Immersed tube joint grouting concrete and a preparing method thereof

A concrete and grouting technology, which is applied in the field of grouting materials for underwater pipe joints of marine engineering and marine concrete mixtures, can solve the problems of non-dispersion, easy to be corroded by seawater, poor cohesion, etc., and achieve strong cohesion. , cost-effective, long service life

Inactive Publication Date: 2017-06-20
CCCC WUHAN HARBOR ENG DESIGN & RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages of ordinary concrete mortar in the prior art that it is difficult to meet the requirements of application in the complex environment of marine water bodies, the existing cohesion is poor, and it is easily corroded b

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Grouting concrete for immersed pipe joints consists of the following components by weight percentage: Grouting concrete for immersed pipe joints consists of the following components by weight percentage: 200kg Portland cement, 100kg fly ash, 75kg granulated blast furnace ore, 20kg limestone powder , 20kg coal gangue, 10kg zeolite powder, 40kg expansion agent, 1.5kg anti-dispersant agent, 2kg thickener, 156kg drinking water, 5.0kg polycarboxylate high-performance water reducer, 760kg natural sand, 980kg crushed stone, the sand Mix the stone evenly, add water and stir for 3 minutes after putting in the powder, and you can get the concrete for grouting. Ion diffusion coefficient 2.8×10 -12 m 2 / s, underwater non-dispersibility: cement loss 2.0%, suspended matter content 60mg / L, bleeding rate zero.

Embodiment 2-6

[0032] The grouted concrete for immersed pipe joints in this example is similar to the concrete provided in Example 1, and the application proportions of raw material components and some test performance results are shown in the following table.

[0033] Concrete composition ratio and part performance test results (unit: kg) of table 1 embodiment 2-6

[0034] Example 2 Example 3 Example 4 Example 5 Example 6 Portland cement 260 200 200 190 150 fly ash 30 130 70 100 130 Granulated blast furnace ore 75 80 100 140 120 limestone powder 50 20 40 0 0 coal gangue 0 30 0 0 25 Zeolite powder 0 0 10 50 25 Quartz fine powder 0 0 10 10 0 Superplasticizer 5 5 4 6 5 Antidispersant 2.0 1.9 0.2 0.5 0.3 thickener 2 2 2 1 5 expansion agent 50 40 40 25 30 water consumption 160 150 165 140 130 Slump spread 600mm 580mm 700mm 620mm 540mm cement...

Embodiment 7-11

[0037] The grouting concrete for immersed pipe joints in this example is similar to the concrete provided in Example 1. The process of configuring the concrete is as follows: dry mix the sand and gravel powder evenly, then add one-third of water and admixtures for moderate mixing, and then Add the remaining amount of water and mix for 2 minutes to obtain homogeneous concrete. The application ratio of its raw material components and some test performance results are shown in the table below.

[0038] Concrete composition ratio and part performance test results of table 2 embodiment 7-11

[0039] Example 7 Example 8 Example 9 Example 10 Example 11 Portland cement 120 160 250 300 200 fly ash 160 120 130 20 100 Granulated blast furnace ore 40 50 130 150 100 limestone powder 0 0 100 0 0 coal gangue 10 100 0 30 60 Zeolite powder 0 0 0 10 0 Quartz fine powder 30 20 0 0 0 Superplasticizer 8 ...

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PUM

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Abstract

Immersed tube joint grouting concrete is disclosed. The concrete includes, by weight, 25-50% of a concrete admixture, 5-20% of inert powder, 1-2% of a water reducer, 0.2-0.5% of an anti-dispersion agent, 1-5% of a thickening agent, 5-8% of an expanding agent, other binding materials and water, wherein the total using amount of the binding materials is 450-500 kg/m<3>, and the water-binder ratio is 0.34-0.45. According to some properties of the concrete, the degree of slump extension is 600-700 mm, the concrete is non-dispersible under water, the cement loss amount is less than 3.0%, the content of suspended compounds is less than 150 mg/L, and the bleeding rate is 0. The concrete admixture is one or more of coal ash and pelletized blast furnace slag. The inert powder is one or more of limestone powder, gangue, zeolite powder and fine quartz powder. The concrete has a characteristic of resisting sea water brushing in a marine environment, can fully fill component pores, can avoid holes, and has outstanding performance in the field of preventing sea water erosion, and the like.

Description

technical field [0001] The invention belongs to the field of civil engineering construction, and relates to a marine engineering underwater pipe joint girder grouting material, in particular to a marine concrete mixture, which is suitable for grouting in narrow and closed spaces in seawater environments. The concrete has the characteristics of high flow, low dispersion, corrosion resistance, and micro-expansion, and has good feedback in construction and application in seawater environments. Background technique [0002] At present, the underwater joints of immersed tubes in China are mostly in fresh water environment, and the grouting materials are mostly mortar or ordinary concrete. In the marine environment, the grouting material has poor underwater cohesion, is prone to voids and pores, faces seawater corrosion, has insufficient protection for the structure, and cannot meet the requirements of grouting in narrow and closed spaces in the seawater environment. [0003] The...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B111/24C04B111/27C04B111/74C04B111/56
CPCC04B28/04C04B2111/00017C04B2111/00146C04B2111/00293C04B2111/00637C04B2111/24C04B2111/27C04B2111/56C04B2111/74C04B2201/50C04B2201/52C04B18/08C04B18/141C04B14/28C04B18/12C04B14/047C04B2103/0068C04B2103/0082C04B2103/44C04B2103/302C04B14/06C04B14/02C04B18/142C04B22/14
Inventor 周绍豪阳俊刘可心刘豪雨汪华文高凡
Owner CCCC WUHAN HARBOR ENG DESIGN & RES
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