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Anti-erosion low calcium Portland cement and preparation method thereof

A calcium silicate, anti-corrosion technology, applied in the field of cement, can solve the problems of concrete engineering formwork demolition cycle and project progress, low early strength of cement, etc., to achieve good anti-corrosion performance, improve service life, dry shrinkage Effect

Active Publication Date: 2018-08-24
CHINA BUILDING MATERIALS ACAD
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Problems solved by technology

However, the C in this low-heat Portland cement clinker 2 The high S content leads to low early strength of cement, which has a great influence on the demolition cycle and project progress of concrete engineering.

Method used

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  • Anti-erosion low calcium Portland cement and preparation method thereof
  • Anti-erosion low calcium Portland cement and preparation method thereof
  • Anti-erosion low calcium Portland cement and preparation method thereof

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Embodiment Construction

[0024] In order to further elaborate the technical means and effects that the present invention adopts to achieve the intended purpose of the invention, below in conjunction with the preferred embodiments, the specific implementation methods and methods of the anti-corrosion low-calcium Portland cement and its preparation method proposed by the present invention will be described below. Efficacy, detailed as follows. In the following description, different "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features or characteristics of one or more embodiments may be combined in any suitable manner.

[0025] Embodiments of the present invention propose an anti-corrosion low-calcium Portland cement, including cement clinker and gypsum, wherein the weight ratio of cement clinker to gypsum is: 96.5:3.5-94.5:5.5; the cement clinker mineral Composed of (percentage by weight): C 3 S: 35.03%-49.51%, C 2 S: 25.13%-39.00%, C...

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Abstract

The invention discloses anti-erosion low calcium portland cement and a preparation method thereof. The anti-erosion low calcium portland cement comprises clinker and gypsum according to a weight ratio of 96.5: 3.5 to 94.5: 5.5. Minerals of the cement comprises, by weight, 35.03-49.51% of C3S, 25.13-39.00% of C2S, 0.21-8.84% of C3A, 8.2-19.2% of C4AF and 1.71-9.24% of MgO. The cement has good anti-erosion performances, can effectively prevent seawater erosion of concrete engineering, has small dry shrinkage and good anti-cracking ability, improves a service life of oceanographic engineering, and has high early strength. Compared with the existing low-heat portland cement, the anti-erosion low calcium portland cement is conducive to shortening of a concrete work form stripping period and processing progress.

Description

technical field [0001] The invention relates to cement, in particular to an anti-corrosion low-calcium Portland cement and a preparation method thereof. Background technique [0002] Marine concrete projects such as sea-crossing bridges, port terminals, island and reef construction, submarine tunnels, and offshore oil drilling platforms have developed rapidly in recent years. At present, there are as many as 10 sea-crossing bridges planned and under construction in my country. It is well known that seawater contains a large amount of corrosive ions such as chloride ions and sulfate radicals, which are easy to erode marine engineering concrete. Therefore, marine engineering concrete has higher requirements on the anti-corrosion performance of cement; The crack resistance puts forward higher requirements. [0003] Existing marine cement or cementitious materials for marine concrete are all prepared by adding cement and admixtures. Due to the fact that the mixed materials usu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/02C04B7/36
CPCC04B7/02C04B7/36
Inventor 姚燕马忠诚王晶文寨军刘云
Owner CHINA BUILDING MATERIALS ACAD
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