CN115947578A - High-flow-state early-strength semi-flexible pavement grouting material and preparation method thereof - Google Patents
High-flow-state early-strength semi-flexible pavement grouting material and preparation method thereof Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 119
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 238000003756 stirring Methods 0.000 claims abstract description 82
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 75
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 55
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 54
- 239000004568 cement Substances 0.000 claims abstract description 35
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 35
- 239000011325 microbead Substances 0.000 claims abstract description 27
- 239000012190 activator Substances 0.000 claims abstract description 26
- 239000003513 alkali Substances 0.000 claims abstract description 26
- 239000010881 fly ash Substances 0.000 claims abstract description 26
- 239000002893 slag Substances 0.000 claims abstract description 21
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 20
- 239000010440 gypsum Substances 0.000 claims abstract description 17
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 17
- 230000010355 oscillation Effects 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims description 19
- 239000000843 powder Substances 0.000 claims description 16
- 235000019353 potassium silicate Nutrition 0.000 claims description 14
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 10
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 6
- 239000002585 base Substances 0.000 claims description 6
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 claims description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 150000001408 amides Chemical class 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical class [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- 235000012255 calcium oxide Nutrition 0.000 claims description 3
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 3
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims description 3
- 229910052808 lithium carbonate Inorganic materials 0.000 claims description 3
- 235000012245 magnesium oxide Nutrition 0.000 claims description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical class [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 3
- 150000003014 phosphoric acid esters Chemical class 0.000 claims description 3
- 229920000570 polyether Polymers 0.000 claims description 3
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 239000010426 asphalt Substances 0.000 abstract description 4
- 239000002131 composite material Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 239000011083 cement mortar Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 3
- 239000013530 defoamer Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910003471 inorganic composite material Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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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 high-flow early-strength semi-flexible pavement grouting material and a preparation method thereof, wherein the grouting material comprises the following components in parts by weight: 25 to 55 portions of cement, 35 to 50 portions of slag, 15 to 30 portions of modified fly ash micro-beads, 10 to 30 portions of fine aggregate, 1 to 2 portions of desulfurized gypsum, 30 to 70 portions of alkali activator, 10 to 20 portions of sodium hydroxide, 0.1 to 0.5 portion of early strength agent, 1 to 5 portions of expanding agent, 1 to 3 portions of water reducing agent, 0.5 to 1 portion of defoaming agent and 50 to 110 portions of water. The semi-flexible pavement grouting material provided by the invention is a composite grouting material which has the advantages of early strength, quick hardening, high fluidity, micro expansion and strong binding power with an asphalt mixture, on one hand, the early strength of the grouting material is improved through an alkali activator, and on the other hand, the fluidity of the grouting material is optimized through the ball effect of fly ash microbeads. The rotary oscillation stirring device for the grouting material on the semi-flexible pavement can improve the uniformity of the prepared grouting material, so that the performance of the grouting material is more excellent. The semi-flexible pavement grouting material prepared by the invention is convenient to construct, high in cost performance, and wide in popularization prospect and application value.
Description
Technical Field
The invention belongs to the field of inorganic composite materials, and particularly relates to a high-flow-state early-strength semi-flexible pavement grouting material and a preparation method thereof.
Background
The semi-flexible pavement is a novel composite pavement formed by pouring cement slurry on the basis of an asphalt pavement structure, and has the advantages of good asphalt pavement flexibility, strong crack resistance, no joint, high rigidity of a cement concrete pavement, strong bearing capacity and good anti-rutting performance. The cement-based grouting material is an important component for determining the performance of the semi-flexible pavement, and the working performance and the mechanical property of the grouting material have important significance on the bearing capacity and the volume stability of the pavement. In recent years, as the requirements of people on the performance of building materials are higher and higher, the requirements on grouting materials are also higher and higher.
