Rapid repair material for rush repair and construction and construction method

Abstract

The invention relates to the technical field of cement-based composite materials, in particular to a rapid repair material for emergency repair and construction and a construction method, and aims to solve the problems that an existing inorganic repair material is long in coagulation and maintenance time and an organic repair material is insufficient in strength. An inorganic cementing material and an organic adhesive in the repairing material are respectively extruded into a gap to be repaired in different areas in an annular extrusion manner, and the organic adhesive is positioned outside the inorganic cementing material; the spherical injection head is arranged at the outlet of the inner injection cylinder of the extrusion device, the inorganic cementing material enters the organic adhesive in a spraying mode to form a fiber structure, the pinning effect can be improved through fibers, the problem of interface slippage of the cementing material and the organic adhesive is solved, and the overall bonding performance is improved.

Description

Technical Field

[0001] The invention relates to the technical field of cement-based composite materials, in particular to a rapid repair material for emergency repair and emergency construction and a construction method. Background Art

[0002] The main inorganic binders are ordinary Portland cement and lime powder or slaked lime powder. The pH value of this inorganic binder after adding water is 13 or 14, which is very alkaline. In addition, due to the bonding strength, brittleness, shrinkage and carbonization shrinkage of lime mortar, it is easy to cause cracking and bulging of the mortar layer after drying, and it is easy to cause the mesh cloth in the plaster mortar layer of the external insulation system to break, the plaster layer to fall off, and the surface paint to alkaline. When pasting granite, marble, etc., it is easy to cause the stone surface to fade and become damp.

[0003] In addition, the well-known problem of inorganic cementitious materials is that they require an absolute curing time, have a long setting time, and are prone to fall off in situations of secondary damage such as earthquakes, making them unsuitable for emergency repair and construction.

[0004] Many excellent organic adhesives have good adhesion properties, but they are expensive and lack strength. For example, foamed polyurethane materials are prone to uneven surfaces due to different degrees of foaming in different directions, and are not suitable for permanent repairs. Summary of the invention

[0005] The invention provides a rapid repair material and a construction method for emergency repair and construction, so as to alleviate the problems of long coagulation and curing time of existing inorganic repair materials and insufficient strength of organic repair materials.

[0006] In order to alleviate the above technical problems, the technical solution provided by the present invention is:

[0007] A rapid repair material for emergency repair and construction, comprising:

[0008] Inorganic gelling material and organic adhesive, the inorganic gelling material and the organic adhesive are respectively squeezed into the gap to be repaired in a circular extrusion manner, and the organic adhesive is located outside the inorganic gelling material;

[0009] The inorganic gelling material is composed of the following parts by weight:

[0010] 10-15 parts of ordinary Portland cement;

[0011] 9-10 parts of fly ash;

[0012] 1.2-3 parts of microsilica powder;

[0013] 8-10 parts water;

[0014] Sand 24-30 parts;

[0015] 20-30 parts of crushed stone;

[0016] 0.5-2 parts of early strength agent;

[0017] Polycarboxylic acid water reducer 0.1-0.3 parts.

[0018] Furthermore,

[0019] The organic adhesive is one or more of fast-curing resin materials, epoxy resins, polyurethanes and polyureas.

[0020] Furthermore,

[0021] The polyurethane is modified with a silane coupling agent.

[0022] Furthermore,

[0023] The silane coupling agent is at least one of 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane and γ-aminopropyltrimethoxysilane.

[0024] Furthermore,

[0025] The volume ratio of the organic binder to the inorganic gelling material is: (2-5):1.

[0026] A construction method of rapid repair materials for emergency repair and construction,

[0027] The injection construction is carried out by using a partitioned injection mechanism, wherein the partitioned injection mechanism has a ring-shaped injection head;

[0028] The inorganic gelling material and the organic adhesive are respectively squeezed into the gap to be repaired in different regions in a circular extrusion manner through the partitioned injection mechanism, and the organic adhesive is located outside the inorganic gelling material.

[0029] Furthermore,

[0030] The partitioned injection mechanism comprises: a middle injection cylinder and an outer injection cylinder arranged concentrically with the middle injection cylinder;

[0031] The middle injection cylinder is used for injecting inorganic gelling material;

[0032] The outer syringe is used for injecting the organic adhesive.

[0033] Furthermore,

[0034] The outlet edge of the outer injection cylinder is provided with an inwardly inclined guide plate.

[0035] Furthermore,

[0036] A spherical injection head is arranged at the lower part of the middle injection cylinder, and a small hole is opened on the spherical injection head.

