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Compound gel material special for marine concrete, production method and application thereof

A composite cementitious material and production method technology, applied in the field of building materials, can solve the problems of long-term and durable adverse effects of hardened concrete, uneven concrete mixture, insufficient mixing time, etc., and achieve the mechanical properties of slurry and chlorine resistance Improved ion erosion performance, high hydration activity, and increased density

Inactive Publication Date: 2017-07-07
CHINA RESOURCES CEMENT TECH RES DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the lack of special composite cementitious materials for marine concrete, it is necessary to carry out a large number of trial mixes before the construction of each specific project to determine the best matching ratio of various cementitious materials, and then to obtain the project required. Concrete mix ratio
At the same time, since the admixture is mixed in the mixing station, there may also be uneven concrete mixture due to insufficient mixing time, which will have an adverse effect on the long-term and durability of hardened concrete; Cementitious materials, thus causing quality accidents and other issues

Method used

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  • Compound gel material special for marine concrete, production method and application thereof
  • Compound gel material special for marine concrete, production method and application thereof
  • Compound gel material special for marine concrete, production method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] According to the ratio of two groups of composite cementitious materials as described in Table 1, mix and grind the clinker, gypsum and industrial waste according to the ratio until the specific surface area is 350m 2 / kg, grind the slag to a specific surface area of ​​450m 2 / kg, the two are mixed evenly to prepare two kinds of composite gelling materials.

[0034] Table 1 Proportion of composite cementitious materials

[0035]

[0036] The above two composite cementitious materials were used to prepare concrete according to different water-binder ratios, and the specific mixes are shown in Table 2.

[0037] Table 2 concrete mix ratio

[0038]

[0039] Table 3 shows the performance index and mechanical performance index of the concrete mixture prepared according to the formula in Table 1 and Table 2.

[0040] Table 3 The performance index and mechanical performance index of the prepared concrete mixture

[0041]

[0042] The data in Table 3 shows that conc...

Embodiment 2

[0044] In order to further compare the performance of the concrete prepared with the above two composite cementitious materials, a comparative test was carried out using the mix ratio of a key project of marine concrete constructed by a large state-owned enterprise in China. The test plan is shown in Table 4. The performance comparison of concrete Table 5 shows.

[0045] Table 4 Concrete mix ratio comparison test plan for a key project in China

[0046]

[0047] Table 5 Comparison of concrete mechanical properties and anti-chloride ion erosion performance

[0048]

[0049] The data in Table 5 shows that, under the condition that the proportion of sand and gravel, the ratio of water to cement, the total amount of cementitious material, and the properties of the controlled concrete mixture are all the same, they are all three components, and the composite cementitious material is used as the single cementitious material. The 3d strength of the concrete prepared by the mater...

Embodiment 3

[0051] In order to further determine the advantages of the special composite cementitious material for marine concrete proposed by the present invention, a domestic naval base key project marine concrete mix ratio was selected and a comparative test was carried out. The test scheme is shown in Table 6, and the performance comparison of concrete is shown in Table 7. Show.

[0052] Table 6 Comparison test plan of marine concrete mix ratio in a naval base

[0053]

[0054] Table 7 Comparison of concrete mechanical performance indicators and chloride ion corrosion resistance

[0055]

[0056] The data in Table 7 shows that the 3d strength of concrete prepared using the composite cementitious material of the present invention as a single cementitious material is nearly 6-14MPa higher than that of concrete prepared by conventional methods, and the 28d strength is at most 4-8MPa higher. Simultaneously, the electric flux of the concrete prepared by using the composite cementiti...

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Abstract

The invention discloses a compound gel material special for marine concrete, a production method and an application thereof. The compound gel material is prepared from 20-60% of clinker, 30-70% of granulated blast-furnace slag, 5-15% of gypsum and 5-30% of industrial residue. The method comprises the following steps: while producing, milling clinker, gypsum and industrial residue till the specific surface area is 320-380m2 / kg; milling the granulated blast-furnace slag into mineral powder with the specific surface area of not less than 420m2 / kg; uniformly mixing all the powder, thereby acquiring the compound gel material. Compared with the marine concrete prepared according to the traditional method, the high corrosion resistance marine concrete adopting the compound gel material provided by the invention has better working performance, mechanical property and chloride ion erosion resistance.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a special composite cementitious material for marine concrete which is adaptable to the seawater environment and has high resistance to chloride ion erosion, as well as its production method and application. Background technique [0002] At present, China's economy has developed into an export-oriented economy highly dependent on the ocean, and its dependence on marine resources and space has increased significantly. During the "Thirteenth Five-Year Plan" period, my country's Hainan Qiongzhou Strait cross-sea project, the Shenzhong Channel, and Sansha Construction and other super-large marine engineering constructions have started one after another. With the continuous advancement of my country's "Marine Power" and "One Belt, One Road" strategies, the market demand for marine concrete with excellent seawater erosion resistance will continue to increase. [0003] In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/153C04B7/36C04B28/08C04B111/24
CPCC04B7/153C04B7/36C04B28/082C04B2111/24C04B2201/50C04B18/12C04B14/06C04B2103/302Y02P40/10
Inventor 邓恺刘向阳李怀超马磊
Owner CHINA RESOURCES CEMENT TECH RES DEV
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