of arginine can increase the hydroxide ion concentration in the pore solution of concrete, which contributed to improve the protection performance against steel corrosion in concrete.Considering this background, in this study, the influence of arginine dosage into the patch repair materials applied for the concrete structures located in marine environment on the repair effect against the chloride-induced steel corrosion in concrete was investigated by using RC joint specimens simulating the joint part of concrete and repair materials.Moreover, the self-healing performance of repair materials containing not only arginine but also fly ash and gypsum was investigated by the immersion of crack-introduced specimens into heated water (40 ℃).As a result, the dosage of arginine improved the protection performance of repair materials against chloride-induced corrosion including the cases of the crack-introduced specimens.The closing rate of introduced cracks in the repair materials was promoted by the combination of fly ash mixing and the dosage of arginine during the immersion into the heated water.
Amino acid Fly ash Self-healing Patch repair effect Closure of cracks
S.Taniguchi T.Ueda T.Iiboshi A.Eriguchi
Tokushima University, Tokushima, Japan Nikken Kogaku co., Tokyo, Japan Taiheiyo Cement co., Tokyo, Japan
国际会议
福州
英文
1129-1135
2018-11-04（万方平台首次上网日期，不代表论文的发表时间）