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Hydraulicity cementitious materials and preparation method thereof

A technology of hydraulic cementation and raw materials, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc. The effect of good performance, energy saving, consumption reduction and environmental protection

Inactive Publication Date: 2009-05-06
WUHAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the amount of limestone in cement increases to a certain extent, the strength of cement drops sharply, and it is difficult to meet the requirements of cement use.

Method used

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  • Hydraulicity cementitious materials and preparation method thereof
  • Hydraulicity cementitious materials and preparation method thereof
  • Hydraulicity cementitious materials and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Mix limestone, industrial waste residue, gypsum and additives according to the ratio in Table 1, and grind until the specific surface area is greater than 280m 2 / kg, the hydraulic gelling material is obtained. The industrial waste slag is blast furnace slag, and the admixture is Portland cement clinker mainly composed of calcium silicate, calcium aluminate and calcium aluminoferrite (ie the clinker in Table 1). Then according to the national standard of GB / T 3183-2003 masonry cement, the results are shown in Table 1. It can be seen that each proportion meets the technical requirements of GB / T 3183-2003 masonry cement.

[0023] Table 1. Proportion and properties of hydraulic cementitious materials

[0024]

[0025]

[0026] Note: The limestone used in Table 1 is based on calcium carbonate (CaCO 3 ) as the main component of natural ore, and the gypsum used is natural dihydrate gypsum.

Embodiment 2

[0028] According to the mass percentage of each raw material: limestone 55%, industrial waste residue 30%, gypsum 5%, admixture 10%, choose limestone, industrial waste residue, gypsum and admixture raw materials, standby; used limestone is calcium carbonate (CaCO 3 ) as the main component of natural ore, the gypsum used is natural dihydrate gypsum, the industrial waste slag is blast furnace slag, and the admixture is Portland cement cooked with calcium silicate, calcium aluminate and calcium aluminate iron as the main components. material (ie the clinker in Table 2).

[0029] First mix and grind limestone, clinker and gypsum until the specific surface area is 375m 2 / kg. Separately grind the blast furnace slag to a specific surface area of ​​363m2 / kg. Then, the mixed powder obtained by grinding the three materials of limestone, clinker and gypsum is evenly mixed with blast furnace slag powder to make a hydraulic cementitious material. According to the national standard of G...

Embodiment 3

[0033] Mix various materials according to the ratio in Table 3, and grind until the specific surface area is greater than 280m 2 After / kg, get the hydraulic cementitious material, then check by the national standard of GB / T 3183-2003 masonry cement, the result is as shown in table 4, it can be seen that each proportioning all meets GB / T 3183-2003 masonry cement technical requirements.

[0034] Table 3. Proportioning of hydraulic gelling material, mass percentage (%)

[0035]

Numbering

lime

stone

blast furnace

Slag

steel

slag

pink

coal

Ash

coal

Gangster

stone

dihydrate

plaster

hard

stone

ointment

half water

plaster

Phosphorite

ointment

lime

Hydroxy

Calcium

sulfuric acid

sodium

cooked

Material

C1 55 30 5 10 C2 55 30 5 ...

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Abstract

The invention belongs to the field of building materials, and in particular relates to a hydraulic cementing material and a method for preparing the same. The hydraulic cementing material is characterized in that the cementing material is prepared from raw materials of limestone, industrial residue, gypsum and admixture through mixing, and the mass percents of the raw materials are as follows: 35 to 75 percent of the limestone, 5 to 50 percent of the industrial residue, 0 to 10 percent of the gypsum, and 0 to 20 percent of the admixture, wherein the mass percents of the gypsum and the admixture cannot be 0 simultaneously, and the summation of the mass percent of each raw material is 100 percent. The invention can make full use of a large number of the limestone, and the method has the advantages of simple process, low cost, less energy consumption and environmental protection.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a hydraulic gelling material and a preparation method thereof. Background technique [0002] At present, the amount of cement used in construction mortar accounts for 25% to 35% of the total amount of cement used in construction projects. Usually, 32.5 strength grade cement is used to prepare construction mortar. In order to ensure the workability of mortar, the amount of cement used is often relatively large, which usually results in Waste is not conducive to energy saving and cost reduction. [0003] Limestone is the main raw material for cement production. Usually, limestone, clay, and iron powder are mixed and ground into raw material, calcined into cement clinker, and then mixed into admixture and ground into cement. Limestone calcination not only consumes a lot of energy, but also releases a lot of carbon dioxide gas. [0004] Compared with slag and fly ash, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/24C04B7/36
CPCC04B2111/00017C04B28/16Y02W30/91C04B7/02C04B14/28C04B18/08C04B18/141C04B18/142C04B22/064C04B22/143C04B22/145C04B2103/0094C04B18/12
Inventor 林宗寿赵 前黄 赟刘金军欧小弟
Owner WUHAN UNIV OF TECH
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