Epoxy organic mortar containing graded waste tire aggregate as well as preparation method and application of epoxy organic mortar

Abstract

The invention belongs to the technical field of building materials, and provides epoxy organic mortar containing graded waste tire aggregate and a preparation method of the epoxy organic mortar. The graded waste tire aggregate formed by combining different meshes of waste tire aggregates is adopted as the organic aggregate, and the bisphenol A epoxy resin and the epoxy reactive diluent are matched to serve as the main raw material components of the epoxy organic mortar, so that the system is stable, the sedimentation phenomenon cannot be generated in the storage process, the high strength and the excellent toughness are achieved, and the service life of the epoxy organic mortar is prolonged. According to the present invention, the obtained thin-layer veneer material has characteristics of no cracking and long service life, can be further used for preparing ground or pavement materials, has excellent anti-fatigue performance, and can substantially prolong the service life of the thin-layer veneer material frequently bearing the rolling load, and the adopted waste tire powder belongs to the solid waste, and can be used for manufacturing the green building material.

Description

Technical Field

[0001] The invention relates to the technical field of building materials, and more specifically to an epoxy organic mortar containing graded waste tire aggregates and a preparation method thereof. Background Art

[0002] Epoxy mortar is a thin-layer construction system, which usually uses epoxy resin as the cementing material, quartz sand as the aggregate, and quartz powder as the filler. It can be used for building and ground reinforcement, epoxy floor construction, etc.

[0003] Epoxy mortar used for ground or road surface, in addition to the basic requirements of compressive strength and flexural strength, needs to withstand repeated rolling pressure without fatigue damage. Although the existing epoxy mortar has high compressive strength and flexural strength, the properties of epoxy resin and quartz sand are very different. The actual density of epoxy resin is 1g / cm 3 Below 2.5 g / cm2, it is lipophilic; while the actual density of inorganic powder (such as quartz sand) is 2.5 g / cm2. 3 About 100%, which is hydrophilic, and there is a large density difference and polarity between the two. Therefore, in order to make the two compatible, it is necessary to design a complex formula so that the two can achieve a balance between hydrophilicity and lipophilicity. However, this system is still not stable enough, the filler is easy to settle, and various drawbacks are shown. At the same time, the addition of inorganic fillers, although it improves the surface hardness of the epoxy resin curing system, reduces the low toughness of the epoxy resin itself, and is prone to cracking in practical applications.

[0004] Therefore, it is urgent to develop an epoxy mortar with high toughness and not easy to crack. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the above-mentioned prior art. To this end, the present invention proposes an epoxy organic mortar containing graded waste tire aggregates and a preparation method and application thereof. The epoxy organic mortar containing graded waste tire aggregates provided by the present invention has better fatigue resistance to dynamic loads, a more compatible system, excellent fatigue resistance, and higher strength (tensile strength can reach 24.2MPa, compressive strength can reach 77MPa, flexural strength can reach 11.8MPa, and impact strength can reach 6.2KJ / m 2 ) and excellent toughness (in the bending fatigue test, it can withstand up to 4500 alternating loads without destructive cracks, and the elongation can reach 3.2%), it is not easy to crack, and its stability and wear resistance are also significantly improved. It can be further used as ground, road surface materials, and building materials. It can greatly extend the service life of this thin layer of veneer material that frequently bears rolling loads, and at the same time consumes solid waste resources such as waste tires, and is a green building material.

[0006] A first aspect of the present invention provides an epoxy organic mortar containing graded waste tire aggregate.

[0007] Specifically, an epoxy organic mortar containing graded waste tire aggregates includes the following raw material components:

[0008] Bisphenol A epoxy resin, epoxy reactive diluent and graded waste tire aggregate;

[0009] The mesh sizes of the graded waste tire aggregate are selected from at least two of 4 mesh, 8 mesh, 16 mesh, 20 mesh, 28 mesh, 30 mesh, 40 mesh, 48 mesh, 60 mesh, and 100 mesh.

[0010] The present invention uses graded waste tire aggregates composed of waste tire aggregates of different particle sizes as organic aggregates. Since the raw material is waste tires, which are cross-linked rubbers, it can not only have a toughening effect on the epoxy resin thermosetting system, but also greatly improve the overall impact resistance, fatigue resistance and wear resistance of the material (for the epoxy system, the higher the hardness, the better the wear resistance); and the density of the graded waste tire aggregates and the epoxy resin is close, so that the organic mortar system is stable, and no sedimentation will occur during storage, and it is not easy to crack, which helps to extend the service life. In addition, the graded waste tire aggregates composed of waste tire aggregates of different particle sizes can make the aggregates fill the gaps of the epoxy mortar as densely as possible, reduce the amount of epoxy resin, and at the same time make the mortar layer have better workability and higher compressive strength.

