CN103726429A - Method for quickly verifying production grading of hot-mixed asphalt concrete - Google Patents

Abstract

The invention discloses a method for quickly verifying the production grading of hot-mixed asphalt concrete, and relates to a method for verifying the production grading of asphalt concrete. The invention provides the method for quickly verifying the production grading of the hot-mixed asphalt concrete to solve the problems that the existing process from 'hot aggregate bin material taking and screening' to 'adjustment of the production mixing ratio' is time-consuming and laboursome, the working efficiency is greatly influenced, a method capable of quickly verifying the production mixing ratio to adjust the production mixing ratio quickly in time, and predicting conditions of material waiting and material overflowing in production is searched. The method comprises the steps of one, calculating to estimate the production mixing ratio; two, obtaining the actual mixing ratio; three, performing production mixing ratio stability inspection; and four, performing prediction of material waiting and material overflowing, and the like. The method disclosed by the invention is applied to the field of the production grading of asphalt concrete.

Description

A kind of method of quick verification hot mixed asphaltic concrete production grating

Technical field

The present invention relates to a kind of method of bituminous concrete production grating.

Background technology

According to the requirement of < < standard specification for construction and acceptance of highway asphalt pavement > >, the mix-design of bituminous mixture divides three steps.

The first, target mix design: determine the match ratio of existing all size mineral aggregate, make the particle of Mineral Aggregate form the intermediate value that approaches specified grading scope; By selected aggregate mix proportion, with different pitches consumption, prepare marshal piece and determine best asphalt content by Marshall Test.

The second, production mix proportion design: the mineral aggregate in each cold burden storehouse according to target definite ratio of match ratio enters after Drying oven dry, re-starts aggregate mix proportion and calculates, and guarantees that each hot aggregate bin enters the ratio of mix chamber, and tests and determine best asphalt content.

The 3rd, production mix proportion checking: in the making test section stage before the formal construction of bituminous mixture deck, by practical condition, mix-design is verified.By target mix design, production mix proportion design and checking, can obtain both having met construction drawing design and code requirement, meet again the production mix proportion of producing and using needs.

In the production mix proportion design procedure of bituminous mixture, production mix proportion design is the important procedure before surfacing, and the verification of bituminous mixture actual production match ratio is the key link of Bitumen Mix Design, actual production match ratio is not only related to the quality of the Asphalt Mixture Performance of production with the degree of agreement of design production mix proportion, and directly affects construction speed and productivity effect.The step that China's checking and debugging bituminous mixture match ratio is mainly taked is at present: one, adjust cold burden storehouse rotating speed; Two, according to definite cold burden storehouse rotating speed, walk material; Three, hot aggregate bin feeding screening; Four, adjust production mix proportion.This flow process link consuming time at most, the most complicated is from " screening of hot aggregate bin feeding " to " adjustment production mix proportion " this process, its time-consuming, effort, greatly affected operating efficiency, therefore want the quick verification production mix proportion of finding method energy for adjusting in time fast production mix proportion.

In addition, tend to occur waiting the situation of material, flash in Process of Pitch Mixture Production, this not only can affect production efficiency, and can cause a large amount of raw-material wastes.How before production, to find in time to tend in Process of Pitch Mixture Production the situation of the material such as appearance, flash, find out reason wherein, find a kind of verification production mix proportion fast, can predict again in production, occur etc. the method for material, flash situation be the problem that current unit in charge of construction faces.

Summary of the invention

The object of the invention is existingly wastes time and energy to " adjustment production mix proportion " this process from " screening of hot aggregate bin feeding " in order to solve, greatly affected the problem of operating efficiency, find a kind of verification production mix proportion fast, to adjust in time production mix proportion, can predict in time again the method that waits material, flash situation occurring in production, thereby propose a kind of method of quick verification hot mixed asphaltic concrete production grating.

Above-mentioned goal of the invention is achieved through the following technical solutions:

The quality of material walked in step 1, record through cold burden storehouse and hot aggregate bin, according to the Mass Calculation of record, estimate production mix proportion; Wherein walk material and first through cold burden storehouse, pass through again hot aggregate bin;

Step 2, to each, through hot aggregate bin, walk material and sample to sieve and obtain actual match ratio;

Step 3, the production mix proportion that obtains by screening and estimate production mix proportion and make comparisons, make stability test according to comparative result;

Step 4, according to the prediction of the material such as the comparative result work of step 2 and step 3 flash; Completed a kind of method of quick verification hot mixed asphaltic concrete production grating.

Invention effect:

The present invention proposes a kind of bituminous mixture of verification quickly and accurately match ratio method, and on this basis its function has been done to further expansion.Because raw material are after vibrosieve, according to the size of sieve aperture, enter respectively different hot aggregate bins, and each grade of raw material itself exist a metastable grating, therefore, also there is accordingly a roughly stable proportionate relationship in the raw material that enter each hot aggregate bin, and charge proportion is consistent therewith for the discharging ratio of each hot aggregate bin, make each hot aggregate bin all the time in metastable state.The method of a kind of quick verification hot mixed asphaltic concrete production grating that therefore the present invention proposes is exactly verification bituminous mixture match ratio method, and being verification hot aggregate bin raw-material, verification bituminous mixture match ratio method essence enters-goes out relation, reasonably production mix proportion makes this relation reach balance, it not only requires the load of unit interval hot aggregate bin and unit interval to pass through the inlet amount balance of vibrosieve, and require each hot aggregate bin meet separately enter-go out balance, thereby effectively predict the material that waits occurring in producing, flash situation, improved the operating efficiency from " screening of hot aggregate bin feeding " to " adjustment production mix proportion " this process.

