CN111320424A - Concrete structure repairing method based on carbonization hardening - Google Patents

Concrete structure repairing method based on carbonization hardening Download PDF

Info

Publication number
CN111320424A
CN111320424A CN202010047099.6A CN202010047099A CN111320424A CN 111320424 A CN111320424 A CN 111320424A CN 202010047099 A CN202010047099 A CN 202010047099A CN 111320424 A CN111320424 A CN 111320424A
Authority
CN
China
Prior art keywords
repairing
parts
carbonization
concrete structure
hardening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202010047099.6A
Other languages
Chinese (zh)
Other versions
CN111320424B (en
Inventor
王发洲
张秀贞
刘志超
何永佳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan University of Technology WUT
Original Assignee
Wuhan University of Technology WUT
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan University of Technology WUT filed Critical Wuhan University of Technology WUT
Priority to CN202010047099.6A priority Critical patent/CN111320424B/en
Publication of CN111320424A publication Critical patent/CN111320424A/en
Application granted granted Critical
Publication of CN111320424B publication Critical patent/CN111320424B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
    • 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
    • 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
    • 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
    • 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
    • C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

The invention discloses a concrete structure repairing method based on carbonization hardening, which comprises the following steps: cleaning an area needing repairing; filling or smearing repair materials; the repairing material comprises the following components in parts by weight: carbonizing the cementing material: 100 parts of a carbonization reinforcing agent: 1-10 parts of fine aggregate: 5-70 parts of a water reducing agent: 2-6 parts of water: 6-16 parts; sealing the area to be repaired by using a sealing device; and introducing carbon dioxide repairing gas into the closed to-be-repaired area. The invention is based on the principle of carbonization hardening, the strength of the repair material is developed quickly, the strength grade is high, and the repair material can be put into service quickly after being repaired; the volume of the repair material can generate micro-expansion in the carbonization process, and the repair material has excellent volume stability in the later service process, is tightly combined with a matrix, has strong cohesiveness and is not easy to fall off; the fluidity of the repair slurry can be designed and regulated, various processes of smearing, spraying and pouring are met, and the engineering applicability is strong.

