CN101691793A - Intelligent building block and preparation method thereof - Google Patents
Intelligent building block and preparation method thereof Download PDFInfo
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- CN101691793A CN101691793A CN200910145878A CN200910145878A CN101691793A CN 101691793 A CN101691793 A CN 101691793A CN 200910145878 A CN200910145878 A CN 200910145878A CN 200910145878 A CN200910145878 A CN 200910145878A CN 101691793 A CN101691793 A CN 101691793A
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- carbon fiber
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- building block
- intelligent building
- gypsum
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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
- C04B28/14—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 calcium sulfate cements
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- 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)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses an intelligent building block and a preparation method thereof. The intelligent building block is prepared from the following raw materials: 3 parts of carbon fiber, 20 parts of gelling agent high-strength gypsum, 2 parts of dispersant polyester modified polyorganosiloxane, 0.8 part of plasticizer ash silicon powder, 0.2 part of polycarboxylate water reducer, 27 parts of infusorial earth and 45-50 parts of water. The invention is characterized by comprising the following preparation steps: (1) soaking; (2) mixing infusorial earth with gypsum and water; (3) preparing dispersant solution; (4) adding carbon fiber into the dispersant; (5) adding carbon fiber mixed liquor into the infusorial earth and gypsum mixture, and successively adding silica micropowder and polycarboxylate water reducer; (6) shaping; (7) curing; and (8) adhering electrodes. The intelligent building block has favourable mechanical property and can monitor structure situation in real time.
Description
Technical field
The present invention relates to building material field, particularly a kind of intelligent building block and preparation method.
Background technology
The carbon fiber intelligent building block is to add the material that chopped carbon fiber and other additive are made in building block with being uniformly dispersed.Utilize the sensitiveness of this material, make building block become a kind of multifunctional material that has from perception and memory, self adaptation, selfreparing characteristic electric current.By the intelligent building block situation of monitoring of structures in real time, satisfy structure oneself safety detection needs, prevent the brittle fracture that structure is potential.Carbon fiber can make the mechanical property of building block well be improved, such as compressive strength, toughness, tensile strength and the impact resistance etc. that improve matrix.Carbon fiber can change the electric conductivity and the pressure-sensitive of material as conductive material, and wherein the distribution situation of carbon fiber is most important to the influence of the electric conductivity of material and pressure-sensitive.The factor that influences the carbon fiber distributivity is a lot, mainly contains the length of carbon fiber, content, dispersing agent, water/binder ratio and the stirring technique etc. of carbon fiber.
Summary of the invention
At the deficiencies in the prior art, purpose of the present invention provides a kind of intelligent building block and preparation method.
Raw material proportioning of the present invention is as follows: carbon fiber content: 3 parts; Gelling agent high strength gypsum: 20 parts; Dispersing agent polyester-modified polysiloxanes: 2 parts; Plasticizing agent ash silica flour: 0.8 part; Polycarboxylate dehydragent: 0.2 part; Kieselguhr: 27 parts; Water: 45～50 parts.
Making step of the present invention comprises:
(1) soaks.
Chopped carbon fiber soaked in acetone soln take out oven dry behind 1～1.5h.
(2) kieselguhr and gypsum are mixed with water.
Add kieselguhr and gypsum in 50% total water amount, put into SB series mixer and stir 3min, speed is 30～40r/min, improves rotating speed then, and speed is 50～60r/min, and mixing time is 2min.
(3) configuration dispersant solution.
In 50% total water amount, add carboxymethyl cellulose.
(4) carbon fiber is joined dispersing agent.
Carbon fiber is joined in the dispersant solution, put into planetary cement mortar mixer and stir 5min.
(5) carbon fiber mixing liquid is added kieselguhr and gypsum mixture, and add silicon powder, polycarboxylate dehydragent successively.
(6) moulding
Moulding adopts vacuum to squeeze machine, and extrusion pressure is 6～8kg/cm
2, vacuum is-0.08MPa.Size is decided as required.
(7) maintenance
The intelligent building block insulated curing 24h～28h that makes, temperature is 25 ℃.
