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

A functional aggregate used to improve the crack resistance of concrete

A concrete and anti-cracking technology, which is applied in the field of functional aggregates to improve the cracking resistance of concrete, can solve the problems that the driving force of shrinkage and cracking cannot be controlled at the same time, and reduce the driving force of shrinkage and cracking, so as to achieve low comprehensive anti-cracking cost and reduce cracking risk, the effect of improving crack resistance

Active Publication Date: 2020-11-17
JIANGSU SOBUTE NEW MATERIALS
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problem that the driving force of shrinkage and cracking or its own structural resistance cannot be simultaneously controlled in the prior art, the present invention provides a functional aggregate for improving the crack resistance of concrete. The functional aggregate for improving the crack resistance of concrete can realize Regulating the internal humidity of concrete means reducing the driving force of shrinkage and cracking. At the same time, it can also increase the degree of cement hydration, strengthen the transition zone between the aggregate and cement stone interface, and improve the self-resistance of the concrete structure, thereby achieving the purpose of improving the crack resistance 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
  • A functional aggregate used to improve the crack resistance of concrete
  • A functional aggregate used to improve the crack resistance of concrete
  • A functional aggregate used to improve the crack resistance of concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Mix tap water and ethanol solution at a volume of 95:5 to prepare 20kg of solvent, adjust the pH value of the solvent to about 4.0 by slowly adding acetic acid dropwise, then slowly add 20g of KH570 dropwise, stir until the solution is uniform and transparent, and prepare the mass concentration 0.1% coupling agent solution. Select shale light and fine aggregates with a particle size of 0-5mm, and its dry apparent density is 1410kg / m 3 , 24h water absorption rate is 11.9%. Weigh 8kg of the light aggregate and place it in the silane coupling agent solution, soak it at 20°C for 24 hours, filter it, and continue to stand at 20°C for 24 hours to obtain a functional aggregate that can improve the crack resistance of concrete.

[0039] Concrete was prepared according to the concrete mix ratio shown in Table 1, in which the functional aggregate volume of the experimental group was 10%, and the sand was replaced by an equal volume, and the compressive strength of the concrete w...

Embodiment 2

[0048] Mix tap water and ethanol solution at a volume of 90:10 to prepare 20kg of solvent, adjust the pH value of the solvent to about 4.0 by slowly adding acetic acid dropwise, then slowly add 4g of KH570 dropwise, stir until the solution is uniform and transparent, and prepare the mass concentration 0.02% coupling agent solution. Select shale light and fine aggregates with a particle size of 0-5mm, and its dry apparent density is 1150kg / m 3 , 24h water absorption rate is 22.7%. Weigh 8kg of the light aggregate and place it in a silane coupling agent solution, soak it at 30°C for 18 hours, filter it, and continue to stand at 30°C for 18 hours to obtain a functional aggregate that can improve the crack resistance of concrete.

[0049] Concrete was prepared according to the concrete mix ratio shown in Table 3, in which the functional aggregate volume of the experimental group was 5%, and the sand was replaced by an equal volume, and the compressive strength of the concrete was...

Embodiment 3

[0057] Mix tap water and ethanol solution at a volume of 95:5 to prepare 50kg of solvent, adjust the pH value of the solvent to about 4.0 by slowly adding acetic acid dropwise, then slowly add 75g of KH560 dropwise, stir until the solution is uniform and transparent, and prepare the mass concentration 0.15% coupling agent solution. Select shale light and fine aggregate with a particle size of 5-20mm, and its dry apparent density is 1860kg / m 3 , 24h water absorption rate is 5.0%. Weigh 15kg of the light aggregate and place it in a silane coupling agent solution, soak it at 40°C for 12 hours, filter it, and continue to stand at 40°C for 12 hours to obtain a functional aggregate that can improve the crack resistance of concrete.

[0058] Concrete was prepared according to the concrete mix ratio shown in Table 5, in which the functional aggregate volume of the experimental group was 15%, and the equal volume replaced gravel, and the compressive strength of the concrete was tested...

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
water absorptionaaaaaaaaaa
water absorptionaaaaaaaaaa
water absorptionaaaaaaaaaa
Login to View More

Abstract

The invention discloses a functional aggregate for improving the crack resistance of concrete. The functional aggregate for improving the crack resistance of concrete comprises light aggregate soaked in a solution of a silane coupling agent, wherein a ratio of the mass of the silane coupling agent solution to the dry mass of the soaked light aggregate is no less than 2. The functional aggregate provided by the invention can regulate and control the internal humidity of the concrete, i.e., reduce the driving force for shrinkage and cracking, increase the hydration degree of cement and enhance an interfacial transition zone between the aggregate and set cement, i.e., the self-resistance of a concrete structure, so the purpose of improving the crack resistance of concrete is achieved.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a functional aggregate for improving the crack resistance of concrete. Background technique [0002] Cracks in concrete structures directly affect the service durability and safety of structures. Therefore, the improvement of its crack resistance has been widely studied and concerned. Essentially, the shrinkage cracking of concrete is caused by the fact that its own structural resistance cannot effectively resist the driving force of shrinkage cracking. [0003] In order to improve the crack resistance of concrete, it is usually adopted to reduce the driving force of shrinkage cracking or increase the resistance of its own structure. [0004] For example, adding functional materials such as expansion agents to achieve the effect of compensating shrinkage, or adding hydration heat regulating materials to suppress temperature cracks, or reducing humidity cracks throug...

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 Patents(China)
IPC IPC(8): C04B18/12
CPCC04B18/125Y02W30/91
Inventor 李明田倩王育江徐文姚婷李华
Owner JIANGSU SOBUTE NEW MATERIALS
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