Durability properties of novel coating material produced by alkali-activated/cement powder

被引：30

作者：

Phiangphimai, Chattarika ^{[1
]}

Joinok, Gonganok ^{[1
]}

Phoo-ngernkham, Tanakorn ^{[1
]}

Damrongwiriyanupap, Nattapong ^{[2
]}

Hanjitsuwan, Sakonwan ^{[1
]}

Suksiripattanapong, Cherdsak ^{[3
]}

Sukontasukkul, Piti ^{[4
]}

Chindaprasirt, Prinya ^{[5
,6
]}

机构：

[1] Rajamangala Univ Technol Isan, Fac Engn & Technol, Dept Civil Engn, Sustainable Construction Mat Technol Res Unit, Nakhon Ratchasima 30000, Thailand

[2] Univ Phayao, Sch Engn, Dept Civil Engn, Phayao 56000, Thailand

[3] Rajamangala Univ Technol Isan, Fac Engn & Technol, Dept Civil Engn, Nakhon Ratchasima 30000, Thailand

[4] King Mongkuts Univ Technol North Bangkok, Fac Engn, Construct & Bldg Mat Res Ctr, Dept Civil Engn, Bangkok 10800, Thailand

[5] Khon Kaen Univ, Fac Engn, Sustainable Infrastruct Res & Dev Ctr, Dept Civil Engn, Khon Kaen 40002, Thailand

[6] Royal Soc Thailand, Acad Sci, Bangkok 10300, Thailand

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2023年 / 363卷

关键词：

Novel coating material; Alkali-activated; cement powder; Durability; Chloride migration coefficient; Half-cell potential; Corrosion probability of concrete; reinforcement; FLY-ASH GEOPOLYMER; PORTLAND-CEMENT; STRENGTH DEVELOPMENT; REINFORCED-CONCRETE; STEEL CORROSION; ACID RESISTANCE; SULFATE; MORTAR; DIATOMITE; BINDERS;

D O I：

10.1016/j.conbuildmat.2022.129837

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper presents a feasibility study on the use of alkali-activated/cement powder (AACP) paste as a potential coating material for improving the durability of structures and protecting buildings exposed to marine envi-ronments. The AACP was synthesized by geopolymer powder (GP), Portland cement (PC), and silica fume (SF). The water-to-binder ratio of 0.45 and sodium hydroxide solution of 2 M were used to activate the reaction products of the AACP paste. The experimental tests consisted of the retained compressive strength and weight change after exposure to 5 % sulfuric acid (H2SO4) solution, 5 % magnesium sulfate (MgSO4) solution, and tap water (H2O), and chloride migration coefficient (RCM). The corrosion probability of concrete reinforcement with surface treatment of deformed bar (DB) using the half-cell potential (HCP) test was also evaluated. Test results showed that the AACP paste exhibited superior durability to PC paste, as evidenced by its relatively low strength loss and weight change. In addition, the chloride diffusion coefficient of AACP pastes was 32.7 to 77.6 times lower than that of PC paste. For the corrosion probability of concrete reinforcement, the average HCP values of the AACP paste-treated-deformed bar were lower than those of the no-treated or PC paste-treated-deformed bar, especially for the AACP paste prepared by GP without PC.

引用

页数：11

共 60 条

[1] Reinforcement corrosion in concrete structures, its monitoring and service life prediction - a review [J].