CN114620989A - Quick-setting inorganic waterproof plugging agent and preparation method thereof - Google Patents
Quick-setting inorganic waterproof plugging agent and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00293—Materials impermeable to liquids
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
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- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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Abstract
The invention discloses a quick-setting inorganic waterproof plugging agent and a preparation method thereof, belonging to the technical field of building materials. The plugging agent is prepared from the following raw materials: 60-80 parts of cement-based material, 10-20 parts of quartz sand, 10-20 parts of silica fume, 10-20 parts of redispersible latex powder, 5-10 parts of hydroxypropyl methyl cellulose, 5-10 parts of modified carbon fiber, 3-5 parts of expanding agent, 1-3 parts of quicklime, 1-1.8 parts of gypsum and 0.8-1.5 parts of water reducing agent. The quick-setting inorganic waterproof plugging agent has the advantages of short setting time, good plugging and waterproof performance, high strength, good corrosion and frost resistance, no aging when being combined with a matrix into a whole, good water resistance and durability, convenient use, storage and transportation, wide application range, no toxicity, no pollution to the environment, safe operation, and application to various fields of building waterproofing and the like.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a quick-setting inorganic waterproof plugging agent and a preparation method thereof.
Background
In the process of building construction and building facilities such as concrete cement, the condition of water seepage and water leakage of cavities often occurs on the foundations such as tunnels, underground projects, water reservoirs and the like, the common leakage stopping king on the market is generally used, the water is not leaked, the leakage stopping is flexible, and the leakage stopping effect is still achieved when the water leakage point is small or the pressure is small. When the leakage point is too large and pressure exists, the leakage stopping material cannot be solidified in time and is dispersed by water pressure at any time, and the effect is not ideal.
The waterproof leaking stoppage material is a special material with the functions of moisture prevention, permeability resistance and leaking stoppage, is increasingly widely required in the industry fields of municipal construction, national defense and military industry, bridges and tunnels, agricultural water conservancy, transportation and the like, has the advantages of increasing investment, research and development and application year by year, and mainly comprises a plurality of varieties of rigid leaking stoppage, synthetic macromolecules, high polymer modification, solvent modification and the like. The inorganic waterproof plugging material produced by taking high-quality special cement and sandstone as raw materials is a novel rigid material which is simple in construction, convenient to maintain, stable, firm, green and environment-friendly due to the characteristics of good water resistance, high temperature resistance, corrosion resistance, impermeability, crack resistance, bonding and the like, is widely applied to plugging repair of various brick-concrete buildings, roads and underground engineering, and is widely favored by various social industries.
The inorganic waterproof leaking stoppage material generally has two types of quick-setting type and delayed-setting type, wherein the quick-setting type takes sulphoaluminate cement as a base material and silicate cement as a filler, and the setting time and the strength are adjusted by adding auxiliary materials, so that the functional material for quickly preventing water and leaking stoppage is achieved. The sulphoaluminate cement has the advantages of fast hardening, early strength, permeability resistance, frost resistance, compact structure, corrosion resistance, low alkali and the like, the filling and compacting effects of hydration products are obvious, but the later strength is slowly increased, and the phenomenon of retraction is easy to occur. The Portland cement has the advantages of stable strength development, large hydration heat, good performance and low cost, is widely used in various materials, has the defects of overlong setting time, slow development of early strength, low calculus rate and the like, and is difficult to meet the application requirement of quick water prevention and leakage stoppage. Attempts have been made to simply compound two types of cement to obtain inorganic waterproof plugging materials with excellent comprehensive properties, but it has been found that the bonding strength of the mixed material is reduced and the impermeability is poor. Meanwhile, the rapid-setting waterproof leaking stoppage products in the current market have the problems of unstable setting time, low bonding strength, poor durability, complex construction, narrow application range and the like, and the rapid-setting waterproof leaking stoppage products have no ideal rapid waterproof leaking stoppage function and few literature reports of related researches.
Therefore, there is a need to develop an improved waterproof and leaking stoppage material, which can increase the overall strength, anti-permeability performance and durability and corrosion resistance of the material, so as to meet the use requirements of the current building materials.