The semi-flexible pavement cement-based grouting material in the prior searchable data still has certain problems:
(1) Chinese invention patent publication number: CN113277809A discloses a cement-based grouting material for an early strength type semi-flexible pavement, which is composed of rapid hardening sulphoaluminate cement, silica fume, fine aggregate, an early strength agent, a water reducing agent and the like, has the characteristics of high early strength and uniform and stable slurry, but has an unsatisfactory actual flowing effect and is not beneficial to actual construction.
(2) Chinese invention patent publication number: CN105016678A discloses a cement-based filling material for a semi-flexible composite pavement, which comprises Portland cement, an expanding agent, quartz sand, a water reducing agent, a stabilizing agent and the like, wherein the material has relatively high fluidity but relatively low early strength, cannot meet the requirement of rapid traffic opening in the practical application of road engineering, and influences the application of the semi-flexible pavement material in the field of road engineering.
A certain contradiction exists between the fluidity and the early strength of the cement-based grouting material, the early strength which has good fluidity does not always meet the requirement, and the high fluidity of the early strength can be influenced. For the cement-based grouting material for the semi-flexible pavement, the high early strength is generally required in order to meet the purpose of quickly opening traffic, but the fluidity of the grouting material is reduced, so that the grouting material is difficult to pour in the construction process, and the construction difficulty is increased. At present, the commercial grouting material is difficult to consider both the fluidity and the early strength, and the stirring uniformity of the grouting material needs to be improved. In view of the above, there is a need to develop a novel semi-flexible pavement grouting material and a preparation method thereof.
Disclosure of Invention
The invention aims to provide a high-flow-state early-strength semi-flexible pavement grouting material and a preparation method thereof. The method has the advantages of simple process, convenience in operation, greenness and no pollution, and can improve the uniformity of the prepared grouting material, so that the performance of the grouting material is more excellent.
The technical problem to be solved by the invention is realized by adopting the following technical scheme.
The invention provides a high-flow-state early-strength semi-flexible pavement grouting material which is prepared from the following materials in parts by weight: 25 to 55 portions of cement, 35 to 50 portions of slag, 15 to 30 portions of modified fly ash micro-beads, 10 to 30 portions of fine aggregate, 1 to 2 portions of desulfurized gypsum, 30 to 70 portions of alkali activator, 10 to 20 portions of sodium hydroxide, 0.1 to 0.5 portion of early strength agent, 1 to 5 portions of expanding agent, 1 to 3 portions of water reducing agent, 0.5 to 1 portion of defoaming agent and 50 to 110 portions of water.
Further, the cement has a strength grade of not less than 42.5 and a specific surface area of more than 500m 2 Per kg of sulphoaluminate cement.
Further, the slag has an average particle diameter of 35 μm and a specific surface area of 200 to 500m 2 /kg。
Furthermore, the content of the hollow micro-beads of the modified fly ash micro-beads is 50% -80%, the fineness of the hollow micro-beads is 0.3-200 mu m, wherein the micro-beads smaller than 5 mu m account for more than 20% of the total amount of the fly ash.
Furthermore, the particle size of the fine aggregate is 150-300 meshes, and the content of silicon dioxide is not less than 95%.
Furthermore, the purity of the desulfurized gypsum is 90-95%, the water content is 10-15%, and the particle size is 30-50 mm.
Furthermore, the alkali activator is prepared by mixing water glass with the modulus of 2.8-3.1, sodium hydroxide and water in proportion.
Further, the early strength agent comprises one or more of lithium chloride and lithium carbonate.
Further, the expanding agent comprises one or more of calcium sulphoaluminates, calcium oxides and magnesium oxides.
Further, the water reducing agent comprises at least one of a naphthalene-based high-efficiency water reducing agent, an amino high-efficiency water reducing agent and a polycarboxylic acid high-performance water reducing agent.
Further, the defoaming agent comprises one or more of amides, organic silicon, polyethers and phosphate esters.
