CN105948579B - A kind of water proofing property ECC and carbon cloth composite consolidation material and its application method - Google Patents
A kind of water proofing property ECC and carbon cloth composite consolidation material and its application method Download PDFInfo
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- CN105948579B CN105948579B CN201610270418.3A CN201610270418A CN105948579B CN 105948579 B CN105948579 B CN 105948579B CN 201610270418 A CN201610270418 A CN 201610270418A CN 105948579 B CN105948579 B CN 105948579B
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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
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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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
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
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Abstract
The present invention provides a kind of water proofing property ECC and carbon cloth composite consolidation material and its application method, including：Add ECC, the carbon cloth of additive；The ECC raw materials include cement, one-level flyash, silica sand, thickener, water reducer, water, PVA fibers；The additive includes：Hydrophobic material, volume are 0.01% the 0.1% of cement quality；Hydrophobic nano level mineral material, volume are 0.5% the 1.5% of cement quality.Both carbon cloth can have been avoided to come unglued failure, and can enough prevents the crack of the Reinforced Concrete Members with Flexure such as external water Yan Liang, plate from invading, and protects internal reinforcing bar from the water proofing property ECC and carbon cloth composite consolidation material and its application method of corrosion.Step is simple and convenient to operate, is practical.
Description
Technical field
The invention belongs to field of civil engineering, more particularly to a kind of water proofing property ECC and carbon cloth composite consolidation material and
Its application method.
Background technology
In field of civil engineering, the Reinforced Concrete Members with Flexure such as the beam of building (espespecially house, bridge etc.), plate, by
In the factor such as structure aging or upper load increase, Lack of support is shown, or even by bent face concrete cracking.From economy
Angle and construction complexity consider, typically will not directly change flexural member in engineering, but take certain reinforcing to arrange
Apply.At present frequently with Enlargement of Section, bonding steel plate method or affixing carbon fabric method in engineering.Wherein affixing carbon fabric
Method, because speed of application is fast, the advantages that not changing constructional appearance, and do not increase dead load substantially, there is very high engineering
Practical value.But the firm sex chromosome mosaicism of affixing carbon fabric is never solved well, the amount of deflection of flexural member increases
When big, often there is phenomenon of coming unglued, cause carbon cloth to fail.Meanwhile carbon cloth also has the shortcomings that being afraid of naked light, being afraid of to hit.Separately
Outside, carbon cloth can not effectively cover caused crack after flexural member cracking, invade with can not preventing external water, prevent not
The corrosion of reinforcing bar inside flexural member.
ECC (Engineered Cementitious Composites, high ductility fiber reinforced cement-based composite material,
Abbreviation ECC) as a kind of concrete material with certain strain-hardening property, itself has higher adaptability to changes, can
For reinforcing the Reinforced Concrete Members with Flexure of Lack of support.But ECC costs are very high, directly ECC is used as by curved structure
The reinforcement material of part is uneconomic.
The content of the invention
The purpose of the present invention is exactly to solve the above problems, there is provided a kind of both to have avoided carbon cloth from coming unglued mistake
Effect, and can enough prevent the crack of the Reinforced Concrete Members with Flexure such as external water Yan Liang, plate from invading, protect internal reinforcing bar from corrosion
Water proofing property ECC and carbon cloth composite consolidation material and its application method.
Existing ECC pours the water proofing property deficiency of material, invades with external water, causes the reinforced concretes such as Yuan Liang, plate
Steel bar corrosion inside native flexural member aggravates, and service life significantly shortens.In order to solve this problem, in research, add first
Enter water-repelling agent and hydrophobically modified is carried out to ECC so that the cracking face behind ECC surfaces and generation crack has certain hydrophobicity.When
After flexural member produces certain bending, ECC materials can produce a plurality of minute crack, because cracking face has certain hydrophobicity, energy
It is enough to invade with effectively preventing external water.Add hydrophobic nano level mineral material in the ecc simultaneously, on the one hand can strengthen ECC
Surface and produce crack after cracking face hydrophobicity, on the other hand can also effectively blocking portion external world water immerse lead to
Road, solve under miniature deformation, the problem of the waterproof of bent member, antirust.
