CN108387414A - A kind of compactibility rendzinas ash dosage EDTA consumptions detection method for making sample - Google Patents
A kind of compactibility rendzinas ash dosage EDTA consumptions detection method for making sample Download PDFInfo
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- CN108387414A CN108387414A CN201810065649.XA CN201810065649A CN108387414A CN 108387414 A CN108387414 A CN 108387414A CN 201810065649 A CN201810065649 A CN 201810065649A CN 108387414 A CN108387414 A CN 108387414A
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- edta
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
Abstract
A kind of compactibility rendzinas ash dosage EDTA consumptions detection method for making sample, 1) by the optimum moisture content mixing rendzinas soil sample of different grey dosage；2) the first grey dosage (mixing ash quantity) soil sample is chosen, is compacted obtain lime soil soil sample by engineering compaction, using plastic film wrapped and is conserved to the curing time needed；The time lime soil soil sample of different maintenances is divided into three layers of cake of upper, middle and lower, the lime soil soil sample at cake center is taken to carry out EDTA consumption measurements, the average value for taking three soil sample measurements to obtain；Draw the relation curve of curing time and EDTA consumption measurements under the first grey dosage；Second of grey dosage (mixing ash quantity) soil sample is chosen, the relation curve of curing time and EDTA consumption measurements under second of ash dosage is drawn, so repeats the relation curve of curing time and EDTA consumption measurements under the usual range of the grey dosage of covering.
Description
One, technical field
The present invention relates to cement or the detection method for making sample of construction of limestone soil, compactibility rendzinas ash dosage EDTA consumptions
Detect method for making sample.
Two, background technology
The measurement of cement or lime dosage is the most important control of cement or construction of limestone soil in cement or lime stabilized soil
One of standard；It completes to measure frequently with EDTA titrations at present；EDTA titrations quickly measure cement and stone suitable for building site
The dosage of cement and lime in grey stabilizing material, and the uniformity that can be used for checking job mix and paving
Grey dosage is one of technical indicator mostly important in compactibility construction of limestone soil, due to directly affecting construction quality
And cost, detected value bigger than normal easy influence construction quality extremely important to the control of grey dosage in compactibility rendzinas, detected value
The appearance less than normal for be easy to causeing multiple pressure of doing over again causes the increase of project cost, also causes large effect to construction quality.
EDTA consumptions are the main experimental method of current detection compactibility rendzinas soil body ash dosage, the detection of current EDTA consumptions
Method for making sample is detected using loose earth, and this method for making sample is very accurate for the detection for not being compacted maintenance soil body ash dosage
Really, but mostly the detection of compactibility soil body ash dosage is happened at the long period after mixing ash, using scattered soil method for making sample not
The external factor such as the compactness in the compactibility rendzinas course of work, sample preparation moisture content and water-cut variation can be simulated to disappear to EDTA
The influence of consumption, the soil body for causing identical grey dosage use the grey dosage that EDTA consumption test methods are measured with maintenance
The increase of time and the appearance for being gradually reduced phenomenon.
Although the advantages of detection of EDTA consumptions is accurate there is testing result and speed, there is also it is serious not
Foot place, directly affects the standard of construction site lime content detection whether being mainly manifested in EDTA consumption standards Drawing of Curve accurately
True property.
Three, invention content
Purpose of the present invention is in order to solve to measure compactibility rendzinas ash dosage using existing EDTA consumption quantity measuring methods
Existing testing result does not meet practical problem, creatively proposes a kind of new EDTA consumptions detection sample preparation side
Method --- by changing moisture content and compactness in existing compactibility rendzinas lime content detection, a kind of new of formation meets
The EDTA consumptions of the compactibilities rendzinas working environment such as embankment detect method for making sample.
