Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Microbial concrete with high impermeability and freeze thawing resistance and preparation method thereof

A microorganism and concrete technology, applied in the field of microbial concrete with high impermeability and freeze-thaw resistance and its preparation, can solve the problems of hard to find and repair concrete micro-cracks, human and material resources, etc., so as to avoid further deterioration, reduce self-weight, and increase mechanical properties. Effect

Pending Publication Date: 2022-01-14
山西晟科微生物建材科技有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of repair method consumes a lot of manpower and material resources, and it is difficult to find and repair some micro-cracks inside the concrete. It is imminent to explore new active repair methods

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A microbial concrete with high impermeability and freeze-thaw resistance is made of the following raw materials in parts by weight: 300 parts of Portland cement, 50 parts of silica fume, 500 parts of fine aggregate, 1000 parts of coarse aggregate, and 12 parts of water reducer 300 parts of water, 10 parts of modified expanded perlite, 20 parts of expanded pearl pumice.

[0034] The Portland cement is P42.5 ordinary Portland cement; the average particle size of silica fume is 0.1μm-0.5μm; the fine aggregate is natural river sand, and the natural river sand passes through a 5mm screen to remove impurities; the coarse aggregate is Natural stone, particle size is 3-20mm; water reducer is polycarboxylate water reducer; modified expanded perlite particle size is 30-50 mesh, mass water absorption is about 400%-450%, thermal conductivity is 0.03W / (m*k)-0.05W / (m*k); the particle size of expanded pearl pumice is 10mm-30mm.

[0035]The preparation method of modified expanded per...

Embodiment 2

[0045] A microbial concrete with high impermeability and freeze-thaw resistance is made of the following raw materials in parts by weight: 400 parts of Portland cement, 65 parts of silica fume, 450 parts of fine aggregate, 900 parts of coarse aggregate, and 10 parts of water reducer 250 parts of water, 5 parts of modified expanded perlite, and 50 parts of expanded pearl pumice.

[0046] The Portland cement is P42.5 ordinary Portland cement; the average particle size of silica fume is 0.1μm-0.5μm; the fine aggregate is natural river sand, and the natural river sand passes through a 5mm screen to remove impurities; the coarse aggregate is Natural stone, particle size is 3-20mm; water reducer is polycarboxylate water reducer; modified expanded perlite particle size is 30-50 mesh, mass water absorption is about 400%-450%, thermal conductivity is 0.03W / (m*k)-0.05W / (m*k); the particle size of expanded pearl pumice is 10mm-30mm.

[0047] The preparation method of modified expanded ...

Embodiment 3

[0057] A microbial concrete with high impermeability and freeze-thaw resistance is made of the following raw materials in parts by weight: 500 parts of Portland cement, 60 parts of fly ash, 650 parts of fine aggregate, 1250 parts of coarse aggregate, and water reducer 15 parts, 400 parts of water, 8 parts of modified expanded perlite, and 10 parts of expanded pearl pumice.

[0058] The Portland cement is P42.5 ordinary Portland cement; the fine aggregate is natural river sand, and the natural river sand passes through a 5mm screen to remove impurities; the coarse aggregate is natural stone, with a particle size of 3-20mm; The agent is polycarboxylate superplasticizer; the particle size of modified expanded perlite is 30-50 mesh, the mass water absorption rate is about 400%-450%, and the thermal conductivity is 0.03W / (m*k)-0.05W / (m *k); The particle size of expanded pearl pumice is 10mm-30mm.

[0059] The preparation method of modified expanded perlite is as follows:

[0060]...

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle diameteraaaaaaaaaa
particle size (mesh)aaaaaaaaaa
Login to View More

Abstract

The invention discloses microbial concrete with high permeability resistance and freeze thawing resistance and a preparation method thereof. The concrete is prepared from the following raw materials in parts by weight: 300 to 500 parts of Portland cement, 50 to 65 parts of silica fume or fly ash, 450 to 650 parts of fine aggregate, 900 to 1250 parts of coarse aggregate, 10 to 15 parts of a water reducing agent, 250 to 400 parts of water, 5 to 10 parts of modified expanded perlite and 10 to 50 parts of expanded pearl pumice. The microbial concrete disclosed by the invention has good impermeability and freeze thawing resistance, solves the problems that the impermeability of the concrete is reduced and the concrete is easy to crack and even frost heave under long-term freeze-thaw cycle, can be used for building construction, and can also be used for frost heave repair of the surfaces of buildings or other infrastructures.

Description

technical field [0001] The invention relates to the technical field of concrete materials, in particular to a microbial concrete with high impermeability and freeze-thaw resistance and a preparation method thereof. Background technique [0002] Concrete is the most widely used material in the construction field today, and its impermeability and freeze-thaw resistance have always been the focus of attention. In cities in cold and severe northern regions, seepage and frost heaving of concrete, especially some low-grade concrete, have caused great economic losses to people. During the curing process of concrete, a large number of capillary pores will be formed inside after the water is hydrated or evaporated by the cement; during the process of adding water and mixing, air will be trapped in it due to mechanical stirring, and pores will also be left in the concrete. Under the action of water penetration and freeze-thaw cycles, these pores will cause the surface to become loose...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/20C04B111/40C04B111/72
CPCC04B28/04C04B2111/00293C04B2111/20C04B2111/40C04B2111/72C04B18/146C04B14/06C04B14/02C04B14/185C04B2103/302C04B2103/0001C04B18/18C04B24/06C04B22/16C04B24/128C04B24/04C04B22/066
Inventor 李珠贾冠华
Owner 山西晟科微生物建材科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com