Composite cement-based material and composite cement-based material sensor

A technology of composite cement and base materials, applied in the field of composite cement-based materials and composite cement-based materials sensors

Inactive Publication Date: 2020-10-27
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the application of piezoelectric ceramic sensing and monitoring technology to concrete requires consideration of compatibility issues.

Method used

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  • Composite cement-based material and composite cement-based material sensor
  • Composite cement-based material and composite cement-based material sensor
  • Composite cement-based material and composite cement-based material sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Take by weighing 0.1g of multi-walled carbon nanotubes MWCNT, weigh 75mL mass fraction of 98% concentrated nitric acid and 25mL mass fraction of 68% concentrated sulfuric acid respectively, press concentrated nitric acid and concentrated sulfuric acid in a beaker for 3 The volume ratio of :1 is configured into a mixed acid solution, and the obtained mixed acid is added to a flat-bottomed flask equipped with carbon nanotubes, and the flask is continuously pulsed ultrasonically dispersed for 15 minutes under the condition of 600w with an ultrasonic disperser, and then the dispersed carbon nanotubes Put the tube into a magnetic stirrer for acid oxidation treatment at 80°C for 8 hours. After the acidification treatment, add deionized water to the flat-bottomed flask to dilute the acid solution, use a microporous membrane to filter under vacuum and reduce pressure, and use an evaporating dish to recover the acid oxidation. The final carbon nanotubes were washed repeatedly...

Embodiment 2

[0037] The basic steps are the same as in Example 1, except that in step (3), 0.012 g of carbon fiber is added to the reactor, and the reactor is put into an oven and reacted for 48 hours at 200 ° C; in step (5), carbon nanotubes are grafted The carbon fiber quality is 0.2% of the cement quality; in step (6), the dosage of the cerium oxide-graphene oxide composite material is 0.5% of the epoxy resin quality, and its thickness is 5mm.

Embodiment 3

[0039]The basic steps are the same as in Example 1, except that in step (3), 0.01 g of carbon fiber is added to the reactor, and the reactor is put into an oven and reacted for 49 hours at 190° C.; in step (5), carbon nanotubes are grafted The carbon fiber quality is 0.6% of the cement quality; in step (6), the dosage of the cerium oxide-graphene oxide composite material is 0.7% of the epoxy resin quality, and its thickness is 7mm.

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Abstract

The invention discloses a composite cement-based material and a composite cement-based material sensor. The composite cement-based material comprises cement mortar, and the cement mortar is doped witha carbon fiber material grafted with carbon nanotubes. The composite cement-based material sensor comprises the composite cement-based material, a conductive rust-proof part arranged on the surface of the composite cement-based material, an epoxy resin coating layer arranged on the conductive rust-proof part, and an insulation board arranged on the outer side of the epoxy resin coating layer. Thecarbon fiber grafted with the carbon nanotubes is good in dispersity in a cement base and higher in interface bonding capacity with the cement base. The composite cement-based material sensor is simple in structure and sensitive in monitoring, can be suitable for mass concrete in various environments, and can accurately monitor the internal stress condition of the concrete so as to judge the damage degree and the corrosion condition of the concrete.

Description

technical field [0001] The invention relates to a cement-based material and a sensor, in particular to a composite cement-based material and a composite cement-based material sensor. Background technique [0002] With the progress and development of society, the use of concrete in the field of construction is becoming wider and wider. As a building material, concrete has many advantages, such as sufficient raw materials, low cost, and convenient construction. At the same time, concrete is also functional, with high compressive strength, large elastic modulus, and high temperature resistance. However, through a large number of engineering practices, it is known that most concrete is in a state of damage during service, mainly due to the complex factors in the service environment that destroy the external and internal structures of concrete to varying degrees, causing carbonization of concrete and peeling of the protective layer. The durability of concrete is reduced, and it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B14/38C04B20/02C04B41/65G01D5/12
CPCC04B28/00C04B14/386C04B20/023C04B41/65C04B41/5045G01D5/12C04B2103/50C04B41/5001C04B41/4853
Inventor 刘小艳江波揭汉铎余瑾瑶刘彦琦刘力李世杰姜可伟
Owner HOHAI UNIV
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