CN105300978A - Method for detecting whether warm mix asphalt contains oil-soluble amine surfactant warm mix agent - Google Patents
Method for detecting whether warm mix asphalt contains oil-soluble amine surfactant warm mix agent Download PDFInfo
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- CN105300978A CN105300978A CN201510795457.0A CN201510795457A CN105300978A CN 105300978 A CN105300978 A CN 105300978A CN 201510795457 A CN201510795457 A CN 201510795457A CN 105300978 A CN105300978 A CN 105300978A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The present invention relates to a method for detecting whether warm mix asphalt contains an oil-soluble amine surfactant warm mix agent. The method comprises: (1) weighing a sample to be detected, adding a solvent, and heating until the solvent presents a micro-boiling state and the color is changed into pale yellow; (2) pouring out the supernatant obtained in the step (1), adding a detection reagent in a dropwise manner, and observing the color change of the supernatant; (3) pouring out the supernatant obtained in the step (1), heating the supernatant, adding a detection reagent in a dropwise manner, and observing the color change of the supernatant; and (4) according to the step (2) and the step (3), determining whether the sample to be detected contains the oil-soluble amine surfactant warm mix agent. According to the present invention, the chromogenic reaction detection method has characteristics of not high requirement on test instrument, equipment and testing personnel, low detection cost, high sensitivity, and high practical value.
Description
Technical field
The invention belongs to asphalt highway warm mix technical field, be specifically related to containing oil soluble amine surfactants warm-mixing agent detection method in a kind of warm-mixed asphalt.
Background technology
Warm-mixed asphalt ground surface material due to its low-carbon environment-friendly and energy-saving and emission-reduction advantage and obtain and pay close attention to widely and apply.At present, conventional on market is warm-mixed asphalt ground surface material based on surfactant type warm-mixing agent, it develops into now to the third generation, it is after a kind of oil-soluble amine surfactant type warm-mixing agent is added pitch, through certain processing technology, formed stay-in-grade, can reduce that pitch mixes and stirs, the product of construction temperature.It in use enormously simplify production technology, does not need to transform existing mixing apparatus, reduces the dependence to equipment; Meanwhile, large-scale industrial production makes its qualitative variability greatly reduce, and serves guarantee to the pavement performance of pitch and asphalt.
In current warm-mixed asphalt, whether warm-mixing agent is deposited also does not have detection method, the associated specifications of warm-mixed asphalt also is not formulated out, quality monitoring and control cannot be carried out to it, therefore for effectively to detect the warm-mixing agent in warm-mixed asphalt, provide a kind of and detect rapidly, easily detection method tool be of great significance.
Summary of the invention
The present invention is that after utilizing warm-mixing agent and bromophenol blue indicator generation chemical reaction, solution presents blue phenomenon and comes whether there is warm-mixing agent in qualitative detection warm-mixed asphalt, the method is simple, solves the problem that in current warm-mixed asphalt, warm-mixing agent does not have method to detect.
Technical scheme of the present invention is as follows:
Containing oil soluble amine surfactants warm-mixing agent detection method in a kind of warm-mixed asphalt, comprises the following steps:
(1) take testing sample, and add solvent, be heated to solvent and be slight boiling condition and color becomes light yellow;
(2) supernatant liquor in step (1) is poured out, and instillation detects reagent, observe the color change of clear liquid;
(3) poured out by the supernatant liquor in step (1), and heat clear liquid, then instillation detects reagent, observes the color change of clear liquid,
(4) judge whether containing oil-soluble amine surfactant type warm-mixing agent in testing sample according to step (2) and step (3),
Described detection reagent is the bromophenol blue indicator be dissolved in neutral organic solvent.
Described detection reagent is composed of the following components: 10 ~ 100ml isopropyl alcohol, 0.02 ~ 3.0g bromophenol blue.
Preferably, described isopropyl alcohol is pure for analyzing.
Preferably, in described step (1), the addition of testing sample is 0.1-2.0g; The addition of solvent is: 10-200ml.