The invention provides a preparation method of a high-flow-state early-strength semi-flexible pavement grouting material, which comprises the following steps:
1) Preparing the components in parts by weight for later use;
2) Dispersing an early strength agent, a water reducing agent, a defoaming agent, an expanding agent and the like into water to form a water agent A;
3) Adding cement, slag, modified fly ash microbeads, fine aggregate and desulfurized gypsum into a mixing pot by adopting a rotary oscillation mixer, closing a feeding barrel cover, starting a rotary device to rotate at 30rpm, and stirring the mixer at a low speed of 120rpm for 1 minute to realize pre-stirring to prepare powder B;
4) Mixing and stirring water glass, sodium hydroxide and water in a reaction vessel according to a certain proportion to prepare an alkali activator C;
5) After the pre-stirring, starting the oscillating stirrer and the rotary device, rotating the rotary device at 30rpm, stirring the stirrer at a high speed of 480rpm, oscillating the stirrer up and down at a speed of 60cm/min, adding the aqueous agent A and the alkali activator C into the stirring pot twice within 1 minute, and continuously stirring for 3 minutes after the feeding is finished to obtain the grouting material. And after the rotary device stops rotating, a material conveying pipe is installed, and a material conveying opening is opened to output grouting material.
Compared with the prior art, the invention has the remarkable advantages that:
1) The high-flow-state early-strength semi-flexible pavement grouting material provided by the invention is a novel environment-friendly energy-saving material, and has no pollution and low emission;
2) The high-flow-state early-strength semi-flexible pavement grouting material provided by the invention has the advantages of early hardness, fast strength, high fluidity, micro expansion, strong binding power and the like;
3) The high-flow-state early-strength semi-flexible pavement grouting material provided by the invention improves the retention rate of slurry, maintains the uniformity of the slurry and does not bleed and segregate;
4) The high-flow-state early-strength semi-flexible pavement grouting material provided by the invention is simple in construction process and wide in application range.
Drawings
FIG. 1 is a schematic view of the high flow state early strength type semi-flexible pavement grouting material stirring device of the present invention.
In the figure: 1. the device comprises a stirring barrel, 2 feeding barrel covers, 3 forward stirring shafts, 4 stirring motors, 5 movable slide rails, 6 supporting rods, 7 controllers, 8 reversely rotating bases, 9 discharging ports and 10 discharging pipes.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
The high-flow early-strength semi-flexible pavement grouting material and the preparation method thereof according to the embodiment of the invention are specifically explained below.
The embodiment of the invention provides a high-flow-state early-strength semi-flexible pavement grouting material which is prepared from the following materials in parts by weight: 25 to 55 portions of cement, 35 to 50 portions of slag, 15 to 30 portions of modified fly ash micro-beads, 10 to 30 portions of fine aggregate, 1 to 2 portions of desulfurized gypsum, 30 to 70 portions of alkali activator, 10 to 20 portions of sodium hydroxide, 0.1 to 0.5 portion of early strength agent, 1 to 5 portions of expanding agent, 1 to 3 portions of water reducing agent, 0.5 to 1 portion of defoaming agent and 50 to 110 portions of water.
Wherein the cement has a strength grade of not less than 42.5 and a specific surface area of more than 500m 2 A sulphate aluminium cement per kg; the average grain diameter of the slag is 35 mu m, and the specific surface area is 200-500 m 2 Per kg; the content of the hollow micro-beads of the modified fly ash micro-beads is 50 to 80 percent, the fineness of the hollow micro-beads is 0.3 to 200 mu m, wherein the micro-beads smaller than 5 mu m account for more than 20 percent of the total amount of the fly ash; the particle size of the fine aggregate is 150-300 meshes, and the content of silicon dioxide is not lower than 95%; the purity of the desulfurized gypsum is 90 to 95 percent, the water content is 10 to 15 percent, and the particle size of the particles is between 30 and 50 mm; the alkali activator is prepared by water glass with the modulus of 2.8-3.1, sodium hydroxide and water according to the proportion; the early strength agent comprises one or more of lithium chloride and lithium carbonate; the expanding agent comprises one or more of calcium sulphoaluminates, calcium oxides and magnesium oxides; the water reducing agent comprises at least one of a naphthalene-based high-efficiency water reducing agent, an amino high-efficiency water reducing agent and a polycarboxylic acid high-performance water reducing agent; the defoaming agent comprises one or more of amides, organic silicon, polyethers and phosphate esters.
