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Method for producing a hydraulic composition having entrained air

一种水硬性、组合物的技术，应用在制备生产线,混凝土（其中至少一个组分含有碳质材料领域，能够解决降低吸气剂效率等问题

Inactive Publication Date: 2012-10-03
LAFARGE SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The presence of activated carbon tends to reduce the efficiency of getters present in concrete prepared using clinker

Method used

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  • Method for producing a hydraulic composition having entrained air
  • Method for producing a hydraulic composition having entrained air
  • Method for producing a hydraulic composition having entrained air

Examples

Experimental program
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Effect test

preparation example Construction

[0155] In the method for producing a composition containing fly ash according to the present invention, for example, fly ash is supplied alone through the supply device 1 and conveyed through the conveying device 2 . A given fly ash consists of a powder having an average particle size between 0.1 and 200 microns and preferably below 45 microns.

[0156] At a certain point in the processing line (before and / or after the inerting process), samples of fly ash are taken automatically on a regular or sporadic basis.

[0157] The term "periodic sampling" should be understood as repeated sampling of successive fly ash samples. It may be drawn at regular intervals, such as weekly or daily or hourly, or even every ten minutes or even more frequently. The duration of extraction may also vary from seconds to minutes. It can also be drawn at irregular intervals. For example, if the fly ash has relatively uniform and constant characteristics, the frequency of extraction can be reduced, ...

Embodiment 1

[0228] Example 1 - Formulate the amount of getter to be added to the hydraulic composition to be tested a measurement method

[0229] A first example of the above-described method for preparing a hydraulically setting composition according to the invention was carried out. Fly ash contaminated with activated carbon was simulated using fly ash without activated carbon, to which activated carbon was added. This enables simple variation of the amount of activated carbon associated with the fly ash.

[0230] The reference fly ash was Wilshire fly ash which contained essentially no activated carbon. The reference activated carbon is GLZ50. The reference hydraulic composition corresponds to a mortar according to formulation (1), wherein the fly ash is Wilshire fly ash. The hydraulic binder corresponds to a monolith comprising Portland cement and fly ash. The optimal concentration of getter was considered to be the concentration that resulted in 10% air content. The tests we...

Embodiment 2

[0250] Example 2 - Determination of the amount of inert agent from the methylene blue value of mortar with fly ash

[0251] A third example of the above-described method for preparing a hydraulically setting composition according to the invention was carried out. In this example, the inert used was Pluronic® by BASF under the trade name Pluronic TM Inert agent sold under RPE 1720. Pluronic TM RPE 1720 inert is a PO / EO / PO type triblock polymer (polypropylene oxide / polyethylene oxide / polypropylene oxide) with a molecular weight of 2150 g / mol containing 20% ​​ethylene oxide content. The reference fly ash is Wilshire fly ash. The reference activated carbon is GLZ50. The reference hydraulic composition corresponds to the mortar according to formulation (1) and contains 100 ppm of getter. The optimal concentration of the inert agent was considered to be that which resulted in a 10% air content. The tests were carried out by varying the amount of activated carbon added to t...

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Abstract

The present invention relates to a treatment method for manufacturing a hydraulic composition having entrained air, said hydraulic composition including at least one additive and a component including carbon materials. The method includes: obtaining a value representing the adsorption of molecules sought by the carbon materials; and manufacturing the hydraulic composition or treating said component with an amount of additive dependent on said value.

Description

technical field [0001] The present invention relates to a process for the production of hydraulically setting compositions with entrapped air, in particular concrete, in which at least one component contains carbonaceous material, and a related production line. Background technique [0002] In order to reduce carbon dioxide emissions from clinker production methods, the current trend is to reduce the amount of clinker in concrete. One possibility consists in at least partially replacing part of the clinker with cement additives or adding an additive of fly ash to the clinker. One example of a cement additive corresponds to fly ash, which is a waste produced by coal-fired power stations. [0003] Certain countries have mandated reductions in heavy metal (especially mercury) emissions from power stations. For this purpose, activated carbon can be injected into the process to capture heavy metals and thus can be found in waste produced by power plants. Thus, activated carbon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02
CPCC04B2111/1093C04B28/02Y02W30/91C04B18/08C04B24/2688C04B2103/006
Inventor S·乔治斯E·维拉德A·雅凯L·巴尔塞洛A·德拉格拉夫
Owner LAFARGE SA
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