CN110015867A - A kind of preparation method of high-performance concrete material for pipe pile - Google Patents
A kind of preparation method of high-performance concrete material for pipe pile Download PDFInfo
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- CN110015867A CN110015867A CN201910236014.6A CN201910236014A CN110015867A CN 110015867 A CN110015867 A CN 110015867A CN 201910236014 A CN201910236014 A CN 201910236014A CN 110015867 A CN110015867 A CN 110015867A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/29—Frost-thaw resistance
-
- 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]
Abstract
The present invention relates to a kind of preparation methods of high-performance concrete material for pipe pile, belong to building material technical field.The present invention extracts antifreeze protein from wheat bran, prepare a kind of antifreeze protein gel, cellulose whiskers are grafted to antifreeze protein gel as the filler of concrete material, using cement as raw material, in conjunction with coarse aggregate, fine aggregate, mineral admixture and filler, prepare high-performance concrete material for pipe pile, with good durability, antifreeze protein hinders ice-crystal growth by itself will be adsorbed onto ice crystal surface, so that the concrete material of preparation has good frost resistance, the addition of cellulose whiskers, so that the concrete material of preparation has high intensity, high-modulus and high elongation rate；The Cellulose nanocrystal being added in the present invention must have physical entanglement with cement molecule, and due to the linear type rigid structural of Cellulose nanocrystal palpus, these windings can be such that the tensile strength of concrete material improves.
Description
Technical field
The present invention relates to a kind of preparation methods of high-performance concrete material for pipe pile, belong to building material technical field.
Background technique
Prestressed high-strength concrete pile (PHC tubular pole) is to use pretensioned prestressing, de- using centrifugation in forming process
Water moulding process, through a kind of cross-section concrete of hollow cylinder made of normal pressure is steam-cured and the steam-cured secondary maintenance of high temperature and pressure
Component.PHC tubular pole can be made by static pressure method or hammering method its sink to underground become structures basis, have reliable in quality,
The advantages that economical and practical, adaptable, easy for construction, cost is lower, be widely used in industry and civil buildings, port and pier,
In the architectural engineerings such as water conservancy, railway, bridge.
The material system of PHC tubular pole is usually using levigate quartz sand as essential mineral admixture at present, in maintenance processes first
Enter autoclave curing after 90 DEG C or so progress atmospheric steam curings, tubular pile demoulding, the temperature of autoclave curing is 180 ~ 200
DEG C, pressure is about 1MPa.Under the conditions of current material system and maintaining process, 3 days compression strength of PHC tubular pole produced is logical
Chang Keda 80MPa can dispatch from the factory in-week and come into operation, and have many advantages, such as that with short production cycle, quality is stablized.However, with warp
The rapid development of Ji society, various energy resources consume rapidly, and energy shortage and environmental pollution just become restriction economic development
Key factor, and the critical issue for restricting world's sustainable development will be become.Maintenance thermal energy needed for the production of PHC tubular pole mainly comes
From in burning of coal, used autoclave energy consumption is huge.
Since PHC tubular pole intensity is high, endurance issues are often ignored.It is increasingly multiple however as concrete works form
Miscellaneous, the application range of tubular pole constantly expands, and can PHC tubular pole with being applicable in the adverse circumstances such as Yu Haiyang, cold, saline and alkaline, the big temperature difference
The civil engineering in area, the growing interest by experts and scholars and tradesman.Endurance issues of the existing scholar to tubular pole at present
Primary Study is carried out, result of study shows that there are endurance issues by the steam-cured PHC tubular pole of high temperature and pressure, as frost resistance is general
All over deficiency, erosion-resisting characteristics is poor etc., especially when production technology fluctuates, endurance issues are more prominent.PHC pipe
The endurance issues of stake and its material system, maintaining process etc. are closely related.
Under steam curing, hydrated product is quickly generated and leads to uneven distribution, and the hydrated product of hardening is at unhydrated
Grain surface is adhered to and forms fine and close protective layer, to prevent the further aquation of unhydrated particle.In the coagulation of mecystasis
There is gas phase, liquid phase and solid phases in soil, and wherein the thermal expansion coefficient of gas phase and liquid phase is much larger than solid phase, when concrete structure liter
Wen Shi, since the hot incompatibility of gas, liquid, solid three-phase leads to the coarsening and interfacial transition zone porosity of concrete hole structure
Increase.Insufficient aquation, hydrated product uneven distribution and deterioration of pore structure etc. are to lead to concrete knot under making condition
Structure later strength and the affected internal factor of durability.
