Curing method for high-volume fly ash concrete

A technology with a large amount of concrete, applied in the field of concrete curing, can solve the problems of slow heat transfer speed, large heat consumption, low thermal efficiency, etc., and achieve the effect of short curing period and low energy consumption

Active Publication Date: 2016-01-27
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, in view of the low early strength of high-volume fly ash concrete, steam curing is mainly used to improve the strength
However, steam curing is a common thermal c

Method used

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  • Curing method for high-volume fly ash concrete
  • Curing method for high-volume fly ash concrete
  • Curing method for high-volume fly ash concrete

Examples

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Comparison scheme
Effect test

Embodiment 1

[0017] A maintenance method for large-volume fly ash concrete, the steps are as follows:

[0018] (1) Put 500g of fly ash, 500g of Portland cement clinker, and 320g of water together into a slurry mixer and mix evenly, and put the mixed concrete into a mold made of PEEK material, and its specification is 25mm× 25mm×25mm (length×width×thickness), during the molding process, attention should be paid to vibrating and compacting;

[0019] (2) Put the formed concrete together with the mold into a standard curing room for curing under standard conditions (temperature 20±1°C, humidity ≥95%);

[0020] (3) 2 hours after the final setting of the concrete, cover it with a plastic film together with the mold;

[0021] (4) Put the covered concrete into a microwave oven, and carry out microwave curing according to the different curing periods shown in Table 1; among them, A, B, and C represent: A—heat for 10 seconds and stop for 2 minutes; B—heat for 10 seconds and stop for 2 minutes; 20s, s

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Abstract

The invention belongs to the technical field of concrete curing, and discloses a curing method for high-volume fly ash concrete. High-volume fly ash cement is uniformly stirred according to the specified water-binder ratio, the stirred concrete is loaded into a mold made of PEEK materials, and the molded concrete together with the mold is cured on the standard condition; the concrete together with the mold is covered with a plastic film1-2 h after final setting is performed on the concrete; the covered concrete is placed into a microwave oven, and microwave curing is performed according to the curing period of 'A*3+B*10+C*8'; after microwave curing is performed, the concrete is taken out, demolding is performed 3 h after the microwave curing is ended, the concrete is placed into a normal temperature chamber, and watering curing is performed for 3 d. When the same effect is achieved as steam heat curing, the method has the advantages of being short in curing period and low in energy consumption.

Description

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Claims

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Application Information

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Owner HENAN POLYTECHNIC UNIV
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