CN105948665B - A kind of morning strong lower shrinkage high tenacity cement base engineering material and preparation method thereof - Google Patents
A kind of morning strong lower shrinkage high tenacity cement base engineering material and preparation method thereof Download PDFInfo
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- CN105948665B CN105948665B CN201610288627.0A CN201610288627A CN105948665B CN 105948665 B CN105948665 B CN 105948665B CN 201610288627 A CN201610288627 A CN 201610288627A CN 105948665 B CN105948665 B CN 105948665B
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- 239000004568 cement Substances 0.000 title claims abstract description 102
- 239000000463 material Substances 0.000 title claims abstract description 92
- 238000002360 preparation method Methods 0.000 title claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 67
- 239000000835 fiber Substances 0.000 claims abstract description 44
- 239000011398 Portland cement Substances 0.000 claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 30
- 239000002994 raw material Substances 0.000 claims abstract description 30
- 239000010959 steel Substances 0.000 claims abstract description 30
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 29
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 27
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 27
- 239000004411 aluminium Substances 0.000 claims abstract description 27
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 27
- 239000010703 silicon Substances 0.000 claims abstract description 27
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 27
- 229910021653 sulphate ion Inorganic materials 0.000 claims abstract description 27
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 25
- 239000004576 sand Substances 0.000 claims abstract description 24
- -1 vinal Substances 0.000 claims abstract description 14
- 239000002002 slurry Substances 0.000 claims description 47
- 239000000203 mixture Substances 0.000 claims description 44
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical group [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims description 29
- 229910052808 lithium carbonate Inorganic materials 0.000 claims description 29
- 239000004327 boric acid Substances 0.000 claims description 28
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 26
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 25
- 238000003756 stirring Methods 0.000 claims description 22
- 230000000694 effects Effects 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 9
- 238000007580 dry-mixing Methods 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 125000005619 boric acid group Chemical group 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 229910021487 silica fume Inorganic materials 0.000 claims description 3
- 230000008961 swelling Effects 0.000 claims description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims 1
- 229910052796 boron Inorganic materials 0.000 claims 1
- 230000002349 favourable effect Effects 0.000 abstract description 4
- 239000004566 building material Substances 0.000 abstract description 2
- 239000002956 ash Substances 0.000 description 20
- 239000004372 Polyvinyl alcohol Substances 0.000 description 6
- 239000013039 cover film Substances 0.000 description 6
- 229920002451 polyvinyl alcohol Polymers 0.000 description 6
- 239000005864 Sulphur Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 238000013329 compounding Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000009408 flooring Methods 0.000 description 3
- 239000006004 Quartz sand Substances 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910001653 ettringite Inorganic materials 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000003469 silicate cement Substances 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 235000011128 aluminium sulphate Nutrition 0.000 description 1
- 230000003487 anti-permeability effect Effects 0.000 description 1
- 239000011182 bendable concrete Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 150000002085 enols Chemical class 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
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
- C04B28/065—Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
-
- 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
-
- 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
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)
Abstract
The invention belongs to building material fields.A kind of morning strong lower shrinkage high tenacity cement base engineering material, it is characterized in that it comprising sulphate aluminium cement, Portland cement, silicon ash, steel fibre, vinal, water, water-reducing agent, early strength agent, retarder and river sand raw material by being prepared, the content of each raw material is：460 ~ 500kg/m of sulphate aluminium cement3, 50 ~ 70kg/m of Portland cement3, 50 ~ 70kg/m of silicon ash3, 40 ~ 60kg/m of steel fibre3, 8 ~ 10kg/m of vinal3, 200 ~ 220kg/m of water3, 7.0 ~ 7.4kg/m of water-reducing agent3, 0.2 ~ 0.22kg/m of early strength agent3, 1.7 ~ 1.9kg/m of retarder3, 1180 ~ 1220kg/m of river sand3.Cement base engineering material favorable working performance obtained, early strength are high, later strength increases big, and mechanical property, volume stability are excellent, and toughness is high, have good mechanical property and endurance quality, actual application value big.
