阅读说明：本技术 一种针对集中渗漏水缺陷的灌浆材料及其灌浆方法 (Grouting material for centralized water leakage defect and grouting method thereof ) 是由 梁国涛 孔令涛 朱卫东 孙颖章 陈萌 于 2020-04-22 设计创作，主要内容包括：本发明公开了一种针对集中渗漏水缺陷的灌浆材料及灌浆方法,主要应用于水工建筑物水下混凝土集中漏水缺陷处理,其灌浆材料按照重量份数由60份环氧树脂、10-15份活性稀释剂、25-30份固化混合物、1份非活性添加剂混合后搅拌制得,活性稀释剂由以下重量百分比的原材料混合而成：10%-14%的环氧氯丙烷、45%-55%的脂肪醇、6%-10%的多聚醚脂、25%-35%的三氯丙烷,固化混合物由以下重量百分比的原材料混合而成：95% MS-1085C环氧固化剂、5%硅烷偶联剂KH560,非活性添加剂为CaO；本发明的灌浆材料在有水环境下与原混凝土基面粘接性能较好,能够对混凝土渗漏水通道和细微渗水裂缝起到很好的止水和补强加固作用,灌浆方法便捷实用,能够有效处理流量<300m3/h,压力<0.4MPa的混凝土结构集中渗漏水缺陷。(The invention discloses a grouting material and a grouting method aiming at concentrated water leakage defects, which are mainly applied to the concentrated water leakage defect treatment of underwater concrete of hydraulic buildings, wherein the grouting material is prepared by mixing and stirring 60 parts of epoxy resin, 10-15 parts of reactive diluent, 25-30 parts of curing mixture and 1 part of inactive additive according to parts by weight, and the reactive diluent is prepared by mixing the following raw materials in percentage by weight: 10-14% of epoxy chloropropane, 45-55% of fatty alcohol, 6-10% of polyether ester and 25-35% of trichloropropane, wherein the cured mixture is prepared by mixing the following raw materials in percentage by weight: 95 percent of MS-1085C epoxy curing agent, 5 percent of silane coupling agent KH560 and inactive additive CaO; the grouting material has good bonding performance with the original concrete base surface in an aqueous environment, can play a good role in water stopping, reinforcing and reinforcing for concrete leakage water channels and fine water seepage cracks, is convenient and practical in grouting method, and can effectively treat the concentrated leakage water defect of the concrete structure with the flow rate of less than 300m3/h and the pressure of less than 0.4 MPa.)

1. The grouting material for the concentrated water leakage defect is characterized by being prepared by mixing and stirring 60 parts of epoxy resin, 10-15 parts of reactive diluent, 25-30 parts of cured mixture and 1 part of inactive additive in parts by weight;

the active diluent is prepared by mixing the following raw materials in percentage by weight: 10-14% of epoxy chloropropane, 45-55% of fatty alcohol, 6-10% of polyether ester and 25-35% of trichloropropane;

the curing mixture is prepared by mixing the following raw materials in percentage by weight: 95 percent of MS-1085C epoxy curing agent and 5 percent of silane coupling agent KH 560;

the inactive additive is CaO.

2. The grouting material for concentrated water leakage defects according to claim 1, wherein the epoxy resin is bisphenol a type epoxy resin E51.

3. The grouting material for concentrated water leakage defect according to claim 1, wherein the CaO has a particle size of more than 400 mesh.

