CN107290511A - The detection method that a kind of Cement treated material level is matched somebody with somebody - Google Patents
The detection method that a kind of Cement treated material level is matched somebody with somebody Download PDFInfo
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- CN107290511A CN107290511A CN201710473140.4A CN201710473140A CN107290511A CN 107290511 A CN107290511 A CN 107290511A CN 201710473140 A CN201710473140 A CN 201710473140A CN 107290511 A CN107290511 A CN 107290511A
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- 239000004568 cement Substances 0.000 title claims abstract description 59
- 239000000463 material Substances 0.000 title claims abstract description 49
- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 150000001875 compounds Chemical class 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000012216 screening Methods 0.000 claims abstract description 17
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 7
- 239000012459 cleaning agent Substances 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 3
- 230000000717 retained effect Effects 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 238000007654 immersion Methods 0.000 abstract 1
- 238000005336 cracking Methods 0.000 description 9
- 210000003298 dental enamel Anatomy 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-M Formate Chemical compound [O-]C=O BDAGIHXWWSANSR-UHFFFAOYSA-M 0.000 description 1
- 208000028804 PERCHING syndrome Diseases 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/383—Concrete or cement
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Ceramic Engineering (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention discloses the detection method that a kind of Cement treated material level is matched somebody with somebody, including：Take Cement treated material sample；Two parts of sample qualities are weighed, m ' is designated as respectively1、m’2, sample quality is placed on temperature to be dried at 105 DEG C ± 5 DEG C, and cool down, weigh drying sample, respectively m '3、m’4；Other two parts of sample qualities are weighed, m is designated as respectively1、m2, it is placed in water-bath, it is 55 DEG C ± 1 DEG C to control water temperature, is taken out after immersion 2h, is laid in a vessel disk and is dried in the case where temperature is 105 DEG C ± 5 DEG C, and cool down；Cement cleaning agent is added in sample after the cooling period to well mixed, compound is formed, stir-fries to mix surface without obvious Behavior of Hardened Cement Paste；The muddy water of mixture in clean container is filtered out by bushing screen；There is part fine powder mixture to fall within bushing screen；Compound on bushing screen is mixed with compound in clean container, is dried, weighed, quality m in the case where temperature is 105 DEG C ± 5 DEG C3；It is m to quality3Compound carry out bushing screen；Calculate screening result.
Description
Technical field
The present invention relates to the detection method that Cement treated material level is matched somebody with somebody, belong to pavement material detection field, can be applied to
Base course, the construction graded of underlayment Cement treated material are examined and evaluation.
Background technology
It is existing with the high speed development of highway in China transport development, road construction theory is also with high, Heavy Traffic amount
Development progressively tends at this stage the more this structure type of bituminous paving+semi-rigid type base of maturation.Although this pavement structure
Form has the advantages that many main flows for becoming road construction, but easily occurs in practical engineering application due to semi-rigid
Asphalt Pavement Cracking disease caused by base material microcrack, and then influence the durability of road.
Semi-rigid sub-base material generally refers to Cement treated material, wherein usually 5% cement for base material
Stable graded broken stone, what it is for subbase course material is usually 4% cement stabilized grading crushed stones.The master of semi-rigid sub-base material cracking
Factor is wanted to include dry shrinkage and cracking, temperature contracting cracking, the major influence factors of dry shrinkage and cracking are the consumption control of cement, stabilizing material
Three aspects such as Gradation Control, the control of optimum moisture content；The influence factor of temperature contracting cracking is external environment condition, and this needs
Carry out its water conservation of rigorous concentration, insulated curing when Cement treated material construction.
At this stage, for influenceing the cement consumption of dry shrinkage and cracking, optimum moisture content two indices all as Construction control
Important detection parameter, also there is corresponding detection method, but the level of Cement treated material site operation is not with but corresponding
Detection method, the cracking of this bituminous paving for the cracking of Cement treated material and caused by the later stage all will be a quality
Hidden danger.The level of site operation effectively verified with corresponding detection method is lacked to it, see whether with design level match somebody with somebody between deposit
In larger deviation.
In view of the above-mentioned problems, the present invention proposes the detection method that a kind of Cement treated material level is matched somebody with somebody, it is mainly used in constructing
Cement treated material level in journey is with detection and checking.