Description
Technical field
The invention belongs to building material fields, and in particular to a kind of morning strong lower shrinkage high tenacity cement base engineering material and its
Preparation method.
Background technology
Cement base engineering material (engineered cementitious composite, ECC) is to be based on microphysics power
Learn principle optimization design a kind of Novel engineering cement-base composite material, by Univ Michigan-Ann Arbor USA Li Victor C in
It takes the lead in the 1990s putting forward its design concept.It is using special organic synthetic fibers as one of main material, in addition special
Different allocating technology is made, and has tension more better than traditional cement-based material, wear-resisting, toughness, acid and alkali-resistance, compactness, anti-
A series of high-quality characteristics such as impact, obtain in the engineerings such as Concrete Protective Cover, floorings reparation, non-telescope floorings
Relatively broad application.
But there is also own shortcomings for common cement base engineering material：1) itself does not contain coarse aggregate, and cement slurry contains
Amount is big, shrinks greatly, easily causes repair layer and base's unsticking and cracking；2) PVA fibers contents are high, and viscosity is big, is not easy to construct；3) at
This height.
These disadvantages limit it and quickly repair the large-scale application in field in concrete structure.
Invention content
The purpose of the present invention is to provide strong lower shrinkage high tenacity cement base engineering material of a kind of morning and preparation method thereof, systems
The favorable working performance of cement base engineering material, early strength is high, later strength increase it is big, have good mechanical property and
Endurance quality.
To achieve the above object, the technical solution used in the present invention is：A kind of morning strong lower shrinkage high tenacity cement base work
Journey material, it is characterised in that it is by fine comprising sulphate aluminium cement, Portland cement, silicon ash, steel fibre, polyvinyl alcohol
Dimension, water, water-reducing agent, early strength agent, retarder and river sand raw material are prepared, and the content of each raw material is：Sulphate aluminium cement 460~
500kg/m3, 50~70kg/m of Portland cement3, 50~70kg/m of silicon ash3, 40~60kg/m of steel fibre3, polyvinyl alcohol
8~10kg/m of fiber3, 200~220kg/m of water3, 7.0~7.4kg/m of water-reducing agent3, 0.2~0.22kg/m of early strength agent3, retarder
1.7~1.9kg/m3, 1180~1220kg/m of river sand3。
According to said program, the sulphate aluminium cement is R.SAC42.5 sulphate aluminium cements, specific surface area >=400m2/
Kg, 0.08mm tail over≤10.0%, 0.2%≤28d free swelling rate≤0.4%.
According to said program, the Portland cement (i.e. portland cement) is PO42.5 portland cements, compares table
Area >=300m2/kg。
According to said program, the silicon ash is SILICA FUME, specific surface area >=20000m2/ kg, activity index >=90%.
According to said program, the steel fibre be the short silk steel fibre of copper facing, diameter 0.2mm, length 10mm, tensile strength >=
1800MPa, elasticity modulus >=200MPa.
According to said program, the length of the vinal is 12mm, draw ratio 316, fracture strength >=
1600MPa, elasticity modulus >=28GPa.
According to said program, the water-reducing agent be ultra-dispersed viscosity reduction polycarboxylic acid series high efficiency water reducing agent, molecular formula be (-
CH2CR1COOM-)x{CH2CR1COO-[(CH2CH2O)n]-R2}y, molecular weight 15000~20000, x=25~40, y=30~
45, n=10~15.
According to said program, the early strength agent is lithium carbonate, technical grade, content >=98% (quality).
According to said program, the retarder is boric acid, technical grade, content >=98% (quality).