To achieve these goals, the present invention adopts the following technical scheme that：
A kind of water proofing property ECC and carbon cloth composite consolidation material, including：Add ECC, the carbon cloth of additive；
The ECC raw materials include cement, one-level flyash, silica sand, thickener, water reducer, water, PVA fibers；
The additive includes：Hydrophobic material, volume are the 0.01%-0.1% of cement quality；Hydrophobic nano level ore deposit
Thing material, volume are the 0.5%-1.5% of cement quality.
The Reinforced Concrete Members with Flexure such as ECC and Yuan Liang, plate has good adhesive property, and itself has stronger answer
Change ability (typically more than 3%), after flexural member produces certain deformation, it still is able to be brought into close contact with it, solves engineering
The problem of upper conventional resin dipping glue carbon cloth easily comes unglued after the certain deformation of flexural member generation, ensures that carbon is fine
The tensile property of dimension cloth, which has obtained fully playing ECC, serves as carbon cloth protective layer, also solves carbon cloth and is afraid of naked light, is afraid of
The shortcomings that shock, it can effectively protect the carbon cloth of inside.
Preferably, the ECC is made up of the raw material of following parts by weight：Cement 80-120 parts, one-level flyash 100-150
Part, silica sand 80-100 parts, thickener 0.1-0.15 parts, water reducer 1-50 parts, PVA fiber volume 1.5-2.5 parts, ratio of mud 0.3-
0.45。
Preferably, the ECC is made up of the raw material of following parts by weight：Cement 80-100 parts, one-level flyash 100-125
Part, silica sand 80-90 parts, thickener 0.1-0.125 parts, water reducer 1-25 parts, PVA fiber volume 1.5-2 parts, ratio of mud 0.3-
0.375。
Preferably, the ECC is made up of the raw material of following parts by weight：Cement 100-120 parts, one-level flyash 125-150
Part, silica sand 90-100 parts, thickener 0.125-0.15 parts, water reducer 25-50 parts, PVA fiber volume 2.0-2.5 parts, the ratio of mud
0.375-0.45。
Preferably, the hydrophobic material is modified polymethyl hydrogen siloxane.
Preferably, the hydrophobic nano level mineral material is hydrophobic nanoscale calcium carbonate.
Preferably, the limit tensile strain of the ECC reaches more than 3%, and limit fracture width is less than 100 μm.
Present invention also offers a kind of water proofing property ECC and carbon cloth composite consolidation material preparation method, including：Successively
The solid constituents such as cement, one-level flyash, silica sand, thickener, hydrophobic nanoscale calcium carbonate are added, are mixed slowly, mixing time
For t2；The liquid components such as well mixed water, water reducer, modified polymethyl hydrogen siloxane are added, are mixed slowly, mixing time is
t1, then quick stirring, mixing time t2；Add PVA fibers, quick stirring, mixing time t3；ECC mixing is overturned by hand
Material, then quick stirring, mixing time t1；
The t1=1 minute, t2=2 minutes, t3=6 minutes.
Present invention also offers a kind of ECC and carbon cloth composite consolidation Reinforced Concrete Members with Flexure, including：Reinforcing bar
Concrete flexural member body, the carbon fibre cloth layer by curved side in the flexural member is coated with, is cast in the carbon cloth
The ECC layers in outside.
The Reinforced Concrete Members with Flexure such as ECC and Yuan Liang, plate has good adhesive property, and itself has stronger answer
Change ability (typically more than 3%), after flexural member produces certain deformation, it still is able to be brought into close contact with it, solves engineering
The problem of upper conventional resin dipping glue carbon cloth easily comes unglued after the certain deformation of flexural member generation, ensures that carbon is fine
The tensile property of dimension cloth is fully played.ECC serves as carbon cloth protective layer, also solve carbon cloth be afraid of naked light,
The shortcomings that being afraid of to hit, it can effectively protect the carbon cloth of inside.
On the other hand, compared with common resin impregnated carbon fiber cloth glue, ECC excellent in durability.