Accompanying drawing explanation

Fig. 1 is the method flow diagram of a kind of quick verification hot mixed asphaltic concrete production grating of proposition in the specific embodiment one;

The flexible pavement upper layer production mix proportion schematic diagram that Fig. 2 embodiment mono-proposes;

for gathering materials by the percentile upper limit, namely produce the fluctuation of aggregate graduation upper limit,

for gathering materials by percentile lower limit, namely produce fluctuation of aggregate graduation lower limit,

for target grating match ratio,

production grating match ratio;

The flexible pavement upper layer production mix proportion schematic diagram that Fig. 3 embodiment bis-proposes;

for gathering materials by the percentile upper limit, namely produce the fluctuation of aggregate graduation upper limit, for gathering materials by percentile lower limit, namely produce fluctuation of aggregate graduation lower limit,

for target grating match ratio,

production grating match ratio.

The specific embodiment

The specific embodiment one: the method for a kind of quick verification hot mixed asphaltic concrete production grating of present embodiment, specifically according to following steps, prepare:

The quality of material walked in step 1, record through cold burden storehouse and hot aggregate bin, according to the Mass Calculation of record, estimate production mix proportion; Wherein walk material and first through cold burden storehouse, pass through again hot aggregate bin;

Step 2, to each, through hot aggregate bin, walk material and sample to sieve and obtain actual match ratio;

Step 3, the production mix proportion that obtains by screening and estimate production mix proportion and make comparisons, make stability test according to comparative result;

Step 4, according to the prediction of the material such as the comparative result work of step 2 and step 3 flash; Completed a kind of method of quick verification hot mixed asphaltic concrete production grating, as shown in Figure 1.

Present embodiment effect:

Present embodiment has proposed a kind of bituminous mixture of verification quickly and accurately match ratio method, and on this basis its function has been done to further expansion.Because raw material are after vibrosieve, according to the size of sieve aperture, enter respectively different hot aggregate bins, and each grade of raw material itself exist a metastable grating, therefore, also there is accordingly a roughly stable proportionate relationship in the raw material that enter each hot aggregate bin, and charge proportion is consistent therewith for the discharging ratio of each hot aggregate bin, make each hot aggregate bin all the time in metastable state.The method of a kind of quick verification hot mixed asphaltic concrete production grating that therefore present embodiment proposes is exactly verification bituminous mixture match ratio method, and being verification hot aggregate bin raw-material, verification bituminous mixture match ratio method essence enters-goes out relation, reasonably production mix proportion makes this relation reach balance, it not only requires the load of unit interval hot aggregate bin and unit interval to pass through the inlet amount balance of vibrosieve, and require each hot aggregate bin meet separately enter-go out balance, thereby effectively predict the material that waits occurring in producing, flash situation, improved the operating efficiency from " screening of hot aggregate bin feeding " to " adjustment production mix proportion " this process.

The specific embodiment two: present embodiment is different from the specific embodiment one: described in step 1, the quality of material walked in record through cold burden storehouse and hot aggregate bin, estimates production mix proportion complete by following process according to the Mass Calculation of record:

1) material 3～10 minutes (each time is longer, more representative) are walked by rotating speed in cold burden storehouse, close cold burden storehouse; Attention: should keep sequence consensus while opening, closing cold burden storehouse; For example: during open cold feed bin, order is 5#, 4#, 3#, 2#, 1#, should be also 5#, 4#, 3#, 2#, 1# while closing;

2) close cold burden storehouse, after about 15 minutes, start to carry out the weighing (object of doing is like this to make each storehouse can access sufficient screening, and result is more representative) of each hot aggregate bin mineral aggregate; The order weighing is spaced apart order (for example: 3#, 5#, 1#, 4#, 2#) with large small particle diameter, prevents flushing, meanwhile, by this kind of blowing, sequentially also can check each feed bin whether to have the phenomenon of flushing; By fixing order, weigh one by one the quality of each hot aggregate bin mineral aggregate, the line item of going forward side by side;

3) according to the Mass Calculation of record, estimate production mix proportion;

4) suppose to have i hot aggregate bin, carried out walking for n time material, hot mixed asphaltic concrete is estimated production mix proportion and can be calculated as follows and obtain:

M ₁=m ₁₁+m ₁₂+L+m _1i （1）

${\stackrel{\&OverBar;}{A}}_{11}=m_{11}/M_1*100,{\stackrel{\&OverBar;}{A}}_{12}=m_{12}/M_1*100,{\stackrel{\&OverBar;}{A}}_{1i}=m_{1i}/M_1*100---\left(2\right)$

M ₂=m ₂₁+m ₂₂+…+m _2i （3）

${\stackrel{\&OverBar;}{A}}_{21}=m_{21}/M_2*100,{\stackrel{\&OverBar;}{A}}_{22}=m_{22}/M_2*100,...{\stackrel{\&OverBar;}{A}}_{2i}=m_{2i}/M_2*100---\left(4\right)$

M _n=m _n1+m _n2+…+m _ni （5）

${\stackrel{\&OverBar;}{A}}_{n1}=m_{n1}/M_n*100,{\stackrel{\&OverBar;}{A}}_{n2}=m_{n2}/M_n*100,{\stackrel{\&OverBar;}{A}}_{\mathrm{ni}}=m_{\mathrm{ni}}/M_n*100---\left(6\right)$

${\stackrel{\&OverBar;}{A}}_1=\left(\underset{i=1...n}{\mathrm{\&Sigma;}}{\stackrel{\&OverBar;}{A}}_{i1}\right)/n,{\stackrel{\&OverBar;}{A}}_2=\left(\underset{i=1...n}{\mathrm{\&Sigma;}}{\stackrel{\&OverBar;}{A}}_{i2}\right)/n,{\stackrel{\&OverBar;}{A}}_i=\left(\underset{i=1...n}{\mathrm{\&Sigma;}}{\stackrel{\&OverBar;}{A}}_{\mathrm{in}}\right)/n---\left(7\right)$

