Freeze-thaw resisting cement and its production process

A production method and anti-freeze-thaw technology, applied in the field of anti-freeze-thaw cement and its production, can solve the problems of anti-freeze-thaw technology, building erosion and peeling, unsatisfactory effect, etc., to achieve self-leveling and uniformity Good performance, fast setting and hardening, good plasticity

Inactive Publication Date: 2007-08-29
CAOYUAN CEMENT XIZHUOZISHAN NEI MONGOL AUTONOMOUS REGION
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The building materials used in power plant cooling towers and water conservancy project construction have not been able to solve the freeze-thaw resistance technology well.
Domestic power plants, water conservancy projects, and bridge constructions mostly use high-strength cement, but the effect is not ideal. After 3-5 years of use, the buildings will be corroded and peeled off, and the maintenance will be large. Developed countries do not have special power plant cooling towers and water conservancy project building materials.

Method used

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  • Freeze-thaw resisting cement and its production process
  • Freeze-thaw resisting cement and its production process
  • Freeze-thaw resisting cement and its production process

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Embodiment Construction

[0032] The invention will be described in detail in combination with the company’s trial firing production:

[0033] This embodiment is carried out under the conditions of general cement production equipment. Except for the process measures described below, the processes not mentioned are carried out according to the ordinary cement production process, which will not be repeated in this example.

[0034] Selection of raw materials and fuels:

[0035] Lime-based raw materials: stable quality, high quality, less impurities, CaO content greater than 50%.

[0036] Clay material: high freeze-thaw resistance cement to C 3 The content of A is more stringent, requiring the alkali content of clay raw materials (K 2 O+Na 2 O) Less than 1.0%.

[0037] Iron raw materials, high-speed iron raw materials are required, Fe 2 O 3 The content is between 55.0%-62.0%. To produce high-resistance freeze-thaw building cement, the most important thing is to control AL in clinker 2 O 3 According to the for...

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Abstract

The present invention discloses one kind of freeze-thaw resisting cement and its production process. The material consists of clinker 90-92 wt%, limestone 4.5-6 wt%, and gypsum 4.2-5.0 wt%, and the clinker has KH=0.90+ / -0.02, n=1.80+ / -0.10 and p=0.90+ / -0.10. It has the mineral composition of: C3S<54.0 wt%, C2S>20.0 wt%, C3A<6.0 wt%, C4AF>14.0 wt%, and f-CaO less than 1.5 wt%. The freeze-thaw resisting cement has specific surface area over 350 sq m / Kg and fineness below 2.5 %, and after 250 times of freeze-thaw, it has 3-day breaking strength over 5.0 Mpa and compression strength over 25.0 Mpa, and 28-day breaking strength over 7.0 Mpa and compression strength over 50.0 Mpa. It has low C3A content, good freeze-thaw resisting performance, fast curing, high wear resistance and high permeation resistance.

Description

Technical field: [0001] The invention relates to cement and a production method thereof, in particular to a freeze-thaw-resistant cement and a production method thereof. Background technique: [0002] With the implementation of the Western Development Strategy, the "South-to-North Water Diversion", "West-East Gas Transmission", "West-East Electricity Transmission" and other projects have begun, the construction volume of domestic power and water conservancy projects has increased significantly, and the demand for high-performance freeze-thaw resistant cement The amount increases accordingly. The building materials used in power plant cooling towers and water conservancy projects have not been able to solve the freeze-thaw resistance technology well. Domestic power plants, water conservancy projects, and bridge construction mostly use high-strength cement, but the effect is not satisfactory. After 3-5 years of use, the buildings will corrode and spall, and the amount of repairs wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/00C04B7/36
Inventor 祁文明介武军赵洪坚岳二恩宋福志李军郭俊李永飞
Owner CAOYUAN CEMENT XIZHUOZISHAN NEI MONGOL AUTONOMOUS REGION
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