CN107434384B - A kind of high-performance fiber concrete of C50 strength grade and preparation method thereof - Google Patents
A kind of high-performance fiber concrete of C50 strength grade and preparation method thereof Download PDFInfo
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- CN107434384B CN107434384B CN201710702347.4A CN201710702347A CN107434384B CN 107434384 B CN107434384 B CN 107434384B CN 201710702347 A CN201710702347 A CN 201710702347A CN 107434384 B CN107434384 B CN 107434384B
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- 239000004567 concrete Substances 0.000 title claims abstract description 101
- 229920006253 high performance fiber Polymers 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 48
- 235000007164 Oryza sativa Nutrition 0.000 claims abstract description 41
- 235000009566 rice Nutrition 0.000 claims abstract description 41
- 239000002956 ash Substances 0.000 claims abstract description 37
- 239000010881 fly ash Substances 0.000 claims abstract description 28
- 229920003043 Cellulose fiber Polymers 0.000 claims abstract description 27
- 229920000642 polymer Polymers 0.000 claims abstract description 25
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 23
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 22
- 239000004568 cement Substances 0.000 claims abstract description 22
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims abstract description 20
- 239000004576 sand Substances 0.000 claims abstract description 19
- 239000000203 mixture Substances 0.000 claims abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000002131 composite material Substances 0.000 claims abstract description 10
- 229910052742 iron Inorganic materials 0.000 claims abstract description 7
- 241000209094 Oryza Species 0.000 claims description 40
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 28
- 239000007864 aqueous solution Substances 0.000 claims description 28
- 238000003756 stirring Methods 0.000 claims description 25
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 17
- 239000002994 raw material Substances 0.000 claims description 15
- 238000000465 moulding Methods 0.000 claims description 14
- WBYWAXJHAXSJNI-UHFFFAOYSA-N cinnamic acid Chemical compound OC(=O)C=CC1=CC=CC=C1 WBYWAXJHAXSJNI-UHFFFAOYSA-N 0.000 claims description 13
- 238000001723 curing Methods 0.000 claims description 13
- 239000000839 emulsion Substances 0.000 claims description 13
- 239000012752 auxiliary agent Substances 0.000 claims description 12
- 238000012423 maintenance Methods 0.000 claims description 12
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 10
- 239000001110 calcium chloride Substances 0.000 claims description 10
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 10
- 239000010903 husk Substances 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 9
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 9
- 235000011152 sodium sulphate Nutrition 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 9
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 8
- 229910001018 Cast iron Inorganic materials 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 238000009736 wetting Methods 0.000 claims description 6
- 239000004746 geotextile Substances 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- 235000019738 Limestone Nutrition 0.000 claims description 3
- 239000011398 Portland cement Substances 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 239000006028 limestone Substances 0.000 claims description 3
- 229920005646 polycarboxylate Polymers 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 2
- 229920000620 organic polymer Polymers 0.000 claims description 2
- 229920000058 polyacrylate Polymers 0.000 claims description 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims 1
- 235000011941 Tilia x europaea Nutrition 0.000 claims 1
- 150000001735 carboxylic acids Chemical class 0.000 claims 1
- 239000004571 lime Substances 0.000 claims 1
- 238000006116 polymerization reaction Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 230000007812 deficiency Effects 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 240000007594 Oryza sativa Species 0.000 abstract 1
- 239000011150 reinforced concrete Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 13
- 230000000694 effects Effects 0.000 description 11
- 239000002689 soil Substances 0.000 description 8
- 239000011575 calcium Substances 0.000 description 5
- 238000011161 development Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 239000004035 construction material Substances 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 239000008399 tap water Substances 0.000 description 3
- 235000020679 tap water Nutrition 0.000 description 3
- GADSJKKDLMALGL-UHFFFAOYSA-N 2-propylbenzoic acid Chemical compound CCCC1=CC=CC=C1C(O)=O GADSJKKDLMALGL-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 239000002154 agricultural waste Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000002742 anti-folding effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical class [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 2
- 235000013339 cereals Nutrition 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- -1 ethyl alcohol Amine Chemical class 0.000 description 2
- 239000004574 high-performance concrete Substances 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 239000006210 lotion Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000010148 water-pollination Effects 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Natural products CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229920001410 Microfiber Polymers 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 101710198474 Spike protein Proteins 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000037427 ion transport Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003658 microfiber Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000007785 strong electrolyte Substances 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 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
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
-
- 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)
- Revetment (AREA)
Abstract
The invention discloses high-performance fiber concrete of a kind of C50 strength grade and preparation method thereof, the mass parts composition of the concrete is as follows: 330-350 parts of cement, 160-175 parts of water, 710-730 parts of river sand, 1010-1030 parts of rubble, 90-130 parts of flyash, 20-50 parts of rice hull ash, 5-7 parts of water-reducing agent, 8-9 parts of economization agent, 12-14 parts of exciting agent, 1.1-1.7 parts of cellulose fibre, 12-15 parts of Carboxy polymer, 1.7-1.8 parts of defoaming agent.The concrete of preparation toughness with higher and excellent endurance quality, the adhesion strength with higher between fashioned iron, for in reinforced concrete composite structure, the cooperative work performance between fashioned iron and concrete can be effectively played, the deficiency that bond between steel and concrete performance is poor, is unable to give full play the respective mechanical property of the two is made up.