$A_1={\stackrel{\&OverBar;}{A}}_1*\frac{(100-P)}{100},{A_2=\stackrel{\&OverBar;}{A}}_2*\frac{(100-P)}{100},,A_i={\stackrel{\&OverBar;}{A}}_i*\frac{(100-P)}{100}---\left(8\right)$

1# hot aggregate bin hot mixed asphaltic concrete estimate production mix proportion: 2# hot aggregate bin hot mixed asphaltic concrete estimate production mix proportion: ... i# hot aggregate bin hot mixed asphaltic concrete estimate production mix proportion: breeze estimate production mix proportion=A ₁: A ₂: ...: A _i: P;

M wherein _{n_}the quality summation of each hot aggregate bin hot mixed asphaltic concrete while walking to expect for the n time, n=1,2 ... n;

M _{ni_}the quality of i# hot aggregate bin hot mixed asphaltic concrete while walking to expect for the n time, n=1,2, ... n, i=1,2....i, i# represents No. i;

A _{i_}i# hot aggregate bin hot mixed asphaltic concrete is estimated production mix proportion, and i# hot aggregate bin hot mixed asphaltic concrete is estimated production occupation rate, i=1, and 2 ... i;

i# hot aggregate bin hot mixed asphaltic concrete walks to expect average mark meter occupation rate, i.e. i=1,2......i;

i# hot aggregate bin hot mixed asphaltic concrete is walked the average mark meter occupation rate of material for the n time, and while walking to expect for the n time, the quality of i# hot aggregate bin hot mixed asphaltic concrete accounts for the percentage n=1 of the gross mass of each hot aggregate bin hot mixed asphaltic concrete while walking to expect for the n time, 2, ... ..n, i=1,2 ... ..i;

P-breeze content (during calculating, building stones and breeze being considered as to 100); Complete verification hot mixed asphaltic concrete and estimated the calculating of production mix proportion.Other step and parameter are identical with the specific embodiment one.

The specific embodiment three: present embodiment is different from the specific embodiment one or two: walk material through hot aggregate bin and sample and sieve the detailed process that obtains actual match ratio and be each described in step 2:

1) through hot aggregate bin, walk material at every turn sample screening, record various sizes aggregate quality;

2) suppose to have i aggregate size kind, hot mixed asphaltic concrete actual production match ratio can be calculated as follows and obtain:

M=m ₁+m ₂+L+m _i （9）

${A_1}^{\&prime;}=\frac{m_1}{M}*\frac{(100-P)}{100},{A_2}^{\&prime;}=\frac{m_2}{M}*\frac{(100-P)}{100},{A_i}^{\&prime;}=\frac{m_i}{M}*\frac{(100-P)}{100}---\left(10\right)$

Wherein M is the quality summation of sampling bituminous concrete;

M _ithe quality i=1 that the i# particle diameter that-screening obtains gathers materials, 2....i, i# represents No. i;

A _i'-i# particle diameter aggregate production match ratio, i.e. the i# particle diameter actual production occupation rate of gathering materials, i=1,2 ... i;

P-breeze content (during calculating, building stones and breeze being considered as to 100), has completed the calculating of hot mixed asphaltic concrete actual production match ratio.Other step and parameter are identical with the specific embodiment one or two

The specific embodiment four: present embodiment is different from the specific embodiment one to three: the production mix proportion obtaining by screening described in step 3 with estimate production mix proportion and make comparisons, the detailed process of making stability test according to comparative result is:

Relatively k# hot aggregate bin hot mixed asphaltic concrete is walked the average mark meter occupation rate of material for n time

If 1. divide meter occupation rate extreme difference R _k#≤ 2%, think that these storehouse hot mixed asphaltic concrete raw material are stable;

If 2. divide meter occupation rate extreme difference R _k#>2%, thinks that these storehouse hot mixed asphaltic concrete raw material are unstable, need to further search reason, and strictly controls in actual production.Other step and parameter are identical with the specific embodiment one or three.

The specific embodiment five: present embodiment is different from one of specific embodiment one to four: described in step 4 according to the detailed process of the prediction of the material flashes such as comparative result work of step 2 and step 3 be: the ratio A' of the match ratio that a certain particle diameter obtaining by screening in bituminous concrete is gathered materials ₁: A' ₂: the ratio A of L:P and the hot mixed asphaltic concrete production mix proportion estimated ₁: A ₂: ...: P compares respectively, wherein A' ₁+ A' ₂+ L+A _i'=100%, A ₁+ A ₂+ L+A _i=100%, in k# hot aggregate bin bituminous concrete, be sized the match ratio A' gathering materials that obtains a certain particle diameter _kestimate production mix proportion A with k# hot aggregate bin hot mixed asphaltic concrete _kcompare:

If 1. A _k-A' _k≤ ± 1%, think that k# hot aggregate bin in process of production such as there will not be at the phenomenon of material, flash;

If 2. A _k-A' _k>1%, thinks that flash situation very likely appears in k# hot aggregate bin in process of production;

If 3. A _k-A' _k<-1%, thinks that material situation very likely appears waiting in k# hot aggregate bin in process of production;

Wherein, k=1,2 ..., i, L represents ellipsis, is sized the match ratio A ' gathering materials that obtains a certain particle diameter in k# hot aggregate bin bituminous concrete _kbe in k# hot aggregate bin bituminous concrete, to be sized the quality m ' gathering materials that obtains a certain particle diameter _kratio with the gross mass M ' that gathers materials of various particle diameters in bituminous concrete.Other step and parameter are identical with one of specific embodiment one to four.

