Experimental Study of Activation the Reactivity of Waste Mortar

Abstract:

After the processes of crushing, screening and grinding, abandoned mortar powder can be used as a mineral admixture to replace cement. Physical-activating, alkali-activating and compound-activating have been used to stimulate the activity of abandoned mortar power. To get the mechanical properties and microstructure, compressive strength, flexural strength, XRD, TG-DTA and SEM were used. The results show that: Mechanical grinding and activator can greatly improve the activity of mortar power. Stimulating effect of compound activator was better than signal activator and it could promote further hydration of cement. The mortar which is stimulated by compound activator had higher strength than mortar by single activator. It can be seen from micro-test that the mortar with compound activator had more ettringite and other hydration products, and with compact structure.

• Periodical: Advanced Materials Research (Volumes 189-193)
• Pages: 1163-1168
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.189-193.1163
• Online since: February 2011
• Authors: Xiang Guo Li, Xue Feng Song, Bao Guo Ma, Shou Wei Jian
• Keywords: Alkali-Activating, Compound-Activating, Salt-Activating, Waste Mortar

References

[1] Jenni A, Holzer L, Zurbriggen R. Herwegh M, Influence of polymers on microstructure and adhesive strength of cementitious tile adhesive mortars. Cement Concrete Res. 2005(35): 35-50.

DOI: 10.1016/j.cemconres.2004.06.039

[2] Shuguang Hu, Yongjia He. The Effect of Regenerated Binding Materials on the Hydration System of Portland Cement. Journal of Wuhan University of Technology. Vol. 28, No. 10(Oct, 2006). (In Chinese).

[3] Chuntao Ma, Jianxia Song, Caibo Wang, Feng Zhang. Ningxia Engineering Technology. Vol. 8(2009), p.56. (In Chinese).

[4] Baoguo MA, Xiancheng HAO, Shouwei JIAN, Qin ZHANG. Activation analysis on powder of building waste [J]. China Building Materials Science and Technology, 2006, (4): 9-12. (In Chinese).

[5] Renyu Xiong, Xiaohong Wang. Concrete Admixtures [M]. Beijing: Chemical Industry Press，2002. 147. (In Chinese).

[6] Baoguo Ma, Yonghe Xu, Rongzhen Dong. Influence of Triethanolmine on the Initial Structure Formation and Mechanical Properties of Cement. Journal of Building Material. Vol. 9, No. 1(Feb, 2006).

[7] Alarcon-Ruiz L, Platret G, Massieu E, et al. The Use of Thermal Analysis in Assessing the Effect of Temperature on a Cement Paste[J]. Cement and Concrete Research, 2005, 35(3): 609-613. (In Chinese).

DOI: 10.1016/j.cemconres.2004.06.015

[8] Grattan-Bellew P E. Microstructural Investigation of Deteriorated Portland Cement Concretes[J]. Constructior Building Materiala, 1996, 10(1): 3-16.

DOI: 10.1016/0950-0618(95)00066-6

[9] Shuguang Hu, Yongjia He. Preparation of Regenerated Binding Material Using Waste Concrete. Journal of The Chinese Ceramic Society. Vol. 35, No. 5(May, 2007). (In Chinese).