Influence of SBR Latex on the Formation of C-S-H in C₃S Paste

Abstract:

Tricalcium silicate (C3S) was synthesized at 1500oC using calcium carbonate and silicon oxide. The formation of the hydrates of C3S in the presence of 10% styrene-butadiene rubber (SBR) latex was evaluated. The morphology of the calcium silicate hydrate (C-S-H) was studied using SEM, and the calcium to silica ratio of the C-S-H was studied using EDS. The results show that the SBR latex forms film on the surface of the C3S particles and the C-S-H and delays the hydration of C3S. The C-S-H in the paste modified by SBR latex is shorter and thicker than that in the control at the same hydration time. After 1 day, the calcium to silica ratio of the modified paste is higher than that of the control.

• Periodical: Advanced Materials Research (Volume 687)
• Pages: 329-334
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.687.329
• Online since: April 2013
• Authors: Xu Bo Yue, Ru Wang
• Keywords: Calcium Silicate Hydrate (C-S-H), EDS, Morpholoy, SBR Latex, SEM, Tricalcium Silicate (C₃S)

References

[1] Y. Ohama, Polymer-based admixture, Cement and Concrete Composites. 20(1998) 189-212.

[2] S.Y. Zhong, Z. Chen, Properties of latex blends and its modified cement mortars, Cem. Concr. Res. 32(2002) 1515-1524.

DOI: 10.1016/s0008-8846(02)00813-x

[3] J. Mirza, M.S. Mirza, R. Lapointe, Laboratory and field performance of polymer-modified cement-based repair mortars in cold climates, Constr. Build. Mater. 16(2002) 365-374.

DOI: 10.1016/s0950-0618(02)00027-2

[4] R.Wang, P.M. Wang. The influence of SBR powder on the generation process of cement hydration products, China Ceramic Society (in Chinese). 36(2008) 0912-0919.

[5] R. Wang, P.M. Wang, Formation of hydrates of calcium aluminates in cement pastes with different dosages of SBR powder, Constr. Build. Mater. 25(2011) 736-741.

DOI: 10.1016/j.conbuildmat.2010.07.013

[6] S.Zeng, N.R. Short, C.L. Page, Early-age hydration kinetics of polymer-modified cement, Advances in Cement Research. 8(1996) 1-9.

DOI: 10.1680/adcr.1996.8.29.1

[7] R.Wang, X.G. Li, P.M. Wang, Influence of polymer on cement hydration in SBR-modified cement pastes, Cem. Concr. Res. 36(2006) 1744-1751.

DOI: 10.1016/j.cemconres.2006.05.020

[8] D.A. Silva, P.J.M. Monteiro, Analysis of C3A hydration using soft X-ray transmission microscopy: effect of EVA copolymer, Cem. Concr. Res. 35(2005) 2026-2032.

DOI: 10.1016/j.cemconres.2005.02.002

[9] Ł. Kotwica, J.Małolepszy, Chemical aspects of EVA redispersible powders influence on the hydration of tricalcium aluminate, in: Á. Palomo, A. Zaragoza, J.C.L. Agüí, Cementing a Sustainable Future XIII ICCC International Congress on the Chemistry of Cement, Editado por el Instituto de Ciencias de la Construcción "Eduardo Torroja", Madrid, 2011.

DOI: 10.21041/conpat2019/v1cc290cte

[10] J. Pourchez, P. Grosseau, B. Ruot, Current understanding of cellulose ethers impact on the hydration of C3A and C3A–sulphate systems, Cem. Concr. Res. 39(2009) 664-669.

DOI: 10.1016/j.cemconres.2009.05.009

[11] D.A. Silva, P.J.M. Monteiro, Hydration evolution of C3S–EVA composite analyzed by soft X-ray microscopy, Cem. Concr. Res. 35(2005) 351-357.

DOI: 10.1016/j.cemconres.2004.05.049

[12] D.A. Silva, P.J.M. Monteiro, The influence of polymers on the hydration of portland cement phases analyzed by soft X-ray transmission microscopy, Cem. Concr. Res. 36(2006) 1501-1507.

DOI: 10.1016/j.cemconres.2006.05.010