Description
Technical field
The invention belongs to the field of building materials, are a kind of tools for mixing cellulose fibre, rice hull ash and Carboxy polymer
Have higher toughness, high-durability, high volume stability concrete, and in particular to a kind of high-performance fiber of C50 strength grade
Concrete and preparation method thereof.
Background technique
The annual output of China's silicon ash only has 3000t-4000t, can only meet the needs of part special concrete, limit it
It is a large amount of to use.And China, as large agricultural country, annual rice husk yield accounts for 30% of Gross World Product or more in 40,000,000 t or more.
Currently, most rice husk still can be stacked naturally or open incineration in addition to part rice husk starts for power plants generating electricity, this
Both waste of resource, burning can discharge great amount of carbon dioxide pollution surrounding enviroment to sample again.Rice hull ash for power plants generating electricity is being passed through
The rice hull ash specific gravity generated after power generation is smaller, if unreasonable development will also result in land occupation resource, pollution periphery sky
Gas.As scientific and technological progress is found, rice husk is burned under suitable condition and contains 90%-96% in the rice hull ash for preparing
Amorphous Si O2, specific surface area even can reach 250m2/kg。
Normal concrete and high-performance concrete material cracking resistance are poor, low (it typically is compression strength for tensile strength
), therefore, brittleness is big, poor toughness, and brittleness is further obvious with the raising of strength grade of concrete.It is answered in height
Under power or complex stress condition, the Brittleness of concrete will reduce the bearing capacity of component and structure or even safe and reliable
Property.A certain amount of drying shrinkage and self-constriction can be also generated in course of hardening, and then generates certain micro-crack, to concrete
Intensity and endurance quality generate adverse effect.
Summary of the invention
The purpose of the present invention is to provide high-performance fiber concrete of a kind of C50 strength grade and preparation method thereof, benefits
It is easy to get material with market, using improved concrete stirring technology, is mixed by addition cellulose fibre, rice hull ash, active mineral
The deficiencies of closing material, chemical admixture etc., overcoming normal concrete brittleness big, easy to crack, durability is poor has high volume with preparation
The high-performance fiber concrete of the C50 strength grade of stability, high-durability and higher toughness.
To achieve the above object, technical solution disclosed by the invention is: a kind of high-performance fiber coagulation of C50 strength grade
Soil, the raw material including following mass fractions:
330-350 parts of cement, 160-175 parts of water, 710-730 parts of river sand, 1010-1030 parts of rubble, flyash 90-130
Part, 20-50 parts of rice hull ash, 5-7 parts of water-reducing agent, 8-9 parts of economization agent, 12-14 parts of exciting agent, 1.1-1.7 parts of cellulose fibre, carboxylic
12-15 parts of base styrene-butadiene polymer, 1.7-1.8 parts of defoaming agent.
Preferably, each component optimal match ratio content based on mass fraction in the concrete are as follows:
342 parts of cement, 166 parts of water, 714 parts of river sand, 1027 parts of rubble, 92 parts of flyash, 46 parts of rice hull ash, water-reducing agent
5.7 parts, 9.2 parts of economization agent, 13 parts of exciting agent, 1.5 parts of cellulose fibre, 14 parts of Carboxy polymer, 1.8 parts of defoaming agent.
Further, the cement is PO42.5R grades of ordinary portland cements, selection and poly carboxylic acid series water reducer compatibility
Good cement type.
Thick river sand during the river sand selection gradation is good, fineness modulus 2.8-3.0.
Rubble selection gradation is good, fine and close hard, the shaggy artificial rubble based on lime stone, partial size model
It encloses for 5-20mm, according to continuous size fraction gradation.
The flyash uses the high-quality I grade of flyash of power plant, and 45 μm of square hole screens are tailed over no more than 12%, and water demand ratio is not
Greater than 95%, specific surface area should be greater than 400m2/kg。
The rice hull ash be by rice husk 650-800 DEG C at a temperature of burn, be made using ball mill grinding 20-30min
Powder grey powder, dioxide-containing silica 93.6%, partial size are 10-75 μm, and specific surface area is in 40-100m2Between/g.