According to said program, the river sand clay content be 0% (quality), grain size be not more than 1.18mm, fineness modulus≤
1.7, apparent density≤2700kg/m3。
The preparation method of above-mentioned strong lower shrinkage high tenacity cement base engineering material of a kind of morning, it is characterised in that including following step
Suddenly：
1) it is by the content of each raw material：460~500kg/m of sulphate aluminium cement3, 50~70kg/ of Portland cement
m3, 50~70kg/m of silicon ash3, 40~60kg/m of steel fibre3, 8~10kg/m of vinal3, 200~220kg/m of water3, subtract
7.0~7.4kg/m of aqua3, 0.2~0.22kg/m of early strength agent3, 1.7~1.9kg/m of retarder3, 1180~1220kg/ of river sand
m3, weigh raw material；
2) part water is taken to be heated into warm water (temperature of the warm water be 45~60 DEG C), respectively by early strength agent (lithium carbonate) and
Retarder (boric acid) dissolves that { dosage of water enough dissolves just, in total Water (200~220kg/m of water in warm water3) within, do not have
It is strict with, obtain Lithium carbonate solution and boric acid solution；
3) sulphate aluminium cement, Portland cement, silicon ash and river sand are subjected to mixing dry mixing 1min, are mixed
Material；Remaining water (water for deducting dissolving lithium carbonate and boric acid), water-reducing agent are added in gained mixture, stirs 2-3min,
Mixture slurry is made；
4) steel fibre and vinal are homogeneously added into mixture slurry respectively, stirring 3min to assorted fibre
It is evenly dispersed in mixture slurry, obtains fibrous mixture slurry；
5) Lithium carbonate solution and boric acid solution are added in the fibrous mixture slurry obtained by step 4), stir 1min；
6) 5) gained slurry is poured into die for molding, demoulds, is conserved after standing 4~5h, obtain early strong lower shrinkage
High tenacity cement base engineering material.
The principle of the present invention is：It is cementitious material preparation cement base engineering material usually to select portland cement at present, but
It is that silicate cement hydration thermal discharge is big, contraction is also larger, thus dry-shrinkage deformed big as the ECC of glue material preparation using it, is not suitable for
As patching material.And although sulphate aluminium cement has the characteristics that early strong, hydrated product ettringite expansion compensation is shunk,
Later strength growth is small, is also unsuitable for preparing cement base engineering material separately as glue material.Silicon ash has as mineral admixture
Stronger pozzolanic activity and Micro-aggregate filling effect can improve the microstructure after gelling slurry hardening, significantly improve power
Learn performance and endurance quality.Therefore the characteristics of sulphate aluminium cement is early strong, freeze proof, anti-permeability performance is good, microdilatancy and silicic acid are combined
Salt cement later stage high-strength characteristic makees cementitious material using portland cement, sulphate aluminium cement and silicon ash compounding, to realize
Superposition in performance and complementation.The reaction equation of cementitious material is as follows：
C2S+2H=C-S-H (gel)+CH (1-2)
C3A+CH+12H=C4A·H13 (1-3)
C3S+3H=C-S-H (gel)+2CH (1-4)
AH3(gel)+3CH+3CSH2=C3A·3CSH32 (1-5)
SiO2+ CH=C-S-H (1-6)
And by compounding slow setting accelerating component, being adjusted using ultra-dispersed viscosity reduction high efficiency water reducing agent improves cement base engineering material
Working performance and early mechanics characteristics, mix low-elasticity-modulus steel fibre and high-elastic modulus polyvinyl alcohol fibre, play activeness and quietness and subtract
The effect of contracting, design prepare early strong lower shrinkage high tenacity cement base engineering material.
Early-strength lower shrinkage high tenacity cement base engineering material utilizes sulphate aluminium cement hydrated product microdilatancy
Characteristic replaces part Portland cement, inside mixes reactive mineral components silicon ash, compounds slow setting accelerating component, and application is ultra-dispersed
Viscosity reduction high efficiency water reducing agent, hybrid fiber, vinal are prepared.Cement base engineering material working performance obtained
Good, early strength height, later strength increase greatly, and mechanical property, volume stability are excellent, and toughness is high.The present invention significantly changes
It has been apt to cement base engineering material and has shunk easily cause repair layer and base's unsticking greatly and cracking, viscosity are not easy to construct greatly, are of high cost
Disadvantage has important practical application meaning.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) it uses sulphate aluminium cement to replace part portland cement, plays the complementary advantage of the two performance superposition, utilize
The characteristics of sulphate aluminium cement hydrated product ettringite early strong, microdilatancy and passing through, which compounds to adjust, coagulates component and realizes cement base engineering material
Early strong, the low-shrinkage energy of material, enhances the durability of interfacial adhesion, can be applied in quick reparation field, widen water
The application range of mud base engineering material；
(2) it using the expensive high-elastic modulus polyvinyl alcohol fibre in cheap low-elasticity-modulus steel fibre substitution part, both played
The performance effect and dimensional effect of assorted fibre, it is comprehensive to improve activeness and quietness Reduce shrinkage effect, and significantly reduce raw material
Cost；
(3) preparation process is simple, replaces quartz sand using thin river sand, reduces cost；Efficiently subtracted using ultra-dispersed viscosity reduction
Aqua disperse cement particles reduce the cohesiveness of slurry, and cement base engineering material favorable working performance obtained, early strength is high,
And there is good mechanical property and endurance quality, it applies in floorings are quickly repaired, it can be achieved that Rapid-Repair, quickly logical
Vehicle.