The high-flow-state early-strength semi-flexible pavement grouting material provided by the embodiment of the invention takes cement, slag, modified fly ash microbeads, fine aggregate, desulfurized gypsum, an alkali activator, sodium hydroxide, an early strength agent, an expanding agent, a water reducing agent, a defoaming agent and water as main raw materials, and has the characteristics of early strength, quick hardening, high fluidity, micro expansion and strong binding power with an asphalt mixture.
The invention also provides a preparation method of the high-flow-state early-strength semi-flexible pavement grouting material, which comprises the following steps:
1) Preparing the components in parts by weight for later use;
2) Dispersing an early strength agent, a water reducing agent, a defoaming agent, an expanding agent and the like into water to form a water agent A;
3) Adding cement, slag, modified fly ash microbeads, fine aggregate and desulfurized gypsum into a mixing pot by adopting a rotary oscillation mixer, closing a feeding barrel cover, starting a rotary device to rotate at 30rpm, and stirring the mixer at a low speed of 120rpm for 1 minute to realize pre-stirring to prepare powder B;
4) Mixing and stirring water glass, sodium hydroxide and water in a reaction vessel according to a certain proportion to prepare an alkali activator C;
5) After the pre-stirring, starting an oscillating stirrer and a rotary device, rotating the rotary device at 30rpm, stirring the stirrer at a high speed of 480rpm, oscillating the stirrer up and down at a speed of 60cm/min, adding the aqueous agent A and the alkali activator C into a stirring pot twice within 1 minute, and continuously stirring for 3 minutes after finishing feeding to obtain the grouting material. And after the rotary device stops rotating, a material conveying pipe is installed, and a material conveying opening is opened to output grouting material.
The invention provides a high-flow-state early-strength semi-flexible pavement grouting material stirring device
As shown in fig. 1, the device comprises a stirring barrel 1, a feeding barrel cover 2, a forward stirring shaft 3, a stirring motor 4, a movable sliding rail 5, a supporting rod 6, a controller 7, a reverse rotating base 8, a discharge port 9 and a discharge pipe 10; this high flow state early strong type semi-flexible pavement grouting material agitating unit includes forward (mixing) shaft and reverse rotation base, and the forward (mixing) shaft drives agitator motor clockwise rotation after the start, and reverse rotation base drives agitator anticlockwise rotation, and this kind of stirring mode can make grouting material obtain abundant mix, and the stirring homogeneity is showing and is promoting, and the grouting material performance that obtains is more superior.
This high flow state early strong type semi-flexible pavement grouting material agitating unit includes movable slide rail and controller, after the start-up under the effect of controller, agitator motor accessible movable slide rail realizes the vibration stirring from top to bottom, can effectively solve the problem of stirring inhomogeneous and powder sinking the end, makes the grouting material performance that makes more superior.
The features and properties of the present invention are described in further detail below with reference to examples.
Example 1
The embodiment provides a high flow state early strength type semi-flexible pavement grouting material, which is prepared by adopting a rotary oscillation stirring device, and the preparation steps are as follows:
s101, preparing materials: preparing 45 parts of cement, 45 parts of slag, 25 parts of modified fly ash microbeads, 25 parts of fine aggregate, 1.5 parts of desulfurized gypsum, 60 parts of water glass, 15 parts of sodium hydroxide, 0.5 part of early strength agent, 5 parts of UEA expanding agent, 3 parts of water reducing agent, 0.8 part of organosilicon defoamer and 80 parts of water.
