CN111205054A - Ternary cementing system support mortar - Google Patents
Ternary cementing system support mortar Download PDFInfo
- Publication number
- CN111205054A CN111205054A CN202010036469.6A CN202010036469A CN111205054A CN 111205054 A CN111205054 A CN 111205054A CN 202010036469 A CN202010036469 A CN 202010036469A CN 111205054 A CN111205054 A CN 111205054A
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- Prior art keywords
- ternary
- parts
- mortar
- agent
- system support
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Classifications
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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
- C04B28/14—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 calcium sulfate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention provides ternary cementing system support mortar which comprises the following components in parts by weight: 20-60 parts of sulpho-aluminous cement; 0-20 parts of ordinary silica cement; 0-10 parts of gypsum; 1-12 parts of bead powder; 20-55 parts of quartz sand; 0.1-0.5 part of a water reducing agent; 0.01-0.5 part of retarder; 0.01-0.2 parts of an early strength agent; 0.01-0.05 part of an expanding agent; 0.01-2 parts of rubber powder; 0.01-0.2 part of defoaming agent. According to the invention, the sulpho-aluminum cement, the ordinary cement and the gypsum are used as a ternary gelling system, and the additives such as the micro-bead powder, the water reducing agent, the retarder, the early strength agent, the expanding agent, the rubber powder and the defoaming agent are additionally arranged in the ternary gelling system, so that the support mortar material can meet the performance requirements in the railway bridge basin support, and particularly, after the micro-bead powder is added and the synergistic effect is realized, the prepared support mortar has good performances such as segregation resistance, high early strength and high flow state.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to ternary cementing system support mortar.
Background
The support mortar is a high-performance modified cement-based grouting material, adopts various organic and inorganic additives, has the characteristics of high strength, no shrinkage, good durability and the like, can be leveled by self-flowing, has long operable time, has smooth and flat surface after completion, and overcomes the defects of unevenness, easy cracking, peeling, powder rising and the like of the traditional mortar.
In the bridge design of high-speed railways and railway passenger dedicated lines, for the installation of cast-in-place beam basin type rubber supports and cylindrical surface rigid supports, the support mortar material needs to meet the requirements of high durability, high strength, good working performance and economy.
The basic requirements of the design of the support mortar material mix proportion need to meet the industrial standard TB/T2332-2013 'railway bridge basin-type support', which is issued by the Ministry of railways, and the support mortar is definitely required to have certain expansibility, hourly strength, flow performance within 30min and the like in the standard specification.
Therefore, it is necessary to design a high early strength and high flow state cementitious material with segregation resistance.
Disclosure of Invention
The invention aims to provide a ternary cementing system support mortar and a preparation method thereof, which are used for realizing a support mortar material with high early strength, high flow state and segregation resistance.
The invention is realized by the following technical scheme: the paint comprises the following components in parts by weight:
in order to better realize the invention, the invention further comprises the following components in parts by weight:
in order to better implement the invention, further, the micro bead powder comprises the following components: SiO 2250～70％；Al2O323～30％；Fe2O31～6％；CaO 0.1～0.8％；MgO 1～3％；Na2O+K2O 0.1～5.0％；C 0.01～3％；TiO20.1～4％。
In order to better implement the invention, further, the micro bead powder comprises the following components: SiO 2255～65％；Al2O326～35％；Fe2O31～5％；CaO 0.2～0.6％；MgO 1～2％；Na2O+K2O 0.5～4.0％；C 0.01～2％；TiO20.5 to 2 percent. The used micro-bead powder Al2O3The higher the content is, the stronger the latent activity is, and the reinforcing effect is better when the high-performance polyurethane admixture is used as an admixture.
In order to better realize the invention, further, the average grain diameter of the micro bead powder is less than or equal to 1.2 μm.
In order to better realize the invention, further, the quartz sand is selected from 20-40 mesh quartz sand; 40-70 mesh quartz sand or 70-100 mesh quartz sand.
In order to better realize the invention, further, the retarder is selected from one or more of sodium gluconate, citric acid, urea, borax, calcium nitrate and sodium hexametaphosphate.
In order to better implement the invention, further, the early strength agent is selected from one or more of sodium sulfate, calcium formate, lithium sulfate and lithium carbonate.
In order to better realize the invention, further, the expanding agent is selected from one or more of iminodiacetonitrile, azodicarbonamide and calcium stearate.
In order to better implement the invention, the water reducing agent is a polycarboxylic acid powder water reducing agent.
The reaction mechanism is as follows:
the invention provides a ternary cementing system support mortar component, wherein a ternary cementing system is composed of ordinary portland cement P.O 42.5.5, sulpho-alumina cement selected from quick-hardening sulpho-alumina cement or ferroaluminate cement, and gypsum selected from α -semi-hydrated gypsum or anhydrous gypsum, quartz sand is added into the ternary cementing system as aggregate, and additives such as water reducing agent, retarder, early strength agent, expanding agent, micro-bead powder, rubber powder, defoaming agent and the like are addedWherein the ternary cementing material is matched with micro bead powder, the average grain diameter of the micro bead powder is less than or equal to 1.2 mu m, and the main component of the micro bead powder comprises SiO255～65％；Al2O326～35％；Fe2O31～5％；CaO 0.2～0.6％；MgO 1～2％；Na2O+K2O0.5～4.0％；C 0.01～2％；TiO20.5-2%; through the synergistic effect of the micro bead powder and the ternary gelling system, the viscosity of slurry is lower and the fluidity is better on the premise of ensuring no sedimentation and segregation, and the micro bead powder mainly plays the aim of segregation resistance.
The expanding agent is a plastic expanding agent, and is preferably one or more of imino diethyl, azodicarbonamide and calcium stearate, and the ternary cementing material and the expanding agent are matched for use, so that the slurry has micro-expansibility in a plastic stage and a hardening later stage, and the free expansion rate is kept between 0.04 and 0.06 percent.
The invention also adds a water reducing agent which is selected from polycarboxylic acid powder water reducing agents and can improve the fluidity of the slurry, thereby improving the working performance of the slurry.
The invention also adds a retarder which is selected from one or more of sodium gluconate, citric acid, urea, borax, calcium nitrate and sodium hexametaphosphate, and can further control the hydration and setting time of cement in the reaction process, thereby ensuring higher controllability.
The invention also adds an early strength agent which is selected from one or more of sodium sulfate, calcium formate, lithium sulfate and lithium carbonate, so that the early strength agent has a hardening acceleration effect.
The defoaming agent is mainly selected from organic silicon defoaming agents, bubbles generated in the slurry in the stirring process can be eliminated, and the mechanical property and the anti-permeability performance are improved.
The invention also adds rubber powder which is redispersible latex powder, particularly selected from vinyl acetate-ethylene copolymer and/or acrylic acid copolymer, and can improve the breaking strength and the binding power of the slurry.
The invention has the beneficial effects that: according to the invention, the sulpho-aluminum cement, the ordinary cement and the gypsum are used as a ternary gelling system, and the additives such as the micro-bead powder, the water reducing agent, the retarder, the early strength agent, the expanding agent, the rubber powder and the defoaming agent are additionally arranged in the ternary gelling system, so that the support mortar material can meet the performance requirements in the railway bridge basin support, and particularly, after the micro-bead powder is added and the synergistic effect is realized, the prepared support mortar has good performances such as segregation resistance, high early strength and high flow state.
The support mortar material can be used for installing and fixing the basin-type rubber support and the cylindrical surface steel support of the high-speed railway bridge, is simple to use, can be stirred by adding water on site, is fully stirred and kept stand without bad phenomena of bleeding, layering and the like, and has good working performance.
The support mortar provided by the invention can realize gravity grouting without external force, and has micro-expansion in both a plastic stage and an expansion stage by arranging the plastic expanding agent.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The ternary gelling system support mortar comprises the following components in parts by weight:
example 2
The ternary gelling system support mortar comprises the following components in parts by weight:
example 3
The ternary gelling system support mortar comprises the following components in parts by weight:
example 4
The ternary gelling system support mortar comprises the following components in parts by weight:
example 5
The ternary gelling system support mortar comprises the following components in parts by weight:
example 6
The ternary gelling system support mortar comprises the following components in parts by weight:
example 7
The ternary gelling system support mortar comprises the following components in parts by weight:
comparative example 1
The ternary gelling system support mortar comprises the following components in parts by weight:
comparative example 2
The support mortar comprises the following components in parts by weight:
comparative example 3
The ternary gelling system support mortar comprises the following components in parts by weight:
comparative example 4
The ternary gelling system support mortar comprises the following components in parts by weight:
comparative example 5
The ternary gelling system support mortar comprises the following components in parts by weight:
carrying out performance tests on the examples 1-7 and the comparative examples 1-5;
the test method and standard are referred to the following national standards:
TB/T2331-
GB/T2419-2016 cement mortar fluidity test method
GB/T50080-2016 concrete mixture performance test method standard
GB 50119 plus 2013 technical Specification for concrete admixture application
GB/T50081-2019 concrete physical and mechanical property test method standard
The test results are shown in the following table:
TABLE 1
TABLE 2
The above experimental table 1 is an example, and mainly discusses the influence of the proportion of the ternary cementing material and the change of the micro-bead powder on the support mortar; table 2 shows comparative examples, which are end points to discuss the effect of ordinary silica, gypsum, microbeads, rubber powder and early strength agents on the support mortar.
The experimental results show that the ternary cementing system support mortar provided by the invention has the same phase
According to comparative analysis of tables 1 and 2, the comparison of properties of the fluidity, the bleeding rate, the strength and the free expansion rate can be seen:
in table 1, examples 3, 4, 5 and 7 have no bleeding, and the fluidity and strength of example 3 are the best. The comparison of the free expansion ratios shows that the expansion ratios of 2d and 28d in examples 3-7 are stable. The performance analysis of the fluidity, the bleeding rate, the strength and the free expansion rate is integrated, and the performance of the embodiment 3 is the best.
