CN109942257A - A kind of road superhigh tenacity cement-base composite material and its preparation method and application - Google Patents
A kind of road superhigh tenacity cement-base composite material and its preparation method and application Download PDFInfo
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- 239000002131 composite material Substances 0.000 title claims abstract description 102
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
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- 239000003795 chemical substances by application Substances 0.000 claims abstract description 44
- 239000000835 fiber Substances 0.000 claims abstract description 38
- 229920002521 macromolecule Polymers 0.000 claims abstract description 34
- 230000004048 modification Effects 0.000 claims abstract description 33
- 238000012986 modification Methods 0.000 claims abstract description 33
- 229920000642 polymer Polymers 0.000 claims abstract description 32
- 238000005728 strengthening Methods 0.000 claims abstract description 32
- 239000003607 modifier Substances 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 28
- 239000000839 emulsion Substances 0.000 claims abstract description 28
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- 239000000463 material Substances 0.000 claims abstract description 23
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- 238000003756 stirring Methods 0.000 claims description 7
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- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
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- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 2
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical compound O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 claims description 2
- GUBGYTABKSRVRQ-PICCSMPSSA-N D-Maltose Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@@H]1O[C@@H]1[C@@H](CO)OC(O)[C@H](O)[C@H]1O GUBGYTABKSRVRQ-PICCSMPSSA-N 0.000 claims 2
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- 238000012360 testing method Methods 0.000 description 9
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- 238000001035 drying Methods 0.000 description 5
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- 238000000034 method Methods 0.000 description 5
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- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000011182 bendable concrete Substances 0.000 description 1
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- Road Paving Structures (AREA)
Abstract
The present invention relates to ground surface material technical fields, and in particular to a kind of road superhigh tenacity cement-base composite material and its preparation method and application.By mass percentage, the composite material includes following component: cement 20%-25%, flyash 30%-35%, water 10%-15%, fiber 1.5%-2%, sand 30%-35%, water-reducing agent 0.1%-0.3%, thickener 0.02%-0.03%；The composite material further include: the polymer modifiers of cement quality 10-25%, the polymer modifiers are made of macromolecule emulsion and modification strengthening agent, and the mass ratio of macromolecule emulsion and modification strengthening agent is 1.2-1.9:1.The present invention, which provides composite material, has excellent durability, impact resistance and anti-fatigue performance；It is applied to after traditional asphalt pavement structure the problem of capable of better solving pavement durability, the service life for the pavement structure that is significantly increased.
Description
Technical field
The present invention relates to ground surface material technical fields, and in particular to a kind of road superhigh tenacity cement-base composite material and its
Preparation method and application.
Background technique
It is only intended to increase understanding of the overall background of the invention for information disclosed in background of invention, without
It is existing well known to persons skilled in the art so to be considered as recognizing or imply that information composition has become in any form
Technology.
Superhigh tenacity cement-base composite material (Engineered Cementitious Composites, abbreviation ECC) is
Theoretical based on Micromechanics design of material, using fiber reinforcement, flexural tensile strength with higher, should be hardened excellent deformability
Change and the fiber reinforced cement-based composite material of multiple crack growth feature, ECC surpass as a kind of having based on Micromechanical Design
The random distribution short fiber reinforced cement-base composite material of obdurability is widely used to traditional structure work such as bridge in foreign countries
Journey efficiently solves the problems, such as the diseases such as the cracking that existing deck paving occurs.
Patent document CN 201710022823.8 discloses a kind of superhigh tenacity cement base composite wood for mixing PVA fiber
Material, is made of cement, flyash, sand, water, water-reducing agent, thickener and PVA fiber.The composite material joined a large amount of flyash
As raw material, the existing industrial residue for being unfavorable for environmental protection is consumed, the dosage of cement is reduced, advantageously reduces carbon row
It puts, so that high ductility cement-base composite material is more green.However, present inventors believe that with highway in China construction it is continuous
Development, highway loading constantly increase, and since current domestic high-grade highway mainly uses semi-rigid asphalt pavement, are servicing
Easily occur the pavement diseases such as reflection crack in period, greatly reduce the service life on road surface, existing method for maintaining is main
It is that it is strong to enhance existing pavement structure for outrigger location layer or progress surface disposition, maintenance road table disease on existing pavement of road
Degree.Or interlayer is overlayed between new asphalt surface course and existing roadbed, prevent the generation of reflection crack.But concrete and pitch
Use bring significant challenge to environment.Cement is key components in concrete, and the every annual meeting release of production cement is more than
1.6 hundred million tonnes of carbon dioxide accounts for the 8% of whole mankind's activity CO2 emission total amount, can also produce during producing cement
Other raw a large amount of pollutants, such as particulate matter and sulfur oxide.The raw material energy of 7613MJ can be consumed by producing 1 cubic metre of pitch, and
Pitch is a big organic volatile material resource, and data is shown, can volatile organic compounds every year in U.S.'s asphalt pavement construction
200000 tons.In addition, the service life of concrete and asphalt material is limited, cause the maintenance of some roads and maintenance frequent；Therefore,
It is necessary to further improve the performance of superhigh tenacity cement-base composite material.