S102, preparing an aqueous solution: 0.5 part of early strength agent, 3 parts of water reducing agent, 0.8 part of defoaming agent, 5 parts of UEA expanding agent and the like are dispersed in water to form a water agent A.
S103, preparing powder: and (3) adding 45 parts of cement, 45 parts of slag, 25 parts of modified fly ash microbeads, 25 parts of fine aggregate and 1.5 parts of desulfurized gypsum into a mixing pot by adopting a rotary oscillation mixer, closing a feeding barrel cover, starting a rotary device to rotate at 30rpm, and stirring the mixer at a low speed of 120rpm for 1 minute to realize pre-stirring to prepare powder B.
S104, preparing an alkali activator: and mixing and stirring 60 parts of water glass, 15 parts of sodium hydroxide and 80 parts of water in a reaction container according to a ratio to prepare the alkali activator C.
S105, preparing grouting material: after the pre-stirring, starting the oscillating stirrer and the rotary device, rotating the rotary device at 30rpm, stirring the stirrer at a high speed of 480rpm, oscillating the stirrer up and down at a speed of 60cm/min, adding the aqueous agent A and the alkali activator C into the stirring pot twice within 1 minute, and continuously stirring for 3 minutes after the feeding is finished to obtain the grouting material. And after the rotary device stops rotating, a material conveying pipe is installed, and a material conveying opening is opened to output grouting material.
Example 2
The embodiment provides a high flow state early strength type semi-flexible pavement grouting material, which is prepared by adopting a rotary oscillation stirring device, and the preparation steps are as follows:
s201, preparing materials: preparing 40 parts of cement, 45 parts of slag, 20 parts of modified fly ash microbeads, 20 parts of fine aggregate, 1 part of desulfurized gypsum, 60 parts of water glass, 15 parts of sodium hydroxide, 0.3 part of early strength agent, 3 parts of UEA expanding agent, 2 parts of water reducing agent, 0.8 part of organosilicon defoamer and 80 parts of water.
S202, preparing a water aqua: 0.3 part of early strength agent, 2 parts of water reducing agent, 0.8 part of defoaming agent, 3 parts of UEA expanding agent and the like are dispersed in water to form a water agent A.
S203, preparing powder: adding 40 parts of cement, 45 parts of slag, 20 parts of modified fly ash microbeads, 20 parts of fine aggregate and 1 part of desulfurized gypsum into a mixing pot by adopting a rotary oscillation mixer, closing a feeding barrel cover, starting a rotary device to rotate at 30rpm, and stirring the mixer at a low speed of 120rpm for 1 minute to realize pre-stirring to prepare powder B.
S204, preparing an alkali activator: and mixing and stirring 60 parts of water glass, 15 parts of sodium hydroxide and 80 parts of water in a reaction container according to a ratio to prepare the alkali activator C.
S205, preparing grouting material: after the pre-stirring, starting the oscillating stirrer and the rotary device, rotating the rotary device at 30rpm, stirring the stirrer at a high speed of 480rpm, oscillating the stirrer up and down at a speed of 60cm/min, adding the aqueous agent A and the alkali activator C into the stirring pot twice within 1 minute, and continuously stirring for 3 minutes after the feeding is finished to obtain the grouting material. And after the rotary device stops rotating, a material conveying pipe is installed, and a material conveying opening is opened to output grouting material.
Example 3
The embodiment provides a high flow state early strength type semi-flexible pavement grouting material, which is prepared by adopting a rotary oscillation stirring device, and the preparation steps are as follows:
s301, preparing materials: 30 parts of cement, 35 parts of slag, 15 parts of modified fly ash microbeads, 15 parts of fine aggregate, 1.5 parts of desulfurized gypsum, 60 parts of water glass, 10 parts of sodium hydroxide, 0.2 part of early strength agent, 2 parts of UEA expanding agent, 2 parts of water reducing agent, 0.5 part of organic silicon defoaming agent and 60 parts of water are prepared.
