A kind of bridge support anchoring mortar material and preparation method thereof

Abstract

The invention discloses a bridge bearing anchoring mortar material. The bridge bearing anchoring mortar material comprises the following components in percentage by weight: 30-35% of sulphate aluminumcement, 2-5% of Portland cement, 0.2-0.5% of a water reducing agent, 0.1-0.3% of an early strength agent, 0.2-0.5% of a retarder, 0.1-0.2% of a defoaming agent, 0.2-0.8% of an inorganic composite membrane and the balance of fine sand. On the basis of a traditional bridge bearing anchoring mortar material, the tailor-made inorganic composite membrane is added, no influences is made on the volume expansion in the early stage, while the expansion effect in the later stage an be dramatically lowered, meanwhile, the expansion rate different of internal and external different areas is very small, and the roadbed hump caused by influence of the expansion effect can be substantially eliminated; combination of a ultrathin titanium sheet and graphene is not only beneficial to even dispersion of theinorganic composite membrane, the graphene thin membrane is attached to the non-shielding face of the ultrathin titanium sheet, and the standard curing free expansion rate is smaller.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a bridge support anchoring mortar material and a preparation method thereof. Background technique [0002] In recent years, China's expressways have developed rapidly. In order to improve the quality and service life, it is required to use early-strength inorganic mortar materials with better durability in the support anchorage construction. [0003] However, most of the bridge bearings of the expressway are below the water level. Due to the erosion of water flow, coupled with the influence of other environmental factors such as geological and hydrological changes, and the vibration generated by vehicles, the concrete structure will be damaged, especially due to the expansion effect. Part of the road surface The bulge will not only increase the cost of the road surface during repair, but also cause very heavy pressure on traffic. [0004] Chinese invention patent CN101...

AI Technical Summary

Problems solved by technology

The mortar has the advantages of good fluidity, high early strength, no shrinkage in the later stage, and good expansion performance. However, the cost of the expansion agent and sand material used in the mortar material is expensive, and the amount of additive components used is high, which greatly increases Material cost, and contains chloride ions, which is harmful to the durability of mortar

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