Cement mortar admixture

Abstract

The invention discloses a cement mortar admixture which comprises the following components in percentage by weight: 20 to 30 percent of a surfactant, 0.01 to 0.1 percent of a defoaming agent, 15 to 22 percent of a retarder, 8 to 12 percent of a thickening agent, 25 to 35 percent of viscosity modified filler and the balance of water, and further comprises the following components in percentage by weight: 20 to 30 percent of the surfactant, 0.01 to 0.1 percent of the defoaming agent, 15 to 22 percent of the retarder, 8 to 12 percent of the thickening agent, 25 to 35 percent of the viscosity modified filler and the balance of water. Compared with the prior art, the cement mortar admixture provided by the invention has the advantages that the cement mortar admixture which is high in performance and capable of improving the performance of cement mortar is provided.

Description

Technical Field

[0001] The invention relates to the technical field of cement mortar, in particular to a cement mortar admixture. Background Art

[0002] Cement mortar is a building material that uses cement, sand (fine aggregate) and clean water as the main materials, which are mixed in a specified proportion and stirred thoroughly. It is a very common and important construction material in the construction field. It is widely favored because of its powerful functions, simple preparation, and convenient and reliable use.

[0003] With the rapid development of the construction industry, the public has higher and higher requirements for the performance of cement mortar. In order to make up for the shortcomings of ordinary cement mortar and give full play to the advantages of cement mortar, various admixtures or additives are usually added to cement mortar to optimize the performance and improve the workability, mechanical properties and durability of cement mortar.

[0004] Common mortar admixtures in the prior art cannot effectively solve the applicability of cement mortar and are prone to cause phenomena such as water seepage and segregation of cement mortar. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the above technical defects and provide a high-performance cement mortar admixture that can increase the performance of cement mortar.

[0006] In order to solve the above technical problems, the technical solution provided by the present invention is: a cement mortar admixture, comprising the following components: a surfactant, a defoamer, a retarder, a thickener, a viscosity-modified filler and the balance water, wherein the ratio of each component is: 20-30% of surfactant, 0.01-0.1% of defoamer, 15%-22% of retarder, 8%-12% of thickener, 25-35% of viscosity-modified filler and the balance water.

[0007] Preferably, the surfactant comprises 25%, the defoamer 0.05%, the retarder 17%, the thickener 9%, the viscosity-modifying filler 32.5% and the balance water.

[0008] Preferably, the surfactant is a combination of one or more of sodium rosinate, triterpenoid saponin and sodium lauryl sulfate.

[0009] Preferably, the defoaming agent is one or a combination of silicone defoaming agents and polyether defoaming agents.

[0010] Preferably, the retarder is a combination of one or more of sodium hexametaphosphate, borax, zinc sulfate and sodium pyrophosphate.

[0011] Preferably, the thickener is a combination of one or more of polyacrylamide, polyvinyl acid and polyacrylic acid.

[0012] Preferably, the viscosity-modifying filler includes a combination of one or more of rubber powder, silica fume and fly ash.

[0013] The advantages of the present invention compared with the prior art are: in the present invention, by additionally setting a retarder, a thickener, and a viscosity-modifying filler, the cement slurry can be adapted for use, the application performance of the slurry can be optimized, the slurry has higher bonding performance and crack resistance, the prepared cement slurry can be repaired and thickened, and its tensile bonding strength and durability can be improved. DETAILED DESCRIPTION

[0014] References to embodiments of the present invention will now be provided in detail, one or more examples of which are described below. Each example is provided as an explanation rather than a limitation of the present invention. In fact, it will be apparent to those skilled in the art that various modifications and variations may be made to the present invention without departing from the scope or spirit of the present invention. For example, a feature illustrated or described as part of one embodiment may be used in another embodiment to produce a further embodiment.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0016] The terms "comprises," "comprising," or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0017] Except as shown in the operating examples or otherwise indicated, all numbers used in the specification and claims to indicate the amount of ingredients, physicochemical properties, etc. are understood to be adjusted by the term "about" in all cases. For example, therefore, unless otherwise indicated, the numerical parameters listed in the above specification and the attached claims are approximate values, and those skilled in the art can use the teachings disclosed herein to seek to obtain the desired properties and appropriately change these approximate values. The use of numerical ranges expressed as endpoints includes all numbers within the range and any range within the range, for example, 1 to 5 includes 1, 1.1, 1.3, 1.5, 2, 2.75, 3, 3.80, 4 and 5, etc.

