CN114873962A - Formula of fiber reinforced silicate cement wallboard for recycling wind power blades - Google Patents
Formula of fiber reinforced silicate cement wallboard for recycling wind power blades Download PDFInfo
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- CN114873962A CN114873962A CN202111628465.8A CN202111628465A CN114873962A CN 114873962 A CN114873962 A CN 114873962A CN 202111628465 A CN202111628465 A CN 202111628465A CN 114873962 A CN114873962 A CN 114873962A
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- 239000000835 fiber Substances 0.000 title claims abstract description 115
- 238000004064 recycling Methods 0.000 title description 4
- 239000003469 silicate cement Substances 0.000 title description 4
- 239000004568 cement Substances 0.000 claims abstract description 71
- 239000007788 liquid Substances 0.000 claims abstract description 42
- 238000002156 mixing Methods 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000004576 sand Substances 0.000 claims abstract description 29
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 28
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 26
- 229920005646 polycarboxylate Polymers 0.000 claims abstract description 26
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 21
- 239000011398 Portland cement Substances 0.000 claims abstract description 19
- 239000000839 emulsion Substances 0.000 claims abstract description 16
- 229920000058 polyacrylate Polymers 0.000 claims abstract description 16
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 15
- 239000010703 silicon Substances 0.000 claims abstract description 15
- 239000002245 particle Substances 0.000 claims abstract description 13
- 229920000642 polymer Polymers 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 238000012360 testing method Methods 0.000 claims description 62
- 238000003756 stirring Methods 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 15
- 239000002002 slurry Substances 0.000 claims description 12
- 241000537371 Fraxinus caroliniana Species 0.000 claims description 10
- 235000010891 Ptelea trifoliata Nutrition 0.000 claims description 10
- 239000011521 glass Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 3
- 238000007667 floating Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims 11
- 238000009472 formulation Methods 0.000 claims 4
- 239000013530 defoamer Substances 0.000 claims 1
- 239000000377 silicon dioxide Substances 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract description 43
- 239000000463 material Substances 0.000 abstract description 23
- 238000000034 method Methods 0.000 abstract description 3
- 239000011211 glass fiber reinforced concrete Substances 0.000 abstract description 2
- 238000010998 test method Methods 0.000 description 7
- 239000003365 glass fiber Substances 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a wind power blade recycled fiber reinforced portland cement wallboard formula, and relates to the technical field of glass fiber reinforced concrete; the method aims to solve the problem that fibers obtained after wind power blades are smashed cannot be effectively and pollution-free recovered and utilized; the composition specifically comprises the following components: the mortar comprises ordinary river sand with the particle size of less than 2.16mm, a liquid polycarboxylate water reducer, a pure acrylic polymer emulsion, a liquid defoaming agent and a recycled fiber B with the diameter of 2mm, wherein the mixing ratio of the recycled fiber B is 1-5% of the mass of the cement, the ordinary river sand and the ordinary silicon cement are mixed according to the ratio of 1:1, the mixing ratio of the liquid polycarboxylate water reducer is 2-5%, the poly ash ratio is 5-10%, the defoaming agent is 1-3% of the mass of the polymer, and the water-cement ratio is 0.1-0.4. According to the invention, the fibers obtained after the wind power blades are crushed are mixed into the cement according to a proportion to prepare the cement wallboard, so that the bending strength and the toughness of the wallboard prepared from the cement-based material are effectively improved.
Description
Technical Field
The invention relates to the technical field of glass fiber reinforced concrete, in particular to a formula of a recycled fiber reinforced silicate cement wallboard for a wind power blade.
Background
The wind power generation means that the kinetic energy of wind is converted into electric energy, the wind energy is a clean and pollution-free renewable energy source, after the wind power generator is used for a period of time, the obtained wind power blade needs to be maintained and replaced, the wind power blade is mainly made of thermosetting materials and fiber materials, and the length of the blade is as follows: 40m or more, the maximum width is: 2m or more, and large volume.