Disclosure of Invention
The invention provides a fiber-doped waterproof plugging material for overcoming the defects in the prior art, which has short condensation time and good plugging performance and can realize the quick and efficient plugging of building cracks.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
a quick-setting inorganic waterproof plugging agent is prepared from the following raw materials in parts by weight: 60-80 parts of cement-based material, 10-20 parts of quartz sand, 10-20 parts of silica fume, 10-20 parts of redispersible latex powder, 5-10 parts of hydroxypropyl methyl cellulose, 5-10 parts of modified carbon fiber, 3-5 parts of expanding agent, 1-3 parts of quicklime, 1-1.8 parts of gypsum and 0.8-1.5 parts of water reducing agent.
Further, the cement-based material is quick-hardening sulphoaluminate cement R.SAC 42.5 and ordinary portland cement P. O42.5R according to the mass ratio of 1: 0.5-0.75, and mixing.
Further, the fineness of the silica fume is 200-400 meshes.
Further, the hydroxypropylmethylcellulose had a viscosity of 120000-180000 mPas.
Further, the specific preparation method of the modified carbon fiber comprises the following steps:
(1) soaking carbon fiber powder in acetone for 10-20min, filtering and drying to constant weight to obtain pretreated carbon fiber;
(2) and (2) mixing the pretreated carbon fiber according to the solid-liquid ratio of 1 g: 100ml of modified carbon fiber is dispersed in 50 mass percent of trihydroxymethyl aminomethane solution with pH of 7-8, nano silicon dioxide with 50 mass percent of the pretreated carbon fiber and sodium benzoate with 1 mass percent are added, magnetic stirring is carried out for 5-10h at the temperature of 60-70 ℃, and vacuum drying is carried out for 12-24h at the temperature of 60 ℃ to obtain the modified carbon fiber.
Furthermore, the carbon fiber material of the invention has a diameter of 10-20 μm and is purchased from Yufeng carbon shares, Inc. in Tianjin.
Further, the expanding agent is a calcium sulphoaluminate expanding agent and/or a magnesium oxide expanding agent.
Further, the water reducing agent is a naphthalene water reducing agent or a polycarboxylic acid water reducing agent.
A preparation method of a quick-setting inorganic waterproof plugging agent comprises the following steps:
(1) preparing modified carbon fibers: soaking carbon fiber powder in acetone for 10-20min, filtering and drying to constant weight to obtain pretreated carbon fiber; and (3) mixing the pretreated carbon fiber according to the solid-liquid ratio of 1 g: dispersing 150ml of 100-one solution in 50 mass percent trihydroxymethyl aminomethane solution with pH of 7-8, adding nano silicon dioxide with 50 mass percent of pretreated carbon fiber and 1 percent sodium benzoate, magnetically stirring at 60-70 ℃ for 5-10h, and vacuum drying at 60 ℃ for 12-24h to obtain modified carbon fiber;
(2) weighing the raw materials according to the formula, adding the raw materials into a mixer according to the formula amount at normal temperature and normal pressure, stirring for 60-90min, uniformly mixing, discharging, packaging and warehousing.
All the raw materials of the invention are commercially available.
The application method of the waterproof plugging agent comprises the following steps: adding water into the product and water according to the water-cement ratio of 0.2-0.4, stirring and mixing uniformly to obtain slurry, and performing construction.
The invention scientifically mixes sulphoaluminate and Portland cement, makes up for deficiencies of the sulphoaluminate and Portland cement, overcomes the inherent defects of a single gel material, and realizes the stable performances of quick hardening, early strength, permeability resistance, frost resistance, high strength and erosion resistance of a matrix material. And secondly, the redispersible latex powder is added, so that the adhesive force and the adhesive property are good, and the rapid bonding of the gel material can be realized.
The invention modifies commercial carbon fibers, uses acetone to soak the commercial carbon fibers, so that surface defects appear on the surfaces of the carbon fibers, exposes active sites, and then uses trihydroxymethyl aminomethane, nano-silica and sodium benzoate to mix and modify, so that the nano-silica is better combined with the surfaces of the carbon fibers, meanwhile, the trihydroxymethyl aminomethane can promote the uniform dispersion of the silica, the sodium benzoate can promote the rapid reaction of a gel material near the carbon fibers, promote the tight combination of the gel material and the carbon fibers, reduce cracks and shrinkage, promote the waterproof and anti-permeability performance while improving the strength, simultaneously act on two-step modification, overcome the defects of reduced bonding performance and poor and insufficient anti-permeability strength caused by the simultaneous use of two kinds of cement, and greatly promote the performance enhancement effect of the carbon fibers on cement-based materials.