(8) paste electrode.
Cupric powder conductive adhesive is evenly coated on the block surfaces,, pastes a Copper Foil (25mm * 25mm, thickness are 0.4mm) at centre of surface, and weld lead-out wire thereon for the convenient lead that connects.
Mechanical property of the present invention is good, in real time monitoring of structures situation situation.
The specific embodiment
Make intelligent building block according to following manner.
The raw material proportioning is as follows: carbon fiber content: 3 parts; Gelling agent high strength gypsum: 20 parts; Dispersing agent polyester-modified polysiloxanes: 2 parts; Plasticizing agent ash silica flour: 0.8 part; Polycarboxylate dehydragent: 0.2 part; Kieselguhr: 27 parts; Water: 47 parts.
The raw material effect is as follows:
Table 1 is resistivity and carbon fiber content relation.When carbon fiber content less than 4, resistivity increases obviously with carbon fiber content and reduces, promptly electric conductivity enlarges markedly.At carbon fiber content hour, carbon fiber is in dispersity in intelligent building block, and the distance between the adjacent carbons fiber is bigger, can not form the favorable conductive network between the carbon fiber, playing the electric action main component is ionic conduction, so the electric conductivity of intelligent building block is poor.Along with the increase of the content of carbon fiber, in the intelligent building block carbon fiber to take knot more complete, form conductive network, become electronic conduction by ionic conduction, so resistivity flex point occurs at 3 parts.When carbon fiber content greater than 4 parts, it is very big to fluctuate.This is because carbon fiber content is excessive, is difficult to make it to be uniformly dispersed.
Table 1 resistivity and carbon fiber content relation
| Carbon fiber content | ??1 | ??2 | ??3 | ??4 | ??5 | ??6 | ??7 | ??8 | ??9 |
| Resistivity/(Qcm) | ??1100 | ??610 | ??220 | ??210 | ??206 | ??203 | ??263 | ??246 | ??215 |
High strength gypsum has very strong hydrating capacity, and after water mixed, high strength gypsum formed metasable state solution in aqueous solution dissolving, forms dihydrate gypsum from the semi-hydrated gypsum aquation when setting and harden.
The dispersing agent polyester-modified polysiloxanes has good hydrophily, the surface that can significantly reduce water after it adds can, increase viscosity in aqueous solution, impel carbon fiber to flow simultaneously along with solution, thereby improve the dispersiveness of fiber, and then can promote the dispersion of fiber in water, and polyester-modified polysiloxanes can form a kind of film at carbon fiber surface, and the carbon fiber that prevention has disperseed is owing to electrostatic interaction each other reassembles agglomerating.
Silicon powder can improve the viscosity of compound solution, helps being uniformly dispersed of carbon fiber.Hydration does not take place with water in ash silica flour itself basically, but it the secondary hydration reaction can take place under the excitation of compounds such as gypsum and generates the product with gelling; Next is the micro-aggregate characteristic because of silica flour, and it not only self can fill the harmful hole in the intelligent building block, and its secondary hydration product also can be filled the harmful hole in the intelligent building block, thereby improves the pore structure of intelligent building block.
Polycarboxylate dehydragent can improve concrete rheological characteristic and plasticity, strengthens product strength.
Kieselguhr porosity height is suitable for the dispersion of carbon fiber.
Table 2 is resistance value coefficient of alteration and water consumption relation, show less than resistance value coefficient of alteration in 45 parts bigger in the table, be carbon fiber dispersed relatively poor in intelligent building block, when water/binder ratio less greater than 45 parts of resistance value coefficients of alteration, the dispersiveness that is carbon fiber has had very big improvement, after surpassing 45 parts, the resistance value coefficient of alteration of intelligent building block changes little, and promptly the dispersiveness of carbon fiber does not have great improvement.Consider that water blending amount is big more, block strength can reduce, so material and water ratio are 45～50 parts.
