1. A leakage repairing material for an underwater leakage channel of a deepwater building is characterized by comprising a composition A and a composition B in a mass ratio of 3-5: 1;

the component A consists of water, cement, a retarder, a water reducing agent, a flocculating agent, sand and stones;

the component B is composed of water, quartz sand, fly ash, aluminum sulfate and lithium carbonate.

2. The leakage repairing material for the underwater leakage passage of the deep water building as claimed in claim 1, wherein the retarder in the component A is borax, the water reducing agent is a polycarboxylic acid water reducing agent, and the flocculating agent is polyacrylamide.

3. The leak repairing material for the underwater leakage passage of the deep water building as claimed in claim 2, wherein the cement in the component a is one of sulphoaluminate cement or portland cement.

4. The leak repairing material for the underwater leakage passage of the deep water building as claimed in claim 3, wherein the sand in the component A is river sand or artificial sand, and the particle size is 0-5 mm.

5. The leak repairing material for underwater leakage paths of deep water buildings as claimed in claim 4, wherein the particle size of said stones in the A component is larger than 5mm, and the maximum particle size of the stones is not more than 1/3 of the minimum diameter of the leakage paths.

6. The leakage repairing material for the underwater leakage passage of the deep water building as claimed in claim 5, wherein the component A comprises the following components in parts by weight:

4-8 parts of water, namely,

10-20 parts of cement, namely,

0.2 to 0.7 portion of retarder,

0.8 to 1.1 portions of water reducing agent,

0.2 to 0.7 portion of flocculating agent,

20-30 parts of sand, namely,

30-50 parts of stones.

7. The leak repairing material for the underwater leakage passage of the deep water building as claimed in claim 1, wherein the particle size of the quartz sand in the component B is 47-75 μm, the fly ash is class I fly ash, and the water demand ratio of the fly ash is less than 95%.

8. The leakage repairing material for the underwater leakage passage of the deep water building as claimed in claim 7, wherein the component B comprises the following components in parts by weight:

3-6 parts of water, namely,

10-20 parts of quartz sand,

10-20 parts of fly ash,

0.2 to 0.8 portion of aluminum sulfate,

0.1-0.2 part of lithium carbonate.

9. The use method of the leakage repairing material for the underwater leakage passage of the deep water building as claimed in any one of claims 1 to 8, comprising the steps of:

firstly, preparing a component A and a component B; then mixing and stirring the component A and the component B according to a proportion, and conveying the mixture to a leakage position for solidification.

10. The use of claim 9, wherein the stirring time is 60-180 s.

Background

Hydraulic buildings are an important infrastructure for the people concerned. The number and scale of hydraulic buildings in China are ahead of the world level, and built three gorges dam, white crane beach hydropower stations and south-to-north water transfer projects under construction become the largest large-scale water delivery buildings and water transfer projects in the world. However, natural disasters in China frequently occur, landslides and burst caused by flood disasters and long-time use lead to damage to underwater parts of deep water buildings and even leakage. The leakage of the underwater concrete structure is mainly divided into point leakage, line leakage and streaming leakage: the point leakage is divided into one point or multiple points, most of the point leakage is multi-point leakage, the leakage points are dispersed, and the range is large; the bypass leakage is a part where a water delivery building and an adjacent building are in contact, and leakage occurs at the contact part due to long-term scouring and erosion, so that a leakage channel is formed along the edge of the water delivery building; the line leakage can be divided into damage crack leakage, contact joint leakage and expansion joint leakage, the crack leakage is mostly caused by penetrating cracks in the concrete structure, and the contact joint leakage and the expansion joint leakage are mainly caused by the failure of a water stop structure adopted in the construction process of the water delivery building.

The conventional plugging method comprises a direct plugging method, a lower pipe plugging method, a wood wedge plugging method and a grouting plugging method, different plugging methods are adopted aiming at different construction environments and conditions, and the direct plugging method mainly aims at a leakage point with water pressure less than 1 meter; the lower pipe leakage plugging method mainly aims at leakage channels corresponding to a water head of 1-4 meters; the wooden wedge leaking stoppage method mainly aims at a leaking channel with the depth larger than 4 meters; the grouting method can be used for plugging holes with large water pressure, large holes and large water leakage. The leakage channel of the underwater concrete structure of the deep water building is usually positioned at a deeper position underwater, particularly under the low-temperature and high-pressure water environment conditions aiming at the leakage channel at the 300m water depth position, the adopted grouting material needs to meet the characteristics of rapid condensation under the low-temperature condition, rapid strength development and micro-expansion.