In Table 2, comparative examples 1 to 5 are used as endpoint values to discuss the influence of ordinary silica, gypsum, micro-beads, rubber powder and an early strength agent on the support mortar, and it can be seen that the lack of the components can cause the performance defect of the mortar.
Compared with the prior art, the high-strength concrete has stronger performances in the aspects of fluidity, bleeding rate, compressive strength, breaking strength, free expansion rate and the like, and the best performance of the embodiment 3 can be obtained from the table.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The ternary cementing system support mortar is characterized by comprising the following components in parts by weight:
2. the ternary gelling system support mortar of claim 1, comprising the following components in parts by weight:
3. the three-element cementing system support mortar of claim 1, wherein the micro bead powder comprises the following components: SiO 2250～70％；Al2O323～30％；Fe2O31～6％；CaO 0.1～0.8％；MgO 1～3％；Na2O+K2O 0.1～5.0％；C 0.01～3％；TiO20.1～4％。
4. The three-element cementing system support mortar of claim 3, wherein the micro bead powder comprises the following components: SiO 2255～65％；Al2O326～35％；Fe2O31～5％；CaO 0.2～0.6％；MgO 1～2％；Na2O+K2O 0.5～4.0％；C 0.01～2％；TiO20.5～2％。
5. The ternary gelling system support mortar of claim 3 or 4, wherein the mean particle size of the micro-bead powder is less than or equal to 1.2 μm.
6. The ternary gelling system support mortar of claim 1, wherein the quartz sand is selected from 20-40 mesh quartz sand, 40-70 mesh quartz sand and/or 70-100 mesh quartz sand.
7. The ternary gelling system bracket mortar of claim 1, wherein the retarder is selected from one or more of sodium gluconate, citric acid, urea, borax, calcium nitrate and sodium hexametaphosphate.
8. The ternary gelling system mount mortar of claim 1, wherein the early strength agent is selected from one or more of sodium sulfate, calcium formate, lithium sulfate and lithium carbonate.
9. The three-way gelling system mortar according to claim 1, wherein said expanding agent is selected from one or more of iminodiacetonitrile, azodimethylamide, calcium stearate.
10. The ternary gelling system support mortar of claim 1, wherein the water reducing agent is a polycarboxylic acid powder water reducing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010036469.6A CN111205054A (en) | 2020-01-14 | 2020-01-14 | Ternary cementing system support mortar |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010036469.6A CN111205054A (en) | 2020-01-14 | 2020-01-14 | Ternary cementing system support mortar |
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| CN202010036469.6A Pending CN111205054A (en) | 2020-01-14 | 2020-01-14 | Ternary cementing system support mortar |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116535173A (en) * | 2023-05-10 | 2023-08-04 | 贵阳中建西部建设有限公司 | High-temperature-resistant concrete and preparation method thereof |
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| CN104370511A (en) * | 2014-10-23 | 2015-02-25 | 广西南宁柏睿通合成建材科技有限公司 | Bridge bearing mortar and production method thereof |
| CN107793120A (en) * | 2017-11-17 | 2018-03-13 | 芜湖铁路桥梁制造有限公司 | It is a kind of using cement and gypsum as bridge pad mortar basic material of bed material and preparation method thereof |
| CN108147754A (en) * | 2017-12-28 | 2018-06-12 | 长沙善道新材料科技有限公司 | A kind of bearing mortar |
| CN108929090A (en) * | 2018-09-14 | 2018-12-04 | 石家庄国辰知识产权服务有限公司 | A kind of grouting material and preparation method thereof for freeway bridge beam support |
| CN109160793A (en) * | 2018-11-22 | 2019-01-08 | 山西黄河新型化工有限公司 | A kind of support mortar grouting material |
-
2020
- 2020-01-14 CN CN202010036469.6A patent/CN111205054A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104370511A (en) * | 2014-10-23 | 2015-02-25 | 广西南宁柏睿通合成建材科技有限公司 | Bridge bearing mortar and production method thereof |
| CN107793120A (en) * | 2017-11-17 | 2018-03-13 | 芜湖铁路桥梁制造有限公司 | It is a kind of using cement and gypsum as bridge pad mortar basic material of bed material and preparation method thereof |
| CN108147754A (en) * | 2017-12-28 | 2018-06-12 | 长沙善道新材料科技有限公司 | A kind of bearing mortar |
| CN108929090A (en) * | 2018-09-14 | 2018-12-04 | 石家庄国辰知识产权服务有限公司 | A kind of grouting material and preparation method thereof for freeway bridge beam support |
| CN109160793A (en) * | 2018-11-22 | 2019-01-08 | 山西黄河新型化工有限公司 | A kind of support mortar grouting material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116535173A (en) * | 2023-05-10 | 2023-08-04 | 贵阳中建西部建设有限公司 | High-temperature-resistant concrete and preparation method thereof |
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Application publication date: 20200529 |