A grouting material and a method for producing the same

Abstract

The application belongs to the technical field of materials, and provides a grouting material which comprises Portland cement, warm rubber, isocyanate, epoxy resin, polyethylene glycol, aluminum oxide, glycerol, a curing agent, a coupling agent and water. The grouting material combines organic materials and inorganic materials, and has improved strength and adhesion, and can bond the stone filled in the goaf together, tightly combine the aggregate, and will not slide, disperse or have other phenomena. The application further provides a preparation method of the grouting material, and the preparation method adopts stirring, and through step-by-step stirring, the required heating temperature is reduced, the process requirement is reduced, and the preparation is suitable for large-scale preparation.

Description

Technical Field

[0001] The present invention relates to the technical field of materials, and in particular to a grouting material and a preparation method thereof. Background Art

[0002] As mining progresses deeper, more and more goafs are formed. These are "cavities" beneath the surface, created by human excavation or natural geological movements, and are prone to collapse accidents. Furthermore, due to the impact of goafs, many buildings cannot be constructed, causing inconvenience to people's lives and production. The large number of stopes, chambers, and tunnels left behind by underground mining, which are not promptly addressed, deteriorates mining conditions, leading to pillar deformation, difficulty maintaining adjacent stopes and tunnels, large-scale underground caving, rock movement, and surface subsidence. More seriously, the high-speed airflow and shock waves from the sudden collapse of goafs can cause casualties and damage equipment. These pose a serious threat to mine safety, environmental degradation, and significant waste of mineral resources. They also pose serious risks to open-pit mining and pose a serious threat to mine workers and equipment. Landfilling is often used to address goafs, but using sand is costly and prohibitive, while using rocks can cause rolling and fail to effectively stabilize the rocks. Therefore, a suitable landfill material is urgently needed. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects in the prior art and provide a grouting material and a preparation method thereof.

[0004] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0005] The present invention provides a grouting material, which is prepared from the following raw materials in parts by mass: 80-120 parts of Portland cement, 40-60 parts of warm wheel glue, 30-40 parts of isocyanate, 10-20 parts of epoxy resin, 20-25 parts of polyethylene glycol, 15-25 parts of aluminum oxide, 5-10 parts of glycerol, 10-15 parts of curing agent, 5-10 parts of coupling agent, and 100-120 parts of water.

[0006] Preferably, the isocyanate is toluene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate or dicyclohexylmethane diisocyanate.

[0007] Preferably, the epoxy resin is bisphenol A epoxy resin, bisphenol F epoxy resin or polyphenol glycidyl ether epoxy resin.

[0008] Preferably, the curing agent is diethylenetriamine, triethylenetetramine or tetraethylenepentamine.

[0009] Preferably, the coupling agent is KH-550, KH-560, KH-580 or A-186.

[0010] The present invention also provides a method for preparing the grouting material, comprising the following steps:

[0011] (1) mixing isocyanate, epoxy resin, polyethylene glycol, glycerin, coupling agent and the first portion of water to obtain an intermediate material;

[0012] (2) The intermediate material and the remaining raw materials are mixed to obtain the grouting material.

[0013] Preferably, the mass ratio of the first portion of water to water in step (1) is 1:2-3.

[0014] Preferably, the mixing method in step (1) is stirring, and the stirring speed is 60 to 100 rpm;

[0015] The mixing is a first step mixing and a second step mixing performed sequentially;

[0016] The temperature of the first step mixing is 40-50° C., and the time of the first step mixing is 1-2 hours.

[0017] Preferably, the temperature of the second step mixing is 60-70° C., and the time of the second step mixing is 1-2 hours.

[0018] Preferably, the mixing method in step (2) is stirring, the stirring speed is 120-150 rpm, and the stirring time is 2-3 hours.