Table 2 resistance value coefficient of alteration and water consumption relation
| Water consumption | ??30 | ??35 | ??40 | ??45 | ??50 | ??55 | ??60 | ??65 | ??70 |
| The resistance value coefficient of alteration | ??0.092 | ??0.076 | ??0.062 | ??0.050 | ??0.056 | ??0.060 | ??0.063 | ??0.064 | ??0.065 |
Watering quantity is big more, and when the mobile property of compound was big, the resistance that fiber disperses in matrix reduced, so fiber scatter easily; Watering quantity is too small, and when the flowability of compound was low, the frictional resistance that fiber moves increased, so fiber not only is difficult to even dispersion, and the group of being easy to; When watering quantity was big, carbon fiber was uniformly dispersed, and therefore finely dispersed carbon fiber makes intelligent building block resistance value coefficient of alteration change not quite.
Making step comprises:
(1) soaks.
Chopped carbon fiber soaked in acetone soln take out oven dry behind 1～1.5h.
(2) kieselguhr and gypsum are mixed with water.
Add kieselguhr and gypsum in 50% total water amount, put into SB series mixer and stir 3min, speed is 30～40r/min, improves rotating speed then, and speed is 50～60r/min, and mixing time is 2min.
SB series mixer has the characteristics of stepless time adjustment, speed change stirring.When just adding carbon fiber, because denseness is big, resistance is big, so adopt stirring at low speed; After a period of time, viscosity and denseness reduce, and rotating speed is upgraded to middling speed, to increase the dispersion force to compound, make compound be trickle shape and suspend, and keep compound stable.In addition, SB series mixer is by the change of internal mechanism, makes its mixing power mainly change that to rub up be main into by being cut into, and helps compound and mixes.
(3) configuration dispersant solution.
In 50% total water amount, add carboxymethyl cellulose.
(4) carbon fiber is joined the dispersing agent polyester-modified polysiloxanes.
Carbon fiber is joined in the dispersant solution, put into planetary cement mortar mixer and stir 5min.
The mixer of preparation intelligent building block is planetary cement mortar mixer, blade can all directions not be stopped in mixing drum stirring, and throwing and impact material, especially under fast state, material is easier to be broken up, it is is evenly mixed and stirred, and in mixer, carbon fiber is difficult for becoming entangled in simultaneously mutually.
Dispersing agent polyester-modified polysiloxanes water imbibition is strong, and along with the prolongation of mixing time, the dispersant solution thickness that can become gradually.Simultaneously because test adopts is the mode of adding carbon fiber while stirring, therefore, the control of the mixing time particular importance that seems, carbon fiber must add before the solution becomes thickness and finish.
(5) carbon fiber mixing liquid is added kieselguhr and gypsum mixture, and add silicon powder, polycarboxylate dehydragent successively.
Find in the test that feeding sequence has very big influence for the dispersiveness of carbon fiber, according to above-mentioned feeding sequence, carbon fiber is dispersed into thread in silicon powder solution as can be seen.
(6) moulding
Moulding adopts vacuum to squeeze machine, and extrusion pressure is 6～8kg/cm
2, vacuum is-0.08MPa.Be of a size of 390 * 190 * 190mm.
(7) maintenance
The intelligent building block insulated curing 24～28h that makes, temperature is 25 ℃.
(8) paste electrode.
Cupric powder conductive adhesive is evenly coated on the block surfaces,, pastes a Copper Foil (25mm * 25mm, thickness are 0.4mm) at centre of surface, and weld lead-out wire thereon for the convenient lead that connects.
Claims (4)
1. intelligent building block, its raw material proportioning is as follows: carbon fiber content: 3 parts; Gelling agent high strength gypsum: 20 parts; Dispersing agent polyester-modified polysiloxanes: 2 parts; Plasticizing agent ash silica flour: 0.8 part; Polycarboxylate dehydragent: 0.2 part; Kieselguhr: 27 parts; Water: 45～50 parts.
2. intelligent building block preparation method, its feature comprises following making step:
(1) soaks.
Chopped carbon fiber soaked in acetone soln take out oven dry behind 1～1.5h.
(2) mix.
In 50% total water amount, add kieselguhr and gypsum, put into the middling speed stirring again of SB series mixer elder generation's stirring at low speed.
