阅读说明：本技术 自防开裂alc专用粘结砂浆 (Self-cracking-prevention ALC (autoclaved lightweight concrete) special bonding mortar ) 是由 冯玉龙 黄丽媛 黄佩媛 黄诗容 黄伟豪 冯玉婷 于 2021-06-10 设计创作，主要内容包括：本发明公开了自防开裂ALC专用粘结砂浆,包括按照重量百分比计的以下组分：砂50％-62％、水泥32.5％-40％、可再分散乳胶粉1％-2％、聚丙烯纤维1.5％-2％、丙烯酸酯0.5％-1％、纤维素醚1％-1.5％和丁苯乳液1.5％-3.5％,本发明通过通过不同组分的相互配合,使粘结砂浆具有良好的保水性,而且粘结砂浆粘结强度高,防开裂能力强,通过加入的纤维素醚可以大大的提高粘结砂浆的保水性,纤维素醚分子上的羟基和醚键上的氧原子会与水分子缔合成氢键,使游离水变成结合水,从而起到很好的保水作用,通过加入的聚丙烯纤维可以提高粘结砂浆的韧性、抗疲劳性,从而显著减少裂缝的数量,降低生成贯通裂缝的可能性,通过加入的可再分散乳胶粉、丁苯乳液和丙烯酸酯可以增加砂浆的粘结性能,提高砂浆的耐磨性。(The invention discloses self-cracking-prevention ALC (autoclaved lightweight concrete) special bonding mortar which comprises the following components in percentage by weight: 50 to 62 percent of sand, 32.5 to 40 percent of cement, 1 to 2 percent of redispersible latex powder, 1.5 to 2 percent of polypropylene fiber, 0.5 to 1 percent of acrylate, 1 to 1.5 percent of cellulose ether and 1.5 to 3.5 percent of butylbenzene emulsion, the invention ensures that the bonding mortar has good water retention property through the mutual matching of different components, has high bonding strength and strong anti-cracking capability, can greatly improve the water retention property of the bonding mortar through the added cellulose ether, leads the hydroxyl on the cellulose ether and the oxygen atom on the ether bond to be associated with water molecules to form hydrogen bonds, changes the free water into the bonding water, thereby playing a good water retention role, can improve the toughness and the fatigue resistance of the bonding mortar through the added polypropylene fiber, thereby obviously reducing the number of cracks and reducing the possibility of generating through cracks, the bonding property of the mortar can be improved by adding the redispersible latex powder, the styrene-butadiene emulsion and the acrylic ester, and the wear resistance of the mortar is improved.)

1. The self-cracking-prevention ALC special bonding mortar is characterized by comprising the following components in percentage by weight: 50-62% of sand, 32.5-40% of cement, 1-2% of redispersible latex powder, 1.5-2% of polypropylene fiber, 0.5-1% of acrylate, 1-1.5% of cellulose ether and 1.5-3.5% of butylbenzene emulsion.

2. The self-cracking-preventing ALC (autoclaved lightweight concrete) special bonding mortar according to claim 1, characterized in that: the sand is quartz sand with the density of 1.5g/cm³-1.7g/cm³。

3. The self-cracking-preventing ALC (autoclaved lightweight concrete) special bonding mortar according to claim 1, characterized in that: the cement is composite portland cement with the fineness of 65-80 μm.

4. The self-cracking-preventing ALC (autoclaved lightweight concrete) special bonding mortar according to claim 1, characterized in that: the particle size of the redispersible latex powder is 360-400 μm.

5. The self-cracking-preventing ALC (autoclaved lightweight concrete) special bonding mortar according to claim 1, characterized in that: the tensile strength of the polypropylene fiber is 360-380 MPa, and the elastic modulus of the polypropylene fiber is 3.6-4 Gpa.

6. The self-cracking-preventing ALC (autoclaved lightweight concrete) special bonding mortar according to claim 1, characterized in that: the cellulose ether includes any one of methyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose.

7. The preparation method of the self-cracking-prevention ALC (automatic logic level) special bonding mortar of claim 1, characterized by comprising the following steps:

s1, weighing the raw materials according to a set standard;

s2, pouring the redispersible latex powder, the polypropylene fibers, the acrylic ester and the cellulose ether weighed in the S1 into a stirrer, and stirring for 5-15 min;

and S3, when the stirring in the S2 is finished, adding the sand, the cement and the butylbenzene emulsion weighed in the S1 into the stirrer, stirring for 20-40 min, and uniformly stirring to finish the preparation.

8. The preparation method of the self-cracking-prevention ALC special bonding mortar of claim 7, characterized by comprising the following steps: and the rotating speed of the stirrer in the S2 is 50r/min-60 r/min.