When the wind power blade reaches the service life, the wind power blade needs to be smashed, the smashed wind power blade can generate a large amount of glass fibers with different thicknesses, the glass fibers are strong in heat resistance and good in corrosion resistance, the fibers cannot be treated through simple landfill, a large amount of toxic gas can be generated after burning, the fibers cannot be simply treated through burning, and therefore a fiber method which can effectively recycle and utilize the smashed wind power blade and is pollution-free is urgently needed.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a wind power blade recycled fiber reinforced portland cement wallboard formula.
In order to achieve the purpose, the invention adopts the following technical scheme:
the formula of the recycled fiber reinforced silicate cement wallboard for the wind power blade comprises the following components: the mortar comprises ordinary river sand with the particle size of less than 2.16mm, a liquid polycarboxylate water reducer, a pure acrylic polymer emulsion, a liquid defoaming agent and recycled fiber A with the diameter of 1mm, wherein the mixing ratio of the recycled fiber A is 1-5% of the mass of the cement, the ordinary river sand and the ordinary silicon cement are mixed according to the ratio of 1:1, the mixing ratio of the liquid polycarboxylate water reducer is 2-5%, the poly-ash ratio is 5-10%, the defoaming agent is 1-3% of the mass of the polymer, and the water-ash ratio is 0.1-0.4.
Preferably: the cement wallboard is manufactured by using a forming die, the sizes of a forming cavity and a wallboard test piece of the forming die are respectively 250 x 50 x 10mm, the ordinary silicon cement and the ordinary river sand are placed in a drying environment at the temperature of 20 +/-1 ℃ for 24 hours, the weighed pure acrylic polymer emulsion and the liquid defoaming agent are placed in a stirring pot and are uniformly stirred by a stirring rod, the weighed powder is uniformly premixed, the powder is placed in the stirring pot, the stirring is slowly carried out for 2 minutes, the fluidity of the mortar is detected, the mortar in the stirring pot is uniformly stirred and then poured into the forming cavity of the forming die, and after the vibration is carried out for 1 minute, the surface of the die is leveled by using a spatula.
Further: placing the cement wallboard in a forming die for 1 day in an environment with the temperature of 20 +/-1 ℃ and the humidity of more than 90 percent and spraying regularly, then removing the die, and placing a wallboard test piece removed from the die in an environment with the temperature of 20 +/-1 ℃ and the humidity of 60 percent for 6 days to obtain a finished wallboard test piece.
As a preferable aspect of the present invention: the mortar fluidity detection method comprises the following steps:
s1: placing a metal ring with an inner diameter of 57mm and a height of 55mm on the center of a 500mm x 500mm glass plate;
s2: filling the metal ring with the slurry in the stirring pot, and knocking the edge of the metal ring to remove the introduced air;
s3: floating the slurry plane on the upper part of the metal ring, and then vertically lifting the metal ring to allow the slurry to freely diffuse on the organic glass round flat plate;
s4: the diameter of the annulus covered by the slurry was recorded as a numerical value representing the degree of flow.
Further preferred as the invention: the composition consists of the following components: the mortar comprises ordinary river sand with the particle size of less than 2.16mm, a liquid polycarboxylate water reducer, a pure acrylic polymer emulsion, a liquid defoaming agent and a recycled fiber B with the diameter of 2mm, wherein the mixing ratio of the recycled fiber B is 1-5% of the mass of the cement, the ordinary river sand and the ordinary silicon cement are mixed according to the ratio of 1:1, the mixing ratio of the liquid polycarboxylate water reducer is 2-5%, the poly ash ratio is 5-10%, the defoaming agent is 1-3% of the mass of the polymer, and the water-cement ratio is 0.1-0.4.
As a still further scheme of the invention: the composition consists of the following components: the mortar comprises ordinary river sand with the particle size of less than 2.16mm, a liquid polycarboxylate water reducer, a pure acrylic polymer emulsion, a liquid defoaming agent and recycled fibers C with the diameter of 3mm, wherein the mixing ratio of the recycled fibers C is 1-5% of the mass of the cement, the ordinary river sand and the ordinary silicon cement are mixed according to the ratio of 1:1, the mixing ratio of the liquid polycarboxylate water reducer is 2-5%, the poly-ash ratio is 5-10%, the defoaming agent is 1-3% of the mass of the polymer, and the water-ash ratio is 0.1-0.4.
