Ceramic waste powder wet-mixed mortar and preparation method thereof

Abstract

The invention discloses a ceramic waste powder wet-mixed mortar, and relates to the technical field of mortar preparation through waste recovery, the ceramic waste powder wet-mixed mortar comprises the following raw materials by weight: 20-40 parts of cement, 60-80 parts of fine sand, 20-40 parts of ceramic waste powder, 2-2.4 parts of a water reducer, 1-8 parts of hydroxypropyl methyl cellulose ether, 0.1-1.6 parts of an air entraining agent containing a surfactant, 0.05-3.2 parts of a retarder, 0.5-2.4 parts of amino silane, and 1-4.8 parts of polypropylene fiber; the invention also provides a preparation method of the ceramic waste powder wet-mixed mortar. The preparation method specifically comprises the following steps: S100, pretreating the ceramic waste powder; s200, proportioning and dry mixing; s300, dissolving an auxiliary agent; s400, carrying out wet mixing; s500, adding fibers; s600, consistency adjustment is carried out; and S700, stirring is carried out. According to the ceramic waste powder wet-mixed mortar and the preparation method thereof disclosed by the invention, the air entraining agent containing the surfactant can introduce tiny closed bubbles, and the amino silane can reduce the permeability of the mortar and improve the impermeability, so that the weather resistance and the waterproof performance of the mortar are jointly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste recycling for preparing mortar, and specifically to a wet-mixed mortar made from ceramic waste powder and its preparation method. Background Art

[0002] Wet-mixed mortar made from ceramic waste powder is a new type of mortar product that utilizes ceramic waste residue resources. After pretreatment, it is used as part of the fine aggregate to replace traditional sand and is mixed and stirred with cement, water, and various additives in a certain proportion. This mortar not only realizes the resource utilization of waste, reduces environmental pollution, but also greatly improves the mechanical properties, durability, and construction performance of the mortar.

[0003] Since ceramic waste residue contains heavy metals and other harmful impurities, certain technical means are required in the process of recycling ceramic waste residue. Ceramic waste residue can be recycled for production. Relatively speaking, the recycling cost of ceramic waste powder is also relatively high. At present, using ceramic waste residue to prepare mortar has become a trend. On the one hand, it can avoid the high recycling cost of ceramic waste residue, and on the other hand, it can actively utilize ceramic waste residue. Among them, how to improve the recycling rate of ceramic waste residue is a technical problem that needs to be solved urgently at present. Therefore, we propose a wet-mixed mortar made from ceramic waste powder and its preparation method. Summary of the Invention

[0004] The purpose of this application is to provide a wet-mixed mortar made from ceramic waste powder and its preparation method, which can effectively solve the problems raised in the above background art.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: A wet-mixed mortar made from ceramic waste powder, comprising the following raw materials in parts by weight:

[0006] 20 - 40 parts of cement, 60 - 80 parts of fine sand, 20 - 40 parts of ceramic waste powder, 2 - 2.4 parts of water reducing agent, 1 - 8 parts of hydroxypropyl methyl cellulose ether, 0.1 - 1.6 parts of air-entraining agent containing surfactant, 0.05 - 3.2 parts of retarder, 0.5 - 2.4 parts of amino silane, and 1 - 4.8 parts of polypropylene fiber.

[0007] Preferably, it comprises the following raw materials in parts by weight:

[0008] 20 - 40 parts of cement, 60 - 80 parts of fine sand, 20 - 40 parts of ceramic waste powder, 2 - 2.4 parts of water reducing agent, 1 - 8 parts of hydroxypropyl methyl cellulose ether, 0.1 - 1.6 parts of air-entraining agent containing surfactant, 0.05 - 3.2 parts of retarder, 0.5 - 2.4 parts of amino silane, 1 - 4.8 parts of polypropylene fiber, and 5 - 16 parts of sulfoaluminate-based expansive agent.

[0009] Preferably, it comprises the following raw materials in parts by weight:

[0010] 20 - 40 parts of cement, 60 - 80 parts of fine sand, 20 - 40 parts of ceramic waste powder, 2 - 2.4 parts of water reducing agent, 1 - 8 parts of hydroxypropyl methyl cellulose ether, 0.1 - 1.6 parts of sodium dodecyl sulfate, 0.05 - 3.2 parts of retarder, 0.5 - 2.4 parts of amino silane, 1 - 4.8 parts of polypropylene fiber.

