Anti-freezing pumping concrete and preparation method thereof

A technology for pumping concrete and concrete, applied in the field of concrete, can solve the problems of reducing the antifreeze performance of pumped concrete and reducing the air content of pumped concrete, and achieve the effects of low thermal expansion coefficient, improved antifreeze performance and improved stability

Active Publication Date: 2020-11-06
山东华爵混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some unburned carbon particles in the fly ash, and these unburned carbon particles will absorb the air-entraining agent and significantly reduce the air content of the pumped concrete, thereby reducing the antifreeze performance of the pumped concrete

Method used

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  • Anti-freezing pumping concrete and preparation method thereof
  • Anti-freezing pumping concrete and preparation method thereof
  • Anti-freezing pumping concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A preparation method for antifreeze pumped concrete, comprising the following steps:

[0051] Step 1, pretreatment: Weigh 50kg fly ash, 0.005kg sodium phenate, 0.01kg p-toluenesulfonate and 0.015kg sodium stearate, add 10% water in 150kg water and mix and stir to make a solution, place the solution in In the ultrasonic oscillator, set the temperature at 30°C-40°C, preferably 35°C, and the ultrasonic reaction time is 3min;

[0052]Step 2: Weigh 220kg of cement, 60kg of mineral powder, 870kg of sand, and 840kg of stones into the mixer, set the stirring speed to 35r / min, fully stir and mix until uniform, and obtain a dry mixture;

[0053] Step 3. Weigh the remaining water, 8.5kg pumping agent, 7.4kg antifreeze, 0.1kg triterpene saponin concrete air-entraining agent, 30kg nano-ceramic powder and 4kg natural rubber latex into the mixer, pretreat in step 1 The final solution is also put into the blender, set the stirring speed to 35r / min, and fully stir and mix with the dry ...

Embodiment 2- Embodiment 6

[0055] The difference between the following examples and Example 1 is that the weight of each raw material is different, see Table 1 for details:

[0056] Table 1

[0057]

Embodiment 4

[0092] Embodiment 4, comparative example 2, comparative example 3 are compared with comparative example 1 respectively, embodiment 4 has added sodium phenate, sodium p-toluenesulfonate and sodium stearate as carbon adsorbent, comparative example 2 has only added sodium phenate, Sodium p-toluenesulfonate was used as the carbon adsorbent, and in Comparative Example 3, only sodium stearate was added as the carbon adsorbent. From the test results, the total number of bubbles and the gas content of Example 4, Comparative Example 2 and Comparative Example 3 are all improved compared to the total number of bubbles and the gas content of Comparative Example 1, but the degree of improvement of Comparative Example 2 and Comparative Example 3 is higher than that of the embodiment. The degree of improvement in Example 4 is much smaller, reflecting the synergistic effect of sodium phenate, sodium p-toluenesulfonate and sodium stearate to reduce the inhibitory effect of fly ash on the air-en...

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Abstract

The invention discloses anti-freezing pumping concrete and a preparation method thereof. The anti-freezing pumping concrete comprises the following raw materials by weight: 220-260 parts of cement; 50-90 parts of fly ash; 60-100 parts of mineral powder; 870-970 parts of sand; 840-940 parts of stone; 150-190 parts of water; 8.5-9.5 parts of a pumping agent; 7.4-8.2 parts of an anti-freezing agent;0.1-0.14 part of an air entraining agent; and 0.03-0.05 part of a carbon adsorbent, which comprises 0.005-0.01 part of sodium phenolate, 0.01-0.018 part of sodium p-toluenesulfonate and 0.015-0.022 part of sodium stearate; the preparation method comprises the following steps of: conducting pretreatment: weighing the fly ash, the carbon adsorbent and 10% of water according to a stoichiometric ratio, performing mixing and stirring to prepare a solution, putting the solution into an ultrasonic oscillator, and setting the temperature at 30DEG C-40DEG C and controlling the ultrasonic reaction timeat 3min; weighing the raw materials according to the stoichiometric ratio, putting the raw materials into a stirrer, putting the pretreated solution into the stirrer, and fully stirring and mixing thesubstances uniformly. The anti-freezing pumping concrete can be used in the technical field of concrete, and has the advantages of reducing the inhibition effect of fly ash on the air entraining agent and improving the anti-freezing performance of the pumping concrete.

Description

technical field [0001] The invention relates to the field of concrete, more specifically, it relates to an antifreeze pumped concrete and a preparation method thereof. Background technique [0002] Marine pumping concrete projects in severe cold areas have been in harsh marine environments for a long time, and are extremely vulnerable to the harsh marine environment and reduce their service life. Therefore, it is necessary to improve the antifreeze performance of pumped concrete. [0003] In related technologies, adding fly ash to pump concrete can significantly improve the pumpability of concrete. After a certain amount of high-quality fly ash is added to pump concrete, it can not only replace part of the cement, but also because the fly ash particles The spherical shape has a ball effect, plays a lubricating role, and can also improve the fluidity, cohesion and water retention of the concrete mixture, thereby improving the pumpability of the pumped concrete. When the air...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/02C04B20/02C04B18/08C04B24/24C04B24/20C04B111/76
CPCC04B28/04C04B18/023C04B20/02C04B18/08C04B24/24C04B40/0039C04B2111/76C04B24/02C04B24/20C04B24/085C04B14/02C04B14/06C04B18/12C04B2103/304C04B2103/0068C04B40/0028C04B20/008Y02W30/91
Inventor 刘均平唐俊栋韩培毅李元民
Owner 山东华爵混凝土有限公司
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