A concrete grout and a method of making the same

Abstract

The present application relates to a kind of concrete grout and its preparation method, the concrete grout includes the following mass parts of raw materials: cement 40 parts;60ˉ80 parts of gravel;Fly ash 20ˉ25 parts;Quartz sand 20ˉ30 parts;Recycled fiber cloth fragments 10ˉ15 parts;Mixed water reducing agent 2ˉ3 parts;Wherein, the recycled fiber cloth fragments are the fragments of the cloth of at least one fiber of dacron, chinlon, acrylic, chlorofiber, viscose fiber;The mixed water reducing agent is the mixture of polycarboxylate superplasticizer and lignosulfonate water reducing agent, and the mass ratio of polycarboxylate superplasticizer and lignosulfonate water reducing agent is 1: (0.2ˉ0.3).The concrete grout can improve the weather resistance of concrete.

Description

Technical Field

[0001] This invention relates to the field of concrete, and more specifically to a concrete grouting material and its preparation method. Background Technology

[0002] Concrete, as an important civil engineering material, is typically made by mixing cement and other binding materials, mineral aggregates, and water, allowing it to solidify and bind together to form a monolithic composite material. Concrete generally possesses advantages such as high hardness and high strength, and is widely used in various engineering applications including buildings, roads, bridges, tunnels, dams, ports, and airports. However, with alternating temperature changes in the application environment, especially in extreme temperature environments, ordinary concrete materials are prone to thermal stress, leading to structural damage, reduced weather resistance, and potential safety hazards. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the first objective of the present invention is to provide a concrete grouting material that can improve the weather resistance of concrete.

[0004] The second objective of this invention is to provide a method for preparing the concrete grout, which has the advantages of simple steps.

[0005] To achieve the objective of this invention, a concrete grouting material is provided, comprising the following raw materials in parts by weight: 40 parts cement; 60-80 parts crushed stone; 20-25 parts fly ash; 20-30 parts quartz sand; 10-15 parts recycled fiber cloth fragments; and 2-3 parts mixed water-reducing agent. The recycled fiber cloth fragments are fragments of fabric composed of at least one fiber selected from polyester, nylon, acrylic, chlorofiber, and viscose fiber. The mixed water-reducing agent is a mixture of polycarboxylate-based water-reducing agent and lignin sulfonate-based water-reducing agent, wherein the mass ratio of the polycarboxylate-based water-reducing agent to the lignin sulfonate-based water-reducing agent is 1:(0.2-0.3).

[0006] In some embodiments of the present invention, the concrete grouting material comprises the following raw materials in parts by weight: 40 parts cement; 70-80 parts crushed stone; 23-25 ​​parts fly ash; 20-23 parts quartz sand; 13-15 parts recycled fiber cloth fragments; and 2-3 parts mixed water-reducing agent.

[0007] In some embodiments of the present invention, the average particle size of the crushed stone is 5-20 mm.

[0008] In some embodiments of the present invention, the average particle size of the fly ash is 0.15-0.3 mm.

[0009] In some embodiments of the present invention, the average particle size of the quartz sand is 0.5-1 mm.

[0010] In some embodiments of the present invention, the average diameter of the sheet-like plane of the recycled fiber cloth fragments is 2-3 mm.

[0011] In some embodiments of the present invention, the cement is PO42.5 type silicate cement.

[0012] In some embodiments of the present invention, the crushed stone is granite crushed stone.

[0013] In some embodiments of the present invention, the recycled fiber cloth fragments are nonwoven or woven fabrics made of at least one of polyester, nylon, acrylic, chlorofiber, and viscose fiber, which are then shredded by a cloth shredder.

[0014] In some embodiments of the present invention, the polycarboxylate superplasticizer is selected from type DH-4005.

[0015] In some embodiments of the present invention, the lignin sulfonate water-reducing agent is selected from at least one of calcium lignin sulfonate, sodium lignin sulfonate, and magnesium lignin sulfonate.