[0011] Preferably, it comprises raw materials in the following weight parts:

[0012] 20 - 40 parts of cement, 60 - 80 parts of fine sand, 20 - 40 parts of ceramic waste powder, 2 - 2.4 parts of water reducing agent, 1 - 8 parts of hydroxypropyl methyl cellulose ether, 0.1 - 1.6 parts of sodium dodecyl sulfate, 0.05 - 3.2 parts of retarder, 0.5 - 2.4 parts of amino silane, 1 - 4.8 parts of polypropylene fiber and 5 - 16 parts of sulfoaluminate expansive agent.

[0013] Preferably, it comprises raw materials in the following weight parts:

[0014] 20 - 40 parts of cement, 60 - 80 parts of fine sand, 20 - 40 parts of ceramic waste powder, 2 - 2.4 parts of water reducing agent, 1 - 8 parts of hydroxypropyl methyl cellulose ether, 0.1 - 1.6 parts of rosin soap, 0.05 - 3.2 parts of retarder, 0.5 - 2.4 parts of amino silane, 1 - 4.8 parts of polypropylene fiber.

[0015] Preferably, it comprises raw materials in the following weight parts:

[0016] 20 - 40 parts of cement, 60 - 80 parts of fine sand, 20 - 40 parts of ceramic waste powder, 2 - 2.4 parts of water reducing agent, 1 - 8 parts of hydroxypropyl methyl cellulose ether, 0.1 - 1.6 parts of rosin soap, 0.05 - 3.2 parts of retarder, 0.5 - 2.4 parts of amino silane, 1 - 4.8 parts of polypropylene fiber and 5 - 16 parts of sulfoaluminate expansive agent.

[0017] Preferably, it comprises raw materials in the following weight parts:

[0018] 20 - 40 parts of cement, 60 - 80 parts of fine sand, 20 - 40 parts of ceramic waste powder, 2 - 2.4 parts of water reducing agent, 1 - 8 parts of hydroxypropyl methyl cellulose ether, 0.1 - 1.6 parts of sodium dodecyl sulfate, 0.05 - 3.2 parts of potassium sodium tartrate, 0.5 - 2.4 parts of amino silane, 1 - 4.8 parts of polypropylene fiber.

[0019] Preferably, it comprises raw materials in the following weight parts:

[0020] 20 - 40 parts of cement, 60 - 80 parts of fine sand, 20 - 40 parts of ceramic waste powder, 2 - 2.4 parts of water reducing agent, 1 - 8 parts of hydroxypropyl methyl cellulose ether, 0.1 - 1.6 parts of sodium dodecyl sulfate, 0.05 - 3.2 parts of potassium sodium tartrate, 0.5 - 2.4 parts of amino silane, 1 - 4.8 parts of polypropylene fiber, and 5 - 16 parts of sulfoaluminate expansive agent.

[0021] Preferably, it comprises raw materials in the following weight parts:

[0022] 20 - 40 parts of cement, 60 - 80 parts of fine sand, 20 - 40 parts of ceramic waste powder, 2 - 2.4 parts of water reducing agent, 1 - 8 parts of hydroxypropyl methyl cellulose ether, 0.1 - 1.6 parts of rosin soap, 0.05 - 3.2 parts of potassium sodium tartrate, 0.5 - 2.4 parts of amino silane, 1 - 4.8 parts of polypropylene fiber.

[0023] Preferably, it comprises raw materials in the following weight parts:

[0024] 20 - 40 parts of cement, 60 - 80 parts of fine sand, 20 - 40 parts of ceramic waste powder, 2 - 2.4 parts of water reducing agent, 1 - 8 parts of hydroxypropyl methyl cellulose ether, 0.1 - 1.6 parts of rosin soap, 0.05 - 3.2 parts of potassium sodium tartrate, 0.5 - 2.4 parts of amino silane, 1 - 4.8 parts of polypropylene fiber, and 5 - 16 parts of sulfoaluminate expansive agent.

[0025] Preferably, it comprises raw materials in the following weight parts:

[0026] 20 - 40 parts of cement, 60 - 80 parts of fine sand, 20 - 40 parts of ceramic waste powder, 2 - 2.4 parts of water reducing agent, 1 - 8 parts of hydroxypropyl methyl cellulose ether, 0.1 - 1.6 parts of sodium dodecyl sulfate, 0.05 - 3.2 parts of sodium gluconate, 0.5 - 2.4 parts of amino silane, 1 - 4.8 parts of polypropylene fiber.

