Strength Properties of Activated Hwangtoh Mortars

Abstract:

Hwangtoh (loess) has pozzolanic properties that mean it can be used as a cement admixture when activated at high temperatures, and that it can be used in combination with building materials such as fly ash or blast furnace slag. This study aimed to analyze the relationship between the compressive strength and the brick bond strength of various mortars containing hwangtoh, and also to find the optimum mixing conditions for the use of hwangtoh. It was found that the mortars’ strength properties are significantly influenced by the water/cement ratio W/C and the activated hwangtoh substitution ratio. We recommend the following materials and mixing conditions: W/C 60%, a cement substitution ratio of activated hwangtoh of 20 ~ 25%, and the addition of 10% blast furnace slag to improve the compressive strength of such mortars.

• Periodical: Advanced Materials Research (Volumes 168-170)
• Pages: 709-715
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.168-170.709
• Online since: December 2010
• Authors: Dongsik Oh, Doheom Song, Seongseok Go
• Keywords: Activation, Hwangtoh, Mortar, Strength Property

References

[1] Seongseok Go: Experimental Investigation of Mortars using Activated Hwangtoh", Journal of Construction and Building Materials, Vol. 23 (2009), p.1438.

DOI: 10.1016/j.conbuildmat.2008.07.007

[2] Heeyong Choi: A Study on the Development of Hwangtoh Admixture for the Application of Cement Mortar, Journal of Architectural Institute of Korea, Vol. 16 (2000), p.95.

[3] Hyunchul Lee: A study on the Physical Properties of Mortar mixing Activated Hwangtoh, Journal of Architectural Institute of Korea, Vol. 23 (2007), p.77.