CN111943614B - Grouting material for semi-flexible pavement and preparation method and application thereof - Google Patents
Grouting material for semi-flexible pavement and preparation method and application thereof Download PDFInfo
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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
- C04B28/06—Aluminous cements
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
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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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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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
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
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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
- C04B2111/72—Repairing or restoring existing buildings or building 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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Abstract
The invention discloses a grouting material for a semi-flexible pavement and a preparation method and application thereof. The grouting material for the flexible pavement is prepared from the following raw materials: 50 to 75 portions of sulphoaluminate cement, 30 to 50 portions of micro-beads, 0.2 to 0.8 portion of water reducing agent, 0.05 to 0.5 portion of defoaming agent, 2 to 8 portions of color paste and 0.25 to 0.7 portion of water. The grouting material for the semi-flexible pavement has low cost and high homogeneity. The invention also discloses application of the color paste in improving the homogeneity and/or early strength of the grouting material for the semi-flexible pavement.
Description
Technical Field
The invention relates to a grouting material for a semi-flexible pavement and a preparation method thereof, and also relates to application of a color paste in improving the homogeneity and/or early strength of the grouting material for the semi-flexible pavement.
Background
The semi-flexible pavement is a pavement structure type with a cement concrete pavement and an asphalt concrete pavement, has two advantages of a flexible pavement and a rigid pavement, can improve the travelling comfort of a vehicle, improve the track deformation resistance of the vehicle, and effectively reduce the early damage of a heavy-load road, thereby prolonging the service life of the pavement and being the most effective pavement structure for solving the problem of the heavy-load traffic road diseases at present. However, two technical barriers exist in the existing semi-flexible pavement, one is that the traditional grouting material generally belongs to a common type, the later maintenance time is long, the construction period is prolonged, the pressure on road traffic is not small, and the semi-flexible pavement cannot be widely applied to maintenance of municipal roads or pavements; on the other hand, the traditional grouting material is generally based on cement ground color, and the appearance fall is large after the semi-flexible pavement is poured, so that the appearance is attractive.
CN104926242A discloses a concrete crack repairing grouting material. The concrete crack repair grouting material comprises the following components in parts by weight: 550-950 parts of cement; 5-30 parts of glass beads; 20-50 parts of calcite; 50-200 parts of an expansion component; 1-20 parts of a water reducing agent; 0.5-2 parts of a defoaming agent; 0.5-2 parts of a stabilizer; 0.5 to 10 portions of retarding component; 0.1-2 parts of coagulation accelerating component. The concrete crack repairing grouting material has various components, high manufacturing cost and improved homogeneity.
CN104402345B discloses a high flow state micro-swelling high strength grouting material, which comprises, by mass, 23% -34% of cement, 3% -5% of microbeads, 5% -7.5% of phosphorous slag composite powder, 2.5% -3.5% of silica fume, 2.5% -3.5% of quartz powder, 46% -55% of fine aggregates, 0.7% -1% of water reducing agent, 0.01% -0.03% of defoaming agent, 2.5% -3.5% of expanding agent and 0.5% -1% of early strength agent. The grouting material has multiple components, high manufacturing cost and high homogeneity.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a grouting material for a semi-flexible pavement, which has low cost and high homogeneity. Further, the grouting material for the semi-flexible pavement has high early strength.
The invention also aims to provide a preparation method of the grouting material for the semi-flexible pavement, which reduces the mixing time of the grouting material for the semi-flexible pavement and improves the uniformity of the grouting material for the semi-flexible pavement.
Still another object of the present invention is to provide the use of a colour paste.
The technical problem is achieved through the following technical scheme.
On one hand, the invention provides a grouting material for a semi-flexible pavement, which is prepared from the following raw materials:
wherein the color paste is selected from a dinner water-based paint color paste with a product code of 8880718 produced by Beijing Maier chemical technology Limited company or a 'thousand-color-source' brand cyan black color paste produced by Chengduli Ruida new material company.
According to the grouting material for the semi-flexible pavement, the dosage of the sulphoaluminate cement is preferably 50-70 parts by weight, the dosage of the microbeads is 30-45 parts by weight, the dosage of the water reducing agent is 0.2-0.5 part by weight, the dosage of the defoaming agent is 0.1-0.4 part by weight, the dosage of the color paste is 2-5 parts by weight, and the dosage of the water is 0.35-0.5 part by weight.