Advantageous effects
The quick-setting inorganic waterproof plugging agent has the advantages of short setting time, good plugging and waterproof performance, high strength, good corrosion and frost resistance, no aging when being combined with a matrix into a whole, good water resistance and durability, convenient use, storage and transportation, wide application range, no toxicity, no pollution to the environment, safe operation, and application to various fields of building waterproofing and the like.
Drawings
Fig. 1 is a scanning electron micrograph of a carbon fiber and a test piece, wherein (a) is an electron micrograph of a raw carbon fiber, and (b) is a cross-sectional view of the test piece obtained by the test using example 4.
Detailed Description
The technical solution of the present invention is further described below with reference to specific embodiments, but is not limited thereto.
Example 1
A quick-setting inorganic waterproof plugging agent is prepared from the following raw materials in parts by weight: 60 parts of cement-based material, 10 parts of quartz sand, 10 parts of silica fume, 10 parts of redispersible latex powder, 5 parts of hydroxypropyl methyl cellulose, 5 parts of modified carbon fiber, 3 parts of expanding agent, 1 part of quicklime, 1 part of gypsum and 0.8 part of water reducing agent.
The cement-based material is quick-hardening sulphoaluminate cement R.SAC 42.5 and ordinary Portland cement P. O42.5R according to the mass ratio of 1: 0.5 and mixed to synthesize.
The fineness of the silica fume is 200-400 meshes.
The viscosity of the hydroxypropylmethylcellulose was 120000mPa · s.
The specific preparation method of the modified carbon fiber comprises the following steps:
(1) soaking carbon fiber powder in acetone for 10min, filtering and drying to constant weight to obtain pretreated carbon fiber;
(2) and (3) mixing the pretreated carbon fiber according to the solid-liquid ratio of 1 g: dispersing 100ml of the modified carbon fiber in 50 mass percent trihydroxymethyl aminomethane solution with pH of 7-8, adding nano silicon dioxide with 50 mass percent of the pretreated carbon fiber and 1 percent of sodium benzoate, magnetically stirring for 5 hours at the temperature of 60-70 ℃, and drying in vacuum for 12 hours at the temperature of 60 ℃ to obtain the modified carbon fiber.
The carbon fiber material of the embodiment has a diameter of 10-20 μm and is purchased from Yufeng carbon resources Co.
The expanding agent is calcium sulphoaluminate expanding agent.
The water reducing agent is a naphthalene water reducing agent.
A preparation method of a quick-setting inorganic waterproof plugging agent comprises the following steps:
(1) preparing modified carbon fibers: soaking carbon fiber powder in acetone for 10min, filtering and drying to constant weight to obtain pretreated carbon fiber; and (3) mixing the pretreated carbon fiber according to the solid-liquid ratio of 1 g: dispersing 100ml of the modified carbon fiber in 50 mass percent trihydroxymethyl aminomethane solution with the pH value of 7-8, adding nano silicon dioxide with the mass of 50 percent of the pretreated carbon fiber and 1 percent of sodium benzoate, magnetically stirring for 5 hours at the temperature of 60-70 ℃, and drying in vacuum for 12 hours at the temperature of 60 ℃ to obtain the modified carbon fiber;
(2) weighing the raw materials according to the formula, adding the raw materials into a mixer according to the formula amount at normal temperature and normal pressure, stirring for 60min, uniformly mixing, discharging, packaging and warehousing.
Each of the starting materials in this example is commercially available.
The application method of the waterproof plugging agent comprises the following steps: adding water into the product and water according to the water-cement ratio of 0.2-0.4, stirring and mixing uniformly to obtain slurry, and performing construction.
