CN113213830A

CN113213830A - Adhesive mortar and preparation method thereof

Info

Publication number: CN113213830A
Application number: CN202110597807.8A
Authority: CN
Inventors: 张伟
Original assignee: Shandong Zhuojun Industrial Co ltd
Current assignee: Shandong Zhuojun Industrial Co ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2021-08-06

Abstract

The bonding mortar and the preparation method thereof comprise the following raw materials in parts by mass: cement: 300-400 parts; fly ash: 40-50 parts; sand: 30-50 parts; cellulose ether: 1.5-3 parts; emulsion powder: 15-20 parts of a solvent; nano-whisker: 1-3 parts. This application adopts cellulose ether, emulsion powder and nanowhisker to mix the setting, then compound fly ash for bonding mortar itself has better anti shrinkage, thereby can be used for in the middle of the bonding of some structures, be unlikely to because shrink etc. lead to bonding inefficacy.

Description

Adhesive mortar and preparation method thereof

Technical Field

The application relates to a bonding mortar and a preparation method thereof.

Background

The adhesive mortar is prepared by mixing cement, quartz sand, polymer cementing agent and various additives uniformly by a machine. The adhesive is mainly used as an adhesive of various products and is also called polymer insulation board adhesive mortar. However, in the bonding process, shrinkage tends to occur to some extent due to its own composition, and in an open space, there is no problem in any way, but in a relatively narrow space, if the bonded object itself has a fixed structure, there is a possibility that the bonded object may be damaged or the bonding force may be reduced.

Disclosure of Invention

In order to solve the problems, the application provides a bonding mortar on one hand, which comprises the following raw materials in parts by mass: cement: 300-400 parts; fly ash: 40-50 parts; sand: 30-50 parts; cellulose ether: 1.5-3 parts; emulsion powder: 15-20 parts of a solvent; nano-whisker: 1-3 parts. This application adopts cellulose ether, emulsion powder and nanowhisker to mix the setting, then compound fly ash for bonding mortar itself has better anti shrinkage, thereby can be used for in the middle of the bonding of some structures, be unlikely to because shrink etc. lead to bonding inefficacy.

Preferably, the length of the carbon fiber filaments is between 1 and 3 mm.

Preferably, the nanowhiskers are chitin nanowhiskers.

Preferably, the composite material also comprises carbon fiber yarns, wherein the carbon fiber yarns comprise the following components in parts by weight: 3-5 parts.

Preferably, the number of the single filaments in the carbon fiber tows of the carbon fiber filaments is not less than 6000.

On the other hand, the preparation method of the bonding mortar is also provided, and comprises the following steps:

firstly, metering cement and fly ash, and then putting into a mixing bin for primary stirring and mixing;

then adding cellulose ether, latex powder, carbon fiber filaments and nano whiskers into the mixing bin to perform secondary stirring and mixing;

and then continuously adding the sand to stir and mix for three times to obtain the bonding mortar. The three-stage mixing mode is adopted, cement and fly ash are mixed firstly, then the components which play a role in connection and shrinkage resistance, particularly nano crystal whiskers, carbon fiber yarns and cellulose ether are put into the mixture, finally sand is put into the mixture, and the mixture is completely mixed to obtain the final bonding mortar.

Preferably, the latex powder is: the time for primary stirring and mixing is 5-10 min; the time for the second mixing is 5-10min, and the time for the third mixing is 3-5 min.

This application can bring following beneficial effect:

1. according to the bonding mortar, the cellulose ether, the latex powder and the nanowhiskers are mixed and then compounded with the fly ash, so that the bonding mortar has good shrinkage resistance, can be used for bonding some structural members, and cannot be bonded to lose efficacy due to shrinkage and the like;

2. the three-stage mixing mode is adopted, cement and fly ash are mixed firstly, then the components which play a role in connection and shrinkage resistance, particularly nano crystal whiskers, carbon fiber yarns and cellulose ether are put into the mixture, finally sand is put into the mixture, and the mixture is completely mixed to obtain the final bonding mortar.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present application will be explained in detail through the following embodiments.

The present application illustrates a specific embodiment of the present application by way of examples of synthesis and characterization, the specific synthesis steps being as follows:

s1, firstly, measuring cement and fly ash, and then putting the cement and fly ash into a mixing bin to perform primary stirring and mixing; the time for primary stirring and mixing is 5-10 min;

s2, adding cellulose ether, latex powder, carbon fiber filaments and nano whiskers into the mixing bin, and stirring and mixing for the second time; the time for the secondary mixing is 5-10 min; the length of the carbon fiber filaments is 1-3 mm; the nano crystal whisker is chitin nano crystal whisker; the number of single filaments in the carbon fiber tows of the carbon fiber filaments is not less than 600;

and S3, continuously adding the sand, and stirring and mixing for three times to obtain the bonding mortar, wherein the time for mixing for three times is 3-5 min. The composition of the various components and the mixing time are shown in table 1.

Table 1:

s4, characterizing the mortar, and testing the drying shrinkage of the mortar according to a test method for basic performance of the building mortar (JGJ70-90), wherein the test method is specifically shown in Table 2.

Table 2:

the above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A bonding mortar, which is characterized in that: the composite material comprises the following raw materials in parts by weight: cement: 300-400 parts; fly ash: 40-50 parts; sand: 30-50 parts; cellulose ether: 1.5-3 parts; emulsion powder: 15-20 parts of a solvent; nano-whisker: 1-3 parts.

2. A bonding mortar according to claim 1, characterized in that: the length of the carbon fiber filaments is between 1 and 3 mm.

3. A bonding mortar according to claim 1, characterized in that: the nano crystal whisker is chitin nano crystal whisker.

4. A bonding mortar according to claim 1, characterized in that: the carbon fiber yarn is characterized by also comprising carbon fiber yarns, wherein the carbon fiber yarns comprise the following components in parts by weight: 3-5 parts.

5. A bonding mortar according to claim 4, characterized in that: the number of single filaments in the carbon fiber tows of the carbon fiber filaments is not less than 6000.

6. A process for the preparation of a bonding mortar according to claim 4, characterized in that: the method comprises the following steps:

and then continuously adding the sand to stir and mix for three times to obtain the bonding mortar.

7. The method for preparing a bonding mortar according to claim 6, wherein: the latex powder is: the time for primary stirring and mixing is 5-10 min; the time for the second mixing is 5-10min, and the time for the third mixing is 3-5 min.