High performance expansible cement clinker expansion agent series prepared thereby

A technology of cement clinker and expansive cement, which is applied in the field of concrete expansive agents, can solve the problems of unsafe expansion, achieve fast expansion rate, inhibit carbonization, and improve the bearing capacity of single piles
CN101333083AInactive Publication Date: 2008-12-31CHINA BUILDING MATERIALS ACAD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA BUILDING MATERIALS ACAD
Publication Date
2008-12-31
Estimated Expiration
Not applicable · inactive patent

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Abstract

Disclosed are a high-performance expansion cement clinker, a manufacturing method of the cement clinker, a series concrete expansion agent and a manufacturing method of the concrete expansion agent. The high-performance expansion cement clinker is made as follows: firstly, 50-90 wt% of limestone, 1-20 wt% of bauxite, 5-30 wt% of gypsum and 1-5 wt% of iron powder are grinded together into raw meal, then the raw meal is calcined at 1250-1400 DEG C in a rotary kiln, a tunnel kiln or a roller kiln to get the cement clinker. The cement clinker is milled alone or in combination with sulfur calcium aluminate cement clinker, calcium aluminate cement clinker, anhydrite, calcined gangue, alunite, calcined kaolin and hydration heat inhibiting additives until the specific surface area reaches 200-400m2 / kg, so as to get the series concrete expansion agent. The high-performance expansion cement clinker disclosed in the invention is calcium hydroxide-hydrated calcium aluminate sulfate double-expansion source expansion clinker, which is fast in expansion rate and high in expansion efficiency and uses less bauxite of scarce resources; besides, the calcination temperature is low to avoid calcium oxide dead burning, so the preparation is safe and reliable.
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Description

technical field

[0001] The invention belongs to the field of building materials, and in particular relates to the preparation and production of a high-performance expansive cement clinker and a concrete expansion agent based on it. Background technique

[0002] There are generally two ways to manufacture concrete expansion agents at home and abroad:

[0003] One is to use special cement clinker (mainly sulphoaluminate cement clinker and calcium aluminate cement clinker, of which calcium aluminate cement clinker is also known as high alumina cement clinker, bauxite cement clinker) and anhydrite Grinding in a certain proportion, or adding part of lime, calcined alunite (aluminum sulfate clinker), raw alunite, calcined kaolin (aluminosilicate), high-alumina coal gangue (aluminosilicate), dickite And other auxiliary materials, the hydration product of this kind of expansion agent is calcium sulfoaluminate hydrate (ettringite), which is basically produced in China, such as UEA-I...

Claims

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