The water-reducing agent is polycarboxylate high performance water-reducing agent, and solid content 20%, water-reducing rate is 25% or more, to coagulation
The compression strength of soil does not have adverse effect.
The economization agent selects JM-SRA type economization agent.
The defoaming agent uses U.S.'s Hexion AXILAT DF6352DD defoaming agent.
Further, the rice hull ash be by rice husk 650-800 DEG C at a temperature of burn, using ball mill grinding 20-
Powder grey powder, dioxide-containing silica 93.6% is made in 30min, and partial size is 10-75 μm, and specific surface area is in 40-100m2/g
Between.
Further, the exciting agent uses Organic-inorganic composite exciting agent, multiple according to the raw material of following mass percent meters
With forming:
Sodium sulphate 60%-68%, calcium chloride 30%-38%, triethanolamine 1.5%-2%.
Further, the cellulose fibre is UF500 cellulose fibre, and length 2-3mm, diameter is 15-20 μm, and tension is strong
Degree >=900MPa, elasticity modulus >=8.5GPa, fracture elongation reach 10%, specific gravity 1.1g/cm3, have good hydrophilic
Property, higher bond stress and acid-proof alkaline.
Further, the Carboxy polymer is that had by what carboxyl styrene emulsion, water and auxiliary agent obtained after mixing
Machine polymer, raw material composition by percentage to the quality are as follows:
Carboxyl styrene emulsion 48%-50%, water 48%-50%, auxiliary agent 1%-2%.
Further, the carboxyl styrene emulsion solid content is 46%, and film-forming temperature is 15 DEG C, lotion pH=7.
Further, the auxiliary agent is polyacrylate defoaming agent.
The invention also discloses a kind of preparation methods of the high-performance fiber concrete of C50 strength grade, including walk as follows
It is rapid:
1) water-reducing agent that mass fraction is 5-7 parts is added in the water of total Water 25%, is denoted as aqueous solution 1；It will weigh
Good 8-9 part economization agent and 1.7-1.8 parts of defoaming agents is added in the water of total Water 25%, is denoted as aqueous solution 2；
It 2) will 710-730 parts of river sand weighed in mass ratio, 1010-1030 parts of rubbles and 1.1-1.7 parts of cellulose fibres
It is added in blender, uniform stirring 2-3min；
3) it is sharp that 330-350 parts of cement, 90-130 parts of flyash, 20-50 parts of rice hull ash and 12-14 parts then, are sequentially added
Agent is sent out, then the water of total Water remaining 50% is added in blender, uniform stirring 2-3min；
4) then to the aqueous solution 1 being added in blender in step 1), uniform stirring 3-4min；
5) mobility for finally observing mixture, continues the aqueous solution 2 and 12-15 parts of Carboxies that will be prepared in step 1)
Polymer is added in blender, uniform stirring 3-5min, is discharged to get prepared concrete mix is arrived；And it forms, support
Shield.
There are two types of methods with maintenance for the concrete formation that preparation method obtains:
1) standard curing: being poured into molding, jolt ramming in cast iron die for concrete batching system, is 20 ± 2 DEG C, phase in temperature
To 1d-2d is stood in the standard curing room of humidity >=95%, then demoulding conserves in standard curing room to required age.
2) it is conserved in water: concrete batching system being poured into molding, jolt ramming in cast iron die, being placed in temperature is 20 DEG C ± 2
DEG C environment in, test block surface covering wetting geotextiles, stand 1d, demoulding, then in the pond (pond of standard curing room
In be saturated limewater solution) in maintenance to required age.
The present invention is in order to overcome the brittleness and existing fiber concrete and cement of normal concrete and high performance concrete
The shortcomings that based composites, using the cellulose fibre with water storage function and toughening effect and with ultrafine micropore structure
Rice hull ash (rice hull ash with porous structure can absorb moisture), " the interior maintenance action " of two kinds of materials can promote cementitious material
Heat evolution velocity；In addition, on the one hand can control and reduce mixed by the way that Carboxy polymer and economization agent are added in concrete
The contraction of soil is coagulated, the micro-pore inside fill concrete improves concrete strength；On the other hand due to Carboxy polymer
It forms a film in inside concrete and wraps up hydrated product and unhydrated particle, discontinuous matrix reticular structure is formed, with cellulose fiber
Dimension synergistic effect improves the toughness of concrete, and then reduces Cl-、SO4 2-、CO2The intrusion of equal harmful ions, is finally reached raising
The intensity and endurance quality of concrete, and promote the target of its toughness, plasticity and tensile strength.The present invention passes through between each component
Synergistic effect cementitious material aquation can be promoted more abundant, improve the microcosmic composition of inside concrete, reduce detrimental voids
Quantity, keeps concrete inner structure more closely knit, and finally preparing has high intensity, high tenacity, high-durability, high volume stability
The novel high-performance fiber concrete material of property.