Preferably, the solvent in described step (1) is isopropyl alcohol.
Preferably, the addition detecting reagent in described step (2) is that 3-5 drips.
Preferably, the heat time in described step (3) is 1-3min, and the addition detecting reagent is that 3-5 drips.
Preferably, in described step (4) in testing sample containing oil-soluble amine surfactant type warm-mixing agent be whether: the clear liquid color in step (2) becomes blueness, and in step (3), clear liquid color becomes glassy yellow and represents in testing sample containing warm-mixing agent; If the clear liquid color in step (2) becomes blue, in step (3), clear liquid color also becomes blueness, represents in testing sample not containing warm-mixing agent; If clear liquid nondiscolouring or occur that the change (comprise light green color, blackish green etc.) of non-blueness represents in testing sample not containing warm-mixing agent in step (2).
Principle of the present invention is extraction and indicator colour developing: with isopropyl alcohol, the warm-mixing agent in warm-mixed asphalt is extracted, heating contributes to accelerating this process, and then indicator and warm-mixing agent react and generate blue material, so clear liquid becomes blueness; Certainly also can the extracting substances be dissolved in pitch in isopropyl alcohol out in this process, presenting yellow material is some components in pitch, even if not containing warm-mixing agent, pitch itself adds isopropyl alcohol heating also can present this phenomenon of flavescence look, and the material that indicator detects is clear, colorless in isopropyl alcohol.
Direct interpolation indicator can cause indicator consumption excessive, and the color of indicator can disturb the judgement of color, affects testing result; The object of indicator solvent dilution reduces its concentration exactly, even if like this, its consumption can not be too much when in use, 5 at most only, otherwise affect testing result.
Therefore micro-ly in step (1) boil in light yellow, illustrate that the heat time is not long (if the heat time is long, dark colour material in pitch also can be extracted out, thus the judgement of interference color), the amount extracting warm-mixing agent is like this less, and warm-mixing agent has certain volatility, and in step (3), clear liquid is through long-time continuous heating, warm-mixing agent evaporates, and therefore indicator is only the color after indicator color and clear liquid color addition after adding.
Beneficial effect of the present invention is as follows:
1 the invention provides the detection method that in warm-mixed asphalt, whether warm-mixing agent exists.
Less demanding to experimental apparatus, equipment and testing staff in 2 the present invention, testing cost is low, has higher practical value.
3 inventors have carried out the mensuration of mass data to detection method, and this detection method service condition is good, illustrates that test method of the present invention is rational, reliable, practical.
Embodiment
Below in conjunction with embodiment, the present invention will be further described.
Embodiment 1
In a kind of warm-mixed asphalt, warm-mixing agent detects reagent, is made up of the component comprising following weight portion
Isopropyl alcohol (100ml), bromophenol blue: 0.2g.
Adopt warm-mixing agent in above-mentioned warm-mixed asphalt to detect reagent to detect certain warm-mixed asphalt, comprise the following steps:
(1) take 1g warm-mixed asphalt in beaker, then add 50ml isopropyl alcohol, be heated to isopropyl alcohol and be slight boiling condition and color becomes light yellow;
(2) poured out by the supernatant liquor in step (1), and add 5 detection reagent, observe the color change of clear liquid, clear liquid color becomes blueness;
(3) poured out by the supernatant liquor in step (1), and clear liquid is boiled in heating, keep fluidized state 2min, then instillation detects reagent, and observe the color change of clear liquid, clear liquid color becomes glassy yellow;
(4) represent in testing sample containing warm-mixing agent.
Conclusion: conform to the fact being added with oil-soluble amine surfactant type warm-mixing agent.
Embodiment 2
In a kind of warm-mixed asphalt, warm-mixing agent detects reagent, is made up of the component comprising following weight portion
Isopropyl alcohol (100ml), bromophenol blue: 0.3g.
