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A method for detecting water demand of fly ash

A detection method and fly ash technology, applied in measuring devices, instruments, scientific instruments, etc., can solve the problems of small expansion value of 130-140mm mortar, high operator requirements, and different water requirements, so as to save testing. Cost, overcoming industry bias, and detecting the effect of simple steps

Active Publication Date: 2019-08-16
CHONGQING SANSHENG IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] First of all, the 0.5-1.0mm grade medium sand used does not have the same product specifications as standard sand, and the ground materials vary greatly; There are multiple repetitions to meet the interval requirements, so the work efficiency is low and the requirements for operators are high
Thirdly, the fly ash with the same water demand ratio has different water demand in the actual use process, which cannot fully characterize the material properties

Method used

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  • A method for detecting water demand of fly ash

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Experimental program
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Effect test

Embodiment 1

[0018] principle

[0019] Fly ash will exhibit unique rheological properties after adding water, and its consistency will decrease as the amount of water increases. Therefore, the amount of water used under specific rheological properties can measure the water demand of the material itself.

[0020] equipment

[0021] Cement slurry mixer meets the requirements of JC / T 729.

[0022] Material

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Abstract

The invention discloses a detection method for water demand of fly ash. The detection method for the water demand of the fly ash, provided by the invention, comprises the following steps: adding water into a cement paste stirrer; weighing fly ash to be detected, adding the fly ash into the stirrer and stirring; after the fly ash forms balls, reducing a water adding amount; under a stirring state, continually and gradually adding water; when the fly ash has a remarkable petal shape in a paste stirring pot and the surface is glossy, stopping adding water; if fly ash petals collapse downward and finally form the paste, showing that the water amount is excessive; recording the water adding amount when the fly ash has the pedal shape and is glossy, namely the water demand of the fly ash. According to the detection method for the water demand of the fly ash, provided by the invention, the utilization of medium sand with the size grade of 0.5mm to 1.0mm is eliminated and the fly ash is directly used for testing; the detection method provided by the invention has the characteristics that the water demand is closer to accrual water demand of concrete prepared from the fly ash and a result is more linear.

Description

technical field [0001] The invention relates to a method for detecting building materials, in particular to a method for detecting water demand of fly ash. Background technique [0002] In the prior art, usually according to GBT1596-2005 "fly ash used in cement and concrete" national standard specification for the detection principle of fly ash water demand ratio, measure the fluidity of test mortar and comparison mortar, The water demand ratio of fly ash is determined by the ratio of water added when the fluidity of the two reaches 130-140mm, so as to measure the water demand of fly ash. [0003] First of all, the 0.5-1.0mm grade medium sand used does not have the same product specifications as standard sand, and the ground materials vary greatly; There are multiple repetitions to meet the interval requirements, so the work efficiency is low and the requirements for operators are high. Thirdly, the fly ash with the same water demand ratio has different water demand in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00
CPCG01N33/00G01N2033/0091
Inventor 潘先文刘洋刘吉
Owner CHONGQING SANSHENG IND CO LTD