CN115057679B - Special 100MPa non-shrinkage base slurry for wind power steel-concrete tower and preparation method thereof - Google Patents
Special 100MPa non-shrinkage base slurry for wind power steel-concrete tower and preparation method thereof Download PDFInfo
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- CN115057679B CN115057679B CN202210990077.2A CN202210990077A CN115057679B CN 115057679 B CN115057679 B CN 115057679B CN 202210990077 A CN202210990077 A CN 202210990077A CN 115057679 B CN115057679 B CN 115057679B
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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
- 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
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
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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
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
Abstract
The invention discloses a 100MPa non-shrinkage seat slurry special for a wind power steel-concrete tower and a preparation method thereof.
Description
Technical Field
The invention belongs to the technical field of cement base slurry for wind power tower construction, and particularly relates to 100MPa non-shrinkage cement base slurry special for assembly joints of precast concrete tower sections of wind power steel-concrete tower engineering and a preparation method thereof.
Background
Wind energy has been developed in recent years as a clean energy source. The steel-concrete tower is widely applied to land wind energy structure facilities as a relatively mature structure form, but a series of key problems need to be solved in the construction process of a building, wherein the connection of a steel frame and a precast concrete tower section, the connection of precast concrete tower sections and the foundation grout between the precast concrete tower sections are one of weak links.
As a traditional connecting method, high strength, no shrinkage and high impermeability are the necessary performances of the seat slurry, and the characteristics of early strength, corrosion resistance and the like can be realized by matching with the use of various additives. In particular, excellent workability is one of the important indicators for the performance of a stock slurry. However, most of the currently popular base slurry in the market only has excellent cohesiveness and water retention, and is difficult to have the requirement of fluidity; or the material has excellent fluidity and is difficult to have excellent cohesiveness and water retention, and the material is wasted due to excessive vertical flow in the construction process.
The cross section of a tower cylinder of the wind power steel-concrete tower, which needs to be poured with the base slurry, is generally about 30cm, the pouring thickness of the base slurry is 3cm to 5cm, the tower cylinder is thin and not easy to sit and is solid, and the tower cylinder is thick and is easy to extrude to cause waste.
The construction performance characteristics of the base slurry are as follows:
(1) The pouring mode is that the well-stirred base slurry is discharged into a bucket, the bucket is lifted to the pouring place by a tower crane, and then the materials are uniformly distributed.
(2) Most of the mortar needed to be poured for connecting each tower barrel is 1-1.5 tons, the wind tower is generally in the field or in a mountain region, the stirring amount of the stirrer in each time is relatively small during actual construction, and the stirring can be completed only by 2 times of stirring and 2 times of pouring. Normally, more than 30 minutes are needed from the beginning of stirring to the completion of pouring each time, and if pouring is divided into 2 times, more than 1 hour is needed for connecting the whole section of setting slurry.
(3) From the aspect of construction performance, the problems encountered are also difficult problems to be solved, and mainly comprise: firstly, the working performance of the base slurry cannot change too much and not too viscous along with the time, and the base slurry is poured by using a bucket and is easy to discharge from the bucket; secondly, the base slurry has enough viscosity and good anti-sagging capability because the base slurry cannot flow too much; the surface of the base slurry can not be dehydrated too fast, a layer of hard shell can not be formed on the surface, and the base slurry has good plasticity and is convenient for base slurry extrusion; thirdly, the distribution of the whole section of the poured base slurry is uniform, and the strength development of the base slurry is consistent, so that the base slurry connection quality of the tower can be ensured.
The seat slurry hardening requirement is as follows: (1) The early strength is high, the compressive strength of the hardened slurry is more than 30MPa at 1d and more than 60MPa at 3d, and the normal operation of the next construction procedure, such as prestress tension and the like, is ensured. The later strength is continuously increased, and the 28d compressive strength is required to reach 80 to 100MPa; (2) Micro-expansion, dense filling and good durability, and can prevent rainwater from permeating to influence the structural performance.
Therefore, it is highly desirable to develop a foundation slurry which has high strength, no shrinkage, excellent workability, and good plasticity while maintaining cohesiveness and water retention properties to meet the requirement of fluidity.
CN114573308A discloses a base slurry for wind power steel-concrete tower mounting construction, which is prepared from cement, admixture, aggregate, composite expanding agent, water reducing agent, coagulation regulator, water-retaining agent, stearate, redispersible latex powder, defoaming agent, excitation regulator, rust inhibitor and antifreezing agent. The base slurry can adapt to the installation and construction of the wind power steel-concrete tower constructed at normal temperature and low temperature in winter, the surface of the base slurry is ensured to be in close contact with the surface of a tower barrel to the maximum extent, and the long-term safe and stable operation of a wind turbine is ensured, but other performances, particularly the strength and the plasticity of the base slurry need to be improved.
Disclosure of Invention
Aiming at the problems, the invention provides special 100MPa non-shrinkage base slurry for a wind power steel-concrete tower and a preparation method thereof. The base slurry is prepared from cement, basalt sand, ground glass powder, NC-P1 micro-expansion agent, micro-beads, thixotropic agent, plastic expansion agent, rubber powder, cellulose ether, water reducing agent and defoaming agent, has the characteristics of high strength and no shrinkage, has excellent workability, has good plasticity to meet the requirement of fluidity while ensuring cohesiveness and water retention, and realizes the overall optimization of three aspects of fluidity, water retention and cohesiveness.
The technical scheme of the invention is as follows: a special 100MPa non-shrinkage base slurry for a wind power steel-concrete tower is characterized by comprising the following components in parts by weight: 30-50 parts of cement, 40-60 parts of basalt sand, 3-6 parts of ground glass powder, 4-6 parts of NC-P1 micro-expansion agent, 1-3 parts of micro-beads, 0.1-0.15 part of thixotropic agent, 0.01-0.03 part of plastic expansion agent, 0.1-0.3 part of rubber powder, 0.05-0.1 part of cellulose ether, 0.15-0.3 part of water reducing agent and 0.05-0.15 part of defoaming agent.
The preparation method comprises the following steps: the powder is taken according to the parts by weight, water is added during use, and the mixture is uniformly mixed, wherein the mass ratio of the powder to the water is 1:0.10 to 0.12.
The preferable mixture ratio is as follows: 47 parts of cement, 40 parts of basalt sand, 4 parts of ground glass powder, 6 parts of NC-P1 micro-expansion agent, 3 parts of micro-beads, 0.15 part of thixotropic agent, 0.01 part of plastic expansion agent, 0.3 part of rubber powder, 0.1 part of cellulose ether, 0.30 part of water reducing agent and 0.1 part of defoaming agent.
Preferably, the cement is p.o.52.5 portland cement.
Preferably, the basalt sand is fine sand with fineness modulus of 1.6-2.2 and average grain diameter of 0.30-0.60 mm.
Preferably, the ground glass powder is prepared by grinding and processing urban solid waste glass, and the particle size is not more than 45 mu m.
Preferably, the NC-P1 micro-swelling agent is: ultra-fine sulphoaluminate cement clinker (D) 50 5 to 6 μm, D 90 No more than 20 mu m, and the specific surface area of the coating is 800 to 900m 2 /kg), flint clay and fluorgypsum, wherein the mass ratio of the superfine sulphoaluminate clinker to the flint clay to the fluorgypsum is 1.8-2.2: 1.8-2.2, preferably 1.
Preferably, the microbeads are aluminosilicate materials, and the average particle size of the perfect spherical powder materials is 1.5 mu m.
Preferably, the thixotropic agent is aluminium-magnesium silicate organic modified powder of aluminium-magnesium silicate modified by diethanolamine, and the preparation method comprises the following steps: (1) adding water into magnesium aluminum silicate powder to prepare a suspension; (2) Adding diethanolamine into the suspension, reacting at 70-90 deg.C for 6-10 hr, filtering, and washing; (3) Baking and crushing the washed product, and screening the crushed product through a 100-mesh screen to obtain the organic modified powder of the magnesium aluminum silicate. The microstructure is composed of silicate platelets about 1 nm thick and about 100 nm in diameter.
Preferably, the plastic expanding agent is azodicarbonamide (yellow powder).
Preferably, the rubber powder is vinyl acetate and ethylene copolymer rubber powder, or ethylene, vinyl chloride and vinyl laurate ternary copolymer rubber powder, or vinyl acetate, ethylene and fatty acid vinyl ester ternary copolymer rubber powder, and has high bonding capability, and can improve the plasticity and the workability of the seat slurry and the flexibility of the seat slurry.
Preferably, the cellulose ether is hydroxypropyl methylcellulose and has a viscosity of 10000mPa.s-16000mPa.s. Can improve the plasticity and the constructability of the seat sizing agent and improve the flexibility of the seat sizing agent.
