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Concrete with integrated structure and corrosion control functions
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A corrosion control and concrete technology, applied in the field of civil engineering materials, can solve problems such as harsh service environments, achieve broad application prospects and significant engineering practical value
Active Publication Date: 2021-11-09
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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At present, a large number of concrete projects with an investment of tens of billions or even hundreds of billions have been completed, are under construction or are under planning, such as the Hong Kong-Zhuhai-Macao Sea-crossing Bridge that has been opened to traffic, the Qiongzhou Strait Sea-crossing Bridge that is under planning, and the Bohai Sea-crossing bridge. Sea Bridge, etc. These super projects have extremely high requirements on the durability of the structure, but the service environment in which they are located is relatively harsh
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Embodiment 1
[0026] This embodiment provides a kind of concrete with structure and corrosion control function integrated, according to the mix ratio shown in Table 1, adopt the following method to prepare:
[0027] (1) Add sand, stone, cement, fly ash, mineral powder, carbon fiber, and zinc powder to the concrete mixer and stir for 2 minutes;
[0028] (2) After the mixture is evenly stirred, gradually add water and water reducing agent while stirring;
[0029] (3) After the addition is completed, stir for 2 minutes; pour the test piece, remove the mold 24 hours after forming, and perform standard maintenance on the formed concrete test piece.
[0030] Table 1 Concrete Proportion
[0031]
[0032] Test the concrete performance of the structure and corrosion control function of the present invention:
[0039] This embodiment provides a concrete with structure and corrosion control function integrated, which is prepared by the same method as in Example 1 according to the mix ratio shown below: 400 parts of cement, 75 parts of mineral powder, 700 parts of sand, 1000 parts of gravel, 150 parts of water, 1.5 parts of polycarboxylate superplasticizer, 15 parts of carbon fiber, and 3 parts of zinc powder.
[0040] The performance test is carried out according to the same detection method as in Example 1, and the results show that while achieving the effect of inhibiting or slowing down the corrosion of steel bars, it can still meet the requirements of the structure for its mechanical properties.
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Abstract
The invention discloses a concrete with integrated structure and corrosioncontrol function, which has the cathodecorrosioncontrol function of sacrificial anode for steel bars in the concrete structure. The raw materials are cement, fly ash, mineral powder, sand, gravel, water, polycarboxylate superplasticizer, chopped carbon fiber, and zincpowder. According to a certain ratio, it is prepared by stirring, vibrating, molding, and then curing for a certain period. Since carbon fiber has good electrical conductivity and zincpowder is more active than iron, carbon fiber and zinc powder are added to it during the concrete preparation process, thereby endowing the concrete with a sacrificial anodecathodic protection function, which can inhibit or slow down the corrosion of steel bars, and at the same time meet the structural requirements. requirements for its mechanical properties.
Description
technical field [0001] The invention belongs to the field of civil engineering materials, and relates to a concrete with integrated structure and corrosion control functions, in particular to a concrete which can slow down or reduce the corrosion of embedded steel bars. Background technique [0002] my country has been in and will be in the stage of large-scale infrastructure construction for a long time. At present, a large number of concrete projects with an investment of tens of billions or even hundreds of billions have been completed, are under construction or are under planning, such as the Hong Kong-Zhuhai-Macao Sea-crossing Bridge that has been opened to traffic, the Qiongzhou Strait Sea-crossing Bridge that is under planning, and the Bohai Sea-crossing bridge. Sea Bridge, etc. These super projects have extremely high requirements on the durability of the structure, but the service environment in which they are located is relatively harsh. It is estimated that about...
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