DOI: 10.3724/SP.J.1249.2018.02132

Journal of Shenzhen University Science and Engineering (深圳大学学报理工版) 2018/35:2 PP.132-138

Properties of phosphate cement mortar as an anchorage adhesive

Organic anchoring adhesives have high binding strength with the concrete substrate, but poor interfacial compatibility. They cannot be used in structure reinforcement in high temperature environments due to poor high temperature resistance. In order to overcome the problems of organic binders, we modify the magnesium phosphate cement (MPC)to obtain a new type of anchoring adhesive by studying the effect of anchoring depth on the anchorage performance of MPC mortar. We test the anchoring effect of MPC mortar in the field according to both construction and drawing technology. The results show that the critical anchorage depth of steel bars in MPC mortar is 17.5 times the diameter of steel bars. In the range of critical anchorage depth, the relationship between the pulling force and the depth of anchorage is nonlinear. When anchor depth is larger than the critical value, the pulling force will no longer grow. In the field experiment, the ribbed steel bar is yielded, which embodies the excellent anchoring performance of MPC mortar.

Key words:building materials,phosphate cement mortar,anchorage depth,anchorage property,anchorage binder,the critical depth of anchorage

ReleaseDate:2018-03-20 15:26:56

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