On the basis of the scheme: the composition consists of the following components: the mortar comprises ordinary silicon cement, ordinary river sand with the particle size smaller than 2.16mm, a liquid polycarboxylate water reducer, a pure acrylic polymer emulsion, a liquid defoaming agent and recycled fiber O with the diameter of 0.5mm, wherein the mixing amount of the recycled fiber O is 1-5% of the mass of the cement, the ordinary river sand and the ordinary silicon cement are mixed according to the ratio of 1:1, the mixing amount of the liquid polycarboxylate water reducer is 2-5%, the poly-ash ratio is 5-10%, the defoaming agent is 1-3% of the mass of the polymer, and the water-ash ratio is 0.1-0.4.
The invention has the beneficial effects that:
1. the cement wallboard is prepared by mixing the fibers with different thicknesses obtained by crushing the wind power blade into the cement according to a proper proportion, so that the bending strength and toughness of the cement-based material can be effectively improved by the fibers mixed into the cement while the waste wind power blade is recycled, the fibers have crack resistance, the cracking of the cement-based material can be delayed, the microcrack expansion is prevented, and the protective performance of the cement wall brick is improved.
2. Fibers with different thicknesses can be obtained after the wind power blades are crushed, and after workers classify the fibers according to the limited thicknesses, the optimal doping amount of each thickness limit is obtained according to a bending resistance test: the optimal doping amount of the recycled fiber O (0.5mm), the recycled fiber A (1mm), the recycled fiber B (2mm) and the recycled fiber C (3mm) is respectively 4%, 8% and 4%, and the working personnel can dope the fibers with different thicknesses into cement according to the corresponding doping amount ratio according to the data, so that the manufactured cement wallboard can be well reinforced, and the recycling efficiency of the fibers obtained after the wind power blades are crushed is improved.
3. After a proper amount of fibers are doped into the cement base material, the fibers obtained after the wind power blades are crushed are mostly glass fibers, so that the glass fiber reinforced cement wallboard has good corrosion resistance, and the glass fiber reinforced cement wallboard can improve the overall corrosion resistance effect of the wallboard when being doped into the cement base material for manufacturing the wallboard, thereby effectively prolonging the overall service life of the wallboard.
Drawings
FIG. 1 is a graph plotting bending strength according to data calculated by a constant fluidity test method in example 1 of the present invention.
FIG. 2 is a graph plotting the bending strength according to the data calculated by the constant fluidity test method in example 2 of the present invention.
FIG. 3 is a graph plotting the bending strength according to the data calculated by the constant fluidity test method in example 3 of the present invention.
FIG. 4 is a graph plotting the bending strength according to the data calculated by the constant fluidity test method in example 4 of the present invention.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
Example 1:
the wind power blade recycling fiber reinforced portland cement wallboard formula comprises a stirring pot, a forming die group and a wallboard test piece group, wherein the wallboard test piece consists of the following components: the mortar comprises ordinary portland cement, ordinary river sand with the particle size smaller than 2.16mm, a liquid polycarboxylate water reducer, a pure acrylic polymer emulsion, a liquid defoaming agent and recycled fiber A with the diameter of 1mm, wherein the mixing ratio of the recycled fiber A is 4% of the mass of the cement, the ordinary river sand and the ordinary portland cement are mixed according to the ratio of 1:1, the mixing ratio of the liquid polycarboxylate water reducer is 2.5%, the poly-ash ratio is 6%, the defoaming agent is 1% of the mass of the polymer, and the water-ash ratio is 0.248, wherein the ordinary portland cement used in the embodiment is ordinary portland cement with the strength grade of 42.5;
the sizes of the forming cavity of the forming die and the wallboard test piece are 250 x 50 x 10mm respectively, the ordinary silicon cement and the ordinary river sand are placed in a drying environment at the temperature of 20 +/-1 ℃ for 24 hours, the weighed pure acrylic polymer emulsion and the liquid defoaming agent are placed in a stirring pot and are uniformly stirred by a stirring rod, the weighed powder is uniformly premixed, the powder is placed in the stirring pot, the stirring is carried out slowly for 2 minutes, the mortar fluidity is detected, then the mixture is poured into the forming die, the wallboard test piece is placed in an environment with the temperature of 20 +/-1 ℃ and the humidity of more than 90% and is sprayed regularly for 1 day, then the die is removed, and the wallboard test piece removed from the die is placed in an environment with the temperature of 20 +/-1 ℃ and the humidity of 60% for 6 days to obtain the finished wallboard test piece.