Description

Concrete structure repairing method based on carbonization hardening
Technical Field
The invention belongs to the technical field of materials, and particularly relates to a concrete structure repairing method based on carbonization hardening.
Background
The building material mainly takes a cement-based material as a cementing part, and is influenced by physical action (temperature, humidity and the like), mechanical action (fatigue failure, abrasion and the like) and the like in the service process, and the phenomena of microcrack or surface layer material abrasion and falling can be inevitably generated. After cracks are generated or surface layer materials fall off, if the cracks are not repaired, harmful chemical substances such as sulfate ions, chloride ions and the like can invade the interior of the materials along the cracks and the like, the corrosion process is accelerated, the service life of the building materials is seriously influenced, and meanwhile, huge potential safety hazards exist.
The service life of the building material can be prolonged by regularly repairing the building material, the service safety of the building material is improved, and the building material has great economic benefit. The repair materials widely used at present are mainly quick-hardening hydraulic materials, the hydration and coagulation of the materials can be adjusted, and the strength development after repair is quicker; however, the system has the defects of high durability (particularly freezing resistance) and poor service performance (high water content, poor freezing resistance, high hydration hardening speed influenced by temperature, slow strength development at low temperature, volume shrinkage generated by hydration reaction to cause poor bonding with a substrate), obvious interface between a repair area and the substrate, and short repair period and high effective repair cost due to the fact that a weak area still exists in the later service process and is easy to damage again. Therefore, there is a limitation in the field of building material repair.
Disclosure of Invention
The invention aims to provide a concrete structure repairing method and a repairing material, wherein the used repairing material has adjustable and controllable flowability, so that various construction requirements are met; meanwhile, the used repair material takes carbonization reaction as a strength development mechanism, is slightly influenced by the environmental temperature, has quick strength development and high strength grade, and meets the requirement of quick repair service; the carbonization reaction is the micro-expansion characteristic, so that the close combination of the repair material and the matrix is ensured; the repairing material has compact matrix and low water content, the matrix composition is mainly calcium carbonate, and the repairing material has excellent durability such as frost resistance and the like, and is particularly suitable for repairing work in severe cold environments.
In order to achieve the purpose, the technical scheme is as follows:
a concrete structure repairing method based on carbonization hardening comprises the following steps:
1) cleaning an area needing repairing;
2) filling or smearing repair materials; the repairing material comprises the following components in parts by weight: carbonizing the cementing material: 100 parts of a carbonization reinforcing agent: 1-10 parts of fine aggregate: 5-70 parts of a water reducing agent: 2-6 parts of water: 6-16 parts;
3) sealing the area to be repaired by using a sealing device; and introducing carbon dioxide repairing gas into the closed to-be-repaired area.
According to the scheme, the carbonized cementing material is any one or mixture of gamma-type dicalcium silicate, monocalcium silicate, steel slag and tricalcium disilicate.
According to the scheme, the carbonization reinforcing agent is any one or mixture of polyvinyl alcohol, ethylene glycol and amorphous silica materials; the amorphous silica material is SiO2Silica fume with content not less than 94 wt%.
According to the scheme, the fine aggregate is quartz sand with the particle size distribution of 300-1100 mu m.
According to the scheme, the water reducing agent is a composite water reducing agent formed by mixing a polycarboxylic acid water reducing agent and a sodium citrate retarder.
According to the scheme, CO in the repair gas2The volume concentration is 10-99.8%.
According to the scheme, CO in the repair gas2The introducing time is 5min-30 min.
The invention discloses a concrete structure repairing material based on carbonization hardening and a repairing method, which have the following advantages:
(1) based on the principle of carbonization hardening, the strength of the repair material is developed quickly, the strength grade is high, and the repair material can be put into service quickly after being repaired;
(2) the volume of the repair material can generate micro-expansion in the carbonization process, and the repair material has excellent volume stability in the later service process, is tightly combined with a matrix, has strong cohesiveness and is not easy to fall off;
(3) the freezing and thawing durability is excellent, the moisture content in the carbonization hardening repairing material is low, the freezing resistance is excellent, the strength development is not influenced in a low-temperature environment, the frost cracking damage cannot occur, and the carbonization hardening repairing material is suitable for the fields of repairing high-speed railway track boards and the like;
(4) the fluidity of the repair slurry can be designed and regulated, various processes of smearing, spraying and pouring are met, and the engineering applicability is strong.
Detailed Description
The following examples further illustrate the technical solutions of the present invention, but should not be construed as limiting the scope of the present invention.
The amorphous siliceous material used in the following examples was SiO2Silica fume with content not less than 94 wt%; the fine aggregate is quartz sand with the particle size distribution of 300-1100 mu m; the water reducing agent is a compound water reducing agent (the mixing ratio is 14-18: 1) formed by mixing a polycarboxylic acid water reducing agent and a sodium citrate retarder.
Example 1:
repairing materials:
carbonizing the cementing material: steel slag: 90 parts, gamma-dicalcium silicate: 10 portions of
Carbonizing the reinforced material: amorphous siliceous material: 2 portions of
Fine aggregate: 5 portions of
Water reducing agent: 2 portions of
Water: 6 parts.
Repair gas CO2Concentration: 10 percent; time: and (3) 30 min.
Example 2:
repairing materials:
carbonizing the cementing material: calcium silicate: 25 parts of gamma-dicalcium silicate: 75 portions of
Carbonizing the reinforced material: 0 portion of
Fine aggregate: 20 portions of
Water reducing agent: 2 portions of
Water: 8 parts.
Repair gas CO2Concentration: 100 percent; time: 5min
Example 3:
repairing materials:
carbonizing the cementing material: steel slag: 70 parts of gamma-dicalcium silicate: 30 portions of
Carbonizing the reinforced material: polyvinyl alcohol: 6 portions of
Fine aggregate: 15 portions of
Water reducing agent: 4 portions of
Water: 12 parts.
Repair gas CO2Concentration: 50 percent; time: 30min
Example 4:
repairing materials:
carbonizing the cementing material: steel slag: 40 parts of monocalcium silicate: 60 portions of
Carbonizing the reinforced material: ethylene glycol: 5 portions of
Fine aggregate: 40 portions of
Water reducing agent: 6 portions of
Water: 16 parts of.
Repair gas CO2Concentration: 80 percent; time: 20min
Example 5:
repairing materials:
carbonizing the cementing material: steel slag: 50 parts, tricalcium disilicate: 50 portions of
Carbonizing the reinforced material: amorphous siliceous material: 3 portions of
Fine aggregate: 5 portions of
Water reducing agent: 3 portions of
Water: 10 parts.
Repair gas CO2Concentration: 30 percent; time: 50min
The test of the compressive strength refers to a cement mortar strength test method (GB/T17671-1999); the bonding strength test refers to a molded polyphenyl plate thin plaster exterior wall external thermal insulation system material (GB/T29906-2013).
TABLE 1 Strength of repair Material in the above examples
Item Example 1 Example 2 Example 3 Example 4 Example 5
Compressive strength MPa after carbonization 43 56 76 49 40
Adhesive strength MPa 2.8 4.2 4.0 3.5 3.0