Traditional PHC tubular pile production process includes that the tensioning of deformed bar, reinforcing bar enter mould, concreting, are centrifuged into
In the stages such as type, steam curing, demoulding, autoclave curing, wherein centrifugal forming, steam curing and autoclave curing are to PHC
The performance of tubular pole influences maximum.Atmospheric steam curing temperature is 80 ~ 100 DEG C, by it is quiet stop, heat up, four constant temperature, cooling ranks
Section, time are 6 hours or so.Reach demoulding strength and then carry out high temperature and pressure maintenance, pressure reaches 1MPa, temperature 180
DEG C or so, the time is 6 ~ 8 hours.A large amount of tobermorite crystal is formed after reaction under high pressure, in concrete, because of its tool
There are high-intensitive, high-fire resistance and very low thermal contraction performance, so PHC tubular pole intensity is greatly improved.
With application of the PHC tubular pole in civil engineering, bridge infrastructure and port engineering etc., on the one hand it is society
Meeting bring economic benefit gradually increases, but adverse effect and potential problems that on the other hand it is generated are also increasingly by people
Extensive concern.Therefore the inexorable trend that environmental protection, energy saving, safety in production have become social development develops novel height
Performance concrete material for pipe pile has important economic significance to the development of tubular pile industry.
Summary of the invention
The technical problems to be solved by the invention: it for the problem of existing PHC tubular pole durability deficiency, provides a kind of high
The preparation method of performance concrete material for pipe pile.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
(1) wheat bran is crushed, and crosses 100~120 meshes to get wheat bran powder, by wheat bran powder and 1mol/L
Mixed slurry is placed in a centrifuge by phosphate buffer solution mixing, stir process to get mixed slurry, and centrifugal treating is collected
Supernatant, in mass ratio 1: 5 precipitates 50% saturated ammonium sulfate and supernatant mixing, filters up to filter residue, in mass ratio 1:
Filter residue and deionized water are uniformly mixed dialyzate are concentrated by mixed liquor dialysis treatment to get dialyzate to get mixed liquor by 3
It is dried to get matrix；
(2) matrix, the phosphate buffer solution of 1mol/L, nano-cellulose whisker, initiator potassium persulfate potassium are taken, by matrix and
The phosphate buffer solution of 1mol/L mixes, and nanofiber is added to get suspension in 3~5min of ultrasonic disperse in suspension
Plain whisker and initiator potassium persulfate stir 40~50min at being 80~90 DEG C in temperature to get graft, graft are existed
In flowing water be quickly cooled down after, be placed in temperature be 3~5 DEG C at stand 20~for 24 hours, be crushed to get filler；
(3) cement, filler, coarse aggregate, fine aggregate river sand, polycarboxylic acid series high efficiency water reducing agent, mineral admixture, deionized water are taken,
Cement, filler, coarse aggregate, fine aggregate river sand, polycarboxylic acid series high efficiency water reducing agent, mineral admixture, deionized water are mixed, stirring
Processing carries out maintenance processing to get mixed mortar, by mixed mortar to get high-performance concrete material for pipe pile.
Stir process step described in step (1) are as follows: in mass ratio 1: 5 delays the phosphate of wheat bran powder and 1mol/L
Solution mixing is rushed, low whipping speed is that 1~2h is stirred under 300~400r/min.
Centrifugal treating step described in step (1) are as follows: mixed slurry is placed in a centrifuge, revolving speed be 3000~
3~5min is centrifuged under 4000r/min.
Dialysis treatment step described in step (1) are as follows: by the mixed liquor dialysis membrane for the relative molecular mass 3.5kDa that shuts off
To 10~12h of pure water dialysis.
Concentrate drying processing step described in step (1) are as follows: after dialyzate to be concentrated into the 1/2 of original volume, be placed in
Temperature is that 6~8h is freeze-dried at -30~-40 DEG C.
Matrix described in step (2), the phosphate buffer solution of 1mol/L, nano-cellulose whisker, initiator persulfuric acid
Ratio between potassium is respectively as follows: according to parts by weight, and it is slow to weigh 40~50 parts of matrixes, the phosphate of 50~80 parts of 1mol/L respectively
Rush solution, 20~30 parts of nano-cellulose whiskers, 1~3 part of initiator potassium persulfate.
