CN113461390A - Cement-based rapid repairing material and construction process thereof - Google Patents
Cement-based rapid repairing material and construction process thereof Download PDFInfo
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- CN113461390A CN113461390A CN202110883462.2A CN202110883462A CN113461390A CN 113461390 A CN113461390 A CN 113461390A CN 202110883462 A CN202110883462 A CN 202110883462A CN 113461390 A CN113461390 A CN 113461390A
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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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- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/12—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor
- E01C23/122—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor with power-driven tools, e.g. oscillated hammer apparatus
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/10—Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
- E01C7/14—Concrete paving
- E01C7/142—Mixtures or their components, e.g. aggregate
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/10—Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
- E01C7/14—Concrete paving
- E01C7/147—Repairing concrete pavings, e.g. joining cracked road sections by dowels, applying a new concrete covering
-
- 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
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
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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
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of cement-based inorganic materials, in particular to a cement-based rapid repairing material and a construction process thereof; the composition comprises the following raw materials in parts by weight: 60-80 parts of portland cement, 20-28 parts of Secar71 cement, 14-25 parts of quartz sand, 2-5 parts of bone glue, 1.2-2.0 parts of polypropylene fiber, 1.5-2.5 parts of basalt fiber, 25-35 parts of mixed filler, 0.03-0.06 part of water-retaining agent, 1.2-1.8 parts of function reinforcing agent, 0.6-1.2 parts of water reducing agent, 0.5-0.8 part of compound exciting agent, 0.6-0.9 part of organic silicon defoaming agent, 0.4-1.0 part of retarder and 20-30 parts of water; the cement-based rapid repairing material provided by the invention can accelerate the hydration speed of cement, promote the early strength of concrete and effectively improve the early strength of concrete; moreover, the early strength, the density and the freezing resistance of the repairing material can be effectively enhanced; effectively improves the quality of the patching material.
Description
Technical Field
The invention relates to the technical field of cement-based inorganic materials, in particular to a cement-based rapid repairing material and a construction process thereof.
Background
Road maintenance is the maintenance of roads. The road and the structures and facilities on the road are maintained, the service performance of the road is maintained as much as possible, the damaged part is recovered in time, the driving safety, comfort and smoothness are ensured, and the transportation cost and time are saved; correct technical measures are adopted, the engineering quality is improved, the service life of the road is prolonged, and the reconstruction time is delayed.
The maintenance of roads has always been one of the important subjects in the field of road engineering, wherein cement concrete pavements are a more important pavement structure form in road construction in China. However, as time goes on, many cement concrete roads are very seriously broken and cracked, and at the cracked position, the damage of the road surface is increased continuously due to the erosion of rainwater, and the cost of excavation and reconstruction is very high, so the damaged road surface must be repaired.
Although the existing cement-based rapid repairing material can perform certain repairing effect on damaged roads, wall surfaces or concrete structures of high-speed rail structures, the mechanical property of the existing cement-based rapid repairing material is relatively poor, so that the repairing effect is not very ideal, and the repairing quality is influenced. Based on the above, the invention provides a cement-based rapid repair material and a construction process thereof, which aim to solve the problems.
Disclosure of Invention
The invention aims to provide a cement-based rapid repair material and a construction process thereof. Moreover, the early strength, the density and the freezing resistance of the repairing material can be effectively enhanced; effectively improves the quality of the patching material.
In order to achieve the purpose, the invention provides the following technical scheme:
the cement-based rapid repair material comprises the following raw materials in parts by weight: 60-80 parts of portland cement, 20-28 parts of Secar71 cement, 14-25 parts of quartz sand, 2-5 parts of bone glue, 1.2-2.0 parts of polypropylene fiber, 1.5-2.5 parts of basalt fiber, 25-35 parts of mixed filler, 0.03-0.06 part of water-retaining agent, 1.2-1.8 parts of function reinforcing agent, 0.6-1.2 parts of water reducing agent, 0.5-0.8 part of compound exciting agent, 0.6-0.9 part of organic silicon defoaming agent, 0.4-1.0 part of retarder and 20-30 parts of water.