[0016] In some embodiments of the present invention, the concrete grout further includes the following raw materials in parts by weight: 0.5-2 parts of additives; the additives are selected from at least one of defoamers, dispersants, and expanding agents.

[0017] To achieve the second objective of the present invention, the present invention provides a method for preparing concrete grouting material according to any of the above-mentioned embodiments, characterized by comprising the following steps: mixing the cement, the crushed stone, the fly ash, the quartz sand, the recycled fiber cloth fragments and the mixed water-reducing agent evenly.

[0018] In some embodiments of the present invention, the recycled fiber cloth fragments are dried before mixing.

[0019] In some embodiments of the present invention, the mixing step specifically includes: sequentially adding the crushed stone, the recycled fiber cloth fragments, the quartz sand, the fly ash, the cement, and the mixed water-reducing agent to a started mixer for mixing.

[0020] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0021] The concrete grout of this invention further incorporates recycled fiber cloth fragments as filler in a grouting system composed of cementitious binders, coarse aggregates, and fine aggregates. The intertwined fibers in the recycled fiber cloth fragments allow for relative movement and tension variation when the concrete is applied to varying ambient temperatures, thus absorbing stress caused by temperature changes and preventing cracking. Furthermore, the recycled fiber cloth fragments also provide reinforcement, preventing a reduction in the strength and hardness of the concrete. In addition, the recycled fiber cloth fragments are made from recycled fibers, offering advantages such as low raw material cost and environmental friendliness. This invention also utilizes a water-reducing agent composed of polycarboxylate-based and lignin sulfonate-based water-reducing agents to achieve better water-reducing effects and promote the dispersion of the recycled fiber cloth fragments in the concrete, thereby improving the concrete's weather resistance. Detailed Implementation

[0022] This invention provides a concrete grouting material that, when used in construction, can be mixed with water and then laid into molds or other shaped structures to obtain concrete material, which can be used for various purposes such as construction. In this embodiment, the concrete grouting material comprises the following raw materials in parts by weight: 40 parts cement; 60-80 parts crushed stone; 20-25 parts fly ash; 20-30 parts quartz sand; 10-15 parts recycled fiber cloth fragments; and 2-3 parts mixed water-reducing agent.

[0023] Cement serves as the binder in the grouting material. The cement can be conventional silicate cement. When cement is mixed with water, the inorganic molecules in the cement hydrate and further harden, forming an inorganic gel structure. This gel structure can bind aggregates and fillers such as crushed stone, fly ash, quartz sand, and recycled fiber cloth fragments together, forming a solid material with high strength and hardness. In this embodiment, the cement mass fraction is 40 parts, and the amount of other raw materials is further limited based on this cement mass fraction. It should be understood that the above mass fractions only reflect the mass ratio between the raw materials. The mass fractions can be multiplied by a specific coefficient according to actual needs to obtain the specific actual mass fraction of the raw materials used.

[0024] Crushed stone, fly ash, and quartz sand are used as coarse or fine aggregates. For example, crushed stone is coarse aggregate, while fly ash and quartz sand are fine aggregates. The average particle size of the coarse aggregate can be greater than 5 mm, while the particle size of the fine aggregate can be less than 5 mm. Coarse and fine aggregates work together to act as reinforcing fillers in the cement gel after construction and curing, serving as the concrete skeleton. By matching the dosage and particle size of coarse and fine aggregates, the fine aggregate can fill the gaps between the coarse aggregates, thus better increasing the strength and hardness of the concrete. In this embodiment, the mass fraction of crushed stone is 60-80 parts, for example, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80 parts, etc.; the mass fraction of fly ash is 20-25 parts, for example, 20, 21, 22, 23, 24, 25 parts, etc.; the mass fraction of quartz sand is 20-30 parts, for example, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 parts, etc.