Preferably, the both ends of the carbon fibre cloth layer are positioned on the flexural member by stretch-draw anchor.
In order to solve the problems, such as that affixing carbon fabric easily comes unglued in engineering, the method through being anchored frequently with subsection tension is pasted
Carbon cloth, uses materials of the ECC as affixing carbon fabric instead, it is only necessary to carbon cloth both ends are shifted to an earlier date into stretch-draw anchor, then poured
Build or spray ECC, simplify operational procedure.
Beneficial effects of the present invention
1st, a kind of hydrophobic material such as modified polymethyl hydrogen siloxane, and hydrophobic nano carbonic acid are with the addition of in the ecc
A kind of hydrophobic nano mineral material such as calcium.Polymethyl hydrogen siloxane can make ECC have certain hydrophobicity；Hydrophobic nano
Calcium carbonate because its particle diameter is smaller, can effectively blocking portion external world water immerse passage.Both additives, it can cause
After ECC produces a plurality of minute crack, effectively external water can be prevented to invade, prevented in the Reinforced Concrete Members with Flexure such as Yuan Liang, plate
The steel bar corrosion in portion.
2nd, the Reinforced Concrete Members with Flexure such as ECC and Yuan Liang, plate has good adhesive property, and itself has stronger
Adaptability to changes (typically more than 3%), after flexural member produces certain deformation, it still is able to be brought into close contact with it, solves work
The problem of resin dipping glue carbon cloth commonly used in journey easily comes unglued after the certain deformation of flexural member generation, ensures carbon
The tensile property of fiber cloth is fully played.
3rd, in order to solve the problems, such as that affixing carbon fabric easily comes unglued in engineering, through being glued frequently with the method that subsection tension anchors
Carbon cloth is pasted, uses materials of the ECC as affixing carbon fabric instead, it is only necessary to carbon cloth both ends are shifted to an earlier date into stretch-draw anchor, then
Pour or spray ECC, simplify operational procedure.
4th, excellent in durability of the ECC than resin dipping glue.
5th, ECC serves as carbon cloth protective layer, also solves the shortcomings that carbon cloth is afraid of naked light, is afraid of to hit, can be effective
Carbon cloth inside protection.
6th, ECC can also coagulate the reinforcement material of native flexural member as the mixed reinforcing bar such as beam, plate, but ECC production cost
Compare high.ECC is used cooperatively with carbon cloth, makes carbon cloth main as the main bearing member for undertaking drawing-resistant function, ECC
Play a part of carbon cloth being firmly pasted onto on former flexural member, while also taken on part pulling force.Effectively play two
The kind respective advantage of material, while also reduce construction costs.There is practical significance in engineering.
Brief description of the drawings
Fig. 1 is water proofing property ECC and front view of the carbon cloth composite consolidation material for reinforcing beam body
Fig. 2 is water proofing property ECC and upward view of the carbon cloth composite consolidation material for reinforcing beam body
Embodiment
Feature of present invention and other correlated characteristics are described in further detail by the following examples, in order to the same industry
The understanding of technical staff：
Embodiment 1
1st, ECC raw material, including cement, one-level flyash, silica sand, thickener, PVA fibers, water reducer, water are modified poly-
A kind of hydrophobic material such as methyl hydrogen siloxane, and a kind of hydrophobic nano mineral material such as hydrophobic nanoscale calcium carbonate.Will
Cement quality is set to 1, and one-level flyash dosage is 1.0-1.5 times of cement quality, and silica sand dosage is the 0.8-1.0 of cement quality
Times, thickener dosage is the 0.1%-0.15% of cement quality, and ratio of mud 0.3-0.45, water reducer dosage is the 0- of cement consumption
0.5%, PVA fiber volume volume are 1.5%-2.5%, and a kind of hydrophobic material volume such as modified polymethyl hydrogen siloxane is water
A kind of hydrophobic nano mineral material volume such as the 0.01%-0.1% of shale amount, hydrophobic nanoscale calcium carbonate is cement quality
0.5%-1.5%.
