CN112454656A - Concrete plastic viscosity real-time monitoring equipment and method - Google Patents
Concrete plastic viscosity real-time monitoring equipment and method Download PDFInfo
- Publication number
- CN112454656A CN112454656A CN202011166598.3A CN202011166598A CN112454656A CN 112454656 A CN112454656 A CN 112454656A CN 202011166598 A CN202011166598 A CN 202011166598A CN 112454656 A CN112454656 A CN 112454656A
- Authority
- CN
- China
- Prior art keywords
- plastic viscosity
- concrete
- stirring
- stress
- real
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/0806—Details; Accessories
Abstract
The invention relates to a concrete plastic viscosity real-time monitoring device and a method, wherein the original bottom layer data of concrete plastic viscosity calculation completely comes from a stress sensor arranged on an intelligent stirring blade, the original bottom layer data of the concrete plastic viscosity calculation is transmitted to a concrete plastic viscosity calculation terminal through a stress data wireless transmitter, and the real-time plastic viscosity result of fresh concrete in a stirring barrel is calculated in real time through a conversion algorithm based on stress-power-plastic viscosity.
Description
Technical Field
The invention belongs to the technical field of civil engineering building materials, and relates to a concrete plastic viscosity real-time monitoring device and method applied to a concrete preparation process.
Background
The workability of the fresh concrete has important significance for the integral construction of engineering projects. The workability of the fresh concrete means that the fresh concrete is easy to construct and operate, can obtain the concrete performance with homogeneous quality and compact forming, is a comprehensive evaluation of the performance of the fresh concrete, and generally comprises the following steps: fluidity, plasticity, consistency, stability, spreadability, pumpability, easy pouring, slump loss and the like.
The workability of the fresh concrete covers various performances of the fresh concrete, the evaluation method of the workability is more, and a single method cannot cover all the factors of the workability of the concrete.
At present, the most common method for evaluating the workability of concrete in engineering is slump test, indexes extracted in the slump test are quantitative indexes, the slump test belongs to post-process detection, and the slump test result data has strong fuzziness and cannot accurately cover all elements of the workability of concrete.
In the concrete preparation process, no commonly adopted working detection method exists at present, based on the concrete mixing plant working practice, at present, engineering technicians take the fluctuation and stable conversion process of the current data of a concrete mixing drum motor as reference to evaluate the concrete mixing uniformity degree in the production process, and the empirical method is based on data and develops evaluation behaviors by depending on the experience of operators, gives consideration to qualitative and quantitative properties, and takes qualitative evaluation as a main idea.
Disclosure of Invention
Aiming at the defects in the prior art, the technical problems to be solved by the invention are as follows: the real-time monitoring equipment and the method for the concrete plastic viscosity are provided by taking the plastic viscosity coefficient in the concrete rheological index as a core evaluation index, based on stress data detected by an intelligent stirring blade in the concrete stirring process and through a stress-power-plastic viscosity correlation mechanism.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
a concrete plastic viscosity real-time monitoring device comprises: the concrete plastic viscosity intelligent stirring device comprises an intelligent stirring blade 1, a concrete plastic viscosity calculation terminal 6, a stirring barrel 9, a stirring blade 10, a stirring shaft 11 and a stirring rod;
the intelligent stirring blade 1 comprises: the stress sensor 2, the intelligent stirring blade shell 3, the stress data wireless transmitter 4 and the intelligent stirring blade mounting interface 5;
stress sensor 2 and stress data wireless transmitter 4 install on intelligent stirring vane casing 3, and stress sensor 2 and stress data wireless transmitter 4 are connected, stress sensor 2 is used for: detecting stress data and sending the detected stress data to a stress data wireless transmitter 4; the stress data wireless transmitter 4 is configured to: transmitting the received stress data to a concrete plastic viscosity calculation terminal 6;
a stirring shaft 11 is arranged in the stirring barrel 9, a stirring rod is connected to the stirring shaft 11, and a stirring blade 10 or an intelligent stirring blade 1 is connected to the end part of the stirring rod;
the one end of intelligence stirring vane casing 3 is provided with intelligent stirring vane installation interface 5, and intelligent stirring vane installation interface 5 is used for: is connected with the stirring rod;
the concrete plastic viscosity calculation terminal 6 includes: the concrete plastic viscosity calculation terminal comprises a concrete plastic viscosity calculation terminal shell 7, a terminal display screen 8 and a processor;
the terminal display screen 8 and the processor are arranged in the concrete plastic viscosity calculation terminal shell 7, the processor is connected with the terminal display screen 8, and the processor is used for: calculating the real-time plastic viscosity result of the fresh concrete in the mixing tank 9 in real time by the received stress data through a conversion algorithm of stress-power-plastic viscosity;
the terminal display screen 8 is used for: and displaying real-time plastic viscosity results.