[0025] Recycled fiber cloth fragments serve as both a weather-resistant modifier and a concrete reinforcing agent. These fragments disperse within the cement gel structure, contacting cement, coarse aggregate, or fine aggregate. When concrete experiences temperature stress due to changes in ambient temperature, the fibers in the recycled fiber cloth fragments can move and vary in tightness, absorbing stress and preventing cracking. Simultaneously, the fibers do not deform excessively, and the inclusion of recycled fiber cloth fragments in the concrete structure does not reduce its strength, such as compressive strength or hardness. In this embodiment, the recycled fiber cloth fragments are fragments of fabric composed of at least one of polyester, nylon, acrylic, chlorofiber, and viscose fibers. Polyester, nylon, acrylic, chlorofiber, and viscose fibers are all polar fibers, exhibiting strong interaction forces with the cement gel structure. This facilitates the dispersion of the recycled fiber cloth fragments and enhances the force transfer between them under stress, enabling the fragments to absorb and alleviate stress. The recycled fiber cloth fragments can be prepared using recycled fabric, making the raw materials readily available, low-cost, and requiring minimal cleanliness. In this embodiment, the mass fraction of the recycled fiber cloth fragments is 10-15 parts, such as 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, etc.

[0026] The mixed water-reducing agent serves to reduce water content and disperse the water, thereby reducing the amount of mixing water required for concrete and improving the dispersibility and flowability of the mixture. In this embodiment, the mixed water-reducing agent is a mixture of polycarboxylate-based water-reducing agent and lignin sulfonate-based water-reducing agent, with a mass ratio of 1:(0.2-0.3). Both polycarboxylate-based and lignin sulfonate-based water-reducing agents are anionic polymers, with polycarboxylate-based water-reducing agents exhibiting better water-reducing effects. In the grouting material system containing recycled fiber cloth fragments in this embodiment, the addition of lignin sulfonate-based water-reducing agent and polycarboxylate-based water-reducing agent allows the lignin sulfonate-based water-reducing agent to coat the outside of the recycled fiber cloth fragments, better dispersing them. Simultaneously, due to the steric hindrance of the mixed water-reducing agent, there are some gaps between the fiber filaments of the recycled fiber cloth fragments, preventing them from being completely filled by cement gel. This facilitates the movement of the fiber filaments, thereby improving the weather resistance of the concrete without reducing the water-reducing effect. In this embodiment, the mass fraction of the mixed water-reducing agent is 2-3 parts, such as 2 parts, 2.5 parts, 3 parts, etc.

[0027] In some examples, the concrete grout comprises the following raw materials in parts by weight: 40 parts cement; 70-80 parts crushed stone; 23-25 ​​parts fly ash; 20-23 parts quartz sand; 13-15 parts recycled fiber cloth fragments; and 2-3 parts mixed water-reducing agent. When the amounts of each component are within the above ranges, the strength and weather resistance of the cement can be further improved.

[0028] In some examples, the average particle size of the crushed stone is 5-20 mm, for example, it can be in the range of 5-10 mm, 10-15 mm, 15-20 mm, etc. As coarse aggregate, crushed stone can play a good skeletal role.

[0029] In some examples, the average particle size of fly ash is 0.15-0.3 mm, for example, it can be in the range of 0.15-0.2 mm, 0.2-0.25 mm, 0.25-0.3 mm, etc. As a fine aggregate, fly ash can fill the gaps between coarse aggregates, improving the hardness and strength of cement.

[0030] In some examples, the average particle size of the quartz sand is 0.5-1 mm, for example, in the ranges of 0.5-0.6 mm, 0.6-0.7 mm, 0.7-0.8 mm, 0.8-0.9 mm, 0.9-1 mm, etc. As a fine aggregate, quartz sand can fill the gaps between coarse aggregates, improving the hardness and strength of cement.