Furthermore, the mixed filler is prepared by respectively crushing and grinding 15-25 parts by weight of micro silicon powder, 30-40 parts by weight of slag powder, 5-8 parts by weight of nano calcium carbonate and 20-30 parts by weight of limestone into micro powder with the particle size of 300-400 meshes and then mechanically mixing the micro powder and the nano calcium carbonate.
Furthermore, the water-retaining agent is any one of hydroxypropyl methyl cellulose and hydroxyethyl methyl cellulose.
Further, the preparation method of the function enhancer comprises the following steps:
weighing 10-15 parts of potassium sulfate, 15-20 parts of high-calcium fly ash, 40-55 parts of red mud, 5-8 parts of celestite powder, 4-8 parts of calcium formate, 7-12 parts of sodium citrate, 3-6 parts of an inorganic additive and 8-15 parts of sepiolite; then respectively transferring the high-calcium fly ash, the red mud, the celestite powder inorganic additive and the sepiolite into a dryer for drying treatment;
II, putting the dried raw materials and the rest raw materials into a ball mill for ball milling treatment, so that the raw materials are ball milled into micro powder with the particle size of 3-8 mu m; then, respectively storing the obtained raw material micro powder for later use;
III, mechanically mixing the raw materials uniformly, and then performing dry pressing molding and demolding treatment on the obtained mixed powder by using a stainless steel mold; pressing the mixed powder into a cylindrical mixed material with the diameter of 1-2 cm and the height of 1-2 cm; mixing the obtained cylinders, transferring the mixture into a calcining furnace, and carrying out high-temperature calcining treatment at the temperature of 700-1000 ℃ for 40-60 min;
IV, taking out the cylindrical mixed material after the calcination is finished, and then rapidly cooling the cylindrical mixed material to 30-50 ℃; ball-milling the cooled cylindrical mixed material until the specific surface area is 250-300 m2And/kg, obtaining the finished product of the functional reinforcing agent.
Furthermore, the inorganic additive is prepared from rectorite and smectite according to the mass ratio of 1.5-2.5: 1 are mixed to prepare the medicine.
Furthermore, the water reducing agent is any one of polycarboxylic acid, melamine or naphthalene water reducing agents.
Furthermore, the compound excitant is prepared from sodium silicate, phosphogypsum and calcium nitrate according to a mass ratio of 1: 2.0-3.2: 1.5-2.5.
Furthermore, the retarder is any one of potassium sodium tartrate, tartaric acid and citric acid.
A construction process of a cement-based rapid repairing material comprises the following steps:
firstly, base layer processing;
firstly, cleaning a large-area base layer by using a milling machine; the specific operation is as follows: chiseling concrete of the part which is not firmly cemented to a compact part, and cleaning the surface; if the defect is serious, the defect surface is cut off; if the steel bars at the defect position rust, derusting the rusted steel bars; so that the surface of the treated concrete keeps clean and firm;
secondly, interface processing;
before repairing, the surface to be repaired of the substrate is sprayed with water and moistened without open water; after the repair surface is dried, coating an interface agent on the surface of the repair surface;
thirdly, repairing material construction;
the cement-based rapid repairing material is poured compactly, the repaired surface is kept flush with the original structure surface, and the construction of the cement-based material is completed before initial setting; construction is carried out until the designed elevation is required to be leveled and the folded surface is finished, and surface grooving treatment can be carried out when engineering needs;
wherein, when plane restoration is carried out, segregation and bleeding do not exist after pouring; for the restoration of a vertical face, an elevation face or a slope, the consistency of the cement-based rapid repairing material is determined according to construction requirements and a construction process mode, and a template is erected if necessary.