According to the grouting material for the semi-flexible pavement, preferably, the sulphoaluminate cement is low-alkalinity sulphoaluminate cement of Taizhi brand L.SAC 42.5 produced by Wang building cement industry Co., ltd, zheng Zhou city, the micro-bead is a micro-bead of platinum run type 68153 produced by platinum run casting materials Co., ltd, the water reducing agent is a water reducing agent of SD-600P-R type polycarboxylic acid type produced by Shanghai Sanri high polymer materials Co., ltd, the antifoaming agent is a defoaming agent of VIVID-200 (DFP) type produced by Shanghai Sanri high polymer materials Co., ltd, and the color paste is a Dinaler water-based paint color paste with a product code of 8880718 produced by Beijing Maier chemical engineering Co., ltd.
According to the grouting material for the semi-flexible pavement, the homogeneity degree of the grouting material for the semi-flexible pavement is preferably more than or equal to 30%, the compressive strength of the grouting material for the semi-flexible pavement in 3h is more than or equal to 12MPa, the compressive strength of the grouting material for the semi-flexible pavement in 7d is more than or equal to 34MPa, the flexural strength of the grouting material for the semi-flexible pavement in 3h is more than or equal to 2.5MPa, and the flexural strength of the grouting material for the semi-flexible pavement in 7d is more than or equal to 4.5MPa.
On the other hand, the invention provides a preparation method of the grouting material for the semi-flexible pavement, which comprises the following steps:
(1) Mixing sulphoaluminate cement, microbeads, a water reducing agent and a defoaming agent to form a first mixture;
(2) Mixing the first mixture with 0.5-0.8 times of color paste to form a second mixture; then mixing the second mixture with the rest color paste to form a third mixture; and mixing the third mixture with water to obtain the grouting material for the semi-flexible pavement.
According to the production method of the present invention, preferably, both of the step (1) and the step (2) are carried out in a planetary mixer; the mixing time in the step (1) is 20-30 s; in the step (2), the mixing time of the first mixture and the color paste is 20-40 s, the mixing time of the second mixture and the color paste is 30-40 s, and the mixing time of the third mixture and the water is 50-60 s.
In still another aspect, the present invention provides a use of a color paste for improving the homogeneity and/or early strength of a grouting material for a semi-flexible pavement, wherein the color paste is selected from diner water-based paint color paste having a product code of 8880718 produced by beijing mall chemical technology ltd or "thousand color sources" brand black color paste produced by florida new materials company.
The use according to the invention preferably comprises the following steps:
(1) Mixing sulphoaluminate cement, microbeads, a water reducing agent and a defoaming agent to form a first mixture;
(2) Mixing the first mixture with 0.5-0.8 times of color paste to form a second mixture; then mixing the second mixture with the rest color paste to form a third mixture; mixing the third mixture with water to obtain grouting material for the semi-flexible pavement;
wherein, the dosage of the sulphoaluminate cement is 50 to 75 weight portions, the dosage of the micro-bead is 30 to 50 weight portions, the dosage of the water reducing agent is 0.2 to 0.8 weight portion, the dosage of the antifoaming agent is 0.05 to 0.5 weight portion, the dosage of the color paste is 2 to 8 weight portions, and the dosage of the water is 0.25 to 0.7 weight portion.
According to the use of the present invention, preferably, the sulphoaluminate cement is a low-alkalinity sulphoaluminate cement; siO in the micro-bead 2 More than or equal to 50wt% of Al 2 O 3 The content is more than or equal to 20wt%, the ignition loss of the micro-beads is less than 0.3wt%, D 10 ≤0.5μm，D 50 ≤3μm，D 95 Less than or equal to 10 mu m; the water reducing agent is a polycarboxylic acid type water reducing agent; the defoaming agent is a polyether defoaming agent.
