CN114853440A - HN-S material, preparation method thereof and pavement patching material - Google Patents

HN-S material, preparation method thereof and pavement patching material Download PDF

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CN114853440A
CN114853440A CN202210592524.9A CN202210592524A CN114853440A CN 114853440 A CN114853440 A CN 114853440A CN 202210592524 A CN202210592524 A CN 202210592524A CN 114853440 A CN114853440 A CN 114853440A
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silicon dioxide
modified nano
material according
nano silicon
kaolin
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江贝
王向群
王罡
王�琦
刘辉
陈菲
王建文
李孝利
陈万胜
乔欣
梁帅
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Shandong Running New Material Technology Co ltd
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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
    • C04B28/18—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 mixtures of the silica-lime type
    • C04B28/186—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 mixtures of the silica-lime type containing formed Ca-silicates before the final hardening step
    • C04B28/188—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 mixtures of the silica-lime type containing formed Ca-silicates before the final hardening step the Ca-silicates being present in the starting mixture
    • 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
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02—Treatment
    • C04B20/023—Chemical treatment
    • 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
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • 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
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/10—Accelerators; Activators
    • C04B2103/12—Set accelerators
    • 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
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
    • C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
    • 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)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Silicon Compounds (AREA)

Abstract

The application relates to the technical field of patching material processing, and particularly discloses an HN-S material, a preparation method thereof and a pavement patching material. The HN-S material comprises the following raw materials in percentage by weight: 8-16% of tricalcium silicate, 19-30% of dicalcium silicate, 12-18% of tricalcium aluminate, 15-20% of tetracalcium aluminoferrite, 1-5% of calcium sulfate dihydrate, 2-7% of triethanolamine oleate, 2-7% of silicon dioxide, 8-12% of potassium fluoride, 2-7% of HN-SN accelerator and 6-12% of modified nano silicon dioxide; the preparation method comprises the following steps: mixing the above materials, and grinding. The HN-S material, the preparation method thereof and the pavement patching material have the advantage of improving the strength through the synergistic effect of the raw materials.

Description

HN-S material, preparation method thereof and pavement patching material
Technical Field
The application relates to the technical field of repair material processing, in particular to an HN-S material, a preparation method thereof and a pavement repair material.
Background
The cement road surface repairing material is a material specially used for timely repairing the defects of a cement concrete road surface, such as a pitted surface, a hollowing, peeling, shelling, a crack, exposed ribs and the like, is directly coated on the defect part, is suitable for replacing a cement road surface plate, is suitable for structural damage conditions of road surface breakage, serious fracture and the like, and can realize traffic after the repairing material is completely hardened.
At present, a cement pavement patching material is generally prepared from HN-S material, medium sand and aggregate, water is added, the cement pavement patching material and the medium sand are uniformly mixed to obtain the cement pavement patching material, and when the cement pavement patching material is used, the cement pavement patching material is poured on an original base layer, air bubbles are discharged, and the cement pavement patching material can be obtained after the cement pavement patching material is completely dried. However, as the number of vehicles passing through increases, the road surface is damaged due to the low strength of the road surface repair material, which affects the passing through.
Disclosure of Invention
In order to improve the strength of the pavement patching material, the application provides an HN-S material, a preparation method thereof and the pavement patching material.
In a first aspect, the present application provides an HN-S material, which adopts the following technical scheme:
the HN-S material comprises the following raw materials in percentage by weight: 8-16% of tricalcium silicate, 19-30% of dicalcium silicate, 12-18% of tricalcium aluminate, 15-20% of tetracalcium aluminoferrite, 1-5% of calcium sulfate dihydrate, 2-7% of triethanolamine oleate, 2-7% of silicon dioxide, 8-12% of potassium fluoride, 2-7% of HN-SN accelerator and 6-12% of modified nano silicon dioxide, wherein the modified nano silicon dioxide is prepared by modifying nano silicon dioxide by adopting kaolin.
By adopting the technical scheme, the HN-S material not only improves the compressive strength, but also enhances the fluidity and the workability through the synergistic effect of the raw materials, wherein the compressive strength of 2h is 20.2-31.5MPa, the compressive strength of 3d is 24.9-38.9MPa, the compressive strength of 28d is 51.6-62.1MPa, the slump is 212-275mm, and the expansion degree is 488-565 mm.
