CN100582052C - Pressure-sensitive cement-base composite material - Google Patents
Pressure-sensitive cement-base composite material Download PDFInfo
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- CN100582052C CN100582052C CN200710072474A CN200710072474A CN100582052C CN 100582052 C CN100582052 C CN 100582052C CN 200710072474 A CN200710072474 A CN 200710072474A CN 200710072474 A CN200710072474 A CN 200710072474A CN 100582052 C CN100582052 C CN 100582052C
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- cement
- composite material
- pressure
- base composite
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/90—Electrical properties
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The present invention discloses a pressed cement composite material, which relates to a cement composite material; the present invention is to solve the shortcoming in the existing pressed cement material that: the sense ability for the force-electricity coupling effect is much lower, the existing method is influenced by the humidity greatly, and the base polarization is easy to influence the test of the electricity signal. The present invention consists of a function component and cement material; the function component is a nickel powder or a mixture between the nickel powder and one or more than one material including carbon cellulose, carbon, graphite and steel residual; the cement material is a glue material or a composite material between the glue material and the bone material; thereinto, the function component occupies between 1 percent and 80 percent in the total weight; and the rested is the cement material. The sense ability of the pressed cement composite material in the present invention is much higher; the sensitivity can reach to more than hundred or thousand, which is higher than the sensitivity of the existing pressed cement composite material with the function component including carbon cellulose, carbon and steel residual and so on. Besides, the force-electricity coupling effect for the material is much smaller by the humidity; the test of the electricity signal is not easy to be influenced by the base polarization.
Description
Technical field
The present invention relates to a kind of cement-base composite material.
Background technology
1989, after U.S. professor D.D.L.Chung finds that traditional cement-based material mixes chopped carbon fiber, made carbon-fiber cement based composites is under the effect in the field of force or temperature field, volume resistance can produce clocklike and change, therefore the carbon-fiber cement sill can pass through stress, strain, damage and the temperature of the variation perception self of resistivity, promptly has power-coupling effect, heat-coupling effect (power-coupling effect, heat-coupling effect are referred to as agility).Go back by research that discovery feature component (in carbon black, slag and the nanoparticle etc. one or several mixing) and cement-based material are compound to have power-electric coupling characteristic too.Because cement-based material has characteristics such as perceptual sensitivity height, good endurance, cost are low, utilizes it both can develop the cement based sensing member, but also development structure and intrinsic intelligence structure from the perception function integration.Therefore at stress, strain, the monitoring steel bar corrosion of concrete structure, vehicle weighing, traffic field such as test the speed all has a wide range of applications.
The used function ingredients of pressure-sensitive cement sill mainly comprises carbon fiber, carbon black, slag and nano titanium oxide at present.Wherein carbon fiber causes the repeatability and the difficult control of stability of power-electric coupling performance because fine, hydrophobic is difficult to disperse in cement-based material; Carbon black is owing to be subjected to the influence of cement-based material internal water content, and it is bigger that power-the electric coupling performance is influenced by environmental change; Slag is owing to the self-conductive poor-performing, and the electrical signal test is subject to matrix polarization influence; Nano titanium oxide is a semiconductor material, and it mixes and exists the electrical signal test to be subjected to the influence of matrix material polarized action significantly to be unfavorable for the shortcoming of testing in the cement-based material equally.
Summary of the invention
The objective of the invention is to exist power-coupling effect sensitivity low and be subjected to that humidity effect is big, the matrix polarization easily influences defectives such as electrical signal test, and a kind of pressure-sensitive cement-base composite material is provided in order to solve existing pressure-sensitive cement sill.Pressure-sensitive cement-base composite material of the present invention is made up of function ingredients and cement-based material, function ingredients is one or more a mixture in nickel powder or nickel powder and carbon fiber, carbon black, graphite, the slag, and cement-based material is the matrix material of gelling material or gelling material and aggregate; Wherein function ingredients accounts for 1～80% of gross weight, and all the other are cement-based material; When function ingredients is one or more a mixture in nickel powder and carbon fiber, carbon black, graphite, the slag, nickel powder accounts for 1～95% of function ingredients weight.Described gelling material is the mixture of cement or cement and mineral admixture, and wherein mineral admixture is one or more mixing in silicon ash, flyash, zeolite powder, the silica powder; Described aggregate is that sand or sand and particle diameter are the mixture of 5～20mm stone.
Pressure-sensitive cement-base composite material of the present invention adopts the making method identical with the Portland cement sill to make: at first by dispersion, whipping device function ingredients and cement-based material are evenly mixed, moulding then, maintenance form.