The technical scheme is that a kind of compactibility rendzinas ash dosage EDTA consumptions detect method for making sample, feature
It is：1) the optimum moisture content mixing rendzinas soil sample of different grey dosage is pressed；2) the first grey dosage (mixing ash quantity) soil is chosen
Sample is compacted obtain lime soil soil sample by engineering compaction, using plastic film wrapped and is conserved to when the maintenance needed
Between；The time lime soil soil sample of different maintenances is divided into three layers of cake of upper, middle and lower, takes the lime soil soil at cake center
Sample carries out EDTA and consumes measurement, the average value for taking three soil sample measurements to obtain；Draw under the first grey dosage curing time with
EDTA consumes the relation curve of measurement；Second of grey dosage (mixing ash quantity) soil sample is chosen, draws and is conserved under second of grey dosage
The relation curve of time and EDTA consumption measurements so repeat curing time under the usual range of the grey dosage of covering and disappear with EDTA
The relation curve of consumption measurement.
Roadbed soil sample is drilled through using core boring sampling method and carries out EDTA consumption detections, roadbed soil sample is drilled through by measuring
EDTA consumptions drill through roadbed (rendzinas) soil sample in grey dosage and the lookup in EDTA consumption relational graphs of identical curing time
Grey dosage.
On the grey dosage and EDTA consumption relation curves of curing time；It is bent that an EDTA consumption standard need to only be drawn
Line, the rendzinas of different ash dosage may be used above-mentioned same EDTA consumptions relation curve and consulted, speed.
The present invention simulate compactibility rendzinas actual working environment, using with compactibility rendzinas actual working environment phase
Same moisture content and compactness carries out the sample preparation of EDTA consumptions and detection, has minimized (compacting) rendzinas embankment ash dosage
The difference of the grey dosage of detection and practical grey dosage in detection；It is compared in traditional experiment and EDTA consumption is carried out using loose ground
The method for making sample of Specification Curve of Increasing is measured, the method measured rendzinas EDTA consumptions occurs as curing time is gradual
The phenomenon that " decaying ", EDTA consumptions of the invention detect method for making sample in terms of compactness, sample preparation moisture content and maintenance process,
Be capable of the actual working environment of effectively simulation compactibility rendzinas work, reduce the influence due to external environment and caused by
The inaccurate problem of EDTA consumptions detection.
Advantageous effect：1, the present invention is grey using existing EDTA consumption quantity measuring method measurement compactibility rendzinases in order to solve
Testing result existing for dosage does not meet practical problem, i.e., the EDTA consumptions in traditional lime content detection detect method for making sample
Detected grey dosage engineering phenomenon of " decaying " with the increase of rendzinas curing time, creatively proposes one kind
New rendzinas EDTA consumptions detect method for making sample, use EDTA consumptions to detect rendzinas ash agent to efficiently solve
The phenomenon that amount is with curing time gradual " decaying ".The method for making sample is suitable for the ash that embankment, side slope etc. are compacted the rendzinas soil body
Dose measurement can effectively reduce the appearance of rendzinas ash dosage " decaying " phenomenon, more accurately detect lime soil soil
Grey dosage in body.Creatively propose a kind of new EDTA consumptions detection method for making sample --- by changing existing compacting
Property rendzinas lime content detection in moisture content and compactness, a kind of of formation new meet the work of the compactibilities rendzinas such as embankment
The EDTA consumptions of environment detect method for making sample.
2, new method for making sample remains the advantages of EDTA consumption quantity measuring methods first：The advantages of EDTA consumptions detect
Mainly there is the following：
1) testing result is accurate：EDTA consumes quantity measuring method mainly by the calcium salt in EDTA solution measurement rendzinas
Stability is better than EDETATE DISODIUM, is 12~13 in pH value of solution, triethanolamine and Al3+、Fe3+Form the item of stable complex compound
Under part, the effective Ca stablized in soil is measured using common Metal ion indicator calred indicator2+Ion concentration, to
Go out the relationship of EDTA consumptions and grey dosage, this method is for effective Ca in the detection rendzinas soil body2+Ion concentration is very
Accurately.
2) detection speed is fast：Compared to other lime content detection methods, the grey agent of rendzinas is detected by EDTA consumptions
Speed is measured, the grey dosage method of EDTA consumptions detection is mainly the EDTA consumption marks for the rendzinas for drawing different grey dosage
Then directrix curve measures the EDTA consumptions of the live soil body, the ash of live rendzinas is determined by the method for consulting standard curve
Dosage, it is therefore, different in the case of the soil body and lime all same, an EDTA consumption standard curve only need to be drawn
The rendzinas of grey dosage may be used same EDTA consumption standards curve and be consulted, speed.