[0019] The present invention provides a grouting material comprising silicate cement, Wenlun glue, isocyanate, epoxy resin, polyethylene glycol, alumina, glycerin, a curing agent, a coupling agent and water. The grouting material provided by the present invention combines organic materials and inorganic materials. The obtained grouting material not only has improved strength, but also has improved bonding ability. It can bond the stones filled in the goaf together and tightly combine the aggregates without slipping, dispersion and the like. The present invention also provides a method for preparing the grouting material. By adopting a stirring method and step-by-step stirring, the required heating temperature is reduced, the process requirements are reduced, and it is suitable for large-scale preparation. DETAILED DESCRIPTION

[0020] The present invention provides a grouting material, which is prepared from the following raw materials in parts by mass: 80-120 parts of Portland cement, 40-60 parts of warm wheel glue, 30-40 parts of isocyanate, 10-20 parts of epoxy resin, 20-25 parts of polyethylene glycol, 15-25 parts of aluminum oxide, 5-10 parts of glycerol, 10-15 parts of curing agent, 5-10 parts of coupling agent, and 100-120 parts of water.

[0021] In the present invention, the amount of Portland cement is 80 to 120 parts, preferably 90 to 110 parts, and more preferably 95 to 105 parts.

[0022] In the present invention, the warm wheel rubber is 40 to 60 parts, preferably 45 to 55 parts, and more preferably 48 to 52 parts.

[0023] In the present invention, the mixed use of silicate cement and warm wheel glue can increase the consistency and rheological properties of mineral sand and improve the stability of self-compacting concrete.

[0024] In the present invention, the isocyanate is in an amount of 30 to 40 parts, preferably 32 to 38 parts, and more preferably 34 to 36 parts.

[0025] In the present invention, the isocyanate is preferably toluene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate or dicyclohexylmethane diisocyanate.

[0026] In the present invention, the epoxy resin is 10 to 20 parts, preferably 12 to 18 parts, and more preferably 14 to 16 parts.

[0027] In the present invention, the epoxy resin is preferably a bisphenol A epoxy resin, a bisphenol F epoxy resin or a polyphenol glycidyl ether epoxy resin.

[0028] In the present invention, the polyethylene glycol is 20 to 25 parts, preferably 21 to 24 parts, and more preferably 22 to 23 parts.

[0029] In the present invention, the aluminum oxide is 15 to 25 parts, preferably 16 to 24 parts, and more preferably 18 to 22 parts.

[0030] In the present invention, the addition of alumina can improve the bonding properties of the grouting material and increase the tightness between the stones.

[0031] In the present invention, the glycerol is 5 to 10 parts, preferably 6 to 9 parts, and more preferably 7 to 8 parts.

[0032] In the present invention, the curing agent is 10 to 15 parts, preferably 11 to 14 parts, and more preferably 12 to 13 parts.

[0033] In the present invention, the curing agent is preferably diethylenetriamine, triethylenetetramine or tetraethylenepentamine.

[0034] In the present invention, the coupling agent is 5 to 10 parts, preferably 6 to 9 parts, and more preferably 7 to 8 parts.

[0035] In the present invention, the coupling agent is preferably KH-550, KH-560, KH-580 or A-186.

[0036] In the present invention, the water is 100 to 120 parts, preferably 105 to 115 parts, and more preferably 108 to 112 parts.

[0037] In the present invention, isocyanate and epoxy resin are cross-linked to form an adhesive, which is then filled into the goaf to enhance bonding ability. Simultaneously, the adhesive is combined with silicate cement to enhance mechanical strength, thereby improving the compressive strength of the grouting material.

[0038] The present invention also provides a method for preparing the grouting material, comprising the following steps:

[0039] (1) mixing isocyanate, epoxy resin, polyethylene glycol, glycerin, coupling agent and the first portion of water to obtain an intermediate material;

[0040] (2) The intermediate material and the remaining raw materials are mixed to obtain the grouting material.

[0041] In the present invention, the mass ratio of the first portion of water to water in step (1) is preferably 1:2-3, more preferably 1:2.2-2.8, and even more preferably 1:2.4-2.6.

[0042] In the present invention, the mixing method in step (1) is preferably stirring, and the stirring speed is preferably 60 to 100 rpm, more preferably 70 to 90 rpm, and more preferably 75 to 85 rpm.