The color paste disclosed by the invention is matched with aluminate cement, the micro-beads, the water reducing agent and the defoaming agent, so that a higher homogeneity degree can be achieved on the premise of not adding additives such as a stabilizing agent, the components are simple, and the cost is saved. The appearance fall between the black color paste and the semi-flexible pavement is small, and the repaired pavement is more attractive. Furthermore, the color paste of the invention can be used together with aluminate cement, micro-beads, water reducing agent and defoaming agent to effectively improve the early strength, especially the compressive strength and the flexural strength of the grouting material for semi-flexible pavement.
Detailed Description
The present invention will be further described with reference to the following specific examples, but the scope of the present invention is not limited thereto.
The "micro bead" also called "fine sinking bead" refers to a kind of global, continuous particle size distribution, superfine, solid, superfine fly ash aluminosilicate fine micro bead (sinking bead).
D 10 The particle size of the sample is 10% of the cumulative particle size distribution.
D 50 The particle diameter is indicated when the cumulative number of particle size distributions of the samples reached 50%.
D 95 The particle size is indicated when the cumulative number of particle size distributions of the samples reached 95%.
< grouting Material for semi-Flexible road surface >
The grouting material for the semi-flexible pavement is prepared from the following raw materials: sulphoaluminate cement, micro-beads, a water reducing agent, a defoaming agent, color paste and water. The color paste is selected from a diner water-based paint color paste with a product code of 8880718 produced by Beijing Maile chemical technology Limited company or a 'thousand-color-source' brand cyan black color paste produced by Chengdui Riuda new material company, such as a water-based carbon black color paste 6800. The grouting material for the semi-flexible pavement can be prepared from sulphoaluminate cement, microbeads, a water reducing agent, a defoaming agent, color paste and water. The grouting material for the semi-flexible pavement can achieve higher homogeneity and early strength without adding a stabilizer, an early strength agent or other reinforcing materials.
In the present invention, the sulfoaluminate cement may be used in an amount of 50 to 75 parts by weight; preferably 50 to 70 parts by weight; more preferably 60 to 70 parts by weight. The sulphoaluminate cement may be a low alkalinity sulphoaluminate cement. Preferably, the sulphoaluminate cement is selected from one of 'Taizhi' brand L.SAC 42.5 low alkalinity sulphoaluminate cement produced by Zhengzhou royal building cement industry Co., ltd or anti-crack Shuangkugao belite low alkalinity sulphoaluminate cement with the model number of 42.5R of BS-CFR produced by Arctic bear building materials Co., ltd. More preferably, the sulphoaluminate cement is a low alkalinity sulphoaluminate cement of "Thai Zhi" brand L.SAC 42.5 produced by Wang building Cement industry Co., ltd. Of Zheng State City. This can improve the homogeneity and early strength of the grouting material for semi-flexible pavement.
In the present invention, the microbeads may be used in an amount of 30 to 50 parts by weight; preferably 30 to 45 parts by weight; more preferably 30 to 40 parts by weight. SiO in microbead 2 The content can be more than or equal to 50wt%, al 2 O 3 The content can be more than or equal to 20wt%, the ignition loss of the micro-beads can be less than 0.3wt%, D 10 Can be less than or equal to 0.5 mu m, D 50 Can be less than or equal to 3 mu m, D 95 Can be less than or equal to 10 mu m. Preferably, the microbead is selected from one of "platinum wet" type microbead 68153 manufactured by Henan platinum wet casting materials, inc. or CZ-2UM type microbead manufactured by Shenzhen Dakt Tech technologies, inc. More preferably, the beads are "platinum" type 68153 beads available from platinum casting materials, inc. of Henan. This can improve the homogeneity and early strength of the grouting material for semi-flexible pavement.
In the invention, the amount of the water reducing agent can be 0.2-0.8 weight part; preferably 0.2 to 0.5 parts by weight; more preferably 0.4 to 0.5 parts by weight. The water reducing agent can be a polycarboxylic acid type water reducing agent; preferably, the water reducing rate of the water reducing agent is more than or equal to 35 percent; more preferably, the water reducing agent is selected from SD-600P-R type powdery polycarboxylic acid water reducing agent special for sulphoaluminate cement produced by Shanghai Sanrui high polymer materials Co., ltd or PC-0305 type polycarboxylic acid water reducing agent special for sulphoaluminate cement produced by Shanghai Yunli Ganci Co., ltd. According to one embodiment of the invention, the water reducing agent is a SD-600P-R type powdery polycarboxylic acid type water reducing agent specially used for sulphoaluminate cement, produced by Sanrui high molecular materials, inc. of Shanghai. This can improve the homogeneity and early strength of the grouting material for semi-flexible pavement.
