CN111099863A - Carbon fiber reinforced high-strength mortar, preparation method and construction method - Google Patents
Carbon fiber reinforced high-strength mortar, preparation method and construction method Download PDFInfo
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- CN111099863A CN111099863A CN201911314895.5A CN201911314895A CN111099863A CN 111099863 A CN111099863 A CN 111099863A CN 201911314895 A CN201911314895 A CN 201911314895A CN 111099863 A CN111099863 A CN 111099863A
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- mortar
- water
- carbon fiber
- reducing agent
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- C—CHEMISTRY; METALLURGY
- 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
- 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
- C04B28/04—Portland cements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
-
- C—CHEMISTRY; METALLURGY
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2038—Resistance against physical degradation
-
- C—CHEMISTRY; METALLURGY
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- C—CHEMISTRY; METALLURGY
- 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
- C04B2111/72—Repairing or restoring existing buildings or building materials
-
- C—CHEMISTRY; METALLURGY
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- C—CHEMISTRY; METALLURGY
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a carbon fiber reinforced high-strength mortar, a preparation method and a construction method, wherein the components comprise general portland cement, silica fume, silica sand, quartz sand, nano carbon fiber, a water reducing agent, a defoaming agent and water; the preparation method comprises the steps of placing water, the water reducing agent, the defoaming agent and the carbon nanofibers in a mortar stirrer, and stirring for 5min to obtain a suspension of the water, the carbon nanofibers and the high efficiency water reducing agent; mixing silica fume, silica sand, quartz sand and general portland cement into a mortar stirrer, stirring for 3min, uniformly stirring, slowly pouring the prepared water, nano carbon fiber and water reducer turbid liquid, and stirring for 3min to obtain the mortar. The mortar has the beneficial effects that the mortar is convenient to prepare on a construction site, the 28d strength of the mortar can reach 180MPa, the flexural strength can reach 25MPa, and the mortar can meet the requirements of engineering construction reinforcement or repair of various ultrahigh-strength high-density materials.
Description
Technical Field
The invention belongs to the field of building materials, and particularly relates to carbon fiber reinforced high-strength mortar, a preparation method and a construction method.
Background
The building structures such as bridges, highway pavements and the like are easy to bend, damage and corrode, and high-strength mortar capable of being quickly solidified to form strength is required to be used for reinforcing and repairing. The currently common concrete structure reinforcing method comprises the following steps: concrete is coated outside the concrete column, so that the section area and the reinforcing bars of the structure are increased; continuously pasting carbon fiber cloth in an annular direction without intervals; the steel sections are wrapped at two corners or four corners of the concrete column, and the angle steel is welded on the flat steel hoop so as to enhance the rigidity and the stress performance of the steel column; winding the annealed steel wire to restrain the reinforced concrete of the compression member; the steel plate is glued to outsourcing glues the angle steel and the package, when improving post bearing capacity, has the horizontal restraint effect in addition. The disadvantage is that these methods either take up a large amount of building area; or the construction process is complex and has high requirements on environmental conditions; or have poor durability. The carbon fiber reinforced concrete is a novel concrete researched in recent years, has higher strength, better toughness and smaller volume shrinkage compared with common concrete, and shows good crack resistance. The concrete structure repairing material can be used for repairing a concrete structure, can be poured in a thin layer and a large area without vibration due to excellent mechanical property and working performance, can quickly obtain required strength, can quickly recover the using function of the concrete structure, and is a novel concrete structure repairing material with great prospect.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the carbon fiber reinforced high-strength mortar, the preparation method and the construction method, the mortar is convenient to prepare on a construction site, the 28d strength of the mortar can reach 180MPa, the breaking strength can reach 25MPa, and the reinforcing or repairing of various engineering buildings needing ultrahigh-strength high-density materials can be met.
In order to achieve the purpose, the invention adopts the following technical scheme:
the carbon fiber reinforced high-strength mortar is characterized by comprising the following components in parts by mass: 1 part of general portland cement, 0.1-0.3 part of silica fume, 0.5-0.7 part of silica sand, 0.05-0.1 part of quartz sand, 0.002-0.003 part of carbon nanofiber, 0.01-0.02 part of water reducing agent, 0.001-0.002 part of defoaming agent and a proper amount of water; the preparation method of the carbon fiber reinforced high-strength mortar comprises the following steps: placing water, a water reducing agent, a defoaming agent and the carbon nanofibers in a mortar stirrer, and stirring for 5min to obtain a suspension of the water, the carbon nanofibers and the high efficiency water reducing agent; mixing silica fume, silica sand, quartz sand and general portland cement into a mortar stirrer, stirring for 3min, uniformly stirring, slowly pouring the prepared water, nano carbon fiber and water reducer turbid liquid, and stirring for 3min to obtain the mortar.