[0031] In some examples, the average diameter of the sheet-like plane of the recycled fiber cloth fragments is 2-3 mm, for example, within the range of 2-2.5 mm or 2.5-3 mm. This allows the recycled fiber cloth fragments to be evenly dispersed and distributed among the aggregates, thereby better buffering stress. The recycled fiber cloth fragments are cut from sheet-like fabric, and the resulting sheet-like fabric fragments have the sheet-like plane that originally served as the surface of the fabric. The sheet-like plane can be substantially circular or irregularly shaped, and the average diameter of the sheet-like plane can refer to the diameter of the circumscribed circle of the sheet-like plane. This embodiment does not limit the thickness of the recycled fiber cloth fragments, i.e., the dimension perpendicular to the sheet-like plane; the thickness can be, for example, 0.1-2 mm.

[0032] In some examples, the cement is PO42.5 type silicate cement. The raw materials for PO42.5 type silicate cement are readily available and can meet the general needs of concrete.

[0033] In some examples, the crushed stone is granite crushed stone, which has the advantages of high hardness, good particle shape and high chemical stability.

[0034] In some examples, the recycled fiber fabric fragments are obtained by shredding nonwoven or woven fabrics made of at least one of polyester, nylon, acrylic, chlorofiber, or viscose fibers using a fabric shredder. In nonwoven fabrics, the fiber threads are bonded together by means of melt bonding or other methods; in woven fabrics, the fiber threads are interwoven in warp and weft. When the recycled fiber nonwoven or woven fabric is shredded by a fabric shredder to obtain fragments of several millimeters, the fiber threads are subjected to the pulling force of the shredder blades, which increases the distance between the fiber threads. Preferably, pores are formed between the fiber threads in the shredded recycled fiber fabric fragments, and the pore diameter can be between 0.1 and 0.5 mm.

[0035] In some examples, polycarboxylate superplasticizers are selected from type DH-4005, which has readily available raw materials and good water-reducing effect.

[0036] In some examples, lignin sulfonate water-reducing agents are selected from at least one of calcium lignin sulfonate, sodium lignin sulfonate, and magnesium lignin sulfonate. The raw materials are readily available and have good water-reducing effects.

[0037] In some examples, the concrete grout also includes 0.5-2 parts by weight of the following raw material additives, such as 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, and 2 parts by weight. The additives can be selected from at least one of defoamers, dispersants, and expanding agents. Defoamers eliminate air bubbles generated when the grout is mixed with water; dispersants further improve the dispersibility of the raw materials; and expanding agents reduce shrinkage during concrete curing and allow the concrete to expand and fill specific construction spaces. In some examples, the concrete grout consists only of cement, crushed stone, fly ash, quartz sand, recycled fiber cloth fragments, a mixed water-reducing agent, and additives.

[0038] In other examples, the concrete grout may be free of additives. In some examples, the concrete grout consists only of cement, crushed stone, fly ash, quartz sand, recycled fiber cloth fragments, and a mixed water-reducing agent.

[0039] In some examples, the above-mentioned method for preparing concrete grout includes the following steps: mixing the cement, the crushed stone, the fly ash, the quartz sand, the recycled fiber cloth fragments and the mixed water-reducing agent evenly to obtain concrete grout. The preparation method is simple and the production cost is low.

[0040] In some examples, the recycled fiber cloth fragments are dried before mixing to ensure that the water content in the recycled fiber cloth is less than 0.5%, thus preventing the cement from hardening prematurely on the recycled fiber cloth fragments due to moisture.

[0041] In some examples, the mixing step specifically includes: adding the crushed stone, the recycled fiber cloth fragments, the quartz sand, the fly ash, the cement, and the mixed water-reducing agent to a started mixer in sequence for mixing. Adjusting the order of adding materials according to their particle size and properties can better promote the dispersion of each material.

[0042] The present application will be further described in detail below through specific embodiments. It should be understood that the scope of protection of the present invention should not be limited to the following specific embodiments. In the following embodiments, the types of cement, crushed stone, fly ash, and quartz sand used are the same. The cement is PO42.5 type silicate cement, the crushed stone is granite crushed stone with an average particle size in the range of 5-10 mm, the fly ash is fly ash with an average particle size in the range of 0.15-0.2 mm, and the quartz sand is quartz sand with an average particle size in the range of 0.8-1 mm. In the following embodiments, the preparation method of concrete grout is as follows: the recycled fiber cloth fragments are dried so that the water content in the recycled fiber cloth is less than 0.5%; the crushed stone, recycled fiber cloth fragments, quartz sand, fly ash, cement, and mixed water-reducing agent are added to the started mixer in sequence and stirred to obtain concrete grout.

