Browse > Article
http://dx.doi.org/10.7844/kirr.2020.29.1.53

The Fundamental Properties of Foamed Concrete as the Eco-friendly Ground Repair System for Cast in Site Using the CSA  

Woo, Yang-Yi (Research Center, AZ Co., Ltd.)
Park, Keun-Bae (Research Center, AZ Co., Ltd.)
Ma, Young (Jaeins Foundation Construction Co., LTD.)
Song, Hun-Young (Dongbu Engineering)
Publication Information
Resources Recycling / v.29, no.1, 2020 , pp. 53-61 More about this Journal
Abstract
This study aimed to develop a foam concrete material for a ground repair system that has low strength and low fluidity by using an eco-friendly binder, which substitutes industrial by-products for more than 90% of cement. Basic properties were evaluated after substituting a small amount of calcium sulfo aluminate (CSA) for the binder to improve the sinking depth rate and volume change, commonly found when it had a large amount of industrial by-products. The substitution rates of CSA for the eco-friendly binder used for the foam concrete were 2.5, 5, and 10%. Fresh properties, hardened properties, pore structure, and hydrates were analyzed. Experimental results showed that using only 2.5% of CSA could improve the deep sinking depth which occurred when using an eco-friendly binder. As a result, the weight difference between the upper, middle, and lower parts of cast specimens was improved even after being hardened. The addition of CSA also contributed to the formation of small, uniformly sized closed pores and improved initial strength. However, when the proportion of CSA increased, the long-term strength decreased. However, it satisfied the target strength when 5% or less of CSA was used. The results of this study revealed that it was possible to manufacture foam concrete with low strength and high fluidity for repairing ground satisfying target qualities by adding 2.5% of CSA to the eco-friendly binder containing a large amount of industrial by-products.
Keywords
foam concrete; CLSM(Controlled Low Strength Material); CFBC(Circulating Fluidized Bed Combustion) ash; quick-setting agent; ground repair system;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 ReSEAT Analysis Report, 2005 : Application of CLSM in Japan.
2 Yang-yi, Woo, Keun-bae, Park, 2019 : Study on optimum mixture of industrial by-products for lightweight foamed filler production by mixture experimental design, Journal of the Korean Recycled Construction Resources Institute, 7(1), pp.37-43.   DOI
3 Jinman, Kim, Eungu, Kwank, Kwangchin, Oh, et al., 2011 : Properties of Bubble According to Types and Concentrations of Concrete Foaming Agent, Journal of the Korea Concrete Institute, 23(2), pp.151-158.   DOI
4 Sunmi, Choi, Jinman, Kim, Dongyeop, Han, et al., 2016 : Hydration properties of ladle furnace slag powder rapidly cooled by air, Construction and Building Materials, 113, pp.682-690.   DOI
5 L, Coppola, D, Coffetti, E, Crotti, et al., 2018 : CSA-based Portland-free binders to manufacture sustainable concretes for jointless slabs on ground, Construction and Building Materials, 187, pp.691-698.   DOI
6 Xiaolu Guo, Huisheng Shi, Wenpei Hu, Kai Wu, 2014 : Durability and microstructure of CSA cement-based materials from MSWI fly ash, Cement and Concrete Composites, 46, pp.26-31.   DOI
7 Hayashido, Yasushi, Shinohara, Masaki, Yoshitake, Hideki, 2013 : Development of filler for underground cavities "SMART GROUT" using granulated blast furnace slag, JFE Research Journal 31, p.58.
8 Jeong-Ryol, Shin. Jae-Im, Park, An-Ho, Lee, et al., 2015 : Characteristics of light weight mixed soil using eco-friendly solidification material, Autumn Conference of the Korean Society of Railway.
9 Yong-Sun, Ryu, Jin-Gyu, Han, Woo-Ri, Chae, et al., 2016 : Development of rapid hardening backfill material for reducing ground subsidence, J. Korean Geosynthetics Society, 14(3), pp.13-20.   DOI
10 Guanghong, Sheng, Qin, Li, Jianping. Zhai, 2012 : Investigation on the hydration of CFBC fly ash, Fuel, 98, pp.61-66.   DOI
11 Korea Waste Association, 2017 : The Present Status of Waste Emission and Treatment in Korea.
12 Seunghyun, Lee, 2011 : Importance of the environment and recycling, www.ywca.or.kr >magicboard>labray.