On the basis of the scheme, the number of the intelligent stirring blades 1 is 1.
On the basis of the scheme, the conversion algorithm of the stress-power-plastic viscosity is specifically expressed as follows:
P＝Fv＝Fnd
Re＝ρnd2/μ
in the formula: p represents power in W; rho represents the density of fresh concrete in kg/m3(ii) a n represents the rotation speed of the stirring shaft in rpm; d represents the diameter of the stirrer and is m; re represents a Reynolds number; b represents the width of the stirring blade in m; h represents the depth of the liquid layer and is expressed in m; d representsThe inner diameter of the stirring barrel is m; theta represents the folding angle of the blade in degrees; f represents the stress unit of the intelligent stirring blade is N; v represents the linear velocity of the intelligent stirring blade in m/s.
The concrete plastic viscosity real-time monitoring method applies the concrete plastic viscosity real-time monitoring equipment, and specifically comprises the following steps:
step 1: replacing the intelligent stirring blade 1 with the stirring blade 10;
step 2: the stirring barrel 9 is started to operate, and the concrete plastic viscosity calculation terminal 6 is started simultaneously;
and step 3: the stress sensor 2 on the intelligent stirring blade 1 starts to record stress;
and 4, step 4: the motor of the stirring barrel 9 runs until the current is stable;
and 5: the stress data wireless transmitter 4 on the intelligent stirring blade 1 transmits the stress data to the concrete plastic viscosity calculation terminal 6;
step 6: and a processor in the concrete plastic viscosity calculation terminal 6 calculates a real-time plastic viscosity result of the fresh concrete in the mixing tank 9 in real time by using the stress data based on a conversion algorithm of stress-power-plastic viscosity, and displays the real-time plastic viscosity result through a terminal display screen 8.
On the basis of the scheme, the number of the intelligent stirring blades 1 is 1.
On the basis of the scheme, the conversion algorithm of the stress-power-plastic viscosity is specifically expressed as follows:
P＝Fv＝Fnd
Re＝ρnd2/μ
in the formula: p represents power in W; rho represents the density of fresh concrete in kg/m3(ii) a n represents the rotation speed of the stirring shaft in rpm; d represents the diameter of the stirrer and is m; re represents a Reynolds number; b represents the width of the stirring blade in m; h represents the depth of the liquid layer and is expressed in m; d represents a mixing tankInner diameter in m; theta represents the folding angle of the blade in degrees; f represents the stress unit of the intelligent stirring blade is N; v represents the linear velocity of the intelligent stirring blade in m/s.
The invention has the beneficial effects that:
the invention provides a new quantitative index for quality control and dynamic regulation and control in the concrete production process by matching equipment such as intelligent stirring blades, data wireless transmission equipment and the like based on the conversion algorithm of stress-power-plastic viscosity between the stirring blades and fresh concrete in the independently developed concrete stirring equipment, realizes the real-time monitoring of the concrete quality based on the plastic viscosity data in the concrete production process, is beneficial to improving the yield of the concrete and reduces the waste of building raw materials.
The invention provides a device and a method for monitoring the plastic viscosity in real time in the stirring process of a concrete stirring station.
