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A kind of Portland cement with high early strength and high corrosion resistance and preparation method thereof

A technology of portland cement and calcium silicate, which is applied in the field of cement production and building materials, can solve the problems of weak resistance to deterioration of cement-based materials, deterioration of engineering structures, and increased construction difficulty, and achieve strong chloride ion curing ability, Improve service life and shorten maintenance time

Active Publication Date: 2018-06-08
WUHAN UNIV OF TECH
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0006] To sum up, a large number of literature surveys and patents have found that research at home and abroad mainly focuses on improving the durability of the project by adding mineral admixtures, improving the quality of concrete production, and improving the construction process. Insufficient, the anti-deterioration ability of cement-based materials in complex marine environments is still weak, especially unable to meet the engineering construction requirements under complex working conditions in the open sea. The requirements of high early strength and fast construction are contrary
Aiming at the lack of early strength of cement, high-iron aluminate cement, Q-phase aluminate cement, sulphoaluminate cement, etc. have been developed in China. building requirements
In order to completely solve the problem of premature deterioration of engineering structures in complex marine environments, designing and producing a new type of Portland cement with low cost, high early strength, strong erosion resistance and good erosion resistance is the key to achieve this goal

Method used

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  • A kind of Portland cement with high early strength and high corrosion resistance and preparation method thereof

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Effect test

Embodiment 1

[0030] A high-early-strength, high-corrosion-resistant Portland cement is prepared from high-iron and low-calcium cement clinker mineral components, auxiliary functional components, auxiliary gelling components, and industrial gypsum. The above-mentioned components are : 80% high-iron and low-calcium cement clinker mineral components, 5% auxiliary functional components, 10% auxiliary gelling components, and 5% industrial gypsum (produced by separate grinding, joint mixing and grinding, etc.).

[0031] The auxiliary function component is layered magnesium aluminum double metal hydroxide. The auxiliary gelling component is slag powder and fly ash, the slag powder and fly ash are mixed at a mass ratio of 1:1, and the specific surface area is 450m 2 / kg. The industrial gypsum is desulfurized gypsum.

[0032] The mineral components of the high-iron and low-calcium cement clinker are mainly prepared from high-iron and low-calcium Portland cement clinker and high-iron and low-calci...

Embodiment 2

[0042] A high-early-strength, high-corrosion-resistant Portland cement is prepared from high-iron and low-calcium cement clinker mineral components, auxiliary functional components, auxiliary gelling components, and industrial gypsum. The above-mentioned components are : High iron and low calcium cement clinker mineral components 77%, auxiliary functional components 3%, auxiliary gelling components 15%, industrial gypsum 5% (produced by separate grinding, joint mixing grinding and other processes).

[0043] The auxiliary function component is layered magnesium-iron double metal hydroxide. The auxiliary gelling component is slag fine powder and fly ash, the slag fine powder and fly ash are mixed at a mass ratio of 1:1, and the specific surface area is not less than 500m 2 / kg. The industrial gypsum used is desulfurized gypsum.

[0044] The mineral components of the high-iron and low-calcium cement clinker are mainly prepared from high-iron and low-calcium Portland cement clin...

Embodiment 3

[0056]A high-early-strength, high-corrosion-resistant Portland cement is prepared from high-iron and low-calcium cement clinker mineral components, auxiliary functional components, auxiliary gelling components, and industrial gypsum. The above-mentioned components are : High iron and low calcium cement clinker mineral component 60%, auxiliary functional component 10%, auxiliary gelling component 25%, industrial gypsum 5% (produced by separate grinding, joint mixing grinding and other processes).

[0057] The auxiliary function component is layered magnesium-iron double metal hydroxide. The auxiliary gelling component is silica fume and slag micropowder, the mass ratio of silica fume and slag micropowder is 1:1, and its specific surface area is not less than 1000m 2 / kg. The industrial gypsum is a mass ratio mixture of salt gypsum and desulfurized gypsum.

[0058] The mineral components of the high-iron and low-calcium cement clinker are mainly prepared from high-iron and low...

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Abstract

Belonging to the field of cement production and also relating to the field of building materials, the invention provides a high early strength and high corrosion resistant Portland cement and a preparation method thereof. The high early strength and high corrosion resistant Portland cement is mainly applied to engineering projects in complex marine environments and the west harsh environments. The high early strength and high corrosion resistant Portland cement is characterized by containing, by weight percentage, 60%-90% of a high iron and low calcium cement clinker mineral component, 2%-10% of an auxiliary functional component, 5%-25% of an auxiliary cementitious component, and 3%-7% of industrial gypsum. The high iron and low calcium cement clinker mineral component is mainly prepared from high iron and low calcium Portland cement clinker and high iron and low calcium Q phase cement clinker in a mass ratio of 5-15:1. The cement not only has strong seawater erosion resistance and high early strength, but also has the characteristics of low shrinkage and low hydration heat.

Description

technical field [0001] The invention relates to a high-early-strength, high-corrosion Portland cement and a preparation method thereof, belonging to the field of cement production, mainly used in engineering projects in complex marine environments and harsh western environments, and also relates to the field of building materials. Background technique [0002] Portland cement is the basic raw material of my country's construction industry. With the implementation of my country's national marine strategy and the "Belt and Road" strategy, a new upsurge in infrastructure construction in my country's complex near and far sea environments will be set off. Portland cement-based materials are used in ocean waves, tides, dry-wet cycles, salt, high temperature / Cracking, durability degradation and other degradation phenomena in complex environments such as freezing and thawing are very serious. According to a survey by the Ministry of Housing and Urban-Rural Development, the service l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/26C04B7/36C04B7/04
CPCC04B7/04C04B7/26C04B7/36Y02P40/10Y02P40/121
Inventor 王发洲穆元冬申培亮黄啸何永佳刘云鹏
Owner WUHAN UNIV OF TECH
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