Preferably, the water reducing agent is a reduction type polycarboxylic acid high-performance water reducing agent.
Preferably, the defoaming agent is a silicone powder defoaming agent. The defoaming agent can reduce harmful large bubbles and enable the hardened socket slurry to have higher strength.
The raw materials and the functions are as follows:
grinding glass powder: the addition of the glass powder reduces the dosage of cement, thereby reducing the economic and environmental cost; the incorporation of the glass frit can reduce the amount of water used to reduce the heat of hydration and improve the fluidity.
NC-P1 micro-swelling agent: an ettringite series mixed material compounded by superfine sulphoaluminate cement clinker, flint clay and fluorgypsum. Wherein the superfine sulphoaluminate cement clinker is anhydrous calcium sulphoaluminate (C) which is prepared by calcining limestone, alumina and gypsum serving as raw materials at low temperature (1300 to 1350 DEG) 4 A 3 S) and dicalcium silicate (C) 2 S) is clinker composed of main minerals, and the specific surface area of the clinker is 800 to 900m after grinding 2 In terms of/kg. Al in flint clay 2 O 3 The content is 40% -45%, and flint clay is preferably adopted as active Al 2 O 3 9% -10% of high-activity aluminum flint clay. Fluorgypsum is a by-product of hydrogen fluoride production using sulfuric acid and fluorsparIndustrial waste), but the calcium sulphate content is higher, generally above 90%, i.e. the sulphur trioxide content is at least around 53%. But because the waste is an industrial waste, has certain impurities and residual sulfuric acid, is used after being treated, changes waste into valuable, improves the ecological environment and has great social benefit. The NC-P1 micro-expansion agent is added into cement to generate hydration products of ettringite with increased volume, and the hydration products can fill and block capillary pores of a hardened body, change the pore structure and the pore gradation and improve the compactness of the hardened body under different action mechanisms of different crystal minerals at different periods and different magnitudes. Macroscopically, the hardened slurry generates volume expansion, the expansion can be converted into 0.5 to 1.0MPa of pre-stress under the constraint condition, a proper stress state can be formed in the hardened body, the shrinkage of the hardened body can be continuously compensated or reduced, and the filling bonding performance and the anti-permeability performance of the hardened slurry are ensured.
Microbeads: the micro-beads have compact surface layers and do not react with alkaline substances in the seat slurry in the early stage of cement hydration, so that the early-stage hydration heat of the seat slurry is reduced to achieve the purpose of no drying shrinkage, and the strength of the seat slurry is enhanced through the self-filling effect in the early stage; the micro-bead compact surface layer is reacted with alkaline substances in the seat slurry after being damaged in the later hydration period, so that the hydration reaction is continuously carried out, the compactness of the seat slurry is increased, and the later strength is improved. In addition, the incorporation of the microbeads can effectively improve the rheological property and thixotropy of the seat paste while reducing the water consumption, the hydration heat and the drying shrinkage.
Thixotropic agent: the thixotropic agent is doped to ensure that the base paste has excellent anti-sagging characteristic, the stability of the base paste can be improved, the negative effects of sagging of the base paste during construction and the like are overcome, and the thixotropy and the anti-sagging property of the base paste are improved. The common magnesium aluminum silicate particles are generally layered inorganic materials with negative charges, and in a cement dispersion system, the particles and cement particles with positive charges generate electrostatic adsorption and easily lose effects in the cement hydration process. The aluminum-magnesium silicate organic modified powder is aluminum-magnesium silicate modified by diethanolamine intercalation, and the potential of the aluminum-magnesium silicate organic modified powder is changed from negative to positive. In a cement dispersion system, the cement paste interacts with free silicate, sulfate and the like and is indirectly adsorbed on the surface of cement particles, so that the anti-vertical flow property of the cement paste is kept for a longer time, and the stability is higher. And simultaneously, the introduced diethanol amine can improve the compressive strength of the slurry.
Plastic swelling agent (azodicarbonamide): the cement admixture reacts with water under an alkaline condition to generate fine bubbles which are uniformly and densely distributed, so that the cement admixture generates plastic expansion, and the expansion rate of 3h is ensured.