Drawings
The invention has the following drawings:
FIG. 1 is a concrete plastic viscosity real-time monitoring device and method operation flow chart
FIG. 2 is a schematic structural diagram of a concrete plastic viscosity real-time monitoring device
FIG. 3 is a schematic structural diagram of a concrete plastic viscosity real-time monitoring device
FIG. 4 is a diagram of the installation position of a concrete plastic viscosity real-time monitoring device
Reference numerals:
1 intelligent stirring blade 2 stress sensor
3 intelligent stirring blade shell 4 stress data wireless transmitter
5 intelligent mixing blade installation interface 6 concrete plastic viscosity calculation terminal
7 concrete plastic viscosity calculation terminal shell 8 terminal display screen
9 stirring barrel 10 stirring blade
11 stirring shaft
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings 1 to 4.
A concrete plastic viscosity real-time monitoring device comprises: the concrete plastic viscosity intelligent stirring device comprises an intelligent stirring blade 1, a concrete plastic viscosity calculation terminal 6, a stirring barrel 9, a stirring blade 10, a stirring shaft 11 and a stirring rod;
the intelligent stirring blade 1 comprises: the stress sensor 2, the intelligent stirring blade shell 3, the stress data wireless transmitter 4 and the intelligent stirring blade mounting interface 5;
stress sensor 2 and stress data wireless transmitter 4 install on intelligent stirring vane casing 3, and stress sensor 2 and stress data wireless transmitter 4 are connected, stress sensor 2 is used for: detecting stress data and sending the detected stress data to a stress data wireless transmitter 4; the stress data wireless transmitter 4 is configured to: transmitting the received stress data to a concrete plastic viscosity calculation terminal 6;
a stirring shaft 11 is arranged in the stirring barrel 9, a stirring rod is connected to the stirring shaft 11, and a stirring blade 10 or an intelligent stirring blade 1 is connected to the end part of the stirring rod;
the one end of intelligence stirring vane casing 3 is provided with intelligent stirring vane installation interface 5, and intelligent stirring vane installation interface 5 is used for: is connected with the stirring rod;
the concrete plastic viscosity calculation terminal 6 includes: the concrete plastic viscosity calculation terminal comprises a concrete plastic viscosity calculation terminal shell 7, a terminal display screen 8 and a processor;
the terminal display screen 8 and the processor are arranged in the concrete plastic viscosity calculation terminal shell 7, the processor is connected with the terminal display screen 8, and the processor is used for: calculating the real-time plastic viscosity result of the fresh concrete in the mixing tank 9 in real time by the received stress data through a conversion algorithm of stress-power-plastic viscosity;
the terminal display screen 8 is used for: and displaying real-time plastic viscosity results.
On the basis of the scheme, the number of the intelligent stirring blades 1 is 1.
On the basis of the scheme, the conversion algorithm of the stress-power-plastic viscosity is specifically expressed as follows:
P＝Fv＝Fnd
Re＝ρnd2/μ
in the formula: p represents power in W; rho represents the density of fresh concrete in kg/m3(ii) a n represents the rotation speed of the stirring shaft in rpm; d represents the diameter of the stirrer and is m; re represents a Reynolds number; b represents the width of the stirring blade in m; h represents the depth of the liquid layer and is expressed in m; d represents the inner diameter of the stirring barrel and is in m; theta represents the folding angle of the blade in degrees; f represents the stress unit of the intelligent stirring blade is N; v represents the linear velocity of the intelligent stirring blade in m/s.
The concrete plastic viscosity real-time monitoring method applies the concrete plastic viscosity real-time monitoring equipment, and comprises the following concrete steps:
step 1: replacing the intelligent stirring blade 1 with the stirring blade 10;
step 2: the stirring barrel 9 is started to operate, and the concrete plastic viscosity calculation terminal 6 is started simultaneously;
and step 3: the stress sensor 2 on the intelligent stirring blade 1 starts to record stress;
and 4, step 4: the motor of the stirring barrel 9 runs until the current is stable;
and 5: the stress data wireless transmitter 4 on the intelligent stirring blade 1 transmits the stress data to the concrete plastic viscosity calculation terminal 6;
step 6: and a processor in the concrete plastic viscosity calculation terminal 6 calculates a real-time plastic viscosity result of the fresh concrete in the mixing tank 9 in real time by using the stress data based on a conversion algorithm of stress-power-plastic viscosity, and displays the real-time plastic viscosity result through a terminal display screen 8.
