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

A technology of mortar material and bridge bearing, which is applied in the field of civil engineering, can solve the problems of high cost of expansion agent and sand, high content of additive components, damage to mortar durability, etc., and achieves reduction of expansion effect and free expansion of standard maintenance. The effect of low rate and guaranteed accuracy

Active Publication Date: 2019-04-05
冯丽霞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] An anchoring mortar material for a bridge support, which consists of the following components by weight percentage:

[0039] Sulphoaluminate cement 32%

[0040] Portland cement 3%

[0041] Water reducer 0.3%

[0042] Early strength agent 0.2%

[0043] Retarder 0.4%

[0044] Defoamer 0.15%

[0045] Inorganic composite film 0.5%

[0046] Fine sand balance.

[0047] The Portland cement is Portland cement with a cement strength grade equal to or higher than 42.5.

[0048] The water reducer is naphthalenesulfonate water reducer; the early strengthening agent is calcium formate, and the retarder is citric acid; the defoamer is a silicone defoamer.

[0049] The particle size of the fine sand is 1-3mm.

[0050] The main raw materials of the inorganic composite film are ultra-thin titanium sheet and graphene.

[0051] The mass ratio of the ultra-thin titanium sheet to graphene is 10:1.

[0052] The thickness of the ultra-thin titanium sheet is 10-50 μm.

[0053] The p...

Embodiment 2

[0070] An anchoring mortar material for a bridge support, which consists of the following components by weight percentage:

[0071] Sulphoaluminate cement 35%

[0072] Portland cement 2%

[0073] Water reducer 0.5%

[0074] Early strength agent 0.1%

[0075] Retarder 0.5%

[0076] Defoamer 0.1%

[0077] Inorganic composite film 0.8%

[0078] Fine sand balance.

[0079] The Portland cement is Portland cement with a cement strength grade equal to or higher than 42.5.

[0080] The water reducer is naphthalenesulfonate water reducer; the early strengthening agent is calcium formate, and the retarder is citric acid; the defoamer is a silicone defoamer.

[0081] The particle size of the fine sand is 1-3mm.

[0082] The main raw materials of the inorganic composite film are ultra-thin titanium sheet and graphene.

[0083] The mass ratio of the ultra-thin titanium sheet to graphene is 15:1.

[0084] The thickness of the ultra-thin titanium sheet is 10-50 μm.

[0085] The pr...

Embodiment 3

[0097] An anchoring mortar material for a bridge support, which consists of the following components by weight percentage:

[0098] Sulphoaluminate cement 30%

[0099] Portland cement 5%

[0100] Water reducer 0.2%

[0101] Early strength agent 0.3%

[0102] Retarder 0.2%

[0103] Defoamer 0.2%

[0104] Inorganic composite film 0.2%

[0105] Fine sand balance.

[0106] The Portland cement is Portland cement with a cement strength grade equal to or higher than 42.5.

[0107] The water reducer is naphthalenesulfonate water reducer; the early strengthening agent is calcium formate, and the retarder is citric acid; the defoamer is a silicone defoamer.

[0108] The particle size of the fine sand is 1-3mm.

[0109] The main raw materials of the inorganic composite film are ultra-thin titanium sheet and graphene.

[0110] The mass ratio of the ultra-thin titanium sheet to graphene is (8-15):1.

[0111] The thickness of the ultra-thin titanium sheet is 10-50 μm.

[0112] Th...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06
CPCC04B28/06C04B2201/50C04B7/02C04B2103/302C04B2103/14C04B2103/22C04B2103/50C04B14/06C04B14/34C04B14/024
Inventor 冯丽霞赵军辉于亚军苌伟涛程海维刘浩李志侠闫虎山张万里宋玉娟
Owner 冯丽霞
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