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Autoclave curing process of fiber cement board

A fiber cement board, autoclaved curing technology, applied in the direction of manufacturing tools, ceramic molding machines, etc., to achieve the effect of improving the production pass rate, shortening the curing process, and reducing the brittleness coefficient

Active Publication Date: 2018-10-16
BEIJING NEW BUILDING MATERIALS PLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems described above

Method used

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  • Autoclave curing process of fiber cement board

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1: autoclaved curing process 1 of fiber cement board

[0051] Specifically include the following steps:

[0052] (1) Under the pressure of 0 Pa, within 66 minutes, the autoclave temperature was raised from 0°C to 100°C.

[0053] (2) Within 44min, first raise the autoclave temperature from 100°C to 130°C, and at the same time raise the autoclave pressure from 0Pa to 0.27MPa, and then continue to increase the autoclave temperature to 161°C within 28min, while increasing Autoclaved pressure to 0.63MPa.

[0054] (3) Within 9 hours, keep 161°C and 0.63MPa for autoclaving.

[0055] (4) Within 67 minutes, first lower the temperature from 161°C to 130°C, and at the same time reduce the pressure from 0.63MPa to 0.27MPa, and then continue to reduce the temperature to 100°C within 60 minutes, and reduce the autoclaved pressure to 0Pa at the same time.

Embodiment 2

[0056] Embodiment 2: autoclaved curing process 1 of fiber cement board

[0057] (1) Under the pressure of 0 Pa, within 55 minutes, the autoclave temperature was raised from 0°C to 100°C.

[0058] (2) Within 35 minutes, first raise the autoclave temperature from 100°C to 130°C, and at the same time raise the autoclave pressure from 0Pa to 0.30MPa, and then continue to increase the autoclave temperature to 170°C within 30 minutes, while increasing Autoclaved pressure to 0.70MPa.

[0059] (3) Within 9 hours, keep 170°C and 0.70MPa for autoclaving.

[0060] (4) Within 70 minutes, first lower the temperature from 170°C to 135°C, and at the same time reduce the pressure from 0.70MPa to 0.25MPa, and then continue to reduce the temperature to 100°C within 65 minutes, while reducing the autoclaved pressure to 0Pa.

[0061] In summary, the beneficial effects of the present invention are:

[0062] 1. Through the method of autoclave curing, on the premise of ensuring the strength of th...

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Abstract

The invention discloses an autoclave curing process of a fiber cement board. The process includes the following steps: increasing autoclave temperature from 0 DEG C to 100 DEG C under the pressure of0 Pa; during a first period, simultaneously increasing the autoclave temperature and autoclave pressure twice, increasing the autoclave temperature from 100 DEG C to first autoclave temperature, and increasing the autoclave pressure from 0 Pa to first autoclave pressure; during a second period, keeping the first autoclave temperature and the first autoclave pressure for autoclave; during a third period, simultaneously reducing the autoclave temperature and the autoclave pressure twice, recovering the autoclave temperature to 100 DEG C, and recovering the autoclave pressure to 0 Pa. The beneficial effects of the process are that the temperature is increased / reduced according to time nodes, and the autoclave temperature and the autoclave pressure at each time node are strictly controlled soas to make the autoclave temperature and the autoclave pressure match each other, thereby reducing the brittleness coefficient of cement, reducing the probability of crack of the cement board, and greatly increasing the production qualified rate of the fiber cement board.

Description

technical field [0001] The invention relates to an autoclave curing process for a fiber cement board. Background technique [0002] Fiber cement exterior wall siding is a new type of green building energy-saving material, which is widely used in the facade of building exterior walls. As an exterior wall siding, the requirements for the wind pressure resistance of the board are high, so the shipped board must meet the requirements. The strength of cement products is determined by the degree of hydration reaction of cement. The longer the reaction time, the higher the strength. Therefore, after the wet embryo of the cement exterior wall hanging board is made, it can be shipped after 28 days of natural curing, which greatly affects the production. delivery process. [0003] At present, some factories promote the hydration reaction of cement through autoclave high-temperature steam curing, which greatly shortens the delivery date and improves production efficiency. However, du...

Claims

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Application Information

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IPC IPC(8): B28B11/24
Inventor 梁宝伟
Owner BEIJING NEW BUILDING MATERIALS PLC