Barium sulfate cement modification additive

Abstract

The invention relates to a barium sulfate cement modified additive. The barium sulfate cement modified additive comprises the following components in parts by weight: 100 parts of fine sand, 40-50 parts of fly ash, 10-15 parts of steel powder, 8-12 parts of polylactic acid fiber, 50-60 parts of marble powder and 5-10 parts of silicon dioxide. The cement modifier is convenient to manufacture, and can effectively improve the adhesive property, toughness and strength of cement after being mixed with cement.

Description

Technical Field

[0001] The invention relates to the technical field of cement additives, in particular to a barium sulfate cement modified additive. Background Art

[0002] Barium cement. Cement made by grinding a clinker composed of tribarium silicate or dibarium silicate as the main mineral and adding an appropriate amount of gypsum. The main raw material is barium carbonate (BaCO 3 ) or barium sulfate (BaSO 4 ) and clay. Compared with ordinary concrete, barium cement mortar has the advantages of small shrinkage during drying and strong frost resistance, but it has the disadvantage of poor thermal stability, which will affect the strength and bonding properties of cement, greatly limiting its scope of application. Summary of the invention

[0003] The object of the present invention is to provide a barium sulfate cement modified additive and a preparation method thereof.

[0004] The technical solution adopted by the present invention is: A barium sulfate cement modification additive, wherein the components of the barium sulfate cement modification additive are measured by weight: It is composed of 100 parts of fine sand, 40-50 parts of fly ash, 10-15 parts of steel powder, 8-12 parts of polylactic acid fiber, 50-60 parts of marble powder and 5-10 parts of silicon dioxide; The preparation method of the barium sulfate cement modified additive comprises the following steps: Step 1: Screen the raw materials to remove unqualified materials with larger particle sizes; Step 2, weighing fine sand, fly ash, steel powder, polylactic acid fiber, marble powder, and silicon dioxide according to proportion; Step 3: Add fine sand, fly ash, marble powder and silicon dioxide into the mixing barrel in sequence, stir for two minutes, then add water and continue stirring until the mixture is evenly mixed. Step 4: Continue to gradually add steel powder and polylactic acid fiber into the mixing barrel, and continue to stir until a uniform slurry is obtained; Step five, packaging the slurry to obtain the barium sulfate cement modified additive.

[0005] Furthermore, the components of the barium sulfate cement modification additive are calculated by weight: 100 parts of fine sand, 40 parts of fly ash, 12 parts of steel powder, 10 parts of polylactic acid fiber, 55 parts of marble powder, and 6 parts of silicon dioxide.

[0006] Beneficial effects of the barium sulfate cement modification additive of the present invention: The present invention uses fine sand as the base material, which is fully integrated with the other materials so that it can be evenly mixed with cement mortar during subsequent use; the compound formed by adding fly ash and cement hydration products has higher compressive strength and tensile strength, which can significantly improve the strength of concrete. The addition of fly ash can also reduce the amount of cement, thereby reducing the porosity inside the concrete and further improving the strength; steel powder not only has cementing properties, but also can fully fill the tiny cracks inside the concrete, increase the concrete's resistance to tensile force, and improve the tensile strength of the concrete; polylactic acid fiber can effectively improve the toughness of cement; the fine-grained characteristics of marble powder fill the gaps between cement particles, making the cement denser, thereby enhancing the cohesion and strength of the cement; marble powder can improve the freeze-thaw resistance of cement. The fine-grained characteristics of marble powder can fill the pores of cement, reduce the entry and diffusion of water in the freeze-thaw cycle, and thus reduce freeze-thaw damage; silicon dioxide can react with water to form silicate colloids, which can fill the tiny pores in cement and prevent the penetration of harmful substances such as water, oxygen and carbon dioxide, thereby promoting the hardening process of cement. DETAILED DESCRIPTION