2nd, ECC is formed with planetary mortar mixer or the stirring of ECC special-purpose stirring machines, and feeding sequence and mixing time are such as
Under：The solid constituents such as cement, one-level flyash, silica sand, thickener, hydrophobic nanoscale calcium carbonate are added, are mixed slowly 2 minutes；
The liquid components such as well mixed water, water reducer, modified polymethyl hydrogen siloxane are added, are mixed slowly 1 minute, then quick stirring
2 minutes；Add PVA fibers, quick stirring 6 minutes；ECC compounds, then quickly stirring 1 minute are overturned by hand.
3rd, after the ECC that mix forms is conserved 28 days under the conditions of standard curing, tension test is carried out, there is significant strain
Hardening capacity, many fine and closely woven cracks can be produced under tensile force effect, limit tensile strain reaches more than 3%, limit crack
Width is less than 100 μm.
4th, the Reinforced Concrete Members with Flexure such as the beam to need reinforcement, plate are reinforced into coarse (the laying carbon cloth portion of face polishing
Divide and do not polish), clean out, spread carbon cloth, and in both ends stretch-draw anchor.The species and size of carbon cloth, according to reality
Border stressing conditions determine.One layer is poured in whole reinforcing face and newly mixes ECC compounds.After conserving 28d, reinforcement is completed.
Embodiment 2
1st, ECC raw material, including cement, one-level flyash, silica sand, thickener, PVA fibers, water reducer, water are modified poly-
A kind of hydrophobic material such as methyl hydrogen siloxane, and a kind of hydrophobic nano mineral material such as hydrophobic nanoscale calcium carbonate.Will
Cement quality is set to 1, and one-level flyash dosage is 1.0 times of cement quality, and silica sand dosage is 0.8 times of cement quality, is thickened
Agent dosage is the 0.1% of cement quality, and the ratio of mud 0.3, water reducer dosage is 0.1%, the PVA fiber volume volumes of cement consumption
For 1.5%, a kind of hydrophobic material volume such as modified polymethyl hydrogen siloxane is the 0.01% of cement quality, hydrophobic nano carbon
A kind of hydrophobic nano mineral material volume such as sour calcium is the 0.5% of cement quality.
2nd, ECC is formed with planetary mortar mixer or the stirring of ECC special-purpose stirring machines, and feeding sequence and mixing time are such as
Under：The solid constituents such as cement, one-level flyash, silica sand, thickener, hydrophobic nanoscale calcium carbonate are added, are mixed slowly 2 minutes；
The liquid components such as well mixed water, water reducer, modified polymethyl hydrogen siloxane are added, are mixed slowly 1 minute, then quick stirring
2 minutes；Add PVA fibers, quick stirring 6 minutes；ECC compounds, then quickly stirring 1 minute are overturned by hand.
3rd, after the ECC that mix forms is conserved 28 days under the conditions of standard curing, tension test is carried out, there is significant strain
Hardening capacity, many fine and closely woven cracks can be produced under tensile force effect, limit tensile strain reaches more than 3%, limit crack
Width is less than 100 μm.
4th, the Reinforced Concrete Members with Flexure such as the beam to need reinforcement, plate are reinforced into coarse (the laying carbon cloth portion of face polishing
Divide and do not polish), clean out, spread carbon cloth, and in both ends stretch-draw anchor.The species and size of carbon cloth, according to reality
Border stressing conditions determine.One layer is poured in whole reinforcing face and newly mixes ECC compounds.After conserving 28d, reinforcement is completed.
Embodiment 3
1st, ECC raw material, including cement, one-level flyash, silica sand, thickener, PVA fibers, water reducer, water are modified poly-
A kind of hydrophobic material such as methyl hydrogen siloxane, and a kind of hydrophobic nano mineral material such as hydrophobic nanoscale calcium carbonate.Will
Cement quality is set to 1, and one-level flyash dosage is 1.5 times of cement quality, and silica sand dosage is 1.0 times of cement quality, is thickened
Agent dosage is the 0.15% of cement quality, and the ratio of mud 0.45, water reducer dosage is that 0.5%, the PVA fiber volumes of cement consumption are mixed
Measure as 2.5%, a kind of hydrophobic material volume such as modified polymethyl hydrogen siloxane is the 0.1% of cement quality, hydrophobic nano
A kind of hydrophobic nano mineral material volume such as calcium carbonate is the 1.5% of cement quality.