Summary of the invention
For the above technical issues, the present invention is directed to a kind of road superhigh tenacity cement-base composite materials and its preparation side
Method and application.The present invention, which provides composite material, has excellent durability, impact resistance and anti-fatigue performance；It is applied to biography
The problem of pavement durability can be better solved after system asphalt pavement structure, the service life for the pavement structure that is significantly increased.
An object of the present disclosure is to provide a kind of road superhigh tenacity cement-base composite material.
Second purpose of the invention, is to provide the preparation method of the road superhigh tenacity cement-base composite material.
Third purpose of the present invention provides the application of the road superhigh tenacity cement-base composite material.
For achieving the above object, the invention discloses following technical proposals:
Firstly, the present invention discloses a kind of road superhigh tenacity cement-base composite material, it is by mass percentage, described compound
Material includes following component: cement 20%-25%, flyash 30%-35%, water 10%-15%, fiber 1.5%-2%, sand
30%-35%, water-reducing agent 0.1%-0.3%, thickener 0.02%-0.03%；The composite material further include: account for cement quality
The polymer modifiers of 10-25%, the polymer modifiers is made of macromolecule emulsion and modification strengthening agent, and macromolecule latex
The mass ratio of liquid and modification strengthening agent is 1.2-1.9:1.
As further technical solution, the macromolecule emulsion is butadiene-styrene latex, the modification strengthening agent
It include: any one in diethylene glycol (DEG), glycerine, triethanolamine and anhydrous sodium sulfite.
As further technical solution, the cement uses ordinary portland cement, marked as 42.5.Cement is mainly made
For cementitious material, the key component of intensity, strain hardening characteristic of the content to composite material are hardened and formed for composite material
And maximum stretching strain is affected.
As further technical solution, the flyash adopts I grades of flyash.Activity SiO in coal ash2, activity Al2O3With
F-CaO (free calcium oxide) is active advantageous component, can change the ductility and construction workability of composite material significantly.
As further technical solution, the sand uses the quartz sand of 50-100 mesh.Quartz sand is mutual with cementitious material
Effect, influences the cohesive force and dispersibility of fiber and basis material.
As further technical solution, the fiber uses vinal, length 8-12mm, and equivalent diameter is
35-40μm.Toughener of the PVA fiber as composite material can improve the flexural tensile strength of composite material to a certain extent, answer
Denaturation energy and cracking resistance.
As further technical solution, the water-reducing agent uses poly carboxylic acid series water reducer or naphthalene water reducer.For changing
The workability of kind composite material is conducive to fiber being uniformly dispersed in the composite.
As further technical solution, the thickener uses cellulose thickener, is conducive to adjust composite material
Viscosity.
As further technical solution, the composite material further include: account for the redispersible of cement quality 1.5-2.5%
Latex powder.Preferably, the redispersable latex powder is VAC/E redispersable latex powder, i.e. vinylacetate and ethylene copolymer
Rubber powder.Be added redisperse latex powder advantage be；In composite material hardening process, inside can generate many cavitys, and moisture is just
It is easily accumulated on these cavity insides.With the curing and drying of basis material, these cavitys at matrix relatively weak part.
After redispersable latex powder is added, " self-lubricating function " have latex powder can voluntarily in the entire mortar of redisperse, in water
Redispersible disperse it rapidly and form lotion, riddle the cavity being originally occupied by the water.With drying process into
Row, lotion is dehydrated again forms poly- platform object film, and is continuously distributed in generated cavity surrounding when basis material solidification.This
The continuous thin polymer film being attached on hole wall a bit can be effectively absorbed from extraneous stress, significantly improve composite system
Self-constriction, improve the toughness and anti-crack ability of composite material, enhance flexural strength, reduce the backfin ratio and drying shrinkage of composite material
Rate, so that the comprehensive performance of composite material be made to be improved.