In the present invention, the defoaming agent may be used in an amount of 0.05 to 0.5 parts by weight; preferably 0.1 to 0.4 parts by weight; more preferably 0.2 to 0.3 parts by weight. The defoamer may be a polyether defoamer. Preferably, the defoaming agent is selected from a VIVID-200 (DFP) type defoaming agent manufactured by Shanghai Sanri Polymer materials Co., ltd or a XP-803 type powder defoaming agent manufactured by Shanghai Yunmgan industry Co., ltd. More preferably, the defoaming agent is a VIVID-200 (DFP) type defoaming agent manufactured by Sanremo high molecular materials, inc. of Shanghai. This can improve the homogeneity and early strength of the grouting material for semi-flexible pavement.
In the invention, the amount of the color paste can be 2-8 parts by weight; preferably 2 to 5 parts by weight; more preferably 3 to 4 parts by weight. The color paste can be selected from dinner water-based paint color paste with the product code of 8880718 produced by Beijing Maier chemical technology Limited company or 'thousand-color-source' brand cyan black color paste produced by Chengduli Ruida new material company. Preferably, the color paste is a diner water-based paint color paste with a product code of 8880718 produced by Beijing Maier chemical technology, inc. This can improve the homogeneity and early strength of the grouting material for semi-flexible pavement.
In the present invention, water may be used in an amount of 0.25 to 0.7 parts by weight; preferably 0.35 to 0.5 parts by weight; more preferably 0.37 to 0.4 parts by weight. Thus, the moderate fluidity can be achieved, and the use requirement of the grouting material for the semi-flexible pavement can be met.
The homogeneity degree of the grouting material for the semi-flexible pavement is more than or equal to 30 percent; preferably, the homogeneity degree is more than or equal to 32%; more preferably, the degree of homogeneity is 33% or more. The compressive strength after curing for 3 hours is more than or equal to 12MPa; preferably, the compressive strength of curing for 3 hours is more than or equal to 13MPa. The compressive strength of the cured product for 7d is more than or equal to 34MPa; preferably, the compressive strength of the cured product 7d is more than or equal to 36MPa. The breaking strength after curing for 3 hours is more than or equal to 2.5MPa; preferably, the breaking strength after curing for 3 hours is more than or equal to 2.8. The breaking strength of the cured product for 7d is more than or equal to 4.5MPa; preferably, the flexural strength of the cured product for 7d is more than or equal to 5MPa.
According to one embodiment of the invention, the grouting material for the semi-flexible pavement is prepared from the following raw materials: 50 to 75 portions of sulphoaluminate cement, 30 to 50 portions of micro-beads, 0.2 to 0.8 portion of water reducing agent, 0.05 to 0.5 portion of defoaming agent, 2 to 8 portions of color paste and 0.25 to 0.7 portion of water.
According to another embodiment of the invention, the grouting material for the semi-flexible pavement is prepared from the following raw materials: 50 to 70 portions of sulphoaluminate cement, 30 to 45 portions of micro-beads, 0.2 to 0.5 portion of water reducing agent, 0.1 to 0.4 portion of defoaming agent, 2 to 5 portions of color paste and 0.35 to 0.5 portion of water.
According to another embodiment of the invention, the grouting material for the semi-flexible pavement is prepared from the following raw materials: 60 to 70 portions of sulphoaluminate cement, 30 to 40 portions of micro-beads, 0.4 to 0.5 portion of water reducing agent, 0.2 to 0.3 portion of defoaming agent, 3 to 4 portions of color paste and 0.37 to 0.4 portion of water.
According to another embodiment of the invention, the grouting material for the semi-flexible pavement is prepared from raw materials selected from one of the following components:
(1) 60 parts of sulphoaluminate cement, 40 parts of microbeads, 0.4 part of water reducing agent, 0.2 part of defoaming agent, 4 parts of color paste and 0.37 part of water;
(2) 65 parts of sulphoaluminate cement, 35 parts of microbeads, 0.5 part of water reducing agent, 0.2 part of defoaming agent, 4 parts of color paste and 0.38 part of water;
(3) 70 parts of sulphoaluminate cement, 30 parts of microbeads, 0.5 part of water reducing agent, 0.2 part of defoaming agent, 3 parts of color paste and 0.4 part of water.