On the basis of the scheme, the number of the intelligent stirring blades 1 is 1.
On the basis of the scheme, the conversion algorithm of the stress-power-plastic viscosity is specifically expressed as follows:
P＝Fv＝Fnd
Re＝ρnd2/μ
in the formula: p represents power in W; rho represents the density of fresh concrete in kg/m3(ii) a n represents the rotation speed of the stirring shaft in rpm; d represents the diameter of the stirrer and is m; re represents a Reynolds number; b represents the width of the stirring blade in m; h represents the depth of the liquid layer and is expressed in m; d represents the inner diameter of the stirring barrel and is in m; theta represents the folding angle of the blade in degrees; f represents the stress unit of the intelligent stirring blade is N; v represents the linear velocity of the intelligent stirring blade in m/s.
Those not described in detail in this specification are within the skill of the art.
Claims (6)
1. The utility model provides a concrete plastic viscosity real-time supervision equipment which characterized in that: the method comprises the following steps: the concrete plastic viscosity monitoring device comprises an intelligent stirring blade (1), a concrete plastic viscosity calculating terminal (6), a stirring barrel (9), a stirring blade (10), a stirring shaft (11) and a stirring rod;
the intelligent stirring blade (1) comprises: the stress sensor (2), the intelligent stirring blade shell (3), the stress data wireless transmitter (4) and the intelligent stirring blade mounting interface (5);
the stress sensor (2) and the stress data wireless transmitter (4) are arranged on the intelligent stirring blade shell (3), the stress sensor (2) and the stress data wireless transmitter (4) are connected,
the stress sensor (2) is configured to: detecting stress data and sending the detected stress data to a stress data wireless transmitter (4);
the stress data wireless transmitter (4) is configured to: transmitting the received stress data to a concrete plastic viscosity calculation terminal (6);
a stirring shaft (11) is arranged in the stirring barrel (9), a stirring rod is connected to the stirring shaft (11), and a stirring blade (10) or an intelligent stirring blade (1) is connected to the end part of the stirring rod;
the one end of intelligence stirring vane casing (3) is provided with intelligence stirring vane installation interface (5), and intelligence stirring vane installation interface (5) are used for: is connected with the stirring rod;
the concrete plastic viscosity calculation terminal (6) includes: the concrete plastic viscosity calculation terminal comprises a concrete plastic viscosity calculation terminal shell (7), a terminal display screen (8) and a processor;
the terminal display screen (8) and the processor are arranged inside the concrete plastic viscosity calculation terminal shell (7), the processor is connected with the terminal display screen (8),
the processor is configured to: calculating the real-time plastic viscosity result of the fresh concrete in the mixing tank (9) in real time by the received stress data through a stress-power-plastic viscosity conversion algorithm;
the terminal display screen (8) is used for: and displaying real-time plastic viscosity results.
2. The concrete plastic viscosity real-time monitoring device of claim 1, wherein: the number of the intelligent stirring blades (1) is 1.
3. The concrete plastic viscosity real-time monitoring device of claim 1, wherein the stress-power-plastic viscosity conversion algorithm is specifically expressed as:
P＝Fv＝Fnd
Re＝ρnd2/μ
in the formula: p represents power in W; rho meterShowing the density of fresh concrete in kg/m3(ii) a n represents the rotation speed of the stirring shaft in rpm; d represents the diameter of the stirrer and is m; re represents a Reynolds number; b represents the width of the stirring blade in m; h represents the depth of the liquid layer and is expressed in m; d represents the inner diameter of the stirring barrel and is in m; theta represents the folding angle of the blade in degrees; f represents the stress unit of the intelligent stirring blade is N; v represents the linear velocity of the intelligent stirring blade in m/s.
