Experimental Research and Application of Super-Retarding Mortar

Abstract:

In scores of experiments indicates that the super-retarding mortar, keeping plasticity long-term, can make cement setting and hardening at a slower speed through chemical additive. Based on large numbers of orthogonal tests and theoretical analyses, the super-retarding mortar which satisfies the demands of actual engineering was developed successfully in present paper. And it is consist of cement, sand, water and composite retarder blended in an appropriate rate. From 0°C to 40°C, setting time can be adjusted from 1 day to 22 days in the light of to the engineering requirements, and after condensation, it begins to harden gradually and ends with the compression strengthen over 30MPa. Experiments were employed to test the influences of accession amounts of composite retarder dosage on setting time and compression strengthen of super-retarding mortar. Besides, the retarding mechanism was studied, and the super-retarding mortar was applied to experimental models. The results show the super-retarding mortar can be applied to the actual engineering, and it can be treated as the theoretical reference for the actual project application of the new prestressed concrete system.

• Periodical: Applied Mechanics and Materials (Volume 847)
• Pages: 10-16
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.847.10
• Online since: July 2016
• Authors: Xin Feng*, Xian Yan Zhou
• Keywords: Compression Strength, Experiment Research, Mortar, Setting Time, Super-Retard-Setting

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