Example 2
A quick-setting inorganic waterproof plugging agent is prepared from the following raw materials in parts by weight: 65 parts of cement-based material, 13 parts of quartz sand, 15 parts of silica fume, 15 parts of redispersible latex powder, 6 parts of hydroxypropyl methyl cellulose, 7 parts of modified carbon fiber, 4 parts of expanding agent, 1 part of quicklime, 1.2 parts of gypsum and 1 part of water reducing agent.
The cement-based material is quick-hardening sulphoaluminate cement R.SAC 42.5 and ordinary Portland cement P. O42.5R according to the mass ratio of 1: 0.75 by mixing.
The fineness of the silica fume is 200-400 meshes.
The viscosity of the hydroxypropylmethylcellulose was 150000 mPas.
The specific preparation method of the modified carbon fiber comprises the following steps:
(1) soaking carbon fiber powder in acetone for 15min, filtering and drying to constant weight to obtain pretreated carbon fiber;
(2) and (3) mixing the pretreated carbon fiber according to the solid-liquid ratio of 1 g: dispersing 100ml of the modified carbon fiber in 50 mass percent trihydroxymethyl aminomethane solution with pH of 7-8, adding nano silicon dioxide with 50 mass percent of the pretreated carbon fiber and 1 mass percent of sodium benzoate, magnetically stirring for 8 hours at the temperature of 60-70 ℃, and drying in vacuum for 12 hours at the temperature of 60 ℃ to obtain the modified carbon fiber.
The carbon fiber material of the embodiment has a diameter of 10-20 μm and is purchased from Yufeng carbon resources Co.
The swelling agent is a magnesium oxide swelling agent.
The water reducing agent is a polycarboxylic acid water reducing agent.
A preparation method of a quick-setting inorganic waterproof plugging agent comprises the following steps:
(1) preparing modified carbon fibers: soaking carbon fiber powder in acetone for 15min, filtering and drying to constant weight to obtain pretreated carbon fiber; and (3) mixing the pretreated carbon fiber according to the solid-liquid ratio of 1 g: dispersing 100ml of the modified carbon fiber in 50 mass percent trihydroxymethyl aminomethane solution with the pH value of 7-8, adding nano silicon dioxide with the mass of 50 percent of the pretreated carbon fiber and 1 percent of sodium benzoate, magnetically stirring for 8 hours at the temperature of 60-70 ℃, and drying in vacuum for 12 hours at the temperature of 60 ℃ to obtain the modified carbon fiber;
(2) weighing the raw materials according to the formula, adding the raw materials into a mixer according to the formula amount at normal temperature and normal pressure, stirring for 90min, uniformly mixing, discharging, packaging and warehousing.
Each of the starting materials in this example is commercially available.
The application method of the waterproof plugging agent comprises the following steps: adding water into the product and water according to the water-cement ratio of 0.2-0.4, stirring and mixing uniformly to obtain slurry, and performing construction.
Example 3
A quick-setting inorganic waterproof plugging agent is prepared from the following raw materials in parts by weight: 70 parts of cement-based material, 15 parts of quartz sand, 18 parts of silica fume, 17 parts of redispersible latex powder, 8 parts of hydroxypropyl methyl cellulose, 8 parts of modified carbon fiber, 4 parts of expanding agent, 2 parts of quicklime, 1.6 parts of gypsum and 1.2 parts of water reducing agent.
The cement-based material is quick-hardening sulphoaluminate cement R.SAC 42.5 and ordinary Portland cement P. O42.5R according to the mass ratio of 1: 0.75 by mixing.
The fineness of the silica fume is 200-400 meshes.
The viscosity of the hydroxypropylmethylcellulose was 180000mPa · s.
The specific preparation method of the modified carbon fiber comprises the following steps:
(1) soaking carbon fiber powder in acetone for 20min, filtering and drying to constant weight to obtain pretreated carbon fiber;
(2) and (3) mixing the pretreated carbon fiber according to the solid-liquid ratio of 1 g: dispersing 150ml of the modified carbon fiber in 50 mass percent trihydroxymethyl aminomethane solution with pH of 7-8, adding nano silicon dioxide with 50 mass percent of the pretreated carbon fiber and 1 mass percent of sodium benzoate, magnetically stirring the mixture for 10 hours at the temperature of 60-70 ℃, and drying the mixture for 24 hours under vacuum at the temperature of 60 ℃ to obtain the modified carbon fiber.
