CN113173752A - Preparation method of durable concrete for bridge pouring - Google Patents
Preparation method of durable concrete for bridge pouring Download PDFInfo
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- CN113173752A CN113173752A CN202110374033.2A CN202110374033A CN113173752A CN 113173752 A CN113173752 A CN 113173752A CN 202110374033 A CN202110374033 A CN 202110374033A CN 113173752 A CN113173752 A CN 113173752A
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- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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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
- C04B2111/20—Resistance against chemical, physical or biological attack
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a preparation method of durable concrete for bridge pouring, which comprises the following steps: preparing materials, wherein the materials prepared by the durable concrete per ton are 150 KG-200 KG of sulfate-resistant portland cement, 65-85KG of C50 steel fiber, 80-120KG of slag, 30-50KG of coarse aggregate, 40-60KG of fine aggregate, 10-30KG of silicon powder, 30KG-60KG of air-entraining water reducer, 30-100KG of antifreeze, 80KG-120KG of sulfate-resistant corrosion preservative and 3-20KG of silane coupling agent. According to the preparation method of the durable concrete for bridge pouring, sulfate-resistant portland cement and slag are used in the preparation process, the acid-base environment resistance of the concrete can be improved, so that the durability of the concrete can be improved, and sulfate-resistant corrosion inhibitors are added, so that ettringite crystal expansion damage, gypsum crystal expansion damage, magnesium salt crystal damage and carbon-sulfur-calcium-silicate crystal damage in the concrete can be prevented, the durability of a concrete structure is improved, and the safe use of a building made of the concrete in the service cycle is ensured.
Description
Technical Field
The invention relates to the technical field of concrete preparation, in particular to a preparation method of durable concrete for bridge pouring.
Background
Concrete is a general term for engineering composite materials in which aggregate is cemented into a whole by a cementing material. The concrete is cement concrete, also called common concrete, which is prepared by mixing cement as cementing material, sand and stone as aggregate, and water (optionally containing additive and admixture) in a certain proportion and stirring.
However, the traditional concrete has the defects of poor durability and poor service life, cannot reach the expected service cycle when being used for bridge pouring in a salt water area, and is easy to cause accidents due to the fact that materials are loosened.
The invention provides a preparation method of durable concrete for bridge pouring.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a preparation method of durable concrete for bridge pouring.
In order to achieve the purpose, the invention adopts the following technical scheme:
the preparation method of the durable concrete for bridge pouring comprises the following steps:
s1, preparation materials: the materials prepared by each ton of the durable concrete are 150-200KG of sulfate-resistant portland cement, 65-85KG of C50 steel fiber, 80-120KG of slag, 30-50KG of coarse aggregate, 40-60KG of fine aggregate, 10-30KG of silicon powder, 30KG-60KG of air-entraining water reducer, 30-100KG of antifreeze, 80KG-120KG of sulfate-resistant corrosion inhibitor, 3-20KG of silane coupling agent and the balance of water;
s2, raw material treatment: grinding the slag prepared in the step S1 to 400m 2/KG-500 m2/KG, and screening the coarse aggregate and the fine aggregate by using an external screening device respectively;
s3, feeding and mixing: respectively adding the slag, the steel fibers, the silicon powder, the coarse aggregate and the fine aggregate which are processed in the step S2 into a stirring hopper of a stirrer, adding a proper amount of water according to the water consumption of common concrete, starting the stirrer for stirring, adding the sulfate-resistant portland cement into the stirring hopper for mixing in the continuous stirring process, and stopping stirring until the mixture is uniformly stirred;
s4, adding an enhancing material: respectively adding an antifreezing agent, an air entraining water reducing agent and a silane coupling agent into the mixture processed in the step S3, and restarting the stirrer to continue stirring;
s5, adding sulfate corrosion resisting preservatives: adding the sulfate corrosion resisting preservative into the mixture processed in the step S4, and continuously stirring under the condition of heat preservation to fully mix the materials;
s6, conveying: and (4) conveying the concrete slurry processed in the step (S5) to a bridge construction site through an external concrete conveying device.
Preferably, the coarse aggregate is broken cobbles, and the fine aggregate is fine river sand.
Preferably, the air-entraining water reducing agent is one or more of modified lignosulphonates and polyalkyl aryl sulphonates.
Preferably, the silane coupling agent is one or more of an aminosilane, an epoxysilane, and a sulfanylsilane.
Preferably, the antifreeze agent is one or more of sodium nitrite and calcium chloride.