Specific implementation mode
For a better understanding of the present invention, with reference to the embodiment content that the present invention is furture elucidated, but the present invention
Content is not limited solely to the following examples.
In following embodiments：The sulphate aluminium cement is R.SAC42.5 sulphate aluminium cements, specific surface area >=400m2/
Kg, 0.08mm tail over≤10.0%, 0.2%≤28d free swelling rate≤0.4%.Portland cement (the i.e. silicic acid
Salt cement) it is PO42.5 portland cements, specific surface area >=300m2/kg.The silicon ash be SILICA FUME, specific surface area >=
20000m2/ kg, activity index >=90%.The steel fibre is the short silk steel fibre of copper facing, diameter 0.2mm, length 10mm, tension
Intensity >=1800MPa, elasticity modulus >=200MPa.The length of the vinal is 12mm, and draw ratio 316, fracture is by force
Degree >=1600MPa, elasticity modulus >=28GPa.The water-reducing agent is ultra-dispersed viscosity reduction polycarboxylic acid series high efficiency water reducing agent.The morning is strong
Agent is lithium carbonate, technical grade, content >=98% (quality).The retarder is boric acid, technical grade, content >=98% (quality).
The river sand clay content is 0% (quality), and grain size is not more than 1.18mm, fineness modulus≤1.7, apparent density≤2700kg/m3。
Embodiment 1：
A kind of morning strong lower shrinkage high tenacity cement base engineering material, the weight proportion (kg/m of each raw material3) be：Water 210, sulphur
Aluminate cement 480, Portland cement 60, silicon ash 60, steel fibre 50, vinal 10, water-reducing agent 7.2 are early strong
Agent 0.21, retarder 1.8, river sand 1200.
A kind of preparation method of above-mentioned strong lower shrinkage high tenacity cement base engineering material of morning, includes the following steps：
1) raw material is weighed according to above-mentioned raw materials proportioning；
2) part water is taken to be heated into warm water (temperature of the warm water be 45~60 DEG C), respectively by early strength agent (lithium carbonate) and
Retarder (boric acid) dissolves in warm water, obtains Lithium carbonate solution and boric acid solution；
3) sulphate aluminium cement, Portland cement, silicon ash and river sand are subjected to mixing dry mixing 1min, are mixed
Material；Remaining water (water for deducting dissolving lithium carbonate and boric acid), water-reducing agent are added in gained mixture, stirs 2-3min,
Mixture slurry is made；
4) steel fibre and vinal are homogeneously added into mixture slurry respectively, stirring 3min to assorted fibre
It is evenly dispersed in mixture slurry, obtains fibrous mixture slurry；
5) Lithium carbonate solution and boric acid solution are added in the fibrous mixture slurry obtained by step 4), stir 1min；
6) 5) gained slurry is poured into die for molding, smoothes out, cover film, demoulds, conserved after standing 4~5h,
Obtain early strong lower shrinkage high tenacity cement base engineering material.
The match ratio of morning strong lower shrinkage high tenacity cement base engineering material manufactured in the present embodiment is shown in Table 1, working performance, power
It learns performance and endurance quality parameter is shown in Table 2 and table 3.
