CN111732366A - Concrete interface treating agent and preparation method thereof - Google Patents
Concrete interface treating agent and preparation method thereof Download PDFInfo
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- CN111732366A CN111732366A CN202010647178.0A CN202010647178A CN111732366A CN 111732366 A CN111732366 A CN 111732366A CN 202010647178 A CN202010647178 A CN 202010647178A CN 111732366 A CN111732366 A CN 111732366A
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- concrete
- interface treating
- concrete interface
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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
- 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
Abstract
The invention provides a concrete interface treating agent and a preparation method thereof, and solves the technical problems that the bonding strength between new and old concrete and between concrete and plastering mortar is not enough, and hollowing and shell formation of a mortar plastering layer can occur in the using process of the concrete interface treating agent in the prior art. The preparation method comprises the following raw materials in parts by weight: 40-50 parts of cement; 20-30 parts of fly ash; 0.02-0.05 part of fiber material; 3-8 parts of a silane coupling agent; 10-20 parts of hard powder; 4-8 parts of redispersible latex powder; 1-3 parts of an excitant; 2-5 parts of an expanding agent; 1-3 parts of shrinkage reducing agent; 1-3 parts of a water reducing agent. The concrete interface treating agent provided by the invention has good bonding strength between new and old concrete and between concrete and plastering mortar in the using process, and can avoid the problems of hollowing and shell formation of a mortar plastering layer as much as possible.
Description
Technical Field
The invention relates to a concrete interface treating agent, in particular to a concrete interface treating agent and a preparation method thereof.
Background
The concrete interface treating agent is also called interface adhesive and interface agent, and is prepared with cement, aggregate, polymer adhesive and various assistants. The material is a novel binding layer processing material modified by high polymer, is gray solid powder in appearance, can form a high-strength hardening body with larger adhesion force and certain toughness with concrete after hydration reaction, and is a surface processing material applied to enhance the surface performance of the concrete or endow the concrete surface with the required functions.
The interface agent is mainly used for treating the surfaces of concrete, aerated concrete, fly ash blocks and the like, solves the problems of difficult bonding of surface layers, hollowing, cracking, peeling and the like of plastering layers caused by water absorption characteristics or smoothness of the surfaces, can enhance the bonding force between new and old concrete and between concrete and plastering mortar, can replace the traditional roughening process, ensures the engineering quality, accelerates the construction progress and the like. It has better adhesion to smooth concrete surface and porous aerated concrete. The light building block can be widely applied to the combined layer treatment of various concrete inner and outer wall surfaces, ceilings and other parts, and the light building block can also be used.
The applicant has found that the prior art has at least the following technical problems:
1. in the process of using the concrete interface treating agent in the prior art, the bonding strength between new and old concrete and between concrete and plastering mortar is not enough, and the problems of hollowing and shell formation of a mortar plastering layer can occur;
2. after the concrete interface treating agent in the prior art is used, corrosion easily occurs between new and old concrete, certain potential safety hazards are caused, and the service life of a project is influenced.
Disclosure of Invention
The invention aims to provide a concrete interface treating agent and a preparation method thereof, and aims to solve the technical problems that in the using process of the concrete interface treating agent in the prior art, the bonding strength between new and old concrete and between concrete and plastering mortar is not enough, and a mortar plastering layer is likely to have hollowing and shell. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a concrete interface treating agent which is prepared from the following raw materials in parts by weight: 40-50 parts of cement; 20-30 parts of fly ash; 0.02-0.05 part of fiber material; 10-20 parts of hard powder; 4-8 parts of redispersible latex powder; 1-3 parts of an excitant; 2-5 parts of an expanding agent; 1-3 parts of shrinkage reducing agent; 1-3 parts of a water reducing agent.
Further, the weight parts of the raw materials are respectively as follows: 42-48 parts of cement; 22-28 parts of fly ash; 0.02-0.04 part of fiber material; 12-18 parts of hard powder; 5-7 parts of redispersible latex powder; 1.5-2.5 parts of an excitant; 3-4 parts of an expanding agent; 1.5-2.5 parts of shrinkage reducing agent; 1.5-2.5 parts of a water reducing agent.
Further, the weight parts of the raw materials are respectively as follows: 45 parts of cement; 25 parts of fly ash; 0.03 part of fiber material; 15 parts of hard powder; 6 parts of redispersible latex powder; 2 parts of an excitant; 2 parts of an expanding agent; 2 parts of shrinkage reducing agent; and 2 parts of a water reducing agent.
Further, the cement comprises Portland cement and sulphoaluminate cement, and the weight ratio of the Portland cement to the sulphoaluminate cement is 6-15: 2-5.
Further, the fiber material comprises polypropylene fiber, polyacrylonitrile fiber, polyethylene fiber and carbon fiber; and the weight ratio of the polypropylene fiber, the polyacrylonitrile fiber, the polyethylene fiber and the carbon fiber is 1:2:1: 1.
Further, the hard powder comprises quartz sand and carborundum, and the weight ratio of the quartz sand to the carborundum is 1-3: 2-4.
