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Comprehensive constant-temperature steam curing method

A technology of steam curing and constant temperature, which is applied in the direction of ceramic forming machines and manufacturing tools, which can solve the problems of long steam curing cycle, reduce heat loss and avoid uneven internal stress

Inactive Publication Date: 2021-02-09
CHINA MCC17 GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Aiming at the deficiencies of the prior art, the present invention provides a comprehensive constant temperature steam curing method, which solves the problem of long steam curing period of precast concrete parts in areas with high altitude and high temperature difference

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Effect test

Embodiment 1

[0055]Embodiment 1: Adopt the method of the present invention to carry out maintenance in winter at high altitude.

[0056] Step 1: Put the concrete concrete into a sealed inflatable box with steam to start curing;

[0057] Step 2: Stand still in an environment of 15°C for 6 hours (when the temperature in the box is lower than 10°C, fill it with steam and heat it to 15°C);

[0058] Step 3: After standing still, increase the amount of steam to control the heating rate to 10°C / h and raise the temperature to 60°C for 48 hours at constant temperature;

[0059] Step 4: After 48 hours of constant temperature curing, check whether the strength of the concrete reaches 85% of the design strength, and if it reaches 85%, gradually lower the temperature, control the cooling rate to 10°C / h and end the curing when the temperature difference between the inside and outside of the inflatable box is less than 20°C ; If it does not reach 85% of the design strength, for every 1% less than the de...

Embodiment 2

[0060] Embodiment 2: Adopt the method of the present invention to carry out maintenance in summer at high altitude.

[0061] Step 1: Put the concrete concrete into a sealed inflatable box with steam to start curing;

[0062] Step 2: Stand still in an environment of 15°C for 6 hours (when the temperature in the box is lower than 10°C, fill it with steam and heat it to 15°C);

[0063] Step 3: After standing still, increase the amount of steam to control the heating rate to 10°C / h and raise the temperature to 60°C for 48 hours at constant temperature;

[0064] Step 4: After 48 hours of constant temperature curing, check whether the strength of the concrete reaches 85% of the design strength, and if it reaches 85%, gradually lower the temperature, control the cooling rate to 10°C / h and end the curing when the temperature difference between the inside and outside of the inflatable box is less than 20°C ; If it does not reach 85% of the design strength, for every 1% less than the d...

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Abstract

The invention discloses a comprehensive constant-temperature steam curing method, and relates to the technical field of concrete curing. The comprehensive constant-temperature steam curing method comprises a standing stage, a heating stage and a constant-temperature curing stage. According to the comprehensive constant-temperature steam curing method, the standing stage of 10-15 DEG C is added inthe improvement of the curing process, pores in concrete can be refilled with water seals provided by steam in the stage, and the situation that the strength after the constant-temperature curing stage is reduced due to uneven internal stress caused by existing of air in pores of the concrete during direct heating is avoided; and a manner that a sealed inflatable box body is adopted for steam curing is adopted, so that the problem that heat in steam curing is easy to dissipate is greatly reduced, and particularly, the method has a more remarkable effect in high-altitude and high-temperature-difference areas.

Description

technical field [0001] The invention relates to the technical field of concrete curing, in particular to a comprehensive constant temperature steam curing method. Background technique [0002] Prefabricated beams are prefabricated in factories, and then transported to the construction site to be installed and fixed according to the design requirements. Compared with cast-in-place beams, prefabricated beams are prepared in advance in the beam factory and then transported to the site for installation. This not only reduces the on-site construction labor by 80%, but also greatly reduces the labor intensity of on-site workers and ensures the safety of construction workers. While ensuring safety and quality, it also significantly improves ergonomics. Effectively avoid dust, mud, light, noise and other pollution on site, and reduce the impact on the surrounding environment and citizens' lives. [0003] In the later stage of the preparation process of prefabricated beams, the pre...

Claims

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Application Information

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IPC IPC(8): B28B11/24
CPCB28B11/245
Inventor 崔博
Owner CHINA MCC17 GRP
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