CN114878747B - Gel material dosage determination method - Google Patents
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- 239000000463 material Substances 0.000 title claims abstract description 135
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 claims abstract description 47
- 239000000203 mixture Substances 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000005070 sampling Methods 0.000 claims abstract description 4
- 239000004568 cement Substances 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 9
- 238000004364 calculation method Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 7
- 238000005303 weighing Methods 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 2
- 241001640034 Heteropterys Species 0.000 claims 2
- 230000001419 dependent effect Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 claims 1
- BULVZWIRKLYCBC-UHFFFAOYSA-N phorate Chemical compound CCOP(=S)(OCC)SCSCC BULVZWIRKLYCBC-UHFFFAOYSA-N 0.000 claims 1
- 239000002910 solid waste Substances 0.000 abstract description 11
- 238000004448 titration Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000000691 measurement method Methods 0.000 abstract description 2
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention belongs to the technical field of dosage measurement methods, and particularly relates to a gel material dosage determination method. The method comprises the following specific steps: preparing in the early stage; pre-calibrating the dosage of the cementing material, and detecting the water content of aggregate sampling; calibrating and adjusting the cementing material in the production process; determining the dosage of the cementing material; and (5) detecting the water content of the mixture, and rechecking the dosage of the mixture cementing material. The method is simple, convenient and quick, has stronger timeliness and further improves the working efficiency and the working quality. The dosage of the cementing material in the mixture produced by the water-stable mixing station can be measured, and the method is particularly suitable for solid waste-based cementing material stabilized macadam mixtures in which the dosage of the cementing material cannot be accurately determined by a titration method, and is beneficial to popularization and application of the solid waste-based cementing material.
Description
Technical Field
The invention belongs to the technical field of dosage measurement methods, and particularly relates to a gel material dosage determination method.
Background
The accurate determination of the dosage of the cementing material has very important guiding significance for the construction of the highway engineering foundation. The current domestic engineering cement or lime dosage determination method mainly adopts a specified method of JTG E51-2009, "Highway engineering inorganic binder stable materials test procedure" T0809-2009, takes about 20 minutes from material taking to titration completion according to test operation, and has certain delay when discharging 180T is completed in the process of waiting for titration results according to time of 540T/h. Moreover, along with the national reinforcing environmental protection requirement, the recycling of the solid waste materials is advocated, and the research and the application of the solid waste-based cementing material such as the spring bamboo shoots after rain are all over the country. In engineering practice, a great difficulty in restricting the popularization and application of the solid waste-based cementing material is that a quick and effective method cannot be found to determine the dosage of the cementing material.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method for determining the dosage of a cementing material in a mixture discharged from a water-stable mixing station, and particularly relates to a stable granular material which is similar to solid waste-based cementing materials, red mud-based cementing materials and the like and can not accurately determine the dosage of the cementing material through a titration method. The method is simple, convenient and quick, can detect the dosage of the cementing material in the mixture in real time, can find out the deviation of the result in time, is convenient for correcting the deviation of the cementing material of the mixture in time, and achieves the effect of ensuring the grading control of the mixture.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a gel material dosage determining method comprises the following specific steps:
(1) Early preparation:
before construction, calibrating each hopper of the mixing station and a cementing material weighing system, ensuring the accuracy of the weighing system, calibrating the flow of each grade of aggregate, and determining the production mixing proportion of the mixture through experiments.
