CN101935201B - Single-component high-performance mortar for repairing and reinforcing concrete - Google Patents

Single-component high-performance mortar for repairing and reinforcing concrete Download PDF

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Publication number
CN101935201B
CN101935201B CN200910087598A CN200910087598A CN101935201B CN 101935201 B CN101935201 B CN 101935201B CN 200910087598 A CN200910087598 A CN 200910087598A CN 200910087598 A CN200910087598 A CN 200910087598A CN 101935201 B CN101935201 B CN 101935201B
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CN
China
Prior art keywords
parts
single component
component mortar
mortar
latex powder
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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.)
Expired - Fee Related
Application number
CN200910087598A
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Chinese (zh)
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CN101935201A (en
Inventor
高汉青
邵正明
任恩平
于海洋
仲朝明
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Central Research Institute of Building and Construction Co Ltd MCC Group
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Central Research Institute of Building and Construction Co Ltd MCC Group
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Priority to CN200910087598A priority Critical patent/CN101935201B/en
Publication of CN101935201A publication Critical patent/CN101935201A/en
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Publication of CN101935201B publication Critical patent/CN101935201B/en
Expired - Fee Related legal-status Critical Current
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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
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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  • 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)

Abstract

The invention provides single-component t high-performance mortar for repairing and reinforcing concrete, which comprises the following components in part by mass: 200g of sand, 55 to 75 parts of ordinary portland cement, 10 to 30 parts of sulphate aluminium cement, 3 to 7 parts of siliceous dust, 8 to 12 parts of flyash, 0.18 to 0.22 part of water reducing agent, 2 to 4 parts of flexibilizer, 0.04 to 0.06 part of water-retaining agent, 1.0 to 2.0 parts of swelling agent and 0.1 to 0.2 part of polymer synthetic fiber. The single-component t high-performance mortar has the advantages of high initial strength, good adhesion, excellent cracking resistance, low ratio of compressive strength to flexural strength, excellent toughness, simple and convenient construction, single component, no toxin or smell, no harm to human bodies, and environmental protection without pollution.

