Accelerator

A kind of accelerator, the technology of curing accelerator, applied in the purpose of function, prepares the composition that comprises at least one kind of mineral binder, molded body, promotes the field of curing of mineral binder, can solve limited application field, expensive , Mortar and concrete processing time and final strength unfavorable

Active Publication Date: 2018-11-09
SIKA TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although the known accelerators are generally very effective, their general disadvantages are that they are expensive, have a limited field of application and sometimes have a very negative effect on the processing time and final strength of mortars and concrete

Method used

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  • Accelerator
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0096] 1. Materials and methods

[0097] 1.1. Substance

[0098] Examples The following materials were used:

[0099] Table 1: Substances used

[0100]

[0101]

[0102] Sodium, potassium and magnesium carbonates were obtained commercially in pure form (>97% purity) from various suppliers. These were each dissolved in water in the amounts given in Table 1 and used in the form of aqueous solutions.

[0103] 1.2 Mortar mixture

[0104] The mortar mixture M1 used had the dry composition described in Table 2.

[0105] Table 2: Dry Composition of Mortar Mixtures

[0106]

[0107] For mixing the mortar mixture, sand, limestone filler, cement and optionally calcium oxide (CaOx) were dry mixed in a Hobart-mixer at a temperature of 20° C. for 1 minute. Within 30 seconds, add mixing water (water / cement-value or w / z=0.4) in which polycarboxylate ether-plasticizer (PCE; 1% by weight based on cement) and optionally other substances (GPD, NaCt, KCt, MgCt), and then stir...

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PUM

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Abstract

The present invention relates to a hardening accelerator for mineral binder compositions, in particular for cementitious binder compositions, comprising at least one phosphoric acid ester of a polyvalent alcohol and at least one alkali metal carbonate.

Description

technical field [0001] The invention relates to curing accelerators for mineral binders, corresponding compositions comprising mineral binders and shaped bodies produced therefrom. The invention also relates to the use for promoting the curing of mineral binders and to a process for the preparation of compositions comprising at least one mineral binder. The present invention also relates to the use of selected substances in mineral binder compositions comprising magnesium carbonate for reducing the influence of magnesium carbonate on accelerator additives and for improving the action of accelerator additives. Background technique [0002] Cement production produces large amounts of climate-impacting CO 2 . To reduce CO 2 - Emissions, the cement in the binder composition may be partially replaced by latent hydraulic cement additives and / or pozzolanic cement additives such as fly ash, slag or silica dust. This additive is produced as a by-product in various industrial proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B40/00
CPCC04B40/0039C04B28/04C04B2103/14C04B24/32C04B24/003C04B24/02C04B22/10C04B22/064C04B14/28C04B14/06C04B28/02Y02W30/91C04B24/10C04B40/065
Inventor C·比格G·梅德尔F·沃巴赫尔
Owner SIKA TECH AG
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