Compared with the prior art, the beneficial effects of the present invention are:
1) cellulose fibre used in the present invention has natural hydrophily and high-elastic model point, can effectively inhibit mixed
The formation and development of microcrack caused by the factors such as solidifying soil plastic shrinkage, drying shrinkage, temperature change；Cellulose fiber surface has very
Strong bond stress has good cementitiousness with cement matrix, prevents spike protein gene in concrete cracking, prevent crack
Further development, and the fracture of fiber can increase the energy dissipation capacity of concrete；In addition, cellulose fibre has unique fiber
Cavity structure and huge specific surface area, cavity structure can store partial moisture, play " interior maintenance action ", promote coagulation
The heat evolution velocity of soil.Therefore, it is resistance to can be improved mechanical property and cracking resistance, impervious and freeze thawing resistance of concrete etc. for cellulose fibre
Long performance.
2) silica for containing 90% or more in the present invention by the rice hull ash that combusting rice hull, grinding obtain, has higher
Pozzolanic activity, the particle of rice hull ash is tiny (particle be 10-75 μm), the porous and net road structure inside rice hull ash particle
Huge specific surface area is made it have, 40-100m can be reached2/g.Therefore, incorporation rice hull ash can make gelling material particles more
Uniformly, gradation is good, can play filling role, and then increase the cohesiveness of concrete；Secondly as big inside rice hull ash
The microcellular structure of amount can water storage, play " interior maintenance action "；In addition, since rice hull ash is living with volcanic ash similar with silicon ash
Property, the Ca (OH) in partially or completely silicon ash, with concrete system can be replaced2Reaction generates fine and close hard aquation sulphur aluminium
Sour calcium improves flexural strength, compression strength, the tensile splitting strength, endurance quality of concrete；Finally, rice hull ash is as agricultural
Waste material is used as construction material replacing partial cement after being processed to, can reduce due in rice husk burning and cement production process
CO2Discharge amount, and then concrete cost is reduced, it realizes the recycling of agricultural wastes, reaches energy-saving and environment-friendly purpose.
3) Carboxy polymer used can be improved toughness of concrete, endurance quality and concrete and type in the present invention
Adhesion strength between steel.Firstly, the wetting that a large amount of surface reactive material can increase surface of aggregate in this kind of polymer is made
With the cementitiousness that improvement is gathered materials between matrix effectively prevents the formation and development of microcrack and initial imperfection；In addition, should
The continuous net-shaped structure of the space three-dimensional of quasi polymer is equivalent to microfibre in concrete, can enhance the anti-folding of concrete, resist
Curved intensity improves the toughness of concrete；Polymer can hole inside fill concrete, reduce harmful hole number, improve mixed
The compaction rate of soil is coagulated, and then improves the endurance quality of concrete.
4) economization agent used can be mixed to control by reducing the surface tension of the water of pore in concrete in the present invention
Coagulate drying shrinkage, volume contraction and the plastic shrinkage of hardened early etc. of soil.Based on capillary tension theory, mixed in concrete suitable
The economization agent of amount can reduce the surface tension of the water of pore in concrete, to reach reduction concrete shrinkage deformation, improve mixed
The anti-crack ability of soil is coagulated, and then improves the endurance quality of concrete.
5) exciting agent in the present invention uses Organic-inorganic composite exciting agent, is by sodium sulphate, calcium chloride and three ethyl alcohol
Amine excites flyash activity jointly.Sodium sulphate is embodied in the excitation of flyash, SO4-In Ca2+Under effect, with fly ash grain
The gel on surface and the AlO being dissolved in liquid phase2-Reaction generates hydrated calcium aluminate sulfate AFt；In addition, SO4 2-Also aquation can be displaced
Part SO in calcium silicates4 2-, the SO that displaces4 2-Outer layer again and Ca2+Effect generates hydrated calcium silicate, persistently excites flyash
Activity.Calcium chloride is to the excitation of flyash then mainly by improving Ca in aquation system2+Concentration forms aquation chloro-aluminate
Gelling is mutually and drated calcium aluminate is come what is realized, and in addition to this, calcium chloride can also supplement sulphate activation powder as strong electrolyte
Ca needed for coal ash active process2+, promote the excitation of flyash activity.Triethanolamine is excited as organic flyash activity
Agent can promote the corrosion on fly ash grain surface and make by from Fe, Al phase being complexed in flyash in hydration process
The further aquation of active material in flyash.Synergistic effect between sodium sulphate, calcium chloride and triethanolamine can be sufficient
Flyash activity is excited, the hydration rate of cementitious material in quickening system promotes the generation of hydrated product, and then improves concrete
Intensity, endurance quality etc..