The reduction type polycarboxylic acid high-performance water reducing agent comprises the following components: the introduction of the diethylene glycol monobutyl ether group with the shrinkage reducing effect can reduce the surface tension of the pore solution of the base slurry, reduce the additional compressive stress caused by the water loss of the pore solution and effectively reduce the shrinkage of the base slurry. The structure (schematic) of the reduction type polycarboxylate superplasticizer is shown below.
a=20-30，b=5-10，c=5-10，n=40-60。
The invention has the technical effects that:
1. the hardened base slurry has high densification, higher strength, impermeability and other durability
The invention utilizes the principle of ettringite mixed material and superfine powder DSP technology to highly densify the hardened base slurry. The micro-beads and the ground glass powder belong to superfine micro-powder and have the comprehensive effects of volcanic ash effect, micro-aggregate effect, water reducing effect, specific gravity effect and the like. The ettringite mixed material with different particle sizes, the micro-beads and the ground glass powder are compounded to form a gold-lapping effect with cement, so that the super-superposition effect of closest packing is achieved. The superfine powder can store large surface energy in the grinding process due to the huge surface area, and the compounding effect with the ettringite mixed material is very obvious.
The ettringite mixed material can generate a large amount of ettringite, and the superfine powder can reduce the calcium hydroxide which is an unfavorable component in a cement hydration product and generate more favorable hydrated calcium silicate. The composite material is characterized in that network interweaving formed by fine crystals (C-S-H gel microcrystals formed after hydration) is added, a certain amount of ettringite is filled in micropores, the pore structure of a hardened body can be improved, and the composite material has good pore grading, less harmful and harmless pores are increased, the total porosity is reduced, the interface structure of the hardened body is improved, so that the hardened body structure can be filled compactly and densified, and the base slurry has higher strength, impermeability and other durability.
2. Soft and no flow, good construction performance
The thixotropic agent enables the slurry to have good deformation capability and anti-flowing capability under the action of force, and the plastic expanding agent is added into the cement to entrain air and simultaneously play a role in softening the slurry, and has the functions of thickening, tackifying and retaining water together with the rubber powder and the cellulose ether. Meanwhile, thixotropic agent, plastic expanding agent and rubber powder are added to play a role in performance complementation, so that the base slurry has relatively perfect construction performance after being mixed with water. The method has the advantages of soft and non-flowing mixing materials initially, capability of well controlling the pouring thickness, good plasticity, no adhesion to the wall of the hanging bucket, water retention, difficulty in forming a hard shell on the poured surface, and good extrudability. The addition of the shrinkage-reducing polycarboxylic acid high-performance water reducing agent can reduce the surface tension of the pore solution of the base slurry, reduce the additional compressive stress caused by the water loss of the pore solution and effectively reduce the shrinkage of the base slurry.
Compared with the prior art, the invention has the following advantages: the base slurry has the characteristics of high strength and no shrinkage, has excellent workability, has good plasticity to meet the requirement of fluidity while ensuring cohesiveness and water retention, and realizes the overall optimization of three aspects of fluidity, water retention and cohesiveness; the ground glass powder prepared by grinding the urban solid waste glass equivalently replaces part of cement, so that the consumption of the cement is reduced, and the addition of the ground glass powder can also improve the fluidity of the base slurry and reduce the consumption of water.
Detailed Description
The following embodiments are provided for more intuitively and clearly describing the technical solution of the present invention so as to facilitate those skilled in the art to better understand the contents of the present invention and to implement the present invention, but the present invention is not limited to these embodiments.
The cement used in examples 1-4 was p.o.52.5 portland cement; the basalt sand is fine sand with fineness modulus of 1.6-2.2 and average grain diameter of 0.30mm-0.60 mm; the size of the ground glass powder particles is not more than 45 mu m; the NC-P1 micro-expanding agent is an ettringite mixed material compounded by superfine sulphoaluminate clinker, flint clay and fluorgypsum, and the mass ratio of the superfine sulphoaluminate clinker to the flint clay to the fluorgypsum is 1; the micro-beads are ultrafine active powder aluminosilicate substances, and are perfect spherical powder materials with the average particle size of 1.5 mu m; the plastic expanding agent is azodicarbonamide (yellow powder); the rubber powder is vinyl acetate and ethylene copolymerized rubber powder; the water reducing agent is a shrinkage-reducing polycarboxylic acid high-performance water reducing agent; the defoaming agent is an organic silicon powder defoaming agent.
The thixotropic agent, magnesium aluminum silicate, organically modified powder of examples 1-4 was prepared by the following method: (1) Taking 50 parts by mass of magnesium silicate aluminum powder into a container, and adding 40 parts by mass of water to prepare a suspension; (2) Adding 10 parts by mass of diethanolamine into the suspension, reacting at 80 ℃ for 8 hours, filtering and washing; (3) And baking the washed product at 105 ℃ for 2 hours, crushing the baked product, and screening the crushed product through a 100-mesh screen to obtain the organic modified powder of the magnesium aluminum silicate. The microstructure is composed of silicate platelets about 1 nm thick and about 100 nm in diameter.