4. The method for grouting of a grouting material for concentrated water leakage defects according to any one of claims 1 to 3, comprising the steps of:

s1, reaming the water outlet of the centralized water leakage channel to form a standard funnel shape, and reasonably adjusting the reaming depth and size according to construction experience by combining actual conditions;

s2, installing a grouting device, wherein the grouting device comprises a flow guide pipe and a pressure plate welded on the flow guide pipe, a chemical grouting plug and a control valve are arranged on the flow guide pipe, the control valve of the grouting device is opened, the pressure plate of the grouting device is fixed on the surface of a building by using an expansion bolt, a sealing rubber pad is arranged on one surface of the pressure plate, which is in contact with the building, and the flow guide pipe extends into a water outlet of the centralized water leakage channel;

s3, plugging the periphery of the pressing plate by using quick-setting cement mortar to ensure good sealing performance of the grouting device;

s4, after the quick setting cement mortar is completely solidified, closing the control valve to convert the water condition into the still water condition;

s5, connecting a chemical grouting pump on the chemical grouting plug, performing reverse grouting by using a grouting material, and reasonably adjusting grouting pressure and grouting speed according to construction experience by combining actual conditions;

and S6, after finishing grouting for 48 hours, completely curing the grouting liquid, cutting and dismantling the simple grouting device by using a cutting machine, and repairing the surface of the water outlet by using a repairing material after the cutting and dismantling are finished.

Technical Field

The invention relates to the technical field of grouting materials, which are mainly applied to the treatment of the centralized water leakage defect of underwater concrete of hydraulic buildings, in particular to a grouting material aiming at the centralized water leakage defect and a grouting method thereof.

Background

The water leakage defects of the concrete structure are common defects in hydraulic buildings and are divided into crack water leakage and concentrated water leakage, and once the water leakage defects occur, the water leakage defects need to be treated in time, otherwise serious potential safety hazards can be caused to the hydraulic buildings.

The commonly used water-stop grouting materials in China at present mainly comprise polyurethane grouting materials, cement grouting materials and epoxy resin grouting materials; the polyurethane grouting material can rapidly generate chemical reaction with water to generate an elastic structure cross-linking compound with 2-10 times volume, and plays a role in blocking a water leakage channel, but has the following defects: 1. the generated elastic structure cross-linking compound has low strength and cannot play a role in reinforcing and reinforcing a concrete structure; 2. the polyurethane grouting liquid has a large volume expansion coefficient after a chemical reaction with water, and can further cause expansion fracture damage to concrete seepage cracks and holes; 3. for flow>20m³H, pressure>The centralized water leakage defect of 0.1MPa can not effectively finish plugging; the cement grouting material mainly comprises cement mortar and fine aggregate concrete grouting material, mainly aims at the grouting treatment of the concentrated leakage water defect with larger flow and pressure, but also has the defects of water leakage and water leakageThe following disadvantages are: 1. the cement grouting material belongs to granular materials, has poor permeability and can not invade into fine cracks; 2. the cement grouting material has poor bonding performance with the original base surface; 3. when grouting is carried out in water environment, the strength performance of the grouting material cannot be ensured. The epoxy resin grouting material has strong permeability, good bonding performance, high strength after curing and stable performance, and is widely applied to reinforcement and reinforcement treatment of structural defects.

Aiming at the defects of centralized water leakage with large leakage water flow and pressure, the grouting modes of inlet plugging and middle plugging are not practical in hydraulic buildings, and reverse grouting plugging treatment can only be carried out at a water outlet.

Disclosure of Invention

In order to overcome the defects, the invention aims to provide a grouting material aiming at the defect of concentrated water leakage and a grouting method thereof<300m³H, pressure<The concrete structure of 0.4MPa concentrates the water leakage defect.

In order to achieve the purpose, the invention is implemented according to the following technical scheme:

a grouting material for concentrated water leakage defects is prepared by mixing and stirring 60 parts of epoxy resin, 10-15 parts of reactive diluent, 25-30 parts of cured mixture and 1 part of inactive additive according to parts by weight;

the active diluent is prepared by mixing the following raw materials in percentage by weight: 10-14% of epoxy chloropropane, 45-55% of fatty alcohol, 6-10% of polyether ester and 25-35% of trichloropropane;

the curing mixture is prepared by mixing the following raw materials in percentage by weight: 95 percent of MS-1085C epoxy curing agent and 5 percent of silane coupling agent KH 560; MS-1085C epoxy curing agent produced by Changsha Puzhang Biotechnology Limited is selected, the MS-1085C epoxy curing agent is hydrophobic curing agent, and can form a stable interface with water after being mixed with hydrophobic epoxy resin, the curing reaction is not influenced by water, and the grouting liquid can effectively drive away the water on a base surface under the action of grouting pressure, so that good bonding performance is ensured;