In order to obtain the optimal doping proportion of the recycled fibers A, workers divide the doping range (mass fraction of cement) of the recycled fibers A into eight samples of 0, 0.02, 0.04, 0.06, 0.08, 0.1, 0.12 and 0.14, then eight wallboard test pieces are manufactured according to the doping range of the recycled fibers A, the code numbers of the eight wallboard test pieces are respectively A0, A1, A2, A3, A4, A5, A6 and A7, then bending resistance tests are carried out on the eight wallboard test pieces, (refer to GB/T15231-2008 glass fiber reinforced cement performance test method), and the material proportion of the eight wallboard test pieces during testing is shown as follows:
during testing, firstly, measuring the thickness and the width of each test piece by using a vernier caliper, inputting a corresponding software program, then, carrying out bending resistance testing in sequence to obtain a test force-axial deformation curve of the test piece, wherein the load corresponding to the highest point of the curve is the maximum force, namely the breaking load (Pm); the following formula is utilized:
σMOR＝PmL/(bh2)
the bending strength of each test piece is calculated, the average value is taken, the error is not more than 10%, and a bending strength curve is drawn according to data obtained by calculation of a fixed fluidity detection method (150 +/-10 mm), and the curve is shown in figure 1.
As can be seen from the bending strength of fig. 1: along with the increase of the doping amount of the recycled fiber A (1mm), the bending strength of the test piece generally shows the trend of increasing, then decreasing and then gradually changing, and when the doping amount of the recycled fiber A is 4%, the bending strength of the test piece is 13.7MPa at most and is improved by 21% compared with the bending strength of the test piece without the fiber; when the mixing amount is more than 4 percent, the bending strength of the test piece is reduced and tends to be gentle, the bending strength is maintained at 12MPa and is still improved by 6 percent compared with the bending strength of the test piece without the fiber, and the bending strength result shows that the recycled fiber A can improve the toughness and the bending resistance of the cement-based material, and the mixing amount is 4 percent to be the best.
The mortar fluidity detection method comprises the following steps:
s1: placing a metal ring with an inner diameter of 57mm and a height of 55mm on the center of a 500mm x 500mm glass plate;
s2: filling the metal ring with the slurry in the stirring pot, and knocking the edge of the metal ring to remove the introduced air;
s3: floating the slurry plane on the upper part of the metal ring, and then vertically lifting the metal ring to allow the slurry to freely diffuse on the organic glass round flat plate;
s4: the diameter of the annulus covered by the slurry was recorded as a numerical value representing the degree of flow.
Example 2:
the formula of the wind power blade recycled fiber reinforced portland cement wallboard comprises a forming die group and a wallboard test piece group, wherein the wallboard test piece consists of the following components: the mortar comprises ordinary portland cement, ordinary river sand with the particle size smaller than 2.16mm, a liquid polycarboxylate water reducer, a pure acrylic polymer emulsion, a liquid defoaming agent and recycled fiber B with the diameter of 2mm, wherein the mixing ratio of the recycled fiber B is 8% of the mass of the cement, the ordinary river sand and the ordinary portland cement are mixed according to the ratio of 1:1, the mixing ratio of the liquid polycarboxylate water reducer is 2.5%, the poly-ash ratio is 6%, the defoaming agent is 1% of the mass of the polymer, and the water-ash ratio is 0.248.