The preparation step of coarse aggregate described in step (3) are as follows: in mass ratio 1: 1 by the rubble and 10~20mm of 5~10mm
Rubble mix to get coarse aggregate；The preparation step of mineral admixture are as follows: in mass ratio 1: 1 mixes flyash and mountain flour
It is even to get mineral admixture.
Cement described in step (3), filler, coarse aggregate, fine aggregate river sand, polycarboxylic acid series high efficiency water reducing agent, mineral blend
Ratio between material, deionized water is respectively as follows: according to parts by weight, weighs 40~60 parts of cement, 20~40 parts of fillers, 20 respectively
~30 parts of coarse aggregates, 20~30 parts of fine aggregate river sands, 1~5 part of polycarboxylic acid series high efficiency water reducing agent, 5~15 parts of mineral admixtures,
100~150 parts of deionized waters.
Stir process step described in step (3) are as follows: cement, filler, coarse aggregate, fine aggregate river sand, polycarboxylic-acid is high
Water-reducing agent, mineral admixture, deionized water mixing are imitated, low whipping speed is that 30~50min is stirred under 500~700r/min.
Maintenance processing step described in step (3) are as follows: mixed mortar is poured into 40mm × 40mm × 160mm mold,
At room temperature it is quiet stop 6~8h after, temperature be 80~90 DEG C at 6~8h of steam curing, be cooled to room temperature demoulding.
The present invention is compared with other methods, and advantageous effects are:
(1) present invention extracts antifreeze protein from wheat bran, prepares a kind of antifreeze protein gel, cellulose whiskers are grafted
Filler to antifreeze protein gel as concrete material, using cement as raw material, in conjunction with coarse aggregate, fine aggregate, mineral admixture
And filler, high-performance concrete material for pipe pile is prepared, there is good durability, antifreeze protein is by being adsorbed onto ice for itself
Brilliant surface is to hindering ice-crystal growth, so that the concrete material of preparation has a good frost resistance, the addition of cellulose whiskers,
So that the concrete material of preparation has high-intensitive, high-modulus and high elongation rate；
(2) concrete material prepared by the present invention is in crystallization process, and antifreeze protein can reduce the freezing point of solution, and its fusing point
(fusing point is normally close to 0 DEG C) is basically unchanged, and the difference between this freezing point and fusing point is known as heat stagnation activity；In crystallization process,
AFP is adsorbed on ice crystal surface, inhibits its growth by Kelvin effect.In general, ice crystal is during the growth process perpendicular to it
Surface will be adsorbed on ice crystal surface when there are AFP, and ice-crystal growth access is obstructed, therefore the curvature of ice crystal surface increases
Greatly, increasing its surface area, surface tension is caused to increase, the increase of ice crystal surface product also will make the balance of system change,
Leading to the freezing point of whole system reduces；
(3) Cellulose nanocrystal being added in the present invention must have physical entanglement with cement molecule, due to Cellulose nanocrystal palpus
Linear type rigid structural, these windings can be such that the tensile strength of concrete material improves；Nano-cellulose whisker length 10~
1000nm, cross sectional dimensions only have 5~20nm, and it is that a kind of size is thin that the ratio between length and cross sectional dimensions (draw ratio), which are 1: 100,
The fibrous material of small high-crystallinity, the cellulose whiskers with nanometer and micron-scale, possesses higher intensity and modulus；It receives
Rice cellulose whiskers crystallinity is high, hydrophily is strong, intensity is big, has special optical property, rheological property and mechanical performance, has
Extensive purposes；Especially it is with biocompatibility and biodegradability；
(4) mechanism of action of the mineral admixture added in the present invention in concrete mainly includes chemical reactivity, micro-aggregate
Effect, plasticization effect and interface enhancement；Wherein, chemical reactivity refers to that the active constituent in mineral admixture can be with cement water
Metaplasia at calcium hydroxide react, reduce hydrated product in calcium hydroxide content, increase hydrated gel content, improve coagulation
Soil mechanics performance and durability；Micro aggregate effect refers to that some microfine mineral admixtures play filling effect in cement-based material,
Realize the dense packing between solid particle, to improve the compactness of cement-based material, this effect is in extremely low water-cement ratio item
A key factor of super high strength concrete is prepared under part；Plasticization effect refers to the smooth spherical admixture in some surfaces, such as fine coal
Ash etc. can play the role of " ball bearing " in cement slurry, so as to improve the workability of fresh concrete, improve concrete
Working performance.