Furthermore, in the base layer processing procedure, for road engineering, the side line of the graph of the cutting area is parallel to or perpendicular to the center line of the road, the smooth surface in the cutting surface is subjected to roughening treatment, the cleaning depth of the crack position is not less than 30mm, and the width of each side is not less than 30 mm.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention takes potassium sulfate, high calcium fly ash, red mud, celestite powder, calcium formate, sodium citrate, inorganic additive and sepiolite as raw materials, and the prepared functional reinforcing agent can not only accelerate the hydration speed of cement, but also promote the early strength of concrete. Effectively improving the early strength of the concrete. Moreover, the compound activator is matched for use, can be mutually excited during hydration,react with each other to form a large amount of columnar ettringite, lamellar Ca (OH)2Crystalline and network, fibrous hydrated CSH gels. These products fill each other and intertwine with each other to firmly bond the set cement, so that the strength of the cement and the patching material is greatly improved.
2. The micro silicon powder, the slag powder, the nano calcium carbonate and the limestone are used as raw materials, and the prepared mixed filler is used as a cement-based rapid repair material, so that the early strength, the compactness and the freezing resistance of the repair material can be effectively enhanced. In addition, the polypropylene fiber and the basalt fiber are used in a matched manner, so that the compressive strength of the prepared repairing material is improved to a great extent. Effectively improves the quality of the patching material.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The cement-based rapid repair material comprises the following raw materials in parts by weight: 60 parts of portland cement, 20 parts of Secar71 cement, 14 parts of quartz sand, 2 parts of bone glue, 1.2 parts of polypropylene fiber, 1.5 parts of basalt fiber, 25 parts of mixed filler, 0.03 part of water-retaining agent, 1.2 parts of functional reinforcing agent, 0.6 part of water reducing agent, 0.5 part of compound exciting agent, 0.6 part of organic silicon defoaming agent, 0.4 part of retarder and 20 parts of water.
The mixed filler is prepared by crushing and grinding 15 parts of micro silicon powder, 30 parts of slag powder, 5 parts of nano calcium carbonate and 20 parts of limestone to form micro powder with the particle size of 300 meshes and then mechanically mixing the micro powder and the nano calcium carbonate.
The water-retaining agent is hydroxypropyl methyl cellulose.
The preparation method of the function reinforcing agent comprises the following steps:
weighing 10 parts of potassium sulfate, 15 parts of high-calcium fly ash, 40 parts of red mud, 5 parts of celestite powder, 4 parts of calcium formate, 7 parts of sodium citrate, 3 parts of inorganic additive and 8 parts of sepiolite; then respectively transferring the high-calcium fly ash, the red mud, the celestite powder inorganic additive and the sepiolite into a dryer for drying treatment;
II, putting the dried raw materials and the rest raw materials into a ball mill for ball milling treatment, and ball milling the raw materials to form micro powder with the particle size of 3 mu m; then, respectively storing the obtained raw material micro powder for later use;
III, mechanically mixing the raw materials uniformly, and then performing dry pressing molding and demolding treatment on the obtained mixed powder by using a stainless steel mold; pressing the mixed powder into a cylindrical mixed material with the diameter of 1cm and the height of 1 cm; mixing the obtained cylinders, transferring into a calcining furnace, and performing high-temperature calcining treatment at 700 ℃ for 40 min;
IV, taking out the cylindrical mixed material after the calcination is finished, and then rapidly cooling the cylindrical mixed material to 30 ℃; ball-milling the cooled cylindrical mixed material until the specific surface area is 250m2And/kg, obtaining the finished product of the functional reinforcing agent.
The inorganic additive is prepared from rectorite and smectite according to the mass ratio of 1.5: 1 are mixed to prepare the medicine.
The water reducing agent is selected from polycarboxylic acid water reducing agents.
The compound excitant is prepared from sodium silicate, phosphogypsum and calcium nitrate according to the mass ratio of 1: 2.0: 1.5 mixing and preparing.
The retarder is potassium sodium tartrate.