Claims (7)

1. A concrete structure repairing method based on carbonization hardening is characterized by comprising the following steps:
1) cleaning an area needing repairing;
2) filling or smearing repair materials; the repairing material comprises the following components in parts by weight: carbonizing the cementing material: 100 parts of a carbonization reinforcing agent: 1-10 parts of fine aggregate: 5-70 parts of a water reducing agent: 2-6 parts of water: 6-16 parts;
3) sealing the area to be repaired by using a sealing device; and introducing carbon dioxide repairing gas into the closed to-be-repaired area.
2. The method for repairing a concrete structure based on carbonization hardening as claimed in claim 1, wherein the carbonized cementitious material is any one or a mixture of gamma-dicalcium silicate, monocalcium silicate, steel slag and tricalcium disilicate.
3. The method for repairing a concrete structure based on carbonization hardening as claimed in claim 1, wherein the carbonization enhancer is any one or a mixture of polyvinyl alcohol, ethylene glycol and amorphous silica materials; the amorphous silica material is SiO2Silica fume with content not less than 94 wt%.
4. The method for repairing a concrete structure based on carbonization hardening as claimed in claim 1, wherein the fine aggregate is quartz sand having a particle size distribution of 300-1100 μm.
5. The method for repairing a concrete structure based on carbonization hardening as claimed in claim 1, wherein the water-reducing agent is a compound water-reducing agent obtained by mixing a polycarboxylic acid water-reducing agent and a sodium citrate retarder.
6. The method for repairing a concrete structure based on carburization hardening according to claim 1, wherein said repairing gas contains CO2The volume concentration is 10-99.8%.
7. The method for repairing a concrete structure based on carburization hardening according to claim 1, wherein said repairing gas contains CO2The introducing time is 5min-30 min.
CN202010047099.6A 2020-01-16 2020-01-16 Concrete structure repairing method based on carbonization hardening Active CN111320424B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010047099.6A CN111320424B (en) 2020-01-16 2020-01-16 Concrete structure repairing method based on carbonization hardening

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010047099.6A CN111320424B (en) 2020-01-16 2020-01-16 Concrete structure repairing method based on carbonization hardening

Publications (2)

Publication Number Publication Date
CN111320424A true CN111320424A (en) 2020-06-23
CN111320424B CN111320424B (en) 2021-04-20

Family

ID=71163264

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010047099.6A Active CN111320424B (en) 2020-01-16 2020-01-16 Concrete structure repairing method based on carbonization hardening

Country Status (1)

Country Link
CN (1) CN111320424B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112062602A (en) * 2020-09-21 2020-12-11 保利长大工程有限公司 Carbonization curing method for two-lining concrete and construction method thereof
CN113045276A (en) * 2021-04-09 2021-06-29 四川铁创科技有限公司 Concrete for heat damage tunnel
CN113121192A (en) * 2021-05-08 2021-07-16 武汉理工大学 Calcium carbonate-based sand powder reinforced carbonized hardened body and preparation method thereof
CN113402243A (en) * 2021-06-23 2021-09-17 武汉理工大学 Method for improving durability of concrete product by using carbonized coating
CN113650132A (en) * 2021-08-19 2021-11-16 武汉理工大学 Artificial rock material suitable for negative temperature environment and preparation method thereof
CN114634333A (en) * 2022-03-29 2022-06-17 宁波中淳高科股份有限公司 Low-carbon concrete segment
CN116968176A (en) * 2023-09-22 2023-10-31 北京工业大学 Carbonization reinforcing method for cement-based material

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106082891A (en) * 2016-06-16 2016-11-09 济南大学 A kind of cement-base quick repairing ground surface material and preparation method thereof
CN109694224A (en) * 2018-12-19 2019-04-30 武汉理工大学 A kind of high perdurable concrete product of gradient-structure and preparation method thereof
US20190152858A1 (en) * 2017-11-21 2019-05-23 Holcim Technology Ltd Compositions and method to improve the aesthetics of calcium silicate-based cements and concretes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106082891A (en) * 2016-06-16 2016-11-09 济南大学 A kind of cement-base quick repairing ground surface material and preparation method thereof
US20190152858A1 (en) * 2017-11-21 2019-05-23 Holcim Technology Ltd Compositions and method to improve the aesthetics of calcium silicate-based cements and concretes
CN109694224A (en) * 2018-12-19 2019-04-30 武汉理工大学 A kind of high perdurable concrete product of gradient-structure and preparation method thereof