Embodiment 2：
A kind of morning strong lower shrinkage high tenacity cement base engineering material, the weight proportion (kg/m of each raw material3) be：Water 220, sulphur
Aluminate cement 470, Portland cement 70, silicon ash 60, steel fibre 60, vinal 8, water-reducing agent 7, early strength agent
0.2, retarder 1.7, river sand 1200.
A kind of preparation method of above-mentioned strong lower shrinkage high tenacity cement base engineering material of morning, includes the following steps：
1) raw material is weighed according to above-mentioned raw materials proportioning；
2) part water is taken to be heated into warm water (temperature of the warm water be 45~60 DEG C), respectively by early strength agent (lithium carbonate) and
Retarder (boric acid) dissolves in warm water, obtains Lithium carbonate solution and boric acid solution；
3) sulphate aluminium cement, Portland cement, silicon ash and river sand are subjected to mixing dry mixing 1min, are mixed
Material；Remaining water (water for deducting dissolving lithium carbonate and boric acid), water-reducing agent are added in gained mixture, stirs 2-3min,
Mixture slurry is made；
4) steel fibre and vinal are homogeneously added into mixture slurry respectively, stirring 3min to assorted fibre
It is evenly dispersed in mixture slurry, obtains fibrous mixture slurry；
5) Lithium carbonate solution and boric acid solution are added in the fibrous mixture slurry obtained by step 4), stir 1min；
6) 5) gained slurry is poured into die for molding, smoothes out, cover film, demoulds, conserved after standing 4~5h,
Obtain early strong lower shrinkage high tenacity cement base engineering material.
The match ratio of morning strong lower shrinkage high tenacity cement base engineering material manufactured in the present embodiment is shown in Table 1, working performance, power
It learns performance and endurance quality parameter is shown in Table 2 and table 3.
Embodiment 3：
A kind of morning strong lower shrinkage high tenacity cement base engineering material, the weight proportion (kg/m of each raw material3) be：Water 200, sulphur
Aluminate cement 490, Portland cement 60, silicon ash 50, steel fibre 50, vinal 9, water-reducing agent 7.1, early strength agent
0.22, retarder 1.8, river sand 1210.
A kind of preparation method of above-mentioned strong lower shrinkage high tenacity cement base engineering material of morning, includes the following steps：
1) raw material is weighed according to above-mentioned raw materials proportioning；
2) part water is taken to be heated into warm water (temperature of the warm water be 45~60 DEG C), respectively by early strength agent (lithium carbonate) and
Retarder (boric acid) dissolves in warm water, obtains Lithium carbonate solution and boric acid solution；
3) sulphate aluminium cement, Portland cement, silicon ash and river sand are subjected to mixing dry mixing 1min, are mixed
Material；Remaining water (water for deducting dissolving lithium carbonate and boric acid), water-reducing agent are added in gained mixture, stirs 2-3min,
Mixture slurry is made；
4) steel fibre and vinal are homogeneously added into mixture slurry respectively, stirring 3min to assorted fibre
It is evenly dispersed in mixture slurry, obtains fibrous mixture slurry；
5) Lithium carbonate solution and boric acid solution are added in the fibrous mixture slurry obtained by step 4), stir 1min；
6) 5) gained slurry is poured into die for molding, smoothes out, cover film, demoulds, conserved after standing 4~5h,
Obtain early strong lower shrinkage high tenacity cement base engineering material.
The match ratio of morning strong lower shrinkage high tenacity cement base engineering material manufactured in the present embodiment is shown in Table 1, working performance, power
It learns performance and endurance quality parameter is shown in Table 2 and table 3.
Embodiment 4：
A kind of morning strong lower shrinkage high tenacity cement base engineering material, the weight proportion (kg/m of each raw material3) be：Water 200, sulphur
Aluminate cement 460, Portland cement 50, silicon ash 70, steel fibre 50, vinal 8, water-reducing agent 7.1, early strength agent
0.22, retarder 1.8, river sand 1220.
