Unlock instant, AI-driven research and patent intelligence for your innovation.

Low-grade large-fluidity concrete plastic micro-crack defect inhibitor and preparation method thereof

A large-flow, concrete technology, applied in the field of admixtures that inhibit the generation of micro-cracks in the plastic stage, and the field of concrete plastic micro-crack defect inhibitors, to achieve the effects of reducing the possibility of erosion, reducing penetrating cracks, and improving durability.

Inactive Publication Date: 2018-07-13
NANJING HYDRAULIC RES INST
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above defects are major hidden dangers of macroscopic cracks in the hardening process of this type of concrete
This targeted crack inhibitor product has not been reported at home and abroad

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
  • Low-grade large-fluidity concrete plastic micro-crack defect inhibitor and preparation method thereof
  • Low-grade large-fluidity concrete plastic micro-crack defect inhibitor and preparation method thereof
  • Low-grade large-fluidity concrete plastic micro-crack defect inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The plastic micro-crack defect inhibitor of low-grade high-fluidity concrete of the present embodiment, the weight components are: special plastic expansion agent for cement-based grouting material: 0.5%; cellulose ether: 3.2%; butanol: 6.0%; triethanolamine: 0.5%; Calcium formate: 89.8%, above-mentioned each component is accurately weighed by weight percentage, makes the present invention by the described technique of embodiment 7.

Embodiment 2

[0023] The plastic micro-crack defect inhibitor of low-grade high-fluidity concrete of the present embodiment, the weight components are: special plastic expansion agent for cement-based grouting material: 0.6%; Wenlun rubber: 1.5%; Polyethylene glycol: 8.0%; Sulfur Aluminate cement: 89.9%, the above-mentioned components are accurately weighed by weight percentage, and the present invention is prepared according to the process described in Example 7.

Embodiment 3

[0025] The plastic micro-crack defect inhibitor of low-grade high-fluidity concrete in this embodiment, the weight components are: special plastic expansion agent for cement-based grouting material: 0.8%; polyacrylamide: 2.5%; butanol: 6.0%; high alumina cement : 90.7%, the above-mentioned components are accurately weighed by weight percentage, and the present invention is obtained by the described technique of embodiment 7.

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
Login to View More

Abstract

The invention discloses a preparation method of a low-grade large-fluidity concrete plastic micro-crack defect inhibitor. The inhibitor is prepared from the following components by weight percent: 0.5-1.0% of a special plastic expansion agent for a cement-based grouting material, 1.5-4.0% of a water retaining agent, 5.0-10.0% of a shrinkage reducing agent and 85.0-91.5% of an early strength agent.The preparation method comprises the steps of sequentially adding the materials into a high-speed mixer, and evenly mixing. The low-grade large-fluidity concrete plastic micro-crack defect inhibitorprepared by the method can effectively prevent the plastic settlement and plastic shrinkage of low-grade large-fluidity concrete, improves the early restrained tensile stress of the concrete, can reduce surface cracks which are extended, penetrated and developed by microcracks by 60% or above during shrinkage process of the low-grade large-fluidity concrete, and can reduce penetrating cracks by 80% or above.

Description

technical field [0001] The invention belongs to the technical field of building materials and relates to a concrete plastic micro-crack defect inhibitor prepared by a conventional process, in particular to an admixture developed for low-grade high-fluidity concrete to suppress the generation of micro-cracks in the plastic stage. Background technique [0002] There are many reasons for the cracks in concrete, 80% of the cracks in concrete are caused by deformation (temperature, shrinkage, uneven settlement), and 20% of the cracks are caused by load. , 1 / 3 of the number of concrete deformation cracks occurred in the early stage. [0003] Currently, the technical measures to control cracks mainly include: shrinkage reduction agent, fiber crack resistance, fly ash shrinkage reduction, expansion agent compensation shrinkage, surface curing agent, internal curing technology and hydration heat control materials, etc. The generation and development of concrete cracks is a complex p...

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): C04B24/38C04B24/26C04B28/04
CPCC04B28/04C04B40/0039C04B2111/00146C04B2111/343C04B2201/50C04B2103/0068C04B24/383C04B24/02C04B24/122C04B24/04C04B24/32C04B7/32C04B24/2652C04B18/08C04B14/06C04B14/02C04B2103/302C04B22/002
Inventor 王冬徐志峰祝烨然唐修生陈国新温金保蔡明杜志芹刘荣崔征石明建
Owner NANJING HYDRAULIC RES INST