[0043] In the present invention, the mixing is preferably a first-step mixing and a second-step mixing performed sequentially.

[0044] In the present invention, the temperature of the first mixing step is preferably 40-50°C, more preferably 42-48°C, and more preferably 44-46°C; the time of the first mixing step is preferably 1-2h, more preferably 1.2-1.8h, and more preferably 1.4-1.6h.

[0045] In the present invention, the temperature of the second step mixing is preferably 60-70°C, more preferably 62-68°C, and more preferably 64-66°C; the time of the second step mixing is preferably 1-2h, more preferably 1.2-1.8h, and more preferably 1.4-1.6h.

[0046] In the present invention, the mixing method in step (2) is preferably stirring, and the stirring speed is preferably 120 to 150 rpm, more preferably 130 to 140 rpm; the stirring time is preferably 2 to 3 hours, more preferably 2.2 to 2.8 hours, and more preferably 2.4 to 2.6 hours.

[0047] The technical solutions provided by the present invention are described in detail below with reference to the embodiments, but they should not be construed as limiting the scope of protection of the present invention.

[0048] Example 1

[0049] 1kg of silicate cement, 500g of Wenlun glue, 350g of toluene diisocyanate, 150g of bisphenol A epoxy resin, 230g of polyethylene glycol, 200g of alumina, 80g of glycerol, 130g of diethylenetriamine, 70g of KH-550, and 1100g of water.

[0050] Toluene diisocyanate, bisphenol A epoxy resin, polyethylene glycol, glycerol, KH-550 and 440 g of water were mixed, the stirring rate was controlled at 90 rpm, and the mixture was stirred at 45° C. for 1.5 h, and then at 65° C. for 1.5 h to obtain an intermediate material;

[0051] The intermediate material and the remaining raw materials were mixed and stirred at a speed of 130 rpm for 2.5 h to obtain the grouting material.

[0052] The performance of the grouting material prepared in this example was measured, and the results are recorded in Table 1.

[0053] Example 2

[0054] 80kg of Portland cement, 40kg of Wenlun glue, 30kg of diphenylmethane diisocyanate, 10kg of bisphenol F epoxy resin, 20kg of polyethylene glycol, 15kg of alumina, 5kg of glycerol, 10kg of triethylenetetramine, 5kg of KH-560, and 100kg of water.

[0055] Mix diphenylmethane diisocyanate, bisphenol F epoxy resin, polyethylene glycol, glycerol, KH-560 and 50 kg of water, control the stirring rate to 60 rpm, stir at 40 ° C for 1 hour, and then stir at 60 ° C for 1 hour to obtain an intermediate material;

[0056] The intermediate material and the remaining raw materials were mixed and stirred at a speed of 120 rpm for 2 h to obtain the grouting material.

[0057] The performance of the grouting material prepared in this example was measured, and the results are recorded in Table 1.

[0058] Example 3

[0059] 90kg of Portland cement, 45kg of Wenlun glue, 32kg of hexamethylene diisocyanate, 14kg of polyphenol type glycidyl ether epoxy resin, 22kg of polyethylene glycol, 18kg of alumina, 7kg of glycerol, 12kg of tetraethylene pentamine, 6kg of KH-580, and 108kg of water.

[0060] Hexamethylene diisocyanate, polyphenol glycidyl ether epoxy resin, polyethylene glycol, glycerol, KH-580 and 50 kg of water were mixed, the stirring rate was controlled at 75 rpm, and the mixture was stirred at 44 ° C for 1.4 hours, and then stirred at 64 ° C for 1.4 hours to obtain an intermediate material;

[0061] The intermediate material and the remaining raw materials were mixed and stirred at a speed of 140 rpm for 2.4 h to obtain the grouting material.

[0062] The performance of the grouting material prepared in this example was measured, and the results are recorded in Table 1.