Specific embodiment
Wheat bran is crushed, and crosses 100~120 meshes to get wheat bran powder, in mass ratio 1: 5 by wheat bran
The mixing of the phosphate buffer solution of powder and 1mol/L, low whipping speed are that 1~2h is stirred under 300~400r/min to get mixing
Mixed slurry is placed in a centrifuge by slurry, is centrifuged 3~5min in the case where revolving speed is 3000~4000r/min, is collected supernatant,
50% saturated ammonium sulfate and supernatant are mixed and are precipitated by mass ratio 1: 5, are filtered up to filter residue, and in mass ratio 1: 3 by filter residue
It is uniformly mixed with deionized water to get mixed liquor, by mixed liquor with the dialysis membrane for the relative molecular mass 3.5kDa that shuts off to pure water
10~12h dialyse to get dialyzate, after dialyzate to be concentrated into the 1/2 of original volume, being placed in temperature is at -30~-40 DEG C
6~8h is freeze-dried to get matrix；According to parts by weight, the phosphoric acid of 40~50 parts of matrixes, 50~80 parts of 1mol/L are weighed respectively
Salt buffer solution, 20~30 parts of nano-cellulose whiskers, 1~3 part of initiator potassium persulfate, by the phosphate of matrix and 1mol/L
Nano-cellulose whisker and initiator is added to get suspension in buffer solution mixing, 3~5min of ultrasonic disperse in suspension
Potassium peroxydisulfate stirs 40~50min at being 80~90 DEG C in temperature to get graft, graft is quickly cooled down in flowing water
Afterwards, be placed in temperature be 3~5 DEG C at stand 20~for 24 hours, be crushed to get filler；In mass ratio 1: 1 mixes flyash and mountain flour
Uniformly the rubble of the rubble of 5~10mm and 10~20mm are mixed to get rough set to get mineral admixture, in mass ratio 1: 1
Material weighs 40~60 parts of cement, 20~40 parts of fillers, 20~30 parts of coarse aggregates, 20~30 parts thin collection according to parts by weight respectively
Expect river sand, 1~5 part of polycarboxylic acid series high efficiency water reducing agent, 5~15 parts of mineral admixtures, 100~150 parts of deionized waters, by cement,
Filler, coarse aggregate, fine aggregate river sand, polycarboxylic acid series high efficiency water reducing agent, mineral admixture, deionized water mixing, low whipping speed
To stir 30~50min under 500~700r/min to get mixed mortar, mixed mortar is poured into 40mm × 40mm × 160mm
In mold, at room temperature it is quiet stop 6~8h after, temperature be 80~90 DEG C at 6~8h of steam curing, be cooled to room temperature demoulding, i.e.,
Obtain high-performance concrete material for pipe pile.