A kind of preparation method of above-mentioned strong lower shrinkage high tenacity cement base engineering material of morning, includes the following steps：
1) raw material is weighed according to above-mentioned raw materials proportioning；
2) part water is taken to be heated into warm water (temperature of the warm water be 45~60 DEG C), respectively by early strength agent (lithium carbonate) and
Retarder (boric acid) dissolves in warm water, obtains Lithium carbonate solution and boric acid solution；
3) sulphate aluminium cement, Portland cement, silicon ash and river sand are subjected to mixing dry mixing 1min, are mixed
Material；Remaining water (water for deducting dissolving lithium carbonate and boric acid), water-reducing agent are added in gained mixture, stirs 2-3min,
Mixture slurry is made；
4) steel fibre and vinal are homogeneously added into mixture slurry respectively, stirring 3min to assorted fibre
It is evenly dispersed in mixture slurry, obtains fibrous mixture slurry；
5) Lithium carbonate solution and boric acid solution are added in the fibrous mixture slurry obtained by step 4), stir 1min；
6) 5) gained slurry is poured into die for molding, smoothes out, cover film, demoulds, conserved after standing 4~5h,
Obtain early strong lower shrinkage high tenacity cement base engineering material.
The match ratio of morning strong lower shrinkage high tenacity cement base engineering material manufactured in the present embodiment is shown in Table 1, working performance, power
It learns performance and endurance quality parameter is shown in Table 2 and table 3.
Embodiment 5：
A kind of morning strong lower shrinkage high tenacity cement base engineering material, the weight proportion (kg/m of each raw material3) be：Water 220, sulphur
Aluminate cement 480, Portland cement 60, silicon ash 70, steel fibre 50, vinal 8, water-reducing agent 7, early strength agent
0.21, retarder 1.9, river sand 1180.
A kind of preparation method of above-mentioned strong lower shrinkage high tenacity cement base engineering material of morning, includes the following steps：
1) raw material is weighed according to above-mentioned raw materials proportioning；
2) part water is taken to be heated into warm water (temperature of the warm water be 45~60 DEG C), respectively by early strength agent (lithium carbonate) and
Retarder (boric acid) dissolves in warm water, obtains Lithium carbonate solution and boric acid solution；
3) sulphate aluminium cement, Portland cement, silicon ash and river sand are subjected to mixing dry mixing 1min, are mixed
Material；Remaining water (water for deducting dissolving lithium carbonate and boric acid), water-reducing agent are added in gained mixture, stirs 2-3min,
Mixture slurry is made；
4) steel fibre and vinal are homogeneously added into mixture slurry respectively, stirring 3min to assorted fibre
It is evenly dispersed in mixture slurry, obtains fibrous mixture slurry；
5) Lithium carbonate solution and boric acid solution are added in the fibrous mixture slurry obtained by step 4), stir 1min；
6) 5) gained slurry is poured into die for molding, smoothes out, cover film, demoulds, conserved after standing 4~5h,
Obtain early strong lower shrinkage high tenacity cement base engineering material.
The match ratio of morning strong lower shrinkage high tenacity cement base engineering material manufactured in the present embodiment is shown in Table 1, working performance, power
It learns performance and endurance quality parameter is shown in Table 2 and table 3.
The embodiment 6 of comparison
A kind of common cement-base engineering material, the weight proportion (kg/m of each component3) be：Water 370, Portland cement
900, flyash 100, quartz sand 900, ordinary water-reducing agent 10, vinal 26.
The preparation method of the common cement-base engineering material includes：According to above-mentioned raw materials proportioning weigh raw material, by cement,
Flyash and vinal mixing dry mixing 1min make cementitious material be sufficiently mixed uniformly with vinal, then add
Enter water, water-reducing agent stirring 4min, so that slurry is sufficiently stirred, mixture slurry is poured into die for molding, smooth out, cover film, it is quiet
It sets and demoulds afterwards for 24 hours, conserved, obtain the common cement-base engineering material.
The match ratio of common cement-base engineering material described in the present embodiment is shown in Table 1, working performance, mechanical property and durability
Energy parameter is shown in Table 2 and table 3.
Table 1 prepares general for the early strong lower shrinkage high tenacity cement base engineering material and embodiment 6 of Examples 1 to 5 preparation
The match ratio of logical cement base engineering material.
