Rapid repairing material and preparation method thereof

Abstract

The invention mainly relates to the technical field of building materials, in particular to a rapid repairing material and a preparation method thereof. The concrete is prepared from the following components in parts by weight: 5-10 parts of a cementing material, 30-40 parts of Portland cement, 2-5 parts of a mineral admixture, 40-50 parts of standard sand, 0.2-0.3 part of a polycarboxylate superplasticizer, 0.2-0.3 part of a defoaming agent, 0.2-0.3 part of an early strength agent, 0.1-0.2 part of a retarder and 12-16 parts of water. According to the technical scheme, the microstructure is optimized by means of micro aggregate filling and secondary pozzolanic reaction of industrial solid waste, durability is improved, meanwhile, cement is replaced, carbon emission and material cost are reduced, and collaborative optimization of performance, environmental protection and cost is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building materials, in particular to a rapid repair material and a preparation method thereof. BACKGROUND

[0002] At present, the materials for rapid repair of roads and buildings are mainly divided into cement-based, polymer-based and self-repairing materials. Although the cement-based material can achieve high compressive strength in a short time, the single early strength system can easily lead to a decrease in construction operability and poor durability. The polymer-based rapid repair material is widely used in the field of aerospace, but its cost is high. The production process of the self-repairing rapid repair material is relatively complex, and it is difficult to be widely applied.

[0003] Therefore, there is an urgent need for a rapid repair material and a preparation method thereof to solve the above problems. SUMMARY

[0004] To achieve the above-mentioned purpose, the following technical solutions are implemented. A rapid repair material, consisting of the following components by weight: 5-10 parts of cementing material, 30-40 parts of Portland cement, 2-5 parts of mineral admixture, 40-50 parts of standard sand, 0.2-0.3 parts of polycarboxylate superplasticizer, 0.2-0.3 parts of defoaming agent, 0.2-0.3 parts of early strength agent, 0.1-0.2 parts of retarder and 12-16 parts of water. Further, the strength grade of the cementing material is 72.5, and the Portland cement is type II Portland cement with a strength grade of 52.5.

[0005] Further, the mineral admixture includes any one or combination of anhydrous fluorogypsum, silica fume and slag powder.

[0006] Further, the early strength agent is any one or combination of calcium formate and lithium sulfate.

[0007] Further, the retarder is DL-tartaric acid.

[0008] Further, a preparation method of a rapid repair material is prepared by the following steps: Step 100, dry mixing of raw materials, mixing the cementing material, Portland cement, mineral admixture, polycarboxylate superplasticizer, defoaming agent, early strength agent and retarder according to the preset proportion to obtain a mixture; Step 200, preparation of mortar, adding the mixture in step 100 and the standard sand and water in a preset proportion into a mixer and mixing uniformly to obtain mortar; Step 300, making a test piece, the mortar in step 200 is filled into a test mold, vibrated several times to expel air, to obtain a rapid repair material, then the surface is leveled, the rapid repair material is poured into the position to be repaired and cured.

[0009] Compared with the prior art, the beneficial effects of the present application are: 1. The technical scheme of the present application has outstanding early strength performance through the synergistic effect of multiple components. The cementing material and Portland cement form a high-strength base, and calcium formate, lithium sulfate and other early strength agents are used to accelerate cement hydration. At the same time, anhydrous fluorgypsum and other industrial solid wastes react with cement hydration products in an alkaline environment to generate ettringite and other cementitious substances, thereby significantly improving the early strength of the material and achieving rapid hardening. 2. The technical scheme in the present application optimizes the durability of the material by compounding industrial solid wastes. Mineral admixtures such as silica fume and slag powder reduce porosity, refine pore size distribution, and generate low calcium-silicon ratio C-S-H gel with cement hydration products, thereby strengthening the interface transition zone structure and improving the durability of the material such as impermeability and sulfate resistance, thereby prolonging the service life of the repair body. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a flow process diagram of the preparation method in the present application; Figure 1 Figure 2 is a reference diagram of the rapid repair material prepared in the present application in actual use. Figure 3 is a reference diagram of the rapid repair material prepared in the present application in actual use. Figure 2 Figure 4 is a reference diagram of the rapid repair material prepared in the present application in actual use. DETAILED DESCRIPTION

[0011] The present application will be further described in conjunction with the drawings and specific examples. It should be understood that these examples are only used to illustrate the present application and not to limit the scope of the present application. In addition, it should be understood that those skilled in the art can make various modifications or modifications to the present application after reading the content taught by the present application, and these equivalent forms also fall within the scope defined by the present application.

