Modified ecological cementing nano-material and preparation method therefor

A nano-modified and gelled material technology, applied in the field of building materials, can solve the problems of micro-nano silica fume loss, surface activity decline, thermodynamic instability, etc., to optimize particle gradation, improve compactness, and improve later strength Effect

Active Publication Date: 2016-07-20
SOUTHEAST UNIV
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the extremely fine particles and high surface energy of silica fume, when it exists in the form of a single particle, it is in a thermodynamically unstable state, and the particles will automatically attract each other to approach and transform into a stable state. Agglomer

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Modified ecological cementing nano-material and preparation method therefor
  • Modified ecological cementing nano-material and preparation method therefor
  • Modified ecological cementing nano-material and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An ecological nano-modified cementitious material, by weight, the water-cement ratio is 0.15, other components and mass percentages are as follows: 35% of cement, 3% of ecological nano-materials, 20% of limestone powder, high-quality grade I Low calcium fly ash is 40%, polycarboxylate superplasticizer is 2%.

[0026] Surface potential diagrams of silica fume particles before and after modification figure 1 As shown, the picture shows that the potential of the modified silica fume particles is converted into a positive potential; the microscopic morphology comparison of the silica fume particles before and after modification combined with the water reducer is shown in figure 2 As shown, the picture shows that the dispersion of silica fume after modification is significantly improved; the microscopic morphology of the hardened ecological nano-modified gel material and the corresponding reference sample image 3 As shown in the picture, the surface of silica fume in the ...

Embodiment 2

[0028] An ecological nano-modified cementitious material, by weight, the water-cement ratio is 0.20, and other components and mass percentages are as follows: 38.5% of cement, 5% of ecological nano-materials, 17% of limestone powder, high-quality grade I Low-calcium fly ash is 38%, and high-efficiency water reducer is 1.5%.

Embodiment 3

[0030] An ecological nano-modified cementitious material, by weight, the water-cement ratio is 0.25, other components and mass percentages are as follows: 42% of cement, 7% of ecological nano-materials, 15% of limestone powder, high-quality grade I Low-calcium fly ash is 35%, and high-efficiency water reducer is 1.0%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a modified ecological cementing nano-material and a preparation method therefor. According to the modified ecological cementing nano-material, the water cement ratio is 0.15 to 0.35; and the modified ecological cementing nano-material contains other ingredients in percentage by mass: 35% to 55% of cement, 3% to 11% of modified silica fume, 10% to 20% of limestone flour, 30% to 40% of high-quality I-class low-calcium fly ash and 0.2% to 2% of efficient water reducing agent. Through carrying out predispersing treatment on the silica fume of the ecological nano-material, the dispersity of the ecological nano-material in a cement-based material is greatly improved, so that the micro-aggregate effect, filler effect and volcanic ash effect of the ecological nano-material are more sufficiently exerted. By adding the high-quality limestone flour, the grain size distribution is further optimized, the cohesiveness of cementing material blended slurry is effectively improved, the compactness of a hardened cementing material is improved, and the microstructure of the cementing material is improved. Meanwhile, by adding the fly ash, the fluidity and later strength of cement slurry are improved, and the microstructure of the cementing material is improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a preparation method of an ecological nano-modified gelling material. Background technique [0002] In the research on the modification of cement-based materials, mineral admixtures or ultra-fine powders with different particle sizes are often used to optimize the particle gradation of cement-based materials in order to form the most compact particle packing, thereby improving Harden the microstructure of cement-based materials, and then improve the physical and mechanical properties and durability of cement. Commonly used admixtures such as silica fume, fly ash, ground mineral powder, ground steel slag, limestone powder, etc. [0003] Silica fume is an ecological nanomaterial with micro-nano particles. It has good pozzolanic effect and particle filling effect, which can significantly improve the internal pore structure and compactness of cement-based materials, and si...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C04B28/04C04B20/10
CPCC04B20/1066C04B28/04C04B2111/00008C04B2201/50C04B18/146C04B14/28C04B18/08C04B2103/302
Inventor 郭丽萍雷东移曹园章
Owner SOUTHEAST UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap