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Portland fly-ash cement and preparation method thereof

A technology of Portland cement and sulfoaluminate cement is applied in the field of cement to achieve the effects of reduced production cost, good grindability and simple preparation

Inactive Publication Date: 2018-03-13
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of fly ash Portland cement and its preparation method for the problem of existing fly ash Portland cement, in the situation of increasing the amount of fly ash and reducing the amount of Portland cement clinker To ensure and improve the strength of cement, reduce the cost, and reduce the pollution of fly ash to the environment

Method used

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  • Portland fly-ash cement and preparation method thereof
  • Portland fly-ash cement and preparation method thereof
  • Portland fly-ash cement and preparation method thereof

Examples

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Effect test

Embodiment 1

[0032] A preparation method of fly ash Portland cement, the specific implementation steps are as follows: Portland cement clinker, fly ash, calcium sulfosilicate, and dihydrate gypsum are mixed according to the following mass ratio: Portland cement clinker Mix 60 parts of raw materials, 28 parts of fly ash, 7 parts of calcium sulfosilicate, and 5 parts of dihydrate gypsum, and grind them together until the fineness is less than 10% on a 200-mesh sieve to make cement products. According to the national standard GB1346-2001 "Cement Standard Consistency Water Consumption, Setting Time, Stability Test Method" GB / T17671-1999 "Cement Strength Test Method", respectively test the setting time of cement and mortar strength, the measurement results are as follows:

[0033]

Embodiment 2

[0035]A preparation method of fly ash Portland cement, the specific implementation steps are as follows: Portland cement clinker, fly ash, calcium sulfosilicate, and dihydrate gypsum are mixed according to the following mass ratio: Portland cement clinker 54 parts of raw materials, 33 parts of fly ash, 9 parts of calcium sulfosilicate, and 4 parts of dihydrate gypsum are mixed evenly and then ground together until the fineness is less than 10% of the 200-mesh sieve to make cement products. According to the national standard GB1346-2001 "Cement Standard Consistency Water Consumption, Setting Time, Stability Test Method" GB / T17671-1999 "Cement Strength Test Method", respectively test the setting time of cement and mortar strength, the measurement results are as follows:

[0036]

Embodiment 3

[0038] A preparation method of fly ash Portland cement, the specific implementation steps are as follows: Portland cement clinker, fly ash, calcium sulfosilicate, and dihydrate gypsum are mixed according to the following mass ratio: Portland cement clinker 46 parts of raw materials, 40 parts of fly ash, 12 parts of calcium sulfosilicate, and 2 parts of dihydrate gypsum are mixed evenly and then ground together until the fineness is less than 10% of the 200-mesh sieve to make cement products. According to the national standard GB1346-2001 "Cement Standard Consistency Water Consumption, Setting Time, Stability Test Method" GB / T17671-1999 "Cement Strength Test Method", respectively test the setting time of cement and mortar strength, the measurement results are as follows:

[0039]

[0040] By comparing each embodiment with the blank group without adding calcium sulfosilicate and the same amount of fly ash, it can be seen that the setting time of the fly ash Portland cement of ...

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Abstract

The invention relates to a Portland fly-ash cement and a preparation method thereof. In the method, an intermediate mineral--calcium sulfosilicate formed during the traditional firing process of sulphoaluminate cement clinker is used as a fly ash activity stimulator, and the Portland fly-ash cement is prepared from the following raw materials in percentage by weight: 40 to 68% of Portland cement clinker, 25 to 40% of fly ash, 2 to 6% of gypsum, and 5 to 14% of calcium sulfosilicate. The above-mentioned component materials are prepared in proportion, evenly mixed by a ball mill, and ground to such a fineness that sieving residue is less than or equal to 10% after passing a 200-mesh sieve, thereby obtaining the Portland fly-ash cement. The Portland fly-ash cement provided by the invention has the advantages that under the condition that a large amount of fly ash replaces the silicate cement clinker, the strength of cement is ensured and improved, the production cost of cement is reduced,and the pollution of the fly ash to the environment is reduced; meanwhile, silicate waste residues with high calcium sulfate content can be consumed in the preparation of calcium sulfosilicate mineral, the energy is saved, the consumption is reduced, the process is simple, the implementation is convenient and the like.

Description

technical field [0001] The invention relates to a fly ash Portland cement and a preparation method thereof, belonging to the technical field of cement. Background technique [0002] Fly ash is dust particles discharged from the chimney of thermal power plants using coal powder as fuel, and is a common solid waste. With the rapid development of my country's power industry, the annual discharge of fly ash has been increasing, and the current annual discharge of fly ash has exceeded 500 million tons. The massive stockpiling of fly ash not only takes up a lot of land, but also causes serious pollution to the environment. Therefore, it is very important to realize the resource utilization of fly ash. [0003] With the increasing national strategic demand for energy saving, emission reduction and environmental protection, the production of traditional Portland cement consumes a lot of resources and energy, and emits a lot of CO 2 and face enormous challenges. Reduce energy con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/26C04B7/36
CPCC04B7/26C04B7/36Y02P40/10
Inventor 沈燕李雪飘陈玺张伟杨鼎宜
Owner YANGZHOU UNIV
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