[0012] A rapid repair material, consisting of the following components by weight: 5-10 parts of cementing material, 30-40 parts of Portland cement, 2-5 parts of mineral admixture, 40-50 parts of standard sand, 0.2-0.3 parts of polycarboxylate superplasticizer, 0.2-0.3 parts of defoaming agent, 0.2-0.3 parts of early strength agent, 0.1-0.2 parts of retarder and 12-16 parts of water.

[0013] The strength grade of the cementing material is 72.5, and the Portland cement is type II Portland cement with a strength grade of 52.5.

[0014] The mineral admixtures include any one or combination of anhydrous fluorspar, silica fume, and slag powder. Anhydrous fluorspar, silica fume, and slag powder are industrial solid wastes, which have shown excellent effects in improving early strength, improving durability, adjusting setting time, and environmental protection. First, industrial solid wastes can react with cement hydration products in an alkaline environment to generate substances such as calcium aluminoferrite and hydrated calcium silicate to enhance structural strength. For example, silica fume has high volcanic ash activity and generates hydraulic cementitious substances under the stimulation of cement hydration products, and its tiny particles fill the voids in the cementitious system, making its structure more compact and improving early strength. Second, industrial solid wastes can optimize the microstructure of the material, increase density, and reduce harmful pores. For example, the secondary volcanic ash effect of slag powder can react with cement hydration products to improve impermeability and sulfate corrosion resistance. Third, with early strength agents and retarder Coagulants are used in combination to regulate the cement hydration process and meet the special requirements of rapid repair for setting time. For example, anhydrous fluorgypsum releases calcium ions and sulfate ions by dissolving, which can react with cement hydration products to form calcium aluminoferrite crystals, which act as heterogeneous crystal nuclei to accelerate hydration and form a three-dimensional skeleton, and work together with early strength agents to shorten the initial setting time and improve early strength; Fourth, traditional rapid repair materials are not environmentally friendly enough during production and use, have high carbon emissions, and do not fully utilize industrial waste. The use of industrial solid waste in this application realizes resource recycling, greatly reduces CO2 emissions, and has significant environmental benefits.

[0015] The early strength agent is any one of calcium formate and lithium sulfate or a combination thereof, and the retarder is DL-tartaric acid.

[0016] A method for preparing the above-mentioned rapid repair material, as shown in the attached Figure 1 As shown, it is made by the following steps: Step 100, dry mixing of raw materials, wherein the binder, Portland cement, mineral admixture, polycarboxylate water reducer, defoamer, early strength agent, and retarder are mixed uniformly according to a preset ratio to obtain a mixture; Step 200, preparing mortar, adding the mixed material in step 100 and a preset proportion of standard sand and water into a mixer, and mixing them evenly to obtain mortar; Step 300, make a test piece, put the mortar in step 200 into the test mold, vibrate it several times to expel the air, get the quick repair material, then scrape the surface flat, pour the quick repair material at the location to be repaired and maintain it, as shown in the attached Figure 2 shown.

[0017] Example 1 A rapid repair material, consisting of the following components in parts by weight: 8 parts of binder with a strength grade of 72.5, 35 parts of type II Portland cement with a strength grade of 52.5, 5 parts of anhydrous fluorogypsum, 45 parts of standard sand, 0.25 parts of polycarboxylic acid water reducer, 0.5 parts of defoaming agent, 0.3 parts of early strength agent, 0.15 parts of DL-tartaric acid, and 14 parts of water, wherein the early strength agent comprises 0.2 parts of calcium formate and 0.1 parts of lithium sulfate.

[0018] A preparation method for preparing the rapid repair material, comprising the following steps: Step 100, dry mixing of raw materials, mixing the raw materials except for the standard sand and water according to a preset ratio to obtain a mixture; Step 200, preparation of mortar, adding the mixture in step 100 and the standard sand and water in a preset ratio into a mixer and mixing uniformly to obtain mortar; Step 300, production of test pieces, loading the mortar in step 200 into a test mold, vibrating several times to expel air, obtaining the rapid repair material, then leveling the surface, pouring the rapid repair material at a location requiring repair, and curing.