In a specific embodiment of the invention, the strength grade of the general portland cement is not less than 42.5; the fineness of the silica sand is 20-40 meshes; the fineness of the quartz sand is 100-200 meshes; the antifoaming agent is phosphoric acid tricuspid ester or SP-202 series antifoaming agent for water; the water reducing agent is a polycarboxylate water reducing agent; the diameter of the nano carbon fiber is 200-800 nanometers, and the length of the nano carbon fiber is 5-50 micrometers.
The invention also aims to provide a preparation method of the carbon fiber reinforced high-strength mortar, which is characterized by comprising the following steps: placing water, a water reducing agent, a defoaming agent and the carbon nanofibers in a mortar stirrer, and stirring for 5min to obtain a suspension of the water, the carbon nanofibers and the high efficiency water reducing agent; mixing silica fume, silica sand, quartz sand and general portland cement into a mortar stirrer, stirring for 3min, uniformly stirring, slowly pouring the prepared water, nano carbon fiber and water reducer suspension, and stirring for 3min to obtain mortar; the composition comprises the following components in parts by mass: 1 part of general portland cement, 0.1-0.3 part of silica fume, 0.5-0.7 part of silica sand, 0.05-0.1 part of quartz sand, 0.002-0.003 part of carbon nanofiber, 0.01-0.02 part of water reducing agent, 0.001-0.002 part of defoaming agent and a proper amount of water.
In a specific embodiment of the invention, the strength grade of the general portland cement is not less than 42.5; the fineness of the silica sand is 20-40 meshes; the fineness of the quartz sand is 100-200 meshes; the antifoaming agent is phosphoric acid tricuspid ester or SP-202 series antifoaming agent for water; the water reducing agent is a polycarboxylate water reducing agent; the diameter of the nano carbon fiber is 200-800 nanometers, and the length of the nano carbon fiber is 5-50 micrometers.
The invention also aims to provide a construction method of the carbon fiber reinforced high-strength mortar, which is characterized in that construction is carried out by a manual paving or pumping way to form a flat repairing mortar layer; after the mortar layer is initially solidified, the surface is glazed, the straw curtain quilt and the plastic film are covered, and the moisture is preserved and maintained for 7 days.
In a specific embodiment of the invention, the construction method of the carbon fiber reinforced high-strength mortar cannot be carried out under a negative temperature condition.
Compared with the prior art, the invention has the advantages that the obtained carbon fiber reinforced high-strength mortar has compact internal structure, smooth molding surface and high strength, the compressive strength is more than or equal to 180MPa and the breaking strength is more than or equal to 25MPa after 28 days of normal-temperature curing; the tensile and shear resistance is strong, and the anti-permeability and the abrasion resistance are better; good fluidity, no crack, few and small pores, good volume stability and high durability; the preparation process is simple and is easy to realize on the engineering construction site.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments. The examples are carried out on the premise of the technical scheme of the invention, and are not intended to limit the implementation mode of the invention. The following examples are given to illustrate the preferred embodiments of the present invention, and all obvious variations and modifications are within the scope of the present invention.
Example 1
The carbon fiber reinforced high-strength mortar comprises 1 part of P.I-42.5 Portland cement, 0.2 part of silica fume, 0.6 part of silica sand, 0.05 part of quartz sand, 0.002 part of carbon nanofibers, 0.012 part of polycarboxylic acid water reducing agent, 0.0015 part of defoaming agent and a proper amount of water. Adding 0.2 part of water into a construction site, uniformly stirring, placing water, a polycarboxylic acid water reducing agent, a defoaming agent and carbon nanofibers into a mortar stirrer to stir for 5min when stirring raw materials, then mixing silica fume, silica sand, quartz sand and P.I-42.5 portland cement into the mortar stirrer to stir for 3min, uniformly stirring, slowly pouring the prepared water, carbon nanofibers and water reducing agent turbid liquid, and stirring for 3min to obtain the mortar. And (5) constructing by using a manual spreading mode to form a smooth repairing layer, and preserving moisture and maintaining for 7 days.
Tests show that the 28-day compressive strength of the mortar is 183.8MPa, and the flexural strength is 26.4 MPa.
