Vibrating Mixing and the Improvement of Concrete Performance

Abstract:

Velocity gradient and low efficiency zone exist in the common forced mixing. The linear velocity of mixing is low, and the mixing time is long. The concrete has poor micro uniformity. The interface bonded strength and the durability are low. Based on the deficiency of common forced mixing, we put forward vibrating mixing technology and have successfully developed a device. The device adopts the method of forced mixing and vibrating mixing combined, which makes the material particle own certain vibrating frequency and present in vibrating status not only to destroy the sticky connection of mixture, but also reduce friction in materials to promote materials from clusters into uniform distribution. Meanwhile, the device improves micro uniformity and interface connection strength of concrete, and air content of concrete can reach above 3%. The mixing time is shorter and the cement dosage is fewer under the condition of invariable concrete strength.

• Periodical: Advanced Materials Research (Volumes 652-654)
• Pages: 1260-1264
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.652-654.1260
• Online since: January 2013
• Authors: Liang Qi Zhang, Zhong Xu Feng, Li Ping Zhao
• Keywords: Air Content, Compressive Strength, Concrete, Mechanic Engineering, Microstructure, Vibrating Mixing

References

[1] Zhongxu Feng, in: The Theory and Equipment of Mixing Concrete, edtied by People Transport Press in China (2001: 90-93).

[2] Zhongxu Feng, Jianwei Jiang, LIjuan Yu, in: Study about the Theory and Equipments of Concrete Vibrating Mixing, edtied by China Journal of Highway (1999, 12: 122-126).

[3] Lijun Zhao, in: Research on the Mixing Inefficient Zone of Concrete Mixer and Its Eliminating Methods. Xi'an, Chang'an University (2005).

[4] Yunshi Yao, in: Double Blade Mixer Parameter Optimization and Its Experimental Study. Xi'an, Chang'an University (2004).

[5] Zhongxu Feng, Weizhong Wang, in: The Methods of Reinforcing the Interface Strength of Concrete, edtied by Chang'an university journal (2009: 91-94).

[6] Portland Cement Association, in: Control of Air Content in Concrete, edtied by Concrete Technology Today (1998: 102-108).

[7] Lihua LV, in: Influence of Experiment Condition on Air Entrained Concrete, edtied by Concrete in China(2006: 14-16).

[8] Lei Zhang, in: Influence of Mixing Process on the Air Content of Concrete. Xi'an, Chang'an University (2010).