(2) Prestarding the dosage of the cementing material:
the gel material dosage calibration is at least calibrated to 3 points, the full scale range of the gel material feeding frequency converter of the mixing station is f, and at least three points of 0.2f,0.4f and 0.6f are required to be calibrated;
firstly, setting the frequency of a cementing material to 0.2f, starting a cementing material feeding system to discharge, starting timing at the same time, and receiving materials at a discharge port by using a woven bag;
stopping the discharging of the cementing material, stopping timing at the same time, and reading the time t 1 (according to the engineering tested discharge time t) 1 Not less than 10 s), weigh the weight m of the cementing material j (kg) according to formula y 1 ＝(m j /t 1 ) 3600/1000, calculating the cement supply y corresponding to the 0.2f frequency 1 (t/h)；
Calibrating and calculating the cementing material flow y corresponding to 0.4f according to the same operation mode 2 (t/h), cement flow y corresponding to 0.6f 3 (t/h)；
With 0.2f,0.4f and 0.6f as the abscissa, the corresponding y 1 、y 2 、y 3 On the ordinate, a relation graph of the cementing material frequency and the cementing material supply amount is drawn, and a fitting curve y=a of the graph is drawn 1 x+b 1 。
(3) Aggregate sampling water content detection:
the method comprises the steps of replacing a table sample for each grade of aggregate in a mixing station stock ground, and detecting the water content according to relevant regulations of highway engineering aggregate test regulations (JTG E42-2005);
taking the conventional four-grade aggregate of 20-30 mm, 10-20 mm, 5-10 mm and 0-5 mm as examples (the same applies below), recording and measuring the water content results to be omega respectively 1 、ω 2 、ω 3 、ω 4 ；
(4) Aggregate proportion of each grade:
according to related regulations of highway pavement basic construction technical rules (JTG/T F20-2015), the mixture proportion is designed;
the non-water mass percentages of the aggregates of each grade are determined to be p respectively 1 :p 2 :p 3 :p 4 (wherein p 1 +p 2+ p 3+ p 4 ＝100％)。
(5) And (3) adjusting the metering frequency of the cementing material in the production process:
in the formal production, when the mixing station sets the hourly production amount as T 1 (T/h), wherein T 1 The weight of the aggregate (water-containing weight) of the fourth grade and the weight of the cementing material are included;
assuming the production mix ratio to determine the mixture gel material dosage as e 1 (%) at this time, the cement was added in an amount of
According to the fitting curve determined in the operation (3), calculating the cementing material asAt the time, the cementing material production frequency f of the mixing station 1 ；
Will f 1 As an initial setting frequency of the cementing material during production;
in the production process, in order to ensure the calculation accuracy and timeliness, the dosage of the cementing material is calculated once every 2 vehicles;
reading the weight of each aggregate at the moment by using a mixing station operating system screen, wherein the weight of each aggregate is 20-30 mm and is m 12 10-20 mm is m 22 5-10 mm is m 32 0-5 mm is m 42 Weight m of cementing material j2 ；
Wherein m is 12 1 in the subscript represents stone specification of 20-30 mm, 2 in the subscript represents the number of discharge cars of the mixture, and so on 22 、m 32 、m 42 The meaning of the subscript;
due to m 12 、m 22 、m 32 、m 42 The water content of each grade of aggregate is included, and the water content needs to be deducted when the dosage of the cementing material is calculated. After deducting the water mass, the total weight of the aggregateAccording to e 2 ＝m j2 /M Total 2 100 calculating the cement dosage e of the mixture of the first two vehicles 2 ；
Comparative e 2 And e 1 Value:
(1) if the difference value of the two is not more than +/-0.1, continuously detecting the dosage of the cementing material of other vehicles according to the step 4.
(2) If the difference exceeds + -0.1, then the method is as followsRecalculating the production frequency of the cementing material of the mixing station;
setting the setting value of the cementing material production frequency of the mixing station from f 1 Change to f 2 ；
Repeating the operation (5) until the cementing material production frequency f of the mixing station n In the process, the detection value of the cementing material of the corresponding mixtureWherein the subscript n represents the nth calculation, M Total 2n 、M Total 2 (n-1) The calculation procedure is described in operation (5) M Total 2 Is calculated by the computer.
Determining the dosage of the cementing material:
continuously checking the cementing material production frequency determined by the operation (5) according to the operation (5); up to the production frequency f n Corresponding detection value e n 、e n+1 、e n+2 The continuous 3 times result satisfies e 1 Until + -0.1, at this time, the production frequency f is determined n The corresponding gel material dosage is e 1 。
Advantageous effects
The invention discloses a gel material dosage determining method, which has the beneficial effects that: the method is simple, convenient and quick, has stronger timeliness and further improves the working efficiency and the working quality. The dosage of the cementing material in the mixture produced by the water-stable mixing station can be measured, and the method is particularly suitable for solid waste-based cementing material stabilized macadam mixtures in which the dosage of the cementing material cannot be accurately determined by a titration method, and is favorable for popularization and application of the solid waste-based cementing material.