Adopt following examples to verify beneficial effect of the present invention:

Embodiment mono-:

The method of a kind of quick verification hot mixed asphaltic concrete production grating of the present embodiment, specifically according to following steps, prepare:

The quality of material walked in step 1, record through cold burden storehouse and hot aggregate bin, according to the Mass Calculation of record, estimate production mix proportion; Wherein walk material and first through cold burden storehouse, pass through again hot aggregate bin;

Material 3～10 minutes (each time is longer, more representative) are walked by rotating speed in cold burden storehouse, close cold burden storehouse; Attention: should keep sequence consensus while opening, closing cold burden storehouse; For example: during open cold feed bin, order is 5#, 4#, 3#, 2#, 1#, should be also 5#, 4#, 3#, 2#, 1# while closing; Close cold burden storehouse, after about 15 minutes, start to carry out the weighing (object of doing is like this to make each storehouse can access sufficient screening, and result is more representative) of each hot aggregate bin mineral aggregate; The large small particle diameter of the order interval (for example: 3#, 5#, 1#, 4#, 2#) weighing, prevents flushing, meanwhile, by this kind of blowing, sequentially also can check each feed bin whether to have the phenomenon of flushing; By fixing order, weigh one by one the quality of each hot aggregate bin mineral aggregate, the line item of going forward side by side;

According to the Mass Calculation of record, estimate production mix proportion;

This mixing station of flexible pavement upper layer production mix proportion verification establishes 4 hot aggregate bins altogether, has carried out walking for 3 times material, and hot mixed asphaltic concrete is estimated production mix proportion and can be calculated as follows and obtain:

M ₁=m ₁₁+m ₁₂+…+m _1i （1）

${\stackrel{\&OverBar;}{A}}_{11}=m_{11}/M_1*100,{\stackrel{\&OverBar;}{A}}_{12}=m_{12}/M_1*100,{\stackrel{\&OverBar;}{A}}_{1i}=m_{1i}/M_1*100---\left(2\right)$

M ₂=m ₂₁+m ₂₂+…+m _2i （3）

${\stackrel{\&OverBar;}{A}}_{21}=m_{21}/M_2*100,{\stackrel{\&OverBar;}{A}}_{22}=m_{22}/M_2*100,...{\stackrel{\&OverBar;}{A}}_{2i}=m_{2i}/M_2*100---\left(4\right)$

M _n=m _n1+m _n2+…+m _ni （5）

${\stackrel{\&OverBar;}{A}}_{n1}=m_{n1}/M_n*100,{\stackrel{\&OverBar;}{A}}_{n2}=m_{n2}/M_n*100,{\stackrel{\&OverBar;}{A}}_{\mathrm{ni}}=m_{\mathrm{ni}}/M_n*100---\left(6\right)$

${\stackrel{\&OverBar;}{A}}_1=\left(\underset{i=1...n}{\mathrm{\&Sigma;}}{\stackrel{\&OverBar;}{A}}_{i1}\right)/n,{\stackrel{\&OverBar;}{A}}_2=\left(\underset{i=1...n}{\mathrm{\&Sigma;}}{\stackrel{\&OverBar;}{A}}_{i2}\right)/n,{\stackrel{\&OverBar;}{A}}_i=\left(\underset{i=1...n}{\mathrm{\&Sigma;}}{\stackrel{\&OverBar;}{A}}_{\mathrm{in}}\right)/n---\left(7\right)$

$A_1={\stackrel{\&OverBar;}{A}}_1*\frac{(100-P)}{100},{A_2=\stackrel{\&OverBar;}{A}}_2*\frac{(100-P)}{100},,A_i={\stackrel{\&OverBar;}{A}}_i*\frac{(100-P)}{100}---\left(8\right)$

The production mix proportion that 1# hot aggregate bin hot mixed asphaltic concrete is estimated: the production mix proportion that 2# hot aggregate bin hot mixed asphaltic concrete is estimated: ... the production mix proportion that i# hot aggregate bin hot mixed asphaltic concrete is estimated: production mix proportion=A that breeze is estimated ₁: A ₂: ...: A _i: P;

M wherein _{n_}the quality summation of each hot aggregate bin hot mixed asphaltic concrete while walking to expect for the n time, n=1,2,3;

M _{ni_}the quality of i# hot aggregate bin hot mixed asphaltic concrete while walking to expect for the n time, n=1,2,3; I=1,2,3,4, i# represents No. i;

A _{i_}i# hot aggregate bin hot mixed asphaltic concrete is estimated production mix proportion, i=1,2 .3,4;

i# hot aggregate bin hot mixed asphaltic concrete walks to expect average mark meter occupation rate, i=1,2,3,4;

i# hot aggregate bin hot mixed asphaltic concrete is walked the average mark meter occupation rate of material, n=1,2,3, i=1,2,3,4 for the n time;

P-breeze content; Having completed verification hot mixed asphaltic concrete production mix proportion calculates;

Step 2, to each, through hot aggregate bin, walk material and sample to sieve and obtain actual match ratio;

1) through hot aggregate bin, walk material at every turn sample screening, and record the quality that each size is gathered materials;

2) suppose to have i aggregate size kind, hot mixed asphaltic concrete actual production match ratio can be calculated as follows and obtain:

M=m ₁+m ₂+L+m _i （9）

${A_1}^{\&prime;}=\frac{m_1}{M}*\frac{(100-P)}{100},{A_2}^{\&prime;}=\frac{m_2}{M}*\frac{(100-P)}{100},{A_i}^{\&prime;}=\frac{m_i}{M}*\frac{(100-P)}{100}---\left(10\right)$

Wherein M is the quality summation of sampling bituminous concrete;