[0019] Example 2 A rapid repair material, consisting of the following components in parts by weight: 6 parts of binder with a strength grade of 72.5, 38 parts of type II Portland cement with a strength grade of 52.5, 5 parts of mineral admixture, 42 parts of standard sand, 0.3 parts of polycarboxylic acid water reducer, 0.2 parts of defoaming agent, 0.3 parts of calcium formate, 0.2 parts of DL-tartaric acid, and 15 parts of water, wherein the mineral admixture comprises 2 parts of silica fume and 3 parts of slag powder.

[0020] A preparation method for preparing the rapid repair material, comprising the following steps: Step 100, dry mixing of raw materials, mixing the raw materials except for the standard sand and water according to a preset ratio to obtain a mixture; Step 200, preparation of mortar, adding the mixture in step 100 and the standard sand and water in a preset ratio into a mixer and mixing uniformly to obtain mortar; Step 300, production of test pieces, loading the mortar in step 200 into a test mold, vibrating several times to expel air, obtaining the rapid repair material, then leveling the surface, pouring the rapid repair material at a location requiring repair, and curing.

[0021] Example 3 A rapid repair material, consisting of the following components in parts by weight: 10 parts of a binder with a strength grade of 72.5, 30 parts of type II Portland cement with a strength grade of 52.5, 5 parts of slag powder, 50 parts of standard sand, 0.2 parts of a polycarboxylic acid water reducer, 0.3 parts of a defoaming agent, 0.3 parts of lithium sulfate, 0.1 parts of DL-tartaric acid, and 12 parts of water.

[0022] A preparation method for preparing the rapid repair material described above, comprising the following steps: Step 100, dry mixing of raw materials, mixing the raw materials described above except for the standard sand and water in a predetermined proportion to obtain a mixture; Step 200, preparation of mortar, adding the mixture in step 100 and the standard sand and water in a predetermined proportion to a mixer, and mixing uniformly to obtain mortar; Step 300, production of test pieces, loading the mortar in step 200 into a test mold, vibrating several times to expel air, obtaining the rapid repair material, and then scraping the surface, pouring the rapid repair material at the location to be repaired and curing.

[0023] The rapid repair materials prepared in Examples 1-3 were subjected to performance tests, and the performance test results are shown in the following table:

[0024] From the performance test data in the above table, it can be concluded that the rapid repair material prepared in the present application is superior to traditional materials in terms of early strength, construction performance and environmental protection through the synergistic design of industrial solid waste and cementitious system, among which the anhydrous fluorogypsum compound system is suitable for emergency repair, the silica fume-slag powder system is suitable for projects with high durability requirements, and the slag powder single system takes into account the cost and performance, providing a customizable solution for rapid repair in different scenarios.

[0025] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing examples, or make equivalent substitutions for part of the technical features; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A rapid repair material, characterized by: The present invention is composed of the following components in parts by weight: 5-10 parts of binder, 30-40 parts of Portland cement, 2-5 parts of mineral admixture, 40-50 parts of standard sand, 0.2-0.3 parts of polycarboxylic acid water reducer, 0.2-0.3 parts of defoamer, 0.2-0.3 parts of early strength agent, 0.1-0.2 parts of retarder and 12-16 parts of water.

2. A rapid repair material according to claim 1, characterized in that: The strength grade of the binder is 72.5, and the silicate cement is Type II silicate cement with a strength grade of 52.

5.

3. The rapid repair material according to claim 1, characterized in that: The mineral admixture includes any one or a combination of anhydrous fluorgypsum, silica fume and slag powder.

4. The rapid repair material according to claim 1, characterized in that: The early strength agent is any one of calcium formate and lithium sulfate or a combination thereof.

5. The rapid repair material according to claim 1, characterized in that: The retarder is DL-tartaric acid.

6. A method for preparing the rapid repair material according to any one of claims 1 to 5, characterized in that: Made by the following steps: Step 100, dry mixing of raw materials, wherein the binder, Portland cement, mineral admixture, polycarboxylate water reducer, defoamer, early strength agent, and retarder are mixed uniformly according to a preset ratio to obtain a mixture; Step 200, preparing mortar, adding the mixed material in step 100 and a preset proportion of standard sand and water into a mixer, and mixing them evenly to obtain mortar; Step 300, making a test piece, putting the mortar in step 200 into the test mold, vibrating it several times to expel the air, obtaining a quick repair material, then smoothing the surface, pouring the quick repair material at the location to be repaired and curing it.

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