A construction process of a cement-based rapid repairing material comprises the following steps:
firstly, base layer processing;
firstly, cleaning a large-area base layer by using a milling machine; the specific operation is as follows: chiseling concrete of the part which is not firmly cemented to a compact part, and cleaning the surface; if the defect is serious, the defect surface is cut off; if the steel bars at the defect position rust, derusting the rusted steel bars; so that the surface of the treated concrete keeps clean and firm;
secondly, interface processing;
before repairing, the surface to be repaired of the substrate is sprayed with water and moistened without open water; after the repair surface is dried, coating an interface agent on the surface of the repair surface;
thirdly, repairing material construction;
the cement-based rapid repairing material is poured compactly, the repaired surface is kept flush with the original structure surface, and the construction of the cement-based material is completed before initial setting; construction is carried out until the designed elevation is required to be leveled and the folded surface is finished, and surface grooving treatment can be carried out when engineering needs;
wherein, when plane restoration is carried out, segregation and bleeding do not exist after pouring; for the restoration of a vertical face, an elevation face or a slope, the consistency of the cement-based rapid repairing material is determined according to construction requirements and a construction process mode, and a template is erected if necessary.
In the basic layer processing procedure, for road engineering, the graph sideline of the cutting area is parallel or vertical to the central line of the road, the smooth surface in the cutting surface is subjected to scabbling treatment, the cleaning depth of the crack position is not less than 30mm, and the width of each side is not less than 30 mm.
Example 2
The cement-based rapid repair material comprises the following raw materials in parts by weight: 70 parts of portland cement, 25 parts of Secar71 cement, 20 parts of quartz sand, 3 parts of bone glue, 1.6 parts of polypropylene fiber, 2.0 parts of basalt fiber, 30 parts of mixed filler, 0.05 part of water-retaining agent, 1.4 parts of functional reinforcing agent, 0.9 part of water reducing agent, 0.6 part of compound exciting agent, 0.7 part of organic silicon defoaming agent, 0.8 part of retarder and 25 parts of water.
The mixed filler is prepared by 20 parts of micro silicon powder, 35 parts of slag powder, 5 parts of nano calcium carbonate and 25 parts of limestone by weight through crushing, grinding to form micro powder with the particle size of 350 meshes and then mechanically mixing.
The water-retaining agent is hydroxyethyl methyl cellulose.
The preparation method of the function reinforcing agent comprises the following steps:
weighing 12 parts of potassium sulfate, 18 parts of high-calcium fly ash, 45 parts of red mud, 6 parts of celestite powder, 5 parts of calcium formate, 8 parts of sodium citrate, 4 parts of inorganic additive and 10 parts of sepiolite; then respectively transferring the high-calcium fly ash, the red mud, the celestite powder inorganic additive and the sepiolite into a dryer for drying treatment;
II, putting the dried raw materials and the rest raw materials into a ball mill for ball milling treatment, and ball milling the raw materials to form micro powder with the particle size of 5 mu m; then, respectively storing the obtained raw material micro powder for later use;
III, mechanically mixing the raw materials uniformly, and then performing dry pressing molding and demolding treatment on the obtained mixed powder by using a stainless steel mold; pressing the mixed powder into a cylindrical mixed material with the diameter of 1.5cm and the height of 1.5 cm; mixing the obtained cylinders, transferring into a calcining furnace, and performing high-temperature calcining treatment at 850 ℃ for 50 min;
IV, taking out the cylindrical mixed material after the calcination is finished, and then rapidly cooling the cylindrical mixed material to 40 ℃; ball-milling the cooled cylindrical mixed material until the specific surface area is 280m2And/kg, obtaining the finished product of the functional reinforcing agent.
The inorganic additive is prepared from rectorite and smectite according to the mass ratio of 2.0: 1 are mixed to prepare the medicine.
The water reducing agent is melamine water reducing agent.
The compound excitant is prepared from sodium silicate, phosphogypsum and calcium nitrate according to the mass ratio of 1: 2.5: 2.0 are mixed to prepare the medicine.