Secondly, the present invention discloses the preparation method of the road superhigh tenacity cement-base composite material, include the following steps:
(1) siccative of cement, flyash, sand, thickener and water-reducing agent is stirred in proportion, obtains mixed powder；
(2) water is added in mixed powder to be stirred, makes mixed powder evenly dispersed no agglomeration in water, adds point
Powder, economization agent, continuously add polymer modifiers after the completion and/or redispersable latex powder is stirred to forming thick and energy
The slurry of enough Uniform Flows；
(3) fiber is added in the slurry to stir evenly to get the road superhigh tenacity cement-base composite material is arrived.
Finally, the present invention discloses the application that superhigh tenacity cement-base composite material is used as ground surface material in the road.
Compared with prior art, the present invention achieve it is following the utility model has the advantages that
(1) present invention, which provides composite material, has excellent durability, impact resistance and anti-fatigue performance；It is applied to
The problem of pavement durability can be better solved after traditional asphalt pavement structure, the service life for the pavement structure that is significantly increased.
(2) of the invention to improve the adhesive property of superhigh tenacity cement-base composite material by the way that macromolecule emulsion is added, resist
Chemical corrosion resistance, anti-carbonation properties, mobility etc. make the superhigh tenacity cement-base composite material of preparation have excellent synthesis
Performance.
(3) present invention acts on flyash by the way that redispersable latex powder is added, significantly improves composite system
Self-constriction improves toughness, anti-crack ability and the flexural strength of composite material, reduces the backfin ratio and drying shrinkage of composite material
Rate makes the superhigh tenacity cement-base composite material of preparation have more comprehensive comprehensive performance, can effectively enhance composite material
Environmental suitability.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the present invention.Unless another
It indicates, all technical and scientific terms used herein has usual with general technical staff of the technical field of the invention
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to exemplary embodiments of the present invention.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
As previously mentioned, with the continuous development that highway in China is built, highway loading constantly increases, due to domestic at present
High-grade highway mainly uses semi-rigid asphalt pavement, easily occurs the pavement diseases such as reflection crack within the seeervice cycle,
Greatly reduce the service life on road surface.For this purpose, the present invention proposes a kind of road superhigh tenacity cement-base composite material and its system
Preparation Method and application；The present invention is further illustrated now in conjunction with specific embodiment.
In the following example, the flyash adopts I grades of flyash, builds and earth working material Co., Ltd purchased from middle day.It is described
Water-reducing agent uses polycarboxylate water-reducer, and main component is maleic anhydride polyoxyethylene sulfonated ester.The water-reducing agent uses naphthalene system
Water-reducing agent, main component are B- naphthalenesulfonate formaldehyde condensation compound.The cement uses ordinary portland cement, marked as 42.5；
The sand is the quartz sand of 50-100 mesh.The fiber uses vinal.The redispersable latex powder uses VAC/E
Redispersable latex powder.
Embodiment 1
A kind of road superhigh tenacity cement-base composite material, by mass percentage, the composite material include such as the following group
Point: cement 22%, flyash 33%, fiber 1.8%, sand 32%, water-reducing agent 0.15%, thickener 0.02%, water are surplus.Institute
The polymer modifiers (outer-penetrating agent) of composite material also outer doping cement quality 18% is stated, the polymer modifiers is by macromolecule latex
Liquid and modification strengthening agent composition, and the mass ratio of macromolecule emulsion and modification strengthening agent is 1.5:1；The macromolecule emulsion is fourth
Styrene latex, the modification strengthening agent are anhydrous sodium sulfite powder.The average length of the fiber is about 12mm, etc.
Imitating diameter is about 39 μm.
Embodiment 2
A kind of road superhigh tenacity cement-base composite material, by mass percentage, the composite material include such as the following group
Point: cement 20%, flyash 30%, fiber 1.5%, sand 35%, water-reducing agent 0.1%, thickener 0.03%, water are surplus.Institute
The polymer modifiers (outer-penetrating agent) of composite material also outer doping cement quality 22% is stated, the polymer modifiers is by macromolecule latex
Liquid and modification strengthening agent composition, and the mass ratio of macromolecule emulsion and modification strengthening agent is 1.9:1；The macromolecule emulsion is fourth
Styrene latex, the modification strengthening agent are diethylene glycol (DEG).The average length of the fiber is about 10mm, and equivalent diameter is big
About 35 μm.