Drawings
Fig. 1: gel frequency versus gel supply.
Detailed Description
Hereinafter, the present invention will be described in detail. Before the description, it is to be understood that the terms used in this specification and the appended claims should not be construed as limited to general and dictionary meanings, but interpreted based on the meanings and concepts corresponding to technical aspects of the present invention on the basis of the principle that the inventor is allowed to define terms appropriately for the best explanation. Accordingly, the description set forth herein is merely a preferred example for the purpose of illustration and is not intended to limit the scope of the invention, so that it should be understood that other equivalents or modifications may be made thereto without departing from the spirit and scope of the invention.
The following examples are merely illustrative of embodiments of the present invention and are not intended to limit the invention in any way, and those skilled in the art will appreciate that modifications may be made without departing from the spirit and scope of the invention. Unless otherwise specified, reagents and equipment used in the following examples are commercially available products.
Example 1
A gel material dosage determining method comprises the following specific steps:
(1) Early preparation:
before construction, calibrating 4 hoppers and cementing material weighing systems used for production, calibrating flow of each grade of aggregate blanking belt, and proportioning and designing solid waste-based cementing material stabilized macadam;
(2) Prestarding the dosage of the cementing material:
the adopted square and round 800-type water-stable mixing station has the cementing material metering full frequency f of 50Hz, and the frequencies of 10Hz, 20Hz and 30Hz are respectively calibrated according to the requirements;
setting the metering frequency of the cementing material to be 10Hz, starting a cementing material feeding system to start discharging, starting timing at the same time, and receiving materials at a cementing material discharging port by using a woven bag;
closing the cementing material discharging system andstopping timing, reading 15.94s, and weighing 77.535kg of receiving materials; according to formula y 1 = (77.535/15.94) 3600/1000= 17.511t/h, calculating the frequency 10Hz corresponding to the cement supply of 17.511 (t/h);
according to the operation mode, the gel material supply quantity corresponding to the frequency of 20Hz is calculated to be 27.9895 (t/h) and the gel material supply quantity corresponding to the frequency of 30Hz is calculated to be 35.542 (t/h)
Drawing a gel material frequency-gel material supply amount relation chart (shown in the following figure 1) by taking 10Hz, 20Hz and 30Hz as abscissa and corresponding gel material supply amounts 17.511t/h, 27.9895t/h and 35.542t/h as ordinate, and making a graph fitting curve equation as y=0.901x+8.951;
(3) Aggregate sampling water content detection:
four-grade aggregates of 20-30 mm, 10-20 mm, 5-10 mm and 0-5 mm adopted by the mixture are subjected to water content detection according to related regulations of highway engineering aggregate test procedure (JTG E42-2005);
the water content of the four-gear aggregate is 0.3%, 0.5%, 0.6% and 1.3% respectively;
(4) Aggregate proportion of each grade:
according to related regulations of highway pavement basic construction technical rules (JTG/T F20-2015), the mixture proportion is designed;
the non-water mass percentages of the aggregates of each grade are determined to be 18:38:15:29 respectively.