S302, preparing an aqueous solution: 0.2 part of an early strength agent, 2 parts of a water reducing agent, 0.5 part of a defoaming agent, 2 parts of a UEA expanding agent and the like are dispersed in water to form an aqueous agent A.
S303, preparing powder: and (3) adding 30 parts of cement, 35 parts of slag, 15 parts of modified fly ash microbeads, 15 parts of fine aggregate and 1.5 parts of desulfurized gypsum into a mixing pot by adopting a rotary oscillation mixer, closing a feeding barrel cover, starting a rotary device to rotate at 30rpm, and stirring the mixer at a low speed of 120rpm for 1 minute to realize pre-stirring to prepare the powder B.
S304, preparing an alkali activator: and mixing and stirring 60 parts of water glass, 10 parts of sodium hydroxide and 60 parts of water in a reaction container according to a ratio to prepare the alkali activator C.
S305, preparing grouting material: after the pre-stirring, starting the oscillating stirrer and the rotary device, rotating the rotary device at 30rpm, stirring the stirrer at a high speed of 480rpm, oscillating the stirrer up and down at a speed of 60cm/min, adding the aqueous agent A and the alkali activator C into the stirring pot twice within 1 minute, and continuously stirring for 3 minutes after the feeding is finished to obtain the grouting material. And after the rotary device stops rotating, a material conveying pipe is installed, and a material conveying opening is opened to output grouting material.
Comparative example 1
The comparative example provides a grouting material for a common semi-flexible pavement, which is prepared by adopting a common cement mortar mixer, and comprises the following preparation steps:
d101, preparing materials: preparing 40 parts of cement, 40 parts of slag, 15 parts of fly ash, 25 parts of fine aggregate, 3 parts of a water reducing agent, 0.5 part of an organic silicon defoaming agent and 80 parts of water.
D102, preparing an aqueous solution: dispersing 3 parts of water reducing agent, 0.5 part of defoaming agent and the like into water to form a water agent A.
D103, preparing powder: and adding 40 parts of cement, 40 parts of slag, 15 parts of fly ash and 25 parts of fine aggregate into a common cement mortar stirrer, and stirring for 1 minute to realize pre-stirring, thereby preparing powder B.
D104, preparing grouting material: and after the pre-stirring, starting the stirrer, adding the water aqua A into the stirrer within 1 minute, and continuously stirring for 3 minutes after the addition is finished to obtain the grouting material.
Comparative example 2
The comparative example provides a grouting material for a common semi-flexible pavement, the selected raw materials are consistent with those in comparative example 1, and the grouting material is prepared by adopting a rotary oscillation stirring device, and the preparation steps are as follows:
d201, preparing materials: preparing 40 parts of cement, 40 parts of slag, 15 parts of fly ash, 25 parts of fine aggregate, 3 parts of a water reducing agent, 0.5 part of an organic silicon defoaming agent and 80 parts of water.
D202, preparing a water aqua: dispersing 3 parts of water reducing agent, 0.5 part of defoaming agent and the like into water to form a water agent A.
D203, preparing powder: and (3) adding 40 parts of cement, 40 parts of slag, 15 parts of fly ash and 25 parts of fine aggregate into a mixing pot by adopting a rotary oscillation mixer, closing a feeding barrel cover, starting a rotary device to rotate at 30rpm, and stirring the mixer at a low speed of 120rpm for 1 minute to realize pre-stirring to prepare powder B.
D204, preparing grouting material: and after the pre-stirring, starting an oscillating stirrer and a rotary device, wherein the rotary device rotates at 30rpm, the stirrer stirs at a high speed of 480rpm, the stirrer oscillates up and down at a speed of 60cm/min, then the water agent A is added into the stirring pot within 1 minute, and the stirring is continued for 3 minutes after the feeding is finished, thus obtaining the grouting material. And after the rotary device stops rotating, a material conveying pipe is installed, and a material conveying opening is opened to output grouting material.