The carbon fiber material of the embodiment has a diameter of 10-20 μm and is purchased from Yufeng carbon resources Co.
The expanding agent is calcium sulphoaluminate expanding agent.
The water reducing agent is a naphthalene water reducing agent.
A preparation method of a quick-setting inorganic waterproof plugging agent comprises the following steps:
(1) preparing modified carbon fibers: soaking carbon fiber powder in acetone for 20min, filtering and drying to constant weight to obtain pretreated carbon fiber; and (3) mixing the pretreated carbon fiber according to the solid-liquid ratio of 1 g: dispersing 150ml of the carbon fiber into 50 mass percent trihydroxymethyl aminomethane solution with the pH value of 7-8, adding nano silicon dioxide with the mass of 50 percent of the pretreated carbon fiber and 1 percent of sodium benzoate, magnetically stirring the mixture for 10 hours at the temperature of 60-70 ℃, and drying the mixture for 24 hours in vacuum at the temperature of 60 ℃ to obtain modified carbon fiber;
(2) weighing the raw materials according to the formula, adding the raw materials into a mixer according to the formula amount at normal temperature and normal pressure, stirring for 90min, uniformly mixing, discharging, packaging and warehousing.
Each of the starting materials in this example is commercially available.
The application method of the waterproof plugging agent comprises the following steps: adding water into the product and water according to the water-cement ratio of 0.2-0.4, stirring and mixing uniformly to obtain slurry, and performing construction.
Example 4
A quick-setting inorganic waterproof plugging agent is prepared from the following raw materials in parts by weight: 80 parts of cement-based material, 20 parts of quartz sand, 20 parts of silica fume, 20 parts of redispersible latex powder, 10 parts of hydroxypropyl methyl cellulose, 10 parts of modified carbon fiber, 5 parts of expanding agent, 3 parts of quicklime, 1.8 parts of gypsum and 1.5 parts of water reducing agent.
The cement-based material is quick-hardening sulphoaluminate cement R.SAC 42.5 and ordinary Portland cement P. O42.5R according to the mass ratio of 1: 0.75 by mixing.
The fineness of the silica fume is 200-400 meshes.
The viscosity of the hydroxypropylmethylcellulose was 180000mPa · s.
The specific preparation method of the modified carbon fiber comprises the following steps:
(1) soaking carbon fiber powder in acetone for 20min, filtering and drying to constant weight to obtain pretreated carbon fiber;
(2) and (2) mixing the pretreated carbon fiber according to the solid-liquid ratio of 1 g: dispersing 150ml of the modified carbon fiber in 50 mass percent trihydroxymethyl aminomethane solution with pH of 7-8, adding nano silicon dioxide with 50 mass percent of the pretreated carbon fiber and 1 mass percent of sodium benzoate, magnetically stirring the mixture for 10 hours at the temperature of 60-70 ℃, and drying the mixture for 24 hours under vacuum at the temperature of 60 ℃ to obtain the modified carbon fiber.
The carbon fiber material of the embodiment has a diameter of 10-20 μm and is purchased from Yufeng carbon resources Co.
The swelling agent is a magnesium oxide swelling agent.
The water reducing agent is a polycarboxylic acid water reducing agent.
A preparation method of a quick-setting inorganic waterproof plugging agent comprises the following steps:
(1) preparing modified carbon fibers: soaking carbon fiber powder in acetone for 20min, filtering and drying to constant weight to obtain pretreated carbon fiber; and (2) mixing the pretreated carbon fiber according to the solid-liquid ratio of 1 g: dispersing 150ml of the carbon fiber into 50 mass percent trihydroxymethyl aminomethane solution with the pH value of 7-8, adding nano silicon dioxide with the mass of 50 percent of the pretreated carbon fiber and 1 percent of sodium benzoate, magnetically stirring the mixture at the temperature of 60-70 ℃ for 5-10h, and drying the mixture in vacuum at the temperature of 60 ℃ for 24h to obtain modified carbon fiber;
(2) weighing the raw materials according to the formula, adding the raw materials into a mixer according to the formula amount at normal temperature and normal pressure, stirring for 90min, uniformly mixing, discharging, packaging and warehousing.