Power-the coupling effect of pressure-sensitive cement-base composite material of the present invention highly sensitive (stress sensitivity can reach 0.0328/MPa), strain sensitivity can reach hundreds of to thousands of (the strain sensing sensitivity factor as resistance strain gage only is 2～3), also far above existing be the sensitivity of the pressure-sensitive cement-base composite material power-coupling effect of function ingredients with carbon fiber, carbon black, slag etc., and power-coupling effect is subjected to, and humidity effect is little, the electrical signal test is not subject to the matrix polarization influences.
The pressure-sensitive cement-base sensing member that the pressure-sensitive cement-base composite material of the power of having of the present invention-coupling effect is made not only can be used for the monitoring of field concrete structure stress/strains such as civil engineering work, water conservancy project, nuclear installation, also can be used for stress, the strain-gauging of other industrial circle.
Description of drawings
Fig. 1 is that the pressure-sensitive cement-base composite material of the specific embodiment of the invention nine is at the change in resistance rate of elastic stage and the graph of relation of stress.
Embodiment
Embodiment one: the pressure-sensitive cement-base composite material of present embodiment is made up of function ingredients and cement-based material, and function ingredients is a nickel powder, and cement-based material is the matrix material of gelling material or gelling material and aggregate; Wherein function ingredients accounts for 1～80% of gross weight, and all the other are cement-based material.
Embodiment two: present embodiment and embodiment one difference are that function ingredients accounts for 40～70% of gross weight.Other is identical with embodiment one.
Embodiment three: present embodiment and embodiment one difference are that function ingredients accounts for 55% of gross weight.Other is identical with embodiment one.
Embodiment four: present embodiment and embodiment one difference are also to comprise one or more materials in carbon fiber, carbon black, graphite, the slag in the function ingredients that wherein nickel powder accounts for 1～95% of function ingredients weight.Other is identical with embodiment one.
Present embodiment is when several mixings of carbon fiber, carbon black, graphite, slag that increase, by arbitrarily than mixing.
Embodiment five: present embodiment and embodiment four differences are that nickel powder accounts for 60～90% of function ingredients weight.Other is identical with embodiment four.
Embodiment six: present embodiment and embodiment four differences are that nickel powder accounts for 80% of function ingredients weight.Other is identical with embodiment four.
Embodiment seven: present embodiment and embodiment one and four differences are that gelling material is the compound material of cement or cement and mineral admixture, when gelling material is the compound material of cement and mineral admixture, mineral admixture is 0～50% of a cement weight, and wherein mineral admixture is one or more mixing in silicon ash, flyash, zeolite powder, the silica powder.Other is identical with embodiment one and four.
When mineral admixture is mixture in the present embodiment, press arbitrarily than mixing.
Embodiment eight: the aggregate that present embodiment and embodiment seven differences are is that sand or sand and particle diameter are the compound material of 5～20mm stone.Other is identical with embodiment seven.
Aggregate is sand and particle diameter when being the compound material of 5～20mm stone in the present embodiment, by arbitrarily than mixing.
Embodiment nine: the present embodiment pressure-sensitive cement-base composite material is made up of nickel powder and cement stone, and the weight ratio of nickel powder and cement stone is 3: 2.
Adopt making method, forming method and the maintaining process identical with the Portland cement sill to prepare the specific embodiment of the present invention nine described matrix materials, electrode adopts the embed type ring electrode, and resistance test adopts direct current four end electrode methods.Test adds resistance under the action of compressive stress in the elastic stage difference, and calculated resistance rate velocity of variation, and the matrix material of present embodiment is at its resistivity of elastic stage relation curve such as Fig. 1 with applied stress.The corresponding relation of its change in resistance rate and stress, compressive strain such as following table 1:
Table 1
| Stress (MPa) | 0 | 12.5 |
| Strain (microstrain) | 0 | 801 |
| Change in resistance rate (%) | 0 | 41 |
Shown that by test result the power-coupling effect of matrix material of the present invention is highly sensitive: stress sensitivity can reach 0.0328/MPa, and strain sensitivity can reach 500, and (the strain sensing sensitivity factor as resistance strain gage only is 2～3.
Embodiment ten: the present embodiment pressure-sensitive cement-base composite material is made up of nickel powder, carbon black and cement stone, and wherein the weight ratio of nickel powder, carbon black and cement stone is 3: 2: 15.