Example 1
Raw materials (parts by weight): 47 parts of cement, 40 parts of basalt sand, 4 parts of ground glass powder, 6 parts of NC-P1 micro-expansion agent, 3 parts of micro-beads, 0.1 part of thixotropic agent, 0.02 part of plastic expansion agent, 0.2 part of rubber powder, 0.08 part of cellulose ether, 0.30 part of water reducing agent and 0.1 part of defoaming agent.
The preparation method comprises the following steps: the powder is taken according to the parts by weight, water is added during use, and the mixture is uniformly mixed, wherein the mass ratio of the powder to the water is 1:0.11.
example 2
Raw materials (parts by weight): 40 parts of cement, 48 parts of basalt sand, 4 parts of ground glass powder, 5 parts of NC-P1 micro-expansion agent, 3 parts of micro-beads, 0.1 part of thixotropic agent, 0.02 part of plastic expansion agent, 0.2 part of rubber powder, 0.08 part of cellulose ether, 0.25 part of water reducing agent and 0.1 part of defoaming agent.
The preparation method comprises the following steps: the powder is taken according to the parts by weight, water is added when the powder is used, and the powder is uniformly mixed, wherein the mass ratio of the powder to the water is 1:0.11.
example 3
Raw materials (parts by weight): 35 parts of cement, 55 parts of basalt sand, 3 parts of ground glass powder, 4 parts of NC-P1 micro-expansion agent, 3 parts of micro-beads, 0.1 part of thixotropic agent, 0.025 part of plastic expansion agent, 0.2 part of rubber powder, 0.08 part of cellulose ether, 0.2 part of water reducing agent and 0.1 part of defoaming agent.
The preparation method comprises the following steps: the powder is taken according to the parts by weight, water is added when the powder is used, and the powder is uniformly mixed, wherein the mass ratio of the powder to the water is 1:0.12.
example 4
Raw materials (parts by weight): 47 parts of cement, 40 parts of basalt sand, 4 parts of ground glass powder, 6 parts of NC-P1 micro-expansion agent, 3 parts of micro-beads, 0.15 part of thixotropic agent, 0.01 part of plastic expansion agent, 0.3 part of rubber powder, 0.1 part of cellulose ether, 0.30 part of water reducing agent and 0.1 part of defoaming agent.
The preparation method comprises the following steps: the powder is taken according to the parts by weight, water is added during use, and the mixture is uniformly mixed, wherein the mass ratio of the powder to the water is 1:0.11.
comparative example 1
Raw materials (parts by weight): 47 parts of cement, 40 parts of basalt sand, 4 parts of ground glass powder, 6 parts of NC-P1 micro-expansion agent, 3 parts of micro-beads, 0.1 part of thixotropic agent, 0.02 part of plastic expansion agent, 0.2 part of rubber powder, 0.08 part of cellulose ether, 0.30 part of water reducing agent and 0.1 part of defoaming agent. The thixotropic agent used is magnesium aluminum silicate powder which is not organically modified. The remaining materials were the same as in example 1.
The preparation method comprises the following steps: the powder is taken according to the parts by weight, water is added during use, and the mixture is uniformly mixed, wherein the mass ratio of the powder to the water is 1:0.11.
table 1 shows the test results of the performances of examples 1-4 of the present invention, and the test is based on the standard Q/JW 201-2020 Shandong Jianke building materials Co., ltd. "high strength non-shrink slurry" (published by the Enterprise Standard information public service platform 2020.10.13) in comparison with comparative example 1 and the more commercial Sika MonoTop-3180CN (foreign brands) slurry of Swiss Sika.