9. The preparation method of the self-cracking-prevention ALC special bonding mortar of claim 7, characterized by comprising the following steps: and the rotating speed of the stirrer in the S3 is 120r/min-200 r/min.

Technical Field

The invention relates to the technical field of mortar, in particular to self-cracking-prevention ALC special bonding mortar.

Background

The mortar is a bonding substance used for building bricks on a building, is formed by adding water into sand and cementing materials according to a certain proportion, is also called mortar and is also used as mortar, the mortar is commonly used by cement mortar, mixed mortar, lime mortar and clay mortar, and according to the composition materials, the common mortar can be also divided into lime mortar which is prepared by lime cream, sand and water according to a certain proportion and is generally used for building bodies and plastering layers which have low strength requirements and are not wet; cement mortar, which is prepared from cement, sand and water according to a certain proportion and is generally used for brickworks, wall surfaces or ground surfaces and the like in a humid environment or water; mixed mortar, which is prepared by adding proper admixture such as fly ash, diatomite and the like into cement or lime mortar to save the using amount of cement or lime and improve the workability of the mortar, wherein the common mixed mortar comprises cement lime mortar, cement clay mortar, lime clay mortar and the like, fresh mixed common mortar has good workability, the hardened mortar has required strength and cohesive force, the workability of the mortar is related to the fluidity and water retention property thereof, generally grasped according to construction experience or determined by tests, the compressive strength of the mortar is represented by a mortar label, the common mortar labels are 4, 10, 25, 50, 100 and the like, masonry with high strength requirement and important requirement is required to be more than 100 mortar, the cohesive force of the mortar is enhanced along with the increase of the label, and the mortar is also related to the surface state, cleanness, humidity degree and construction and maintenance conditions of the masonry and the like, therefore, before laying bricks, the bricks are generally wetted to enhance the bonding force between the bricks and mortar and ensure the building quality, and the building mortar and the concrete are different in that the building mortar does not contain coarse aggregate, is prepared by a cementing material, fine aggregate and water according to a certain proportion, and is divided into building mortar and plastering mortar according to the application; the ALC wallboard is usually required to be fixed by using the bonding mortar during installation, but the existing bonding mortar has poor water retention performance and low bonding strength, and the bonding mortar is easy to crack during use, so that the ALC wallboard is not convenient for people to use.

Disclosure of Invention

The invention aims to provide self-cracking-resistant ALC special-purpose bonding mortar to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the self-cracking-prevention ALC special bonding mortar comprises the following components in percentage by weight: 50-62% of sand, 32.5-40% of cement, 1-2% of redispersible latex powder, 1.5-2% of polypropylene fiber, 0.5-1% of acrylate, 1-1.5% of cellulose ether and 1.5-3.5% of butylbenzene emulsion.

As a preferable scheme of the invention, the sand adopts quartz sand, and the density of the quartz sand is 1.5g/cm³-1.7 g/cm³。

As a preferable scheme of the invention, the cement is composite portland cement with the fineness of 65-80 μm.

In a preferable embodiment of the invention, the particle size of the redispersible latex powder is 360 μm to 400 μm.

In a preferable embodiment of the present invention, the tensile strength of the polypropylene fiber is 360Mpa to 380Mpa, and the elastic modulus of the polypropylene fiber is 3.6Gpa to 4 Gpa.

As a preferred embodiment of the present invention, the cellulose ether includes any one of methyl cellulose, hydroxyethyl cellulose, and carboxymethyl cellulose.

The preparation method of the self-cracking-prevention ALC special bonding mortar comprises the following steps:

s1, weighing the raw materials according to a set standard;

s2, pouring the redispersible latex powder, the polypropylene fibers, the acrylic ester and the cellulose ether weighed in the S1 into a stirrer, and stirring for 5-15 min;

and S3, when the stirring in the S2 is finished, adding the sand, the cement and the butylbenzene emulsion weighed in the S1 into the stirrer, stirring for 20-40 min, and uniformly stirring to finish the preparation.

In a preferable embodiment of the present invention, the rotation speed of the stirrer in S2 is 50r/min to 60 r/min.

In a preferable embodiment of the invention, the rotation speed of the stirrer in S3 is 120-200 r/min.

Compared with the prior art, the invention has the beneficial effects that: the bonding mortar has good water retention property, high bonding strength and strong anti-cracking capability through the mutual matching of different components, the water retention property of the bonding mortar can be greatly improved through the added cellulose ether, hydroxyl on the cellulose ether molecule and oxygen atoms on ether bonds can be associated with water molecules to form hydrogen bonds, and free water is changed into bound water, so that the bonding mortar has good water retention effect, the toughness and the fatigue resistance of the bonding mortar can be improved through the added polypropylene fiber, the number of cracks is obviously reduced, the possibility of generating through cracks is reduced, the bonding performance of the mortar can be improved through the added redispersible latex powder, the butylbenzene emulsion and the acrylate, the wear resistance of the mortar is improved, the elongation of the mortar is improved, the impact resistance toughness of the mortar is improved, and the bonding mortar is convenient for people to use.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and 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.