Tricalcium silicate is a main component of the HN-S material, can enhance early strength, dicalcium silicate can enhance later strength, tricalcium aluminate and tetracalcium aluminoferrite can also play a certain role in enhancing strength, hydration reaction is realized through tricalcium silicate, dicalcium silicate, tricalcium aluminate and tetracalcium aluminoferrite, stronger hydrated calcium ferrite gel is formed, and strength is further enhanced; calcium sulfate dihydrate is applied to HN-S materials, and can play a role in improving strength; the triethanolamine oleate can improve the fluidity, improve the dispersion of all raw materials and facilitate the mixing to be more uniform; the silicon dioxide can react with calcium hydroxide generated by hydration, so that the durability and the strength are improved; the HN-SN accelerating agent can accelerate the coagulation speed and is convenient for realizing quick traffic.
The modified nano silicon dioxide is prepared by modifying nano silicon dioxide by adopting kaolin, and the kaolin is a clay mineral, has cohesiveness and can improve the strength; the nano silicon dioxide can perform secondary hydration reaction with calcium hydroxide generated by hydration of tricalcium silicate and dicalcium silicate, the content of the calcium hydroxide is reduced, the strength after hardening is improved, and the nano silicon dioxide is small in particle size, can be filled in gaps among raw materials, and can increase the compactness of the HN-S material, so that the strength is improved; in addition, after modification, the nano silicon dioxide can be loaded on the kaolin, so that the dispersion is more uniform, and the strength after hardening is improved through the synergistic effect between the nano silicon dioxide and the kaolin.
Preferably, the method comprises the following steps: the material comprises the following raw materials in percentage by weight: 10-14% of tricalcium silicate, 23-25% of dicalcium silicate, 14-17% of tricalcium aluminate, 16-19% of tetracalcium aluminoferrite, 2-4% of calcium sulfate dihydrate, 4-6% of triethanolamine oleate, 4-6% of silicon dioxide, 9-10% of potassium fluoride, 4-6% of HN-SN accelerator and 7-10% of modified nano silicon dioxide.
By adopting the technical scheme, the strength of the repaired pavement can be further improved by optimizing the mixing amount of each raw material in the HN-S material.
Preferably, the method comprises the following steps: the modified nano silicon dioxide is prepared by the following method: adding nano-silicon dioxide into a hydrochloric acid solution, carrying out ultrasonic dispersion, then adding kaolin, uniformly mixing, then filtering, taking out solids, washing the solids, and drying to obtain the modified nano-titanium dioxide.
Further, the modified nano-silica is prepared by adopting the following method: adding nano silicon dioxide into a hydrochloric acid solution, performing ultrasonic dispersion for 20-40min, then adding kaolin, stirring for 1-2h, then filtering, taking out a solid, washing the solid with a sodium hydroxide solution, and drying to obtain modified nano silicon dioxide;
wherein, the mass fraction of the hydrochloric acid solution is 70-80%, the mass fraction of the sodium hydroxide solution is 70-80%, and the addition amount of the hydrochloric acid solution in each 1g of the nano silicon dioxide is 8-12 mL.
Preferably, the method comprises the following steps: the weight ratio of the kaolin to the nano titanium dioxide is (1.2-1.6): 1.
by adopting the technical scheme, the modified nano-silica is prepared by the preparation method, so that the nano-silica can be better adsorbed on the kaolin, and the mixing amount of the kaolin is limited through the synergistic effect of the kaolin and the nano-silica, so that the strength of the repaired pavement can be improved.
Preferably, the method comprises the following steps: the modified nano-silica is pretreated by the following method before use: adding gamma-propyl trimethoxy silane into the ethanol solution, mixing uniformly, adding the modified nano silicon dioxide, heating to 40-50 ℃, reacting for 3-5h, filtering, washing solids, and drying to obtain the pretreated modified nano silicon dioxide.
