Study on the Calcinations of Recycled Cement Clinker Using Waste Concrete and Waste Clay Brick

Abstract:

Utilizing construction waste, mainly waste concrete, to produce recycled cement, provides possibility for realizing the closed circulation between concrete and cement, which is an effective way for sustainable development of cement and concrete industry. Waste clay brick (WCB) and its surface-coated waste mortar are inevitably introduced into the raw meals while waste concrete is used in cement production. So on the basis of the composition characteristics of construction waste, considering of optimizing the performance of recycled cement and improving the adaptability of recycled cement to complex raw material, it's necessary to study the effect of raw meal mixing waste concrete and WCB on sintering process and property of recycled cement clinker. Mixing waste concrete and WCB in three different proportions, the burnability of raw meal, clinker mineral composition, clinker mineral morphology and hydration characteristics of recycled cement have been studied in this paper. The results indicate, the presence of WCB is beneficial for the generation and development of silicate minerals; with increasing proportion of WCB, the content of f-CaO in recycled cement clinker rises, the structure of C-S-H gel from hydration product presents higher densification and the compression strength of 3d and 28d curing period are enhanced.

• Periodical: Key Engineering Materials (Volumes 629-630)
• Pages: 337-342
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.629-630.337
• Online since: October 2014
• Authors: Hong Mei Ai*, Su Feng Zhu
• Keywords: Hydration, Recycled Cement, Sintering, Waste Clay Brick, Waste Concrete

References

[1] HM. Ai, F. Yan, and LD. Han: The Research Progress on Resource Utilization of Waste Clay Bricks (Research & Application of Building Materials, China 2012).

[2] A. Naceri and M.C. Hamina: Use of Waste Brick as a Partial Replacement of Cement in Mortar (Waste Management, England 2009).

DOI: 10.1016/j.wasman.2009.03.026

[3] H. Böke, S. Akkurt, et al: Characteristics of Brick Used as Aggregate in Historic Brick-lime Mortars and Plasters (Cement and Concrete Research, England 2006).

DOI: 10.1016/j.cemconres.2006.03.011

[4] S. Wild: Observations on The Use of Ground Waste Clay Brick as a Cement Replacement Material (Building research and information, England 1996).

[5] K.L. Lin, H. Hsien, et al: Recycling Waste Brick From Construction and Demolition of Buildings as Pozzolanic Materials (Waste Management and Research, England 2010).

[6] V. Corinaldesi, M. Giuggiolini and G. Moriconi: Use of Rubble From Building Demolition in Mortars (Waste Management, England 2002).

DOI: 10.1016/s0956-053x(02)00087-9

[7] A.M. Amin: Recycle of Wastes of Clay Brick Industry for Producing Eco-cement (Proceedings of the Tenth International Conference for Enhanced Building Operations, Kuwait 2010).

[8] ZG. Quan: The study on Resource Utilization Technology of Construction Waste From Earthquake and its Application in the Reconstruction (Block-Brick-Tile, China 2008).

[9] YE. Miao and LC. Wang: Recycling Methods for Waste Bricks and Tiles From Building Demolition (Journal of Shanghai University of Electric Power, China 2009).

[10] XQ. Liu and BB. Wang: Application of Construction Waste in Cement Production Process (Create Living, China 2011).

[11] XY. Zhan, in: Modern Bricks: Communication Between the Bricks Sintering Process and Sustainable Development of Construction, edited by China architecture and building press, Beijing (2009), in press.

[12] SS. Meng, ZD. Tao, et al: Study on Burning Clinker Using the Matrix Bonding Component in Waste Concrete as a Raw Material Component (Cement Engineering, China 2006).

[13] JS. Zheng and CY. Li: Effect of Demolished Concrete on Formation Kinetics of C3S (Environmental Science and Technology, China 2012).