< preparation method of grouting material for semi-flexible pavement >
The preparation method of the grouting material for the semi-flexible pavement comprises the following steps:
(1) Mixing sulphoaluminate cement, microbeads, a water reducing agent and a defoaming agent to form a first mixture;
(2) Mixing the first mixture with 0.5-0.8 times of color paste to form a second mixture; then mixing the second mixture with the rest color paste to form a third mixture; and mixing the third mixture with water to obtain the grouting material for the semi-flexible pavement.
The selection and use of the sulphoaluminate cement, the microbeads, the water reducing agent, the defoamer, the colour paste and the water are as described above.
The preparation method of the invention firstly mixes the powder material in advance, promotes the dispersion of the water reducing agent and the defoaming agent in the powder material in the mixing process, reduces the mixing time of the grouting material and improves the uniformity of the slurry. The color paste is added into the powder in a distributed manner, so that the color paste can be well and uniformly mixed with the powder, and the uniformity of the slurry is further improved.
In the present invention, the step (1) and the step (2) may be carried out in a planetary mixer. Therefore, better mixing effect can be achieved, and the uniformity of slurry is improved.
The mixing time in the step (1) can be 20-30 s; preferably 22 to 30s; more preferably 22 to 28 seconds. The rotation speed of the planetary mixer may be 35 to 55rpm, preferably 35 to 50rpm, more preferably 35 to 45rpm.
Mixing the first mixture with 0.5-0.8 times of color paste to form a second mixture. Preferably, the first mixture is mixed with 0.6 to 0.7 times of the amount of color paste to form a second mixture.
The mixing time of the first mixture and the color paste can be 20-40 s; preferably 25 to 35s; more preferably 28 to 32s. The rotation speed of the planetary mixer may be 45 to 65rpm, preferably 45 to 60rpm, and more preferably 45 to 55rpm.
The mixing time of the second mixture and the color paste can be 30-40 s; preferably 35 to 40s; more preferably 35 to 38 seconds. The rotation speed of the planetary mixer may be 45 to 65rpm, preferably 45 to 60rpm, and more preferably 45 to 55rpm.
The mixing time of the third mixture with water may be 50 to 60s; preferably 50 to 68s; more preferably from 55 to 68 seconds. The rotation speed of the planetary stirrer may be 45 to 65rpm, preferably 50 to 65rpm, more preferably 50 to 60rpm.
< use >
The invention also provides application of the color paste in improving the homogeneity and/or early strength of the grouting material for the semi-flexible pavement, wherein the color paste is selected from a diner water-based paint color paste with a product code of 8880718 produced by Beijing Maier chemical engineering Limited company or a 'thousand-color-source' brand black color paste produced by Chengdu Lierda new material company. Preferably, the color paste is a diner water-based paint color paste with the product code of 8880718 produced by Beijing Maile chemical technology Limited. Preferably, the use of the present invention comprises the steps of: (1) Mixing sulphoaluminate cement, microbeads, a water reducing agent and a defoaming agent to form a first mixture; (2) Mixing the first mixture with 0.5-0.8 times of color paste to form a second mixture; then mixing the second mixture with the rest color paste to form a third mixture; and mixing the third mixture with water to obtain the grouting material for the semi-flexible pavement. The selection and amounts of the starting materials are as described above. The specific preparation processes and parameters are as described above.