Further, the exciting agent comprises nano sodium silicate and nano sodium sulfate, and the weight ratio of the nano sodium silicate to the nano sodium sulfate is 1-3: 1-3.
Further, the expanding agent is a calcium sulphoaluminate expanding agent, a calcium oxide expanding agent or a magnesium oxide expanding agent; the shrinkage reducing agent is polypropylene glycol or methyl ether-based polymer.
Further, the water reducing agent is a polycarboxylic acid water reducing agent.
According to the preparation method of the concrete interface treating agent, the raw materials are added into a stirrer according to the proportion and are uniformly stirred for 10-20min, and then the finished product of the concrete interface treating agent is obtained.
Based on the technical scheme, the embodiment of the invention can at least produce the following technical effects:
(1) the concrete interface treating agent provided by the invention takes cement and fly ash as main raw materials, and the added fiber material can reduce the shrinkage of the interface of new and old concrete; the silane coupling agent can interact with the fiber material, so that the plasticity of the fiber material can be improved, the shrinkage difference with old concrete can be further reduced, and the integrity of the new concrete and the old concrete after bonding can be improved; the added water reducing agent and shrinkage reducing agent can interact with the fiber material and the silane coupling agent, so that the shrinkage of concrete can be further reduced, and the integrity of new and old concrete after bonding is kept; the added hard powder is quartz sand and carborundum, and the integral strength of the bonded new and old concrete can be improved due to the hard powder.
(2) The added redispersible latex powder is water-soluble redispersible powder, can form stable emulsion after being dispersed in water, has good dispersibility and extremely outstanding bonding strength, can ensure that the concrete interface treating agent provided by the invention has super strong bonding strength, and can reduce the surface tension and capillary pore pressure of solution at the concrete interface, obviously reduce the early drying shrinkage of the later poured concrete, reduce the shrinkage deformation difference between the successively poured concrete, and be beneficial to improving the interface bonding strength of the concrete.
(3) In the use process, the concrete interface treating agent provided by the invention has good bonding strength between new and old concrete and between concrete and plastering mortar, and can avoid the problems of hollowing and shell formation of a mortar plastering layer as much as possible; in addition, after the concrete interface treating agent is used, good bonding strength is formed between the new concrete and the old concrete and between the concrete and plastering mortar, so that corrosion is not easy to occur between the new concrete and the old concrete, potential safety hazards caused by the problems can be avoided, and the service life of a project can be prolonged.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
First, preparation example:
description of raw materials: the portland cement is ordinary 425 portland cement, and the sulphoaluminate cement is ordinary 525 sulphoaluminate cement.
1. Raw materials: the raw materials used in examples 1-5 are shown in table 1 below, each expressed in parts by weight:
table 1 examples 1-5 raw material table
2. The preparation method comprises the following steps:
example 1:
adding the raw materials into a stirrer according to the proportion, and stirring uniformly for 15min to obtain the finished product of the concrete interface treating agent.
Example 2:
adding the raw materials into a stirrer according to the proportion, and stirring uniformly for 10min to obtain the finished product of the concrete interface treating agent.
Example 3:
adding the raw materials into a stirrer according to the proportion, and stirring uniformly for 10-20min to obtain the finished product of the concrete interface treating agent.
Example 4 and example 5:
the preparation method is the same as example 1.
Secondly, performance detection:
the physical and mechanical properties of the concrete interface treating agents prepared in the embodiments 1 to 5 of the invention are detected, the detection standard is JC/T907-:
table 2 physical and mechanical properties of the concrete interface treating agents prepared in examples 1 to 5
The concrete interface treating agent prepared in the embodiments 1 to 5 of the invention is applied to interface treatment, and comprises the following steps:
(1) surface treatment of old concrete: roughening the surface of the old concrete, controlling the roughness of a bonding surface to be 3-5 mm, and brushing the roughened old concrete bonding surface twice by using a brush to wet the surface of the old concrete;
(2) slurry preparation and construction: preparing a concrete interface treating agent, namely water in a weight ratio of 2:7, and uniformly mixing the water and the concrete interface treating agent to prepare interface treating agent cement paste;
(3) coating the interface treating agent cement paste prepared in the step (2) on the surface of the old concrete subjected to surface treatment in the step (1), wherein the coating thickness is 1.5-3 mm;
(4) and immediately pouring new concrete after brushing the interface treating agent cement paste.
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.
Claims (10)
1. A concrete interface treating agent is characterized in that: the preparation method comprises the following raw materials in parts by weight: 40-50 parts of cement; 20-30 parts of fly ash; 0.02-0.05 part of fiber material; 3-8 parts of a silane coupling agent; 10-20 parts of hard powder; 4-8 parts of redispersible latex powder; 1-3 parts of an excitant; 2-5 parts of an expanding agent; 1-3 parts of shrinkage reducing agent; 1-3 parts of a water reducing agent.
2. The concrete interface treating agent according to claim 1, wherein: the weight parts of the raw materials are respectively as follows: 42-48 parts of cement; 22-28 parts of fly ash; 0.02-0.04 part of fiber material; 4-7 parts of a silane coupling agent; 12-18 parts of hard powder; 5-7 parts of redispersible latex powder; 1.5-2.5 parts of an excitant; 3-4 parts of an expanding agent; 1.5-2.5 parts of shrinkage reducing agent; 1.5-2.5 parts of a water reducing agent.