1 Examples 1 to 6 cement base engineering material match ratio (kg/m of table3)
By early strong lower shrinkage high tenacity cement base engineering material made from Examples 1 to 5 and light water made from embodiment 6
The working performance and mechanical property of mud base engineering material are tested, and the results are shown in Table 2.
The working performance and mechanical property parameters of cement base engineering material made from 2 Examples 1 to 6 of table
2 explanation of table：Compared with common cement-base engineering material, early strong lower shrinkage high tenacity cement base work prepared by the present invention
Journey material favorable working performance, early strength are high, illustrate using ultra-dispersed viscosity reduction high efficiency water reducing agent and the steel fibre substitution poly- second in part
The viscosity of cement base engineering material slurry can be effectively reduced under both enol fibers collective effect, improve cement base engineering material
Working performance；Also illustrate retarder and early strength agent compounding, can effectively adjust cement base engineering material setting time but also
Ensure higher early strength, meets the requirement of fast repairing material high-early-strength.
Compared with common cement-base engineering material, after early strong lower shrinkage high tenacity cement base engineering material prepared by the present invention
Phase mechanical property is good, and bent toughness is suitable.Illustrate that low-elasticity-modulus steel fibre and high-elastic modulus polyvinyl alcohol fibre mix and can have complementary advantages,
The performance effect and dimensional effect of the two are given full play in mortar, it is comprehensive to improve toughening, enhancing effect.
By early strong lower shrinkage high tenacity cement base engineering material made from Examples 1 to 5 and light water made from embodiment 6
The volume stability and endurance quality of mud base engineering material are tested, and are calculated folk prescription cost, be the results are shown in Table 3.
Volume stability, endurance quality and the cost parameter of cement base engineering material made from 3 Examples 1 to 6 of table
3 explanation of table：Compared with common cement-base engineering material, early strong lower shrinkage high tenacity cement base work prepared by the present invention
Journey material has good endurance quality；It is dry-shrinkage deformed small, it is the 1/9 of common cement-base engineering material, shows to use aluminium sulfate
Cement compound silicate cement and silicon ash do cementitious material, can significantly improve the volume stability of cement base engineering material；It is single
Side is at low cost, has saved 60% cost of raw material, and economic benefit is apparent, has preferable actual application value.
Detect working performance, the mechanical property of early strong lower shrinkage high tenacity cement base engineering material prepared by Examples 1 to 5
With endurance quality parameter, as a result shows early strong lower shrinkage high tenacity cement base engineering material prepared by the present invention, have good
Mechanical property, volume stability and endurance quality, actual application value are big.
The bound value of each raw material and technological parameter of the present invention, interval value can realize the present invention, herein not
Enumerate embodiment.
Claims (5)
1. a kind of morning strong lower shrinkage high tenacity cement base engineering material, it is characterised in that it is by including sulphate aluminium cement, common
Portland cement, silicon ash, steel fibre, vinal, water, water-reducing agent, early strength agent, retarder and river sand raw material prepare and
At the content of each raw material is：460~500kg/m of sulphate aluminium cement3, 50~70kg/m of Portland cement3, silicon ash 50~
70kg/m3, 40~60kg/m of steel fibre3, 8~10kg/m of vinal3, 200~220kg/m of water3, water-reducing agent 7.0~
7.4kg/m3, 0.2~0.22kg/m of early strength agent3, 1.7~1.9kg/m of retarder3, 1180~1220kg/m of river sand3；
The sulphate aluminium cement is R.SAC42.5 sulphate aluminium cements, specific surface area >=400m2/ kg, 0.08mm tail over≤
10.0%, 0.2%≤28d free swelling rate≤0.4%；
The Portland cement is PO42.5 portland cements, specific surface area >=300m2/kg；
The silicon ash is SILICA FUME, specific surface area >=20000m2/ kg, activity index >=90%；
The steel fibre is the short silk steel fibre of copper facing, diameter 0.2mm, length 10mm, tensile strength >=1800MPa, elasticity modulus
≥200MPa；
The length of the vinal is 12mm, draw ratio 316, fracture strength >=1600MPa, elasticity modulus >=28GPa.