The content of the invention
In order to solve the above technical problems, it is an object of the invention to provide the detection method that a kind of Cement treated material level is matched somebody with somebody,
This method can detect the grading of aggregates of job site Cement treated material.
The purpose of the present invention is realized by following technical scheme：
The detection method that a kind of Cement treated material level is matched somebody with somebody, including：
Step A takes Cement treated material sample, and the specimen material includes four parts, and is bisected into two groups；
Step B weighs two parts of sample qualities, and m ' is designated as respectively1、m’2, sample quality is placed on oven temperature for 105 DEG C
Dried at ± 5 DEG C to constant weight, and be cooled to room temperature, weigh drying sample, respectively m '3、m’4；
Step C weighs other two parts of sample qualities, and m is designated as respectively1、m2, it is placed in water bath with thermostatic control, it is 55 to control water temperature
DEG C ± 1 DEG C, take out after soak time at least 2h, it is to be dried at 105 DEG C ± 5 DEG C to be laid in a vessel disk in oven temperature
It is dry, and it is cooled to room temperature；
Cement cleaning agent is added in the samples of step D after the cooling period to well mixed, compound is formed, stir-fries to compound
Surface is without obvious Behavior of Hardened Cement Paste；
The compound that Behavior of Hardened Cement Paste is cleaned up is placed in clean container by step E, and added water stirring, and cleaning is filtered out by bushing screen
The muddy water of mixture in container, until being clean water；It is described filter out during there is part fine powder mixture to fall within bushing screen；
Step F mixes the compound on bushing screen with compound in clean container, is placed in baking oven, is 105 in temperature
Dried at DEG C ± 5 DEG C to constant weight, weigh dry pack, quality m3；
Step G is m to quality by bushing screen3Compound carry out bushing screen；
Step H calculates screening result.
Compared with prior art, one or more embodiments of the invention can have the following advantages that：
Inorganic binder Site Detection blank is filled up, this has notable meaning for inorganic binder Site quality control
Justice.Abundant completion hydrated reaction of cement has been failed in the very first time in view of the Cement treated material of site operation, and it is commercially available
Cement cleaning agent be weaker than hydrolysis product of cement-CSH gels to the solvability of unhydrated particle, therefore in order to more accurate complete
Into test, the Cement treated material for fetching is soaked by 55 DEG C of ± 1 DEG C of waters bath with thermostatic control, cement fast hydration is realized, then adopt
Hydrolysis product of cement is thoroughly dissolved with cement cleaning agent, then will gather materials by WATER-WASHING METHOD separates with solvent, finally by combination
Bushing screen completes level with detection.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment the present invention is made into
The description of one step in detail.
In order to verify feasibility and accuracy of the Cement treated material level with detection method in the present invention, using known level
After the synthetic aggravation matched somebody with somebody is mixed and stirred with cement, water, tested by detection method, specific implementation process is as follows：
(1) Cement treated material that field sampling is returned is used into quartering, wherein two parts be used for mixture gradation detection,
Two parts are used for moisture content detection, and every part of quality is no less than 2kg.
(2) two parts of sample qualities are weighed, m ' is designated as respectively1、m’2(being accurate to 0.1g), is put into baking oven together with enamel tray
(105 DEG C ± 5 DEG C of temperature of control) drying is cooled to room temperature to constant weight, weighs correspondence drying sample quality, respectively m '3、m
’4。
(3) two parts of sample qualities are weighed, m is designated as respectively1、m2(being accurate to 0.1g), is then placed in two aluminium by sample respectively
In pot, then aluminum pot inserted in thermostat water bath together with sample.
(4) thermostat water bath is opened, 55 DEG C ± 1 DEG C of water temperature is controlled, sample soak time must not be less than 2h.
(5) aluminum pot is taken out, sample is poured into enamel tray, tiling is scattered.
(6) (105 DEG C ± 5 DEG C of temperature of control) drying and then by the enamel tray for filling sample is put into baking oven, and is cooled to
Room temperature.
(7) side addition cement cleaning agent, while being stir-fried back and forth with perching knife, until mix surface is without obvious Behavior of Hardened Cement Paste.Will place
The compound managed is put in a clean container, is added sufficient amount of clean water submerged compound, is sufficiently stirred for splash bar, is made thin
Powder is suspended in water.
