Coating for concrete for maintenance and protection and its preparation and usage method

A technology for concrete and coatings, applied in the field of building materials, can solve the problems of only considering waterproof function, not considering the corrosiveness of sulfate to coating, and not being able to use concrete structure for early maintenance, etc., to prevent water loss, low cost, and preparation technology. simple effect

Inactive Publication Date: 2007-05-30
TONGJI UNIV
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Existing concrete protective coatings only have a certain protective function and cannot be used for early maintenance of concrete structures
Existing polymer-modified cement waterproof coatings only consider the waterproof function, and are generally formulated with ordinary cement, calcium carbonate fillers and polymer emulsions, without considering the aggressiveness of sulfate to the coating itself

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

[0025] This example uses fluoroaluminate cement as the hydraulic cementitious material. The main hydration products of fluoroaluminate cement are trisulfide hydrated calcium sulfoaluminate, hydrated alumina gel and hydrated calcium silicate, which have outstanding sulfate resistance. The filler is talc powder, and quartz powder can also be used. Since fluoroaluminate cement is a fast-setting and fast-setting cement, although the polymer emulsion has a certain retarding effect, if necessary, (0.2-0.3)% boric acid of cement quality can be added as a retarder.

[0026] The mass ratio of components A and B is A:B=1:1.

[0027] Formulation of component B in various embodiments of table 2

[0028] Material

Embodiment 2

[0030] This example uses sulfoaluminate cement as the hydraulic cementitious material. The main hydration products of sulfoaluminate cement are trisulfide-type hydrated calcium sulfoaluminate and monosulfur-type hydrated sulfoaluminate, hydrated alumina gel and hydrated calcium silicate gel. It has good resistance to sulfate corrosion.

[0031] The mass ratio of components A and B is A:B=1:0.8.

Embodiment 3

[0033] This example uses iron aluminate cement as the hydraulic cementitious material. Iron aluminate cement has good resistance to sulfuric acid. Using quartz powder and fine sand as fillers can make the paint more breathable.

[0034] The mass ratio of components A and B is A:B=1:1.6

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
glass transition temperatureaaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses an integral paint of sulfate-resistant cement, which consists of liquid component A and powder component B, wherein the liquid component A contains 100g polymer emulsion, 0.5-2g dispersant and 0.5-2g defoamer; the powder component B possesses 50-100g hydraulic material, 50-100g filler and 200-300g fine sand. The invention possesses superior nourishing action and protective property, which satisfies the protective need of concrete structure.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to concrete coatings. Background technique [0002] Now, there is a broad consensus that the chemical resistance of concrete itself is limited. Therefore, for concrete structures in corrosive environments, additional surface protection is necessary. Especially for concrete in a sulfate corrosion environment, in addition to ettringite and gypsum-type corrosion, there is also Taumasite-type corrosion, which is at low temperature (<10°C) and has silicic acid. Corrosion occurs in the presence of calcium, calcium carbonate, calcium sulfate, and water. The ordinary cement concrete currently used contains calcium silicate and calcium carbonate. Therefore, under the low temperature conditions in the sulfate environment, the tombstone type corrosion is inevitable. As far as the current technical level is concerned, preventing sulfate from penetrating into concrete is the main m...

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): C04B28/00C04B14/04C04B24/24C04B41/45
Inventor 钟世云薛明
Owner TONGJI 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