Example 2
The carbon fiber reinforced high-strength mortar comprises 1 part of P.I-42.5 Portland cement, 0.25 part of silica fume, 0.5 part of silica sand, 0.1 part of quartz sand, 0.002 part of carbon nanofibers, 0.01 part of polycarboxylic acid water reducing agent, 0.002 part of defoaming agent and a proper amount of water. Adding 0.25 part of water into a concrete stirring station, uniformly stirring, placing the water, a water reducing agent, a defoaming agent and the carbon nanofibers into a mortar stirrer to stir for 5min while stirring the raw materials, then mixing the silica fume, the silica sand, the quartz sand and the P.I-42.5 portland cement into the mortar stirrer to stir for 3min, uniformly stirring, slowly pouring the prepared water, the carbon nanofibers and the water reducing agent turbid liquid, and stirring for 3min to obtain the mortar. And (5) reinforcing construction is carried out by using a pumping mode, and moisturizing and maintaining are carried out for 7 days.
The test shows that the 28-day compressive strength of the mortar is 190.2MPa, and the flexural strength is 27.5 MPa.
Example 3
The carbon fiber reinforced high-strength mortar comprises 1 part of P.I-42.5 Portland cement, 0.15 part of silica fume, 0.7 part of silica sand, 0.05 part of quartz sand, 0.002 part of carbon nanofibers, 0.015 part of polycarboxylic acid water reducing agent, 0.002 part of defoaming agent and a proper amount of water. Adding 0.18 part of water into a concrete stirring station, uniformly stirring, placing the water, the high-efficiency water reducing agent, the defoaming agent and the carbon nanofibers into a mortar stirrer to stir for 5min while stirring the raw materials, then mixing the silica fume, the silica sand, the quartz sand and the P.I-42.5 Portland cement into the mortar stirrer to stir for 3min, uniformly stirring, slowly pouring the prepared water, the carbon nanofibers and the water reducing agent turbid liquid, and stirring for 3min to obtain the mortar. And (5) transporting the concrete delivery wagon to a site, constructing in a manual paving mode to form a smooth repairing layer, and maintaining for 7 days in a moisturizing mode.
Tests show that the 28-day compressive strength of the mortar is 185.6MPa, and the flexural strength is 26.9MPa
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.
Claims (6)
1. The carbon fiber reinforced high-strength mortar is characterized by comprising the following components in parts by mass: 1 part of general portland cement, 0.1-0.3 part of silica fume, 0.5-0.7 part of silica sand, 0.05-0.1 part of quartz sand, 0.002-0.003 part of carbon nanofiber, 0.01-0.02 part of water reducing agent, 0.001-0.002 part of defoaming agent and a proper amount of water; the preparation method of the carbon fiber reinforced high-strength mortar comprises the following steps: placing water, a water reducing agent, a defoaming agent and the carbon nanofibers in a mortar stirrer, and stirring for 5min to obtain a suspension of the water, the carbon nanofibers and the high efficiency water reducing agent; mixing silica fume, silica sand, quartz sand and general portland cement into a mortar stirrer, stirring for 3min, uniformly stirring, slowly pouring the prepared water, nano carbon fiber and water reducer turbid liquid, and stirring for 3min to obtain the mortar.
2. The carbon fiber reinforced high-strength mortar according to claim 1, wherein: the strength grade of the general portland cement is not lower than 42.5; the fineness of the silica sand is 20-40 meshes; the fineness of the quartz sand is 100-200 meshes; the antifoaming agent is phosphoric acid tricuspid ester or SP-202 series antifoaming agent for water; the water reducing agent is a polycarboxylate water reducing agent; the diameter of the nano carbon fiber is 200-800 nanometers, and the length of the nano carbon fiber is 5-50 micrometers.
3. The preparation method of the carbon fiber reinforced high-strength mortar is characterized by comprising the following steps: placing water, a high-efficiency water reducing agent, a defoaming agent and the carbon nanofibers in a mortar mixer, and stirring for 5min to obtain water, carbon nanofibers and a water reducing agent suspension; mixing silica fume, silica sand, quartz sand and general portland cement into a mortar stirrer, stirring for 3min, uniformly stirring, slowly pouring the prepared water, nano carbon fiber and water reducer suspension, and stirring for 3min to obtain mortar; the composition comprises the following components in parts by mass: 1 part of general portland cement, 0.1-0.3 part of silica fume, 0.5-0.7 part of silica sand, 0.05-0.1 part of quartz sand, 0.002-0.003 part of carbon nanofiber, 0.01-0.02 part of water reducing agent, 0.001-0.002 part of defoaming agent and a proper amount of water.