[0011] Graded aggregate: refers to the mixing of aggregates of different particle sizes together as mixed aggregate used in building materials such as mortar.

[0012] Preferably, the graded waste tire aggregate is a continuously graded aggregate obtained by processing waste tires (specifically, the waste tires are processed through a process of tearing, separating steel wires, and grinding).

[0013] Preferably, the epoxy organic mortar comprises the following raw material components in parts by weight:

[0014] 30-50 parts of bisphenol A epoxy resin,

[0015] Epoxy reactive diluent 5-20 parts,

[0016] 30-100 parts of graded waste tire aggregate.

[0017] Further preferably, the epoxy organic mortar comprises the following raw material components in parts by weight:

[0018] 30-40 parts of bisphenol A epoxy resin,

[0019] Epoxy reactive diluent 5-20 parts,

[0020] 30-40 parts of graded waste tire aggregate.

[0021] Preferably, the mesh sizes of the graded waste tire aggregate are selected from at least three of 4 mesh, 8 mesh, 16 mesh, 28 mesh, 48 mesh and 100 mesh.

[0022] Further preferably, the graded waste tire aggregate is a combination of 4-mesh, 8-mesh, 16-mesh, 28-mesh, 48-mesh and 100-mesh waste tire aggregates, or the graded waste tire aggregate is a combination of 8-mesh, 16-mesh, 28-mesh, 48-mesh and 100-mesh waste tire aggregates, or the graded waste tire aggregate is a combination of 16-mesh, 28-mesh, 48-mesh and 100-mesh waste tire aggregates, or the graded waste tire aggregate is a combination of 28-mesh, 48-mesh and 100-mesh waste tire aggregates. When the organic mortar is relatively thin, coarse aggregate may not be used, for example, 4-mesh, 8-mesh and 16-mesh waste tire aggregates may not be added.

[0023] Preferably, the weight ratio of the graded waste tire aggregates of 4 mesh, 8 mesh, 16 mesh, 28 mesh, 48 mesh and 100 mesh is (0-20): (0-40): (10-80): (41-200): (70-320): (80-340).

[0024] Further preferably, the weight ratio of the graded waste tire aggregates of 4 mesh, 8 mesh, 16 mesh, 28 mesh, 48 mesh and 100 mesh is (0-10): (0-25): (10-50): (41-70): (70-92): (80-94).

[0025] Preferably, the epoxy organic mortar further comprises bisphenol F type epoxy resin and / or a curing agent.

[0026] Further preferably, the epoxy organic mortar further comprises 0.01-20 parts of bisphenol F epoxy resin and / or 5-10 parts of curing agent in parts by weight.

[0027] Preferably, the bisphenol A epoxy resin is E51 liquid epoxy resin and / or E44 liquid epoxy resin.

[0028] Preferably, the bisphenol F epoxy resin is epoxy resin 830.

[0029] Preferably, the epoxy reactive diluent is at least one of butyl glycidyl ether, octyl glycidyl ether, dodecyl glycidyl ether, neopentyl glycol diglycidyl ether, 1,4-butanediol diglycidyl ether, dipropylene glycol diglycidyl ether, dimethylolpropane triglycidyl ether, and ethylene glycol diglycidyl ether.

[0030] Preferably, the curing agent is selected from epoxy resin curing agents (such as T31, DDSA, TMPDA, H113).

[0031] A second aspect of the present invention provides a method for preparing epoxy organic mortar containing graded waste tire aggregate.

[0032] A method for preparing epoxy organic mortar containing graded waste tire aggregates comprises the following steps:

[0033] (1) mixing bisphenol A epoxy resin and epoxy reactive diluent to form a resin material;

[0034] (2) Preparing graded waste tire aggregate;

[0035] (3) Mixing the resin material and the graded waste tire aggregate to obtain the epoxy organic mortar.

[0036] Preferably, in step (1), bisphenol A epoxy resin, bisphenol F epoxy resin and epoxy reactive diluent are mixed to form a resin material.