Embodiment 3
A kind of road superhigh tenacity cement-base composite material, by mass percentage, the composite material include such as the following group
Point: cement 25%, flyash 32%, fiber 1.5%, sand 30%, water-reducing agent 0.1%, thickener 0.02%, water are surplus.Institute
The polymer modifiers (outer-penetrating agent) of composite material also outer doping cement quality 10% is stated, the polymer modifiers is by macromolecule latex
Liquid and modification strengthening agent composition, and the mass ratio of macromolecule emulsion and modification strengthening agent is 1.7:1；The macromolecule emulsion is fourth
Styrene latex, the modification strengthening agent are anhydrous sodium sulfite powder.The average length of the fiber is about 8mm, equivalent
Diameter is about 40 μm.
Embodiment 4
A kind of road superhigh tenacity cement-base composite material, by mass percentage, the composite material include such as the following group
Point: cement 20%, flyash 35%, fiber 2%, water 10%, water-reducing agent 0.3%, thickener 0.02%, sand are surplus.Institute
The polymer modifiers (outer-penetrating agent) of composite material also outer doping cement quality 15% is stated, the polymer modifiers is by macromolecule latex
Liquid and modification strengthening agent composition, and the mass ratio of macromolecule emulsion and modification strengthening agent is 1.2:1；The macromolecule emulsion is fourth
Styrene latex, the modification strengthening agent are glycerine；The average length of the fiber is about 12mm, and equivalent diameter is big
About 39 μm.
Embodiment 5
A kind of road superhigh tenacity cement-base composite material, by mass percentage, the composite material include such as the following group
Point: cement 20%, flyash 33%, fiber 1.5%, water 15%, water-reducing agent 0.3%, thickener 0.02%, sand are surplus.
The polymer modifiers (outer-penetrating agent) of the composite material also outer doping cement quality 25%, the polymer modifiers is by macromolecule
Lotion and modification strengthening agent composition, and the mass ratio of macromolecule emulsion and modification strengthening agent is 1.6:1；The macromolecule emulsion is
Butadiene-styrene latex, the modification strengthening agent are three ethyl alcohol.The average length of the fiber is about 8mm, and equivalent diameter is big
About 40 μm.
Embodiment 6
A kind of road superhigh tenacity cement-base composite material, by mass percentage, the composite material include such as the following group
Point: cement 22%, flyash 33%, fiber 1.8%, sand 32%, water-reducing agent 0.15%, thickener 0.02%, water are surplus.Institute
The redispersable latex powder of the polymer modifiers and cement quality 2% of composite material also outer doping cement quality 18% is stated, it is described
Polymer modifiers is made of macromolecule emulsion and modification strengthening agent, and the mass ratio of macromolecule emulsion and modification strengthening agent is
1.5:1；The macromolecule emulsion is butadiene-styrene latex, and the modification strengthening agent is anhydrous sodium sulfite；The fiber
Average length be about 12mm, equivalent diameter is about 39 μm.
Embodiment 7
A kind of road superhigh tenacity cement-base composite material, by mass percentage, the composite material include such as the following group
Point: cement 20%, flyash 30%, fiber 1.5%, sand 35%, water-reducing agent 0.1%, thickener 0.03%, water are surplus.Institute
State the redispersable latex powder of the polymer modifiers and cement quality 1.5% of composite material also outer doping cement quality 22%, institute
It states polymer modifiers to be made of macromolecule emulsion and modification strengthening agent, and the mass ratio of macromolecule emulsion and modification strengthening agent is
1.9:1；The macromolecule emulsion is butadiene-styrene latex, and the modification strengthening agent is diethylene glycol (DEG)；The fiber is averaged
Length is about 10mm, and equivalent diameter is about 35 μm.
Embodiment 8
A kind of road superhigh tenacity cement-base composite material, by mass percentage, the composite material include such as the following group
Point: cement 25%, flyash 32%, fiber 1.5%, sand 30%, water-reducing agent 0.1%, thickener 0.02%, water are surplus.Institute
State the redispersable latex powder of the polymer modifiers and cement quality 2.5% of composite material also outer doping cement quality 10%, institute
It states polymer modifiers to be made of macromolecule emulsion and modification strengthening agent, and the mass ratio of macromolecule emulsion and modification strengthening agent is
1.7:1；The macromolecule emulsion is butadiene-styrene latex, and the modification strengthening agent is anhydrous sodium sulfite powder；The fibre
The average length of dimension is about 8mm, and equivalent diameter is about 40 μm.
