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Properties of Cementless Loess Mortar Using Eco-Friendly Hardening Agent
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 Title & Authors
Properties of Cementless Loess Mortar Using Eco-Friendly Hardening Agent
Jung, Yong-Wook; Kim, Sung-Hyun; Lee, Dong-Gyu;
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 Abstract
This study examined the fluidity and strength properties, water resistance, durability, and freeze-thaw of cementless loess mortar using an eco-friendly hardening agent. The experimental result indicates that 28 days compressive and flexural strength of the loess mortar was increased regardless of the weathered granite soil and loess mixture ratio as the replacement ratio of the hardening agent increases. The strengths were significantly increased until 14 days regardless of the hardening agent, while the effect on the strengths increasement was relatively low after 14 days. Thus, the strength development of loess mortar concrete was found to be faster than that of the normal concrete. In addition, when the hardening agent of 10% was used, the average flexural strength was 1.7MPa which is insufficient compared to the 28-day flexural strength of 4.5MPa for the paving concrete. However, the flexural strengths of the loess mortar concrete using the hardening agents of 20% and 30% were 4.0MPa and 5.3MPa, respectively. Thus, the hardening agent need to be at least 20% so that the loess mortar can be used for paving concrete. The experiment for water resistance shows that the repeated absorption and dry reduced mass regardless of the mixing ratio of the loess. The maximum length change also decreased with increasing the substitution rate loess mixture ratio and the hardening agent. The result of the freeze-thaw resistance test indicates that the relative dynamic modulus of elasticity at 300 cycle freeze-thaw with the hardening agents of 20% and 30% were 75% and 79%, relatively. Thus, the hardening agent of at least 20% is required to obtain the relative dynamic modulus of elasticity of 60% for the loess mortar.
 Keywords
Eco-friendly;Hardening agent;Cementless;Loess mortar;
 Language
Korean
 Cited by
 References
1.
Choi, H.Y., Hwang, H.Z., Kim, M.H., Kim, M.H. (2000). A study on the development of hwangtoh admixture for the application of cement mortar, Journal of the Architectural Institute of Korea Structure & Construction, 16(6), 95-102 [in Korean].

2.
Choi, W.H., Park, C.W., Jung, W.K., Kim, K.H. (2012). Fundamental properties of limestone powder added cement environmentfriendly concrete for concrete pavement, International Journal of Highway Engineering, 14(4), 37-49 [in Korean].

3.
Heo, J.O., Lee, J.G., Hyung, W.G. (2014). Properties of nonsintered hwangtoh mortar using eco-friendly inorganic binding material, Journal of the Korea Concrete Institute, 26(4), 499-506 [in Korean]. crossref(new window)

4.
Hwang, H.Z., Roh, T.H., Yang, J.H. (2007). A study on the proper mixing design of concrete with hwangtoh binder, Journal of the Architectural Institute of Korea Structure & Construction, 23(6), 73-80 [in Korean].

5.
Jung, Y.W., Lee, S.H., Jang, S.S., Yeo, I.D., Choi, J.O. (2010). Strength properties of loess mortar using eco-friendly loess binder, Journal of the Korea Concrete Institute, 22(1), 287-288 [in Korean]. crossref(new window)

6.
Kang, S.S., Lee, S.L., Hwang, H.Z., Cho, M.C. (2008). Hydration heat and shrinkage of concrete using hwangtoh binder, Journal of the Korea Concrete Institute, 20(5), 549-555 [in Korean]. crossref(new window)

7.
Kwon, Y.H., Kwon, Y.H., Lee, D.G. (2013). A study on the quality properties of alkali-activated cement free mortar using industrial by-products, Journal of the Korean Recycled Construction Resources Institute, 1(1), 58-66 [in Korean]. crossref(new window)

8.
Lee, B.K., Kim, G.Y., Kim, R.H., Yoon, M.H., Lee, Y.W. (2014). Evaluation of properties on dry shrinkage of floor dry-mortar with alpha-hemihydrate gypsum, Journal of the Architectural Institute, 34(2), 663-664 [in Korean].

9.
Lee, S.H., Jung, Y.W., Jang, S.S., Yeo, I.D., Choi, J.O. (2010). Strength properties of loess mortar using eco-friendly loess binder, Journal of the Korea Concrete Institute, 22(1), 285-286 [in Korean].

10.
Lee, T.G., Lee, J.Y., Song, M.J., Kim, S.W. (2013). The comparison of thermal characteristics of new Han-ok floor heating for applying modern On-dol system, KIEAE Journal, 13(3), 61-69 [in Korean].

11.
Yang, K.H., Hwang, H.Z., Kim, S.Y., Song, J.K. (2007). Development of a cementless mortar using hwangtoh binder, Building and Environment, 42(10), 3717-3725 [in Korean]. crossref(new window)