Further, the modified nano-silica is pretreated by the following method before use: adding gamma-propyl trimethoxy silane into the ethanol solution, stirring for 30-40min, adding modified nano silicon dioxide, heating to 40-50 ℃, reacting for 3-5h, filtering, washing the solid with water, and drying to obtain pretreated modified nano silicon dioxide;
wherein the mass fraction of the ethanol solution is 70-80%, and the weight ratio of the ethanol solution, the gamma-propyl trimethoxy silane and the modified nano silicon dioxide is (4-6): (1-3): 1.
by adopting the technical scheme, the modified nano-silica is prepared by modifying the nano-silica by kaolin, the specific surface energy of the nano-silica is large, self-agglomeration is easy to generate, the modified nano-silica is modified by gamma-propyl trimethoxy silane, the specific surface energy of the modified nano-silica can be reduced, the occurrence of agglomeration is reduced, the modified nano-silica is beneficial to more uniform dispersion, better exertion is facilitated, and the strength is convenient to improve.
Preferably, the method comprises the following steps: the HN-SN accelerating agent is a mixture of a polycarboxylic acid water reducing agent, boric acid, sodium sulfate, aluminum sulfate and sodium carbonate.
Preferably, the method comprises the following steps: the weight ratio of the polycarboxylic acid water reducing agent to the boric acid to the sodium sulfate to the aluminum sulfate to the sodium carbonate is 1: (0.2-0.4): (1-3): (2-4): (2.7-4.7).
By adopting the technical scheme, the HN-SN quick-setting agent is prepared from the polycarboxylate water reducer, boric acid, sodium sulfate, aluminum sulfate and sodium carbonate, the polycarboxylate water reducer can play a water reducing role, the boric acid plays a water saving role, the sodium sulfate can improve the hardening speed and strength, aluminum ions in the aluminum sulfate can enable cement to be quickly hardened, the quick-setting role is played, the sodium carbonate plays a quick-setting role, the synergistic effect among raw materials is achieved, the addition amount among the raw materials is further limited, and the quick-setting effect can be further improved.
In a second aspect, the present application provides a method for preparing an HN-S material, which adopts the following technical scheme:
a preparation method of HN-S material comprises the following steps:
uniformly mixing tricalcium silicate, dicalcium silicate, tricalcium aluminate, tetracalcium aluminoferrite, calcium sulfate dihydrate, triethanolamine oleate, silicon dioxide, potassium fluoride, HN-SN accelerating agent and modified nano-silicon dioxide, and grinding to obtain the HN-S material.
Further, the preparation method of the HN-S material comprises the following steps:
mixing tricalcium silicate, dicalcium silicate, tricalcium aluminate, tetracalcium aluminoferrite, calcium sulfate dihydrate, triethanolamine oleate, silicon dioxide, potassium fluoride, HN-SN accelerating agent and modified nano-silica, stirring for 2-3h, and grinding until the particle size is 50-100 meshes to obtain the HN-S material.
By adopting the technical scheme, all the raw materials are uniformly mixed, so that all the raw materials are dispersed more uniformly, and the HN-S material is prepared.
Preferably, the method comprises the following steps: the HN-S material is added, and the addition amount of the HN-S material is 0.2-0.3% of the total weight of the pavement patching material.
By adopting the technical scheme, the HN-S material has the function of improving the strength, and can be applied to the pavement patching material to strengthen the strength of the repaired pavement.
In summary, the present application includes at least one of the following beneficial technical effects:
1. because the kaolin is adopted to modify the modified nano-silica, the nano-silica is loaded on the kaolin, and the strength after hardening is improved through the synergistic effect of the kaolin and the kaolin, so that the compressive strength of 2h reaches 31.5MPa, the compressive strength of 3d reaches 38.9MPa, the compressive strength of 28d reaches 62.1MPa, the slump reaches 275mm, and the extensibility reaches 565 mm.
2. The method preferably adopts gamma-propyl trimethoxy silane to pretreat the modified nano silicon dioxide, can reduce the specific surface energy of the nano silicon dioxide, improves the dispersibility, enables the nano silicon dioxide to be mixed with other raw materials of HN-S materials more uniformly, is convenient for better playing a role, and is convenient for improving the strength.
Detailed Description
The present application is described in further detail below with reference to specific contents.
Raw materials
The silica has a melting point of 560 deg.C, a boiling point of 3200 deg.C, and a density of 2.31g/cm 3 The CAS number is 10279-57-9, the relative density is 56.22, the refractive index is 1.45, the particle size is 400-; the kaolin has a density of 2.54g/cm 3 The melting point is 1785 ℃; the nano silicon dioxide has CAS number of 10279-57-9, molecular weight of 60, relative density of 2.319-2.653, melting point of 1750 ℃, particle size of 800 meshes, model number of PST-Q02, and specific surface area of 200m 2 (g) apparent density of 0.1g/cm 3 The pH value is 5-7; gamma-propyl trimethoxy silane with CAS number of 2530-85-0, density of 1.055, product number of 8012; the product number of the polycarboxylic acid water reducing agent is PH 6-8.
Preparation example
Preparation example 1
A modified nano-silica is prepared by the following method:
adding 2kg of nano silicon dioxide into 75% hydrochloric acid solution by mass, performing ultrasonic dispersion for 30min, then adding 2.4kg of kaolin, stirring for 1.5h, then filtering, taking out the solid, washing the solid with 75% sodium hydroxide solution by mass, and drying to obtain modified nano silicon dioxide; wherein the addition amount of the hydrochloric acid solution in 1g of the nano-silica is 10 mL.
Preparation example 2
A modified nano-silica which is different from that of preparation example 1 in the added amount of kaolin, and the added amount of kaolin in preparation example 2 is 2.8 kg.
Preparation example 3
A modified nano-silica which is different from that of preparation example 1 in the added amount of kaolin, and the added amount of kaolin in preparation example 3 is 3.2 kg.
Preparation example 4
The HN-SN accelerating agent is prepared by adopting the following method:
mixing a polycarboxylic acid water reducing agent, boric acid, sodium sulfate, aluminum sulfate and sodium carbonate, stirring for 60min, and grinding to 125 meshes to obtain a HN-SN accelerating agent; wherein the weight ratio of the polycarboxylic acid water reducing agent to the boric acid to the sodium sulfate to the aluminum sulfate to the sodium carbonate is 1:0.3:2:3: 3.7.
Examples
Example 1
HN-S material, the raw material ratio of which is shown in Table 1.
A preparation method of HN-S material comprises the following steps:
mixing tricalcium silicate, dicalcium silicate, tricalcium aluminate, tetracalcium aluminoferrite, calcium sulfate dihydrate, triethanolamine oleate, silicon dioxide, potassium fluoride, the HN-SN accelerating agent prepared in preparation example 4 and the modified nano-silicon dioxide prepared in preparation example 1, stirring for 2.5 hours, and grinding to 75 meshes to obtain the HN-S material.
Examples 2 to 4
HN-S material, which is different from example 1 in the raw material ratio, is shown in Table 1.
TABLE 1 EXAMPLES 1-4 Each raw material content (unit: kg) of HN-S Material
Raw materials Example 1 Example 2 Example 3 Example 4
Tricalcium silicate 11 11 8 8
Dicalcium silicate 30 30 30 30
Tricalcium aluminate 18 18 18 18
Tetra calcium aluminoferrite 15 15 15 15
Calcium sulfate dihydrate 1 1 1 1
Oleic acid triethanolamine 2 2 2 2
Silicon dioxide 2 2 2 2
Potassium fluoride 8 8 8 8
HN-SN accelerating agent 7 6 5 4
Modified nano silicon dioxide 6 7 10 12
Examples 5 to 9
HN-S material, which is different from example 4 in the raw material ratio, is shown in Table 2.
TABLE 2 examples 5-9HN-S materials each amount of raw materials (unit: kg)
Figure BDA0003667678440000051
Figure BDA0003667678440000061
Example 10
HN-S material, which is different from example 7 in that the modified nano-silica in HN-S material is obtained from different sources, and the modified nano-silica in example 10 is obtained by using preparation example 2.
Example 11
HN-S material, which is different from example 7 in the source of modified nano-silica in HN-S material, modified nano-silica in example 11 was prepared by using preparation example 3.
Example 12
An HN-S material which differs from example 10 in that the modified nanosilica was pretreated prior to use using the following method:
adding 2kg of gamma-propyl trimethoxy silane into 5kg of ethanol solution with the mass fraction of 75%, stirring for 35min, adding 1kg of modified nano-silica, heating to 45 ℃, reacting for 4h, filtering, washing the solid with water, and drying to obtain the pretreated modified nano-silica.
Comparative example
Comparative example 1
An HN-S material which differs from example 1 in that the modified nanosilica in the HN-S material is replaced with nanosilica in equal amounts.
Tunnel ratio 2
An HN-S material which differs from example 1 in that the modified nanosilica in the HN-S material was replaced with kaolin in equal amounts.
Comparative example 3
An HN-S material, which is different from the HN-S material in example 1 in that modified nano-silica is not added to the HN-S material.
Application example
Application example 1
A road patching material comprises 200kg of HN-S material prepared in example 1, 256kg of medium sand, 310kg of aggregate with the grain diameter of less than 37.5mm and 4000kg of water.
The road patching material is prepared by the following steps: and mixing the HN-S material, the medium sand, the aggregate and the water, and uniformly stirring to obtain the road patching material.
Application examples 2 to 12
The road repair materials of application examples 2 to 12 were the same as those of application example 1 in the amount of the raw materials, except that the HN-S materials were selected from examples 2 to 12, respectively.
Application of comparative examples 1 to 3
The road patching materials using the comparative examples 1-3 were the same as the raw materials of the application example 1, except that the HN-S materials were selected from the comparative examples 1-3, respectively.
Performance test
The following performance tests were carried out on the road patching materials of application examples 1-12 and application comparative examples 1-3:
compressive strength: the compressive strength of the road repair material was measured according to GB/T17671-2020 Cement mortar Strength test method (ISO method), and the test results are shown in Table 3.
Slump and extensibility: the slump and the extensibility of the road repair material are measured according to GB/T50080-2016 standard of Performance test methods for common concrete mixtures, and the detection results are shown in Table 3.
TABLE 3 test results
Figure BDA0003667678440000071
Figure BDA0003667678440000081
By combining application examples 1-12 and application comparative examples 1-3, the road patching material prepared by the HN-S material not only improves the compressive strength, but also enhances the fluidity and the workability through the synergistic action among the raw materials, wherein the compressive strength of 2h is 20.2-31.5MPa, the compressive strength of 3d is 24.9-38.9MPa, the compressive strength of 28d is 51.6-62.1MPa, the slump is 212-275mm, and the expansibility is 488-565 mm.
By combining application example 1 and application comparative examples 1 to 3, it can be seen that the 2h compressive strength of application example 1 is 20.2MPa, the 3d compressive strength of 24.9MPa, the 28d compressive strength of 51.6MPa, the slump of 212mm, and the extensibility of 488mm are superior to that of application comparative examples 1 to 3, which indicates that the HN-S material is more suitable for the modified nano-silica prepared by modifying the nano-silica with kaolin, and the compressive strength, the slump and the extensibility are further improved by the synergistic effect between the kaolin and the nano-silica, so that the rapid traffic can be realized.
The combination of application examples 1-4 shows that the 2h compressive strength of application example 4 is 25.5MPa, the 3d compressive strength is 30.4MPa, the 28d compressive strength is 56.7MPa, the slump is 241mm, and the extensibility is 525mm, which is superior to other application examples, and shows that the addition amount of the modified nano-silica in application example 4 is more appropriate, the compressive strength can be improved, and the rapid traffic can be realized.
By combining application example 7 and application examples 10 to 11, it can be seen that the compressive strength of 2h in application example 10 is 29.8MPa, the compressive strength of 3d is 35.6MPa, the compressive strength of 28d is 61.2MPa, the slump is 270mm, and the extensibility is 560mm, which is superior to other application examples, and shows that the source of the modified nano-silica in application example 10 is more suitable, and the modified nano-silica prepared by using preparation example 2 is more suitable, so that the compressive strength and the extensibility are further improved.
It can be seen from the combination of application example 10 and application example 12 that the compressive strength of 2h in application example 12 is 31.5MPa, the compressive strength of 3d is 38.9MPa, the compressive strength of 28d is 62.1MPa, the slump is 275mm, and the expansibility is 565mm, which is superior to application example 10, indicating that the modified nano-silica is more suitable for pretreatment before use, and the dispersibility of the modified nano-silica can be improved, so that the modified nano-silica is more uniform in dispersion, convenient to exert the effect, and the compressive strength can be further improved.