The invention has the following beneficial effects:
1. according to the preparation method of the durable concrete for bridge pouring, the C50 steel fibers are added in the preparation process, the structural strength of the concrete can be greatly enhanced, sulfate-resistant portland cement and slag are used in the preparation process, the acid-base environment resistance of the concrete can be improved, the durability of the concrete can be improved, sulfate-resistant corrosion preservatives are added, the expansion damage of ettringite crystals, the expansion damage of gypsum crystals, the damage of magnesium salt crystals and the damage of carbonothiate crystals in the concrete can be prevented, the durability of a concrete structure is improved, and the safe use of a building made of the concrete in the service cycle is ensured.
2. According to the preparation method of the durable concrete for bridge pouring, the air entraining water reducing agent is added in the preparation process, small bubbles which are uniform, stable and not easy to damage can be generated in the concrete, the workability of the concrete is improved, bleeding and segregation are reduced, the impermeability, frost resistance, durability and the like of the concrete are improved, and the antifreezing agent is added in the preparation process, so that the condition that frozen blocks are frozen in the concrete can be avoided, and the quality of concrete buildings is ensured.
Detailed Description
First, example section
Example 1
In this embodiment, the preparation method of the durable concrete for bridge pouring includes the steps of:
s1, preparation materials: the materials prepared by each ton of the durable concrete are 150KG sulfate-resistant portland cement, 65KG C50 steel fiber, 80KG slag, 50KG coarse aggregate, 60KG fine aggregate, 20KG silicon powder, 45KG air-entraining water reducing agent, 60KG antifreeze, 80KG sulfate-resistant corrosion inhibitor and 5KG silane coupling agent;
wherein the coarse aggregate is broken cobbles, the fine aggregate is fine river sand, the air-entraining water reducing agent is modified lignosulfonate, the silane coupling agent is aminosilane, and the antifreezing agent is sodium nitrite;
s2, raw material treatment: grinding the slag prepared in the step S1 to 400m2/KG, and screening the coarse aggregate and the fine aggregate by using an external screening device respectively;
s3, feeding and mixing: respectively adding the slag, the steel fibers, the silicon powder, the coarse aggregate and the fine aggregate which are processed in the step S2 into a stirring hopper of a stirrer, adding a proper amount of water according to the water consumption of common concrete, starting the stirrer to stir for 5min, adding the anti-sulfate portland cement into the stirring hopper to mix in the process of continuously stirring, and stopping stirring until the mixture is uniformly stirred;
s4, adding an enhancing material: respectively adding an antifreezing agent, an air entraining water reducing agent and a silane coupling agent into the mixture processed in the step S3, restarting the stirrer, and continuing stirring for 7 min;
s5, adding sulfate corrosion resisting preservatives: adding the sulfate corrosion resisting preservative into the mixture processed in the step S4, heating the mixture to 15 ℃, and continuously stirring for 15min under the condition of heat preservation to fully mix the materials;
s6, conveying: and (4) conveying the concrete slurry processed in the step (S5) to a bridge construction site through an external concrete conveying device.
Example 2
In this embodiment, the preparation method of the durable concrete for bridge pouring includes the steps of:
s1, preparation materials: materials prepared by each ton of the durable concrete are 180KG sulfate-resistant portland cement, 75KG C50 steel fiber, 100KG slag, 30KG coarse aggregate, 40KG fine aggregate, 20KG silicon powder, 45KG air-entraining water reducing agent, 60KG antifreeze, 80KG sulfate-resistant corrosion inhibitor and 5KG silane coupling agent;
wherein the coarse aggregate is broken cobbles, the fine aggregate is fine river sand, the air-entraining water reducing agent is modified lignosulfonate, the silane coupling agent is aminosilane, and the antifreezing agent is sodium nitrite;
s2, raw material treatment: grinding the slag prepared in the step S1 to 400m2/KG, and screening the coarse aggregate and the fine aggregate by using an external screening device respectively;
s3, feeding and mixing: respectively adding the slag, the steel fibers, the silicon powder, the coarse aggregate and the fine aggregate which are processed in the step S2 into a stirring hopper of a stirrer, adding a proper amount of water according to the water consumption of common concrete, starting the stirrer to stir for 10min, adding the anti-sulfate portland cement into the stirring hopper to mix in the process of continuously stirring, and stopping stirring until the anti-sulfate portland cement is uniformly stirred;
s4, adding an enhancing material: respectively adding an antifreezing agent, an air entraining water reducing agent and a silane coupling agent into the mixture processed in the step S3, restarting the stirrer, and continuing stirring for 7 min;
s5, adding sulfate corrosion resisting preservatives: adding the sulfate corrosion resisting preservative into the mixture processed in the step S4, heating the mixture to 20 ℃, and continuously stirring for 20min under the condition of heat preservation, so that the materials are fully mixed;
s6, conveying: and (4) conveying the concrete slurry processed in the step (S5) to a bridge construction site through an external concrete conveying device.
Example 3
In this embodiment, the preparation method of the durable concrete for bridge pouring includes the steps of:
s1, preparation materials: the materials prepared by each ton of the durable concrete are 200KG sulfate-resistant portland cement, 85KG C50 steel fiber, 120KG slag, 50KG coarse aggregate, 60KG fine aggregate, 20KG silicon powder, 45KG air-entraining water reducing agent, 60KG antifreeze, 80KG sulfate-resistant corrosion inhibitor and 5KG silane coupling agent;
wherein the coarse aggregate is broken cobbles, the fine aggregate is fine river sand, the air-entraining water reducing agent is modified lignosulfonate, the silane coupling agent is aminosilane, and the antifreezing agent is sodium nitrite;
s2, raw material treatment: grinding the slag prepared in the step S1 to 500m2/KG, and screening the coarse aggregate and the fine aggregate respectively by using an external screening device;
s3, feeding and mixing: respectively adding the slag, the steel fibers, the silicon powder, the coarse aggregate and the fine aggregate which are processed in the step S2 into a stirring hopper of a stirrer, adding a proper amount of water according to the water consumption of common concrete, starting the stirrer to stir for 5min, adding the anti-sulfate portland cement into the stirring hopper to mix in the process of continuously stirring, and stopping stirring until the mixture is uniformly stirred;
s4, adding an enhancing material: respectively adding an antifreezing agent, an air entraining water reducing agent and a silane coupling agent into the mixture processed in the step S3, restarting the stirrer, and continuing stirring for 7 min;
s5, adding sulfate corrosion resisting preservatives: adding the sulfate corrosion resisting preservative into the mixture processed in the step S4, heating the mixture to 15 ℃, and continuously stirring for 15min under the condition of heat preservation to fully mix the materials;
s6, conveying: and (4) conveying the concrete slurry processed in the step (S5) to a bridge construction site through an external concrete conveying device.
Example 4
In this embodiment, the preparation method of the durable concrete for bridge pouring includes the steps of:
s1, preparation materials: the materials prepared by each ton of the durable concrete are 200KG sulfate-resistant portland cement, 85KG C50 steel fiber, 120KG slag, 50KG coarse aggregate, 60KG fine aggregate, 30KG silicon powder, 60KG air-entraining water reducing agent, 100KG antifreeze, 120KG sulfate-resistant corrosion inhibitor and 20KG silane coupling agent;
wherein the coarse aggregate is broken cobbles, the fine aggregate is fine river sand, the air-entraining water reducing agent is modified lignosulfonate, the silane coupling agent is aminosilane, and the antifreezing agent is sodium nitrite;
s2, raw material treatment: grinding the slag prepared in the step S1 to 500m2/KG, and screening the coarse aggregate and the fine aggregate respectively by using an external screening device;
s3, feeding and mixing: respectively adding the slag, the steel fibers, the silicon powder, the coarse aggregate and the fine aggregate which are processed in the step S2 into a stirring hopper of a stirrer, adding a proper amount of water according to the water consumption of common concrete, starting the stirrer to stir for 5min, adding the anti-sulfate portland cement into the stirring hopper to mix in the process of continuously stirring, and stopping stirring until the mixture is uniformly stirred;
s4, adding an enhancing material: respectively adding an antifreezing agent, an air entraining water reducing agent and a silane coupling agent into the mixture processed in the step S3, restarting the stirrer, and continuing stirring for 7 min;
s5, adding sulfate corrosion resisting preservatives: adding the sulfate corrosion resisting preservative into the mixture processed in the step S4, heating the mixture to 20 ℃, and continuously stirring for 15min under the condition of heat preservation to fully mix the materials;
s6, conveying: and (4) conveying the concrete slurry processed in the step (S5) to a bridge construction site through an external concrete conveying device.
Second, durable concrete comparison test part
The durable concrete produced by four groups of examples is tested, and a group of common concrete is selected from the market for comparison, and the comparison result is as follows:
hardening time: the same;
ambient temperature at test time: the same;
hardness testing instrument: a 200HV-5 type small load Vickers hardness tester;
and (3) corrosion resistance detection: four groups of block samples of 10cm multiplied by 10cm are respectively taken from the examples and the common concrete in the market after hardening, at room temperature, five block samples are respectively put into enough dilute sulfuric acid solution to be soaked for 15 days, and then five concrete samples are put into enough sodium hydroxide solution with the PH value of 9 to be soaked for 15 days.