Above-mentioned measure can effectively improve compression strength, toughness, deformability, the endurance quality etc. of concrete, and enhance
Adhesion strength and cooperative transformation ability between concrete and fashioned iron.The C50 intensity that the method is prepared through the invention
The high-performance fiber concrete of grade, the flexural strength of the high-performance fiber concrete are not less than 12.87MPa, and 28d cube is anti-
Compressive Strength is not less than 52.09MPa, and tensile splitting strength is not less than not less than the adhesion strength between 5.54MPa, with fashioned iron
3.37MPa, 28d chloride diffusion coefficient are not more than 94 × 10-14m2/ s, 28d drying shrinkage are not more than 0.008%.This hair
Bright to have prepared the high-performance fiber concrete with high volume stability, high-durability and high tenacity, raw material are easy to get, make
Standby simple process meets the requirement of sustainable development and the application of Modern Green construction material and popularization, is a kind of environmentally protective
Novel high-performance fiber concrete material.
Specific embodiment
With reference to embodiment, the present invention is described in further detail using embodiment, so that advantage of the invention is easier to
In the protection scope for being readily appreciated by one skilled in the art, but being not intended to restrict the invention.
The high-performance fiber concrete of C50 strength grade of the present invention, is prepared using following methods:
1) water-reducing agent that mass fraction is 5-7 parts is added in the water of total Water 25%, is denoted as aqueous solution 1；It will weigh
Good 8-9 part economization agent and 1.7-1.8 parts of defoaming agents is added in the water of total Water 25%, is denoted as aqueous solution 2；
It 2) will 710-730 parts of river sand weighed in mass ratio, 1010-1030 parts of rubbles and 1.1-1.7 parts of cellulose fibres
It is added in blender, uniform stirring 2-3min；
3) it is sharp that 330-350 parts of cement, 90-130 parts of flyash, 20-50 parts of rice hull ash and 12-14 parts then, are sequentially added
Agent is sent out, then the water of total Water remaining 50% is added in blender, uniform stirring 2-3min；
4) then to the aqueous solution 1 being added in blender in step 1), uniform stirring 3-4min；
5) mobility for finally observing mixture, continues the aqueous solution 2 and 12-15 parts of Carboxies that will be prepared in step 1)
Polymer is added in blender, uniform stirring 3-5min, is discharged to get prepared concrete mix is arrived；And it forms, support
Shield.
Wherein:
Cement used is commercially available PO42.5 grades of ordinary portland cement, is had with poly carboxylic acid series water reducer good compatible
Property.
River sand used is that fineness modulus is thick river sand in 2.9, apparent density 2.59g/cm3, bulk density is
1.48g/cm3。
Rubble used is fine and close hard, shaggy lime stone, partial size 5-20mm, and uniformly continuous gradation is apparent close
Degree is 2.7g/cm3, bulk density 1.51g/cm3。
Flyash used is the high-quality I grade of flyash of power plant, and 0.045mm square hole screen is tailed over no more than 12%, large specific surface area
In 400m2/ kg, partial size is in 5-20 μ m.
Rice hull ash used be by rice husk 650 DEG C -800 DEG C at a temperature of through burning, using ball mill grinding 20-
Powder grey powder, dioxide-containing silica 93.6% is made in 30min, and partial size is 10-75 μm, and specific surface area is in 40-100m2/g
Between.
Water-reducing agent used is polycarboxylate high performance water-reducing agent, and solid content 20%, pH value 8.0, water-reducing rate is 25%
More than, 7d, 28d compressive strength rate are not less than 150%.
Economization agent used is the JM-SRA type economization agent that Architecture Science Inst. of Jiangsu Prov. develops.
Exciting agent used uses Organic-inorganic composite exciting agent, compounds according to the raw material of following mass percent meters:
Sodium sulphate 65.7%, calcium chloride 32.7%, triethanolamine 1.6%.
Defoaming agent used uses U.S.'s Hexion AXILAT DF6352DD defoaming agent.
Cellulose fibre used is the UF500 cellulose fibre of U.S. Burkeye company research and development, which is that hydrophily is fine
It ties up, fibre length 2-3mm, 15-20 μm of diameter, tensile strength >=900MPa, elasticity modulus >=8GPa, fracture elongation reaches
10%.
