CN106904997B - Electric field activated cement-based device and method - Google Patents
Electric field activated cement-based device and method Download PDFInfo
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- CN106904997B CN106904997B CN201710255385.XA CN201710255385A CN106904997B CN 106904997 B CN106904997 B CN 106904997B CN 201710255385 A CN201710255385 A CN 201710255385A CN 106904997 B CN106904997 B CN 106904997B
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0003—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability making use of electric or wave energy or particle radiation
- C04B40/0007—Electric, magnetic or electromagnetic fields
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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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Abstract
The present invention provides an apparatus for electric field activation of cement-based materials, comprising: a stirring pot, a thin copper sheet, a core rod, a bearing, an anti-winding part, a lead and a variable voltage power supply, and provides a method for activating a cement-based material by an electric field by adopting the device. Based on the electromagnetic water activation technology, the device and the method abandon the use of the electromagnetic water activation technology for mixing the cement-based material, but directly magnetize the cement mixture through an electric field, and compared with the prior electromagnetic water activation technology, the method has simpler operation and low cost.
Description
Technical Field
The invention belongs to the technical field of concrete, and particularly relates to a method and a device for activating a cement-based material by an electric field.
Background
With the rapid development of the building industry, concrete has become one of the most widely used building materials in the world, meanwhile, the construction requirements and the performance improvement of the concrete are also continuously improved, the concrete material is widely used in various fields such as highway bridges, civil buildings and the like, and thus, the concrete strength is improved, the raw materials are saved, and the working performance of the concrete is enhanced by scientists.
The concrete is developed to the present day, the composition structure of the concrete is changed greatly, and the concrete is not formed by four parts of water, cement, sand and stones. Gradually, a series of chemical additives such as an early strength agent added for improving the early strength of concrete, a water reducing agent used for reducing water amount without changing the slump of concrete, and mineral admixtures such as fly ash and silica fume have become the fifth and sixth components of concrete, although the addition of the additives and the mineral admixtures improves many advantageous properties of concrete, the concrete has disadvantages in practical application, the additives are mostly chemical reagents, and serious problems of environmental pollution, health hazard and the like are generated in production, and wastewater, waste materials and waste gas emission in different degrees exist in the process. If the pollution problem cannot be controlled and solved, or a safe and environment-friendly additive cannot be developed, the method is bound to be contradictory to the national policy of paying attention to environment protection and realizing sustainable development.
The experiments show that the electromagnetic activated water can completely hydrate the cement, increase the consistency of the concrete, have compact structure, improve the strength of the concrete, enhance the workability, reduce the consumption of the cement, reduce the pollution amount discharged by the produced cement, meet the requirements of building a green and environment-friendly society and have good economic and social benefits. The cement-based material mixed by the electromagnetic activated water has certain influence on reducing the cement consumption, reducing the economic cost, protecting the environment and the like.
On the basis of the electromagnetic water activation technology, the cement-based material is mixed by using the electromagnetic water activation technology, and the cement mixture is directly magnetized through an electric field.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for directly applying an electric field to a cement mixture, so that the same effect of stirring a cement-based material by using electromagnetic activated water is obtained, the operation is simpler, and the cost is lower.
To overcome the above technical problems, the present invention provides an apparatus for activating a cement-based material by an electric field, comprising: the device comprises a stirring pot, a thin copper sheet, a core rod, a bearing, an anti-winding part, a lead and a variable voltage power supply.
Wherein, the thin copper sheet is used as a cathode, and the thin copper sheet is fixed on the inner wall of the stirring pot for a circle by using epoxy resin.
Wherein the core rod is fixed on a stirring fin of the stirring pot and used as an anode.
The lead is led out through a guide rail connected with the bearing, and finally the lead connected with the thin copper sheet and the core rod is connected with a variable voltage power supply.
The anti-winding component comprises a four-corner support, double-layer steel plates and guide rails, the steel plates are fixed on the four-corner support through bolts and used for inserting the guide rails of the connecting wires into a gap steel plate groove between the double-layer steel plates, therefore, when the stirring wings rotate, the bearings drive the guide rails to rotate, the guide rails are clamped in the steel plate groove, and the wires cannot be wound accordingly.