[0027] Preferably, it comprises raw materials in the following weight parts:

[0028] 20 - 40 parts of cement, 60 - 80 parts of fine sand, 20 - 40 parts of ceramic waste powder, 2 - 2.4 parts of water reducing agent, 1 - 8 parts of hydroxypropyl methyl cellulose ether, 0.1 - 1.6 parts of sodium dodecyl sulfate, 0.05 - 3.2 parts of sodium gluconate, 0.5 - 2.4 parts of amino silane, 1 - 4.8 parts of polypropylene fiber, and 5 - 16 parts of sulfoaluminate expansive agent.

[0029] Preferably, it comprises raw materials in the following weight parts:

[0030] 20-40 parts of cement, 60-80 parts of fine sand, 20-40 parts of ceramic waste powder, 2-2.4 parts of water reducing agent, 1-8 parts of hydroxypropyl methyl cellulose ether, 0.1-1.6 parts of rosin soap, 0.05-3.2 parts of sodium gluconate, 0.5-2.4 parts of amino silane, 1-4.8 parts of polypropylene fiber.

[0031] Preferably, it comprises raw materials in the following parts by weight:

[0032] 20-40 parts of cement, 60-80 parts of fine sand, 20-40 parts of ceramic waste powder, 2-2.4 parts of water reducing agent, 1-8 parts of hydroxypropyl methyl cellulose ether, 0.1-1.6 parts of rosin soap, 0.05-3.2 parts of sodium gluconate, 0.5-2.4 parts of amino silane, 1-4.8 parts of polypropylene fiber and 5-16 parts of sulfoaluminate expansive agent.

[0033] The present invention also provides a preparation method of wet-mixed mortar with ceramic waste powder, which specifically comprises the following steps:

[0034] S100, pretreatment of ceramic waste powder: cleaning, crushing, and screening to obtain ceramic waste powder with a retained particle size ≤ 0.15 mm;

[0035] S200, dry mixing of proportion: weighing the raw materials in the above parts by weight and dry mixing them evenly to form a dry mixture;

[0036] S300, dissolution of additives: pre-dissolving the water reducing agent, hydroxypropyl methyl cellulose ether, retarder, and amino silane in water, with a water-cement ratio of 0.45 and a dissolution temperature range of 15-30 °C;

[0037] S400, wet mixing: gradually adding the additives dissolved in step S300 to the dry mixture, stirring during the addition process, with a stirring speed of 150-250 rpm, and finally adding an air-entraining agent containing a surfactant and continuing to stir evenly;

[0038] S500, fiber addition: adding polypropylene fiber simultaneously with step S400 to ensure uniform fiber distribution;

[0039] S600, consistency adjustment: adding water according to construction requirements to adjust the consistency of the mortar;

[0040] S700, stirring: controlling the stirring speed at 140-200 rpm and continuously stirring for 2-5 minutes.

[0041] Preferably, it specifically comprises the following steps:

[0042] S100, pretreatment of ceramic waste powder: cleaning, crushing, and screening to obtain ceramic waste powder with a retained particle size ≤ 0.15 mm;

[0043] S200, Proportioning and dry mixing: Weigh the raw materials in the stated weight portions and mix them dry and evenly to form a dry mix.

[0044] S300, Additive dissolution: Dissolve the water reducer, hydroxypropyl methylcellulose ether, retarder, and amino silane in water in advance. The water-cement ratio is 0.45, and the dissolution temperature range is 15 - 30°C. Add the sulfoaluminate-based expansive agent in the stated weight portions.

[0045] S400, Wet mixing: Gradually add the additives dissolved in step S300 to the dry mix, and stir during the addition process. The stirring speed is 150 - 250 rpm. Finally, add an air-entraining agent containing a surfactant and continue to stir evenly.

[0046] S500, Fiber addition: Add polypropylene fibers simultaneously with step S400 to ensure uniform fiber distribution.

[0047] S600, Consistency adjustment: Add water according to construction requirements to adjust the consistency of the mortar.

[0048] S700, Stirring: Control the stirring speed at 140 - 200 rpm and continue to stir for 2 - 5 minutes.

[0049] Preferably, in step S300, the retarder is any one of the stated weight portions of potassium sodium tartrate or sodium gluconate.

[0050] Preferably, in step S400, the air-entraining agent containing a surfactant is any one of the stated weight portions of sodium dodecyl sulfate and rosin soap.

[0051] Compared with the prior art, the present invention provides a wet-mixed mortar containing ceramic waste powder and its preparation method, which has the following beneficial effects:

[0052] For this wet-mixed mortar containing ceramic waste powder and its preparation method, the air-entraining agent containing a surfactant can introduce tiny closed air bubbles, which can reduce the density of the mortar, effectively improve the frost resistance and durability. The amino silane can reduce the permeability of the mortar and improve the impermeability performance. In this way, it can not only improve the toughness of the internal structure of the mortar and the ability to resist external attacks, but also further reduce the moisture migration, jointly improving the weather resistance and waterproof performance of the mortar.

[0053] In addition, since the sulfoaluminate-based expansive agent can generate a moderate volume expansion during the hardening process to offset the shrinkage of the mortar, and the anti-cracking fibers can form a three-dimensional grid structure in the mortar to limit the development of microcracks inside the mortar. When the two are used in combination, they can act together at the micro and macro levels to more effectively prevent and reduce the cracking of the mortar, thus greatly improving the crack resistance and durability of the mortar.

[0054] And, relatively, in combination Figure 1 As shown by the comparison with the performance parameters in the table, for the component comparison of each example and even Comparative Example 2 and Comparative Example 1, it can be clearly seen that while ensuring the mortar performance strength, the recycling rate of ceramic waste powder is improved, the environmental pollution problem caused by waste accumulation can be significantly reduced, which conforms to the concept of circular economy and sustainable development, helps to build an ecological city, and enhances the social responsibility and social image of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is a detailed comparison diagram of the implementation and comparative examples of a wet-mixed mortar with ceramic waste powder and its preparation method according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0056] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention.

[0057] Aiming at the deficiencies of the prior art, the present invention provides a wet-mixed mortar with ceramic waste powder, which comprises the following raw materials in parts by weight:

[0058] 20-40 parts of cement, 60-80 parts of fine sand, 20-40 parts of ceramic waste powder, 2-2.4 parts of water reducing agent, 1-8 parts of hydroxypropyl methyl cellulose ether, 0.1-1.6 parts of air-entraining agent containing surfactant, 0.05-3.2 parts of retarder, 0.5-2.4 parts of amino silane and 1-4.8 parts of polypropylene fiber.

[0059] It should be noted that the air-entraining agent containing surfactant is any one of sodium dodecyl sulfate or rosin soap, and the retarder is specifically any one of potassium sodium tartrate or sodium gluconate. In actual engineering applications, the specific ratio of the mortar needs to be determined according to the specific requirements of the project, construction conditions, raw material performance, and relevant national or regional standards:

[0060] Cement: Usually, the proportion is between 200 and 400 kg / m 3 ) (kg / m), and the specific dosage is determined according to the strength requirements of the mortar and the performance of the ceramic waste powder;

[0061] Fine sand: Usually, the proportion is between 600 and 800 kg / m 3 ) (kg / m), and together with cement, it constitutes the main aggregate part of the mortar;

[0062] Ceramic waste powder: As a partial replacement for fine aggregate, its dosage generally does not exceed 50% of fine sand, that is, approximately between 200 and 400 kilograms per cubic meter (kg / m 3 ), and the specific ratio needs to be adjusted according to the characteristics of the ceramic waste powder and the desired performance goals;

[0063] Water reducing agent: Usually added according to 0.2% - 1.5% of the cement quality, depending on the type of water reducing agent and the workability required for the mortar;

[0064] Hydroxypropyl methyl cellulose ether: The general addition amount is 0.1% - 0.5% of the mortar quality to ensure good water retention and workability of the mortar;

[0065] Air entraining agent containing surfactant: Introduce an appropriate amount of air as needed to improve frost resistance, and the general addition amount is 0.01% - 0.1% of the mortar quality;

[0066] Retarder: Adjusted according to construction conditions and required working time, and the general addition amount is 0.05% - 0.2 of the cement quality;

[0067] Aminosilane: Generally about 0.5% - 1.5% of the mortar quality;

[0068] Polypropylene fiber: As a crack-resistant fiber, it is usually added by volume ratio. For example, the volume ratio is 0.1% - 0.3%, and the specific quantity needs to be determined according to the fiber length, diameter, and mortar performance requirements;

[0069] Among them, polypropylene fiber can be equivalently replaced by glass fiber or polyester fiber.

[0070] Expansion agent: Used to compensate for the shrinkage of the mortar, and the addition amount is usually about 5% - 10% of the cement quality, but the specific ratio needs to be determined according to the shrinkage requirements of the mortar and the effectiveness of the expansion agent.

[0071] Specifically, a sulfoaluminate-based expansion agent for ceramic waste powder wet-mixed mortar, through the set sulfoaluminate-based expansion agent, will generate a large amount of ettringite crystals during the cement hydration process, having a large volume expansion property, which can compensate for the drying shrinkage and temperature shrinkage of the concrete. The following chemical reaction formula is used for illustration:

[0072] 3(CaO·Al2O3)+3(CaSO4·2H2O)+36H2O→3(CaO·Al2(SO4)3·32H2O).

[0073] The present invention also provides a preparation method for ceramic waste powder wet-mixed mortar, specifically including the following steps:

[0074] S100. Pretreatment of ceramic waste powder: Clean, crush, and screen to retain ceramic waste powder with a particle size ≤ 0.15 mm;

[0075] S200, Mixing in dry proportion: Weigh the raw materials in parts by weight and mix them evenly in dry state to form a dry mixture.

[0076] S300, Dissolving additives: Dissolve water-reducing agent, hydroxypropyl methyl cellulose ether, retarder and amino silane in water in advance, with a water-cement ratio of 0.45 and the dissolution temperature range being 15 - 30°C.

[0077] S400, Wet mixing: Gradually add the dissolved additives in step S300 to the dry mixture, and stir during the adding process at a stirring speed of 150 - 250 rpm. Finally, add an air-entraining agent containing surfactant and continue to stir evenly.

[0078] S500, Adding fibers: Add polypropylene fibers simultaneously with step S400 to ensure uniform fiber distribution.

[0079] S600, Adjusting consistency: Add water according to construction requirements to adjust the consistency of the mortar.

[0080] S700, Stirring: Control the stirring speed at 140 - 200 rpm and continue to stir for 2 - 5 minutes.

[0081] It should be noted that the present invention is a method for preparing wet-mixed mortar with ceramic waste powder. Between step S300 and step S400, add a thioaluminate-based expansive agent in parts by weight.

[0082] Among them, in step S300, the retarder is any one of potassium sodium tartrate or sodium gluconate in parts by weight. In step S400, the air-entraining agent containing surfactant is any one of sodium dodecyl sulfate and rosin soap in parts by weight.

[0083] It is worth mentioning that rosin soap can also form micelles in aqueous solution, introduce air by reducing surface tension to form microbubbles, which has the same effect as sodium dodecyl sulfate. However, compared with sodium dodecyl sulfate, as a natural derivative product, rosin soap may have higher environmental friendliness, less impact on the ecological environment and human health. Rosin soap can be refined from rosin resources, which is a utilization of renewable resources. Although sodium dodecyl sulfate has a wide source, its production process may involve petroleum products and its resource sustainability is relatively weak.

[0084] Moreover, rosin soap as an air-entraining agent can introduce closed small bubbles in the mortar, which can effectively improve the frost resistance and durability of the mortar. In addition, rosin soap has better compatibility with other additives such as cement and sand, and relatively reduces the possible adverse effects on the mortar performance.

[0085] It should be noted that for a kind of wet-mixed mortar with ceramic waste powder, when sodium dodecyl sulfate (SDS) is used as an air-entraining agent, its mechanism of action in water is represented by the following reaction formula:

[0086] SDS + H2O → SDS·H2O;

[0087] It mainly utilizes the reduction of the interfacial tension of the system by sodium dodecyl sulfate to promote air to enter the mortar and stably exist therein.

[0088] The retarder can complex with Ca 2+ ions generated in the initial stage of cement hydration, delay the speed of the hydration reaction and extend the working time of the mortar. The reaction of the retarder can be represented by the following reaction formula:

[0089] Ca 2+ + retarder → [Ca 2+ - retarder].

[0090] In addition, in this embodiment, amino silane is used as a waterproofing agent. Amino silane reacts with the hydroxyl groups in the cement hydration products to form stable chemical bonds, improving the waterproof performance of the mortar, which is represented by the following reaction formula:

[0091] RSiX3 + 3OH - → RSi(OH)3 + 3X - ;

[0092] Among them, RSiX3 represents amino silane, and X - represents a leaving group (such as Cl - ), and then the generated silanol groups further react with the cement hydration products to form strong bonding.

[0093] In this embodiment, polypropylene fibers can be equivalently replaced by polyester fibers, both of which are physically embedded. The fracture energy of the fibers is used to consume the energy for crack propagation, improving the crack resistance of the mortar.

[0094] When sodium gluconate is used as a retarder, sodium gluconate will react with calcium hydroxide to generate hydration products, delaying the hydration process of cement, which is specifically represented by the following reaction formula:

[0095] NaC6H 11 O7 + Ca(OH)2 → CaC6H 10 O7 + 2NaOH.

[0096] Using hydroxypropyl methyl cellulose ether in the mortar mainly plays a role in water retention and lubrication. The colloidal solution formed after dissolving in water can wrap a part of the water and delay the evaporation of water, effectively improving the workable time and open time of the mortar.

[0097] Based on the above, in order to conduct a synergistic experiment on the performance of mortar, several examples and comparative examples are proposed for comparison, as Figure 1 shown, where:

[0098] Example 1

[0099] It includes raw materials in the following parts by weight:

[0100] 20 parts of cement, 60 parts of fine sand, 20 parts of ceramic waste powder, 2 parts of water reducing agent, 1 part of hydroxypropyl methyl cellulose ether, 0.1 part of air entraining agent containing surfactant, 0.05 part of retarder, 0.5 part of amino silane, 1 part of polypropylene fiber.

[0101] Example 2

[0102] It includes raw materials in the following parts by weight:

[0103] 40 parts of cement, 80 parts of fine sand, 40 parts of ceramic waste powder, 2.4 parts of water reducing agent, 8 parts of hydroxypropyl methyl cellulose ether, 1.6 parts of air entraining agent containing surfactant, 3.2 parts of retarder, 2.4 parts of amino silane, 4.8 parts of polypropylene fiber.

[0104] Example 3

[0105] It includes raw materials in the following parts by weight:

[0106] 32 parts of cement, 67 parts of fine sand, 29 parts of ceramic waste powder, 2.3 parts of water reducing agent, 3 parts of hydroxypropyl methyl cellulose ether, 0.8 part of air entraining agent containing surfactant, 1.7 parts of retarder, 1.3 parts of amino silane, 2.3 parts of polypropylene fiber.

[0107] Example 4

[0108] It includes raw materials in the following parts by weight:

[0109] 20 parts of cement, 60 parts of fine sand, 20 parts of ceramic waste powder, 2 parts of water reducing agent, 1 part of hydroxypropyl methyl cellulose ether, 0.1 part of air entraining agent containing surfactant, 0.05 part of retarder, 0.5 part of amino silane, 1 part of polypropylene fiber, 5 parts of sulfoaluminate type expansive agent.

[0110] Example 5

[0111] It includes raw materials in the following parts by weight:

[0112] 40 parts of cement, 80 parts of fine sand, 40 parts of ceramic waste powder, 2.4 parts of water reducing agent, 8 parts of hydroxypropyl methyl cellulose ether, 1.6 parts of air entraining agent containing surfactant, 3.2 parts of retarder, 2.4 parts of amino silane, 4.8 parts of polypropylene fiber, 16 parts of sulfoaluminate type expansive agent.

[0113] Example 6

[0114] It includes raw materials in the following parts by weight:

[0115] 32 parts of cement, 67 parts of fine sand, 29 parts of ceramic waste powder, 2.3 parts of water reducer, 3 parts of hydroxypropyl methyl cellulose ether, 0.8 part of air-entraining agent containing surfactant, 1.7 parts of retarder, 1.3 parts of amino silane, 2.3 parts of polypropylene fiber and 9 parts of sulfoaluminate-based expansive agent.

[0116] Example Seven

[0117] It includes raw materials in the following parts by weight:

[0118] 20 parts of cement, 60 parts of fine sand, 20 parts of ceramic waste powder, 2 parts of water reducer, 1 part of hydroxypropyl methyl cellulose ether, 0.1 part of rosin soap, 0.05 part of sodium gluconate, 0.5 part of amino silane and 1 part of polypropylene fiber.

[0119] Example Eight

[0120] It includes raw materials in the following parts by weight:

[0121] 20 parts of cement, 60 parts of fine sand, 20 parts of ceramic waste powder, 2 parts of water reducer, 1 part of hydroxypropyl methyl cellulose ether, 0.1 part of rosin soap, 0.05 part of sodium gluconate, 0.5 part of amino silane, 1 part of polypropylene fiber and 5 parts of sulfoaluminate-based expansive agent.

[0122] Example Nine

[0123] It includes raw materials in the following parts by weight:

[0124] 20 parts of cement, 60 parts of fine sand, 20 parts of ceramic waste powder, 2 parts of water reducer, 1 part of hydroxypropyl methyl cellulose ether, 0.1 part of sodium dodecyl sulfate, 0.05 part of sodium gluconate, 0.5 part of amino silane and 1 part of polypropylene fiber.