Carboxy polymer used is the organic polymer obtained after mixing by carboxyl styrene emulsion, water and auxiliary agent
Object, raw material composition by percentage to the quality are as follows:
Carboxyl styrene emulsion 49%, water 50%, auxiliary agent 1%.
Wherein, carboxyl styrene emulsion solid content is 46%, and film-forming temperature is 15 DEG C, lotion pH=7.Auxiliary agent is polyacrylic acid
Ester defoaming agent.
Different embodiments are given below to further illustrate the present invention.
Embodiment 1
The high-performance fiber concrete of the present embodiment C50 strength grade, in the high-performance fiber concrete each component with
The match ratio content that mass fraction calculates is as follows: 330 parts of cement, 160 parts of tap water, 710 parts of river sand, 1030 parts of rubble, fine coal
130 parts of ash, 20 parts of rice hull ash, 5 parts of water-reducing agent, 8 parts of economization agent, 14 parts of exciting agent, 1.1 parts of cellulose fibre, carboxyl propyl benzene are poly-
Close 15 parts of object, 1.7 parts of defoaming agent.
Wherein:
The raw material of composite exciting agent mass percent meter: sodium sulphate 68%, calcium chloride 30%, triethanolamine 2%.
The raw material of Carboxy polymer by percentage to the quality is as follows:
Carboxyl styrene emulsion 50%, water 48%, auxiliary agent 2%.
Above-mentioned each component is prepared into concrete by the following method:
1) water-reducing agent is added in 25% aqueous solution, is denoted as aqueous solution 1；Load weighted economization agent and defoaming agent are added
Enter in 25% water, is denoted as aqueous solution 2；
2) it is added in blender river sand, rubble, cellulose fibre is weighed in mass ratio, uniform stirring 2-3min；
3) a part cement, flyash, rice hull ash and exciting agent then, are sequentially added, 50% water is added in blender,
Uniform stirring 2-3min；
4) then to the aqueous solution 1 being added in blender in step 1), uniform stirring 3-4min；
5) mobility of mixture is finally observed, the aqueous solution 2 and Carboxy polymer prepared in step 1) uniformly stir
3-5min is mixed, is discharged, prepared concrete mix, molding, maintenance are obtained.
The molding with maintenance process of concrete are as follows in the present embodiment:
Concrete batching system is poured into cast iron die and is formed, 10s is vibrated using shake table, uses vibrating head edge later
Die trial outer wall carries out contact vibration, bubble extra in concrete batching system is discharged；After molding, test block, which is placed in temperature, is
In 20 ± 5 DEG C of environment, in the geotextiles of test block surface covering wetting, 1d is stood, demoulding, then temperature is 20 ± 2 DEG C, relatively
Humidity >=95% conserves in standard curing room to required age.
Embodiment 2
The high-performance fiber concrete of the present embodiment C50 strength grade, each component is with quality in high-performance fiber concrete
The match ratio content that score calculates is as follows: 350 parts of cement, 175 parts of tap water, 730 parts of river sand, 1010 parts of rubble, flyash 90
Part, 50 parts of rice hull ash, 7 parts of water-reducing agent, 9 parts of economization agent, 12 parts of exciting agent, 1.7 parts of cellulose fibre, carboxyl propyl benzene polymer 12
Part, 1.8 parts of defoaming agent.
Wherein:
The raw material of composite exciting agent mass percent meter: sodium sulphate 60%, calcium chloride 38%, triethanolamine 2%.
The raw material of Carboxy polymer by percentage to the quality is as follows:
Carboxyl styrene emulsion 48%, water 50%, auxiliary agent 2%.
Above-mentioned each component is prepared into concrete by the following method:
1) water-reducing agent is added in 25% aqueous solution, is denoted as aqueous solution 1；Load weighted economization agent and defoaming agent are added
Enter in 25% water, is denoted as aqueous solution 2；
2) it is added in blender river sand, rubble, cellulose fibre is weighed in mass ratio, uniform stirring 2-3min；
3) a part cement, flyash, rice hull ash and exciting agent then, are sequentially added, 50% water is added in blender,
Uniform stirring 2-3min；
4) then to the aqueous solution 1 being added in blender in step 1), uniform stirring 3-4min；
5) mobility of mixture is finally observed, the aqueous solution 2 and Carboxy polymer prepared in step 1) uniformly stir
3-5min is mixed, is discharged, prepared concrete mix, molding, maintenance are obtained.
The molding with maintenance process of concrete are as follows in the present embodiment:
Concrete batching system is poured into cast iron die and is formed, 10s is vibrated using shake table, uses vibrating head edge later
Die trial outer wall carries out contact vibration, bubble extra in concrete batching system is discharged；After molding, test block, which is placed in temperature, is
In 20 ± 5 DEG C of environment, in the geotextiles of test block surface covering wetting, 1d, demoulding, then in the pond of standard curing room are stood
It conserves in (being saturated limewater solution in pond, coolant-temperature gage is 20 ± 2 DEG C) to required age.