[0018] As shown in combination, a cement mortar admixture includes the following components: a surfactant, a defoamer, a retarder, a thickener, a viscosity-modifying filler and the balance water, wherein the ratio of each component is: 20-30% of surfactant, 0.01-0.1% of defoamer, 15%-22% of retarder, 8%-12% of thickener, 25-35% of viscosity-modifying filler and the balance water.

[0019] When used specifically:

[0020] The surfactant is a combination of one or more of sodium rosin acid, triterpenoid saponin and sodium lauryl sulfate, the defoamer is a combination of one or more of silicone defoamers and polyether defoamers, the retarder is a combination of one or more of sodium hexametaphosphate, borax, zinc sulfate and sodium pyrophosphate, the thickener is a combination of one or more of polyacrylamide, polyvinyl acid and polyacrylic acid, and the viscosity-modifying filler includes a combination of one or more of rubber powder, silica ash and fly ash.

[0021] In one embodiment:

[0022] 25% surfactant, 0.05% defoamer, 17% retarder, 9% thickener, 32.5% viscosity modifying filler and the balance water, wherein the surfactant is sodium lauryl sulfate, the defoamer is a polyether defoamer, which eliminates bubbles in the mortar and improves the uniformity and stability of the mortar, the retarder is a mixture of sodium pyrophosphate and sodium hexametaphosphate, the thickener is polyacrylamide, and the viscosity modifying filler is a combination of rubber powder and silica fume.

[0023] Different from the above embodiments:

[0024] Surfactant 22%, defoamer 0.02%, retarder 20%, thickener 10%, viscosity modifying filler 27.5% and the balance water.

[0025] The prepared admixture is mixed with cement mortar. The mortar after mixing has good working consistency and cohesiveness, high tensile bonding strength and greatly increased durability.

[0026] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0027] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection claimed in the present invention is defined by the attached claims and their equivalents. Therefore, based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0031] The present invention and its implementation methods are described above, and such description is not restrictive. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design structures and embodiments similar to the technical solution without creativity, which should all fall within the protection scope of the present invention.

Claims

1. A cement mortar admixture, characterized in that: The invention comprises the following agents: a surfactant, a defoamer, a retarder, a thickener, a viscosity-modifying filler and the balance water, wherein the ratio of each component is: 20-30% of surfactant, 0.01-0.1% of defoamer, 15-22% of retarder, 8-12% of thickener, 25-35% of viscosity-modifying filler and the balance water.

2. A cement mortar admixture according to claim 1, characterized in that: The ratio of each component is: 25% of the surfactant, 0.05% of the defoamer, 17% of the retarder, 9% of the thickener, 32.5% of the viscosity-modifying filler and the balance of water.

3. A cement mortar admixture according to claim 1, characterized in that: The surfactant is a combination of one or more of sodium rosin acid, triterpenoid saponin and sodium lauryl sulfate.

4. A cement mortar admixture according to claim 1, characterized in that: The defoaming agent is one or a combination of silicone defoaming agents and polyether defoaming agents.

5. A cement mortar admixture according to claim 1, characterized in that: The retarder is a combination of one or more of sodium hexametaphosphate, borax, zinc sulfate and sodium pyrophosphate.

6. A cement mortar admixture according to claim 1, characterized in that: The thickener is a combination of one or more of polyacrylamide, polyvinyl acid and polyacrylic acid.

7. A cement mortar admixture according to claim 1, characterized in that: The viscosity-modifying filler includes a combination of one or more of rubber powder, silica fume and fly ash.