[0037] Furthermore,

[0038] The steps include:

[0039] Injecting inorganic gelling material into the middle injection cylinder;

[0040] injecting an organic adhesive into the outer syringe;

[0041] First, the outer injection cylinder is driven and continued, then the inner injection cylinder is driven and continued, and finally the emergency repair device is moved laterally so that the guide plate of the outer injection cylinder scrapes the crack surface flat.

[0042] The beneficial effects of the rapid repair material and construction method for emergency repair and emergency construction provided by the present invention are analyzed as follows:

[0043] The repair material provided in this solution is a composite material of an organic adhesive and an inorganic gelling material. To achieve the corresponding function, it is necessary to ensure that the organic adhesive and the inorganic gelling material are in a ring shape with the inorganic gelling material in the center and the organic adhesive surrounds the inorganic gelling material. Therefore, when using the composite material, it is necessary to rely on a specific partition injection mechanism;

[0044] The partition injection mechanism comprises: a middle injection cylinder and an outer injection cylinder arranged concentrically with the middle injection cylinder; the middle injection cylinder is used for injecting inorganic gelling material; and the outer injection cylinder is used for injecting organic adhesive.

[0045] In order to ensure that the organic adhesive can wrap the inorganic gelling material, in the grouting process, it is first ensured that the organic adhesive is extruded before the inorganic gelling material. Under the action of the guide plate at the outlet position of the outer injection cylinder of the extrusion device, the organic adhesive flows toward the inorganic gelling material until it wraps the inorganic gelling material.

[0046] The purpose of wrapping inorganic cementitious materials with organic adhesives is: first, to ensure that the organic adhesive has good adhesion with the wall surface of the crack to be repaired. The inorganic cementitious materials are wrapped by the organic adhesive and can slowly hydrate inside without affecting the initial bonding properties of the overall composite material. As the degree of hydration of the inorganic cementitious materials increases, the continuous strength of the repair material continues to increase.

[0047] In order to increase the bonding tightness between the inorganic gelling material and the organic adhesive, a spherical injection head is set at the outlet of the inner injection barrel of the extrusion device. The inorganic gelling material enters the interior of the organic adhesive in the form of a spray to form a fiber structure. The fiber will increase the pinning effect and avoid the interface slip problem between the gelling material and the organic adhesive, thereby improving the overall bonding performance.

[0048] In order to improve the durability of the polyurethane adhesive, the polyurethane surface is modified. The modified polyurethane adhesive is formed by modifying the polyurethane with a silane coupling agent. The silane coupling agent is at least one of 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, and γ-aminopropyltrimethoxysilane. Polyurethane itself has good alkali resistance. The modified polyurethane adhesive can further improve its alkali resistance to improve its compatibility with inorganic gelling materials.

[0049] Experiments have confirmed that when the volume ratio of organic adhesive to inorganic gelling material is 3:1, the organic adhesive and inorganic gelling material achieve greater tensile strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0051] Figure 1 A schematic diagram of the overall structure of a partitioned injection mechanism provided in an embodiment of the present invention.

[0052] Icon: 100 - partition injection mechanism; 110 - middle injection cylinder; 111 - injection head; 120 - outer injection cylinder; 121 - guide plate. DETAILED DESCRIPTION

[0053] Test method: The test was carried out using the method specified in national standard GB17671.

[0054] Example 1

[0055] The proportion of the gelling material by weight is as follows:

[0056] 12 parts of ordinary Portland cement;

[0057] 9 parts of fly ash;

[0058] 2 parts of microsilica powder;

[0059] 9 parts water;

[0060] 28 parts of sand;

[0061] 25 parts of crushed stone;

[0062] 1.5 parts of early strength agent;

[0063] 0.2 parts of polycarboxylic acid water reducer.

[0064] The organic adhesive is a modified polyurethane adhesive, and the modified polyurethane adhesive is formed by modifying 3-aminopropyltrimethoxysilane;

[0065] The volume ratio of organic adhesive to inorganic gelling material is 3:1.

[0066] Use partition injection mechanism B (such as Figure 1 As shown in the figure, grouting is performed, and the partition injection mechanism B includes a middle injection cylinder and an outer injection cylinder arranged concentrically with the middle injection cylinder, and the middle injection cylinder has a spherical injection head;

[0067] The organic adhesive is filled into the outer injection cylinder, and the inorganic gelling material is filled into the middle injection cylinder; the outer injection cylinder is driven for 3 seconds and then the middle injection cylinder is driven. Finally, the emergency repair device is moved horizontally so that the guide plate of the outer injection cylinder scrapes the crack surface flat.