Embodiment 3
The high-performance fiber concrete of the present embodiment C50 strength grade, in the high-performance fiber concrete each component with
The match ratio content that mass fraction calculates is as follows: 342 parts of cement, 166 parts of tap water, 714 parts of river sand, 1027 parts of rubble, fine coal
Grey 92 parts, 46 parts of rice hull ash, 5.7 parts of water-reducing agent, 9.2 parts of economization agent, 13 parts of exciting agent, 1.5 parts of cellulose fibre, Carboxy
14 parts of polymer, 1.8 parts of defoaming agent.
Wherein:
The raw material of composite exciting agent mass percent meter: sodium sulphate 65.5%, calcium chloride 33%, triethanolamine 1.5%.
The raw material of Carboxy polymer by percentage to the quality is as follows:
Carboxyl styrene emulsion 49%, water 50%, auxiliary agent 1%.
Above-mentioned each component is prepared into concrete by the following method:
1) water-reducing agent is added in 25% aqueous solution, is denoted as aqueous solution 1；Load weighted economization agent and defoaming agent are added
Enter in 25% water, is denoted as aqueous solution 2；
2) it is added in blender river sand, rubble, cellulose fibre is weighed in mass ratio, uniform stirring 2-3min；
3) a part cement, flyash, rice hull ash and exciting agent then, are sequentially added, 50% water is added in blender,
Uniform stirring 2-3min；
4) then to the aqueous solution 1 being added in blender in step 1), uniform stirring 3-4min；
5) mobility of mixture is finally observed, the aqueous solution 2 and Carboxy polymer prepared in step 1) uniformly stir
3-5min is mixed, is discharged, prepared concrete mix, molding, maintenance are obtained.
The molding with maintenance process of concrete are as follows in the present embodiment:
Concrete batching system is poured into cast iron die and is formed, 10s is vibrated using shake table, uses vibrating head edge later
Die trial outer wall carries out contact vibration, bubble extra in concrete batching system is discharged；After molding, test block, which is placed in temperature, is
In 20 ± 5 DEG C of environment, in the geotextiles of test block surface covering wetting, 1d is stood, demoulding, then temperature is 20 ± 2 DEG C, relatively
Humidity >=95% conserves in standard curing room to required age.
The performance test results of the high-performance fiber concrete of different C50 strength grades manufactured in the present embodiment are given below
It is as shown in table 1:
The high-performance fiber concrete test result of the C50 strength grade of 1 embodiment 1-3 of table
As can be seen from the above Table 1, in embodiment 3 concrete best performance.Moreover, C50 strength grade of the present invention
The 28d cubic compressive strength of high-performance fiber concrete is not less than 52.09MPa, and split tensile strength is not less than 5.54MPa, anti-folding
Intensity is not less than 3.37MPa, 28d unstable state chloride ion transport coefficient not less than the adhesion strength between 12.87MPa, with fashioned iron
DRCMNo more than 94 × 10-14m2/ s, 28d drying shrinkage are not more than 0.008%.It can thus be seen that C50 prepared by the present invention
The high-performance fiber concrete of strength grade is a kind of concrete of good performance, can be used as Modern Green construction material and answers
With.
The above description is only an embodiment of the present invention, be in conjunction with specific optimal enforcement mode to it is of the invention it is further in detail
It describes in detail bright, cannot therefore limit the scope of the invention, those skill in the art related utilize present disclosure
With method, or under the premise of not departing from present inventive concept, simple change or replacement is made, all should be considered as of the invention
In protection scope.Protection scope of the present invention should be subject to the protection scope that disclosed claim defines.
Claims (6)
1. a kind of high-performance fiber concrete of C50 strength grade, which is characterized in that fiber concrete includes following mass fractions
Raw material:
330-350 parts of cement, 160-175 parts of water, 710-730 parts of river sand, 1010-1030 parts of rubble, 90-130 parts of flyash, rice
20-50 parts of shell ash, 5-7 parts of water-reducing agent, 8-9 parts of economization agent, 12-14 parts of exciting agent, 1.1-1.7 parts of cellulose fibre, carboxyl fourth
12-15 parts of benzene polymer, 1.7-1.8 parts of defoaming agent；
The rice hull ash be by rice husk 650-800 DEG C at a temperature of burn, using ball mill grinding 20-30min be made powder ash
Color powder, dioxide-containing silica 93.6%, partial size are 10-75 μm, and specific surface area is in 40-100m2Between/g；
The cellulose fibre is UF500 cellulose fibre, and length 2mm-3mm, diameter is 15 μm -20 μm, tensile strength >=
900MPa, elasticity modulus >=8.5GPa, fracture elongation reach 10%, specific gravity 1.1g/cm3；
The Carboxy polymer is the organic polymer obtained after mixing by carboxyl styrene emulsion, water and auxiliary agent, with
The raw material of mass percent meter is as follows:
Carboxyl styrene emulsion 48-50%, water 48-50%, auxiliary agent 1-2%；
The carboxyl styrene emulsion solid content is 46%, and film-forming temperature is 15 DEG C, carboxyl styrene emulsion pH=7；
The auxiliary agent is polyacrylate defoaming agent.