(3) configuration dispersant solution.
In 50% total water amount, add carboxymethyl cellulose.
(4) carbon fiber is joined dispersing agent.
Carbon fiber is joined in the dispersant solution, put into planetary cement mortar mixer and stir.
(5) carbon fiber mixing liquid is added kieselguhr and gypsum mixture, and add silicon powder, polycarboxylate dehydragent successively.
(6) moulding
Moulding adopts vacuum to squeeze machine, and extrusion pressure is 6～8kg/cm
2, vacuum is-0.08MPa.Size is decided as required.
(7) maintenance
The intelligent building block insulated curing 24～28h that makes, temperature is 25 ℃.
(8) paste electrode.
Cupric powder conductive adhesive is evenly coated on the block surfaces,, pastes a Copper Foil (25mm * 25mm, thickness are 0.4mm) at centre of surface, and weld lead-out wire thereon for the convenient lead that connects.
3. according to claim 1 or the described intelligent building block preparation method of claim 2, it is characterized in that: stirring at low speed speed is 30～40r/min in the combination process, and mixing time is 3min; The middling speed mixing speed is 50～60r/min, and mixing time is 2min.
4. according to claim 1 or the described intelligent building block preparation method of claim 2, it is characterized in that: carbon fiber joins that mixing time is 5min behind the dispersant solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101458783A CN101691793B (en) | 2009-06-09 | 2009-06-09 | Intelligent building block and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101458783A CN101691793B (en) | 2009-06-09 | 2009-06-09 | Intelligent building block and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN101691793A true CN101691793A (en) | 2010-04-07 |
| CN101691793B CN101691793B (en) | 2011-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101458783A Expired - Fee Related CN101691793B (en) | 2009-06-09 | 2009-06-09 | Intelligent building block and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101982442A (en) * | 2010-10-27 | 2011-03-02 | 朱奎 | Heat reserving brick for curing room |
| CN106966655A (en) * | 2017-03-31 | 2017-07-21 | 安徽中煦环保新材料科技有限公司 | A kind of environmental-friendly construction material of service life length and preparation method thereof |
| CN109704618A (en) * | 2019-01-11 | 2019-05-03 | 深鹏环保工程有限公司 | A kind of dregs compression strength of building block reinforcing agent and preparation method |
| CN110423097A (en) * | 2019-09-06 | 2019-11-08 | 西北工业大学 | The method of building block is quickly prepared under a kind of room temperature without furnace |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1175154C (en) * | 2000-01-18 | 2004-11-10 | 赵永定 | Prorous building block containing fibrous gypsum |
| CN1868961A (en) * | 2006-06-01 | 2006-11-29 | 肖忠渊 | Carbon fiber reinforced architectual material |
| CN201128965Y (en) * | 2007-09-18 | 2008-10-08 | 段风雷 | Large porosity thin wall porous brick |
-
2009
- 2009-06-09 CN CN2009101458783A patent/CN101691793B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101982442A (en) * | 2010-10-27 | 2011-03-02 | 朱奎 | Heat reserving brick for curing room |
| CN101982442B (en) * | 2010-10-27 | 2012-09-12 | 朱奎 | Heat reserving brick for curing room |
| CN106966655A (en) * | 2017-03-31 | 2017-07-21 | 安徽中煦环保新材料科技有限公司 | A kind of environmental-friendly construction material of service life length and preparation method thereof |
| CN109704618A (en) * | 2019-01-11 | 2019-05-03 | 深鹏环保工程有限公司 | A kind of dregs compression strength of building block reinforcing agent and preparation method |
| CN110423097A (en) * | 2019-09-06 | 2019-11-08 | 西北工业大学 | The method of building block is quickly prepared under a kind of room temperature without furnace |
| CN110423097B (en) * | 2019-09-06 | 2021-12-28 | 西北工业大学 | Method for rapidly preparing building block without furnace at normal temperature |
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| CN101691793B (en) | 2011-02-02 |
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Granted publication date: 20110202 Termination date: 20110609 |