3, by a large amount of laboratory tests, the rule that lime dosage changes over time in lime stabilized soil is studied, is established different
The standard curve that EDTA consumptions reduce at any time under grey dosage is consulted by measuring the practical EDTA consumptions of the live soil body
The EDTA consumption standard curves drawn, determine the grey dosage of the compactibility soil body, and to live lime content detection and roadbed pressure
Real result is modified；This method is also applied for mixing cement content in soil-cement body and measures.
It is compared to the method for making sample for carrying out EDTA consumption standard Drawing of Curve in traditional experiment using loose ground, is surveyed
Fixed rendzinas EDTA consumptions with curing time gradually " decaying " the phenomenon that, new EDTA consumptions detection method for making sample from
In terms of compactness, sample preparation moisture content and maintenance process, it is capable of the actual working environment of effective simulation compactibility rendzinas work,
Reduce the influence due to external environment and caused by the inaccurate problem of EDTA consumptions detection.The present invention solves EDTA consumptions
The problem of rendzinas ash dosage of detection is with curing time gradual " decaying ", passes through and pressure identical with compactibility rendzinas is arranged
Solidity, construction moisture content and maintenance process etc. and the new EDTA consumptions that are formed detect method for making sample.
Four, it illustrates
The revised EDTA consumption standards Drawing of Curve flows of Fig. 1；
Lime content detection result under Fig. 2 different tests methods.
Five, specific implementation mode
Although the advantages of detection of EDTA consumptions is accurate there is testing result and speed, there is also it is serious not
Foot place, directly affects the standard of construction site lime content detection whether being mainly manifested in EDTA consumption standards Drawing of Curve accurately
True property.And the existing method for carrying out EDTA consumption standard Drawing of Curve using scattered soil can relatively accurately be drawn without maintenance
The EDTA consumption standard curves of the rendzinas soil body, but due to that cannot simulate compactness in maintenance processes, construction moisture content and contain
The influences of the factors to EDTA consumptions such as water rate variation, it is inaccurate to the lime content detection of the rendzinas soil body after maintenance, it causes
The lime content detection of the compactibilities soil body such as existing embankment, side slope increases and the gradually appearance of " decaying " phenomenon with curing time.
In order to make up using the deficiency for dissipating soil drafting EDTA consumption standard curves, it is proposed that a kind of new EDTA consumptions
The method for making sample of Specification Curve of Increasing.Mix ash using construction moisture content, be compacted according to Field Compactness, by lime
Soil sample, which is put into polybag, to be conserved to after needing age, is fetched earth and is carried out EDTA consumption detections, and then draws different grey dosage
Under EDTA consumption standard curves.This method, which effectively compensates for existing method for making sample, cannot simulate compactness in maintenance processes
And the shortcomings that water-cut variation situation, while remaining the advantages of quantity measuring method is consumed using EDTA.So that using the sample preparation
The EDTA consumption standard curves that method is drawn not only allow for influence of the external factor in maintenance processes to EDTA consumptions,
Also the advantages of combining existing EDTA consumptions detection.
Cylinder due to hitting the real soil body, the porous media of soil body surface and inside is inconsistent, is answered when experiment is fetched earth
Experiment soil sample is divided into three layers, the soil body at every layer of center is chosen and is detected, the EDTA consumptions of the soil sample use three kinds of soil
The average value of body indicates.
The test procedure of new compactibility rendzinas ash dosage EDTA consumptions detection method for making sample is as follows：
1. drawing the EDTA consumption standard curves of the compactibility soil body
2. drilling through roadbed soil sample using core boring sampling method carries out EDTA consumption tests, the EDTA for measuring soil sample is consumed
Amount, in the grey dosage of the grey dosage and lookup rendzinas in EDTA consumption relational graphs of identical curing time.If being measured
EDTA consumptions are then indicated using the linear difference method of adjacent two grey dosage not on the curve of any grey dosage.After Fig. 1 is corrected
EDTA consumption standard curve plotting methods.