2. the high-performance fiber concrete of C50 strength grade according to claim 1, which is characterized in that the cement is
PO42.5R grades of ordinary portland cements, selection and the good cement type of poly carboxylic acid series water reducer compatibility；
Thick river sand during the river sand selection gradation is good, fineness modulus 2.8-3.0；
Rubble selection gradation is good, fine and close hard, the shaggy artificial rubble based on lime stone, and particle size range is
5mm-20mm；
The flyash uses the high-quality I grade of flyash of power plant, and 45 μm of square hole screens are tailed over no more than 12%, and water demand ratio is not more than
95%, specific surface area should be greater than 400m2/kg；
The water-reducing agent is polycarboxylate high performance water-reducing agent, and solid content 20%, the water-reducing rate of water-reducing agent is 25% or more；
The economization agent is JM-SRA type economization agent；
The defoaming agent uses U.S.'s Hexion AXILAT DF6352DD defoaming agent.
3. the high-performance fiber concrete of C50 strength grade according to claim 1, which is characterized in that the exciting agent
Using Organic-inorganic composite exciting agent, composite exciting agent is compounded according to the raw material of following mass percent meters:
Sodium sulphate 60-68%, calcium chloride 30-38%, triethanolamine 1.5-2%.
4. the high-performance fiber concrete of C50 strength grade according to claim 1, which is characterized in that the high-performance
The flexural strength of fiber concrete is not less than 12.87MPa, and 28d cubic compressive strength is not less than 52.09MPa, and Split-tension of Rolled is strong
Degree is not less than 3.37MPa not less than the adhesion strength between 5.54MPa, with fashioned iron, 28d chloride diffusion coefficient no more than 94 ×
10-14m2/ s, 28d drying shrinkage are not more than 0.008%.
5. a kind of preparation method of the high-performance fiber concrete of the described in any item C50 strength grades of claim 1-4, special
Sign is, includes the following steps:
1) water-reducing agent that mass fraction is 5-7 parts is added in the water of total Water 25%, is denoted as aqueous solution 1；It will be load weighted
8-9 parts of economization agents and 1.7-1.8 parts of defoaming agents are added in the water of total Water 25%, are denoted as aqueous solution 2；
2) 710-730 parts of river sand weighed in mass ratio, 1010-1030 parts of rubbles and 1.1-1.7 parts of cellulose fibres are added
Into blender, uniform stirring 2-3min；
3) 330-350 parts of cement, 90-130 parts of flyash, 20-50 parts of rice hull ash and 12-14 parts of exciting agents then, are sequentially added,
The water of total Water remaining 50% is added in blender again, uniform stirring 2-3min；
4) then to the aqueous solution 1 being added in blender in step 1), uniform stirring 3-4min；
5) mobility for finally observing mixture continues the aqueous solution 2 that will be prepared in step 1) and 12-15 parts of Carboxy polymerizations
Object is added in blender, uniform stirring 3-5min, is discharged to get prepared concrete mix is arrived；And it forms, conserve.
6. a kind of blanks and moulding and conserving method of the high-performance fiber concrete of any one of claim 1-4 C50 strength grade,
It is characterized in that, including maintenance process in standard curing and water:
The standard curing method are as follows: concrete batching system is poured into cast iron die molding, jolt ramming, temperature be 20 ± 2 DEG C,
1-2d is stood in the standard curing room of relative humidity >=95%, then demoulding conserves in standard curing room to required age；
Method of curing in the water are as follows: concrete batching system is poured into cast iron die molding, jolt ramming, be placed in temperature be 20 DEG C ±
In 2 DEG C of environment, in the geotextiles of test block surface covering wetting, 1d, demoulding, then in the saturation lime of standard curing room are stood
It conserves in the pond of aqueous solution to required age.
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| 羧基丁苯聚合物改性混凝土性能及其机理;姚红云等;《建筑材料学报》;20050228;第8卷(第1期);第30-36页 * |
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