Cement mortar for constructional engineering

A cement mortar and construction engineering technology, applied in the field of construction engineering materials, can solve the problems of peeling, bulging and surface cracking of the plastering layer, and achieve the effect of reducing the drying shrinkage value

Inactive Publication Date: 2011-06-29
NANJING EFFUL
View PDF3 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When such plastering mortar is used on new wall materials, surface cracking and

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
  • Cement mortar for constructional engineering
  • Cement mortar for constructional engineering

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

The cement mortar for construction projects of the present invention is in addition to the water-retaining thickener, the spherical metal aluminum produced by the aerosol method, the UEA expansion agent and the internal curing agent are mixed into the cement mortar. The principle of aluminum powder expansion is like this, that is, metal aluminum undergoes substitution reaction with H2O under alkaline (Ca(OH)2) conditions to produce hydrogen. The chemical reaction formula is as follows:

2Al+3Ca(OH)2+6→C3Al2·6H2O+3H2↑

Because the aluminum powder particles are small and dispersed, a large number of small and uniform bubbles are formed in the mortar, which expands the volume of the mortar in a plastic state.

At the same time, the sulfoaluminate expansion agent hydrates in the cement mortar to form needle-like crystals called ettringite and expands. The formation of this kind of ettringite requires a lot of water, and 32 moles of water is used to generate 1 mole of ettringite. The...

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 discloses a cement mortar for constructional engineering. The cement mortar comprises a cement, yellow ground, a water-retaining and thickening agent, a plastic swelling agent, a concrete swelling agent and an internal curing agent. Because the plastic swelling agent forms a large amount of fine and uniform bubbles in the mortar, the plastic mortar swells; after the internal curing agent is mixed, innumberable mini-impounding reservoirs are built in the cement mortar; and when the mortar is in lack of water, the water in the internal curing agent can be slowly released so as to ensure the concrete and the swelling agent to continuously hydrate until the water is used up. Thus, long hydration time is provided for the swelling agent, and more swell crystal ettringites are generated, thereby reducing the dry shrinkage value of the cement mortar.

Description

A kind of cement mortar for construction engineering technical field The invention relates to a construction engineering material, in particular to a cement mortar for construction engineering with early plastic expansion properties and a small later drying shrinkage value. Background technique Cement plastering mortar is an indispensable engineering material for building walls. After years of innovation in wall materials, major successes have been achieved. The production and use of clay bricks have been restricted nationwide, and a large number of new wall materials have emerged, such as autoclaved aerated concrete blocks, small concrete hollow blocks, and various lightweight slats. These wall materials have different properties and put forward higher requirements for masonry mortar. For example, the water absorption rate of the autoclaved aerated concrete block is very high, and the water in the masonry mortar is quickly absorbed, and the mortar shrinks greatly. Howev...

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): C04B38/02C04B28/00
CPCC04B28/02C04B18/02
Inventor 唐绍林汤淑平万建东肖启明徐红英刘丽娟王彦梅唐修仁
Owner NANJING EFFUL
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