The invention also provides a method for activating the cement-based material by the electric field by adopting the device for activating the cement-based material by the electric field, which comprises the following steps:
firstly, fixing a lead;
secondly, adding a cement base material;
thirdly, performing electric activation;
fourthly, measuring the expansion degree of the cement paste;
and fifthly, repeating the second step and the third step to prepare a mortar test block, respectively maintaining the test block for 3d, 7d and 28d, measuring the compressive strength and the flexural strength of the mortar, and comparing the mortar with a blank sample.
Turning on a variable voltage power supply, adjusting a voltage value according to needs to obtain an optimal voltage, and applying an electric field to the cement mixture until stirring is completed;
the fourth step is to quickly pour cement slurry into a truncated cone circular mold for measuring the expansion degree of the cement slurry and lift up the expansion degree of the cement slurry;
wherein the optimal voltage obtained in the third step is obtained by performing a physicochemical property change experiment of the activated water in different states, the experiment method comprising:
step a, filling water into a stirring pot, turning on a variable voltage power supply and a stirrer until stirring is stopped, and calibrating a pH meter by using a pH buffer solution during the period to prepare for measuring the pH of activated water;
b, pouring a certain amount of activated water and common water into a small beaker to measure the pH value of the activated water and the common water; respectively putting quantitative activated water and common water into a quartz vessel, and measuring the ultraviolet absorbance of the activated water and the common water; respectively measuring contact angles of a certain amount of activated water and common water on the mica graphite thin copper sheet;
step c, adjusting different voltage values, and repeating the process;
and d, comparing the experimental results, finding out the voltage value with the maximum change value of the physical property of the activated water, and obtaining the optimal electric field condition.
Advantageous technical effects
Compared with the traditional method for preparing the electric activation water in advance, the device and the method for activating the cement-based material by the electric field can reduce the time of exposing the activation water to the air, ensure that the activity of the water is not reduced, achieve the activation effect, and can generate the electric fields with different strengths by adjusting the voltage value to design a plurality of groups of comparison tests. The device is simple to operate, convenient to detach and low in cost.
Drawings
Fig. 1 is a schematic view of an apparatus for electric field activation of a cementitious material according to the present invention.
Detailed Description
The working principle of the invention is as follows: under the action of an electric field, the acting force between molecules is changed under the action of the electric field force, and in a natural state, water does not exist in a single molecule but exists mostly in a molecular group form, and an associated water molecular cluster and a single molecular state present a dynamic balance:
the energy required for this equilibrium process is supplied by the haloid of the water molecule, and the intermolecular hydrogen bonds are broken due to the thermal motion of the molecules, whereby large molecular clusters become small molecular clusters or single water molecules. The invention breaks the hydrogen bonds between the water molecules by applying the energy provided by the external electric field, destroys the large cluster structure in the water molecules, enhances the activity of water, increases more water molecules to contact with cement particles while stirring the cement material, so that the water wrapped in the cement particles is released to participate in the reaction, improves the hydration degree of the cement, increases the hydration products, and greatly improves the fluidity of the cement mixture and the work strength after hardening. The invention directly applies an electric field to the cement mixture, reduces the time of exposing the prepared activated water in the air, and finds out the optimal parameters by adjusting different voltage values and different electric field strengths.
The invention provides a device for activating a cement-based material by an electric field, which comprises: the device comprises a stirring pot, a thin copper sheet, a core rod, a bearing, an anti-winding part, a lead and a variable voltage power supply.
The thin copper sheet is used as a cathode, the thin copper sheet is fixed on the inner wall of the stirring pot for a circle by using epoxy resin to play an insulating role, and insulating materials are sprayed on the blank position of the inner wall of the stirring pot.
The core rod is fixed on the stirring fin of the stirring pot and used as an anode.