Wheat bran is crushed, and is sieved with 100 mesh sieve to get wheat bran powder, in mass ratio 1: 5 by wheat bran powder and
The phosphate buffer solution of 1mol/L mixes, and low whipping speed is that 1h is stirred under 300r/min to get mixed slurry, by mixing slurry
Material is placed in a centrifuge, and is centrifuged 3min in the case where revolving speed is 3000r/min, is collected supernatant, in mass ratio 1: 5 is saturated sulphur for 50%
Sour ammonium and supernatant mixing are precipitated, and are filtered up to filter residue, in mass ratio 1: 3 is uniformly mixed filter residue and deionized water, i.e.,
Mixed liquor is obtained, uses the dialysis membrane for the relative molecular mass 3.5kDa that shuts off to pure water dialysis 10h to get dialyzate mixed liquor, it will
After dialyzate is concentrated into the 1/2 of original volume, being placed in temperature is that 6h is freeze-dried at -30 DEG C to get matrix；In parts by weight
Meter weighs phosphate buffer solution, 20 parts of nano-cellulose whiskers, the 1 part of initiator mistake of 40 parts of matrixes, 50 parts of 1mol/L respectively
Potassium sulfate mixes the phosphate buffer solution of matrix and 1mol/L, and ultrasonic disperse 3min is to get suspension, in suspension
Nano-cellulose whisker and initiator potassium persulfate is added, stirs 40min at being 80 DEG C in temperature to get graft, will be grafted
After object is quickly cooled down in flowing water, being placed in temperature is to stand 20h at 3 DEG C, is crushed to get filler；In mass ratio 1: 1 by flyash
It is uniformly mixed with mountain flour and mixes the rubble of the rubble of 5mm and 10mm to get rough set to get mineral admixture, in mass ratio 1: 1
Material, according to parts by weight, weighs 40 parts of cement, 20 parts of fillers, 20 parts of coarse aggregates, 20 parts of fine aggregate river sands, 1 part of polycarboxylic acids respectively
Series high-efficiency water-reducing agent, 5 parts of mineral admixtures, 100 parts of deionized waters, by cement, filler, coarse aggregate, fine aggregate river sand, polycarboxylic acids
Series high-efficiency water-reducing agent, mineral admixture, deionized water mixing, low whipping speed are that 30min is stirred under 500r/min to get mixing
Mortar pours into mixed mortar in 40mm × 40mm × 160mm mold, at room temperature it is quiet stop 6h after, temperature be 80 DEG C at
Steam curing 6h is cooled to room temperature demoulding to get high-performance concrete material for pipe pile.
Wheat bran is crushed, and crosses 110 meshes to get wheat bran powder, in mass ratio 1: 5 by wheat bran powder and
The phosphate buffer solution of 1mol/L mixes, and low whipping speed is that 1h is stirred under 350r/min to get mixed slurry, by mixing slurry
Material is placed in a centrifuge, and is centrifuged 4min in the case where revolving speed is 3500r/min, is collected supernatant, in mass ratio 1: 5 is saturated sulphur for 50%
Sour ammonium and supernatant mixing are precipitated, and are filtered up to filter residue, in mass ratio 1: 3 is uniformly mixed filter residue and deionized water, i.e.,
Mixed liquor is obtained, uses the dialysis membrane for the relative molecular mass 3.5kDa that shuts off to pure water dialysis 11h to get dialyzate mixed liquor, it will
After dialyzate is concentrated into the 1/2 of original volume, being placed in temperature is that 7h is freeze-dried at -35 DEG C to get matrix；In parts by weight
Meter weighs phosphate buffer solution, 25 parts of nano-cellulose whiskers, the 2 parts of initiator mistakes of 45 parts of matrixes, 65 parts of 1mol/L respectively
Potassium sulfate mixes the phosphate buffer solution of matrix and 1mol/L, and ultrasonic disperse 4min is to get suspension, in suspension
Nano-cellulose whisker and initiator potassium persulfate is added, stirs 45min at being 85 DEG C in temperature to get graft, will be grafted
After object is quickly cooled down in flowing water, being placed in temperature is to stand 22h at 4 DEG C, is crushed to get filler；In mass ratio 1: 1 by flyash
It is uniformly mixed with mountain flour and mixes the rubble of the rubble of 8mm and 15mm to get rough set to get mineral admixture, in mass ratio 1: 1
Material, according to parts by weight, weighs 50 parts of cement, 30 parts of fillers, 25 parts of coarse aggregates, 25 parts of fine aggregate river sands, 3 parts of polycarboxylic acids respectively
Series high-efficiency water-reducing agent, 10 parts of mineral admixtures, 125 parts of deionized waters, by cement, filler, coarse aggregate, fine aggregate river sand, poly- carboxylic
Sour series high-efficiency water-reducing agent, mineral admixture, deionized water mixing, low whipping speed are that 40min is stirred under 600r/min to get mixed
Close mortar, mixed mortar is poured into 40mm × 40mm × 160mm mold, at room temperature it is quiet stop 7h after, temperature be 85 DEG C
Lower steam curing 7h is cooled to room temperature demoulding to get high-performance concrete material for pipe pile.
