Mechanism sand dry-mixed mortar and preparation method thereof

A technology for dry-mixed mortar and machine-made sand, applied in the field of building materials, can solve the problems of unreasonable grading, large fineness modulus, poor construction, etc., and achieve the effect of improving product quality, moderate fineness and reasonable grading

Inactive Publication Date: 2018-12-18
北京建工新型建材有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantages are: it requires a large area of ​​raw material stockpile, the mixing ratio is not accurately controlled, and the quality fluctuates greatly, which often causes building quality problems such as shelling and cracking, and causes dust pollution to the environment. Therefore, the quality of mortar cannot be effectively guaranteed. The waste of materials is serious, and environmental protection issues are prominent, seriously affecting the quality of construction projects and building functions
However, compared with river sand, machine-made sand has the following disadvantages: ①The machine-made sand produced by the traditional sand and grav

Method used

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  • Mechanism sand dry-mixed mortar and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Example 1: A machine-made sand dry-mixed mortar is prepared by the following method:

[0051] S1: crush the tailings to obtain tailings sand with a particle size of 0.5-0.35mm;

[0052] S2: Partially screen out the stone powder with a particle size of less than 75 μm in the tailings sand, so that the stone powder content is 1%;

[0053] S3: Dry the machine-made sand, remove dust, control the water content of the machine-made sand to less than 0.4%, and the mud content to less than 1.0%;

[0054] S4: 30kg of cement, 60kg of machine-made sand, 10kg of natural river sand, 10kg of fly ash, 0.1kg of water-retaining thickener, 1kg of ethylene-vinyl acetate copolymer rubber powder, 2kg of metakaolin, 1kg of shell powder and 1kg of polycarboxylic acid The water reducer is dry-mixed and stirred, and the machine-made sand dry-mixed mortar is obtained by mixing evenly.

[0055] Among them, the tailings sand is medium sand in Zone II, with an average particle size of 0.5-0.35mm, ...

Embodiment 2

[0056] Example 2: A machine-made sand dry-mixed mortar is prepared by the following method:

[0057] S1: crush the tailings to obtain tailings sand with a particle size of 0.5-0.35mm;

[0058] S2: Partially screen out the stone powder with a particle size of less than 75 μm in the tailings sand, so that the stone powder content is 1%;

[0059] S3: Dry the machine-made sand, remove dust, control the water content of the machine-made sand to less than 0.4%, and the mud content to less than 1.0%;

[0060] S4: 35kg of cement, 65kg of machine-made sand, 15kg of natural river sand, 13kg of fly ash, 0.3kg of water-retaining thickener, 2kg of ethylene-vinyl acetate copolymer rubber powder, 3kg of metakaolin, 2kg of shell powder and 1.5kg of polycarboxylic acid It is a water reducing agent for dry mixing and stirring, and the machine-made sand dry-mixing mortar is obtained by mixing evenly.

[0061] Among them, the tailings sand is medium sand in Zone II, with an average particle siz...

Embodiment 3

[0062] Example 3: A machine-made sand dry-mixed mortar is prepared by the following method:

[0063] S1: crush the tailings to obtain tailings sand with a particle size of 0.5-0.35mm;

[0064] S2: Partially screen out the stone powder with a particle size of less than 75 μm in the tailings sand, so that the stone powder content is 1%;

[0065] S3: Dry the machine-made sand, remove dust, control the water content of the machine-made sand to less than 0.4%, and the mud content to less than 1.0%;

[0066] S4: 40kg of cement, 70kg of machine-made sand, 20kg of natural river sand, 15kg of fly ash, 0.5kg of water-retaining thickener, 3kg of ethylene-vinyl acetate copolymer rubber powder, 4kg of metakaolin, 3kg of shell powder and 2kg of polycarboxylic acid The water reducer is dry-mixed and stirred, and the machine-made sand dry-mixed mortar is obtained by mixing evenly.

[0067] Among them, the tailings sand is medium sand in Zone II, with an average particle size of 0.5-0.35mm, a ...

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Abstract

The invention discloses a mechanism sand dry-mixed mortar and a preparation method thereof, belonging to the technical field of building materials. According main points in a technical scheme of the invention, the mechanism sand dry-mixed mortar comprises the following components: cement, tailing sand, natural river sand, fly ash, a water-retaining thickener, redispersible latex powder, metakaolin, shell powder and a polycarboxylic acid water reducer. According to the invention, the tailing sand widely available is used as a main fine aggregate, and the compounding of the natural river sand and mechanism sand can make up for the problems of poor grading characteristics and grain shape defects of the mechanism sand; by strictly controlling the content of stone powder in the tailing sand, the processing properties of drying and grading of the tailing sand are improved; gaps in the dry-mixed mortar are filled in by the metakaolin and shell powder, so the compactness and impermeability ofthe hardened mortar are enhanced; the water-retaining and thickening properties of the dry-mixed mortar is improved through the water-retaining thickener; and the raw materials of the dry-mixed mortarare improved in dispersion uniformity and workability is improved, and the adhesion between the raw materials of the dry-mixed mortar is enhanced.

Description

technical field [0001] The invention relates to the technical field of building materials, more specifically, it relates to a machine-made sand dry-mixed mortar and a preparation method thereof. Background technique [0002] Construction mortar is an indispensable building material in civil engineering. Its consumption is large and its scope of use is second only to concrete. Traditional mortar is made by mixing cement, lime paste and sand with water at the construction site. Its disadvantages are: it requires a large area of ​​raw material stockpile, the mixing ratio is not accurately controlled, and the quality fluctuates greatly, which often causes building quality problems such as shelling and cracking, and causes dust pollution to the environment. Therefore, the quality of mortar cannot be effectively guaranteed. The waste of materials is serious, and the environmental protection problems are prominent, which seriously affects the quality of construction projects and bu...

Claims

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Application Information

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IPC IPC(8): C04B28/22C04B18/12C04B14/06C04B20/00
CPCC04B14/068C04B18/12C04B20/0076C04B28/186C04B2201/50C04B7/02C04B18/08C04B14/106C04B14/28C04B24/2623C04B24/24C04B24/383C04B14/102C04B22/148C04B22/16C04B24/18Y02W30/91
Inventor 李茂山张程浩吕腾王军孔凡敏
Owner 北京建工新型建材有限责任公司
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