Description

A kind of single component High Performance Mortar that can be used for the concrete repair reinforcing
Technical field
The invention belongs to building material technical field, be specifically related to a kind of single component, can be used for the High Performance Mortar that concrete repair is reinforced.
Background technology
All kinds of Infrastructure in the national product life such as the concrete materials that adopt such as Industrial buildings, harbour, bridge more.Because receive the influence of factors such as environment for use, natural disaster or construction quality, concrete material can produce problem in various degree, gently then honeycomb is damaged, influence is attractive in appearance; Heavy then bearing capacity not enough, potential safety hazard occurs, it is carried out effective repairing and reinforcing be significant.
Concrete repairing and reinforcing can adopt cement base class material and organic type of material.Because cement base class material and concrete foundation consistency are good, and cost performance is high, thereby is used more widely, but it still exists some shortcomings at present, and for example early strength is on the low side, causes the construction period long; Adhesiveproperties is poor, and construction back patching material combines weak with the concrete foundation interface, be prone to stripping damage; Resistance to cleavage is poor, and the construction post shrinkage can not get effective control, is prone to cracking and causes repairing to be lost efficacy; Folding strength is low, and toughness is not enough; Two-pack construction, emulsion modified cement base class patching material require the two-pack construction, and construction quality often is difficult to control.
Summary of the invention
The objective of the invention is to propose a kind of High Performance Mortar that has high early strength, high adhesion ability, high breaking strength, H.T., single component construction, anti-cracking performance excellence, can be applicable to concrete repair and reinforcing engineering.
The single component High Performance Mortar that can be used for the concrete repair reinforcing that the present invention proposes comprises that following each component reaches the content by mass fraction:
200 parts of sands
55～75 parts of ordinary Portland cements
10～30 parts of aluminosulfate cements
3～7 parts of silicon ashes
8～12 parts in flyash
0.18～0.22 part of water reducer
2～4 parts of toughner
0.04～0.06 part of water-holding agent
1.0～2.0 parts of swelling agents
0.1～0.2 part of Polymer Synthesizing fiber.
Among the present invention, said sand is good silica sand of 0～5mm grain composition or river sand; Said water reducer is the powdery polycarboxylate dehydragent good with the gelling material consistency; Said toughner is the redispersable latex powder good with the gelling material consistency; It can be esters of acrylic acid latex powder, ethylene vinyl acetate class latex powder, styrene-acrylate class latex powder etc., also can be the combination of the good multiple latex powder of consistency; Said water-holding agent is the ether of cellulose good with the gelling material consistency, and it can be methylcellulose gum, methylhydroxypropylcellulose, methyl hydroxyethylcellulose, Natvosol or Type 3U etc.; Said swelling agent is a microcapsule unslaked lime; Said Polymer Synthesizing fiber is polypropylene fibre or vinylon etc.
Preparing method of the present invention is: take by weighing various starting material by formula rate; In stirrer, add sand, ordinary Portland cement, aluminosulfate cement, silicon ash, flyash, water reducer, toughner, water-holding agent, swelling agent, Polymer Synthesizing fiber successively; Stir, form the mortar product.During construction, in mortar, add the water of 8%～10% (weight percent), stir and to use in 3～5 minutes.
The invention has the beneficial effects as follows: 1, have higher early strength, and can suitably adjust the gelling material ratio according to actual needs, be applicable to the repairing and the reinforcing of all kinds of engineerings.2, adhesiveproperties is good, and mortar combines very firm with concrete foundation, can not produce stripping damage at the common loading process that carries.3, resistance to cleavage is excellent, and the shrinking percentage of mortar has obtained effective control, and cracking can not appear in large-area construction.4, backfin is than low, tenacity excellent.5, easy construction, the single component construction, the working-yard only need add mix and can use.6, nontoxic, tasteless, harmless, environmental protection, free from environmental pollution.
Embodiment
Below in conjunction with specific embodiment technical scheme of the present invention is done further to describe.
Adjustment mortar prescription can obtain the Different products performance.Testing method is with reference to GB/T 2419-2005, DL/T5126-2001.
Embodiment 1
Choose sand 200kg, ordinary Portland cement 75kg, aluminosulfate cement 10kg, silicon ash 7kg, flyash 12kg, water reducer 0.22kg, toughner 2kg, water-holding agent 0.05kg, swelling agent 1.5kg, polypropylene fibre 0.15kg.In stirrer, add said components successively, stir, process High Performance Mortar 1.Mortar 1 and 29 parts of water mixs are obtained product 1, and performance is following:
Jumping table degree of mobilization (mm) 167
1d resistance to compression/folding strength (MPa) 20.5/4.7
28d resistance to compression/folding strength (MPa) 69.8/13.3
28d bonding strength (MPa) 2.8
The 28d backfin is than 5.2
60d shrinking percentage 390 * 10 -6
Embodiment 2
Choose sand 200kg, ordinary Portland cement 65kg, aluminosulfate cement 20kg, silicon ash 5kg, flyash 10kg, water reducer 0.2kg, toughner 3kg, water-holding agent 0.06kg, swelling agent 2.0kg, vinylon 0.1kg.In stirrer, add said components successively, stir, process High Performance Mortar 2.Mortar 2 and 29 parts of water mixs are obtained product 2, and performance is following:
Jumping table degree of mobilization (mm) 170
1d resistance to compression/folding strength (MPa) 24.6/5.8
28d resistance to compression/folding strength (MPa) 65.4/14.0
28d bonding strength (MPa) 3.1
The 28d backfin is than 4.7
60d shrinking percentage 362 * 10 -6
Embodiment 3
Choose sand 200kg, ordinary Portland cement 55kg, aluminosulfate cement 30kg, silicon ash 3kg, flyash 8kg, water reducer 0.18kg, toughner 4kg, water-holding agent 0.04kg, swelling agent 1.0kg, polypropylene fibre 0.2kg.In stirrer, add said components successively, stir, process High Performance Mortar 3.Mortar 3 and 29 parts of water mixs are obtained product 3, and product performance are following:
Jumping table degree of mobilization (mm) 165
1d resistance to compression/folding strength (MPa) 26.2/5.8
28d resistance to compression/folding strength (MPa) 60.7/13.6
28d bonding strength (MPa) 3.3
The 28d backfin is than 4.5
60d shrinking percentage 330 * 10 -6
Embodiment 4
Repeat embodiment 1; Said sand is the good silica sand of 0-5mm grain composition, and water reducer is the powdery polycarboxylate dehydragent good with the gelling material consistency, and toughner is ethylene vinyl acetate class latex powder; Water-holding agent is a methylcellulose gum, and swelling agent is a microcapsule unslaked lime.
Embodiment 5
Repeat embodiment 2; Said sand is the good river sand of 0～4mm grain composition, and water reducer is the powdery polycarboxylate dehydragent good with the gelling material consistency, and toughner is styrene-acrylate class latex powder; Water-holding agent is a methyl hydroxyethylcellulose, and swelling agent is a microcapsule unslaked lime.

Claims (9)

1. one kind can be used for the single component mortar that concrete repair is reinforced, and it is characterized in that, comprises that following each component reaches the content by mass fraction:
200 parts of sands
55～75 parts of ordinary Portland cements
10～30 parts of aluminosulfate cements
3～7 parts of silicon ashes
8～12 parts in flyash
0.18～0.22 part of water reducer
2～4 parts of toughner
0.04～0.06 part of water-holding agent
1.0～2.0 parts of swelling agents
0.1～0.2 part of Polymer Synthesizing fiber.
2. single component mortar as claimed in claim 1 is characterized in that, said sand is good silica sand of 0～5mm grain composition or river sand.
3. single component mortar as claimed in claim 1 is characterized in that, said water reducer is the powdery polycarboxylate dehydragent good with the gelling material consistency.
4. single component mortar as claimed in claim 1 is characterized in that, said toughner is the redispersable latex powder good with the gelling material consistency.
5. single component mortar as claimed in claim 4 is characterized in that, said redispersable latex powder is esters of acrylic acid latex powder, ethylene vinyl acetate class latex powder or styrene-acrylate class latex powder.
6. single component mortar as claimed in claim 1 is characterized in that, said water-holding agent is the ether of cellulose good with the gelling material consistency.
7. single component mortar as claimed in claim 6 is characterized in that, said ether of cellulose is methylcellulose gum, methylhydroxypropylcellulose, methyl hydroxyethylcellulose, Natvosol or Type 3U.
8. single component mortar as claimed in claim 1 is characterized in that, said swelling agent is a microcapsule unslaked lime.
9. like arbitrary described single component mortar among the claim 1-8, it is characterized in that said Polymer Synthesizing fiber is polypropylene fibre or vinylon.
CN200910087598A 2009-06-30 2009-06-30 Single-component high-performance mortar for repairing and reinforcing concrete Expired - Fee Related CN101935201B (en)

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Application Number Priority Date Filing Date Title
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