From the experimental data in the table, it can be known that the concrete prepared by the method has higher corrosion resistance and durability, so that the concrete is suitable for more use occasions and can be used for pouring bridges, the durability of the bridges can be greatly enhanced, the safety of the bridges in the use period is ensured, the municipal engineering construction expenditure is reduced, the social benefit is improved, and the method is worthy of wide popularization.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. The preparation method of the durable concrete for bridge pouring is characterized by comprising the following steps: the preparation steps of the durable concrete for bridge pouring are as follows:
s1, preparation materials: the materials prepared by each ton of the durable concrete are 150-200KG of sulfate-resistant portland cement, 65-85KG of C50 steel fiber, 80-120KG of slag, 30-50KG of coarse aggregate, 40-60KG of fine aggregate, 10-30KG of silicon powder, 30KG-60KG of air-entraining water reducer, 30-100KG of antifreeze, 80KG-120KG of sulfate-resistant corrosion preservative and 3-20KG of silane coupling agent;
s2, raw material treatment: grinding the slag prepared in the step S1 to 400m 2/KG-500 m2/KG, and screening the coarse aggregate and the fine aggregate by using an external screening device respectively;
s3, feeding and mixing: respectively adding the slag, the steel fibers, the silicon powder, the coarse aggregate and the fine aggregate which are processed in the step S2 into a stirring hopper of a stirrer, adding a proper amount of water according to the water consumption of common concrete, starting the stirrer for stirring, adding the sulfate-resistant portland cement into the stirring hopper for mixing in the continuous stirring process, and stopping stirring until the mixture is uniformly stirred;
s4, adding an enhancing material: respectively adding an antifreezing agent, an air entraining water reducing agent and a silane coupling agent into the mixture processed in the step S3, and restarting the stirrer to continue stirring;
s5, adding sulfate corrosion resisting preservatives: adding the sulfate corrosion resisting preservative into the mixture processed in the step S4, and continuously stirring under the condition of heat preservation to fully mix the materials;
s6, conveying: and (4) conveying the concrete slurry processed in the step (S5) to a bridge construction site through an external concrete conveying device.
2. The method for preparing the durable concrete for bridge pouring according to claim 1, wherein the concrete is prepared by the following steps: the coarse aggregate is made of broken cobbles, and the fine aggregate is made of fine river sand.
3. The method for preparing the durable concrete for bridge pouring according to claim 1, wherein the concrete is prepared by the following steps: the air-entraining water reducing agent is one or more of modified lignosulphonates and polyalkyl aryl sulphonates.
4. The method for preparing the durable concrete for bridge pouring according to claim 1, wherein the concrete is prepared by the following steps: the silane coupling agent is one or more of aminosilane, epoxy silane and sulfenyl silane.
5. The method for preparing the durable concrete for bridge pouring according to claim 1, wherein the concrete is prepared by the following steps: the antifreezing agent is one or more of sodium nitrite and calcium chloride.
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| CN102515646A (en) * | 2011-12-15 | 2012-06-27 | 中建三局建设工程股份有限公司 | Antifreeze anticorrosion durable concrete and preparation method thereof |
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| CN108529977A (en) * | 2018-05-15 | 2018-09-14 | 佛山市华通混凝土有限公司 | A kind of concrete of high-durability and preparation method thereof |
| CN110922125A (en) * | 2019-11-18 | 2020-03-27 | 北京太平洋水泥制品有限公司 | Sulfate erosion resistant concrete and preparation method thereof |
| CN111517718A (en) * | 2020-04-26 | 2020-08-11 | 上海兆捷实业发展有限公司 | Steel fiber high-strength concrete and preparation method thereof |
-
2021
- 2021-04-07 CN CN202110374033.2A patent/CN113173752A/en active Pending
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| CN102515646A (en) * | 2011-12-15 | 2012-06-27 | 中建三局建设工程股份有限公司 | Antifreeze anticorrosion durable concrete and preparation method thereof |
| CN104446194A (en) * | 2014-11-18 | 2015-03-25 | 王文明 | Novel concrete highly resistant to sulfate attack as well as preparation method and application of novel concrete |
| CN108529977A (en) * | 2018-05-15 | 2018-09-14 | 佛山市华通混凝土有限公司 | A kind of concrete of high-durability and preparation method thereof |
| CN110922125A (en) * | 2019-11-18 | 2020-03-27 | 北京太平洋水泥制品有限公司 | Sulfate erosion resistant concrete and preparation method thereof |
| CN111517718A (en) * | 2020-04-26 | 2020-08-11 | 上海兆捷实业发展有限公司 | Steel fiber high-strength concrete and preparation method thereof |
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