A clinker-free white cement

A white cement, clinker-free technology, applied in cement production and other directions, can solve the problems of complex process, environmental pollution and high cost, and achieve the effects of high strength and whiteness, reducing resource shortage and low cost

Active Publication Date: 2017-05-10
SHANDONG HONGYI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the rapid development of the national economy, the people's requirements for the living environment are getting higher and higher, and the amount of white cement in my country is also increasing. However, the production of white cement needs to be prepared by firing special clinker for white cement first and then grinding. Complex process, high energy consumption, high cost, and serious environmental pollution

Method used

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  • A clinker-free white cement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A clinker-free white cement is composed of the following raw materials in parts by weight: 65 parts of slag powder, 6 parts of gypsum, 10 parts of polished brick waste slag powder, 13 parts of calcium carbide slag powder, 5 parts of heavy calcium carbonate, hydration promotion 1 dose;

[0028] As mentioned, the hydration accelerator is prepared by the following steps: add the reactants with the molar ratio of dimethyl diallyl ammonium chloride: acrylamide: itaconic acid as 1:0.2:2 In the reaction kettle with 60% of the total mass of distilled water and 1% of the total mass of the reactants, sodium methacryl sulfonate, after 20 minutes of nitrogen deoxygenation, dropwise add 0.5% of the total mass of the reactants with a mass ratio of 1:2. White block and hydrogen peroxide are used as initiators, react for 3 hours to obtain a copolymer aqueous solution with a molecular weight in the range of 2000-8000, which is the hydration accelerator.

[0029] As stated, the whitenes...

Embodiment 2

[0035] A clinker-free white cement is composed of the following raw materials in parts by weight: 75 parts of slag powder, 5 parts of gypsum, 9 parts of polished brick waste slag powder, 10 parts of calcium carbide slag powder, 4 parts of heavy calcium carbonate, hydration promotion 0.8 part of dose;

[0036]Said, the hydration accelerator is prepared by the following steps: according to the molar ratio of dimethyl diallyl ammonium chloride: acrylamide: acrylic acid is 1:0.8:1.5, add the total mass of reactants In the reaction kettle of 50% distilled water and 1.5% of the total mass of the reactants, sodium methacrylsulfonate, after 15 minutes of deoxygenation by passing nitrogen, add dropwise 1.5% of the total mass of the reactants with a mass ratio of 1:1.5. And hydrogen peroxide as an initiator, react for 5 hours to obtain a copolymer aqueous solution with a molecular weight in the range of 2000-8000, which is the hydration accelerator.

[0037] As stated, the whiteness of...

Embodiment 3

[0043] A clinker-free white cement is composed of the following raw materials in parts by weight: 80 parts of slag powder, 4 parts of gypsum, 7 parts of polished brick waste slag powder, 7 parts of calcium carbide slag powder, 4 parts of heavy calcium carbonate, hydration promotion 0.5 part of agent;

[0044] Said, the hydration accelerator is prepared by the following steps: by dimethyl diallyl ammonium chloride: acrylamide: the molar ratio of maleic acid is 1: 1.5: 0.8 and add the reactant In the reaction kettle with 40% distilled water and 3% sodium methacrylate in the total mass of the reactants, after 15 minutes of deoxygenation with nitrogen, add dropwise 0.5-5% of the total mass of the reactants at a mass ratio of 1:1 The hanging white block and hydrogen peroxide are used as the initiator, and the aqueous solution of the copolymer with a molecular weight in the range of 2000-8000 is obtained after reacting for 6 hours, which is the hydration accelerator.

[0045] As st...

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Abstract

The present invention discloses a non- clinker white cement which is composed of the following raw materials in parts by weight: 65-85 parts of ore slag powder, 3-6 parts of gypsum, 5-10 parts of polished brick waste slag powder, 3-13 parts of carbide slag powder, 3-5 parts of heavy calcium carbonate, and 0.3-1 part of a hydration promoter. The non- clinker white cement is prepared by extensive use of ore slag, polished brick waste slag and carbide slag without calcination, energy consumption is significantly reduced, production cost is reduced, the ecological environment is improved; and the hydration promoter can shorten the incubation period of cement hydration, promotes hydration of mineral particles, and improves the early strength of cement-based materials.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a clinker-free white cement. Background technique [0002] Granulated blast furnace slag (referred to as slag) is a molten material mainly composed of calcium silicate and calcium aluminate discharged during ironmaking, and is a granular active material formed after water quenching and rapid cooling. Generally, it contains 80-90% glass phase, and its main minerals are dicalcium silicate, calcium aluminum feldspar, magnesian feldspar, anorthite, etc. The chemical composition of slag is generally CaO35-45%, SiO 2 25-40%, Al 2 o 3 6-15%, FeO0.5-1%. Quality coefficient of slag (CaO+MgO+AL 2 o 3 ) / (SiO 2 +MnO+TiO 2 ) is larger, the activity of slag is higher, that is, CaO, Al 2 o 3 High content, SiO 2 Slag with low content has high activity. The more vitreous content in granulated blast furnace slag, the better its potential hydraulicity, but the poorer its gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/14C04B7/24
CPCY02P40/10
Inventor 冯恩娟赵洪义张辉赵晓芳张晓娇
Owner SHANDONG HONGYI TECH
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