Because the stirring fin runs at high speed in the stirring process, the lead connected to the core rod is wound at the same time, in order to avoid the phenomenon, a bearing is arranged on the core rod and the stirring fin, the lead is led out through a guide rail connected with the bearing, and finally the lead connected to the thin copper sheet and the core rod is connected with a variable voltage power supply.
The anti-winding part comprises a four-corner support, double-layer steel plates and guide rails, the steel plates are fixed on the four-corner support through bolts and used for connecting the guide rails of the wires, the guide rails are inserted into a gap steel plate groove between the double-layer steel plates, therefore, when the stirring wings rotate, the guide rails are driven by bearings to rotate, the guide rails are clamped in the steel plate groove, and the wires cannot be wound accordingly.
The invention also provides a method for activating the cement-based material by the electric field by adopting the device for activating the cement-based material by the electric field, which comprises the following steps:
firstly, fixing a lead, namely fixing the lead in a steel plate groove by using a screw and connecting the lead with a variable voltage power supply;
secondly, adding a cement base material, and filling weighed cement and water into a stirring pot to obtain a cement mixture;
thirdly, performing electric activation, turning on a variable voltage power supply, adjusting a voltage value according to needs to obtain an optimal voltage, and applying an electric field to the cement mixture until stirring is completed;
fourthly, measuring the net slurry expansion degree of the cement, quickly pouring the cement slurry into a truncated cone circular mold for measuring the expansion degree of the cement slurry, and lifting the expansion degree of the measured cement slurry;
and fifthly, repeating the second step and the third step to prepare a mortar test block, respectively maintaining the test block for 3d, 7d and 28d, measuring the compressive strength and the flexural strength of the mortar, and comparing the mortar with a blank sample.
The temperature is maintained at room temperature, preferably 20 c, throughout the field activation process.
In the third step, the voltage value is adjusted to generate electric fields with different intensities so as to find the optimal electric field parameters and carry out a comparative test.
The water used for mixing the cement material was left standing at room temperature for 48 hours.
The optimal voltage obtained in the third step is obtained by performing a physicochemical property change experiment of the activated water in different states, the experiment method comprising:
step a, filling water into a stirring pot, turning on a variable voltage power supply and a stirrer until stirring is stopped, and calibrating a pH meter by using a pH buffer solution during the period to prepare for measuring the pH of activated water;
b, pouring a certain amount of activated water and common water into a small beaker to measure the pH value of the activated water and the common water; respectively putting quantitative activated water and common water into a quartz vessel, and measuring the ultraviolet absorbance of the activated water and the common water; respectively measuring contact angles of a certain amount of activated water and common water on the mica graphite thin copper sheet;
step c, adjusting different voltage values, and repeating the process;
and d, comparing the experimental results, finding out the voltage value with the maximum change value of the physical property of the activated water, and obtaining the optimal electric field condition.
Since the activated water has memory effect, all the comparative experiments should be completed within 20 minutes, and the experimental error is reduced.
Compared with other devices, the device and the method provided by the invention reduce the phenomenon that the sequencing distribution of water molecules is damaged in the process of transferring and pouring the prepared water, secondary formation of hydrogen bonds is caused, the activity of the water is influenced, and the expected effects of the fluidity of the cement mixture and the work strength after hardening are further influenced. The device prepares water and mixes cement materials in the same container, reduces experimental error, and ensures the activity of activated water and the effect of the activated water on the performance of the mixture.
Embodiments of the present invention will be described in detail below with reference to examples and drawings, by which how to apply technical means to solve technical problems and achieve a technical effect can be fully understood and implemented.