the inactive additive is CaO; CaO can chemically react with water and quickly release heat, so that on one hand, a small amount of water existing in a base surface and grouting liquid can be absorbed, on the other hand, the heating can accelerate the curing reaction of epoxy resin and reduce the viscosity of the grouting liquid;

preferably, the epoxy resin is bisphenol a epoxy resin E51;

preferably, the grain size of the CaO is larger than 400 meshes;

a grouting method of a grouting material aiming at concentrated water leakage defects comprises the following steps:

s1, reaming the water outlet of the centralized water leakage channel to form a standard funnel shape, and reasonably adjusting the reaming depth and size according to construction experience by combining actual conditions;

s2, installing a grouting device, wherein the grouting device comprises a flow guide pipe and a pressure plate welded on the flow guide pipe, a chemical grouting plug and a control valve are arranged on the flow guide pipe, the control valve of the grouting device is opened, the pressure plate of the grouting device is fixed on the surface of a building by using an expansion bolt, a sealing rubber pad is arranged on one surface of the pressure plate, which is in contact with the building, the flow guide pipe extends into a water outlet of the centralized water leakage channel, and the diameters of the flow guide pipe and the control valve are determined according to the size of water leakage;

s3, plugging the periphery of the pressing plate by using quick-setting cement mortar to ensure good sealing performance of the grouting device;

s4, after the quick setting cement mortar is completely solidified, closing the control valve to convert the water condition into the still water condition;

s5, connecting a chemical grouting pump on the chemical grouting plug, performing reverse grouting by using a grouting material, and reasonably adjusting grouting pressure and grouting speed according to construction experience by combining actual conditions;

and S6, after finishing grouting for 48 hours, completely curing the grouting liquid, cutting and dismantling the simple grouting device by using a cutting machine, and repairing the surface of the water outlet by using a repairing material after the cutting and dismantling are finished.

Compared with the prior art, the grouting material and the grouting method thereof aiming at the defect of concentrated water leakage have the following advantages:

1. the reactive diluent can promote the epoxy resin curing reaction, reduce the viscosity of the grouting liquid and facilitate the grouting liquid to better permeate into water seepage cracks of a concrete structure.

2. The MS-1085C epoxy curing agent produced by Changsha Puzhao biochemical technology limited company is a hydrophobic curing agent, can form a stable interface with water after being mixed with hydrophobic epoxy resin, the curing reaction of the curing agent is not influenced by water, and the grouting liquid can effectively drive away the water on a base surface under the action of grouting pressure, so that good bonding performance is ensured.

3. The silane coupling agent KH560 is a surface treatment agent, can reduce the surface tension of the grouting liquid and enhance the water-driving effect of the grouting liquid, and the coupling agent can respectively form chemical bonds on the surfaces of epoxy resin and inorganic matters through hydrolysis, so that the bonding strength between the grouting liquid and a base surface is improved.

4. The inactive additive CaO can chemically react with water and quickly release heat, can absorb little water existing in a base surface and grouting liquid, and can accelerate the curing reaction of epoxy resin and reduce the viscosity of the grouting liquid.

5. The grouting device used by the grouting method comprises a flow guide pipe, a control valve, a chemical grouting plug, a pressing plate, a sealing rubber pad and the like, has the functions of flow guide, water stop and grouting, is simple in device and convenient to operate, has obvious effect in centralized water leakage defect treatment, and can quickly and effectively treat the centralized water leakage defect with large water leakage amount and pressure.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of the grouting method of the present invention;

fig. 2 is a view of a grouting apparatus used in the grouting method of the present invention.

Detailed Description

The invention will be further described with reference to the drawings and specific embodiments, which are illustrative of the invention and are not to be construed as limiting the invention.