Wheat bran is crushed, and crosses 120 meshes to get wheat bran powder, in mass ratio 1: 5 by wheat bran powder and
The phosphate buffer solution of 1mol/L mixes, and low whipping speed is that 2h is stirred under 400r/min to get mixed slurry, by mixing slurry
Material is placed in a centrifuge, and is centrifuged 5min in the case where revolving speed is 4000r/min, is collected supernatant, in mass ratio 1: 5 is saturated sulphur for 50%
Sour ammonium and supernatant mixing are precipitated, and are filtered up to filter residue, in mass ratio 1: 3 is uniformly mixed filter residue and deionized water, i.e.,
Mixed liquor is obtained, uses the dialysis membrane for the relative molecular mass 3.5kDa that shuts off to pure water dialysis 12h to get dialyzate mixed liquor, it will
After dialyzate is concentrated into the 1/2 of original volume, being placed in temperature is that 8h is freeze-dried at -40 DEG C to get matrix；In parts by weight
Meter weighs phosphate buffer solution, 30 parts of nano-cellulose whiskers, the 3 parts of initiator mistakes of 50 parts of matrixes, 80 parts of 1mol/L respectively
Potassium sulfate mixes the phosphate buffer solution of matrix and 1mol/L, and ultrasonic disperse 5min is to get suspension, in suspension
Nano-cellulose whisker and initiator potassium persulfate is added, stirs 50min at being 90 DEG C in temperature to get graft, will be grafted
After object is quickly cooled down in flowing water, being placed in temperature is to stand at 5 DEG C for 24 hours, is crushed to get filler；In mass ratio 1: 1 by flyash
It is uniformly mixed with mountain flour and mixes the rubble of the rubble of 10mm and 20mm to get thick to get mineral admixture, in mass ratio 1: 1
Gather materials, according to parts by weight, weighs 60 parts of cement, 40 parts of fillers, 30 parts of coarse aggregates, 30 parts of fine aggregate river sands, 5 parts of poly- carboxylics respectively
Sour series high-efficiency water-reducing agent, 15 parts of mineral admixtures, 150 parts of deionized waters by cement, filler, coarse aggregate, fine aggregate river sand, are gathered
High Efficient Diswater, mineral admixture, deionized water mixing, low whipping speed be 700r/min under stirring 50min to get
Mixed mortar pours into mixed mortar in 40mm × 40mm × 160mm mold, at room temperature it is quiet stop 8h after, temperature be 90
Steam curing 8h at DEG C is cooled to room temperature demoulding to get high-performance concrete material for pipe pile.
Reference examples: the concrete material for pipe pile of Dongguan company production.
The concrete material for pipe pile that embodiment and reference examples are prepared is detected, specific detection is as follows:
Compression strength: test method and step are according to GB/T50081-2002 " standard for test methods of mechanical properties of ordinary concrete "
It carries out.
Quick electric flux: carrying out according to ASTMC-1202 method, and electric flux test is using the limited public affairs of the durable great achievement science and technology in Beijing
The NJ-DTL concrete chlorine ion electric flux determinator of department is tested.
Fast freeze-thaw test: quick using the NJDR type microcomputer full-automatic concrete of the durable great achievement Science and Technology Ltd. in Beijing
Freezing-thawing test equipment carries out, and the quality and dynamic modulus of elasticity of test specimen are tested after every 50 Frozen-thawed cycleds, calculates the phase of test specimen
To dynamic modulus of elasticity and mass loss rate, when relative dynamic elastic modulus is lower than 60% or mass loss rate is more than 5%, or reach rule
When fixed freezing-thawing cycles, test is terminated.
Specific test result such as table 1.
1 performance characterization contrast table of table
As shown in Table 1, concrete material for pipe pile prepared by the present invention has good mechanical property and durability.
Claims (10)
1. a kind of preparation method of high-performance concrete material for pipe pile, it is characterised in that specific preparation step are as follows:
(1) wheat bran is crushed, and crosses 100~120 meshes to get wheat bran powder, by wheat bran powder and 1mol/L
Mixed slurry is placed in a centrifuge by phosphate buffer solution mixing, stir process to get mixed slurry, and centrifugal treating is collected
Supernatant, in mass ratio 1: 5 precipitates 50% saturated ammonium sulfate and supernatant mixing, filters up to filter residue, in mass ratio 1:
Filter residue and deionized water are uniformly mixed dialyzate are concentrated by mixed liquor dialysis treatment to get dialyzate to get mixed liquor by 3
It is dried to get matrix；
(2) matrix, the phosphate buffer solution of 1mol/L, nano-cellulose whisker, initiator potassium persulfate potassium are taken, by matrix and
The phosphate buffer solution of 1mol/L mixes, and nanofiber is added to get suspension in 3~5min of ultrasonic disperse in suspension
Plain whisker and initiator potassium persulfate stir 40~50min at being 80~90 DEG C in temperature to get graft, graft are existed
In flowing water be quickly cooled down after, be placed in temperature be 3~5 DEG C at stand 20~for 24 hours, be crushed to get filler；
(3) cement, filler, coarse aggregate, fine aggregate river sand, polycarboxylic acid series high efficiency water reducing agent, mineral admixture, deionized water are taken,
Cement, filler, coarse aggregate, fine aggregate river sand, polycarboxylic acid series high efficiency water reducing agent, mineral admixture, deionized water are mixed, stirring
Processing carries out maintenance processing to get mixed mortar, by mixed mortar to get high-performance concrete material for pipe pile.