[0007] In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments. Example

[0008] A barium sulfate cement modification additive, wherein the components of the barium sulfate cement modification additive are measured by weight: It is composed of 100 parts of fine sand, 40 parts of fly ash, 12 parts of steel powder, 10 parts of polylactic acid fiber, 55 parts of marble powder and 6 parts of silicon dioxide. Example

[0009] A barium sulfate cement modification additive, wherein the components of the barium sulfate cement modification additive are measured by weight: It is composed of 100 parts of fine sand, 40 parts of fly ash, 12 parts of steel powder, 12 parts of polylactic acid fiber, 58 parts of marble powder and 8 parts of silicon dioxide. Example

[0010] A barium sulfate cement modification additive, wherein the components of the barium sulfate cement modification additive are measured by weight: It is composed of 100 parts of fine sand, 40 parts of fly ash, 12 parts of steel powder, 12 parts of polylactic acid fiber, 60 parts of marble powder and 10 parts of silicon dioxide. Example

[0011] A barium sulfate cement modification additive, wherein the components of the barium sulfate cement modification additive are measured by weight: It is composed of 100 parts of fine sand, 45 parts of fly ash, 10 parts of steel powder, 10 parts of polylactic acid fiber, 60 parts of marble powder and 10 parts of silicon dioxide. Example

[0012] A barium sulfate cement modification additive, wherein the components of the barium sulfate cement modification additive are measured by weight: It is composed of 100 parts of fine sand, 40 parts of fly ash, 10 parts of steel powder, 8 parts of polylactic acid fiber, 55 parts of marble powder and 6 parts of silicon dioxide.

[0013] The preparation method of the barium sulfate cement modified additive comprises the following steps: Step 1: Screen the raw materials to remove unqualified materials with larger particle sizes; Step 2, weighing fine sand, fly ash, steel powder, polylactic acid fiber, marble powder, and silicon dioxide according to proportion; Step 3: Add fine sand, fly ash, marble powder and silicon dioxide into the mixing barrel in sequence, stir for two minutes, then add water and continue stirring until the mixture is evenly mixed. Step 4: Continue to gradually add steel powder and polylactic acid fiber into the mixing barrel, and continue to stir until a uniform slurry is obtained; Step five, packaging the slurry to obtain the barium sulfate cement modified additive.

[0014] The invention is easy to manufacture and can effectively improve the bonding performance, toughness and strength of cement after being mixed with cement.

[0015] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

[0016] Unless otherwise defined, the technical or scientific terms used herein shall have the common meanings understood by persons with ordinary skills in the field to which the present invention belongs. "Include" or "comprising" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, whether direct or indirect.

Claims

1. A barium sulfate cement modification additive, characterized in that: The components of the barium sulfate cement modification additive are calculated by weight: It is composed of 100 parts of fine sand, 40-50 parts of fly ash, 10-15 parts of steel powder, 8-12 parts of polylactic acid fiber, 50-60 parts of marble powder and 5-10 parts of silicon dioxide; The preparation method of the barium sulfate cement modified additive comprises the following steps: Step 1: Screen the raw materials to remove unqualified materials with larger particle sizes; Step 2, weighing fine sand, fly ash, steel powder, polylactic acid fiber, marble powder, and silicon dioxide according to proportion; Step 3: Add fine sand, fly ash, marble powder and silicon dioxide into the mixing barrel in sequence, stir for two minutes, then add water and continue stirring until the mixture is evenly mixed. Step 4: Continue to gradually add steel powder and polylactic acid fiber into the mixing barrel, and continue to stir until a uniform slurry is obtained; Step five, packaging the slurry to obtain the barium sulfate cement modified additive.

2. The barium sulfate cement modifying additive according to claim 1, characterized in that: The components of the barium sulfate cement modification additive are calculated by weight: 100 parts of fine sand, 40 parts of fly ash, 12 parts of steel powder, 10 parts of polylactic acid fiber, 55 parts of marble powder, and 6 parts of silicon dioxide.