(8) use 2.36mm and 0.075mm to constitute bushing screen (0.075mm is bottom sieve), carefully fine powder will be mixed with container
Suspension is poured out, and is flowed into by bushing screen in another clean container, is tried not to pour out coarse aggregate.(7)-(8) step is repeated, directly
Untill the water poured out is clean, it can be rinsed if necessary using sluggish flow.
(9) compound in the compound and container on bushing screen is all recycled in an enamel tray, carefully secreted
The ponding of enamel panel surface, is then placed in baking oven (105 DEG C ± 5 DEG C of temperature of control) drying by enamel tray together with compound
To constant weight, dry pack quality m3 is weighed.
(10) from the bottom to top, according to 0.075mm, 0.15mm, 0.3mm, 0.6mm, 1.18mm, 2.36mm, 4.75mm,
9.5mm, 13.2mm, 16.0mm, 19.0mm, 26.5mm, 31.5mm, 37.5mm, 53.0mm order composition bushing screen, enter to compound
Weight is recorded into table 1 respectively on row screening, the sieve of each sieve aperture.
(11) parallel test repeat step 6~10 is carried out.
(12) screening result is calculated according to the following equation, and result is inserted in table 1；
Screening calculating includes：Calculating, 0.075mm lower parts of screen sub-prime amount and the 0.075mm of Cement treated material moisture content are logical
Calculating, the calculating of accumulated retained percentage and each number sieve that the calculating for crossing rate, the calculating for sieving consume, each number screening meter are tailed over lead to
Cross the calculating of rate.
The calculating formula of the Cement treated material moisture content is as follows：
w1=(m '1-m’3)/m’3* 100% (1)
w2=(m '2-m’4)/m’4* 100% (2)
W=(w1+w2)/2 (3)
W in formula1、w2Respectively two groups parallel test compound moisture content；m’1、m’2The first prothyl of respectively two groups compounds
Amount；m’3、m’4The dry mass of respectively two groups compounds；W is the moisture content of Cement treated material；
Above-mentioned 0.075mm lower parts of screen sub-prime amount and the calculation formula of 0.075mm percent of pass are：
m0.075=m1/(1+w)-m3 (4)
P0.075=m0.075/m3 (5)
In formula：m0.075To wash the obtained quality less than 0.075mm parts in compound；P0.075To be small in compound
In 0.075mm content；m1For initial mixing material quality；m3To sieve upper gross mass after washing.
The calculation formula of above-mentioned screening consume is：
m5=m3-(Σmi+m0.075) (6)
If the proportion of goods damageds are more than 0.3%, it should test again, m in formula5Cause that the quality of part is lost for screening；m3After washing
Gross mass on sieve；miQuality more than the classifying screen sieved for each；m0.075It is less than 0.075mm parts for what washing in compound was obtained
Quality.
Above-mentioned each number screening counts the calculation formula tailed over and is：
P’i=mi/(m3-m5) * 100% (7)
In formula：P’iFor each number sieve grader retained percentage；m5Cause that the quality of part is lost for screening；m3To be sieved after washing
Upper gross mass；mi--- point meter on each sieve tails over quality；I is followed successively by 0.15mm, 0.3mm, 0.6mm ... to 57mm.
The accumulated retained percentage is the grader retained percentage sum of each number sieve more than this number is sieved, and is accurate to 0.1%；
The percent of pass Pi of each number sieve subtracts each number sieve accumulated retained percentage equal to 100, is accurate to 0.1%.