2nd, ECC is formed with planetary mortar mixer or the stirring of ECC special-purpose stirring machines, and feeding sequence and mixing time are such as
Under：The solid constituents such as cement, one-level flyash, silica sand, thickener, hydrophobic nanoscale calcium carbonate are added, are mixed slowly 2 minutes；
The liquid components such as well mixed water, water reducer, modified polymethyl hydrogen siloxane are added, are mixed slowly 1 minute, then quick stirring
2 minutes；Add PVA fibers, quick stirring 6 minutes；ECC compounds, then quickly stirring 1 minute are overturned by hand.
3rd, after the ECC that mix forms is conserved 28 days under the conditions of standard curing, tension test is carried out, there is significant strain
Hardening capacity, many fine and closely woven cracks can be produced under tensile force effect, limit tensile strain reaches more than 3%, limit crack
Width is less than 100 μm.
4th, the Reinforced Concrete Members with Flexure such as the beam to need reinforcement, plate are reinforced into coarse (the laying carbon cloth portion of face polishing
Divide and do not polish), clean out, spread carbon cloth, and in both ends stretch-draw anchor.The species and size of carbon cloth, according to reality
Border stressing conditions determine.One layer is poured in whole reinforcing face and newly mixes ECC compounds.After conserving 28d, reinforcement is completed.
As a result show：
Under conditions of flexural member produces certain deformation, water absorption rate of the invention reduces by 10~30% than common ECC.
Table 1
Ratio is mass ratio in table 1 (PVA fiber consumptions refer to volume fraction).
Embodiment 4
ECC and carbon cloth composite consolidation a kind of Reinforced Concrete Members with Flexure, including：Reinforced Concrete Members with Flexure
Body, it is coated with the carbon fibre cloth layer by curved side in the flexural member, the ECC layers being cast on the outside of the carbon cloth.
The Reinforced Concrete Members with Flexure such as ECC and Yuan Liang, plate has good adhesive property, and itself has stronger answer
Change ability (typically more than 3%), after flexural member produces certain deformation, it still is able to be brought into close contact with it, solves engineering
The problem of upper conventional resin dipping glue carbon cloth easily comes unglued after the certain deformation of flexural member generation, ensures that carbon is fine
The tensile property of dimension cloth, which has obtained fully playing ECC, serves as carbon cloth protective layer, also solves carbon cloth and is afraid of naked light, is afraid of
The shortcomings that shock, it can effectively protect the carbon cloth of inside.
Embodiment 5
ECC and carbon cloth composite consolidation a kind of Reinforced Concrete Members with Flexure, including：Reinforced Concrete Members with Flexure
Body, it is coated with the carbon fibre cloth layer by curved side in the flexural member, the ECC layers being cast on the outside of the carbon cloth.
The both ends of the carbon fibre cloth layer are positioned on the flexural member by stretch-draw anchor.
In order to solve the problems, such as that affixing carbon fabric easily comes unglued in engineering, the method through being anchored frequently with subsection tension is pasted
Carbon cloth, uses materials of the ECC as affixing carbon fabric instead, it is only necessary to carbon cloth both ends are shifted to an earlier date into stretch-draw anchor, then poured
Build or spray ECC, simplify operational procedure.
Embodiment 6
ECC and carbon cloth composite consolidation a kind of Reinforced Concrete Members with Flexure, including：Reinforced Concrete Members with Flexure
Body, it is coated with the carbon fibre cloth layer by curved side in the flexural member, the ECC layers being cast on the outside of the carbon cloth.
The length of the carbon cloth is the 2/3 of flexural member length, and the carbon fiber width is flexural member width
1/7.Research is found：Now the tensile property of carbon cloth is fully played, and carbon cloth dosage is minimum.