The embodiments of the present invention are preferred embodiments of the present application, and the scope of the present application is not limited by the embodiments of the present application, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (9)

1. An HN-S material, characterized by: the material comprises the following raw materials in percentage by weight: 8-16% of tricalcium silicate, 19-30% of dicalcium silicate, 12-18% of tricalcium aluminate, 15-20% of tetracalcium aluminoferrite, 1-5% of calcium sulfate dihydrate, 2-7% of triethanolamine oleate, 2-7% of silicon dioxide, 8-12% of potassium fluoride, 2-7% of HN-SN accelerator and 6-12% of modified nano silicon dioxide, wherein the modified nano silicon dioxide is prepared by modifying nano silicon dioxide by adopting kaolin.
2. A HN-S material according to claim 1, characterized in that: the material comprises the following raw materials in percentage by weight: 10-14% of tricalcium silicate, 23-25% of dicalcium silicate, 14-17% of tricalcium aluminate, 16-19% of tetracalcium aluminoferrite, 2-4% of calcium sulfate dihydrate, 4-6% of triethanolamine oleate, 4-6% of silicon dioxide, 9-10% of potassium fluoride, 4-6% of HN-SN accelerator and 7-10% of modified nano silicon dioxide.
3. A HN-S material according to claim 1, characterized in that: the modified nano silicon dioxide is prepared by the following method: adding nano-silicon dioxide into a hydrochloric acid solution, carrying out ultrasonic dispersion, then adding kaolin, uniformly mixing, then filtering, taking out solids, washing the solids, and drying to obtain the modified nano-titanium dioxide.
4. A HN-S material according to claim 3, characterized in that: the weight ratio of the kaolin to the nano titanium dioxide is (1.2-1.6): 1.
5. a HN-S material according to claim 1, characterized in that: the modified nano-silica is pretreated by the following method before use: adding gamma-propyl trimethoxy silane into the ethanol solution, mixing uniformly, adding the modified nano silicon dioxide, heating to 40-50 ℃, reacting for 3-5h, filtering, washing solids, and drying to obtain the pretreated modified nano silicon dioxide.
6. A HN-S material according to claim 1, characterized in that: the HN-SN accelerating agent is a mixture of a polycarboxylic acid water reducing agent, boric acid, sodium sulfate, aluminum sulfate and sodium carbonate.
7. A HN-S material according to claim 6, characterized in that: the weight ratio of the polycarboxylic acid water reducing agent to the boric acid to the sodium sulfate to the aluminum sulfate to the sodium carbonate is 1: (0.2-0.4): (1-3): (2-4): (2.7-4.7).
8. A method for the preparation of HN-S material according to any one of claims 1 to 7, comprising the steps of:
uniformly mixing tricalcium silicate, dicalcium silicate, tricalcium aluminate, tetracalcium aluminoferrite, calcium sulfate dihydrate, triethanolamine oleate, silicon dioxide, potassium fluoride, HN-SN accelerating agent and modified nano-silicon dioxide, and grinding to obtain the HN-S material.
9. A pavement patching material is characterized in that: which is added with HN-S material according to any one of claims 1-7 in an amount of 0.2-0.3% of the total weight of the pavement patching material.
CN202210592524.9A 2022-04-24 2022-05-28 HN-S material, preparation method thereof and pavement patching material Pending CN114853440A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111777390A (en) * 2020-07-10 2020-10-16 江苏建鸿环保材料科技有限公司 Composite cement-based repairing material, application and use method
CN114180874A (en) * 2021-12-31 2022-03-15 四川赢盛化工有限公司 Additive composition agent of powder rapid repair material and application of additive composition agent in cement concrete
CN114276042A (en) * 2021-12-28 2022-04-05 中铁二局第四工程有限公司 Alkali-free fluorine-free liquid accelerator and preparation method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111777390A (en) * 2020-07-10 2020-10-16 江苏建鸿环保材料科技有限公司 Composite cement-based repairing material, application and use method
CN114276042A (en) * 2021-12-28 2022-04-05 中铁二局第四工程有限公司 Alkali-free fluorine-free liquid accelerator and preparation method thereof
CN114180874A (en) * 2021-12-31 2022-03-15 四川赢盛化工有限公司 Additive composition agent of powder rapid repair material and application of additive composition agent in cement concrete

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