Table 1
Above-mentioned steps are after the synthetic aggravation matched somebody with somebody using known level is mixed and stirred with cement, water, to pass through detection side of the invention
Method is tested, and is chosen 10-30mm, 10-20mm, 5-10mm and 0-5mm fourth gear and is gathered materials, and passing ratio, which is mixed to match somebody with somebody, to be obtained synthesizing level
With rubble, each sieve aperture percent of pass is then obtained using dry sieve method and sees attached list 2：
Table 2
| Screen size (mm) | Standard percent of pass/% | Survey percent of pass/% | Difference/% |
| 53 | 100 | 100 | 0.0 |
| 37.5 | 100 | 100 | 0.0 |
| 31.5 | 96.5 | 98.6 | 2.1 |
| 26.5 | 93.2 | 93.5 | 0.3 |
| 19 | 85 | 87.9 | 2.9 |
| 16 | 79.5 | 79.5 | 0.0 |
| 13.2 | 60.4 | 62.1 | 1.7 |
| 9.5 | 39.6 | 38.6 | -1.0 |
| 4.75 | 21.4 | 20.5 | -0.9 |
| 2.36 | 14 | 13.4 | -0.6 |
| 1.18 | 9.6 | 10 | 0.4 |
| 0.6 | 6.5 | 6.7 | 0.2 |
| 0.3 | 5.2 | 5.6 | 0.4 |
| 0.15 | 4.4 | 4.8 | 0.4 |
| 0.075 | 4.2 | 4.4 | 0.2 |
According to 5% cement consumption, 5.2% optimal water consumption, formate gradation composition and the cement of respective quality, water are mixed and stirred together
Uniformly.
The detection method provided according to the present embodiment, detects that testing result sees attached list 3 to the Cement treated material：
Table 3
The screening result for contrasting subordinate list 2 and subordinate list 3 is understood：Survey percent of pass more to coincide with standard percent of pass, wherein partially
Difference is 2.9% to the maximum, and this meets repeatability error requirement for engineering detecting, shows the method tool that the present embodiment is provided
There are accuracy and science.
Although disclosed herein embodiment as above, described content is only to facilitate understanding the present invention and adopting
Embodiment, is not limited to the present invention.Any those skilled in the art to which this invention pertains, are not departing from this
On the premise of the disclosed spirit and scope of invention, any modification and change can be made in the implementing form and in details,
But the scope of patent protection of the present invention, still should be subject to the scope of the claims as defined in the appended claims.
Claims (8)
1. the detection method that a kind of Cement treated material level is matched somebody with somebody, it is characterised in that the described method comprises the following steps：
Step A takes Cement treated material sample, and the specimen material includes four parts, and is bisected into two groups；
Step B weighs two parts of sample qualities, and m ' is designated as respectively1、m’2, sample quality is placed on oven temperature for 105 DEG C ± 5 DEG C
It is lower to be dried to constant weight, and room temperature is cooled to, weigh drying sample, respectively m '3、m’4；
Step C weighs other two parts of sample qualities, and m is designated as respectively1、m2, it is placed in water bath with thermostatic control, it is 55 DEG C ± 1 to control water temperature
DEG C, taken out after soak time at least 2h, be laid in a vessel disk and dried in the case where oven temperature is 105 DEG C ± 5 DEG C, and it is cold
But to room temperature；
Cement cleaning agent is added in the samples of step D after the cooling period to well mixed, compound is formed, stir-fries to mix surface
Without obvious Behavior of Hardened Cement Paste；
The compound that Behavior of Hardened Cement Paste is cleaned up is placed in clean container by step E, and added water stirring, and clean container is filtered out by bushing screen
The muddy water of middle mixture, until being clean water；It is described filter out during there is part fine powder mixture to fall within bushing screen；
Step F mixes the compound on bushing screen with compound in clean container, is placed in baking oven, is 105 DEG C ± 5 in temperature
Dried at DEG C to constant weight, weigh dry pack, quality m3；
Step G is m to quality by bushing screen3Compound carry out bushing screen；
Step H calculates screening result.
2. the detection method that Cement treated material level as claimed in claim 1 is matched somebody with somebody, it is characterised in that
In four parts of quality, every part is at least 2kg；
Bushing screen is constituted using 2.36mm and 0.075mm in the step E, and wherein 0.075mm is bottom sieve；
In the step G using 0.075mm, 0.15mm, 0.3mm, 0.6mm, 1.18mm, 2.36mm, 4.75mm, 9.5mm,
13.2mm, 16.0mm, 19.0mm, 26.5mm, 31.5mm, 37.5mm, 53.0mm order composition bushing screen.
3. the detection method that Cement treated material level as claimed in claim 1 is matched somebody with somebody, it is characterised in that sieved in the step H
Calculating includes：The calculating of Cement treated material moisture content, the calculating of 0.075mm lower parts of screen sub-prime amount and 0.075mm percent of pass, sieve
Calculating, the calculating of accumulated retained percentage and the calculating of each number sieve percent of pass for dividing the calculating of consume, each number screening meter to tail over.