(5) And (3) adjusting the metering frequency of the cementing material in the production process:
the mixing station is set to have 480 (t/h) of output per hour, wherein 480t/h comprises the weight of the fourth-grade aggregate (water-containing weight) and the weight of the cementing material;
the production mixing ratio determines that the dosage of the cementing material of the mixture is 5.5 percent, and the mixing amount of the cementing material per hour is
According to the fitted curve determined in the step (3), when the cementing material is 24.856t/h, the cementing material production frequency f= (24.856-8.951)/0.901=17.65 Hz of the mixing station is calculated;
when 17.65Hz is used as production, the initial setting frequency of the cementing material is set;
in the production process, in order to ensure the calculation accuracy and timeliness, the dosage of the cementing material is calculated once every 2 vehicles;
reading the weight of aggregate of each grade at the moment by using a mixing station operating system screen, wherein the weight of aggregate is 20-30 mm and is 18.617t, the weight of aggregate is 39.302t, the weight of aggregate is 5-10 mm and is 15.514t, the weight of aggregate is 0-5 mm and is 29.994t, and the weight of cementing material is 5.273t;
because of the water content of each aggregate, the water content needs to be subtracted when calculating the binder dosage. After deducting the water mass, the total weight of the aggregate
According to e 2 = 5.273 ++ 102.697 ×100=5.1%, and the cement dosage of the first two vehicles is calculated to be 5.1%;
comparing 5.1 to more than 5.5 + -0.1;
the difference value between the two is more than +/-0.1 according toRecalculating the production frequency of the cementing material of the mixing station;
changing the set value of the cementing material production frequency of the mixing station from 17.65Hz to 19.03Hz;
repeating the step (5), and when the production frequency of the cementing material is 19.03Hz, detecting the cementing material by the 3 rd vehicle and the 4 th vehicle mixture
Comparing 5.9 to more than 5.5 + -0.1;
the difference value between the two is more than +/-0.1 according toRecalculating the production frequency of the cementing material of the mixing station;
changing the set value of the cementing material production frequency of the mixing station from 19.03Hz to 18.69Hz;
repeating the step (5), and when the production frequency of the cementing material is 18.69Hz, detecting the cementing material by the 5 th and 6 th vehicle mixtures
Comparing 5.5 to not more than 5.5 + -0.1;
the production frequency of the cementing material is 18.69Hz, the detection values of the cementing material of the mixture of the 7 th car, the 8 th car, the 9 th car and the 10 th car are continuously detected and calculated, and e is obtained by calculation 4 ＝5.6％、e 5 ＝5.4％；
The result e is measured three times continuously at the production frequency of the cementing material of 18.69Hz 3 、e 4 、e 5 Meets the range requirement of 5.5+/-0.1 of the production ratio;
the production rate of the mixture is 480t/h when the mixture is stirred, and the production frequency of the cementing material is set to 18.69Hz when the dosage of the cementing material is 5.5%.
The method is simple, convenient and quick, has stronger timeliness and further improves the working efficiency and the working quality. The dosage of the cementing material in the mixture produced by the water-stable mixing station can be measured, and the method is particularly suitable for solid waste-based cementing material stabilized macadam mixtures in which the dosage of the cementing material cannot be accurately determined by a titration method, and is favorable for popularization and application of the solid waste-based cementing material.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (2)
1. A method of determining a dosage of a binder comprising the steps of:
(1) Early preparation: before construction, calibrating each hopper and a cementing material weighing system of the mixing station, ensuring the accuracy of the weighing system, calibrating the flow of each grade of aggregate, and determining the production mixing proportion of the mixture through a test;
(2) Prestarding the dosage of the cementing material: at least 3 points are calibrated by gel material dosage calibration, and the full range of a gel material feeding frequency converter of the mixing station isfAt least to 0.2f，0.4f，0.6fCalibrating the three points;
(3) Aggregate sampling water content detection: four-grade aggregates of 20-30 mm, 10-20 mm, 5-10 mm and 0-5 mm adopted by the mixture are subjected to water content detection according to the relevant regulations of JTG E42-2005 'highway engineering aggregate test rules', and the water content results are recorded as omega 1 、ω 2 、ω 3 、ω 4 ；
(4) Determining the aggregate proportion of each grade;
(5) Adjusting the dosage frequency of the gel material in the production process;
(6) Determining the dosage of the cementing material;