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
S.N.戈什: "《水泥技术进展》", 31 December 1986 *
姚燕 等: "《水泥与混凝土研究进展 第14届国际水泥化学大会论文综述》", 31 October 2016 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112062602A (en) * 2020-09-21 2020-12-11 保利长大工程有限公司 Carbonization curing method for two-lining concrete and construction method thereof
CN113045276A (en) * 2021-04-09 2021-06-29 四川铁创科技有限公司 Concrete for heat damage tunnel
CN113045276B (en) * 2021-04-09 2022-12-16 四川铁拓科技有限公司 Concrete for heat damage tunnel
CN113121192A (en) * 2021-05-08 2021-07-16 武汉理工大学 Calcium carbonate-based sand powder reinforced carbonized hardened body and preparation method thereof
CN113402243A (en) * 2021-06-23 2021-09-17 武汉理工大学 Method for improving durability of concrete product by using carbonized coating
CN113650132A (en) * 2021-08-19 2021-11-16 武汉理工大学 Artificial rock material suitable for negative temperature environment and preparation method thereof
CN114634333A (en) * 2022-03-29 2022-06-17 宁波中淳高科股份有限公司 Low-carbon concrete segment
CN116968176A (en) * 2023-09-22 2023-10-31 北京工业大学 Carbonization reinforcing method for cement-based material
CN116968176B (en) * 2023-09-22 2024-01-05 北京工业大学 Carbonization reinforcing method for cement-based material

Also Published As

Publication number Publication date
CN111320424B (en) 2021-04-20

Similar Documents

Publication Publication Date Title
CN111320424B (en) Concrete structure repairing method based on carbonization hardening
CN110256023B (en) Anti-freezing, anti-permeability and anti-cracking concrete and preparation method thereof
KR101681596B1 (en) Mortar composition of improving chemical resistance and durability for repairing and reinforcing concrete structures , and method of repairing and reinforcing concrete structures using the same
KR101952152B1 (en) Quick-hardening polymer cement concrete composition having improved flexural toughness and durability and repairing method for road pavement therewith
KR101923552B1 (en) Road pavement composition of very early strength repairing method thereof
KR101720504B1 (en) A high early strength cement concrete composition having the improved durability for road pavement and a repairing method of road pavement using the same
KR101809485B1 (en) Ultra rapid harding,high early strength waterproof and mothproof mortar composition
CN110746165A (en) Ocean engineering repair mortar and preparation method thereof
KR101956631B1 (en) Quick-hardening cement concrete composition for repairing road and road repairing method therewith
KR101135175B1 (en) Protective mortar using calcium aluminate and oraganic-inorganic hybrid coating agent
CN110950616B (en) Grouting material for low-temperature steel bar sleeve connection and preparation method and application thereof
KR101363857B1 (en) A high-early strength type cement concrete composition for bridge pavement using high-early strength type mixed cement binder and method of bridge pavement using the same
CN112919864A (en) Recycled aggregate fiber reinforced shotcrete and preparation method thereof
KR100879882B1 (en) Restoring concrete structures by using strengthening agency, eco-friendly repair mortar and epoxy paint
CN110483000B (en) Interface agent for repairing masonry structure and preparation method and application thereof
CN102503214B (en) WHDF type concrete inorganic crack-resisting permeability-educing agent
CN115057670A (en) Fast-hardening high-ductility inorganic sealing mortar
KR102364379B1 (en) Crack reducing chemical resistance mortar composition having excellent workability and repairing and reinforcing method using the same
KR101893015B1 (en) Mortar composition for repairing section of reinforced concrete structures damaged in section and method for repairing section of reinforced concrete structures using the same
CN113929404A (en) Building repair reinforcing mortar
Zhang et al. Mechanical Properties and Durability of Sustainable Concrete Manufactured Using Ceramic Waste: A Review.
CN113354382A (en) Acid corrosion resistant repair mortar and preparation method thereof
CN110590298B (en) Acid rain freezing-resistant repair material for concrete structure of rail transit engineering
CN111848068A (en) Rapid repair mortar for horizontal surface defects and preparation method thereof
KR20150047927A (en) High strength mortar composition and manufacturing method using the same

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant