Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Water-conservancy-project high-water-head tunnel spillway bottom plate concrete crack defect inhibitor and preparation method thereof

A technology of high water head and flood discharge tunnel, applied in the field of admixtures for suppressing cracks and concrete crack defect inhibitors, to achieve the effect of reducing cracks and penetrating cracks, uniform concrete structure, and reducing surface defects

Pending Publication Date: 2018-06-12
NANJING HYDRAULIC RES INST
View PDF11 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical key of the present invention is to suppress the plastic settlement of the concrete stage of the floor of the flood discharge tunnel with high water head, increase the early tensile stress of the high-grade silica fume concrete, improve the compactness, uniformity and surface finish of the concrete structure, and reduce the uneven temperature stress and surface impact. Grinding the generation and development of micro-crack defects, improving the durability 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
  • Water-conservancy-project high-water-head tunnel spillway bottom plate concrete crack defect inhibitor and preparation method thereof
  • Water-conservancy-project high-water-head tunnel spillway bottom plate concrete crack defect inhibitor and preparation method thereof
  • Water-conservancy-project high-water-head tunnel spillway bottom plate concrete crack defect inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The concrete crack defect inhibitor for the floor of the hydraulic high-head flood discharge tunnel in this embodiment has the following weight components: special plastic expansion agent for cement-based grouting material: 0.3%; polysiloxane powder: 0.03%; calcium oxide clinker and gypsum composite Expansion agent: 45.0%; pozzolan ultrafine aluminosilicate mineral powder: 54.67%, the above components are accurately weighed by weight percentage, and the present invention is prepared according to the process described in Example 7.

Embodiment 2

[0026] The concrete crack defect inhibitor for the floor of the hydraulic high-head flood discharge tunnel in this embodiment has the following weight components: special plastic expansion agent for cement-based grouting material: 0.5%; polysiloxane powder: 0.05%; calcium sulfoaluminate-calcium oxide Clinker and gypsum composite expansion agent: 45.0%; pozzolan ultrafine aluminosilicate mineral powder: 49.45%, the above components are accurately weighed by weight percentage, and the present invention is prepared according to the process described in Example 7.

Embodiment 3

[0028] The concrete crack defect inhibitor for the floor of the hydraulic high-head flood discharge tunnel in this embodiment has the following weight components: plastic expansion agent for cement-based grouting material: 0.3%; polysiloxane powder: 0.05%; R-type magnesium oxide-calcium oxide Clinker and gypsum composite expansion agent: 50.0%; pozzolan ultrafine aluminosilicate mineral powder: 49.47%, the above components are accurately weighed by weight percentage, and the present invention is prepared according to the process described in Example 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
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a water-conservancy-project high-water-head tunnel spillway bottom plate concrete crack defect inhibitor and a preparation method thereof. The inhibitor comprises, by weight percentage, 0.0-1.0% of plastic expanding agent special for cement-based grouting material, 0.03-0.05% of water repellent, 45.0-50.0% of waterproof expanding agent, 49.0-54.8% of high-quality mineral admixture. The inhibitor is prepared by evenly mixing the materials above in a high-speed stirrer. The prepared inhibitor is capable of effectively preventing concrete plastic settling micro-crack defects, capable of blocking capillary pore channels, capable of increasing the early tensile stress of concrete, capable of improving the structural compactness, uniformity and surface smoothness of the concrete, capable of reducing crack defects caused by uneven temperature stress and surface impact and abrasion, capable of increasing the impact and abrasion resisting strength of the water-conservancy-project high-water-head tunnel spillway bottom plate concrete by 50%, and capable of reducing surface cracks and penetrating cracks by more than 70%.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to a concrete crack defect inhibitor prepared by a conventional process, in particular to an admixture for inhibiting crack generation developed for the floor concrete of a flood discharge tunnel with a high hydraulic head. Background technique [0002] The generation and development of concrete cracks is a complex process of change. The reasons for the occurrence and development of concrete cracks in different grades and construction conditions are different. It is necessary to develop a series of materials for different types of concrete to suppress the source of crack defects, so as to avoid it may cause concrete damage. subsequent hazards. [0003] As a renewable clean energy, hydropower occupies an important position in the history of energy development in my country and is one of the important driving forces for the sustainable development of the national economy. It ...

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): C04B24/42C04B28/04
CPCC04B28/04C04B40/0039C04B2201/50C04B2201/52C04B24/42C04B2103/0068C04B22/064C04B22/143C04B14/14C04B14/06C04B14/02C04B18/08C04B2103/302
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
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
Eureka Blog
Learn More
PatSnap group products