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Hydraulic lime and preparation method thereof

A technology of hydraulic lime and carbide slag, which is applied in the field of building materials to achieve the effects of rational use of resources, low energy consumption, and good self-healing properties

Active Publication Date: 2020-06-30
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the domestic research on the production of hydraulic lime with calcium carbide slag industrial waste is blank

Method used

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  • Hydraulic lime and preparation method thereof

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preparation example Construction

[0018] One aspect of the present invention provides a method for preparing hydraulic lime, in an exemplary embodiment of the method for preparing hydraulic lime of the present invention, as figure 1 As shown, the preparation method may include:

[0019] Step S01, preparing raw materials.

[0020] The preparation of raw materials includes calcium carbide slag as the main raw material, and clinker is added according to a certain mass ratio. In order to make hydraulic lime meet its own performance requirements, such as strength, adhesion, water resistance, repairability, etc., the composition of the raw materials must meet the corresponding requirements. Therefore, the preparation of raw materials is particularly important to the preparation of products. The present invention adopts calcium carbide slag as the main raw material and is combined with clinker, which can well meet the composition requirements of hydraulic lime, saves the calcining process, and has a simple producti...

example 1

[0037] Configure hydraulic lime according to 50% of carbide slag and 50% of white cement clinker, and its preparation method includes:

[0038] 1) Carbide slag is dried;

[0039] 2) According to the mass ratio of 50% calcium carbide slag and 50% white cement clinker, batching is carried out;

[0040] 3) After grinding the raw materials for 2 hours, when the 0.2mm sieve residue does not exceed 5%, and the 0.09mm sieve residue does not exceed 15%, hydraulic lime is obtained.

example 2

[0042] Configure hydraulic lime with 75% calcium carbide slag and 25% white cement clinker. The preparation method includes:

[0043] 1) Carbide slag is dried;

[0044] 2) According to the mass ratio of 75% calcium carbide slag and 25% white cement clinker, batching is carried out;

[0045] 3) After grinding the raw materials for 2 hours, when the 0.2mm sieve residue does not exceed 5%, and the 0.09mm sieve residue does not exceed 15%, hydraulic lime is obtained.

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Abstract

The invention provides hydraulic lime and a preparation method thereof. The preparation method comprises the following steps: preparing raw materials, and grinding the prepared raw materials until thescreen residue with the particle size of 0.2 mm is not more than 5% and the screen residue with the particle size of 0.09 mm is not more than 15% to obtain hydraulic lime, wherein the prepared raw materials comprise, by mass, 50%-90% of carbide slag and the balance cement clinker, and the carbide slag comprises, by mass, 75%-95% of calcium oxide, 0%-10% of silicon dioxide, 0%-5% of aluminum oxideand no more than 3% of sulfur trioxide. The preparation method disclosed by the invention has the advantages of short process flow, simplicity in operation, low energy consumption, low production cost, suitability for large-scale production and the like; and the hydraulic lime can be widely applied to the aspects of cultural relic protection, ancient building repair, historical building repair and reinforcement and the like, and has the advantages of good flexibility and constructability, good viscosity and the like.

Description

technical field [0001] The invention belongs to the technical field of building materials, and more specifically relates to a hydraulic lime and a preparation method thereof. Background technique [0002] Hydraulic lime can be used as a building material, and its main characteristics are different from lime and cement. Compared with lime, hydraulic lime has fast setting speed, good cohesiveness, strong adhesion, high water resistance and high mechanical strength; compared with cement, it can make the wall breathable and keep breathing, which is beneficial to the exchange of water vapor , and has good frost resistance and alkali resistance, good flexibility, good machinability, and strong self-repair ability. Since the hardening rate of hydraulic lime is slower than that of cement, the early hydration heat release is lower, thereby avoiding the internal stress caused by rapid solidification, so that it has good toughness. [0003] In foreign countries, hydraulic lime can be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/34C04B7/36
CPCC04B7/34C04B7/36
Inventor 李军卢忠远罗凯牛云辉
Owner SOUTHWEAT UNIV OF SCI & TECH
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