Browse > Article
http://dx.doi.org/10.5345/JKIBC.2019.19.4.299

Material Properties of Repair Mortar Considering Accelerator Type and Curing Conditions  

Shin, Seung-Bong (Department of Architectural Engineering, Chungnam National University)
Kim, Gyu-Yong (Department of Architectural Engineering, Chungnam National University)
Nam, Jeong-Soo (Department of Architectural Engineering, Chungnam National University)
Shin, Kyoung-Su (Department of Architectural Engineering, Chungnam National University)
Lee, Bo-Kyeong (Intelligent Construction Automation Center, Kyungpook National University)
Publication Information
Journal of the Korea Institute of Building Construction / v.19, no.4, 2019 , pp. 299-306 More about this Journal
Abstract
In general, repair mortar is used to rehabilitate underground communities, but difficulties are encountered in the execution of long-term construction due to spatial co-operatives. In this study, the engineering properties of repair mortar according to the curing condition and accelerator type were reviewed. The results showed that the aluminate, alkali-free and calcium-aluminate precipitates in the water curing conditions showed higher compressive strength at the beginning of age than mortar specimens under air curing conditions, and increased. Especially in CA and AF test specimen with cement mineral quick setting, a large amount of ettringite products were observed compared with AL, thus reducing the pore volume and increasing the strength of the compound by micro-filling effect were found.
Keywords
accelerator; compressive strength; repair mortar; curing conditions;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
연도 인용수 순위
1 Cho YI, Hong KN, Kim MS, Park JK. Effect of curing temperature on mechanical properties of polymer mortar for urgent repairing. Journal of the Korean Society of Safety. 2016 Oct;31(5):109-16. https://doi.org/10.14346/JKOSOS.2016.31.5.109   DOI
2 Kim JC, Ryu JH. Setting time and strength characteristics of cement mixtures with set accelerating agent for shotcrete. Journal of the Korean Concrete Institute. 2004 Feb;16(1):70-8. https://doi.org/10.4334/JKCI.2004.16.1.070   DOI
3 Kim HW, Yoo YS, Han JK, Chung CW. Evaluation on mechanical performance and chloride ion penetration resistance of on-site shotcrete made with slurry-type accelerator. Journal of the Korea Institute of Building Construction. 2018 Dec;18(6):507-15. https://doi.org/10.5345/JKIBC.2018.18.6.507   DOI
4 Won JP, Sung SK, Park CK, Cho YJ, Choi SW, Park HG. Evaluation of durability performance of wet-mixed shotcrete with powder types cement mineral accelerator. conference of korean concrete institute; 2004 Nov 6; Suwon, Korea. Seoul(Korea): Korean Concrete Institute; 2004. p. 254-7.
5 Song YS, Ryu JH, Lim HD. An experimental study on early strength of shotcrete. Journal of Korean Tunnelling Association. 2010 Jul;12(4):285-94.
6 Chung JS, Kang WD. An experimental study on evaluation of repair mortars with cac(calcium aluminate cement) for sewer pipe. Journal of the Korean Society Of Safety, 2012 Oct;27(4):68-75. https://doi.org/10.14346/JKOSOS.2012.27.4.068   DOI
7 Korea Concrete Institute. Shotcrete accelerator for quality standards, Standard specification for concrete. KCI-SC102 ;2010. Seoul (Korea): kimoondang; 2016. 215 p.
8 Lyu K, She W, Miao C, Chang H, Gu Y. Quantitative characterization of pore morphology in hardened cement paste via SEM-BSE image analysis. Journal of Construction and Building Materials. 2019 Mar 30;202:589-602. https://doi.org/10.1016/j.conbuildmat.2019.01.055
9 Chen X, Wu S, Zhou J. Influence of porosity on compressive and tensile strength of cement mortar. Journal of Construction and Building Materials. 2013 Mar;40:869-74. https://doi.org/10.1016/j.conbuildmat.2012.11.072   DOI
10 Paglia CS, Wombacher F, Bohni H. The influence of alkali-free and alkaline shotcrete accelerators within cement systems: I. characterization of the setting behavior. Journal of Cement and Concrete Research. 2001 May;31(6):913-8. https://doi.org/10.1016/S0008-8846(01)00509-9   DOI
11 Flores Viviant I, Pradoto GK, Moimni I, Kozhukhova M. The effect of sio2 nanoparticles derived from hydrothermal solutions on the performance of portland cement based materials. Journal of Frontier Structure Civil Engineering. 2017 Apr;11(4):436-45. https://doi.org/10.1007/s11709-017-0438-2   DOI
12 Kim SM, Shin JY, Ma SJ, Nam KW, Kim KH. An experimental study on performance of concrete with constituent materials of shotcrete. Journal of Korean Tunnelling Association. 2008 Mar;10(1):55-68. https://doi.org/10.1016/S0008-8846(01)00509-9
13 Niu D, Wang H, Wang Y. Effect of hydration aging and water binder ratio on microstructure and mechanical properties of sprayed concrete. Journal of Wuhan University of Technology-Mater. Sci. Ed. 2015 Aug;30(4):745-51. https://doi.org/10.1007/s11595-015-1222-6   DOI
14 Pan Z, Wang X, Liu W. Properties and acceleration mechanism of cement mortar added with low alkaline liquid state setting accelerator. Journal of Wuhan University of Technology-Mater. Sci. Ed. 2014 Dec;29(6):1196-200. https://doi.org/10.1007/s11595-014-1067-4   DOI
15 Rikard Y, Ulf J, Britt M, Itai P. Early hydration and setting of portland cement monitored by IR, SEM and vicat techniques. Journal of Cement and Concrete Research. 2009 May;39(5) 433-9. https://doi.org/10.1016/j.cemconres.2009.01.017   DOI