Each of the starting materials in this example is commercially available.
The application method of the waterproof plugging agent comprises the following steps: adding water into the product and water according to the water-cement ratio of 0.2-0.4, stirring and mixing uniformly to obtain slurry, and performing construction.
Comparative example 1
A quick-setting inorganic waterproof plugging agent is prepared from the following raw materials in parts by weight: 80 parts of cement-based material, 20 parts of quartz sand, 20 parts of silica fume, 20 parts of redispersible latex powder, 10 parts of hydroxypropyl methyl cellulose, 10 parts of carbon fiber, 5 parts of expanding agent, 3 parts of quicklime, 1.8 parts of gypsum and 1.5 parts of water reducing agent.
The cement-based material is quick-hardening sulphoaluminate cement R.SAC 42.5 and ordinary Portland cement P. O42.5R according to the mass ratio of 1: 0.75 by mixing.
The fineness of the silica fume is 200-400 meshes.
The viscosity of the hydroxypropylmethylcellulose was 180000mPa · s.
The carbon fiber material of the comparative example has a diameter of 10-20 μm and is purchased from Yufeng carbon resources Co.
The expanding agent is a magnesium oxide expanding agent.
The water reducing agent is a polycarboxylic acid water reducing agent.
A preparation method of a quick-setting inorganic waterproof plugging agent comprises the following steps: weighing the raw materials according to the formula, adding the raw materials into a mixer according to the formula amount at normal temperature and normal pressure, stirring for 90min, uniformly mixing, discharging, packaging and warehousing.
Each of the materials of this comparative example was commercially available.
The application method of the waterproof plugging agent in the comparative example comprises the following steps: adding water into the product and water according to the water-cement ratio of 0.2-0.4, stirring and mixing uniformly to obtain slurry, and performing construction.
This comparative example is partially the same as example 4 except that commercial carbon fibers were used as they were without modification of the carbon fibers.
Comparative example 2
A quick-setting inorganic waterproof plugging agent is prepared from the following raw materials in parts by weight: 80 parts of cement-based material, 20 parts of quartz sand, 20 parts of silica fume, 20 parts of redispersible latex powder, 10 parts of hydroxypropyl methyl cellulose, 10 parts of modified carbon fiber, 5 parts of expanding agent, 3 parts of quicklime, 1.8 parts of gypsum and 1.5 parts of water reducing agent.
The cement-based material is quick-hardening sulphoaluminate cement R.SAC 42.5 and ordinary Portland cement P. O42.5R according to the mass ratio of 1: 0.75 by mixing.
The fineness of the silica fume is 200-400 meshes.
The viscosity of the hydroxypropylmethylcellulose was 180000mPa · s.
The specific preparation method of the modified carbon fiber comprises the following steps:
(1) fibers are mixed according to the solid-liquid ratio of 1 g: dispersing 150ml of the carbon fiber in 50 mass percent trihydroxymethyl aminomethane solution with pH of 7-8, adding nano silicon dioxide with the mass of 50 percent of the carbon fiber and sodium benzoate with the mass of 1 percent of the carbon fiber, magnetically stirring the mixture for 10 hours at the temperature of 60-70 ℃, and drying the mixture for 24 hours under vacuum at the temperature of 60 ℃ to obtain the modified carbon fiber.
The carbon fiber material of the comparative example has a diameter of 10-20 μm and is purchased from Yufeng carbon resources Co.
The swelling agent is a magnesium oxide swelling agent.
The water reducing agent is a polycarboxylic acid water reducing agent.
A preparation method of a quick-setting inorganic waterproof plugging agent comprises the following steps:
(1) preparing modified carbon fibers: soaking carbon fiber powder in acetone for 20min, filtering and drying to constant weight to obtain pretreated carbon fiber; and (3) mixing the pretreated carbon fiber according to the solid-liquid ratio of 1 g: dispersing 150ml of the carbon fiber into 50 mass percent trihydroxymethyl aminomethane solution with the pH value of 7-8, adding nano silicon dioxide with the mass of 50 percent of the pretreated carbon fiber and 1 percent of sodium benzoate, magnetically stirring the mixture at the temperature of 60-70 ℃ for 5-10h, and drying the mixture in vacuum at the temperature of 60 ℃ for 24h to obtain modified carbon fiber;
(2) weighing the raw materials according to the formula, adding the raw materials into a mixer according to the formula amount at normal temperature and normal pressure, stirring for 90min, uniformly mixing, discharging, packaging and warehousing.