Adopt making method, forming method and the maintaining process identical with the Portland cement sill to prepare the specific embodiment of the present invention nine described matrix materials, electrode adopts the embed type ring electrode, and resistance test adopts direct current four end electrode methods.Test adds resistance under the action of compressive stress in the elastic stage difference, and calculated resistance rate velocity of variation, the matrix material of present embodiment in its change in resistance rate of elastic stage with adding stress, strained Changing Pattern such as following table 2:
Table 2
| Stress (MPa) | 0 | 5 | 10 | 12.5 |
| Strain (microstrain) | 0 | 604 | 1157 | 1358 |
| Change in resistance rate (%) | 0 | 7.28 | 13.42 | 15.19 |
Shown that by test result the power-coupling effect of matrix material of the present invention is highly sensitive: stress sensitivity can reach 0.0122/MPa, and strain sensitivity can reach 119, and (the strain sensing sensitivity factor as resistance strain gage only is 2～3.
Claims (8)
1, a kind of pressure-sensitive cement-base composite material is characterized in that it is made up of function ingredients and cement-based material; Function ingredients is a nickel powder, and cement-based material is the matrix material of gelling material or gelling material and aggregate, and gelling material is the mixture of cement or cement and mineral admixture; Wherein function ingredients accounts for 1～80% of gross weight, and all the other are cement-based material.
2, a kind of pressure-sensitive cement-base composite material according to claim 1 is characterized in that function ingredients accounts for 40～70% of gross weight.
3, a kind of pressure-sensitive cement-base composite material according to claim 1 is characterized in that function ingredients accounts for 55% of gross weight.
4, a kind of pressure-sensitive cement-base composite material according to claim 1 is characterized in that when gelling material is the compound material of cement and mineral admixture mineral admixture is 0～50% of a cement weight; Wherein mineral admixture is one or more mixing in silicon ash, flyash, zeolite powder, the silica powder.
5, a kind of pressure-sensitive cement-base composite material according to claim 1 is characterized in that aggregate is that sand or sand and particle diameter are the mixture of 5～20mm stone.
6, a kind of pressure-sensitive cement-base composite material according to claim 1 is characterized in that function ingredients also comprises in carbon fiber, carbon black, graphite, the slag one or more mixture, and wherein nickel powder accounts for 1～95% of function ingredients weight.
7, a kind of pressure-sensitive cement-base composite material according to claim 6 is characterized in that nickel powder accounts for 60～90% of function ingredients weight.
8, a kind of pressure-sensitive cement-base composite material according to claim 6 is characterized in that nickel powder accounts for 80% of function ingredients weight.
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| CN200710072474A CN100582052C (en) | 2007-07-06 | 2007-07-06 | Pressure-sensitive cement-base composite material |
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| CN200710072474A CN100582052C (en) | 2007-07-06 | 2007-07-06 | Pressure-sensitive cement-base composite material |
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| CN100582052C true CN100582052C (en) | 2010-01-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102102328A (en) * | 2010-12-22 | 2011-06-22 | 哈尔滨工业大学 | Self-sensing pavement structure of road or bridge |
| CN102135457B (en) * | 2011-02-22 | 2012-10-17 | 哈尔滨工业大学 | Method for extracting sensing signal of smart cement-based material |
| CN102797296B (en) * | 2012-07-13 | 2014-10-22 | 哈尔滨工业大学 | CP anode function and stress self-induction integral intelligent composite material |
| CN103011694B (en) * | 2012-11-29 | 2014-11-26 | 山东大学 | Polyethylene terephthalate (PET)-based composite material capable of sensing stress variation and preparation method thereof |
| CN104230196A (en) * | 2014-09-15 | 2014-12-24 | 荣成炭谷有限公司 | Novel cement and manufacturing method thereof |
| CN105060790B (en) * | 2015-08-12 | 2017-05-24 | 大连理工大学 | Electrostatic self-assembly carbon nano tube/nano-carbon black composite mortar as well as preparation method and application thereof |
| CN105272048A (en) * | 2015-11-13 | 2016-01-27 | 哈尔滨工业大学 | Strain self-sensing multi-scale carbon-cement composite pavement material capable of melting snow and ice |
| CN105336083B (en) * | 2015-12-03 | 2018-06-29 | 山东大学 | Tunnel fire hazard early warning sensor and its road surface arranging system based on smart material |
| CN108362738A (en) * | 2018-02-02 | 2018-08-03 | 山西省交通科学研究院 | Asphalt pavement structure damage alarm method based on the quick characteristic of power-motor |
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Non-Patent Citations (2)
| Title |
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| 水泥及水泥基复合材料的机敏性研究. 孙明清.材料导报，第16卷第5期. 2002 |
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