Comparative example 3
The comparative example provides a high-flow-state early-strength semi-flexible pavement grouting material, the selected raw materials are consistent with those in example 1, and the grouting material is prepared by adopting a common cement mortar stirrer, and the preparation steps are as follows:
d301, preparing materials: preparing 45 parts of cement, 45 parts of slag, 25 parts of modified fly ash microbeads, 25 parts of fine aggregate, 1.5 parts of desulfurized gypsum, 60 parts of water glass, 15 parts of sodium hydroxide, 0.5 part of early strength agent, 5 parts of UEA expanding agent, 3 parts of water reducing agent, 0.8 part of organic silicon defoaming agent and 80 parts of water.
D302, preparing an aqueous solution: 0.5 part of an early strength agent, 3 parts of a water reducing agent, 0.8 part of a defoaming agent, 5 parts of a UEA expanding agent and the like are dispersed in water to form an aqueous agent A.
D303, preparing powder: and adding 45 parts of cement, 45 parts of slag, 25 parts of modified fly ash microbeads, 25 parts of fine aggregate and 1.5 parts of desulfurized gypsum into a common cement mortar stirrer, stirring for 1 minute, and pre-stirring to obtain powder B.
D304, preparing an alkali activator: and mixing and stirring 60 parts of water glass, 15 parts of sodium hydroxide and 80 parts of water in a reaction container according to a ratio to prepare the alkali activator C.
D305, preparing grouting material: after the pre-stirring, starting the stirrer, adding the water agent A and the alkali activator C twice within 1 minute, and continuously stirring for 3 minutes after the addition is finished to obtain the grouting material.
The performance of the high-flow early-strength semi-flexible pavement grouting material provided by the invention is detected, and the detection result is shown in the following table; the detection method refers to GB/T50448-2015 cement-based grouting material application technical specification and JC/T951-2005 cement mortar crack resistance test method.
As can be seen from the table above, the compressive strength and the fluidity of the grouting material prepared by the invention are superior to those of the common grouting material sold in the market, the early strength, the rapid hardening and the high fluidity are considered, and compared with the common stirring mode, the performance of the grouting material is optimized after the rotary oscillation stirring device is adopted. The grouting material prepared by the method has excellent performance, simple construction process, energy conservation and environmental protection, and has wide popularization prospect and application value.
The embodiments described above are some, not all embodiments of the invention. The detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Other embodiments, which can be derived by one of ordinary skill in the art from the embodiments of the present invention without creative efforts, are within the protection scope of the present invention.
Claims (10)
1. The utility model provides a high flow state early strength type semi-flexible pavement grouting material which characterized in that, this grouting material includes according to parts by weight:
2. the high-flow-state early-strength semi-flexible pavement grouting material as claimed in claim 1, wherein the cement is not less than 42.5 strength grade, and the specific surface area is more than 500m 2 Per kg of sulphoaluminate cement.
3. The high flow early strength type semi-flexible pavement grouting material as claimed in claim 1, wherein the content of the hollow micro-beads of the modified fly ash micro-beads is 50% -80%, the fineness thereof is 0.3-200 μm, and the micro-beads smaller than 5 μm account for more than 20% of the total amount of the fly ash.
4. The high flow early strength type semi-flexible pavement grouting material as claimed in claim 1, wherein the alkali activator is prepared by mixing water glass with modulus of 2.8-3.1, sodium hydroxide and water in proportion.
5. The high flow state early strength type semi-flexible pavement grouting material of claim 1, wherein the early strength agent comprises one or more of lithium chloride and lithium carbonate; the expanding agent comprises one or more of calcium sulphoaluminates, calcium oxides and magnesium oxides; the water reducing agent comprises at least one of a naphthalene-based high-efficiency water reducing agent, an amino high-efficiency water reducing agent and a polycarboxylic acid high-performance water reducing agent; the defoaming agent comprises one or more of amides, organic silicon, polyethers and phosphate esters.