[0068] The experimental results show that the tensile strength is 20.1 MPa.

[0069] Comparative Example 1

[0070] The formula of the gelling material and the organic binder is the same as that of Example 1;

[0071] The volume ratio of organic adhesive to inorganic gelling material is 3:1.

[0072] The mold A is used for grouting, and the mold A includes a middle injection cylinder and an outer injection cylinder arranged concentrically with the middle injection cylinder, but the middle injection cylinder does not have a spherical injection head;

[0073] The organic adhesive is filled into the outer injection cylinder, and the inorganic gelling material is filled into the middle injection cylinder; the outer injection cylinder is driven for 3 seconds and then the middle injection cylinder is driven. Finally, the emergency repair device is moved horizontally so that the guide plate of the outer injection cylinder scrapes the crack surface flat.

[0074] The experimental results show that the tensile strength is 15.9 MPa.

[0075] Comparative Example 2

[0076] The formula of the inorganic gelling material and the organic adhesive is the same as that of Example 1;

[0077] The volume ratio of organic adhesive to inorganic gelling material is 1:1.

[0078] The partitioned injection mechanism B is used for grouting, and the partitioned injection mechanism B includes a middle injection cylinder and an outer injection cylinder arranged concentrically with the middle injection cylinder, and the middle injection cylinder has a spherical injection head;

[0079] The organic adhesive is filled into the outer injection cylinder, and the inorganic gelling material is filled into the middle injection cylinder; the outer injection cylinder is driven for 3 seconds and then the middle injection cylinder is driven. Finally, the emergency repair device is moved horizontally so that the guide plate of the outer injection cylinder scrapes the crack surface flat.

[0080] The experimental results show that the tensile strength is 12.2MPa.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rapid repair material for emergency repair and construction, characterized in that: include: Inorganic gelling material and organic adhesive, the inorganic gelling material and the organic adhesive are respectively squeezed into the gap to be repaired in a circular extrusion manner, and the organic adhesive is located outside the inorganic gelling material; The inorganic gelling material is composed of the following parts by weight: 10-15 parts of ordinary Portland cement; 9-10 parts of fly ash; 1.2-3 parts of microsilica powder; 8-10 parts water; Sand 24-30 parts; 20-30 parts of crushed stone; 0.5-2 parts of early strength agent; Polycarboxylic acid water reducer 0.1-0.3 parts.

2. The rapid repair material for emergency repair and construction according to claim 1 is characterized in that: include: The organic adhesive is one or more of fast-curing resin materials, epoxy resins, polyurethanes and polyureas.

3. The rapid repair material for emergency repair and construction according to claim 2 is characterized in that: include: The polyurethane is modified with a silane coupling agent.

4. The rapid repair material for emergency repair and construction according to claim 3 is characterized in that: include: The silane coupling agent is at least one of 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane and γ-aminopropyltrimethoxysilane.

5. The rapid repair material for emergency repair and construction according to claim 1, characterized in that: include: The volume ratio of the organic binder to the inorganic gelling material is: (2-5):

1.

6. A construction method using the rapid repair material for emergency repair and construction as described in any one of claims 1 to 5, characterized in that : The injection construction is carried out by using a partitioned injection mechanism, wherein the partitioned injection mechanism has a ring-shaped injection head; The inorganic gelling material and the organic adhesive are respectively squeezed into the gap to be repaired in different regions in a circular extrusion manner through the partitioned injection mechanism, and the organic adhesive is located outside the inorganic gelling material.

7. The emergency rescue channel repair construction method according to claim 6 is characterized in that : The partitioned injection mechanism comprises: a middle injection cylinder and an outer injection cylinder arranged concentrically with the middle injection cylinder; The middle injection cylinder is used for injecting inorganic gelling material; The outer injection cylinder is used for injecting the organic adhesive.

8. The emergency rescue channel repair construction method according to claim 7 is characterized in that : The outlet edge of the outer injection cylinder is provided with an inwardly inclined guide plate.

9. The emergency rescue channel repair construction method according to claim 8, characterized in that : A spherical injection head is arranged at the lower part of the middle injection cylinder, and a small hole is opened on the spherical injection head.

10. The emergency rescue channel repair construction method according to claim 9, characterized in that: The steps include: Injecting inorganic gelling material into the middle injection cylinder; injecting an organic adhesive into the outer syringe; First, the outer injection cylinder is driven and continued, then the inner injection cylinder is driven and continued, and finally the emergency repair device is moved laterally so that the guide plate of the outer injection cylinder scrapes the crack surface flat.

Images