[0037] Preferably, in step (2), waste tire aggregates of different mesh sizes are mixed to prepare graded waste tire aggregates.

[0038] Preferably, in step (3), after the resin material and the graded waste tire aggregate are mixed, a curing agent is added to obtain the epoxy organic mortar.

[0039] A third aspect of the present invention provides a use of epoxy organic mortar containing graded waste tire aggregate.

[0040] The invention discloses an application of epoxy organic mortar containing graded waste tire aggregate in building materials, ground materials and pavement materials.

[0041] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0042] The invention adopts graded waste tire aggregates composed of waste tire aggregates of different mesh sizes as organic aggregates, and uses bisphenol A epoxy resin and epoxy reactive diluent as main raw material components of epoxy organic mortar. The graded waste tire aggregates play a toughening effect, so that the overall impact resistance, fatigue resistance and wear resistance of the material are greatly improved; and the density of the graded waste tire aggregates and the epoxy resin is close, so that the organic mortar system is stable, and no sedimentation phenomenon occurs during storage, and the organic mortar has high strength (tensile strength can reach 24.2MPa, compressive strength can reach 77MPa, bending strength can reach 11.8MPa, and impact strength can reach 6.2KJ / m 2) and excellent toughness (in the bending fatigue test, it can withstand up to 4500 alternating loads without destructive cracks, and the elongation can reach 3.2%), it is not easy to crack, which helps to extend the service life; the graded waste tire aggregates composed of waste tire aggregates of different particle sizes are also conducive to reducing the amount of epoxy resin used, while making the mortar layer have better workability and higher compressive strength. The epoxy organic mortar of the present invention can be further used to prepare ground materials, road materials, and building materials. It has excellent fatigue resistance and can greatly extend the service life of such thin-layer veneer materials that frequently bear rolling loads. In addition, the waste tire powder used in the present invention is solid waste and can be used to make green building materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a flow chart of a method for preparing epoxy organic mortar containing graded waste tire aggregate according to Example 2 of the present invention. DETAILED DESCRIPTION

[0044] In order to make the technical scheme of the present invention more clearly understood by those skilled in the art, the following embodiments are listed for illustration. It should be pointed out that the following embodiments do not limit the protection scope of the present invention.

[0045] Unless otherwise specified, the raw materials, reagents or devices used in the following examples can be obtained from conventional commercial sources or by existing known methods.

[0046] Example 1

[0047] An epoxy organic mortar containing graded waste tire aggregates comprises the following raw material components in parts by weight:

[0048] 500g bisphenol A epoxy resin,

[0049] Epoxy reactive diluent neopentyl glycol diglycidyl ether 50g,

[0050] 1000g of graded waste tire aggregate,

[0051] 50 grams of epoxy resin curing agent.

[0052] The method for preparing the epoxy organic mortar containing graded waste tire aggregate comprises the following steps:

[0053] (1) 500 g of bisphenol A epoxy resin (E51 liquid epoxy resin, produced by Hongchang Electronic Materials Co., Ltd.) and 50 g of neopentyl glycol diglycidyl ether (epoxy reactive diluent) were mixed uniformly to form a resin material;

[0054] (2) Graded waste tire aggregates (Dongguan Dongjiao Industrial Co., Ltd.) with mesh sizes of 4 mesh, 8 mesh, 16 mesh, 28 mesh, 48 mesh, and 100 mesh were mixed to prepare graded waste tire aggregates, wherein the weight ratio of the graded waste tire aggregates with mesh sizes of 4 mesh, 8 mesh, 16 mesh, 28 mesh, 48 mesh, and 100 mesh is 20:40:80:200:320:340;

[0055] (3) mixing the resin material and 1000 g of graded waste tire aggregate evenly;

[0056] (4) Add 50 g of epoxy resin curing agent (aromatic amine curing agent, H113, produced by Jinan Yisheng Resin Co., Ltd.) and mix well to cure the epoxy organic mortar to obtain epoxy organic mortar.

[0057] Example 2

[0058] An epoxy organic mortar containing graded waste tire aggregate is different from Example 1 in that in step (1), the resin material is replaced by 400 grams of bisphenol A epoxy resin (E51 liquid epoxy resin, produced by Hongchang Electronic Materials Co., Ltd.) and 100 grams of bisphenol F epoxy resin, namely epoxy resin 830 (produced by Hongchang Electronic Materials Co., Ltd.). The preparation method of the epoxy organic mortar is the same as that of Example 1, specifically as follows: Figure 1 shown.