As shown in fig. 1, the present invention provides an apparatus for electric field activation of a cementitious material comprising: the device comprises a stirring pot 1, a thin copper sheet 2, a core rod 3, a bearing 4, an anti-winding part, a lead 5 and a variable voltage power supply 6. The thin copper sheet 2 is used as a cathode, the thin copper sheet is fixed on the inner wall of the stirring pot for one circle by epoxy resin to play an insulation role, and an insulation material is sprayed on the blank of the inner wall of the stirring pot. The mandrel 3 is fixed to a stirring fin 7 of the stirring pot and used as an anode. A bearing 4 is arranged on the core rod 3 and the stirring fin 7, a lead 5 is led out through a guide rail 8 connected with the bearing 4, and finally the lead 5 connected on the thin copper sheet and the core rod is connected with a transformation power supply 6. The anti-winding part comprises a four-corner support 9, a double-layer steel plate 10 and a guide rail 8, the steel plate 10 is fixed on the four-corner support 9 through bolts 11, the guide rail for connecting a lead is inserted into a steel plate groove 12 between the double-layer steel plate, therefore, when the stirring fin 7 rotates, the bearing 4 drives the guide rail 8 to rotate, the guide rail is clamped in the steel plate groove 12, and the lead 5 cannot be wound.
The concrete process of adopting the device to carry out electric field activation cement substrate is as follows: firstly, fixing a lead 5 in a steel plate groove 12 by using a screw and connecting the lead with a variable voltage power supply 6; secondly, filling weighed cement and water into a stirring pot 1 to obtain a cement mixture; thirdly, turning on a variable voltage power supply 6, adjusting a voltage value according to needs to obtain an optimal voltage, and applying an electric field to the cement mixture until stirring is completed; fourthly, pouring the cement slurry into the truncated cone circular mold quickly, and lifting up the expansion degree of the cement slurry to be measured; and fifthly, repeating the second step and the third step to prepare a mortar test block, respectively maintaining the test block for 3d, 7d and 28d, measuring the compressive strength and the flexural strength of the mortar, and comparing the mortar with a blank sample. The temperature was maintained at 20 ℃ throughout the electric field activation. The water used for mixing the cement material was left standing at room temperature for 48 hours.
The process of obtaining the optimal voltage value is as follows: step a, filling water into a stirring pot, turning on a variable voltage power supply and a stirrer until stirring is stopped, and calibrating a pH meter by using a pH buffer solution during the period to prepare for measuring the pH of activated water; b, pouring a certain amount of activated water and common water into a small beaker to measure the pH value of the activated water and the common water; respectively putting quantitative activated water and common water into a quartz vessel, and measuring the ultraviolet absorbance of the activated water and the common water; respectively measuring contact angles of a certain amount of activated water and common water on the mica graphite thin copper sheet; step c, adjusting different voltage values, and repeating the process; and d, comparing the experimental results, finding out the voltage value with the maximum change value of the physical property of the activated water, and obtaining the optimal electric field condition.
All of the above mentioned intellectual property rights are primarily implemented and are not intended to limit other forms of implementing such new products and/or methods. Those skilled in the art will take advantage of this important information, and the foregoing will be modified to achieve similar performance. However, all modifications or alterations are based on the new products of the invention and belong to the reserved rights.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (2)
1. A method of electric field activating a cementitious material using an apparatus for electric field activating a cementitious material, the apparatus comprising: the device comprises a stirring pot, a thin copper sheet, a core rod, a bearing, an anti-winding part, a lead and a variable voltage power supply;
the thin copper sheet is used as a cathode, and the thin copper sheet is fixed on the inner wall of the stirring pot for a circle by using epoxy resin;
the core rod is fixed on a stirring fin of the stirring pot and used as an anode;
a bearing is arranged on the core rod and the stirring fin of the stirring pot, a lead is led out through a guide rail connected with the bearing, and finally the lead connected with the thin copper sheet and the core rod is connected with a variable voltage power supply;
anti-tangling part includes four corners support, double-deck steel sheet and guide rail, and the steel sheet passes through the bolt fastening on the four corners support for connecting wire's guide rail is inserted in the steel sheet groove between the double-deck steel sheet, and when the stirring wing was rotatory from this, the bearing drove the guide rail and rotates, and the guide rail card is at the steel sheet inslot, so the wire can not consequently twine its characterized in that, the method includes:
firstly, fixing a lead;
secondly, adding a cement base material;
thirdly, performing electric activation, turning on a variable voltage power supply, adjusting a voltage value according to needs to obtain an optimal voltage, and applying an electric field to the cement mixture until stirring is completed;
fourthly, pouring cement slurry into the truncated cone circular mold quickly, and lifting up to measure the expansion degree of the cement slurry;
and fifthly, repeatedly preparing a mortar test block in the same process, respectively maintaining the test block for 3d, 7d and 28d, measuring the compressive strength and the flexural strength of the mortar, and comparing with a blank sample.