The invention provides a technical scheme that: the self-cracking-prevention ALC special bonding mortar comprises the following components in percentage by weight: 50-62% of sand, 32.5-40% of cement, 1-2% of redispersible latex powder, 1.5-2% of polypropylene fiber, 0.5-1% of acrylate, 1-1.5% of cellulose ether and 1.5-3.5% of butylbenzene emulsion.

Wherein the sand is quartz sand with a density of 1.5g/cm³-1.7g/cm³。

Wherein the cement is composite portland cement with the fineness of 65-80 μm.

Wherein the particle size of the redispersible latex powder is 360-400 μm.

The tensile strength of the polypropylene fiber is 360-380 MPa, and the elastic modulus of the polypropylene fiber is 3.6-4 Gpa.

Wherein the cellulose ether comprises any one of methyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose.

The preparation method of the self-cracking-prevention ALC special bonding mortar comprises the following steps:

s1, weighing the raw materials according to a set standard;

s2, pouring the redispersible latex powder, the polypropylene fibers, the acrylic ester and the cellulose ether weighed in the S1 into a stirrer, and stirring for 5-15 min;

and S3, when the stirring in the S2 is finished, adding the sand, the cement and the butylbenzene emulsion weighed in the S1 into the stirrer, stirring for 20-40 min, and uniformly stirring to finish the preparation.

Wherein the rotating speed of the stirrer in the S2 is 50r/min-60 r/min.

Wherein the rotating speed of the stirrer in the S3 is 120r/min-200 r/min.

Example 1, the self-cracking-prevention ALC special bonding mortar comprises the following components in percentage by weight: 50% of sand, 40% of cement, 2% of redispersible latex powder, 2% of polypropylene fiber, 1% of acrylate, 1.5% of cellulose ether and 3.5% of butylbenzene emulsion.

The preparation method of the self-cracking-prevention ALC special bonding mortar comprises the following steps:

s1, weighing the raw materials according to a set standard;

s2, pouring the redispersible latex powder, the polypropylene fibers, the acrylic ester and the cellulose ether weighed in the S1 into a stirrer, and stirring for 5min at the rotating speed of 60 r/min;

and S3, when the stirring in the S2 is finished, adding the sand, the cement and the butylbenzene emulsion weighed in the S1 into a stirrer, stirring for 20min, wherein the rotation speed of the stirrer is 200r/min, and stirring uniformly to finish the preparation.

Example 2, the self-cracking-prevention ALC special-purpose bonding mortar comprises the following components in percentage by weight: 62% of sand, 32.5% of cement, 1% of redispersible latex powder, 1.5% of polypropylene fiber, 0.5% of acrylate, 1% of cellulose ether and 1.5% of butylbenzene emulsion.

The preparation method of the self-cracking-prevention ALC special bonding mortar comprises the following steps:

s1, weighing the raw materials according to a set standard;

s2, pouring the redispersible latex powder, the polypropylene fibers, the acrylic ester and the cellulose ether weighed in the S1 into a stirrer, and stirring for 15min at the rotating speed of 50 r/min;

and S3, when the stirring in the S2 is finished, adding the sand, the cement and the butylbenzene emulsion weighed in the S1 into a stirrer, stirring for 40min, wherein the rotating speed of the stirrer is 120r/min, and stirring uniformly to finish the preparation.

Example 3, the self-cracking-prevention ALC special-purpose bonding mortar comprises the following components in percentage by weight: 58% of sand, 35% of cement, 1.2% of redispersible latex powder, 1.8% of polypropylene fiber, 0.7% of acrylate, 1.3% of cellulose ether and 2% of butylbenzene emulsion.

The preparation method of the self-cracking-prevention ALC special bonding mortar comprises the following steps:

s1, weighing the raw materials according to a set standard;

s2, pouring the redispersible latex powder, the polypropylene fibers, the acrylic ester and the cellulose ether weighed in the S1 into a stirrer, and stirring for 10min at the rotating speed of 55 r/min;

and S3, when the stirring in the S2 is finished, adding the sand, the cement and the butylbenzene emulsion weighed in the S1 into a stirrer, stirring for 30min, wherein the rotating speed of the stirrer is 160r/min, and stirring uniformly to finish the preparation.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.