The recycled fiber B is divided into eight wallboard test pieces B0, B1, B2, B3, B4, B5, B6 and B7 according to the corresponding yield range, and the material ratio of the eight wallboard test pieces in the test is shown in the following table:
the bending strength curve is plotted from the data calculated from the fixed fluidity test method (150. + -.10 mm), see FIG. 2.
From fig. 2 the bending strength can be seen: when the recycled fiber B (2mm) is mixed with 0-6% of low mixing amount, the bending strength of the test piece is approximately the same; the mixing amount of the recycled fiber B is higher than 6 percent, the bending strength of the test piece is obviously enhanced, and when the mixing amount of the recycled fiber B is 8 to 10 percent, the bending strength of the test piece is 12.4MPa at most, which is improved by 9.7 percent compared with that of the test piece without mixing; the content of the recycled fiber B is more than 12 percent, the bending strength of the test piece is reduced to an unmixed initial strength value, and the bending strength result shows that: the recycled fiber B can improve the toughness and the bending resistance of the cement-based material, and the mixing amount is optimal to be 8 percent.
Example 3
The formula of the wind power blade recycled fiber reinforced portland cement wallboard comprises a forming die group and a wallboard test piece group, wherein the wallboard test piece consists of the following components: the mortar comprises ordinary river sand with the particle size smaller than 2.16mm, a liquid polycarboxylate water reducer, a pure acrylic polymer emulsion, a liquid defoaming agent and recycled fibers C with the diameter of 3mm, wherein the mixing ratio of the recycled fibers C is 4% of the mass of the cement, the ordinary river sand and the ordinary river cement are mixed according to the ratio of 1:1, the mixing ratio of the liquid polycarboxylate water reducer is 2.5%, the poly-ash ratio is 6%, the defoaming agent is 1% of the mass of the polymer, and the water-ash ratio is 0.248.
The recycled fiber C is divided into eight wallboard test pieces C0, C1, C2, C3, C4, C5, C6 and C7 according to the corresponding yield range, and the material ratio of the eight wallboard test pieces in the test is shown in the following table:
the bending strength curve is plotted from the data calculated by the fixed fluidity test method (150. + -.10 mm), see FIG. 3.
From fig. 3 the bending strength can be seen: when the content of the recycled fiber C (3mm) is 0-6%, the bending strength of the test piece is approximately the same; when the mixing amount of the recycled fiber C is more than 8 percent, the bending strength of the test piece is lower than that of the test piece without the recycled fiber C, because the fiber surface absorbs water, in order to maintain the operability (fluidity control) of the cement-based material and increase the water cement ratio, the strength of the cement matrix is reduced, the bending strength of the test piece of the cement-based material reinforced by the recycled fiber C is further reduced, and the optimal mixing amount of the recycled fiber C is 4 percent.
Example 4
The formula of the wind power blade recycled fiber reinforced portland cement wallboard comprises a forming die group and a wallboard test piece group, wherein the wallboard test piece consists of the following components: the mortar comprises ordinary silicon cement, ordinary river sand with the particle size smaller than 2.16mm, a liquid polycarboxylate water reducer, a pure acrylic polymer emulsion, a liquid defoaming agent and recycled fiber O with the diameter of 0.5mm, wherein the mixing amount of the recycled fiber O is 4% of the mass of the cement, the ordinary river sand and the ordinary silicon cement are mixed according to the ratio of 1:1, the mixing amount of the liquid polycarboxylate water reducer is 2.5%, the poly-ash ratio is 6%, the defoaming agent is 1% of the mass of the polymer, and the water-ash ratio is 0.248.
The recycled fiber C is divided into eight wallboard test pieces of O0, O1, O2, O3, O4, O5, O6 and O7 according to the corresponding yield ranges, and the material proportions of the eight wallboard test pieces during testing are shown in the following table:
the bending strength curve is plotted from the data calculated from the fixed fluidity test method (150. + -.10 mm), see FIG. 4.