Each of the materials of this comparative example was commercially available.
The application method of the waterproof plugging agent in the comparative example comprises the following steps: adding water into the product and water according to the water-cement ratio of 0.2-0.4, stirring and mixing uniformly to obtain slurry, and then carrying out construction.
This comparative example is similar in part to example 4 in the raw materials and preparation method, except that the first acetone modification of the carbon fibers was not performed.
Comparative example 3
A quick-setting inorganic waterproof plugging agent is prepared from the following raw materials in parts by weight: 80 parts of cement-based material, 20 parts of quartz sand, 20 parts of silica fume, 20 parts of redispersible latex powder, 10 parts of hydroxypropyl methyl cellulose, 10 parts of modified carbon fiber, 5 parts of expanding agent, 3 parts of quicklime, 1.8 parts of gypsum and 1.5 parts of water reducing agent.
The cement-based material is quick-hardening sulphoaluminate cement R.SAC 42.5 and ordinary Portland cement P. O42.5R according to the mass ratio of 1: 0.75 by mixing.
The fineness of the silica fume is 200-400 meshes.
The viscosity of the hydroxypropylmethylcellulose was 180000mPa · s.
The specific preparation method of the modified carbon fiber comprises the following steps:
(1) soaking carbon fiber powder in acetone for 20min, filtering and drying to constant weight to obtain pretreated carbon fiber;
(2) and (2) mixing the pretreated carbon fiber according to the solid-liquid ratio of 1 g: dispersing 150ml of the modified carbon fiber into the aqueous solution, adding nano silicon dioxide with the mass of 50 percent of the pretreated carbon fiber, magnetically stirring the mixture for 10 hours at the temperature of between 60 and 70 ℃, and drying the mixture for 24 hours in vacuum at the temperature of between 60 ℃ to obtain the modified carbon fiber.
The carbon fiber material of the comparative example has a diameter of 10-20 μm and is purchased from Yufeng carbon resources Co.
The swelling agent is a magnesium oxide swelling agent.
The water reducing agent is a polycarboxylic acid water reducing agent.
A preparation method of a quick-setting inorganic waterproof plugging agent comprises the following steps:
(1) preparing modified carbon fibers: soaking carbon fiber powder in acetone for 20min, filtering and drying to constant weight to obtain pretreated carbon fiber; and (3) mixing the pretreated carbon fiber according to the solid-liquid ratio of 1 g: dispersing 150ml of the carbon fiber into the aqueous solution, adding nano silicon dioxide with the mass of 50 percent of that of the pretreated carbon fiber, magnetically stirring for 5 to 10 hours at the temperature of between 60 and 70 ℃, and drying in vacuum for 24 hours at the temperature of between 60 ℃ to obtain modified carbon fiber;
(2) weighing the raw materials according to the formula, adding the raw materials into a mixer according to the formula amount at normal temperature and normal pressure, stirring for 90min, uniformly mixing, discharging, packaging and warehousing.
Each of the materials of this comparative example was commercially available.
The application method of the waterproof plugging agent in the comparative example comprises the following steps: adding water into the product and water according to the water-cement ratio of 0.2-0.4, stirring and mixing uniformly to obtain slurry, and performing construction.
The comparative example is partially the same as example 4 except that the carbon fiber is not modified with tris and sodium benzoate.
Performance testing
Experimental Material
The cement used in the test was 42.5 quick-hardening sulphoaluminate cement produced by Yizhou cement plant and used as 42.5 ordinary Portland cement
Test method
The tests of the setting time, the breaking strength, the compressive strength, the seepage pressure resistance, the seepage pressure difference resistance, the bonding strength, the heat resistance, the freeze-thaw cycle performance and the like are all tested according to the inorganic waterproof plugging material (GB 23440-.