Therefore, the development of the leakage repairing material for the underwater leakage channel of the deep water building, which has the advantages of early strength, high strength and micro-expansion under the low-temperature condition, has very important significance.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a leakage repairing material for an underwater leakage channel of a deep water building, which is composed of an optimized cement concrete A component and a capsule material B component, has the excellent characteristics of high strength, high fluidity and micro expansion under the low-temperature condition, and can solve the problems of uncontrollable setting time and low strength of the existing leakage repairing material under the low-temperature condition.

The leakage repairing material for the underwater leakage channel of the deepwater building consists of a composition A and a composition B according to the mass ratio of 3-5: 1;

the component A consists of water, cement, a retarder, a water reducing agent, a flocculating agent, sand and stones;

the component B is composed of water, quartz sand, fly ash, aluminum sulfate and lithium carbonate.

Preferably, in the component A of the leakage repairing material, the retarder is borax, the water reducing agent is a polycarboxylic acid water reducing agent, and the flocculating agent is polyacrylamide.

Preferably, the cement in the component A of the leakage repairing material is one of sulphoaluminate cement or portland cement.

Preferably, the sand in the component A of the leakage repairing material is river sand or artificial sand, and the particle size is 0-5 mm.

Further preferably, the stone particle size in the A component of the leakage-repairing material of the present invention is larger than 5mm, and the maximum particle size of the stone is not more than 1/3 of the minimum diameter of the leakage channel.

In some embodiments, the parts by weight of each component in the a component of the present invention are as follows:

4-8 parts of water, namely,

10-20 parts of cement, namely,

0.2 to 0.7 portion of retarder,

0.8 to 1.1 portions of water reducing agent,

0.2 to 0.7 portion of flocculating agent,

20-30 parts of sand, namely,

30-50 parts of stones.

Preferably, in the component B of the leakage repairing material, the particle size of the quartz sand is 47-75 mm, the fly ash is I-grade fly ash, and the water requirement ratio of the fly ash is less than 95%.

In some embodiments, the weight parts of each component in the B component of the present invention are as follows:

3-6 parts of water, namely,

10-20 parts of quartz sand,

10-20 parts of fly ash,

0.2 to 0.8 portion of aluminum sulfate,

0.1-0.2 part of lithium carbonate.

The invention also provides a using method of the leakage repairing material for the underwater leakage channel of the deepwater building, namely firstly preparing the component A and the component B; then the component A and the component B are stirred and mixed according to a proportion and then are conveyed to a leakage position for solidification. Specifically, the component A and the component B are respectively grouped for pipeline transportation, and then double pipelines are changed into single pipelines to be mixed and then transported to a leakage position for solidification.

Preferably, the stirring and mixing time is 60-180 s.

Compared with the prior art, the invention has the following beneficial effects:

1. the leakage repairing material is formed by utilizing an optimized cement concrete component A and a cementing material component B, wherein a retarder is added into the traditional cement concrete, so that the setting time of the cement is prolonged, the fluidity of the cement concrete is kept, and the long-distance conveying of the cement concrete is facilitated;

2. the cementing material B component in the leakage repairing material can be combined with the optimized cement concrete A component, so that the coagulation efficiency of the A component is improved. The fly ash and the quartz sand in the component B are carriers of an aluminum sulfate coagulant, when the component A and the component B are mixed, the carrier components do not influence the strength of cement concrete, and simultaneously the coagulant in the component B can be fully contacted with the cement concrete, so that the aim of quick coagulation is fulfilled;

3. according to the invention, a certain amount of flocculating agent is added into the leakage repairing material, so that the leakage repairing material can keep a high flocculation state underwater, and the leakage repairing compactness, the anti-permeability performance and the mechanical property are improved;

4. the particle size of the stones adopted in the leakage repairing material is selected according to the diameter of the leakage channel, on one hand, the stones with larger particle sizes are selected, so that the diameter of the leakage channel can be more quickly reduced, the stones reach the edge of a gap and are prevented from being washed away, on the other hand, the stones with proper grading are selected, the stones can be better combined with the component B of the cementing material and sand, so that the diameter of the leakage channel is reduced until the purpose of plugging the leakage channel is achieved;

5. the leakage repairing material for the underwater leakage channel of the deepwater building can be better combined with the leakage channel, has good fluidity, strong cohesiveness, controllable operation and convenient construction, can greatly reduce the material cost and the workload, and meets the requirements of resource saving and environmental protection.