From fig. 4 the bending strength can be seen: when the mixing amount of the recycled fiber O (0.5mm) is 2-6%, the bending strength of the test piece is slightly higher than that of the test piece without the recycled fiber O; when the content of the recycled fiber O is more than 6 percent, the bending strength of the test piece is obviously reduced and is lower than that of the test piece without the recycled fiber O, because the recycled fiber O has large surface area and water absorption on the surface, the water cement ratio is increased to maintain the operability (fluidity control) of the cement-based material, the strength of the cement matrix is reduced, the bending strength of the O-fiber reinforced cement-based material test piece is further reduced, and the optimal content of the O fiber is 4 percent.
The tests show that the recycled fiber A (1mm) and the recycled fiber B (2mm) can improve the toughness and the bending resistance of the cement-based material, and the recycled fiber A (1mm) has larger lifting amplitude; the recycled fiber O (0.5mm) and the recycled fiber C (3mm) have common effects of improving the bending resistance of the cement-based material, but can improve the toughness of the cement-based material.
The four fibers are responsible for the improvement of the toughness of cement-based materials: the fibers have crack resistance, can delay the cracking of the cement-based material and prevent the micro-cracks from expanding, and four kinds of fibers influence the bending strength of the cement-based material because: the shear strength of the fibers themselves and the bond strength of the fibers to the cementitious substrate.
The shear strength of the recycled fiber O (0.5mm), the recycled fiber A (1mm), the recycled fiber B (2mm) and the recycled fiber C (3mm) is gradually enhanced, and the bonding strength of the four fibers and the cement base material is gradually weakened; therefore, after the test piece is damaged by the bending load, the section diagram of the test piece sequentially shows: the recycled fiber (0.5mm) was mostly cut; cutting off part of recycled fiber A (1mm) and recycled fiber B (2mm), and pulling out part of recycled fiber A and recycled fiber B; the recovered fiber C (3mm) was mostly pulled out. The bending strength, the workability (fluidity) and the economical efficiency are comprehensively considered: the optimum mixing amounts of the recycled fiber O (0.5mm), the recycled fiber A (1mm), the recycled fiber B (2mm) and the recycled fiber C (3mm) are respectively 4%, 8% and 4%.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The formula of the recycled fiber reinforced portland cement wallboard for the wind power blade is characterized by comprising the following components: the mortar comprises ordinary river sand with the particle size of less than 2.16mm, a liquid polycarboxylate water reducer, a pure acrylic polymer emulsion, a liquid defoaming agent and recycled fiber A with the diameter of 1mm, wherein the mixing ratio of the recycled fiber A is 1-5% of the mass of the cement, the ordinary river sand and the ordinary silicon cement are mixed according to the ratio of 1:1, the mixing ratio of the liquid polycarboxylate water reducer is 2-5%, the poly-ash ratio is 5-10%, the defoaming agent is 1-3% of the mass of the polymer, and the water-ash ratio is 0.1-0.4.
2. The wind power blade recycled fiber reinforced portland cement wallboard formula of claim 1, wherein the cement wallboard is manufactured by using a forming die, the size of a forming cavity and a wallboard test piece of the forming die is 250 x 50 x 10mm respectively, ordinary silica cement and ordinary river sand are placed in a drying environment with the temperature of 20 +/-1 ℃ for 24 hours, weighed pure acrylic polymer emulsion and liquid defoamer are placed in a stirring pot and are uniformly stirred by a stirring rod, weighed powder is uniformly premixed and placed in the stirring pot, the stirring is carried out for 2 minutes slowly, the fluidity of mortar is detected, the mortar in the stirring pot is uniformly stirred and then poured into the forming cavity of the forming die, and after the stirring is carried out for 1 minute, the surface of the die is leveled by using a spatula.
3. The wind power blade recycled fiber reinforced portland cement wallboard formula of claim 1, wherein the cement wallboard is placed in a forming die for 1 day in an environment with the temperature of 20 +/-1 ℃ and the humidity of more than 90% and spraying at regular time, then the die is removed, and a wallboard test piece removed from the die is placed in an environment with the temperature of 20 +/-1 ℃ and the humidity of 60% for 6 days to obtain a finished wallboard test piece.