M _ithe quality i=1 that the i# particle diameter that-screening obtains gathers materials, 2....i, i# represents No. i;

A _i'-i# particle diameter aggregate production match ratio, i.e. the i# particle diameter actual production occupation rate of gathering materials, i=1,2 ... i;

P-breeze content (during calculating, building stones and breeze being considered as to 100), has completed the calculating of hot mixed asphaltic concrete actual production match ratio;

Step 3, the production mix proportion that obtains by screening and estimate production mix proportion and make comparisons, make stability test according to comparative result;

Relatively k# hot aggregate bin hot mixed asphaltic concrete is walked the average mark meter occupation rate of material for 3 times

If 1. extreme difference R _k#≤ 2%, think that these storehouse hot mixed asphaltic concrete raw material are stable;

If 2. extreme difference R _k#>2%, thinks that these storehouse hot mixed asphaltic concrete raw material are unstable, need to further search reason, and strictly controls in actual production; Wherein, k=1,2,3,4;

Step 4, according to the prediction of the material such as the comparative result work of step 2 and step 3 flash;

The ratio A' of the match ratio that a certain particle diameter obtaining by screening in bituminous concrete is gathered materials ₁: A' ₂: ...: the ratio A of P and the hot mixed asphaltic concrete production mix proportion estimated ₁: A ₂: ...: P, wherein A' ₁+ A' ₂+ ... + P=100%, A ₁+ A ₂+ ... + P=100%, is sized the match ratio A' gathering materials that obtains a certain particle diameter in k# hot aggregate bin bituminous concrete _kwith k# hot aggregate bin hot mixed asphaltic concrete estimate production mix proportion A _kcompare:

If 1. A _k-A' _k≤ ± 1%, think that k# hot aggregate bin in process of production such as there will not be at the phenomenon of material, flash;

If 2. A _k-A' _k>1%, thinks that flash situation very likely appears in k# hot aggregate bin in process of production;

If 3. A _k-A' _k<-1%, thinks that material situation very likely appears waiting in k# hot aggregate bin in process of production; Wherein, k=1,2,3,4; A ' _kbe that in k# hot aggregate bin bituminous concrete, to be sized the match ratio of gathering materials that obtains a certain particle diameter be in k# hot aggregate bin bituminous concrete, to be sized the ratio that obtains the gross mass M ' that gathers materials of various particle diameters in the quality m ' k gathering materials of a certain particle diameter and bituminous concrete;

This mixing station of upper layer production mix proportion verification of embodiment mono-establishes 4 hot aggregate bins altogether, has carried out 3 times and has walked material, and concrete weighing result is in Table 1, and production mix proportion computational process is in Table 2:

Table 1 flexible pavement upper layer is produced away material consumption summary sheet

Table 2 flexible pavement upper layer production mix proportion is estimated computational chart (%)

By table 2, known: 1. estimate production mix proportion and sieve better that production mix proportion coincide, having proved the feasibility of this method; 2. A _k-A' _k≤ ± 1%, wherein: A ₁-A' ₁=+1%, A ₂-A' ₂=0%, A ₃-A' ₃=-1%, A ₄-A' ₄=0%; There will not be in process of production large-scale material, the flash of waiting; 3. the result that each hot aggregate bin is walked to expect for three times is all more approaching, and extreme difference is respectively R _1#=1.16%, R _2#=0.58%, R _3#=0.16%, R _4#=1.26%, R _k#≤ 2%, illustrate that raw-material stability is better as shown in Figure 2

By this match ratio, in actual manufacturing process, there is not waiting the situation of material, flash; Indices all meets the requirement of standard and design document after testing.

Embodiment bis-:

The method of the quick verification hot mixed asphaltic concrete of the present embodiment production grating, specifically according to following steps, prepare:

The quality of material walked in step 1, record through cold burden storehouse and hot aggregate bin, according to the Mass Calculation of record, estimate production mix proportion; Wherein walk material and first through cold burden storehouse, pass through again hot aggregate bin;

Material 3～10 minutes (each time is longer, more representative) are walked by rotating speed in cold burden storehouse, close cold burden storehouse; Attention: should keep sequence consensus while opening, closing cold burden storehouse; For example: during open cold feed bin, order is 5#, 4#, 3#, 2#, 1#, should be also 5#, 4#, 3#, 2#, 1# while closing; Close cold burden storehouse, after about 15 minutes, start to carry out the weighing (object of doing is like this to make each storehouse can access sufficient screening, and result is more representative) of each hot aggregate bin mineral aggregate; The large small particle diameter of the order interval (for example: 3#, 5#, 1#, 4#, 2#) weighing, prevents flushing, meanwhile, by this kind of blowing, sequentially also can check each feed bin whether to have the phenomenon of flushing; By fixing order, weigh one by one the quality of each hot aggregate bin mineral aggregate, the line item of going forward side by side; According to the Mass Calculation of record, estimate production mix proportion;

This mixing station of asphalt pavement of highway upper layer production mix proportion verification of embodiment bis-establishes 4 hot aggregate bins altogether, has carried out walking for 5 times material, and hot mixed asphaltic concrete is estimated production mix proportion and can be calculated as follows and obtain:

M ₁=m ₁₁+m ₁₂+…+m _1i （1）

${\stackrel{\&OverBar;}{A}}_{11}=m_{11}/M_1*100,{\stackrel{\&OverBar;}{A}}_{12}=m_{12}/M_1*100,{\stackrel{\&OverBar;}{A}}_{1i}=m_{1i}/M_1*100---\left(2\right)$