The retarder is tartaric acid.
A construction process of a cement-based rapid repairing material comprises the following steps:
firstly, base layer processing;
firstly, cleaning a large-area base layer by using a milling machine; the specific operation is as follows: chiseling concrete of the part which is not firmly cemented to a compact part, and cleaning the surface; if the defect is serious, the defect surface is cut off; if the steel bars at the defect position rust, derusting the rusted steel bars; so that the surface of the treated concrete keeps clean and firm;
secondly, interface processing;
before repairing, the surface to be repaired of the substrate is sprayed with water and moistened without open water; after the repair surface is dried, coating an interface agent on the surface of the repair surface;
thirdly, repairing material construction;
the cement-based rapid repairing material is poured compactly, the repaired surface is kept flush with the original structure surface, and the construction of the cement-based material is completed before initial setting; construction is carried out until the designed elevation is required to be leveled and the folded surface is finished, and surface grooving treatment can be carried out when engineering needs;
wherein, when plane restoration is carried out, segregation and bleeding do not exist after pouring; for the restoration of a vertical face, an elevation face or a slope, the consistency of the cement-based rapid repairing material is determined according to construction requirements and a construction process mode, and a template is erected if necessary.
In the basic layer processing procedure, for road engineering, the graph sideline of the cutting area is parallel or vertical to the central line of the road, the smooth surface in the cutting surface is subjected to scabbling treatment, the cleaning depth of the crack position is not less than 30mm, and the width of each side is not less than 30 mm.
Example 3
The cement-based rapid repair material comprises the following raw materials in parts by weight: 80 parts of portland cement, 28 parts of Secar71 cement, 25 parts of quartz sand, 5 parts of bone glue, 2.0 parts of polypropylene fiber, 2.5 parts of basalt fiber, 35 parts of mixed filler, 0.06 part of water-retaining agent, 1.8 parts of functional reinforcing agent, 1.2 parts of water reducing agent, 0.8 part of compound exciting agent, 0.9 part of organic silicon defoaming agent, 1.0 part of retarder and 30 parts of water.
The mixed filler is prepared by grinding 25 parts of micro silicon powder, 40 parts of slag powder, 8 parts of nano calcium carbonate and 30 parts of limestone by weight to obtain micro powder with the particle size of 400 meshes, and then mechanically mixing.
The water-retaining agent is hydroxypropyl methyl cellulose.
The preparation method of the function reinforcing agent comprises the following steps:
weighing 15 parts of potassium sulfate, 20 parts of high-calcium fly ash, 55 parts of red mud, 8 parts of celestite powder, 8 parts of calcium formate, 12 parts of sodium citrate, 6 parts of inorganic additive and 15 parts of sepiolite; then respectively transferring the high-calcium fly ash, the red mud, the celestite powder inorganic additive and the sepiolite into a dryer for drying treatment;
II, putting the dried raw materials and the rest raw materials into a ball mill for ball milling treatment, and ball milling the raw materials to form micro powder with the particle size of 8 mu m; then, respectively storing the obtained raw material micro powder for later use;
III, mechanically mixing the raw materials uniformly, and then performing dry pressing molding and demolding treatment on the obtained mixed powder by using a stainless steel mold; pressing the mixed powder into a cylindrical mixed material with the diameter of 2cm and the height of 2 cm; mixing the obtained cylinders, transferring into a calcining furnace, and performing high-temperature calcining treatment at 1000 ℃ for 60 min;
IV, taking out the cylindrical mixed material after the calcination is finished, and then rapidly cooling the cylindrical mixed material to 40 ℃; ball-milling the cooled cylindrical mixed material until the specific surface area is 300m2And/kg, obtaining the finished product of the functional reinforcing agent.
The inorganic additive is prepared from rectorite and smectite according to the mass ratio of 2.5: 1 are mixed to prepare the medicine.
The water reducing agent is a naphthalene water reducing agent.
