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Rapid hardening sulphate aluminum cement and preparation method thereof

A technology of sulphoaluminate cement and fast-hardening sulphoaluminate, which is applied in the field of cement, can solve problems such as strength shrinkage, achieve the effects of overcoming shrinkage, realizing resource utilization, and improving early strength and later strength

Active Publication Date: 2018-09-04
FUJIAN LONGKING DSDN ENGINEERING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the early strength of rapid hardening sulfoaluminate cement is high, it often has the problem of late strength shrinkage

Method used

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  • Rapid hardening sulphate aluminum cement and preparation method thereof
  • Rapid hardening sulphate aluminum cement and preparation method thereof
  • Rapid hardening sulphate aluminum cement and preparation method thereof

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preparation example Construction

[0032] The present invention also provides a method for preparing the rapid-hardening sulfoaluminate cement described in the above technical solution, comprising the following steps:

[0033] a), sulphoaluminate cement clinker, gypsum and limestone are mixed and ground to obtain the first powder;

[0034] b), the first powder and dry desulfurization ash are mixed and sorted to obtain a second powder;

[0035] c) The second powder is mixed with the coagulation regulator to obtain rapid hardening sulfoaluminate cement.

[0036] In the preparation method of the rapid hardening sulphoaluminate cement provided by the present invention, firstly, the sulphoaluminate cement clinker, gypsum and limestone are mixed and ground. Wherein, the temperature of the grinding is preferably <80°C; the grinding time is preferably 50-100 min, specifically 60 min, 70 min, 80 min or 90 min. After the grinding is completed, the first powder is obtained.

[0037] After the first powder is obtained, ...

Embodiment 1

[0049] 1) Composition design:

[0050]

[0051] 2) Preparation:

[0052] According to the above composition design, add natural gypsum, limestone powder and sulphoaluminate cement clinker to the mill for mixing and grinding (the temperature in the mill is 2 / kg) powder, mixed with coagulation agent to make dry desulfurization ash quick-hardening sulphoaluminate cement.

Embodiment 2

[0054] 1) Composition design:

[0055]

[0056] 2) Preparation:

[0057] According to the above composition design, add natural gypsum, limestone powder and sulphoaluminate cement clinker to the mill for mixing and grinding (the temperature in the mill is 2 / kg) powder, mixed with coagulation agent to make dry desulfurization ash quick-hardening sulphoaluminate cement.

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Abstract

The invention belongs to the field of cement, and particularly relates to rapid hardening sulphate aluminum cement and a preparation method thereof. The cement provided by the invention is prepared from the following components, in percentage by weight: 5-20% of dry desulfurized ash, 60-85% of sulphate aluminum cement clinker, 5-20% of gypsum, 5-25% of limestone and 0-3% of thickening time controlagent. By adding dry desulfurized ash into cement, not only is the disposal problem of a dry desulfurized ash by-product desuflurized ash solved, resource utilization of dry desulfurized ash is achieved, but also the usage amount of gypsum and limestone can be saved, and accordingly the production cost of cement is greatly lowered. Meanwhile addition of dry desulfurized ash can greatly improve the early strength and long-term strength of cement, and overcomes the problem that the long-term strength of cement declines. In addition, after the cement provided by the invention is prepared to be mortar or concrete, the phenomena of dusting and duslting cannot occur in the maintenance process.

Description

technical field [0001] The invention belongs to the field of cement, and in particular relates to a rapid hardening sulfoaluminate cement and a preparation method thereof. Background technique [0002] In recent years, the dry desulfurization process, especially the circulating fluidized bed dry desulfurization process has the characteristics of water saving and energy saving, and has been welcomed by more and more users. In 2009, the Ministry of Environmental Protection specifically listed flue gas circulating fluidized bed dry desulfurization technology in the "2009 Catalog of Environmental Protection Technologies Encouraged by the State". At present, the circulating fluidized bed dry desulfurization process, especially the upgraded dry ultra-clean technology has been fully promoted and applied all over the country. The desulfurization ash produced by the dry desulfurization process is mainly composed of calcium sulfite hemihydrate, calcium sulfate, calcium carbonate and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/32C04B7/36
CPCC04B7/323C04B7/36
Inventor 陈永瑞苏清发赖毅强陈宏卢茂源张原林春源王建春
Owner FUJIAN LONGKING DSDN ENGINEERING CO LTD