4. The concrete plastic viscosity real-time monitoring method is applied to the concrete plastic viscosity real-time monitoring equipment as claimed in any one of claims 1 to 3, and is characterized by comprising the following steps of:
step 1: replacing the intelligent stirring blade (1) with the stirring blade (10);
step 2: the mixing tank (9) is started to operate, and the concrete plastic viscosity calculation terminal (6) is started simultaneously;
and step 3: a stress sensor (2) on the intelligent stirring blade (1) starts to record stress;
and 4, step 4: the motor of the stirring barrel (9) runs until the current is stable;
and 5: stress data are transmitted to a concrete plastic viscosity calculation terminal (6) by a stress data wireless transmitter (4) on the intelligent stirring blade (1);
step 6: and a processor in the concrete plastic viscosity calculation terminal (6) calculates a real-time plastic viscosity result of the fresh concrete in the mixing tank (9) in real time by using the stress data based on a conversion algorithm of stress-power-plastic viscosity, and displays the real-time plastic viscosity result through a terminal display screen (8).
5. The concrete plastic viscosity real-time monitoring method according to claim 4, characterized in that the number of the intelligent stirring blades (1) is 1.
6. The method for real-time monitoring of concrete plastic viscosity according to claim 4, wherein the conversion algorithm of stress-power-plastic viscosity is specifically expressed as:
P＝Fv＝Fnd
Re＝ρnd2/μ
in the formula: p represents power in W; rho represents the density of fresh concrete in kg/m3(ii) a n represents the rotation speed of the stirring shaft in rpm; d represents the diameter of the stirrer and is m; re represents a Reynolds number; b represents the width of the stirring blade in m; h represents the depth of the liquid layer and is expressed in m; d represents the inner diameter of the stirring barrel and is in m; theta represents the folding angle of the blade in degrees; f represents the stress unit of the intelligent stirring blade is N; v represents the linear velocity of the intelligent stirring blade in m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011166598.3A CN112454656B (en) | 2020-10-27 | 2020-10-27 | Concrete plastic viscosity real-time monitoring equipment and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011166598.3A CN112454656B (en) | 2020-10-27 | 2020-10-27 | Concrete plastic viscosity real-time monitoring equipment and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112454656A true CN112454656A (en) | 2021-03-09 |
| CN112454656B CN112454656B (en) | 2021-09-21 |
Family
ID=74835941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011166598.3A Active CN112454656B (en) | 2020-10-27 | 2020-10-27 | Concrete plastic viscosity real-time monitoring equipment and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112454656B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113442295A (en) * | 2021-07-08 | 2021-09-28 | 新汶矿业集团设计研究院有限公司 | Slurry making and preparing system and method suitable for large horizontal sand silo of mine filling station |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080060423A1 (en) * | 2006-04-29 | 2008-03-13 | Wen-Chen Jau | Measurements of yield stress and plastic viscosity of cement-based materials via concrete rheometer |
| CN201397283Y (en) * | 2009-05-15 | 2010-02-03 | 河海大学 | Construction site concrete rheology behavior dynamic inspection device |
| CN201497692U (en) * | 2009-07-10 | 2010-06-02 | 天津市建筑科学研究院 | Numerically controlled intelligent tester of concrete viscosity |
| CN204128921U (en) * | 2014-10-21 | 2015-01-28 | 上海建工材料工程有限公司 | A kind of concrete viscosity stirs testing apparatus |
| CN104502234A (en) * | 2014-12-27 | 2015-04-08 | 长安大学 | Concrete workability testing device and concrete workability testing method |
| CN104614289A (en) * | 2015-02-06 | 2015-05-13 | 河海大学常州校区 | Concrete viscosity monitoring system |
| CN111015956A (en) * | 2019-11-29 | 2020-04-17 | 上海建工集团股份有限公司 | Fresh-mixed high-performance concrete rheological property control method and device |