[0125] Example Ten

[0126] It includes raw materials in the following parts by weight:

[0127] 20 parts of cement, 60 parts of fine sand, 20 parts of ceramic waste powder, 2 parts of water reducer, 1 part of hydroxypropyl methyl cellulose ether, 0.1 part of sodium dodecyl sulfate, 0.05 part of sodium gluconate, 0.5 part of amino silane, 1 part of polypropylene fiber and 5 parts of sulfoaluminate-based expansive agent.

[0128] Example Eleven

[0129] It includes raw materials in the following parts by weight:

[0130] 20 parts of cement, 60 parts of fine sand, 20 parts of ceramic waste powder, 2 parts of water reducing agent, 1 part of hydroxypropyl methyl cellulose ether, 0.1 part of rosin soap, 0.05 part of potassium sodium tartrate, 0.5 part of amino silane and 1 part of polypropylene fiber.

[0131] Example 12

[0132] It includes raw materials in the following weight parts:

[0133] 20 parts of cement, 60 parts of fine sand, 20 parts of ceramic waste powder, 2 parts of water reducing agent, 1 part of hydroxypropyl methyl cellulose ether, 0.1 part of rosin soap, 0.05 part of potassium sodium tartrate, 0.5 part of amino silane, 1 part of polypropylene fiber and 5 parts of sulfoaluminate expansive agent.

[0134] Example 13

[0135] It includes raw materials in the following weight parts:

[0136] 20 parts of cement, 60 parts of fine sand, 20 parts of ceramic waste powder, 2 parts of water reducing agent, 1 part of hydroxypropyl methyl cellulose ether, 0.1 part of sodium dodecyl sulfate, 0.05 part of potassium sodium tartrate, 0.5 part of amino silane and 1 part of polypropylene fiber.

[0137] Example 14

[0138] It includes raw materials in the following weight parts:

[0139] 20 parts of cement, 60 parts of fine sand, 20 parts of ceramic waste powder, 2 parts of water reducing agent, 1 part of hydroxypropyl methyl cellulose ether, 0.1 part of sodium dodecyl sulfate, 0.05 part of potassium sodium tartrate, 0.5 part of amino silane, 1 part of polypropylene fiber and 5 parts of sulfoaluminate expansive agent.

[0140] In addition, as Figure 1 shown, there are also Comparative Example 1 and Comparative Example 2. Comparative Example 1 is a mortar prepared by using ceramic waste powder, which is more common in the prior art:

[0141] Comparative Example 1

[0142] It includes raw materials in the following weight parts:

[0143] 40 parts of cement, 36 parts of fly ash, 12 parts of modified ceramic fertilizer, 42 parts of quicklime powder, 10 parts of anhydrite powder and 2 parts of aluminum powder.

[0144] Comparative Example 2

[0145] It includes raw materials in the following weight parts:

[0146] 20 parts of cement, 60 parts of fine sand, 20 parts of ceramic waste powder, 2 parts of water reducing agent, 1 part of hydroxypropyl methyl cellulose ether, 0.1 part of sodium dodecyl sulfate, 0.05 part of potassium sodium tartrate and 1 part of polypropylene fiber.

[0147] The preparation methods of the above Examples 1 to 14 all refer to the above. Among them, in Comparative Example 2, the amino silane was removed, and the preparation method of Comparative Example 1 refers to the prior art, so it will not be elaborated here.

[0148] Based on the above examples and comparative examples, in accordance with national testing standards such as GB / T3183-2003, GB50204~2015, JGJ / T70-2009, GB / T 41060-2021, etc., the performance of the mortar prepared in the above examples and comparative examples was tested, including the compressive strength, water retention, impermeability, frost resistance and crack resistance of the mortar at the age of 28 days. Among them, the water retention is reflected by the water retention rate, the impermeability is reflected by the water absorption rate of the mortar, the frost resistance specifically includes the strength loss rate and weight loss rate under the freeze-thaw environment within 28 days, and the crack resistance is reflected by the bonding strength. The test results are shown in the following table:

[0149]

[0150]

[0151] From the above test results, it can be seen that the compressive strength, water retention, impermeability, frost resistance and crack resistance of the above examples are significantly higher than those of Comparative Example 1 and Comparative Example 2. And the above performance strengths of Comparative Example 1 are all higher than those of Comparative Example 1. Among them, the performance strength of Comparative Example 2 is lower than that of the above examples. Considering that the removal of the amino silane component has an impact on the performance of the mortar prepared with the above parts by weight;

[0152] In addition, the compressive strengths of Examples 4 to 6, 8, 10, 12 and 14 are all higher than those of other examples and comparative examples, and the bonding strengths of the crack resistance tests of Examples 4 to 6, 8, 10, 12 and 14 are all greater than 2 Mpa.