the concrete method for precalibrating the dosage of the cementing material comprises the following steps:
first, the mixing station gel material feed inverter was set to 0.2fStarting a cementing material feeding system for discharging, starting timing at the same time, and receiving materials at a discharging port by using a woven bag; stopping discharging the cementing material, stopping timing at the same time, and reading discharging timet 1 ，t 1 In s, weigh the weight of the cement placedm j ，m j In kg, according to the formulay 1 = (m j /t 1 ) 3600/1000, calculate 0.2fFrequency dependent gel material dosagey 1 ，y 1 Is expressed in tons per hour;
calculate 0.4 in the same manner of operationfCorresponding gel material dosagey 2 ，y 2 In ton per hour, 0.6fCorresponding gel material dosagey 3 ，y 3 Is expressed in tons per hour;
at 0.2f、0.4f、0.6fIn the abscissa, corresponding toy 1 、y 2 、y 3 Drawing a gel material frequency-gel material dosage relation graph as an ordinate, and making a fitting curve of the graphy=a 1 x+b 1 ；
In the step (5), the method for adjusting the dosage frequency of the gel material in the production process comprises the following steps:
in the formal production, when the mixing station is set to have the hourly yield ofT 1 ，T 1 In units of tons per hour,T 1 the weight of the cement and the weight of the cement comprise four grades of aggregate, and the cement dosage of the mixture is determined by assuming the production mix ratioe 1 ，e 1 In% in which case the gel material dosage isWherein, the method comprises the steps of, wherein,p 1 、p 2 、 p 3 、 p 4 the weight percentage of the non-water content of the four-grade aggregate is 20-30 mm, 10-20 mm, 5-10 mm and 0-5 mm respectively,p 1 + p 2 +p 3 + p 4 =100%；
calculating the gel material dosage as follows according to the fitting curve determined in the step (2)At the time, the cementing material production frequency of the mixing stationf 1 Will bef 1 As an initial set frequency for the cement at the time of production;
in the production process, the dosage of the cementing material is calculated every 2 vehicles, and the weight of each grade of aggregate is 20-30 mm when the screen reading of the mixing station operating system is performedm 12 10-20 mm ofm 22 5-10 mm ofm 32 0-5 mmm 42 Weight of the cementing materialWhereinm 12 1 in the subscript represents stone specification of 20-30 mm, and 2 in the subscript represents mixtureNumber of discharge cars, and the likem 22 、m 32 、m 42 The meaning of the subscript;
due tom 12 、m 22 、m 32 、m 42 Comprises the water content of each grade of aggregate, the water content needs to be deducted when the dosage of the cementing material is calculated, and the total weight of the aggregate is deducted after the water content is deductedAccording to->Calculating the dosage of the cementing material of the mixture of the first two vehiclese 2 Comparison ofe 2 And (3) withe 1 A value, determining the next operation according to the difference value of the value and the value;
the comparisone 2 And (3) withe 1 The difference result of the values includes:
if the difference value of the two is not more than +/-0.1, the cementing material production frequency of the mixing stationf n Is thatf 1 ；
If the difference exceeds + -0.1, then the method is as followsRecalculating the production frequency of the cementing material of the mixing station;
the recalculation method comprises the following steps: setting the production frequency of cementing material of a mixing station fromf 1 Instead off 2 The method comprises the steps of carrying out a first treatment on the surface of the Then, repeating the operation of the step (5) until the production frequency of the cementing material of the mixing station isf n Corresponding to the dosage of the gel materialNo more thane 1 Stopping repeating the step (5) when + -0.1, wherein the subscriptsnRepresents the firstnCalculation of->、/>For calculation see step (5)>Is calculated according to the calculation process of (1);
in the step (6), the specific method for determining the dosage of the cementing material is as follows: continuously checking the production frequency of the cementing material determined in the step (5) according to the step (5) until the production frequencyf n Corresponding gel material dosagee n 、e n+1 、e n+2 The continuous 3 times of results satisfye 1 Until + -0.1, at this time, the production frequency is determinedf n The corresponding gel material dosage is thate 1 。
2. The method of determining the amount of binder according to claim 1, wherein in step (4), the method of determining the aggregate ratio of each grade is as follows: according to JTG/T F20-2015 rules of construction technology of highway pavement base layer, the mix proportion design is carried out, and the non-water mass percentage of each grade of aggregate is determined to be respectivelyp 1 、 p 2 、 p 3 、 p 4 。
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| 浅谈水泥稳定碎石生产配合比设计与施工质量控制;代印松;第十三届中国科协年会第19分会场-公路在综合交通运输体系中的地位和作用研讨会;第1-7页 * |
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