Study on Ultra-Strength Mortar Prepared with Mineral Admixture

Abstract:

In this paper, preparation, property study of ultra-strength mortars with mineral admixture and clear river sand was carried out. The mineral admixture include fly ash, ultra-fine GGBS and silica fume. The experimental results show that the compressive strength of mortar improves with increasing amount of silica fume or ultra-fine GGBS. When the content of silica fume or ultra-fine GGBS is 30~35%, the compressive strength and flexural strength of mortar in curing age of 7 days are 100 MPa and 20MPa, respectively. But strength of mortar decreases with the increase replacement rate of fly ash. When the mortar mixes with combined of silica fume and ultra-fine GGBS, the optimum proportion of siliaca fume to ultra-fine GGBS is 2:3. And the compressive strength of mortar in curing age of 7 days is 75~100MPa when the mixed mineral admixture is 40~60%. The compressive strength of mortar is about 90MPa as it mix 60% of cement, 15% of silica fume, 15% of GGBS and 10% of fly ash. Moreover, the ultra strength mortar refines its pore structure and its capiliary pore (≥100nm) amount reduces by 78% compared to ordinary mortar.

• Periodical: Materials Science Forum (Volumes 675-677)
• Pages: 1073-1076
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.675-677.1073
• Online since: February 2011
• Authors: Zu Quan Jin, Peng Zhang, Tie Jun Zhao, Bao Rong Hou
• Keywords: Mortar, Pore Structure, Silica Fume (SF), Ultra-Fine GGBS, Ultra-Strength

References

[1] Zhang Yunsheng, Sun Wei . Cement and Concrete Composites Vol. 30(2008), p.831.

[2] E. T. Dawood and M. Ramli. Construction and Building Materials Vol. 24(2010), p.1043.

[3] C. T. Liu and J.S. Huang. Construction and Building Materials Vol. 23(2009), p. (2072).

[4] H. Yazıcı, M. Y. Yardımc. Construction and Building Materials Vol. 23(2009), p.1223.

[5] M. Z An, L.J. Zhang and Q. X. Yi. Journal of China University of Mining and Technology Vol. 18(2008), p.279.

[6] V. Morin, F. C. Tenoudji and A. Feylessoufi. Cement and Concrete Research Vol. 32(2002), p. (1907).

[7] S. Aydın, H. Yazici and B. Baradan. Construction and Building Materials Vol. 22(2008), p.504.

[8] J. Hemant. Materials & Design Vol. 27(2006), p.657.

[9] Y. W. Chan, S. H. Chu. Cement and Concrete Research Vol. 34(2004), p.1167.

[10] C. D. Ati, A. Kiliç and U.K. Sevim. Cement and Concrete Research Vol. 34(2004), p.99.

[11] P. Chindaprasirt and S. Rukzon. Construction and Building Materials Vol. 22(2008), p.1601.

[12] T. C. Lee, W. J. Wang and P. Y. Shih. Cement and Concrete Research, Vol. 39(2009), p.651.