[0153] And, relatively speaking, by comparing the components of each example and even Comparative Example 2 and Comparative Example 1, it can be clearly seen that while ensuring the mortar performance strength, the recycling rate of ceramic waste powder is improved, and the environmental pollution problems caused by waste accumulation can be significantly reduced, which conforms to the concept of circular economy and sustainable development, helps to build an ecological city, and enhances the social responsibility and social image of the enterprise.

[0154] From the above, it can be seen that the air-entraining agent containing a surfactant can introduce tiny closed bubbles, can reduce the density of the mortar, and can effectively improve the frost resistance and durability. And the amino silane can reduce the permeability of the mortar and improve the impermeability performance. In this way, not only can the toughness of the internal structure of the mortar and the ability to resist external attacks be improved, but also the water migration can be further reduced, jointly improving the weather resistance and waterproof performance of the mortar;

[0155] In addition, since sulfoaluminate-based expansive agents can generate appropriate volume expansion during the hardening process to offset the shrinkage of the mortar, while anti-cracking fibers can form a three-dimensional grid structure in the mortar to limit the development of microcracks inside the mortar, when the two are used in combination, they can act together at both the micro and macro levels to more effectively prevent and reduce the cracking of the mortar, thereby greatly enhancing the crack resistance and durability of the mortar.

[0156] The above has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A wet-mixed mortar made of ceramic waste powder, characterized in that, It includes raw materials in the following parts by weight: 20 - 40 parts of cement, 60 - 80 parts of fine sand, 20 - 40 parts of ceramic waste powder, 2 - 2.4 parts of water reducer, 1 - 8 parts of hydroxypropyl methyl cellulose ether, 0.1 - 1.6 parts of air-entraining agent containing surfactant, 0.05 - 3.2 parts of retarder, 0.5 - 2.4 parts of amino silane, and 1 - 4.8 parts of polypropylene fiber.

2. A wet-mixed mortar made of ceramic waste powder according to claim 1, characterized in that: It also includes 5 - 16 parts of sulfoaluminate-based expansive agent.

3. A wet-mixed mortar made from ceramic waste powder according to claim 1 or 2, characterized in that: The air-entraining agent containing surfactant is any one of sodium dodecyl sulfate or rosin soap.

4. A wet-mixed mortar made from ceramic waste powder according to claim 3, characterized in that: The retarder is specifically any one of potassium sodium tartrate or sodium gluconate.

5. A preparation method for a wet-mixed mortar of ceramic waste powder according to any one of claims 1 to 4, characterized in that, Specifically, it includes the following steps: S100, Pretreatment of ceramic waste powder: Wash, crush, and screen to obtain ceramic waste powder with a retained particle size ≤ 0.15 mm; S200, Dry mixing of proportion: Weigh the raw materials in the above parts by weight and mix them evenly to form a dry mixture; S300, Dissolution of additives: Dissolve the water reducer, hydroxypropyl methyl cellulose ether, retarder, and amino silane in water in advance. The water-cement ratio is 0.45, and the dissolution temperature range is 15 - 30 °C; S400, Wet mixing: Gradually add the additives dissolved in step S300 to the dry mixture, stir during the addition process, the stirring speed is 150 - 250 rpm, and finally add the air-entraining agent containing surfactant and continue to stir evenly; S500, Fiber addition: Add polypropylene fiber while performing step S400 to ensure uniform fiber distribution; S600, Consistency adjustment: Add water according to construction requirements to adjust the consistency of the mortar; S700, Stirring: Control the stirring speed at 140 - 200 rpm and continue to stir for 2 - 5 min.

6. The preparation method of a wet-mixed mortar from ceramic waste powder according to claim 5, characterized in that: Between step S300 and step S400, add the sulfoaluminate-based expansive agent in the above parts by weight.

7. The preparation method of a wet-mixed mortar with ceramic waste powder according to claim 6, characterized in that: In step S300, the retarder is any one of potassium sodium tartrate or sodium gluconate in the above parts by weight.

8. The preparation method of a wet-mixed mortar with ceramic waste powder according to claim 5, characterized in that: In step S400, the air-entraining agent containing surfactant is any one of sodium dodecyl sulfate and rosin soap in the above parts by weight.

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