TABLE 1 comparison of the Performance of inventive examples 1 to 4 and comparative examples
As can be seen from the test results in Table 1, the performance indexes of the 100MPa non-shrinkage seat slurry special for the wind power steel-concrete tower, which is prepared in the steps (1) according to the embodiments 1 to 3, meet or are superior to the performance index requirements of the standard QJW 201-2020. (2) The mixture state uses Sika MonoTop-3180CN of Switzerland Seika, the fluidity is too large, the flow is not easy to control, the thickness is not easy to ensure during pouring, and the loss after extrusion is too much, so that the waste is caused; (3) The compressive strength after hardening in examples 1 to 3 was 100MPa or more, whereas the 28d strength of Sika MonoTop-3180CN, switzerland, was only 92.6MPa. (4) Compared with the embodiment 1, the thixotropic agent and the plastic expanding agent which mainly change the initial state are adjusted by the addition amount of the thixotropic agent, the rubber powder and the cellulose ether in the embodiment 4, so that the base slurry has better softness in the initial state, more remarkable anti-sagging property and slightly improved strength for hardening slurry. (5) Comparative example 1 compared with example 1, the thixotropic agent was changed to magnesium aluminum silicate powder, and the thixotropic agent was not organically modified, so that the initial state of the seat paste was deteriorated and the fluidity was slightly increased to 215mm, which was not satisfactory. The casting thickness is not easy to control, the anti-vertical flow characteristic is poor, and the strength of the hardened slurry is slightly reduced.
The above description of the embodiments of the present invention is provided for the purpose of more intuitively and clearly describing the technical solutions of the present invention, so as to facilitate those skilled in the art to better understand the contents of the present invention and to implement the present invention, and the embodiments are exemplary and non-limiting, and it is within the scope of the present invention that those skilled in the art should make improvements and modifications without departing from the scope of the present invention based on the disclosure of the present invention.
Claims (6)
1. A100 MPa non-shrinkage base slurry special for a wind power steel-concrete tower is characterized by comprising the following components in parts by weight: 30-50 parts of cement, 40-60 parts of basalt sand, 3-6 parts of ground glass powder, 4-6 parts of NC-P1 micro-expansion agent, 1-3 parts of microbeads, 0.1-0.15 part of thixotropic agent, 0.01-0.03 part of plastic expansion agent, 0.1-0.3 part of rubber powder, 0.05-0.1 part of cellulose ether, 0.15-0.3 part of water reducing agent and 0.05-0.15 part of defoaming agent;
the cellulose ether is hydroxypropyl methyl cellulose, and the viscosity is 10000mPa.s-16000mPa.s;
the ground glass powder is prepared by grinding and processing waste glass of urban solid wastes, and the particle size is not more than 45 mu m;
the NC-P1 micro-expansion agent is as follows: the ettringite mixed material is compounded by superfine sulphoaluminate cement clinker, flint clay and fluorgypsum, wherein the mass ratio of the superfine sulphoaluminate cement clinker to the flint clay to the fluorgypsum is 1.8-2.2: 1.8-2.2;
the thixotropic agent adopts aluminium-magnesium silicate organic modified powder of aluminium-magnesium silicate modified by diethanolamine, and the preparation method comprises the following steps: (1) adding water into magnesium aluminum silicate powder to prepare a suspension; (2) Adding diethanolamine into the suspension, reacting at 70-90 deg.C for 6-10h, filtering, and washing; (3) Baking and crushing the washed product, and sieving the crushed product with a 100-mesh sieve to obtain the product.
2. The special 100MPa non-shrinkage seat slurry for the wind power steel-concrete tower frame as claimed in claim 1, wherein the cement is P.O.52.5 ordinary portland cement; the basalt sand is fine sand with fineness modulus of 1.6-2.2 and average grain diameter of 0.30-0.60 mm.
3. The special 100MPa non-shrink seat slurry for the wind power steel-concrete tower according to claim 1, wherein the micro-beads are aluminosilicate spherical powder with the average particle size of 1.5 μm.
4. The special 100MPa non-shrink seat slurry for the wind power steel-concrete tower as claimed in claim 1, wherein the plastic expanding agent is azodicarbonamide; the rubber powder is vinyl acetate and ethylene copolymerized rubber powder, or ethylene, vinyl chloride and vinyl laurate ternary copolymerized rubber powder, or vinyl acetate, ethylene and fatty acid vinyl ester ternary copolymerized rubber powder.
5. The special 100MPa non-shrink seat slurry for the wind power steel-concrete tower as claimed in claim 1, wherein the water reducing agent is a shrinkage-reduction type polycarboxylate water reducing agent; the defoaming agent is an organic silicon powder defoaming agent.
6. The preparation method of the 100MPa non-shrink-seat slurry special for the wind power steel-concrete tower, as claimed in any one of claims 1 to 5, is characterized in that the components are taken according to parts by weight, water is added during use, the mixture is uniformly mixed, and the mass ratio of powder to water is 1:0.10 to 0.12.
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