Detailed Description

The present invention will be further described with reference to the following specific examples.

Example 1

A leakage repairing material for an underwater leakage channel of a deepwater building comprises a component A and a component B, wherein the component A comprises the following raw materials:

water: 7.5kg, cement: 16kg, retarder borax: 0.8kg, flocculant polyacrylamide: 0.2kg, sand: 29kg, pebble: 48kg, polycarboxylic acid water reducing agent: 0.8kg, wherein the cement is PII 42.5 grade sulphoaluminate cement, and the particle size of the stones is 5-10 mm;

the component B comprises the following raw materials:

water: 5kg, quartz sand: 10kg, fly ash: 10kg, aluminum sulfate: 0.4kg, lithium carbonate: 0.2kg, wherein the particle size of the quartz sand is 47-75 μm; the fly ash is I-grade fly ash, and the water demand ratio of the fly ash is less than 95%.

Example 2

A leakage repairing material for an underwater leakage channel of a deepwater building comprises a component A and a component B, wherein the component A comprises the following raw materials:

water: 8kg, cement: 17kg, retarder borax: 0.9kg, flocculant polyacrylamide: 0.2kg, sand: 28.5kg, pebble: 46kg, polycarboxylic acid water reducing agent: 0.9 kg. Wherein the cement is PII 42.5-grade sulphoaluminate cement, and the particle size of the stones is 5-15 mm;

the component B comprises the following raw materials:

water: 4kg, quartz sand: 10kg, fly ash: 10kg, aluminum sulfate: 0.3kg, lithium carbonate: 0.15kg, wherein the particle size of the quartz sand is 47-75 μm; the fly ash is I-grade fly ash, and the water demand ratio of the fly ash is less than 95%.

Example 3

A leakage repairing material for an underwater leakage channel of a deepwater building comprises a component A and a component B, wherein the component A comprises the following raw materials:

water: 8kg, 13.5kg of cement, 0.7kg of retarder borax, a flocculating agent polyacrylamide: 0.2kg, sand: 30kg, pebble: 49kg, polycarboxylic acid water reducing agent: 0.6kg, wherein the cement is PII 42.5-grade sulphoaluminate cement, and the particle size of stones is 10-25 mm;

the component B comprises the following raw materials:

4kg of water, 10kg of quartz sand, 10kg of fly ash, 0.2kg of aluminum sulfate and 0.1kg of lithium carbonate, wherein the particle size of the quartz sand is 47-75 mu m, the fly ash is class I fly ash, and the water demand ratio of the fly ash is less than 95%.

The component A in the leak repairing materials in the embodiments 1-3 is detected, the leak repairing materials in the embodiments 1 and 2 are respectively used for carrying out leak repairing treatment on underwater leakage channels of deep water buildings, the specific using method is that the component A and the component B are respectively conveyed through pipelines, double pipelines are changed into a single pipeline to be mixed for 100s and then conveyed to a leakage position to be solidified, and the compression strength and the expansion rate of the solidified leak repairing materials are detected as shown in the following table 1.

TABLE 1

As can be seen from the table, the initial setting time of the component A in the leakage repairing material is about 5 hours, the final setting time is more than 6 hours, enough time is provided for long-distance conveying, after A, B components reach a leakage passage and are mixed, the initial setting time reaches about 45 minutes, the final setting time reaches about 55 minutes, after A, B components are mixed, the strength reaches 20MPa, the compressive strength at 1d reaches more than 26MPa, the compressive strength at 7d reaches more than 30MPa, and the compressive strength at 28d reaches more than 34 MPa.

The above embodiments are merely examples of the present invention, and it is obvious that the present invention is not limited to the above embodiments, but may be modified. All modifications directly or indirectly derivable by a person skilled in the art from the present disclosure are to be considered within the scope of the present invention.