4. The wind turbine blade recycled fiber reinforced portland cement wallboard formulation of claim 2, wherein the detecting the mortar fluidity comprises the steps of:
s1: placing a metal ring with an inner diameter of 57mm and a height of 55mm on the center of a 500mm x 500mm glass plate;
s2: filling the metal ring with the slurry in the stirring pot, and knocking the edge of the metal ring to remove the introduced air;
s3: floating the slurry plane on the upper part of the metal ring, and then vertically lifting the metal ring to allow the slurry to freely diffuse on the organic glass round flat plate;
s4: the diameter of the annulus covered by the slurry was recorded as a numerical value representing the degree of flow.
5. The wind turbine blade recycled fiber reinforced portland cement wallboard formulation of claim 1, comprising the following components: the mortar comprises ordinary river sand with the particle size of less than 2.16mm, a liquid polycarboxylate water reducer, a pure acrylic polymer emulsion, a liquid defoaming agent and a recycled fiber B with the diameter of 2mm, wherein the mixing ratio of the recycled fiber B is 1-5% of the mass of the cement, the ordinary river sand and the ordinary silicon cement are mixed according to the ratio of 1:1, the mixing ratio of the liquid polycarboxylate water reducer is 2-5%, the poly ash ratio is 5-10%, the defoaming agent is 1-3% of the mass of the polymer, and the water-cement ratio is 0.1-0.4.
6. The wind turbine blade recycled fiber reinforced portland cement wallboard formulation of claim 5, comprising the following components: the mortar comprises ordinary river sand with the particle size of less than 2.16mm, a liquid polycarboxylate water reducer, a pure acrylic polymer emulsion, a liquid defoaming agent and recycled fibers C with the diameter of 3mm, wherein the mixing ratio of the recycled fibers C is 1-5% of the mass of the cement, the ordinary river sand and the ordinary silicon cement are mixed according to the ratio of 1:1, the mixing ratio of the liquid polycarboxylate water reducer is 2-5%, the poly-ash ratio is 5-10%, the defoaming agent is 1-3% of the mass of the polymer, and the water-ash ratio is 0.1-0.4.
7. The wind turbine blade recycled fiber reinforced portland cement wallboard formulation of claim 6, comprising the following components: the mortar comprises ordinary silicon cement, ordinary river sand with the particle size smaller than 2.16mm, a liquid polycarboxylate water reducer, a pure acrylic polymer emulsion, a liquid defoaming agent and recycled fiber O with the diameter of 0.5mm, wherein the mixing amount of the recycled fiber O is 1-5% of the mass of the cement, the ordinary river sand and the ordinary silicon cement are mixed according to the ratio of 1:1, the mixing amount of the liquid polycarboxylate water reducer is 2-5%, the poly-ash ratio is 5-10%, the defoaming agent is 1-3% of the mass of the polymer, and the water-ash ratio is 0.1-0.4.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106478007A (en) * | 2016-09-18 | 2017-03-08 | 同济大学 | The modified cement-based composite of superhigh tenacity fiber-reinforced polymer and preparation method |
| CN108640603A (en) * | 2018-05-29 | 2018-10-12 | 南京国电南自电网自动化有限公司 | A kind of Portland cement base glass fiber reinforced cement material and preparation method thereof |
| CN110183192A (en) * | 2019-07-09 | 2019-08-30 | 吉林重通成飞新材料股份公司 | Cement mortar and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106478007A (en) * | 2016-09-18 | 2017-03-08 | 同济大学 | The modified cement-based composite of superhigh tenacity fiber-reinforced polymer and preparation method |
| CN108640603A (en) * | 2018-05-29 | 2018-10-12 | 南京国电南自电网自动化有限公司 | A kind of Portland cement base glass fiber reinforced cement material and preparation method thereof |
| CN110183192A (en) * | 2019-07-09 | 2019-08-30 | 吉林重通成飞新材料股份公司 | Cement mortar and preparation method thereof |
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