The compound excitant is prepared from sodium silicate, phosphogypsum and calcium nitrate according to the mass ratio of 1: 3.2: 2.5 mixing and preparing.
The retarder is citric acid.
A construction process of a cement-based rapid repairing material comprises the following steps:
firstly, base layer processing;
firstly, cleaning a large-area base layer by using a milling machine; the specific operation is as follows: chiseling concrete of the part which is not firmly cemented to a compact part, and cleaning the surface; if the defect is serious, the defect surface is cut off; if the steel bars at the defect position rust, derusting the rusted steel bars; so that the surface of the treated concrete keeps clean and firm;
secondly, interface processing;
before repairing, the surface to be repaired of the substrate is sprayed with water and moistened without open water; after the repair surface is dried, coating an interface agent on the surface of the repair surface;
thirdly, repairing material construction;
the cement-based rapid repairing material is poured compactly, the repaired surface is kept flush with the original structure surface, and the construction of the cement-based material is completed before initial setting; construction is carried out until the designed elevation is required to be leveled and the folded surface is finished, and surface grooving treatment can be carried out when engineering needs;
wherein, when plane restoration is carried out, segregation and bleeding do not exist after pouring; for the restoration of a vertical face, an elevation face or a slope, the consistency of the cement-based rapid repairing material is determined according to construction requirements and a construction process mode, and a template is erected if necessary.
In the basic layer processing procedure, for road engineering, the graph sideline of the cutting area is parallel or vertical to the central line of the road, the smooth surface in the cutting surface is subjected to scabbling treatment, the cleaning depth of the crack position is not less than 30mm, and the width of each side is not less than 30 mm.
Comparative example 1: the cement-based rapid repair material provided by the embodiment is different from the cement-based rapid repair material provided by the embodiment 1 in that the raw materials do not contain mixed filler;
comparative example 2: the cement-based rapid repair material provided by the embodiment is different from the cement-based rapid repair material provided by the embodiment 1 in that the raw materials do not contain a mixed filler function reinforcing agent;
performance testing
The cement-based rapid repair materials prepared in examples 1 to 3 of the present invention were referred to as experimental examples 1 to 3; then, the performance of the cement-based rapid repair materials provided in the examples 1 to 3 and the comparative examples 1 to 2 is detected, and each set of obtained test data is recorded in the following table 1:
table 1: performance requirements of cement-based rapid repair materials
Table 2: mechanical property test of cement-based rapid repair material
As can be seen from the relevant data in tables 1 and 2, the cement-based rapid repair material provided by the invention can not only accelerate the hydration speed of cement, but also promote the early strength of concrete, thereby effectively improving the early strength of concrete. Moreover, the early strength, the density and the freezing resistance of the repairing material can be effectively enhanced; effectively improves the quality of the patching material. Therefore, the cement-based rapid repair material product produced by the invention has wider market prospect and is more suitable for popularization.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. The cement-based rapid repair material is characterized by comprising the following raw materials in parts by weight: 60-80 parts of portland cement, 20-28 parts of Secar71 cement, 14-25 parts of quartz sand, 2-5 parts of bone glue, 1.2-2.0 parts of polypropylene fiber, 1.5-2.5 parts of basalt fiber, 25-35 parts of mixed filler, 0.03-0.06 part of water-retaining agent, 1.2-1.8 parts of function reinforcing agent, 0.6-1.2 parts of water reducing agent, 0.5-0.8 part of compound exciting agent, 0.6-0.9 part of organic silicon defoaming agent, 0.4-1.0 part of retarder and 20-30 parts of water.
2. The cement-based rapid repair material according to claim 1, wherein: the mixed filler is prepared by grinding and grinding 15-25 parts by weight of micro silicon powder, 30-40 parts by weight of slag powder, 5-8 parts by weight of nano calcium carbonate and 20-30 parts by weight of limestone into micro powder with the particle size of 300-400 meshes and then mechanically mixing the micro powder and the nano calcium carbonate.