[0043] Example 1

[0044] The concrete grouting material in this embodiment is composed of the following raw materials in parts by weight:

[0045] 40 parts cement;

[0046] 70 portions of crushed stone;

[0047] 25 parts fly ash;

[0048] 20 parts of quartz sand;

[0049] Thirteen pieces of recycled fiber cloth were recovered.

[0050] Mix 2 parts of water-reducing agent;

[0051] Among them, the recycled fiber cloth fragments are the crushed products of recycled polyester nonwoven fabric. The average diameter of the sheet-like plane of the recycled fiber cloth fragments is between 2-2.5 mm, and the average pore diameter is between 0.2-0.3 mm.

[0052] The mixed water-reducing agent is a mixture of DH-4005 type polycarboxylate water-reducing agent and calcium lignosulfonate, with a mass ratio of 1:0.2.

[0053] Mix the above-mentioned concrete grout with 20 parts of water to prepare concrete.

[0054] Example 2

[0055] The concrete grouting material in this embodiment is composed of the following raw materials in parts by weight:

[0056] 40 parts cement;

[0057] 80 portions of crushed stone;

[0058] 23 parts fly ash;

[0059] 23 parts of quartz sand;

[0060] 15 pieces of recycled fiber cloth fragments;

[0061] Mix 3 parts of water-reducing agent;

[0062] Among them, the recycled fiber cloth fragments are the crushed products of recycled nylon woven fabric. The average diameter of the sheet-like plane of the recycled fiber cloth fragments is between 2-2.5 mm, and the average pore diameter is between 0.1-0.2 mm.

[0063] The mixed water-reducing agent is a mixture of DH-4005 type polycarboxylate water-reducing agent and sodium lignosulfonate, with a mass ratio of 1:0.3.

[0064] Mix the above-mentioned concrete grout with 18 parts of water to prepare concrete.

[0065] Example 3

[0066] The concrete grouting material in this embodiment is composed of the following raw materials in parts by weight:

[0067] 40 parts cement;

[0068] 60 portions of crushed stone;

[0069] 20 parts fly ash;

[0070] 30 parts of quartz sand;

[0071] Ten pieces of recycled fiber cloth fragments were collected.

[0072] Mix 2 parts of water-reducing agent;

[0073] Among them, the recycled fiber cloth fragments are the crushed products of recycled acrylic woven fabric. The average diameter of the sheet-like plane of the recycled fiber cloth fragments is between 2 and 2.5 mm, and the average pore diameter is between 0.1 and 0.2 mm.

[0074] The mixed water-reducing agent is a mixture of DH-4005 type polycarboxylate water-reducing agent and sodium lignosulfonate, with a mass ratio of 1:0.25.

[0075] Mix the above-mentioned concrete grout with 20 parts of water to prepare concrete.

[0076] Example 4

[0077] The concrete grouting material in this embodiment is composed of the following raw materials in parts by weight:

[0078] 40 parts cement;

[0079] 75 portions of gravel;

[0080] 25 parts fly ash;

[0081] 20 parts of quartz sand;

[0082] Thirteen pieces of recycled fiber cloth were recovered.

[0083] Mix 3 parts of water-reducing agent;

[0084] Among them, the recycled fiber cloth fragments are the crushed products of recycled viscose fiber woven fabric. The average diameter of the sheet-like plane of the recycled fiber cloth fragments is between 2.5-3 mm, and the average pore diameter is between 0.2-0.3 mm.

[0085] The mixed water-reducing agent is a mixture of DH-4005 type polycarboxylate water-reducing agent and magnesium lignosulfonate, with a mass ratio of 1:0.2.

