Method for processing of pozzolans

A pozzolanic, process-period technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problem that the performance of fly ash cannot be improved, the fluctuation of fly ash performance cannot be avoided, and the final product quality is constant. problems, to achieve the effect of reducing emissions and energy consumption, and increasing the amount of substitution

Active Publication Date: 2011-02-02
PROCEDO ENTERPRISES ETAB
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

All the above known methods either do not lead to a significant improvement of the properties of the fly ash as a concrete component, or do not avoid fluctuations in the properties of the fly ash and guarantee a constant quality of the final product

Method used

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  • Method for processing of pozzolans
  • Method for processing of pozzolans
  • Method for processing of pozzolans

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Experimental program
Comparison scheme
Effect test

Embodiment

[0026] According to the present invention, F fly ash according to ASTM C with the chemical composition and particle size distribution (PSD) shown in Table 1 and Table 2 was tested.

[0027] Table 1. Chemical composition

[0028]

[0029] Table 2. Particle size distribution

[0030]

[0031] Table 3 below shows a 50 / 50 blend by weight of Portland cement (type 1 according to ASIM C 150) and untreated and treated auxiliary adhesive material (SCM) according to the invention according to ASTM C 109 The intensity of development.

[0032] Table 3. Compressive strength development, MPa(psi)

[0033]

[0034] The obtained test results show that the present invention converts the completely inert coarse-grained part with zero pozzolanic activity in the fly ash into an active part that has a significant contribution to the strength. The blended cement containing 50% Portland cement and 50% fly ash treated in accordance with the present invention exhibits a 50 / 50 blend of Class I cement and blast...

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Abstract

Method for processing of pozzolans comprising fly ash such as Class F and/or Class C fly ash used for preparation of mortars and concretes, characterized in that the pozzolans is subjected to a high energetic mechanical processing by means of grinding in a grinding equipment to a fineness of the final product with a retention on a sieve 30 microns being less than 5%, whereby the pozzolan particles receive mechanical impulses when non-cenosphere in the form of coarse scoria particles are disintegrated and whereby the surface of cenosphere grinded particles is activated.

Description

Technical field [0001] The present invention relates to a method of processing pozzolans in the form of fly ash. Background technique [0002] Fly ash is used in the production of concrete, mortar and other cement-containing mixtures. Fly ash is a by-product of coal-fired power plants and is produced in large quantities throughout the world every year. [0003] The method eliminates the changes in the quality of fly ash caused by changes in coal chemical composition and coal combustion process parameters. The treatment of pozzolanic material, ie fly ash, according to the method of the present invention significantly improves the performance of concrete and replaces standard Portland cement at a higher level, which results in significant economic and environmental benefits. [0004] Fly ash generally contains about 85% of glassy amorphous components in the form of cenosphere particles. According to ASTM C 618, fly ash is divided into two categories: Class C and Class F. Class F fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/08C04B20/00C04B40/00
CPCC04B20/026C04B28/021Y02W30/91C04B18/08C04B20/008C04B18/082C04B7/02C04B20/0076C04B40/0042
Inventor V·龙尼I·龙尼C·W·派克
Owner PROCEDO ENTERPRISES ETAB
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