Modified high belite cement and method for improving early strength of high belite cement

An early strength, belite technology, applied in the field of building materials, can solve the problems of high production cost, complex process steps, difficult to popularize, etc., to accelerate the hydration rate, broaden the scope of application, and be easy to promote.

Active Publication Date: 2017-07-21
宁夏青铜峡水泥股份有限公司
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Problems solved by technology

[0005] Chinese patent document CN 104150802 A discloses a method for synthesizing crystal nuclei to promote the hydration process of high belite cement. First, mix slaked lime and diatomaceous earth and place them in an autoclave to synthesize C-S-H crystal nuclei. Evenly mixed into high belite cement after grinding, the process steps are complicated, the production cost is high, and it is difficult to popularize; Chinese patent document CN103922627 A discloses a method for improving the gelling performance of high belite cement clinker method, this method is to add barium sulfate and strontium sulfate to this kind of cement raw meal, there are many kinds of raw materials, the price is high, and its production cost remains high

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  • Modified high belite cement and method for improving early strength of high belite cement

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Experimental program
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Effect test

Embodiment 1

[0023] A modified high belite cement, the preparation method is as follows:

[0024] Take In 2 o 3 (nano-indium oxide) 0.2 gram (the particle diameter of described nano-indium oxide is 30~70nm), 99.8 grams of high belite cement (produced by Anyang Zhonglian Cement Co., Ltd.), dry mix uniformly in the mixer, get final product A modified high belite cement with high early strength is obtained.

[0025] The 3-day compressive and flexural strengths were tested according to the method and standard of the comparative example, and the specific experimental data are shown in Table 1.

Embodiment 2

[0027] Take In 2 o 3 (nano-indium oxide) 0.5 gram (the particle diameter of described nano-indium oxide is 30~70nm), 99.5 grams of high belite cement (produced by Anyang Zhonglian Cement Co., Ltd.), dry mix uniformly in the mixer, get final product A modified high belite cement with high early strength is obtained.

[0028] The 3-day compressive and flexural strengths were tested according to the method and standard of the comparative example, and the specific experimental data are shown in Table 1.

Embodiment 3

[0030] Take In 2 o 3 (nano-indium oxide) 1.0 gram (the particle diameter of described nano-indium oxide is 30~70nm), 99.0 grams of high belite cement (produced by Anyang Zhonglian Cement Co., Ltd.), dry mix uniformly in the mixer, get final product A modified high belite cement with high early strength is obtained.

[0031] The 3-day compressive and flexural strengths were tested according to the method and standard of the comparative example, and the specific experimental data are shown in Table 1.

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Abstract

The invention relates to a modified high belite cement and a method for improving the early strength of the high belite cement, aiming at solving the technical problem of low early strength of the existing high belite cement. The present invention is to add nano indium oxide to high belite cement according to the mass ratio of high belite cement:nano indium oxide=9~4999:1 and mix evenly, the added nano indium oxide can excite C 2 The activity of S in the early stage can accelerate the hydration rate, generate more gels, regulate the crystal form of hydration products, and improve the early strength of high belite cement. The invention not only effectively solves the problem of high energy consumption in the cement industry, but also provides a simple and easy method for improving the early strength of high belite cement, which has low production cost and is easy to popularize.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a method for modifying high belite cement and improving the early strength of high belite cement. Background technique [0002] Well known to those skilled in the art, in the form of Alite (C 3 Ordinary Portland cement clinker with S) as the dominant mineral has a relatively high firing temperature, generally around 1450°C. Without considering the heat loss, the energy consumption in the cement clinker firing process mainly comes from two aspects: one is the high temperature formation of clinker minerals; the other is the decomposition of limestone in the raw meal. It is estimated that the energy consumption of limestone decomposition accounts for about 46% of the theoretical energy consumption of clinker. Obviously, the high energy consumption in the production process of ordinary Portland cement is caused by the high calcium mineral composition. In addition, the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B22/06
Inventor 朱建平尹海滨冯春花侯欢欢管学茂李东旭
Owner 宁夏青铜峡水泥股份有限公司
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