The reasonability that EDTA consumptions detect method for making sample is improved for verification, the different soil sample of two kinds of properties is chosen and carries out not
With the EDTA consumption contrast tests under sample preparation and maintenance process, the grey dosage selection 5% in experiment improves the pressure of method for making sample
Solidity is 95%.
Verification experimental verification
3. the fundamental property of experiment soil
The soil indicators of two kinds of experiment soil are shown in Table 1, test and use the CaO content of lime for 74.2%, and content of MgO is
0.67%, belong to III grade of calcareous calcium hydroxide.
The soil property soil nature of 1 two kinds of soil samples of table
2. testing the selection of moisture content in EDTA standard curves
It is respectively general clay (soil sample 1) and weak expansive soil (soil sample 2) due to selecting two kinds of soil samples in embodiment, therefore two
The moisture content of the EDTA consumptions detection of kind soil sample element soil uses the optimum moisture content of dry method heavy compaction determination, and for mixing ash
Under the conditions of the optimum moisture content of soil sample different method be respectively adopted determine, i.e., soil sample 1 is contained using the optimal of dry method heavy compaction
Water rate (15.2-20.4%), soil sample 2 is using the moisture content (19.2-23.8%) corresponding to maximum CBR values, EDTA consumption marks
The optimum moisture content of each ash dosage is shown in Table 2 in directrix curve.The sample preparation moisture content of the grey dosage of two kinds of soil samples 5% uses linear interpolation method
It determines, respectively 19.3% and 22.8%.
Optimum moisture content under the different grey dosage of table 2
3. verifying conclusion
Fig. 2 is the soil sample that two kinds of grey dosage is 5%, and in specification (routine) and under improving latter two test method, grey dosage declines
Subtract as a result, and drawing curve.
Claims (2)
1. a kind of compactibility rendzinas ash dosage EDTA consumptions detect method for making sample, it is characterised in that：1）By different grey agent
The optimum moisture content mixing rendzinas soil sample of amount；2）Choose the first grey dosage（Mix ash quantity）Soil sample is carried out by engineering compaction
Compacting obtains lime soil soil sample, using plastic film wrapped and conserves to the curing time needed；By the time of different maintenances
Lime soil soil sample is divided into three layers of cake of upper, middle and lower, takes the lime soil soil sample at cake center to carry out EDTA consumption and measures
Amount, the average value for taking three soil sample measurements to obtain；Draw the pass of curing time and EDTA consumption measurements under the first grey dosage
It is curve；Choose second of grey dosage（Mix ash quantity）Soil sample is drawn curing time under second of grey dosage and is measured with EDTA consumption
The relation curve of amount, the relationship for so repeating curing time and EDTA consumption measurements under the usual range of the grey dosage of covering are bent
Line.
2. EDTA consumptions according to claim 1 detect method for making sample, it is characterised in that：It is drilled through using core boring sampling method
Roadbed soil sample simultaneously carries out EDTA consumption detections, the EDTA consumptions for drilling through roadbed soil sample will be measured, in identical curing time
Grey dosage and EDTA consumption relational graphs on search the grey dosage for drilling through roadbed soil sample.
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Citations (6)
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|---|---|---|---|---|
| CN1609613A (en) * | 2004-11-25 | 2005-04-27 | 长安大学 | Method for determining lime dosage in long-life limy stabilized soil |
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2018
- 2018-01-23 CN CN201810065649.XA patent/CN108387414A/en active Pending
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| CN1609613A (en) * | 2004-11-25 | 2005-04-27 | 长安大学 | Method for determining lime dosage in long-life limy stabilized soil |
| EP1948773B1 (en) * | 2005-11-14 | 2016-03-30 | Henkel AG & Co. KGaA | Fragrant consumer products comprising oxidizing agents |
| CN101995446A (en) * | 2010-06-25 | 2011-03-30 | 江苏省交通科学研究院股份有限公司 | Method for analyzing components of coal ash and cement in concrete mixture |
| CN101982770A (en) * | 2010-11-15 | 2011-03-02 | 河海大学 | Method for detecting cement dosage in core test sample of cement mixing pile |
| CN105548526A (en) * | 2015-11-24 | 2016-05-04 | 镇江市船山第二水泥厂 | Method for measuring cement dosage |
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