[0059] Comparative Example 1

[0060] This comparative example provides an epoxy quartz mortar, which is different from Example 1 in that the graded waste tire aggregate is replaced by an equal volume of quartz aggregate, wherein the equal volume of quartz aggregate added is 2500 grams, the grading method is the same, and the weight ratio of quartz aggregates of 4 mesh, 8 mesh, 16 mesh, 28 mesh, 48 mesh, and 100 mesh is 50:100:200:500:800:850.

[0061] Comparative Example 2

[0062] This comparative example provides an epoxy organic mortar, which is different from Example 1 in that the graded waste tire aggregate is replaced by waste tire aggregate of the same weight and of a single particle size (mesh size is 28 meshes).

[0063] Product effect testing

[0064] The epoxy organic mortars prepared in the above embodiments and comparative examples were sampled and tested, and the results are shown in the following table.

[0065] Table 1 Comparison of epoxy organic mortar performance of each embodiment and comparative example

[0066]

[0067]

[0068] As can be seen from the above table, compared with comparative example 1-2, in terms of bending fatigue resistance, Example 1-2 can withstand multiple alternating loads without destructive cracks, and the number of times is as high as 4500 times, the toughness is greatly improved, and its stability and wear resistance are also significantly improved, with a longer service life; in terms of strength, the compressive strength and bending strength have not decreased significantly, and the tensile strength and impact strength have been improved to a certain extent, indicating that the addition of graded waste tire aggregate has a low impact on the strength of the system and can meet the requirements of use. The above results show that the epoxy organic mortar provided by the present invention can have high strength and excellent toughness, is not easy to crack, and has a prolonged service life, which is of great significance in the actual use of pavements and ground.

[0069] Comparative Example 2 uses aggregates of a single size, which cannot fill the gaps in the epoxy mortar as densely as possible, which is not conducive to reducing the amount of epoxy resin used and improving the workability and compressive strength of the mortar layer.

Claims

1. An epoxy organic mortar, characterized in that: The raw material components include: Bisphenol A epoxy resin, epoxy reactive diluent and graded waste tire aggregate; The mesh sizes of the graded waste tire aggregate are selected from at least two of 4 mesh, 8 mesh, 16 mesh, 20 mesh, 28 mesh, 30 mesh, 40 mesh, 48 mesh, 60 mesh, and 100 mesh.

2. The epoxy organic mortar according to claim 1, characterized in that: The epoxy organic mortar comprises the following raw material components in parts by weight: 30-50 parts of bisphenol A epoxy resin, Epoxy reactive diluent 5-20 parts, 30-100 parts of graded waste tire aggregate.

3. The epoxy organic mortar according to claim 1, characterized in that: The mesh sizes of the graded waste tire aggregate are selected from at least three of 4 mesh, 8 mesh, 16 mesh, 28 mesh, 48 mesh and 100 mesh.

4. The epoxy organic mortar according to claim 1, characterized in that: The bisphenol A type epoxy resin is E51 liquid epoxy resin and / or E44 liquid epoxy resin.

5. The epoxy organic mortar according to claim 1, characterized in that: The epoxy active diluent is at least one of butyl glycidyl ether, octyl glycidyl ether, dodecyl glycidyl ether, neopentyl glycol diglycidyl ether, 1,4-butanediol diglycidyl ether, dipropylene glycol diglycidyl ether, dimethylolpropane triglycidyl ether, and ethylene glycol diglycidyl ether.

6. The epoxy organic mortar according to claim 1, characterized in that: The epoxy organic mortar further comprises bisphenol F type epoxy resin and / or a curing agent.

7. The epoxy organic mortar according to claim 6, characterized in that: The bisphenol F type epoxy resin is epoxy resin 830.

8. The epoxy organic mortar according to claim 6, characterized in that: The curing agent is selected from epoxy resin curing agents.

9. The method for preparing the epoxy organic mortar according to any one of claims 1 to 8, characterized in that: The following steps are involved: (1) mixing bisphenol A epoxy resin and epoxy reactive diluent to form a resin material; (2) Preparing graded waste tire aggregate; (3) Mixing the resin material and the graded waste tire aggregate to obtain the epoxy organic mortar.

10. Use of the epoxy organic mortar according to any one of claims 1 to 8 in building materials, ground materials and pavement materials.

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