4. the detection method that Cement treated material level as claimed in claim 3 is matched somebody with somebody, it is characterised in that the Cement treated material
The calculating formula of moisture content is as follows：
w1=(m '1-m’3)/m’3* 100% (1)
w2=(m '2-m’4)/m’4* 100% (2)
W=(w1+w2)/2 (3)
W in formula1、w2Respectively two groups parallel test compound moisture content；m’1、m’2Respectively two groups compound initial masses；m
’3、m’4The dry mass of respectively two groups compounds；W is the moisture content of Cement treated material.
5. the detection method that Cement treated material level as claimed in claim 3 is matched somebody with somebody, it is characterised in that under the 0.075mm sieves
The calculation formula of part mass and 0.075mm percent of pass is：
m0.075=m1/(1+w)-m3 (4)
P0.075=m0.075/m3 (5)
In formula：m0.075To wash the obtained quality less than 0.075mm parts in compound；P0.075To be less than in compound
0.075mm content；m1For initial mixing material quality；m3To sieve upper gross mass after washing.
6. the detection method that Cement treated material level as claimed in claim 3 is matched somebody with somebody, it is characterised in that the meter of the screening consume
Calculating formula is：
m5=m3-(Σmi+m0.075) (6)
If the proportion of goods damageds are more than 0.3%, it should test again, m in formula5Cause that the quality of part is lost for screening；m3To be sieved after washing
Gross mass；miQuality more than the classifying screen sieved for each；m0.075To wash the obtained matter less than 0.075mm parts in compound
Amount.
7. the detection method that Cement treated material level as claimed in claim 3 is matched somebody with somebody, it is characterised in that each number screening meter sieve
Remaining calculation formula is：
P’i=mi/(m3-m5) * 100% (7)
In formula：P’iFor each number sieve grader retained percentage；m5Cause that the quality of part is lost for screening；m3It is upper total to be sieved after washing
Quality；mi--- point meter on each sieve tails over quality；I is followed successively by 0.15mm, 0.3mm, 0.6mm ... to 57mm.
8. the detection method that Cement treated material level as claimed in claim 3 is matched somebody with somebody, it is characterised in that described to add up to tail over percentage
Rate is the grader retained percentage sum of each number sieve more than this number is sieved, and is accurate to 0.1%；
The percent of pass Pi of each number sieve subtracts each number sieve accumulated retained percentage equal to 100, is accurate to 0.1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710473140.4A CN107290511B (en) | 2017-06-21 | 2017-06-21 | Detection method for grading of cement stabilizing material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710473140.4A CN107290511B (en) | 2017-06-21 | 2017-06-21 | Detection method for grading of cement stabilizing material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108593481A (en) * | 2018-04-11 | 2018-09-28 | 镇江市建科工程质量检测中心有限公司 | A kind of detection method of cement stabilized macadam grading |
| CN111537385A (en) * | 2020-04-26 | 2020-08-14 | 山东莱钢永锋钢铁有限公司 | Cement fineness inspection method |
| CN114804688A (en) * | 2022-06-27 | 2022-07-29 | 山西工程科技职业大学 | Method for determining gradation and mixing ratio of regenerated mixed fine aggregate |
-
2017
- 2017-06-21 CN CN201710473140.4A patent/CN107290511B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108593481A (en) * | 2018-04-11 | 2018-09-28 | 镇江市建科工程质量检测中心有限公司 | A kind of detection method of cement stabilized macadam grading |
| CN111537385A (en) * | 2020-04-26 | 2020-08-14 | 山东莱钢永锋钢铁有限公司 | Cement fineness inspection method |
| CN114804688A (en) * | 2022-06-27 | 2022-07-29 | 山西工程科技职业大学 | Method for determining gradation and mixing ratio of regenerated mixed fine aggregate |
| CN114804688B (en) * | 2022-06-27 | 2022-09-16 | 山西工程科技职业大学 | Method for determining gradation and mixing ratio of regenerated mixed fine aggregate |
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| Publication number | Publication date |
|---|---|
| CN107290511B (en) | 2020-07-17 |
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