2. a kind of preparation method of high-performance concrete material for pipe pile according to claim 1, it is characterised in that: step
(1) the stir process step described in are as follows: in mass ratio 1: 5 mixes the phosphate buffer solution of wheat bran powder and 1mol/L,
Low whipping speed is that 1~2h is stirred under 300~400r/min.
3. a kind of preparation method of high-performance concrete material for pipe pile according to claim 1, it is characterised in that: step
(1) the centrifugal treating step described in are as follows: mixed slurry is placed in a centrifuge, is centrifuged 3 in the case where revolving speed is 3000~4000r/min
~5min.
4. a kind of preparation method of high-performance concrete material for pipe pile according to claim 1, it is characterised in that: step
(1) the dialysis treatment step described in are as follows: by mixed liquor with the dialysis membrane for the relative molecular mass 3.5kDa that shuts off to pure water dialysis 10
~12h.
5. a kind of preparation method of high-performance concrete material for pipe pile according to claim 1, it is characterised in that: step
(1) the concentrate drying processing step described in are as follows: after dialyzate to be concentrated into the 1/2 of original volume, be placed in temperature be -30~-
6~8h is freeze-dried at 40 DEG C.
6. a kind of preparation method of high-performance concrete material for pipe pile according to claim 1, it is characterised in that: step
(2) phosphate buffer solution of matrix, 1mol/L described in, nano-cellulose whisker, the ratio between initiator potassium persulfate
Be respectively as follows: according to parts by weight, weigh respectively 40~50 parts of matrixes, the phosphate buffer solution of 50~80 parts of 1mol/L, 20~
30 parts of nano-cellulose whiskers, 1~3 part of initiator potassium persulfate.
7. a kind of preparation method of high-performance concrete material for pipe pile according to claim 1, it is characterised in that: step
(3) preparation step of the coarse aggregate described in are as follows: in mass ratio 1: 1 mixes the rubble of the rubble of 5~10mm and 10~20mm, i.e.,
Obtain coarse aggregate；The preparation step of mineral admixture are as follows: flyash and mountain flour are uniformly mixed and mix to get mineral by mass ratio 1: 1
Close material.
8. a kind of preparation method of high-performance concrete material for pipe pile according to claim 1, it is characterised in that: step
(3) cement, filler, coarse aggregate, fine aggregate river sand, polycarboxylic acid series high efficiency water reducing agent, mineral admixture, deionized water described in it
Between ratio be respectively as follows: according to parts by weight, weigh respectively 40~60 parts of cement, 20~40 parts of fillers, 20~30 parts of coarse aggregates,
20~30 parts of fine aggregate river sands, 1~5 part of polycarboxylic acid series high efficiency water reducing agent, 5~15 parts of mineral admixtures, 100~150 parts go from
Sub- water.
9. a kind of preparation method of high-performance concrete material for pipe pile according to claim 1, it is characterised in that: step
(3) the stir process step described in are as follows: by cement, filler, coarse aggregate, fine aggregate river sand, polycarboxylic acid series high efficiency water reducing agent, mineral
Admixture, deionized water mixing, low whipping speed are that 30~50min is stirred under 500~700r/min.
10. a kind of preparation method of high-performance concrete material for pipe pile according to claim 1, it is characterised in that: step
(3) the maintenance processing step described in are as follows: mixed mortar is poured into 40mm × 40mm × 160mm mold, it is quiet at room temperature to stop 6
After~8h, 6~8h of steam curing at being 80~90 DEG C in temperature is cooled to room temperature demoulding.
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