3. The cement-based rapid repair material according to claim 1, wherein: the water-retaining agent is any one of hydroxypropyl methyl cellulose and hydroxyethyl methyl cellulose.
4. The cement-based rapid repair material according to claim 1, wherein: the preparation method of the function enhancer comprises the following steps:
weighing 10-15 parts of potassium sulfate, 15-20 parts of high-calcium fly ash, 40-55 parts of red mud, 5-8 parts of celestite powder, 4-8 parts of calcium formate, 7-12 parts of sodium citrate, 3-6 parts of an inorganic additive and 8-15 parts of sepiolite; then respectively transferring the high-calcium fly ash, the red mud, the celestite powder inorganic additive and the sepiolite into a dryer for drying treatment;
II, putting the dried raw materials and the rest raw materials into a ball mill for ball milling treatment, so that the raw materials are ball milled into micro powder with the particle size of 3-8 mu m; then, respectively storing the obtained raw material micro powder for later use;
III, mechanically mixing the raw materials uniformly, and then performing dry pressing molding and demolding treatment on the obtained mixed powder by using a stainless steel mold; pressing the mixed powder into a cylindrical mixed material with the diameter of 1-2 cm and the height of 1-2 cm; mixing the obtained cylinders, transferring the mixture into a calcining furnace, and carrying out high-temperature calcining treatment at the temperature of 700-1000 ℃ for 40-60 min;
IV, after the calcination is finishedTaking out the cylindrical mixed material, and rapidly cooling the cylindrical mixed material to 30-50 ℃; ball-milling the cooled cylindrical mixed material until the specific surface area is 250-300 m2And/kg, obtaining the finished product of the functional reinforcing agent.
5. The cement-based rapid repair material according to claim 4, wherein: the inorganic additive is prepared from rectorite and smectite according to the mass ratio of 1.5-2.5: 1 are mixed to prepare the medicine.
6. The cement-based rapid repair material according to claim 1, wherein: the water reducing agent is any one of polycarboxylic acid, melamine or naphthalene water reducing agents.
7. The cement-based rapid repair material according to claim 1, wherein: the compound excitant is prepared from sodium silicate, phosphogypsum and calcium nitrate according to a mass ratio of 1: 2.0-3.2: 1.5-2.5.
8. The cement-based rapid repair material according to claim 1, wherein: the retarder is any one of potassium sodium tartrate, tartaric acid and citric acid.
9. The construction process of the cement-based rapid repair material according to claim 1, characterized by comprising the following steps:
firstly, base layer processing;
firstly, cleaning a large-area base layer by using a milling machine; the specific operation is as follows: chiseling concrete of the part which is not firmly cemented to a compact part, and cleaning the surface; if the defect is serious, the defect surface is cut off; if the steel bars at the defect position rust, derusting the rusted steel bars; so that the surface of the treated concrete keeps clean and firm;
secondly, interface processing;
before repairing, the surface to be repaired of the substrate is sprayed with water and moistened without open water; after the repair surface is dried, coating an interface agent on the surface of the repair surface;
thirdly, repairing material construction;
the cement-based rapid repairing material is poured compactly, the repaired surface is kept flush with the original structure surface, and the construction of the cement-based material is completed before initial setting; construction is carried out until the designed elevation is required to be leveled and the folded surface is finished, and surface grooving treatment can be carried out when engineering needs;
wherein, when plane restoration is carried out, segregation and bleeding do not exist after pouring; for the restoration of a vertical face, an elevation face or a slope, the consistency of the cement-based rapid repairing material is determined according to construction requirements and a construction process mode, and a template is erected if necessary.
10. The construction process of the cement-based rapid repair material according to claim 9, wherein: in the basic layer processing procedure, for road engineering, the graph side line of the cutting area is parallel or vertical to the central line of the road, the smooth surface in the cutting surface is subjected to scabbling treatment, the cleaning depth of the crack position is not less than 30mm, and the width of each side is not less than 30 mm.
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