The following examples are presented using the starting materials:
the sulphoaluminate cement is low alkalinity sulphoaluminate cement of Taizhi brand L.SAC 42.5 produced by Zhengzhou royal building cement industry Limited company, and the specific surface area is 400m 2 Kg, initial setting time of 22min, final setting time of 35min,3d compressive strength and flexural strength of 33.7MPa and 6.6MPa respectively, 28d compressive strength and flexural strength of 46.2MPa and 7.0MPa respectively;
the microbeads are "platinum run" type 68153 fine sinking beads made by Henan platinum run casting materials Co., ltd, wherein SiO 2 52wt% of Al 2 O 3 More than or equal to 23wt%, ignition loss less than 0.3wt%, fineness D 10 ＝0.3μm，D 50 ＝1.9μm，D 95 ＝8.5μm；
The water reducing agent is a special SD-600P-R type powdery polycarboxylic acid type water reducing agent for sulphoaluminate cement produced by Shanghai Sanrui high polymer materials Co., ltd, and the water reducing rate is 36%;
the defoaming agent is a VIVID-200 (DFP) type powdery defoaming agent produced by Shanghai Sanrui high polymer materials, the pH value (25 ℃) of the powdery defoaming agent is 7.2, the volume increase rate is 2.1%, and the defoaming time is 3min.
Examples 1 to 3 and comparative example 1
(1) Stirring sulphoaluminate cement, the microbeads, the water reducing agent and the defoaming agent in a planetary stirrer at 40rpm for 25s to form a first mixture;
(2) Adding 2/3 times of color paste into the planetary mixer, and stirring the color paste and the first mixture for 30s at 50rpm to form a second mixture; then stirring the second mixture and the rest 1/3 times of the color paste in a planetary stirrer at 50rpm for 35s to form a third mixture; and adding water into the third mixture, and then stirring for 55 seconds in a planetary stirrer at 55rpm to obtain the grouting material for the semi-flexible pavement.
The color paste is a diner water-based paint color paste (product code 8880718, pigment index number P.BK.7) produced by Beijing Maier chemical engineering technology Limited, the viscosity of the paste is 85KU, the fineness is 23 mu m, the color difference delta E =0.8, the light resistance is 8, and the weather resistance is 5 grades.
The amounts of the components are shown in table 1.
TABLE 1
| Example 1 | Example 2 | Example 3 | Comparative example 1 | |
| Sulphoaluminate cement per weight portion | 60 | 65 | 70 | 60 |
| Micro bead/part by weight | 40 | 35 | 30 | 40 |
| Water reducing agent/part by weight | 0.4 | 0.5 | 0.5 | 0.4 |
| Per part by weight of defoamer | 0.2 | 0.2 | 0.2 | 0.2 |
| Color paste/weight part | 4 | 4 | 3 | -- |
| Water/part by weight | 0.37 | 0.38 | 0.4 | 0.45 |
Comparative example 2
Except that the FBRN8503 type black color paste produced by shanghai laoan paint limited was selected as the color paste, the amount of the microbeads was 40 parts by weight, the water reducing agent was 0.4 part by weight, the color paste was 3 parts by weight, and the water was 0.38 part by weight, the remainder of the example 2 was the same as in example 2, and the color paste used had a viscosity of 65KU, a fineness of 28 μm, a color difference Δ E =0.8, a light resistance of 8, and a weather resistance of 4 grades.
Examples of the experiments
The testing method of the fluidity comprises the following steps:
the determination is carried out according to a determination method of fluidity of cement-based mortar in appendix B of 2009 semi-flexible pavement application technical guidance published by the people traffic press, and the specific method is as follows:
equipment: a funnel: the inner diameter of the upper end is 178mm, the inner diameter of the lower end is 13mm, and the length of the outflow pipe is 38mm.
Before testing, the funnel is calibrated by the following method: the funnel is placed on a funnel support to be stably adjusted, the funnel is firstly wetted by water, then a proper amount of water is poured, timing is started when the water flows out from the lower end of the outflow pipe, and a water adding scale mark when the water outlet time is 8 +/-0.2 s is determined and is used as a mark line of the pouring amount of the grouting material during the testing of the fluidity of the grouting material.
The grouting material is fully and uniformly mixed, and the phenomenon of layering and segregation is avoided; the funnel is stably adjusted; washing the inner wall of the funnel with water to keep the inner wall wet; pouring the uniformly mixed grouting material into the wetted funnel, firstly allowing a proper amount of grouting material to flow out from the lower end of the outflow pipe, then plugging the outflow port at the lower end of the outflow pipe by a finger, and continuously injecting the grouting material into the funnel to reach the mark line; and then releasing the fingers, and starting timing when the grouting material flows out until the moment when the grouting material is instantly and completely interrupted, wherein the moment is the fluidity of the grouting material and is accurate to 0.1s. The same grout was subjected to 3 experiments, and the average was taken as the final result.