Embodiment 9
A kind of road superhigh tenacity cement-base composite material, by mass percentage, the composite material include such as the following group
Point: cement 22%, flyash 33%, fiber 1.8%, sand 32%, water-reducing agent 0.15%, thickener 0.02%, water are surplus.Institute
The average length for stating fiber is about 12mm, and equivalent diameter is about 39 μm.
Embodiment 10
A kind of road superhigh tenacity cement-base composite material, by mass percentage, the composite material include such as the following group
Point: cement 20%, flyash 30%, fiber 1.5%, sand 35%, water-reducing agent 0.1%, thickener 0.03%, water are surplus.Institute
The average length for stating fiber is about 10mm, and equivalent diameter is about 35 μm.
Performance test:
Road prepared by above-described embodiment 1-10 is prepared into test block with superhigh tenacity cement-base composite material and carries out performance survey
Examination, specifically, including the following steps:
(1) siccative of cement, flyash, quartz sand, thickener and water-reducing agent is placed in blender in proportion and is stirred
7min；
(2) water is continuously added on the basis of step (1) to be stirred, make powder body material evenly dispersed no knot in water
Block, adding polymer modifiers and VAC/E redispersable latex powder, (embodiment 1-5 does not add the rubber powder, embodiment 9 and 10
When not adding polymer modifiers and rubber powder, remove corresponding steps), it stirs to thick and be capable of the matrix of Uniform Flow
Material, being conducive to subsequent fiber material can be uniformly distributed in basis material, improve the non-deformability of composite material；
(3) fiber stirring 7min is added on the basis of step (2) to get multiple to the road superhigh tenacity cement base
Condensation material.
(4) according to the road mechanical characteristic of superhigh tenacity cement-base composite material, length × width × height is made in composite material
=350mm × 50mm × 15mm test specimen, carries out every Mechanics Performance Testing, test all referring to specification " highway engineering cement and
Cement concrete testing regulations JTG E30-2015 ", test piece maintenance condition is to conserve in the water of normal temperature (20 ± 1) DEG C,
Test result is as shown in table 1:
Table 1
| Embodiment sequence number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Ultimate tensile strength/% | 7.4 | 6.9 | 8.1 | 7.8 | 6.2 | 8.7 | 9.3 | 9.1 | 4.8 | 4.2 |
| Tensile strength/MPa (28d) | 16.7 | 15.2 | 17.3 | 14.5 | 15.9 | 18.4 | 19.3 | 18.7 | 6.8 | 7.4 |
| Flexural strength/MPa (28d) | 10.5 | 10.0 | 11.4 | 9.9 | 10.3 | 12.4 | 12.9 | 12.6 | 3.6 | 4.3 |
| Fluidity/s | 20.3 | 21.8 | 21.0 | 22.0 | 21.7 | 21.4 | 21.1 | 20.5 | 26.1 | 25.7 |
| Backfin ratio | 3.5 | 3.8 | 3.1 | 4.0 | 3.6 | 2.9 | 2.6 | 2.8 | 5.6 | 5.3 |
| Contract with dry rate/% | 0.021 | 0.022 | 0.020 | 0.023 | 0.019 | 0.015 | 0.017 | 0.016 | 0.032 | 0.030 |
The test data of the road superhigh tenacity cement-base composite material prepared from 1 embodiment 1-8 of table is it can be seen that the limit
Stretching strain averagely reaches 8% or more, and tensile strength averagely reaches 15MPa or more, draws performance, multiple crack growth with excellent bending resistance
Characteristic and flexural strength are conducive to the bearing capacity for improving sub-surface, reduce surface cracking, help to realize " strong basis sake "
Pavement structure.After this is mainly added to the polymer modifiers being made of macromolecule emulsion and modification strengthening agent, polymer
Main component is type copolymers in modifying agent, and for long chain polymer, polymer particle is dispersed in basis material, dehydration
Gradually form the colloid of cohesion and the polymer film with caking property and preferable toughness, make composite material become one it is firm whole
Body, and flexible " line " structure can be formed in stress across the micro-cracks in basis material, stress collection both can be dispersed
In, and increase the ability of resistance to deformation, increase the toughness of composite material, tensile strength improves.