The test results are shown in table 1:
table 1 results of performance testing
As can be seen from the data in the table, the test piece obtained in the embodiment of the invention has short condensation time, can realize rapid leakage repair, has higher compressive strength and flexural strength, has high seepage pressure resistance, and completely meets the national standard requirements. The comparative examples 1 to 3 lack the modification step, and all the performances of the carbon fiber are reduced in different degrees, because the comparative example of the modification means is changed, the carbon fiber can not fully play a role, the density of the matrix is reduced, and the performances such as strength, impermeability and the like are reduced.
It should be noted that the above-mentioned embodiments are only some of the preferred modes for implementing the invention, and not all of them. Obviously, all other embodiments obtained by persons of ordinary skill in the art based on the above-mentioned embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.
Claims (7)
1. The quick-setting inorganic waterproof plugging agent is characterized by being prepared from the following raw materials in parts by weight: 60-80 parts of cement-based material, 10-20 parts of quartz sand, 10-20 parts of silica fume, 10-20 parts of redispersible latex powder, 5-10 parts of hydroxypropyl methyl cellulose, 5-10 parts of modified carbon fiber, 3-5 parts of expanding agent, 1-3 parts of quicklime, 1-1.8 parts of gypsum and 0.8-1.5 parts of water reducing agent.
2. The quick-setting inorganic waterproof plugging agent according to claim 1, wherein the cement-based material is a quick-hardening sulphoaluminate cement R SAC42.5 and a common Portland cement P O42.5R in a mass ratio of 1: 0.5-0.75, and mixing.
3. The quick-setting inorganic water-proofing and leak-stopping agent as claimed in claim 1, wherein the viscosity of the hydroxypropylmethylcellulose is 120000-180000 mPas.
4. The quick-setting inorganic waterproof plugging agent according to claim 1, wherein the modified carbon fiber is prepared by the following specific method:
(1) soaking carbon fiber powder in acetone for 10-20min, filtering and drying to constant weight to obtain pretreated carbon fiber;
(2) and (3) mixing the pretreated carbon fiber according to the solid-liquid ratio of 1 g: 100ml of modified carbon fiber is dispersed in 50 mass percent of trihydroxymethyl aminomethane solution with pH of 7-8, nano silicon dioxide with 50 mass percent of the pretreated carbon fiber and sodium benzoate with 1 mass percent are added, magnetic stirring is carried out for 5-10h at the temperature of 60-70 ℃, and vacuum drying is carried out for 12-24h at the temperature of 60 ℃ to obtain the modified carbon fiber.
5. The quick-setting inorganic waterproof plugging agent according to claim 1, wherein the swelling agent is calcium sulfoaluminate swelling agent and/or magnesium oxide swelling agent.
6. The quick-setting inorganic waterproof plugging agent according to claim 1, wherein the water reducing agent is a naphthalene water reducing agent or a polycarboxylic acid water reducing agent.
7. A preparation method of the quick-setting inorganic waterproof plugging agent as claimed in any one of claims 1 to 6, characterized by comprising the following steps:
(1) preparing modified carbon fibers: soaking carbon fiber powder in acetone for 10-20min, filtering and drying to constant weight to obtain pretreated carbon fiber; and (3) mixing the pretreated carbon fiber according to the solid-liquid ratio of 1 g: 100ml of 100-150ml of the modified carbon fiber is dispersed in a trihydroxymethyl aminomethane solution with the mass concentration of 50 percent and the pH value of 7-8, nano silicon dioxide with the mass of 50 percent of the pretreated carbon fiber and sodium benzoate with the mass of 1 percent are added, magnetic stirring is carried out for 5-10h at the temperature of 60-70 ℃, and vacuum drying is carried out for 12-24h at the temperature of 60 ℃ to obtain the modified carbon fiber;
(2) weighing the raw materials according to the formula, adding the raw materials into a mixer according to the formula amount at normal temperature and normal pressure, stirring for 60-90min, uniformly mixing, discharging, packaging and warehousing.
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| CN115872674A (en) * | 2022-10-31 | 2023-03-31 | 河南三棵树新材料科技有限公司 | Plugging material assisting in sewage treatment and preparation method thereof |
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