M ₂=m ₂₁+m ₂₂+…+m _2i （3）

${\stackrel{\&OverBar;}{A}}_{21}=m_{21}/M_2*100,{\stackrel{\&OverBar;}{A}}_{22}=m_{22}/M_2*100,...{\stackrel{\&OverBar;}{A}}_{2i}=m_{2i}/M_2*100---\left(4\right)$

M _n=m _n1+m _n2+…+m _ni （5）

${\stackrel{\&OverBar;}{A}}_{n1}=m_{n1}/M_n*100,{\stackrel{\&OverBar;}{A}}_{n2}=m_{n2}/M_n*100,{\stackrel{\&OverBar;}{A}}_{\mathrm{ni}}=m_{\mathrm{ni}}/M_n*100---\left(6\right)$

${\stackrel{\&OverBar;}{A}}_1=\left(\underset{i=1...n}{\mathrm{\&Sigma;}}{\stackrel{\&OverBar;}{A}}_{i1}\right)/n,{\stackrel{\&OverBar;}{A}}_2=\left(\underset{i=1...n}{\mathrm{\&Sigma;}}{\stackrel{\&OverBar;}{A}}_{i2}\right)/n,{\stackrel{\&OverBar;}{A}}_i=\left(\underset{i=1...n}{\mathrm{\&Sigma;}}{\stackrel{\&OverBar;}{A}}_{\mathrm{in}}\right)/n---\left(7\right)$

$A_1={\stackrel{\&OverBar;}{A}}_1*\frac{(100-P)}{100},{A_2=\stackrel{\&OverBar;}{A}}_2*\frac{(100-P)}{100},,A_i={\stackrel{\&OverBar;}{A}}_i*\frac{(100-P)}{100}---\left(8\right)$

The production mix proportion that 1# hot aggregate bin hot mixed asphaltic concrete is estimated: the production mix proportion that 2# hot aggregate bin hot mixed asphaltic concrete is estimated: ... the production mix proportion that i# hot aggregate bin hot mixed asphaltic concrete is estimated: production mix proportion=A that breeze is estimated ₁: A ₂: ...: A _i: P;

M wherein _{n_}the quality summation of each hot aggregate bin hot mixed asphaltic concrete when the 5th is walked to expect, n=1,2,3,4,5;

M _{ni_}the quality of i# hot aggregate bin hot mixed asphaltic concrete when the 5th is walked to expect, n=1,2,3,4,5; I=1,2,3,4, i# represents No. i;

A _{i_}i# hot aggregate bin hot mixed asphaltic concrete is estimated production mix proportion, i=1,2 .3,4;

i# hot aggregate bin hot mixed asphaltic concrete walks to expect average mark meter occupation rate, i=1,2,3,4;

i# hot aggregate bin hot mixed asphaltic concrete is walked the average mark meter occupation rate of material, n=1,2,3,4,5 for the n time; I=1,2,3,4;

P-breeze content (during calculating, building stones and breeze being considered as to 100); Completed verification hot mixed asphaltic concrete production mix proportion;

Step 2, to each, through hot aggregate bin, walk material and sample to sieve and obtain actual match ratio (detailed process);

1) through hot aggregate bin, walk material at every turn sample screening;

2) suppose to have i aggregate size kind, hot mixed asphaltic concrete actual production match ratio can be calculated as follows and obtain:

M=m ₁+m ₂+L+m _i（9）

${A_1}^{\&prime;}=\frac{m_1}{M}*\frac{(100-P)}{100},{A_2}^{\&prime;}=\frac{m_2}{M}*\frac{(100-P)}{100},{A_i}^{\&prime;}=\frac{m_i}{M}*\frac{(100-P)}{100}---\left(10\right)$

Wherein M is the quality summation of sampling bituminous concrete;

M _ithe quality i=1 that the i# particle diameter that-screening obtains gathers materials, 2....i, i# represents No. i;

A _i'-i# particle diameter aggregate production match ratio, i.e. the i# particle diameter actual production occupation rate of gathering materials, i=1,2 ... i;

P-breeze content (during calculating, building stones and breeze being considered as to 100), has completed the calculating of hot mixed asphaltic concrete actual production match ratio;

Step 3, the production mix proportion that obtains by screening and estimate production mix proportion and make comparisons, make stability test according to comparative result;

If 1. extreme difference R _k#≤ 2%, think that these storehouse hot mixed asphaltic concrete raw material are stable;

If 2. extreme difference R _k#>2%, thinks that these storehouse hot mixed asphaltic concrete raw material are unstable, need to further search reason, and strictly controls in actual production; Wherein, k=1,2,3,4;

Step 4, according to the prediction of the material such as the comparative result work of step 2 and step 3 flash;

The ratio A' of the match ratio that a certain particle diameter obtaining by screening in bituminous concrete is gathered materials ₁: A' ₂: ...: the ratio A of P and the hot mixed asphaltic concrete production mix proportion estimated ₁: A ₂: ...: P, wherein A' ₁+ A' ₂+ ... + P=100%, A ₁+ A ₂+ ... + P=100%, is sized the match ratio A' gathering materials that obtains a certain particle diameter in k# hot aggregate bin bituminous concrete _kwith k# hot aggregate bin hot mixed asphaltic concrete estimate production mix proportion A _kcompare:

If 1. A _k-A' _k≤ ± 1%, think that k# hot aggregate bin in process of production such as there will not be at the phenomenon of material, flash;

If 2. A _k-A' _k>1%, thinks that flash situation very likely appears in k# hot aggregate bin in process of production;

If 3. A _k-A' _k<-1%, thinks that material situation very likely appears waiting in k# hot aggregate bin in process of production;

Wherein, k=1,2,3,4; A ' _kbe that in k# hot aggregate bin bituminous concrete, to be sized the match ratio of gathering materials that obtains a certain particle diameter be in k# hot aggregate bin bituminous concrete, to be sized the quality m ' gathering materials that obtains a certain particle diameter _kratio with the gross mass M ' that gathers materials of various particle diameters in bituminous concrete;