[0063] Example 4

[0064] 105g Portland cement, 52g Wenlun glue, 36g dicyclohexylmethane diisocyanate, 16g bisphenol A epoxy resin, 23g polyethylene glycol, 22g alumina, 8g glycerol, 13g diethylenetriamine, 8g A-186, and 112g water.

[0065] Dicyclohexylmethane diisocyanate, bisphenol A epoxy resin, polyethylene glycol, glycerol, A-186 and 40 g of water were mixed, the stirring rate was controlled at 85 rpm, and the mixture was stirred at 46° C. for 1.6 h, and then at 66° C. for 1.6 h to obtain an intermediate material;

[0066] The intermediate material and the remaining raw materials were mixed and stirred at a speed of 150 rpm for 2.6 h to obtain the grouting material.

[0067] The performance of the grouting material prepared in this example was measured, and the results are recorded in Table 1.

[0068] Example 5

[0069] 110g Portland cement, 55g Wenlun glue, 38g diphenylmethane diisocyanate, 18g bisphenol F epoxy resin, 24g polyethylene glycol, 24g alumina, 9g glycerol, 14g tetraethylene pentamine, 9g KH-550, and 115g water.

[0070] Mix diphenylmethane diisocyanate, bisphenol F epoxy resin, polyethylene glycol, glycerol, KH-550 and 45 g of water, control the stirring rate to 90 rpm, stir at 48 ° C for 1.8 hours, and then stir at 68 ° C for 1.8 hours to obtain an intermediate material;

[0071] The intermediate material and the remaining raw materials were mixed and stirred at a speed of 150 rpm for 2.8 h to obtain the grouting material.

[0072] The performance of the grouting material prepared in this example was measured, and the results are recorded in Table 1.

[0073] Table 1

[0074]

[0075] From the above embodiments, it can be seen that the present invention provides a grouting material that combines organic and inorganic materials, has good mechanical properties after solidification, fast setting time, and a compressive strength of up to 25.5 MPa, and can effectively fill goaf.

[0076] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A grouting material, characterized in that: The preparation method is prepared from the following raw materials in parts by weight: 80-120 parts of Portland cement, 40-60 parts of Wenlun glue, 30-40 parts of isocyanate, 10-20 parts of epoxy resin, 20-25 parts of polyethylene glycol, 15-25 parts of aluminum oxide, 5-10 parts of glycerin, 10-15 parts of curing agent, 5-10 parts of coupling agent, and 100-120 parts of water.

2. The grouting material according to claim 1, wherein The isocyanate is toluene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate or dicyclohexylmethane diisocyanate.

3. The grouting material according to claim 1 or 2, wherein: The epoxy resin is bisphenol A epoxy resin, bisphenol F epoxy resin or polyphenol glycidyl ether epoxy resin.

4. The grouting material according to claim 3, wherein The curing agent is diethylenetriamine, triethylenetetramine or tetraethylenepentamine.

5. The grouting material according to claim 1, 2 or 4, wherein: The coupling agent is KH-550, KH-560, KH-580 or A-186.

6. The method for preparing the grouting material according to any one of claims 1 to 5, characterized in that: It includes the following steps: (1) mixing isocyanate, epoxy resin, polyethylene glycol, glycerin, coupling agent and the first portion of water to obtain an intermediate material; (2) The intermediate material and the remaining raw materials are mixed to obtain the grouting material.

7. The preparation method according to claim 6, wherein The mass ratio of the first part of water to water in step (1) is 1:2-3.

8. The preparation method according to claim 6 or 7, characterized in that The mixing method in step (1) is stirring, and the stirring speed is 60-100 rpm; The mixing is a first step mixing and a second step mixing performed sequentially; The temperature of the first step mixing is 40-50° C., and the time of the first step mixing is 1-2 hours.

9. The preparation method according to claim 8, wherein The temperature of the second mixing step is 60-70° C., and the time of the second mixing step is 1-2 hours.

10. The preparation method according to claim 9, characterized in that The mixing method in step (2) is stirring, the stirring speed is 120-150 rpm, and the stirring time is 2-3 hours.

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