Nano-micron composite concrete powder early strength agent and preparation method thereof

An early-strength agent and composite technology, which is applied in the field of preparation of nano-micron composite concrete powder early-strength agent, can solve the problems of large surface energy, gel, and difficult to separate from each other, so as to improve the early strength and reduce the use of cost, the effect of increasing the reach

Inactive Publication Date: 2021-07-16
JIANGSU SOBUTE NEW MATERIALS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small particle size of nanoparticles, large surface energy, and easy adsorption and agglomeration, in order to effectively disperse, such products currently available in the domestic market are all in the form of suspensions. In order to maintain a stable state, the actual The content is very low, and a certain amount of dispersant is added to it. Even so, there is still a risk of sedimentation or gelation with prolonged storage or long transportation distances
In addition, due to the low solid content of the product, which brings inconvenience to transportation and high dosage, it is also difficult to...

Method used

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  • Nano-micron composite concrete powder early strength agent and preparation method thereof
  • Nano-micron composite concrete powder early strength agent and preparation method thereof
  • Nano-micron composite concrete powder early strength agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Mix and stir the fly ash and alkali solution for modification, then filter the mixture with suction, wash, dry, and pass through a 45 μm sieve after cooling; -511 super-early-strength admixture was spray-dried, the drying time was 10s, and it was ground in a planetary ball mill for 5 minutes; (3) The dry powder of fly ash and nano-crystal nucleus early-strength agent was put into Nara, Japan according to the mass ratio of 1:0.5 The powder early strength agent 1 was obtained by compound treatment in the HYB equipment manufactured by the Machinery Manufacturing Institute, the rotation speed was 10000r / min, and the treatment time was 5min.

Embodiment 2

[0027] (1) Mix and stir the fly ash and alkali solution and modify it with ultrasonic dispersion, then filter the mixture with suction, wash, dry, and pass through a 45 μm sieve after cooling; (2) Mix the commercially available nanocrystalline nucleus strong agent -511 super-early-strength admixture was spray-dried, the drying time was 10s, and it was ground in a planetary ball mill for 10 minutes; (3) The dry powder of fly ash and nano-crystal nucleus early-strength agent was put into Nara, Japan according to the mass ratio of 1:0.2 The powder early strength agent 2 was obtained by compound treatment in the HYB equipment manufactured by the Machinery Manufacturing Institute, the rotation speed was 8000r / min, and the treatment time was 6min.

Embodiment 3

[0029] (1) Mix and stir fly ash and alkali solution and react in microwave for modification, then filter the mixture with suction, wash, dry, and pass through a 45 μm sieve after cooling; (2) Mix commercially available nanocrystalline nuclei early strength agent -511 super-early-strength admixture was spray-dried, the drying time was 10s, and it was ground in a planetary ball mill for 10 minutes; (3) The dry powder of fly ash and nano-crystal nucleus early-strength agent was put into Nara, Japan according to the mass ratio of 1:0.1 The powder early strength agent 3 was obtained by compound treatment in the HYB equipment manufactured by the Machinery Manufacturing Institute, the rotation speed was 5000r / min, and the treatment time was 8min.

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Abstract

The invention relates to a nano-micron composite concrete powder early strength agent and a preparation method thereof. According to the designed and prepared nano-micron composite concrete powder early strength agent, the performance advantages of nano particles and micron particles are combined, the early strength agent is well dispersed in concrete by means of the form effect of fly ash particles, and the early strength effect of a nano crystal nucleus early strength agent is fully exerted; the defects that a nanocrystal nucleus early strength agent suspension system is inconvenient to transport and use, poor in stability and the like are overcome, the early strength of the concrete can be greatly improved, and the acceleration of the secondary hydration reaction of the fly ash is also beneficial to the increase of the later strength.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a preparation method of a nano-micron composite concrete powder early strength agent for improving the early strength of concrete. Background technique [0002] In winter construction, due to the drop in temperature, the development of concrete strength often slows down, which affects the construction progress, and even causes quality problems in serious cases. The rapidly developing concrete products industry also has an urgent need to improve the early strength of concrete. The strength development of concrete is closely related to the hydration rate of the main cementitious material cement. In order to improve the early strength, the existing technical methods mainly include increasing the fineness of cement, steam curing and adding early strength agents, etc., but there are different problems. The finer the cement fineness, the poorer the construction ...

Claims

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Application Information

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IPC IPC(8): C04B22/10C04B103/10
CPCC04B40/0039C04B2103/10C04B22/0006C04B22/00C04B22/10
Inventor 余鑫魏强于诚刘建忠洪锦祥张茜姜骞刘中心刘东峰
Owner JIANGSU SOBUTE NEW MATERIALS
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