Embodiment bis-flexible pavement upper layer production mix proportion verifications; This mixing station establishes 4 hot aggregate bins altogether, and test section has carried out walking for 5 times material for the first time, and concrete weighing result is in Table 3, and production mix proportion computational process is in Table 4;

Table 3 flexible pavement upper layer is produced away material consumption summary sheet

Table 4 flexible pavement upper layer production mix proportion is estimated summary sheet (%)

By table 4, known: 1. estimating production mix proportion has larger difference with screening match ratio: A ₁-A' ₁=-1%, A ₂-A' ₂=-2%, A ₃-A' ₃=+4%, A4-A'4=-1%, wherein the difference value of 3#, 2# is greater than setting A _k-A' _k≤ ± 1%, illustrate that more serious flash very likely occurs possibility, the 3# of the material such as 2# existence; 2. the extreme difference R of 3#, 2#, 1# _k#> 2%, wherein R _1#=2.22%, R _2#=2.76%, R _3#=4.61%, illustrate that raw material are unstable, therefore, need to ascertain the reason, controlled aborning;

By screening production mix proportion, carrying out the making of test section, find that in process of production 3# flash is serious, there is the material such as part in corresponding 2#, 4#; This situation has been reconfirmed this method feasibility in actual applications;

Further investigation reveals that, unit in charge of construction has two kinds for the aggregate chips of upper layer, and these two kinds of aggregate chips exist larger difference in gradation composition, and its stacking place is adjacent; Carrying out production mix proportion while walking to expect, owing to there is no explain oneself, two heaps material loading alternately while having caused manipulator feeding, has caused the difference of grating;

Subsequently, the raw material that adopt according to Target Mixture Ratio have carried out the material of walking of test section for the second time, and this is walked material and has carried out altogether 4 times, and specifically weighing result is in Table 5, and production mix proportion computational process is in Table 6:

Table 5 flexible pavement upper layer is produced away material consumption summary sheet

Table 6 flexible pavement upper layer production mix proportion is estimated summary sheet (%)

As can be seen from Table 6: 1. estimate production mix proportion and actual production match ratio is comparatively approaching, A _k-A' _k≤ ± 1%, wherein: A ₁-A' ₁=0%, A ₂-A' ₂=+1%, A ₃-A' ₃=-1%, A ₄-A' ₄=0%; Illustrate large-scale material, the flash of waiting can not occur in process of production; 2. the extreme difference of each hot aggregate bin is all less than 2% of regulation, wherein R _1#=1.98%, R _2#=0.81%, R _3#=1.70%, R _4#=1.02%, illustrate that each storehouse raw material are as shown in Figure 3 more stable;

By this match ratio, again carry out test section making, do not occur to wait material, flash situation, through check test section indices, meet the requirement of standard and design document.

Claims (5)

1. a method for quick verification hot mixed asphaltic concrete production grating, is characterized in that a kind of method of quick verification hot mixed asphaltic concrete production grating realizes according to following steps:

The quality of material walked in step 1, record through cold burden storehouse and hot aggregate bin, according to the Mass Calculation of record, estimate production mix proportion; Wherein walk material and first through cold burden storehouse, pass through again hot aggregate bin;

Step 2, to each, through hot aggregate bin, walk material and sample to sieve and obtain actual match ratio;

Step 3, the production mix proportion that obtains by screening and estimate production mix proportion and make comparisons, make stability test according to comparative result;

Step 4, according to the prediction of the material such as the comparative result work of step 2 and step 3 flash; Completed a kind of method of quick verification hot mixed asphaltic concrete production grating.

2. a kind of method of quick verification hot mixed asphaltic concrete production grating according to claim 1, it is characterized in that the quality of material walked in record through cold burden storehouse and hot aggregate bin described in step 1, according to the Mass Calculation of record, estimate production mix proportion and complete by following process:

1) material 3～10 minutes are walked by rotating speed in cold burden storehouse, close cold burden storehouse; Open, should keep sequence consensus while closing cold burden storehouse;

2) close cold burden storehouse, start to carry out the weighing of each hot aggregate bin mineral aggregate after 15 minutes, the order of weighing is spaced apart order with large small particle diameter, weighs one by one the quality of each hot aggregate bin mineral aggregate, the line item of going forward side by side by fixing order;

3) according to the Mass Calculation of record, estimate production mix proportion;

4) suppose to have i hot aggregate bin, carried out walking for n time material, hot mixed asphaltic concrete is estimated production mix proportion and can be calculated as follows and obtain:

M ₁=m ₁₁+m ₁₂+…+m _1i （1）

${\stackrel{\&OverBar;}{A}}_{11}=m_{11}/M_1*100,{\stackrel{\&OverBar;}{A}}_{12}=m_{12}/M_1*100,{\stackrel{\&OverBar;}{A}}_{1i}=m_{1i}/M_1*100---\left(2\right)$

M ₂=m ₂₁+m ₂₂+…+m _2i （3）

${\stackrel{\&OverBar;}{A}}_{21}=m_{21}/M_2*100,{\stackrel{\&OverBar;}{A}}_{22}=m_{22}/M_2*100,...{\stackrel{\&OverBar;}{A}}_{2i}=m_{2i}/M_2*100---\left(4\right)$

M _n=m _n1+m _n2+…+m _ni （5）

${\stackrel{\&OverBar;}{A}}_{n1}=m_{n1}/M_n*100,{\stackrel{\&OverBar;}{A}}_{n2}=m_{n2}/M_n*100,{\stackrel{\&OverBar;}{A}}_{\mathrm{ni}}=m_{\mathrm{ni}}/M_n*100---\left(6\right)$

