Powdery micro-cement and preparation method thereof

A cement and powder technology, which is applied in the field of powder microcement and its preparation, can solve the problems of alkali return, influence on use, etc., and achieve the effect of reducing alkali return phenomenon.

Active Publication Date: 2022-07-05
河北匠工新型建筑材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the operation, the operator usually mixes the micro-cement with water and then smears it on the wall. However, after the micro-cement is completely dried, white alkaline substances will appear on the wall, that is, the phenomenon of back-alkali. Affect

Method used

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  • Powdery micro-cement and preparation method thereof
  • Powdery micro-cement and preparation method thereof
  • Powdery micro-cement and preparation method thereof

Examples

Experimental program
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preparation example 1

[0039]A modified tuff is prepared by the following method:

[0040] The sodium chloride was put into ethylene glycol, stirred for 25 minutes, then put into tuff, stirred for 35 minutes, filtered, and dried to obtain modified tuff; wherein, the weight ratio of sodium chloride, ethylene glycol, and tuff was 0.07: 7:0.7.

Embodiment 1

[0043] A kind of powdery microcement, its raw material ratio is shown in Table 1.

[0044] Among them, the viscosity of hydroxypropyl methylcellulose was 30000 MPa·s.

[0045] A preparation method of powdery microcement, comprising the steps:

[0046] Mix ordinary Portland cement and high-strength sulfoaluminate cement, stir for 15 minutes, and then add heavy calcium to obtain a mixture; add hydroxypropyl methylcellulose, rubber powder, modified tuff, silica fume, calcium formate to the mixture , sodium citrate, stir for 45min, finally add water reducer and defoamer, stir for 25min to obtain powdery microcement.

Embodiment 2-5

[0048] A kind of powdery micro-cement, the difference between it and Example 1 is that the proportion of raw materials of the micro-cement is different, and the proportion of its raw materials is shown in Table 1.

[0049] Table 1 Example 1-5 microcement content of each raw material (unit: kg)

[0050] raw material Example 1 Example 2 Example 3 Example 4 Example 5 Ordinary Portland Cement 350 350 350 350 350 High-strength sulfoaluminate cement 160 160 160 160 160 heavy calcium 545 545 545 545 545 Hydroxypropylmethylcellulose 2 2 2 2 2 rubber powder 15 15 15 15 15 water reducer 1 1 1 1 1 Sodium citrate 2 2 2 2 2 defoamer 0.3 0.3 0.3 0.3 0.3 Modified tuff 30 45 50 55 65 silica fume 12 12 12 12 12 calcium formate 2 2 2 2 2

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Abstract

The invention relates to the technical field of building materials, and particularly discloses powdery micro cement and a preparation method thereof. The micro cement is prepared from the following raw materials in parts by weight: 350 to 450 parts of ordinary Portland cement, 160 to 320 parts of high-strength sulphoaluminate cement, 545 to 570 parts of heavy calcium carbonate, 2 to 8 parts of hydroxypropyl methyl cellulose, 15 to 45 parts of rubber powder, 1 to 4 parts of a water reducing agent, 2 to 6 parts of sodium citrate, 0.3 to 1.5 parts of a de-foaming agent, 30 to 65 parts of modified tuff, 12 to 25 parts of silica fume and 2 to 8 parts of calcium formate. The preparation method comprises the following steps: uniformly mixing the ordinary Portland cement, the high-strength sulphoaluminate cement and the heavy calcium carbonate to obtain a mixture; and adding other raw materials into the mixture, and uniformly mixing to obtain the powdery micro cement. The powdery micro cement disclosed by the invention has the advantage of reducing alkali efflorescence through the synergistic effect of the raw materials.

Description

technical field [0001] The present application relates to the technical field of building materials, in particular to a powdered microcement and a preparation method thereof. Background technique [0002] Micro-cement is also called decorative cement, art cement, nano-cement, etc. It is a new generation of surface decoration materials emerging in Europe in recent years. It adopts advanced technology and adds trace elements in the production process of cement raw materials, so that traditional cement has unique characteristics. Texture and characteristics; mainly used in architectural finishing engineering materials, such as floors, exposed surfaces, ceilings, buildings, pillars and steps, as well as sculptures, decorative products and tile bonding caulking materials. [0003] Microcement has the advantages of convenient use, easy color adjustment and low price, and is widely used by people. During the operation, the operator usually mixes the micro-cement with water and sme...

Claims

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Application Information

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IPC IPC(8): C04B28/06C04B14/14C04B18/14C04B20/02C04B22/14C04B111/20
CPCC04B28/06C04B20/023C04B14/14C04B18/146C04B22/147C04B2201/50C04B2111/2023C04B7/02C04B14/28C04B24/383C04B24/24C04B2103/302C04B24/06C04B2103/50C04B24/04Y02W30/91
Inventor 田玉军王朋飞薛美海杨光许盼张田赛
Owner 河北匠工新型建筑材料有限公司
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