Effects of Shell and Calcium Carbonate on Properties of Portland Cement

Abstract:

Different amounts of shell and calcium carbonate were added into the Portland cement, their influences on the compressive strength, sulfate corrosion resistance, hydration heat and porosity of the hardened cement paste were studied. Results show that with the increasing of shell content, the compressive strength decreases, however, modest reduction; as the increase of calcium carbonate content, the strength first increases and then decreases, the compressive strength reaches the highest value when the content is 15%. After addition of shell and calcium carbonate, the initial hydration reaction rate accelerates, meanwhile the induction period and acceleration period are brought forward. With the raising of shell and calcium carbonate content, the corrosion resistance coefficient increases gradually, and the sulfate corrosion resistance increases as well. The proportion of the harmless hole which diameter is smaller than 50nm increases after adding the shell and calcium carbonate, it’s beneficial to improve the performance of concrete.

• Periodical: Advanced Materials Research (Volumes 450-451)
• Pages: 495-498
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.450-451.495
• Online since: January 2012
• Authors: Gui Yun Wang, Ling Chao Lu, Shou De Wang
• Keywords: CaCO₃, Corrosion Resistance Coefficient, Frost Resistance, Hydration Heat, Shell

References

[1] F Xiao, H. T. Cui and X J Chen: Bull Chin Ceram Soc. Vol. 29 (2010), p. (1303-1307) (In Chinese)

[2] C. M. Zhang, V S Ramachandran: J Chin Ceram Soc. Vol. 16 (1988), p. (16-23) (In Chinese)

[3] B. X. Ling, F. Chen: J Build Mater. Vol. 1 (1998), p. (186-191) (In Chinese)

[4] G Kakali, S Tsivilis, E Aggeli and M Bati: Cem Concr Res. Vol. 30 (2000), p. (1073-1077)

[5] P Jean, H Sophie and G Bernard: Cem Concr Compos. Vol. 2 (11999), p.(99-105)

[6] N. Li, J. Chang and L. C. Lu: J Build Mater. Vol. 9 (2006), p. (565-569) (In Chinese)