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Additives for a hydraulic binder based on a belite-calcium-sulphoaluminate-ferrite clinker

A technology of sulfoaluminate and ferrite, applied in cement production, sustainable waste treatment, solid waste management, etc., can solve the problems of low hydraulic hardness of limestone, achieve the effect of reducing the amount of clinker and high long-term mechanical strength

Inactive Publication Date: 2017-08-22
HOLCIM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] However, limestone has the disadvantage of having lower hydraulicity and also slows down the change in mechanical strength of the BCSAF cement after setting

Method used

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  • Additives for a hydraulic binder based on a belite-calcium-sulphoaluminate-ferrite clinker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0211] Material:

[0212] Obtain described BCSAF clinker by limestone, kaolin, calcium sulfate, iron oxide, its chemical composition is given in the following table 1, and expressed with respect to the mass percent of total mass:

[0213] Table 1

[0214]

[0215] Preparation of BCSAF clinker:

[0216] Preparation of raw materials: The raw materials were previously milled individually to verify the following properties:

[0217] -0% refus at 200μm

[0218] - Up to 10% oversize at 100 μm.

[0219] Weighing, mixing and homogenization of raw materials: The raw meal according to step a) of the process of the invention is prepared. Weighing is carried out according to the proportions defined in Table 2 below and expressed in mass percent relative to the total mass of the raw meal:

[0220] Table 2

[0221] ％ limestone Kaolin Bauxite Anhydrite iron oxide BCSAF raw meal 61.36 24.80 3.35 5.47 5.02

[0222] The mixing of these components was ca...

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Abstract

The invention relates to additives for a hydraulic binder based on a belite-calcium-sulphoaluminate-ferrite clinker. A composition includes at least, in % expressed by mass relative to the total mass of the composition, from 0.01 to 3% of polycarboxylic acid or salts thereof, the polycarboxylic acid including 2 to 4 carboxyl groups per molecule; and from 97 to 99.99% of a Belite-Calcium-Sulphoaluminate-Ferrite clinker (BCSAF clinker).

Description

[0001] This application is a Chinese patent application with an application date of July 20, 2010, entitled "Additives for hydraulic binders based on belite-calcium-sulfoaluminate-ferrite clinker" Divisional application of No.201080036388.0. technical field [0002] The present invention relates to a composition comprising belite-calcium-sulfoaluminate-ferrite clinker (BCSAF clinker) and at least one polycarboxylic acid or a salt thereof, its use for the production of hydraulic binders , Use of a cement comprising said clinker and a polycarboxylic acid or a salt thereof for increasing the mechanical strength of a hydraulic binder. Background technique [0003] BCSAF clinkers are clinkers with low or no alite content, which is one of the mineralogical phases of conventional Portland-type clinkers. Alite is calcium trisilicate (Ca 3 SiO 5 ), whose traditional symbol is C 3 S. [0004] For the remainder of the specification of the present invention, unless expressly stated...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/345C04B28/06C04B28/04
CPCC04B7/3453C04B28/04C04B28/065C04B40/0039C04B2201/50C04B24/04C04B18/025C04B22/002C04B14/00C04B7/323C04B28/025C04B28/14C04B2111/00206C04B2111/00215Y02P40/10Y02W30/91C04B22/064C04B22/066C04B22/147C04B24/06C04B24/122C04B14/28C04B18/08C04B18/142
Inventor G·瓦伦塔E·加特内V·莫兰
Owner HOLCIM LTD
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