Adopt warm-mixing agent in above-mentioned warm-mixed asphalt to detect reagent to detect certain warm-mixed asphalt, comprise the following steps:
(1) take 0.5g warm-mixed asphalt in beaker, then add 40ml isopropyl alcohol, be heated to isopropyl alcohol and be slight boiling condition and color becomes light yellow;
(2) poured out by the supernatant liquor in step (1), and add 5 detection reagent, observe the color change of clear liquid, clear liquid color becomes blueness;
(3) poured out by the supernatant liquor in step (1), and clear liquid is boiled in heating, keep fluidized state 1min, then instillation detects reagent, and observe the color change of clear liquid, clear liquid color becomes blueness;
(4) represent in testing sample not containing warm-mixing agent.
Conclusion: conform to the fact not being added with oil-soluble amine surfactant type warm-mixing agent.
Embodiment 3
In a kind of warm-mixed asphalt, warm-mixing agent detects reagent, is made up of the component comprising following weight portion
Isopropyl alcohol (50ml), bromophenol blue: 0.08g.
Adopt warm-mixing agent in above-mentioned warm-mixed asphalt to detect reagent to detect certain warm-mixed asphalt, comprise the following steps:
(1) take 1.5g warm-mixed asphalt in beaker, then add 50ml isopropyl alcohol, be heated to isopropyl alcohol and be slight boiling condition and color becomes light yellow;
(2) poured out by the supernatant liquor in step (1), and add 5 detection reagent, observe the color change of clear liquid, clear liquid color becomes glassy yellow.
(3) represent in testing sample not containing warm-mixing agent.
Conclusion: conform to the fact not being added with oil-soluble amine surfactant type warm-mixing agent.
Claims (8)
1. a containing oil soluble amine surfactants warm-mixing agent detection method in warm-mixed asphalt, comprises the following steps:
(1) take testing sample, and add solvent, be heated to solvent and be slight boiling condition and color becomes light yellow;
(2) supernatant liquor in step (1) is poured out, and instillation detects reagent, observe the color change of clear liquid;
(3) poured out by the supernatant liquor in step (1), and heat clear liquid, then instillation detects reagent, observes the color change of clear liquid,
(4) judge whether containing oil-soluble amine surfactant type warm-mixing agent in testing sample according to step (2) and step (3),
Described detection reagent is the bromophenol blue indicator be dissolved in neutral organic solvent.
2. detection method according to claim 1, described detection reagent is composed of the following components: 10 ~ 100ml isopropyl alcohol, 0.02 ~ 3.0g bromophenol blue.
3. detection method according to claim 2, described isopropyl alcohol is pure for analyzing.
4. detection method according to claim 1, in described step (1), the addition of testing sample is 0.1-2.0g; The addition of solvent is: 10-200ml.
5. detection method according to claim 4, the solvent in described step (1) is isopropyl alcohol.
6. detection method according to claim 2, the addition detecting reagent in described step (2) is that 3-5 drips.
7. detection method according to claim 6, the heat time in described step (3) is 1-3min, and the addition detecting reagent is that 3-5 drips.
8. detection method according to claim 1, in described step (4) in testing sample containing oil-soluble amine surfactant type warm-mixing agent be whether: the clear liquid color in step (2) becomes blueness, and in step (3), clear liquid color becomes glassy yellow and represents in testing sample containing warm-mixing agent; If the clear liquid color in step (2) becomes blue, in step (3), clear liquid color also becomes blueness, represents in testing sample not containing warm-mixing agent; If clear liquid nondiscolouring or occur that the change of non-blueness represents in testing sample not containing warm-mixing agent in step (2).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105806747A (en) * | 2016-02-24 | 2016-07-27 | 北京建筑大学 | Asphalt-aggregate interface adhesion property testing method |
| CN114062352A (en) * | 2020-08-04 | 2022-02-18 | 中国石油天然气股份有限公司 | Method for identifying warm mixing agent containing amine surfactant in asphalt |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114062352A (en) * | 2020-08-04 | 2022-02-18 | 中国石油天然气股份有限公司 | Method for identifying warm mixing agent containing amine surfactant in asphalt |
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