| US20200173899A1 (en) * | 2017-08-22 | 2020-06-04 | Cidra Corporate Services Llc | Techniques for sensing the volume and/or viscosity of concrete in a rotating container |
-
2020
- 2020-10-27 CN CN202011166598.3A patent/CN112454656B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080060423A1 (en) * | 2006-04-29 | 2008-03-13 | Wen-Chen Jau | Measurements of yield stress and plastic viscosity of cement-based materials via concrete rheometer |
| CN201397283Y (en) * | 2009-05-15 | 2010-02-03 | 河海大学 | Construction site concrete rheology behavior dynamic inspection device |
| CN201497692U (en) * | 2009-07-10 | 2010-06-02 | 天津市建筑科学研究院 | Numerically controlled intelligent tester of concrete viscosity |
| CN204128921U (en) * | 2014-10-21 | 2015-01-28 | 上海建工材料工程有限公司 | A kind of concrete viscosity stirs testing apparatus |
| CN104502234A (en) * | 2014-12-27 | 2015-04-08 | 长安大学 | Concrete workability testing device and concrete workability testing method |
| CN104614289A (en) * | 2015-02-06 | 2015-05-13 | 河海大学常州校区 | Concrete viscosity monitoring system |
| US20200173899A1 (en) * | 2017-08-22 | 2020-06-04 | Cidra Corporate Services Llc | Techniques for sensing the volume and/or viscosity of concrete in a rotating container |
| CN111015956A (en) * | 2019-11-29 | 2020-04-17 | 上海建工集团股份有限公司 | Fresh-mixed high-performance concrete rheological property control method and device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113442295A (en) * | 2021-07-08 | 2021-09-28 | 新汶矿业集团设计研究院有限公司 | Slurry making and preparing system and method suitable for large horizontal sand silo of mine filling station |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112454656B (en) | 2021-09-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112454656B (en) | Concrete plastic viscosity real-time monitoring equipment and method | |
| Domone et al. | Developments of the two-point workability test for high-performance concrete | |
| CN109781338A (en) | Concrete pumping monitors system and method | |
| CN106840968A (en) | The on-line Full method of testing of rheological parameters of fresh mixed concrete | |
| CN103133381A (en) | Automatic frequency modulation control method of ventilator and device thereof | |
| CN108107931B (en) | Method and system for controlling mixing quality of mixture | |
| CN109975529A (en) | Slump automatic monitoring method and system in concrete production | |
| CN111958832A (en) | Concrete workability monitoring equipment and method applied to concrete mixing plant | |
| CN202895470U (en) | Slurry agitator and real-time slurry monitoring system | |
| CN109676796B (en) | Concrete mixer rheological property monitoring method | |
| CN114236056A (en) | Lime neutralization pH value measuring equipment and method | |
| CN115260853B (en) | Production process and production equipment of environment-friendly water-based coil steel coating | |
| CN207901416U (en) | A kind of agitating device for sealing material in permeability test | |
| CN210651388U (en) | Constant-temperature stirring device for raw materials of artificial quartz stone plates | |
| CN212915224U (en) | Fluid building raw material production equipment with quality monitoring function | |
| CN215150498U (en) | Concrete mixing plant control system | |
| CN115754150A (en) | Mixing uniformity measuring device and method suitable for viscous solid waste curing construction | |
| CN211189859U (en) | Automatic grouting and stirring system | |
| CN208792096U (en) | A kind of road engineering asphalt mortar, bituminous mortar stirring smart machine | |
| CN207537850U (en) | A kind of asphalt trucd mixer intelligent Remote Control System | |
| CN205308172U (en) | Energy -conserving automatic control heat preservation pitch mixer | |
| CN104385463A (en) | Wireless measurement and control system for stirring equipment | |
| CN112454661A (en) | Special concrete production device and process capable of achieving rapid solidification | |
| CN111024773A (en) | Developer solution concentration measuring device | |
| CN111553585A (en) | System and method for monitoring mixing quality of core wall asphalt mixture in real time |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |