Modified calcium oxide expansion agent for cement concrete

A technology of cement concrete and calcium oxide, which is applied in the field of building materials, can solve the problems of no improvement in hydration, achieve the effects of improving shrinkage compensation, reducing usage, and extending shelf life

Inactive Publication Date: 2015-06-10
JIANGSU SOBUTE NEW MATERIALS
View PDF4 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The weathering resistance of the expanded clinker prepared by this method is improved, but it does not improve the hydration in the plastic stage of concrete

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 calcium oxide expansion agent for cement concrete
  • Modified calcium oxide expansion agent for cement concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh the calcium oxide expansion agent and lauric acid with a mass ratio of 999:1, mix them evenly, and grind them in an electromagnetic vibrating mill for 1 min. The free calcium oxide (f-CaO) of the calcium oxide expansion agent is 60%. , the specific surface area is 100m 2 / kg, the modified calcium oxide expansion agent 1 for cement concrete is obtained after grinding.

[0024] In contrast, the unmodified calcium oxide expansion agent used in the present embodiment is marked as 1'.

Embodiment 2

[0026] Weigh the calcium oxide expansion agent and myristic acid with a mass ratio of 99:1, mix them evenly, and grind them in an electromagnetic vibrating mill for 5 minutes. The free calcium oxide (f-CaO) of the calcium oxide expansion agent is 70 %, the specific surface area is 200m 2 / kg, the modified calcium oxide expansion agent 2 for cement concrete is obtained after grinding.

[0027] In contrast, the unmodified calcium oxide expansion agent used in the present embodiment is marked as 2'.

Embodiment 3

[0029] Weigh the calcium oxide expansion agent and arachidic acid with a mass ratio of 95:5, mix them evenly, and grind them in a planetary ball mill for 10 min. The free calcium oxide (f-CaO) of the calcium oxide expansion agent is 80%, and the ratio Surface area is 400m 2 / kg, the modified calcium oxide expansion agent 3 for cement concrete is obtained after grinding.

[0030] In contrast, the unmodified calcium oxide expansion agent used in this embodiment is marked as 3'.

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
specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention provides a modified calcium oxide expansion agent for cement concrete and a preparation method of the modified calcium oxide expansion agent. The modified calcium oxide expansion agent for the cement concrete has the specific surface area of 100-600m<2> / kg and is prepared from long-chain fatty acid and a calcium oxide expansion agent, wherein the surface of the calcium oxide expansion agent is coated with the long-chain fatty acid, and the mass ratio of the calcium oxide expansion agent to the long-chain fatty acid is (90: 10) to (999: 1). According to the modified calcium oxide expansion agent for the cement concrete, the humidity resistance is improved, the hydration of a plastic stage of the cement concrete is reduced, the hardened expansion quantity of the concrete is increased, and the concrete cracking resistance of the calcium oxide expansion agent can be improved.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a modified calcium oxide expansion agent for cement concrete. Background technique [0002] As the most widely used building material in the world, cement concrete has many advantages such as cheap price and easy molding. With the improvement of current engineering quality requirements, the strength requirements of cement concrete are getting higher and higher. With the use of high-performance concrete admixtures, the water-binder ratio of cement concrete is getting lower and lower. While greatly improving the strength level of concrete , also increases the risk of concrete cracking. In order to solve the cracking problem of cement concrete, cement concrete expansion agent came into being. The main characteristic of expansion agent is that after it is mixed into cement concrete, its expansion performance can compensate the shrinkage of concrete during hardening and ...

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): C04B22/06
Inventor 程骏王瑞张守治陆安群姚婷李司晨
Owner JIANGSU SOBUTE NEW MATERIALS
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