2. A method of electric field activating a cementitious material as claimed in claim 1 wherein: the method is characterized in that: the optimal voltage obtained in the third step is obtained by performing a physicochemical property change experiment of the activated water in different states, the experiment method comprising:
step a, filling water into a stirring pot, turning on a variable voltage power supply and a stirrer until stirring is stopped, and calibrating a pH meter by using a pH buffer solution during the period to prepare for measuring the pH of activated water;
b, pouring a certain amount of activated water and common water into a small beaker to measure the pH value of the activated water and the common water; respectively putting quantitative activated water and common water into a quartz vessel, and measuring the ultraviolet absorbance of the activated water and the common water; respectively measuring contact angles of a certain amount of activated water and common water on the mica graphite thin copper sheet;
step c, adjusting different voltage values, and repeating the process;
and d, comparing the experimental results, finding out the voltage value with the maximum change value of the physical property of the activated water, and obtaining the optimal electric field condition.
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| CN107856185A (en) * | 2017-11-06 | 2018-03-30 | 长安大学 | A kind of concrete central mix plant mixed and stirred based on high-frequency electric field activated water |
| CN112955416B (en) * | 2018-10-29 | 2023-07-21 | 根特大学 | External admixture for cementitious materials to influence the rheological properties of the cementitious material |
| CN109534749A (en) * | 2018-12-20 | 2019-03-29 | 郝鹏飞 | A kind of high-strength concrete and preparation method thereof that water consumption is low |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09134721A (en) * | 1995-11-09 | 1997-05-20 | Toyota Autom Loom Works Ltd | Manufacture of active material paste for core metal type electrode |
| CN101142341A (en) * | 2005-03-16 | 2008-03-12 | 格瑞斯·格拉斯 | Treatment process for concrete |
| CN104132878A (en) * | 2014-07-18 | 2014-11-05 | 青岛理工大学 | Cement-based material permeability test method and device under axial drawing load effect |
| CN104878935A (en) * | 2015-04-17 | 2015-09-02 | 张彭成 | Concrete construction technology capable of controlling setting time and special-purpose equipment of concrete construction technology |
| CN105587125A (en) * | 2015-06-29 | 2016-05-18 | 浙江大学 | Method for pouring concrete based on magnetic drive |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8267175B2 (en) * | 2006-09-25 | 2012-09-18 | Halliburton Energy Services, Inc. | Method for wellbore servicing to enhance the mechanical strength of cement using electrochemically activated water |
-
2017
- 2017-04-18 CN CN201710255385.XA patent/CN106904997B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09134721A (en) * | 1995-11-09 | 1997-05-20 | Toyota Autom Loom Works Ltd | Manufacture of active material paste for core metal type electrode |
| CN101142341A (en) * | 2005-03-16 | 2008-03-12 | 格瑞斯·格拉斯 | Treatment process for concrete |
| CN104132878A (en) * | 2014-07-18 | 2014-11-05 | 青岛理工大学 | Cement-based material permeability test method and device under axial drawing load effect |
| CN104878935A (en) * | 2015-04-17 | 2015-09-02 | 张彭成 | Concrete construction technology capable of controlling setting time and special-purpose equipment of concrete construction technology |
| CN105587125A (en) * | 2015-06-29 | 2016-05-18 | 浙江大学 | Method for pouring concrete based on magnetic drive |
Non-Patent Citations (3)
| Title |
|---|
| 刘治文.电场活化水拌和水泥混凝土性能的研究.《万方数据》.2016,第12-74页. * |
| 电场活化水拌和水泥混凝土性能的研究;刘治文;《万方数据》;20160504;第12-74页 * |
| 高频电场处理水泥浆改善其物理特性的实验研究;黄柳宾;《物理》;19971231;第674-678页 * |
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