[0086] Mix the above-mentioned concrete grout with 18 parts of water to prepare concrete.

[0087] Example 5

[0088] The concrete grouting material in this embodiment is composed of the following raw materials in parts by weight:

[0089] 40 parts cement;

[0090] 65 portions of crushed stone;

[0091] 25 parts fly ash;

[0092] 30 parts of quartz sand;

[0093] Ten pieces of recycled fiber cloth fragments were collected.

[0094] Mix 2 parts of water-reducing agent;

[0095] Among them, the recycled fiber cloth fragments are the crushed products of recycled nylon woven fabric. The average diameter of the sheet-like plane of the recycled fiber cloth fragments is between 2 and 2.5 mm, and the average pore diameter is between 0.2 and 0.3 mm.

[0096] The mixed water-reducing agent is a mixture of DH-4005 type polycarboxylate water-reducing agent and sodium lignosulfonate, with a mass ratio of 1:0.2.

[0097] Mix the above-mentioned concrete grout with 20 parts of water to prepare concrete.

[0098] Example 6

[0099] The concrete grouting material in this embodiment is composed of the following raw materials in parts by weight:

[0100] 40 parts cement;

[0101] 70 portions of crushed stone;

[0102] 25 parts fly ash;

[0103] 20 parts of quartz sand;

[0104] Thirteen pieces of recycled fiber cloth were recovered.

[0105] Mix 2 parts of water-reducing agent;

[0106] Among them, the recycled fiber cloth fragments are the crushed products of recycled polyester nonwoven fabric. The average diameter of the sheet-like plane of the recycled fiber cloth fragments is between 2-2.5 mm, and the average pore diameter is between 0.2-0.3 mm.

[0107] The mixed water-reducing agent is a mixture of DH-4005 type polycarboxylate water-reducing agent and calcium lignosulfonate, with a mass ratio of 1:0.5.

[0108] Mix the above-mentioned concrete grout with 20 parts of water to prepare concrete.

[0109] Example 7

[0110] The concrete grouting material in this embodiment is composed of the following raw materials in parts by weight:

[0111] 40 parts cement;

[0112] 70 portions of crushed stone;

[0113] 25 parts fly ash;

[0114] 20 parts of quartz sand;

[0115] Thirteen pieces of recycled fiber cloth were recovered.

[0116] 2 parts water-reducing agent;

[0117] Among them, the recycled fiber cloth fragments are the crushed products of recycled polyester nonwoven fabric. The average diameter of the sheet-like plane of the recycled fiber cloth fragments is between 2-2.5 mm, and the average pore diameter is between 0.2-0.3 mm.

[0118] The water-reducing agent is DH-4005 type polycarboxylate water-reducing agent.

[0119] Mix the above-mentioned concrete grout with 20 parts of water to prepare concrete.

[0120] Example 8

[0121] The concrete grouting material in this embodiment is composed of the following raw materials in parts by weight:

[0122] 40 parts cement;

[0123] 70 portions of crushed stone;

[0124] 25 parts fly ash;

[0125] 20 parts of quartz sand;

[0126] Thirteen pieces of recycled fiber cloth were recovered.

[0127] Mix 2 parts of water-reducing agent;

[0128] Among them, the recycled fiber cloth fragments are the crushed products of recycled polyester nonwoven fabric. The average diameter of the sheet-like plane of the recycled fiber cloth fragments is between 5-6 mm, and the average pore diameter is between 0.1-0.3 mm.

[0129] The mixed water-reducing agent is a mixture of DH-4005 type polycarboxylate water-reducing agent and calcium lignosulfonate, with a mass ratio of 1:0.2.

[0130] Mix the above-mentioned concrete grout with 20 parts of water to prepare concrete.

[0131] Example 9

[0132] The concrete grouting material in this embodiment is composed of the following raw materials in parts by weight:

[0133] 40 parts cement;

[0134] 70 portions of crushed stone;

[0135] 25 parts fly ash;

[0136] 20 parts of quartz sand;

[0137] Five pieces of recycled fiber cloth fragments were collected.