${\stackrel{\&OverBar;}{A}}_1=\left(\underset{i=1...n}{\mathrm{\&Sigma;}}{\stackrel{\&OverBar;}{A}}_{i1}\right)/n,{\stackrel{\&OverBar;}{A}}_2=\left(\underset{i=1...n}{\mathrm{\&Sigma;}}{\stackrel{\&OverBar;}{A}}_{i2}\right)/n,{\stackrel{\&OverBar;}{A}}_i=\left(\underset{i=1...n}{\mathrm{\&Sigma;}}{\stackrel{\&OverBar;}{A}}_{\mathrm{in}}\right)/n---\left(7\right)$

$A_1={\stackrel{\&OverBar;}{A}}_1*\frac{(100-P)}{100},{A_2=\stackrel{\&OverBar;}{A}}_2*\frac{(100-P)}{100},,A_i={\stackrel{\&OverBar;}{A}}_i*\frac{(100-P)}{100}---\left(8\right)$

The production mix proportion that 1# hot aggregate bin hot mixed asphaltic concrete is estimated: the production mix proportion that 2# hot aggregate bin hot mixed asphaltic concrete is estimated: ... the production mix proportion that i# hot aggregate bin hot mixed asphaltic concrete is estimated:

Production mix proportion=A that breeze is estimated ₁: A ₂: ...: A _i: P; M wherein _{n_}the quality summation of each hot aggregate bin hot mixed asphaltic concrete while walking to expect for the n time, n=1,2 ... n; m _{ni_}the quality of i# hot aggregate bin hot mixed asphaltic concrete while walking to expect for the n time, n=1,2, ... n, i=1,2....i, i# represents No. i; A _{i_}i# hot aggregate bin hot mixed asphaltic concrete is estimated production mix proportion, i=1, and 2 ... i;

i# hot aggregate bin hot mixed asphaltic concrete walks to expect average mark meter occupation rate, i=1,2......i;

i# hot aggregate bin hot mixed asphaltic concrete is walked the average mark meter occupation rate of material for the n time, n=1, and 2 ... ..n, i=1,2 ... ..i; P-breeze content.

3. a kind of method of quick verification hot mixed asphaltic concrete production grating according to claim 1, is characterized in that described in step 2 through hot aggregate bin, walking material and sample and sieve the detailed process that obtains actual match ratio and be each:

1) through hot aggregate bin, walk material at every turn sample screening, record various sizes aggregate quality;

2) suppose to have i aggregate size kind, hot mixed asphaltic concrete actual production match ratio can be calculated as follows and obtain:

M=m ₁+m ₂+L+m _i （9）

${A_1}^{\&prime;}=\frac{m_1}{M}*\frac{(100-P)}{100},{A_2}^{\&prime;}=\frac{m_2}{M}*\frac{(100-P)}{100},{A_i}^{\&prime;}=\frac{m_i}{M}*\frac{(100-P)}{100}---\left(10\right)$

Wherein, M is the quality summation of sampling bituminous concrete;

M _ithe quality i=1 that the i# particle diameter that-screening obtains gathers materials, 2....i, i# represents No. i;

A _i'-i# particle diameter aggregate production match ratio, i.e. the i# particle diameter actual production occupation rate of gathering materials, i=1,2 ... i;

P-breeze content (during calculating, building stones and breeze being considered as to 100).

4. a kind of method of quick verification hot mixed asphaltic concrete production grating according to claim 1, it is characterized in that the production mix proportion that obtains by screening described in step 3 and estimate production mix proportion and make comparisons, the detailed process of making stability test according to comparative result is:

Relatively k# hot aggregate bin hot mixed asphaltic concrete is walked the average mark meter occupation rate of material for n time

If 1. divide meter occupation rate extreme difference R _k#≤ 2%, think that these storehouse hot mixed asphaltic concrete raw material are stable;

If 2. divide meter occupation rate extreme difference R _k#>2%, thinks that these storehouse hot mixed asphaltic concrete raw material are unstable, need to further search reason, and strictly controls in actual production.

5. a kind of method of quick verification hot mixed asphaltic concrete production grating according to claim 4, is characterized in that described in step 4 according to the detailed process of the prediction of the material flashes such as comparative result work of step 2 and step 3, being: the ratio A' of the match ratio that a certain particle diameter obtaining by screening in bituminous concrete is gathered materials ₁: A' ₂: the ratio A of L:P and the hot mixed asphaltic concrete production mix proportion estimated ₁: A ₂: ...: P compares respectively;

A' wherein ₁+ A' ₂+ L+A _i'=100%, A ₁+ A ₂+ L+A _i=100%, in k# hot aggregate bin bituminous concrete, be sized the match ratio A' gathering materials that obtains a certain particle diameter _kestimate production mix proportion A with k# hot aggregate bin hot mixed asphaltic concrete _kcompare:

If 1. A _k-A' _k≤ ± 1%, think that k# hot aggregate bin in process of production such as there will not be at the phenomenon of material, flash;

If 2. A _k-A' _k>1%, thinks that flash situation very likely appears in k# hot aggregate bin in process of production;

If 3. A _k-A' _k<-1%, thinks that material situation very likely appears waiting in k# hot aggregate bin in process of production;

Wherein, k=1,2 ..., i, L represents ellipsis, is sized and obtains gathering materials of a certain particle diameter in k# hot aggregate bin bituminous concrete

Match ratio A ' _kbe in k# hot aggregate bin bituminous concrete, to be sized the quality m ' gathering materials that obtains a certain particle diameter _kratio with the gross mass M ' that gathers materials of various particle diameters in bituminous concrete.

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