Influence of Temperature on the Absorption Behaviour between Cement and Asphalt Emulsion in CA Mortar

Abstract:

Cement asphalt mortar (CA mortar) is a highly flowable grouting material used in the slab track structure. Temperature significantly influences the workable time of CA mortar. The workable time of CA mortar is controlled by the adsorption of asphalt droplets in the emulsion on cement grains. In the present study, the absorption behaviours under different temperatures were investigated to reveal the influences of temperature on workable properties of CA mortar. A laser particle size analyzer was employed to characterize the particle size variation in the cement and asphalt emulsion (CAE) system. The results indicated that the particle size increased more prominently at elevated temperature; The viscosity of the CAE system was measured by a rotational viscometer, results indicated that variation pattern of viscosity correlated well with that of the particle size in the CAE system and the increase of particle size was partially accountable for the increase of viscosity and impairing the flowability of CA mortar; the workable properties of CA mortar were also investigated, results showed that the slump flow increased and the workable time decreased with the increase of temperature. The addition of non-ionic emulsifier could retard the adsorption behaviour between cement and asphalt and prolong the workable time of CA mortar.

• Periodical: Advanced Materials Research (Volumes 295-297)
• Pages: 939-944
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.295-297.939
• Online since: July 2011
• Authors: Yun Peng Liu, Fa Zhou Wang
• Keywords: Adsorption Behaviour, CA Mortar, Temperature, Workable Time

References

[1] Harada Y TS, Itai N: Quart Rep RTRI (Railway Technical Research Institute). Vol.15 (1983), p.62

[2] Esveld C: European Railway Review Vol.2 (2003), p.81–85

[3] SG Hu, FZ Wang: Proceedings of the 6th Asian symposium on polymers in concrete (2009), pp.530-538

[4] Fazhou Wang, Zhichao Liu, Tao Wang: ACI Materials Journal Vol. 107(2010), pp.27-30

[5] Xiangming Kong, Yongliang Liu，Peiyu Yan: Journal of the Chinese ceramic society Vol. 38(2010), pp.553-558(In Chinese)

[6] Fazhou Wang, Zhichao Liu, and Shuguang Hu: Materials and Structures Vol. 43(2009), pp.493-498

[7] Masood, Irshad, Agarwal, S.K., Sinha, U.N:Cement and Concrete Research Vol. 24(1994), pp.527-532

[8] Su,Z., Bijen J.M.J.M, Fraaij A.L.A: Materials Research Society Symposium Proceedings Vol. 289, (1993), pp.199-204

[9] Shuguang Hu Tao wang, Fazhou wang: Advances in Cement Research Vol. 20(2008), pp.1-4