Embodiment 7
ECC and carbon cloth composite consolidation a kind of Reinforced Concrete Members with Flexure, including：Reinforced Concrete Members with Flexure
Body, it is coated with the carbon fibre cloth layer by curved side in the flexural member, the ECC layers being cast on the outside of the carbon cloth.
The distance of the center line of the carbon cloth and the center line of flexural member is the 0-1/18 of the length of flexural member
Times.Within the range, the tensile property of carbon cloth can be not fully exerted, and by the optimization to installation site, expand
The scope of application of carbon cloth, possibility is provided for the component installation under some extreme conditions.
Finally it should be noted that the foregoing is only the preferred embodiments of the present invention, this hair is not limited to
Bright, although the present invention is described in detail with reference to the foregoing embodiments, for those skilled in the art, it is still
Technical scheme described in previous embodiment can be modified, or equivalent substitution is carried out to which part.It is all in this hair
Within bright spirit and principle, any modification, equivalent substitution and improvements made etc., protection scope of the present invention should be included in
Within.Above-mentioned although the embodiment of the present invention is described with reference to accompanying drawing, not to the scope of the present invention
Limitation, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not required to
Various modifications or deformation that creative work can make are paid still within protection scope of the present invention.
Claims (6)
1. a kind of water proofing property ECC and carbon cloth composite consolidation material, it is characterised in that including：Add ECC, the carbon of additive
Fiber cloth；
The ECC raw materials include cement；
The additive includes：Modified polymethyl hydrogen siloxane, volume are the 0.01%-0.1% of cement quality；Hydrophobic nano
Calcium carbonate, volume are the 0.5%-1.5% of cement quality.
2. composite consolidation material as claimed in claim 1, it is characterised in that the ECC is made up of the raw material of following parts by weight：
Cement 80-120 parts, one-level flyash 100-150 parts, silica sand 80-100 parts, thickener 0.1-0.15 parts, water reducer 1-50 parts,
PVA fiber 1.5-2.5 parts, ratio of mud 0.3-0.45.
3. composite consolidation material as claimed in claim 1, it is characterised in that the ECC is made up of the raw material of following parts by weight：
Cement 80-100 parts, one-level flyash 100-125 parts, silica sand 80-90 parts, thickener 0.1-0.125 parts, water reducer 1-25 parts,
PVA fiber 1.5-2 parts, ratio of mud 0.3-0.375.
4. composite consolidation material as claimed in claim 1, it is characterised in that the ECC is made up of the raw material of following parts by weight：
Cement 100-120 parts, one-level flyash 125-150 parts, silica sand 90-100 parts, thickener 0.125-0.15 parts, water reducer 25-50
Part, PVA fiber 2.0-2.5 parts, ratio of mud 0.375-0.45.
5. composite consolidation material as claimed in claim 1, it is characterised in that the limit tensile strain of the ECC reach 3% with
On, limit fracture width is less than 100 μm.
6. any one of the claim 1-5 water proofing property ECC and carbon cloth composite consolidation material preparation method, its feature exist
In, including：Cement, one-level flyash, silica sand, thickener, hydrophobic nanoscale calcium carbonate are sequentially added, is mixed slowly, during stirring
Between be t2；Well mixed water, water reducer, modified polymethyl hydrogen siloxane are added, is mixed slowly, mixing time t1, then quickly
Stirring, mixing time t2；Add PVA fibers, quick stirring, mixing time t3；ECC compounds are overturned by hand, then are quickly stirred
Mix, mixing time t1；
The t1=1 minute, t2=2 minutes, t3=6 minutes.
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| CN109400051A (en) * | 2018-10-19 | 2019-03-01 | 德阳科吉高新材料有限责任公司 | A kind of manufacturing method of cement-base composite material |
| CN109485322A (en) * | 2018-12-14 | 2019-03-19 | 北京市住宅产业化集团股份有限公司 | A kind of high-performance protective mortar and preparation method thereof |
| CN112482816A (en) * | 2020-12-03 | 2021-03-12 | 武汉大学 | FRP/ECC double-faced adhesive type reinforced concrete bidirectional plate for reinforcing damaged steel bar and preparation method thereof |
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