6. The high-flow early-strength semi-flexible pavement grouting material as claimed in claim 1, characterized in that the preparation method comprises:
1) Preparing the components in parts by weight for later use;
2) Dispersing an early strength agent, a water reducing agent, a defoaming agent, an expanding agent and the like into water to form an aqueous agent A;
3) Adding cement, slag, modified fly ash microbeads, fine aggregate and desulfurized gypsum into a mixing pot by adopting a rotary oscillation mixer, closing a feeding barrel cover, starting a rotary device to rotate at 30rpm, stirring the mixer at a low speed of 120rpm for 1 minute, and pre-stirring to prepare powder B;
4) Mixing and stirring water glass, sodium hydroxide and water in a reaction vessel according to a certain proportion to prepare an alkali activator C;
5) After the pre-stirring, starting an oscillating stirrer and a rotary device, wherein the rotary device rotates at 30rpm, the stirrer stirs at a high speed of 480rpm, the stirrer oscillates up and down at a speed of 60cm/min, then adding the aqueous agent A and the alkali activator C into a stirring pot twice within 1 minute, and continuing to stir for 3 minutes after finishing feeding to obtain grouting material; and after the rotary device stops rotating, a material conveying pipe is installed, and a material conveying opening is opened to output grouting material.
7. The stirring method of the high flow state early strength type semi-flexible pavement grouting material as claimed in claim 6, characterized in that: the rotary oscillation stirrer is provided with an oscillation control device, the oscillation control device allows the stirrer to oscillate up and down, and limits the oscillation range within 40 cm.
8. The stirring method of the high flow state early strength type semi-flexible pavement grouting material as claimed in claim 6, characterized in that: the mixing pot main body comprises a feeding barrel cover, a stirring barrel and a material conveying opening, wherein the barrel cover comprises two semicircular metal covers.
9. The stirring method of the high flow state early strength type semi-flexible pavement grouting material as claimed in claim 6, characterized in that: the rotary device comprises a reverse rotation base, a speed reducer and a driving motor, and the driving motor drives the base to rotate through the speed reducer.
10. The stirring method of the high-flow-state early-strength semi-flexible pavement grouting material as claimed in claim 6, wherein: the rotary device rotates in the counterclockwise direction, the low gear and the high gear of the blender rotate in the clockwise direction and oscillate up and down.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108839248A (en) * | 2016-07-27 | 2018-11-20 | 刘玉云 | Blender for building |
| CN109747040A (en) * | 2017-11-08 | 2019-05-14 | 上海宝冶集团有限公司 | The stirring means of High Strength Non-shrinking Filling Material for duct grouting |
| CN110981350A (en) * | 2019-12-19 | 2020-04-10 | 苏州国中新材料研究院有限公司 | Geopolymer high-strength grouting material and preparation method thereof |
| CN113135723A (en) * | 2021-05-25 | 2021-07-20 | 中化学交通建设集团有限公司 | Large-flow-state cement-based grouting material for semi-flexible pavement and preparation method thereof |
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- 2022-10-11 CN CN202211237173.6A patent/CN115947578A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108839248A (en) * | 2016-07-27 | 2018-11-20 | 刘玉云 | Blender for building |
| CN109747040A (en) * | 2017-11-08 | 2019-05-14 | 上海宝冶集团有限公司 | The stirring means of High Strength Non-shrinking Filling Material for duct grouting |
| CN110981350A (en) * | 2019-12-19 | 2020-04-10 | 苏州国中新材料研究院有限公司 | Geopolymer high-strength grouting material and preparation method thereof |
| CN113135723A (en) * | 2021-05-25 | 2021-07-20 | 中化学交通建设集团有限公司 | Large-flow-state cement-based grouting material for semi-flexible pavement and preparation method thereof |
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