2. strong lower shrinkage high tenacity cement base engineering material of a kind of morning according to claim 1, which is characterized in that described to subtract
Aqua is ultra-dispersed viscosity reduction polycarboxylic acid series high efficiency water reducing agent.
3. strong lower shrinkage high tenacity cement base engineering material of a kind of morning according to claim 1, which is characterized in that the morning
Strong agent is lithium carbonate, technical grade, content >=98% (quality).
4. strong lower shrinkage high tenacity cement base engineering material of a kind of morning according to claim 1, which is characterized in that described slow
Solidifying agent is boric acid, technical grade, content >=98% (quality)；The river sand clay content is 0% (quality), and grain size is not more than
1.18mm, fineness modulus≤1.7, apparent density≤2700kg/m3。
5. a kind of preparation method of strong lower shrinkage high tenacity cement base engineering material of morning according to claim 1, feature
It is to include the following steps：
1) it is by the content of each raw material：460~500kg/m of sulphate aluminium cement3, 50~70kg/m of Portland cement3, silicon
50~70kg/m of ash3, 40~60kg/m of steel fibre3, 8~10kg/m of vinal3, 200~220kg/m of water3, water-reducing agent
7.0~7.4kg/m3, 0.2~0.22kg/m of early strength agent3, 1.7~1.9kg/m of retarder3, 1180~1220kg/m of river sand3, claim
Take raw material；
2) it takes part water to be heated into warm water, early strength agent and retarder is dissolved in warm water respectively, obtain Lithium carbonate solution and boron
Acid solution；
3) sulphate aluminium cement, Portland cement, silicon ash and river sand are subjected to mixing dry mixing, obtain mixture；In gained
Remaining water, water-reducing agent are added in mixture, stirs, mixture slurry is made；
4) steel fibre and vinal are homogeneously added into mixture slurry respectively, stir, obtains fibrous mixing
Slurry；
5) Lithium carbonate solution and boric acid solution are added in the fibrous mixture slurry obtained by step 4), stirring；
6) 5) gained slurry is poured into die for molding, demoulds, is conserved after standing 4~5h, obtain early strong lower shrinkage high-ductility
Property cement base engineering material.
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| CN106477992A (en) * | 2016-10-08 | 2017-03-08 | 黄志义 | A kind of compensation shrinks high ductility cement-base composite material |
| CN107140921A (en) * | 2017-06-29 | 2017-09-08 | 上海罗洋新材料科技有限公司 | A kind of high ductility cement-base composite material of super hardening and preparation method thereof |
| CN107558364A (en) * | 2017-09-29 | 2018-01-09 | 中交公路长大桥建设国家工程研究中心有限公司 | A kind of low drying shrinkage cement-based material bridge deck pavement structure of ultra-tough and construction method |
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| CN110451901B (en) * | 2019-09-02 | 2022-03-29 | 东南大学 | Super-early-strength high-ductility low-shrinkage mortar and preparation method thereof |
| CN110803906B (en) * | 2019-11-28 | 2022-07-22 | 广州市北二环交通科技有限公司 | Ultrahigh-performance repair concrete based on sulphoaluminate-portland cement system |
| CN111116149A (en) * | 2019-12-25 | 2020-05-08 | 中国京冶工程技术有限公司 | High-strength fiber-reinforced cement-based composite material and preparation method and application thereof |
| CN111285629B (en) * | 2020-03-24 | 2021-02-12 | 天津水泥工业设计研究院有限公司 | Low-shrinkage ultrahigh-performance concrete and preparation method thereof |
| CN111574164A (en) * | 2020-05-26 | 2020-08-25 | 南京梦联桥材料科技有限公司 | Rapid repairing material for super-early-strength shrinkage compensation road bridge and preparation method thereof |
| CN112811876A (en) * | 2021-02-04 | 2021-05-18 | 广州市泰和混凝土有限公司 | Super early strength concrete and preparation method thereof |
| CN112830745A (en) * | 2021-03-03 | 2021-05-25 | 唐山昱邦新型建材有限公司 | High-ductility repair mortar with micro-expansibility and preparation method thereof |
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