4. The preparation method of the carbon fiber reinforced high-strength mortar according to claim 3, wherein the method comprises the following steps: the strength grade of the general portland cement is not lower than 42.5; the fineness of the silica sand is 20-40 meshes; the fineness of the quartz sand is 100-200 meshes; the antifoaming agent is phosphoric acid tricuspid ester or SP-202 series antifoaming agent for water; the water reducing agent is a polycarboxylate water reducing agent; the diameter of the nano carbon fiber is 200-800 nanometers, and the length of the nano carbon fiber is 5-50 micrometers.
5. The construction method of the carbon fiber reinforced high-strength mortar according to any one of claims 1 to 2, characterized in that the construction is carried out by manual spreading or pumping to form a flat repair mortar layer; after the mortar layer is initially solidified, the surface is glazed, the straw curtain quilt and the plastic film are covered, and the moisture is preserved and maintained for 7 days.
6. The construction method of the carbon fiber reinforced high-strength mortar according to claim 5, wherein: the construction method of the carbon fiber reinforced high-strength mortar cannot be used for construction under a negative temperature condition.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911314895.5A CN111099863A (en) | 2019-12-19 | 2019-12-19 | Carbon fiber reinforced high-strength mortar, preparation method and construction method |
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| CN201911314895.5A CN111099863A (en) | 2019-12-19 | 2019-12-19 | Carbon fiber reinforced high-strength mortar, preparation method and construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112390578A (en) * | 2020-11-16 | 2021-02-23 | 同济大学 | CNF reinforced steel slag-based geopolymer cementing material, forming body, preparation and application thereof |
| CN113060989A (en) * | 2021-03-25 | 2021-07-02 | 中国人民解放军空军工程大学 | A method for enhancing concrete resistance and electromagnetic shielding performance with nano-carbon fibers |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7285167B2 (en) * | 2003-10-08 | 2007-10-23 | Ogden Technologies, Inc. | Fiber reinforced concrete/cement products and method of preparation |
| CN101186479A (en) * | 2007-12-11 | 2008-05-28 | 大连理工大学 | A kind of preparation method of super high-strength mortar |
| CN101274831B (en) * | 2008-05-16 | 2012-06-27 | 哈尔滨工业大学 | Carbon nano-tube fiber cement-based material and preparation thereof |
| US20140111231A1 (en) * | 2012-10-19 | 2014-04-24 | University Of Houston | Systems and methods utilizing carbon nanofiber aggregate for performance monitoring of concrete structures |
| CN104446264A (en) * | 2014-12-19 | 2015-03-25 | 湖南明湘科技发展有限公司 | Cement-based nanocomposite material and preparation method thereof |
| CN107151118A (en) * | 2017-05-24 | 2017-09-12 | 广东信强混凝土有限公司 | A kind of refractory concrete |
-
2019
- 2019-12-19 CN CN201911314895.5A patent/CN111099863A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7285167B2 (en) * | 2003-10-08 | 2007-10-23 | Ogden Technologies, Inc. | Fiber reinforced concrete/cement products and method of preparation |
| CN101186479A (en) * | 2007-12-11 | 2008-05-28 | 大连理工大学 | A kind of preparation method of super high-strength mortar |
| CN101274831B (en) * | 2008-05-16 | 2012-06-27 | 哈尔滨工业大学 | Carbon nano-tube fiber cement-based material and preparation thereof |
| US20140111231A1 (en) * | 2012-10-19 | 2014-04-24 | University Of Houston | Systems and methods utilizing carbon nanofiber aggregate for performance monitoring of concrete structures |
| CN104446264A (en) * | 2014-12-19 | 2015-03-25 | 湖南明湘科技发展有限公司 | Cement-based nanocomposite material and preparation method thereof |
| CN107151118A (en) * | 2017-05-24 | 2017-09-12 | 广东信强混凝土有限公司 | A kind of refractory concrete |
Non-Patent Citations (1)
| Title |
|---|
| 郭志强: ""碳纳米管水泥基复合材料吸波性能研究"", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112390578A (en) * | 2020-11-16 | 2021-02-23 | 同济大学 | CNF reinforced steel slag-based geopolymer cementing material, forming body, preparation and application thereof |
| CN113060989A (en) * | 2021-03-25 | 2021-07-02 | 中国人民解放军空军工程大学 | A method for enhancing concrete resistance and electromagnetic shielding performance with nano-carbon fibers |
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