The test data of the road superhigh tenacity cement-base composite material prepared from table 1 embodiment 1-5 and 6-8 can
Out: after being added to redispersable latex powder on the basis of being added to polymer modifiers, the ultimate tensile strength of composite material resists
The performances such as tensile strength, flexural strength, backfin ratio and contract with dry rate are further enhanced, and are found after research: this is because can
Redisperse latex powder can be acted on flyash, can significantly improve the self-constriction of composite system, improve the tough of composite material
Property and anti-crack ability, enhance flexural strength, reduce the backfin ratio and contract with dry rate of composite material.This is because being hardened in basis material
In the process, inside can generate many cavitys, and moisture is just easily accumulated on these cavity insides.As the solidification of basis material is dry
It is dry, these cavitys at matrix relatively weak part.After redispersable latex powder is added, " self-lubricating function " makes latex powder meeting
Voluntarily in the entire mortar of redisperse, the redispersible having had in water disperses it rapidly and forms lotion, riddles original
The cavity being occupied by the water.With the progress of drying process, lotion is dehydrated again forms poly- platform object film, and is continuously distributed in base
Generated cavity surrounding when body material solidification.These, which are attached to the continuous thin polymer film on hole wall and can effectively absorb, comes from
Extraneous stress, so that the comprehensive performance of composite material be made to be improved.
The above description is only a preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of road superhigh tenacity cement-base composite material, which is characterized in that by mass percentage, the composite material packet
Include following component: cement 20%-25%, flyash 30%-35%, water 10%-15%, fiber 1.5%-2%, sand 30%-
35%, water-reducing agent 0.1%-0.3%, thickener 0.02%-0.03%；The composite material further include: account for cement quality 10-
25% polymer modifiers, the polymer modifiers is made of macromolecule emulsion and modification strengthening agent, and macromolecule emulsion
Mass ratio with modification strengthening agent is 1.2-1.9:1, and the macromolecule emulsion is butadiene-styrene latex, the modified increasing
Strong agent includes: any one in diethylene glycol (DEG), malt sugar, glycerine, triethanolamine and anhydrous sodium sulfite.
2. road as described in claim 1 superhigh tenacity cement-base composite material, which is characterized in that the flyash adopts I grades
Flyash.
3. road as described in claim 1 superhigh tenacity cement-base composite material, which is characterized in that the sand uses 50-100
Purpose quartz sand.
4. road as described in claim 1 superhigh tenacity cement-base composite material, which is characterized in that the fiber uses poly- second
Enol fiber, length 8-12mm, equivalent diameter are 35-40 μm.
5. road as described in claim 1 superhigh tenacity cement-base composite material, which is characterized in that the water-reducing agent is using poly-
Carboxylic acid water reducing agent or naphthalene water reducer.
6. road as described in claim 1 superhigh tenacity cement-base composite material, which is characterized in that the thickener is using fine
Tie up plain class thickener.
7. road as claimed in any one of claims 1 to 6 superhigh tenacity cement-base composite material, which is characterized in that described compound
Material further include: account for the redispersable latex powder of cement quality 1.5-2.5%；Preferably, the redispersable latex powder is
VAC/E redispersable latex powder.
8. the road as claimed in any one of claims 1 to 6 preparation method of superhigh tenacity cement-base composite material, feature exist
In including the following steps:
(1) siccative of cement, flyash, sand, thickener and water-reducing agent is stirred in proportion, obtains mixed powder；
(2) water is added in mixed powder to be stirred, makes mixed powder evenly dispersed no agglomeration in water, adds dispersion
Agent, economization agent continuously add polymer modifiers after the completion and stir to forming slurry that is thick and being capable of Uniform Flow；
(3) fiber is added in the slurry to stir evenly to get the road superhigh tenacity cement-base composite material is arrived.
9. the road as claimed in claim 7 preparation method of superhigh tenacity cement-base composite material, which is characterized in that including such as
Lower step:
(1) siccative of cement, flyash, sand, thickener and water-reducing agent is stirred in proportion, obtains mixed powder；
(2) water is added in mixed powder to be stirred, makes mixed powder evenly dispersed no agglomeration in water, adds dispersion
Agent, economization agent, continuously add polymer modifiers after the completion and redispersable latex powder stir it is thick and can be equal to being formed
The dynamic slurry of uniform flow；
(3) fiber is added in the slurry to stir evenly to get the road superhigh tenacity cement-base composite material is arrived.
10. as the described in any item roads claim 1-7 use superhigh tenacity cement-base composite material as the application of ground surface material.
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| CN111851192A (en) * | 2020-06-27 | 2020-10-30 | 同济大学 | An ultra-high ductility concrete stress-absorbing layer asphalt pavement |
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