3. The concrete interface treating agent according to claim 2, wherein: the weight parts of the raw materials are respectively as follows: 45 parts of cement; 25 parts of fly ash; 0.03 part of fiber material; 6 parts of a silane coupling agent; 15 parts of hard powder; 6 parts of redispersible latex powder; 2 parts of an excitant; 2 parts of an expanding agent; 2 parts of shrinkage reducing agent; and 2 parts of a water reducing agent.
4. The concrete interface treating agent according to any one of claims 1 to 3, wherein: the cement comprises Portland cement and sulphoaluminate cement, and the weight ratio of the Portland cement to the sulphoaluminate cement is 6-15: 2-5.
5. The concrete interface treating agent according to claim 4, wherein: the fiber material comprises polypropylene fiber, polyacrylonitrile fiber, polyethylene fiber and carbon fiber; and the weight ratio of the polypropylene fiber, the polyacrylonitrile fiber, the polyethylene fiber and the carbon fiber is 1:2:1: 1.
6. The concrete interface treating agent according to claim 5, wherein: the hard powder comprises quartz sand and carborundum, and the weight ratio of the quartz sand to the carborundum is 1-3: 2-4.
7. The concrete interface treating agent according to claim 6, wherein: the excitant comprises nano sodium silicate and nano sodium sulfate, and the weight ratio of the nano sodium silicate to the nano sodium sulfate is 1-3: 1-3.
8. The concrete interface treating agent according to claim 7, wherein: the expanding agent is a calcium sulphoaluminate expanding agent, a calcium oxide expanding agent or a magnesium oxide expanding agent; the shrinkage reducing agent is polypropylene glycol or methyl ether-based polymer.
9. The concrete interface treating agent according to claim 8, wherein: the water reducing agent is a polycarboxylic acid water reducing agent.
10. The method for producing a concrete interface treating agent according to any one of claims 1 to 9, characterized in that: adding the raw materials into a stirrer according to the proportion, and stirring uniformly for 10-20min to obtain the finished product of the concrete interface treating agent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010647178.0A CN111732366A (en) | 2020-07-07 | 2020-07-07 | Concrete interface treating agent and preparation method thereof |
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| CN202010647178.0A CN111732366A (en) | 2020-07-07 | 2020-07-07 | Concrete interface treating agent and preparation method thereof |
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| CN111732366A true CN111732366A (en) | 2020-10-02 |
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| CN202010647178.0A Pending CN111732366A (en) | 2020-07-07 | 2020-07-07 | Concrete interface treating agent and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113968697A (en) * | 2021-10-27 | 2022-01-25 | 浙江忠信新型建材股份有限公司 | Dry powder interface treating agent for aerated concrete and preparation method thereof |
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| CN1803432A (en) * | 2006-01-24 | 2006-07-19 | 浙江工业大学 | Concrete mortar interface processing method |
| CN105669145A (en) * | 2016-01-25 | 2016-06-15 | 湖南省建筑工程集团总公司 | High-strength anti-shrinkage concrete interface treating agent |
| CN106007595A (en) * | 2016-05-30 | 2016-10-12 | 江苏名和集团有限公司 | Concrete interface treating agent |
| CN106746836A (en) * | 2017-01-10 | 2017-05-31 | 广西壮族自治区水利科学研究院 | A kind of bonding high corrosion-resistant type concrete interface treating agent and application |
| CN108439920A (en) * | 2018-06-05 | 2018-08-24 | 唐林元 | A kind of air entrained concrete special interface agent |
| CN110357545A (en) * | 2019-08-16 | 2019-10-22 | 广西理工职业技术学院 | Concrete base layer local damage rapid-patching motar and preparation method thereof |
-
2020
- 2020-07-07 CN CN202010647178.0A patent/CN111732366A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1803432A (en) * | 2006-01-24 | 2006-07-19 | 浙江工业大学 | Concrete mortar interface processing method |
| CN105669145A (en) * | 2016-01-25 | 2016-06-15 | 湖南省建筑工程集团总公司 | High-strength anti-shrinkage concrete interface treating agent |
| CN106007595A (en) * | 2016-05-30 | 2016-10-12 | 江苏名和集团有限公司 | Concrete interface treating agent |
| CN106746836A (en) * | 2017-01-10 | 2017-05-31 | 广西壮族自治区水利科学研究院 | A kind of bonding high corrosion-resistant type concrete interface treating agent and application |
| CN108439920A (en) * | 2018-06-05 | 2018-08-24 | 唐林元 | A kind of air entrained concrete special interface agent |
| CN110357545A (en) * | 2019-08-16 | 2019-10-22 | 广西理工职业技术学院 | Concrete base layer local damage rapid-patching motar and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113968697A (en) * | 2021-10-27 | 2022-01-25 | 浙江忠信新型建材股份有限公司 | Dry powder interface treating agent for aerated concrete and preparation method thereof |
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Application publication date: 20201002 |