The final setting time test method comprises the following steps:
according to a final setting time test method of 8.4 cement in the Standard Water consumption, setting time and stability test method of cement (GB/T1346-2011).
The test method of the homogeneity degree comprises the following steps:
placing the slurry in a beaker, standing for 20min, pouring out the slurry until the slurry is completely interrupted instantly, and counting the amount of the poured slurry as m 1 The mass remaining in the beaker is m 2 Then the homogeneity λ of the slurry is calculated according to the formula:
the test method of the compressive strength comprises the following steps:
according to the test method of the compressive strength of cement mortar in GB/T17671-1999 method for testing the strength of cement mortar.
The method for testing the flexural strength comprises the following steps:
the testing method of the flexural strength refers to the testing method of the flexural strength of the cement mortar in GB/T17671-1999 Cement mortar Strength test method.
The results of the experiment are shown in Table 2.
TABLE 2
As can be seen from Table 2, the flowability and the final set time of examples 1 to 3 were approximately equivalent to those of comparative example 1, but the degree of homogeneity, the compressive strength and the flexural strength of examples 1 to 3 were significantly improved. Although the color paste was also added in comparative example 2, the color paste did not significantly improve the degree of homogeneity, compressive strength and flexural strength of the grouting material.
The present invention is not limited to the above-described embodiments, and any variations, modifications, and substitutions which may occur to those skilled in the art may be made without departing from the spirit of the invention.
Claims (3)
1. The application of the color paste in improving the homogeneity degree of the grouting material for the semi-flexible pavement is characterized in that the grouting material for the semi-flexible pavement is prepared from raw materials consisting of 50-70 parts by weight of sulphoaluminate cement, 30-45 parts by weight of microbeads, 0.2-0.5 part by weight of a water reducing agent, 0.1-0.4 part by weight of an antifoaming agent, 2-5 parts by weight of the color paste and 0.35-0.5 part by weight of water;
wherein the color paste is selected from diner water-based paint color paste with the product code of 8880718 produced by Beijing Maier chemical engineering Co Ltd;
wherein the sulphoaluminate cement is low-alkalinity sulphoaluminate cement; siO in the micro-bead 2 Content is more than or equal to 50wt%, al 2 O 3 The content is more than or equal to 20wt%, the ignition loss of the micro-beads is less than 0.3wt%, D 10 ≤0.5μm，D 50 ≤3μm，D 95 Less than or equal to 10 mu m; the water reducing agent is a polycarboxylic acid type water reducing agent;the defoaming agent is a polyether defoaming agent;
the homogeneity degree of the grouting material for the semi-flexible pavement is more than or equal to 30%, the compressive strength of the grouting material for the semi-flexible pavement after being maintained for 3 hours is more than or equal to 12MPa, the compressive strength of the grouting material for the semi-flexible pavement after being maintained for 7d is more than or equal to 34MPa, the flexural strength of the grouting material for the semi-flexible pavement after being maintained for 3 hours is more than or equal to 2.5MPa, and the flexural strength of the grouting material for the semi-flexible pavement after being maintained for 7d is more than or equal to 4.5MPa.
2. The use according to claim 1, wherein the sulphoaluminate cement is a low alkalinity sulphoaluminate cement of "taozhi" brand l.sac 42.5, manufactured by royal water cement industry limited, zhenzhou city, the microbeads are microbeads of "platinum run" brand 68153, manufactured by platinum run casting materials limited, the water reducer is a polycarboxylic acid type water reducer of SD-600P-R type, manufactured by polymer materials limited, sanui, and the defoamer is a defoamer of vid-200DFP type, manufactured by polymer materials limited, sanui, shanghai.
3. Use according to claim 1, characterized in that it comprises the following steps:
(1) Mixing sulphoaluminate cement, microbeads, a water reducing agent and a defoaming agent to form a first mixture;
(2) Mixing the first mixture with 0.5-0.8 times of color paste to form a second mixture; then mixing the second mixture with the rest color paste to form a third mixture; and mixing the third mixture with water to obtain the grouting material for the semi-flexible pavement.
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