[0138] Mix 2 parts of water-reducing agent;

[0139] Among them, the recycled fiber cloth fragments are the crushed products of recycled polyester nonwoven fabric. The average diameter of the sheet-like plane of the recycled fiber cloth fragments is between 2-2.5 mm, and the average pore diameter is between 0.2-0.3 mm.

[0140] The mixed water-reducing agent is a mixture of DH-4005 type polycarboxylate water-reducing agent and calcium lignosulfonate, with a mass ratio of 1:0.2.

[0141] Mix the above-mentioned concrete grout with 20 parts of water to prepare concrete.

[0142] The 28-day compressive strength of the concrete obtained in the above embodiment was tested. Then, the concrete was subjected to a temperature variation test, i.e., it was placed in an environment with a periodic temperature change of -40℃ to 40℃, with a change period of 2 hours and a duration of 2400 hours, and its compressive strength was tested again. The experimental results are shown in Table 1 below.

[0143] Table 1. Results of concrete compressive strength tests before and after temperature variation.

[0144]

[0145] As can be seen from the above embodiments, the concrete grout obtained in this application has high 28-day compressive strength, and after undergoing temperature change testing, the compressive strength remains at a high level, with a low rate of change in compressive strength before and after, and good weather resistance of the concrete.

[0146] Finally, it should be emphasized that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A concrete grout, characterized in that The raw materials include the following mass fractions: Cement 40 parts; Gravel 70-80 parts; Fly ash 23-25 parts; Quartz sand 20-23 parts; Recycled fiber cloth fragments 13-15 parts; Mixed water reducing agent 2-3 parts; The gravel is granite gravel, and the average particle size of the gravel is 5-20 mm; The average particle size of the fly ash is 0.15-0.3 mm; The average particle size of the quartz sand is 0.5-1 mm; The recycled fiber cloth fragments are fragments of cloth made of at least one of polyester, nylon, acrylic, chlorofiber, and viscose fibers; the average diameter of the planar surface of the recycled fiber cloth fragments is 2-3 mm; the fibers in the recycled fiber cloth fragments form pores between the fiber filaments, and the pore diameter is between 0.1-0.3 mm; The mixed water reducing agent is a mixture of polycarboxylic acid type water reducing agent and lignosulfonate type water reducing agent, and the mass ratio of the polycarboxylic acid type water reducing agent to the lignosulfonate type water reducing agent is 1:(0.2-0.3).

2. The concrete grout according to claim 1, wherein: The cement is PO42.5 type Portland cement.

3. The concrete grout according to claim 1 or 2, wherein: The recycled fiber cloth fragments are non-woven fabric or woven cloth made of at least one of polyester, nylon, acrylic, chlorofiber, and viscose fibers, which are crushed by a fabric crusher.

4. The concrete grout according to claim 1 or 2, wherein: The polycarboxylic acid type water reducing agent is selected from DH-4005 type; The lignosulfonate type water reducing agent is selected from at least one of calcium lignosulfonate, sodium lignosulfonate, and magnesium lignosulfonate.

5. A concrete grout according to claim 1 or 2, characterised in that Further including the following mass fractions of raw materials: 0.5-2 parts of an auxiliary agent; The auxiliary agent is selected from at least one of defoaming agents, dispersants, and expanding agents.

6. Process for the production of a concrete grout according to any one of claims 1 to 5, characterized in that The method comprises the following steps: Mixing the cement, the gravel, the fly ash, the quartz sand, the recycled fiber cloth fragments, and the mixed water reducing agent uniformly.

7. The method for preparing the concrete grout according to claim 6, wherein: The recycled fiber cloth fragments are dried before mixing.

8. The method for preparing the concrete grout according to claim 6 or 7, wherein: The mixing step specifically includes: sequentially adding the gravel, the recycled fiber cloth fragments, the quartz sand, the fly ash, the cement, and the mixed water reducing agent into a started stirrer for stirring.

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