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A three expansion sources concrete expansion agent and its preparation method

An expansion agent and concrete technology, applied in the field of concrete additives, can solve the problems of short expansion period, unfavorable long-term stability and disappearance of cement strength, etc.

Inactive Publication Date: 2016-08-17
FOSHAN HONGXING LION CONCRETE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The expansion rate of this expansion agent is relatively high, but the expansion period is short. After being used in conjunction with concrete, the expansion rate is high in the early stage, and the expansion effect will gradually weaken or even disappear in the later period, especially in arid areas, which is not conducive to Long-term stability of cement strength

Method used

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  • A three expansion sources concrete expansion agent and its preparation method
  • A three expansion sources concrete expansion agent and its preparation method
  • A three expansion sources concrete expansion agent and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] 30 parts by weight of calcium oxide, 20 parts by weight of calcium sulfate, 10 parts by weight of calcium sulfoaluminate and 6 parts by weight of magnesium oxide are jointly ground and then calcined at 1150°C-1200°C to form expanded clinker, and then three Ethanolamine, 100-120°C, mix well.

Embodiment 2

[0014] Other conditions are the same as in Example 1, except that calcium stearate is used instead of triethanolamine, and the obtained clinker is fully mixed with calcium stearate at 120-150° C. accordingly.

Embodiment 3

[0016] Other conditions were the same as in Example 1, except that the mixing of the clinker and triethanolamine was carried out at normal temperature.

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Abstract

The invention discloses a concrete expanding agent with triple expansion sources and a preparation method of the concrete expanding agent. The high-performance concrete expanding agent provided by the invention contains calcium oxide, calcium sulfate, calcium sulphoaluminate, magnesium oxide and surfactant. Expansion rate change of the expanding agent and shrinking percentage change of the cement have an adaptive trend, and therefore, after using the expanding agent, the concrete is stable in strength performance, and the performances of the cement or the concrete can be stable for a long time.

Description

technical field [0001] The invention belongs to the technical field of concrete additives, in particular to a high-performance concrete expansion agent and a preparation method thereof. Background technique [0002] Expansive agent is a kind of substance that is mixed into concrete to make concrete slightly expand. Its main purpose is to compensate the shrinkage of concrete caused by the interaction of other components of concrete, reduce stress cracking, and improve the strength of concrete. The main components of the early expansion agent were gypsum and calcium sulfate (including monocalcium sulfate, dicalcium sulfate and tricalcium sulfate). After a period of time, calcined kaolin, high alumina coal gangue, alunite, and anhydrous calcium sulfoaluminate were often used. Or the preparation of calcium aluminate clinker and gypsum has the problems of slow expansion rate and low expansion energy. Moreover, the production process control requirements of the expansion agent ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B22/14C04B24/42C04B24/12C04B22/06
Inventor 马清浩
Owner FOSHAN HONGXING LION CONCRETE CO LTD
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