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Novel Portland cement and preparation method thereof

A Portland cement, a new type of technology, applied in the field of new Portland cement and its preparation, can solve the problems of large changes in the heat release rate of the cement system, reduced strength of cement specimens, and different shrinkage rates of cement, etc., to achieve reduction and Chloride ion diffusion inhibition performance, strength increase, seawater erosion resistance effect

Inactive Publication Date: 2018-05-15
天津山水水泥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, during the hardening and curing stage of cement, the heat release rate of the cement system changes greatly, resulting in different shrinkage rates of the cement, and more cracks in the cement during the hardening process, resulting in a decrease in the strength of the obtained cement specimen, and there are potential safety hazards

Method used

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  • Novel Portland cement and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0024] Preparation of external admixture: 1 kg of 1-(3-trifluoromethylphenyl) piperazine hydrochloride and 0.5 kg of 4-(4-fluorobenzoyl) piperidine hydrochloride are put into ethyl acetate, Raise the temperature of ethyl acetate to 31°C, stir evenly until it is completely dissolved, raise the temperature to 63°C for the second time to volatilize the solvent, and obtain the mixture after drying; then add 4kg of silica fume and calcium methacrylate to the mixture Salt hydrate 2kg, after uniform mixing, to obtain external admixture, wherein, the average particle diameter of silica fume is 0.2 μm, and specific surface area is 24m / g; The preparation of new portland cement: take clinker 65kg, superfine slag 17kg, 6kg of limestone, 6kg of gypsum, and 7.5kg of external admixture are uniformly mixed, and uniformly ground in a cement mill to obtain finished cement with an average particle size of 15μm.

Embodiment 2

[0026] Preparation of external ingredients: get 0.8kg of 1-(3-trifluoromethylphenyl)piperazine hydrochloride and 0.4kg of 4-(4-fluorobenzoyl)piperidine hydrochloride and put them into ethanol, Increase the temperature of ethanol to 28°C and stir evenly until it is completely dissolved, then raise the temperature to 66°C for the second time to volatilize the solvent and dry to obtain the mixture; then add 4.8kg of silica fume and hydrated calcium methacrylate to the mixture 1.6kg of material, after uniform mixing, to obtain external admixture, wherein, the average particle size of silica fume is 0.2μm, specific surface area is 28m / g; preparation of new Portland cement: take 60kg of clinker, 15kg of ultrafine slag, limestone 5kg, 5kg of gypsum, and 6kg of external admixture. After uniform mixing, they are evenly ground in a cement mill to obtain finished cement with an average particle size of 17μm.

Embodiment 3

[0028] Preparation of external admixture: 1.2kg of 1-(3-trifluoromethylphenyl)piperazine hydrochloride and 0.4kg of 4-(4-fluorobenzoyl)piperidine hydrochloride were put into methanol, and Raise the temperature of methanol to 28°C, stir evenly until it is completely dissolved, raise the temperature to 66°C for the second time to volatilize the solvent, and dry the mixture to obtain the mixture; then add 3.2kg of silica fume and calcium methacrylate to the mixture for hydration 2.4kg of material, after uniform mixing, to obtain external admixture, wherein, the average particle size of silica fume is 0.3μm, specific surface area is 28m / g; new Portland cement preparation: take clinker 60kg, superfine slag 19kg, limestone 5kg, 5kg of gypsum, and 6kg of external admixture. After uniform mixing, they are evenly ground in a cement mill to obtain finished cement with an average particle size of 17μm.

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Abstract

The invention relates to novel Portland cement. The Portland cement comprises the following raw materials in parts by weight: 60-70 parts of clinker, 15-19 parts of ultrafine slag, 5-7 parts of limestone, 5-7 parts of gypsum, and 6-9 parts of an admixture; the admixture is prepared by silica fume, a methacrylic acid calcium salt hydrate, 1-(3-trifluoromethylphenyl)piperazine monohydrochloride, and4-(4-fluorobenzoyl)piperidine hydrochloride. At early stage of hydration, the novel Portland cement utilizes fluorine ions and calcium ions which are ionized from 1-(3-trifluoromethylphenyl)piperazine monohydrochloride and 4-(4-fluorobenzoyl)piperidine hydrochloride for forming calcium fluoride, so that a lot of calcium ions are consumed, a double electric layer structure is difficult to form onthe surface of C3S, induction period of C3S is shortened and disappear, hydration process is rapidly accelerated, and heat release rate at early stage of hydration is improved. Accordingly, the heat release rate range of the cement in a hardening maintenance phase is floated between 5-10%, cracks in hardened cement are smaller, and the strength of a cement test piece is improved.

Description

technical field [0001] The invention relates to the field of building materials, more specifically, it relates to a novel Portland cement and a preparation method thereof. Background technique [0002] Cement is a powdery hydraulic inorganic gelling material, which can be mixed with water to form a slurry, which can be hardened in air or water, and can firmly bind sand, stone and other materials together. Therefore, at present, cement is usually used to bond concrete made of gravel, sand, etc. The hardened concrete not only has high strength, but also can resist fresh water or salt water erosion. Therefore, cement, as an important cementing material, is widely used in civil engineering, water conservancy, national defense and other projects. [0003] In the process of cement hardening, first, the cement particles react with water, and the heat release rate is very fast, but due to the existence of gypsum, a passivation film will be formed on the surface of the cement partic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/14C04B7/21
CPCC04B7/14C04B7/21Y02P40/10
Inventor 赵光福
Owner 天津山水水泥有限公司
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