CN105115851A - Method for detecting asphalt content in asphaltic sand mixture - Google Patents

Abstract

The invention discloses a method for detecting asphalt content in an asphaltic sand mixture. The method comprises the following steps: (1) putting a filter cartridge into a drying oven, drying the filter cartridge to achieve the constant weight, and weighing the mass M1 of the filter cartridge to reach the precision of 0.01; (2) selecting 300g of asphaltic sand mixtures; (3) filling the filter cartridge with the asphaltic sand mixtures; weighing the mass M2 to reach the precision of 0.01; (4) putting the filter cartridge into a distilling flask, and starting an electrothermal furnace to heat solution until the solution is slightly boiled; (5) connecting a water pipe, cooling the boiled solution steam, and thus rapidly cooling the solution which forms steam and washing the asphaltic sand mixtures until the solution flowing out from the bottom of the filter cartridge is clear and transparent; (7) switching off a power supply and a water source, after the solution is cooled, putting the cooled solution into the drying oven until the constant weight is reached, and weighing the mass M3 to reach the precision of 0.01; and (8) arranging a test instrument. The method is characterized in that the proportion and the asphalt content can be adjusted precisely and reliably when asphalt content needs to be detected in the construction site and the mixing of a mixing station needs to be guided.

Description

A kind of method detecting tar sand compound Asphalt Content

Technical field

The invention belongs to bitumen content detection technique field, particularly relate to a kind of method detecting tar sand compound Asphalt Content.

Background technology

Tar sand compound under high-temperature heating state, fully mixes mixing by the sand material of several particle diameter and a certain proportion of pitch to form.The advantages such as tar sand surface fine, attractive in appearance, good waterproof performance, plasticity is strong, it is comfortable to drive a vehicle and noise is little, the asphalt sand pavement of making in basic unit has good practicality; Can be used to the front cover doing old road surface, to improve the road conditions on original road surface, extend the serviceable life on original road surface; Also can making on other newly-built asphalt mats, do waterproofing cover use; The regions such as the residential road in city, walkway, bicycle lane, tennis court, parking lot, all kinds of squares, use pitch than bituminous concrete and other asphalt sand making surface layers are more economical, applicable.

Lack or cost intensive at crushed stone material, but the abundant and exploitation of natural sand material, transportation cost lower ground district, build the good approach that asphalt sand pavement is development bituminous pavement;

Than other hot asphalt mixture surface layers of making on the road of applicable making tar sand surface layer, can saving construction cost, reduce costs.In Cote d'lvoire through market survey, analysis, under the same terms, select tar sand surface layer can saving construction cost about 20% ~ 25% than asphalt concrete pavement;

Asphalt sand pavement seldom uses on the highway of China's highway and other grades, and therefore the domestic usability to tar sand of China, usable range and detection method are all fewer, and do not form standard.Domestic detection bitumen content generally adopts centrifugal extraction process and combustion method, for centrifugal extraction process and combustion method, be more suitable for the detection of bitumen aggregate ratio in the LSAM such as asphalt, asphalt macadam, tar sand is because particle is thin, powder is many, bitumen content is large, so adopt the method such as extracting and combustion method can cause larger error to test findings, affect the control of tar sand mixing station and the construction on road surface.Cote d'lvoire's asphalt sand pavement that my company undertakes the construction of, because this national tar sand compound use amount is large, and service time is long, therefore have certain experience to the research of tar sand, but this state is backward in economy, long-term civil war causes also resting on the primary stage to the research of tar sand, does not continue development.

Summary of the invention

The object of the present invention is to provide a kind of method detecting tar sand compound Asphalt Content, to solve the problem proposed in above-mentioned background technology.

For achieving the above object, present invention employs following technical scheme:

Detect a method for tar sand compound Asphalt Content, comprise the following steps:

1) cartridge filter is placed baking box to dry to constant weight, claim its mass M 1 to be accurate to 0.01;

2) tar sand compound 300g is chosen;

3) tar sand compound is loaded in cartridge filter, claim its mass M 2 to be accurate to 0.01;

4) cartridge filter that asphalt is housed is put into cucurbit, open electrothermal furnace heated solution, boil until solution is micro-, and keep slight boiling condition;

5) connect water pipe, water is flow through in the interlayer of double-deck cucurbit, cool the solution vapor of having seethed with excitement, the solution of formation steam cools rapidly the tar sand compound in flushed filter cylinder, till the solution flowed out bottom filter cylinder is as clear as crystal;

6) powered-down and water source, after solution cooling, takes out cartridge filter, puts into 105 ± 5 DEG C of baking boxs and dry to constant weight, weigh its mass M 3 and be accurate to 0.01;

7) place test apparatus, prevent solution evaporation, treat that next time uses.

Preferably, in step 5), the top of double-deck cucurbit is bimetallic tube, the capacity of to be capacity be in bottom 1000-2000ml.

Compared with prior art, beneficial effect of the present invention is as follows:

The present invention, by the triclene solution in electrothermal furnace heating cucurbit, forms water droplet after the gas that solution is evaporated cooling, repeatedly rinses the asphalt thickeied in cartridge filter, finally reach the object of extraction pitch.Simple to operate, process of the test free of losses and bitumen content can be differentiated accurately.The method detects bitumen content accurately and cost is low, and detecting solution can reuse, and is that working-yard needs to regulate when detecting bitumen content and instruct mixing station mix proportioning and bitumen content accurately method reliably.

Embodiment

Below in conjunction with embodiment, optimal way of the present invention is described in further detail.

Detect a method for tar sand compound Asphalt Content, comprise the following steps:

1) cartridge filter is placed baking box to dry to constant weight, claim its mass M 1 to be accurate to 0.01.

2) tar sand compound 300g is chosen.

3) tar sand compound is loaded in cartridge filter, claim its mass M 2 to be accurate to 0.01.

4) cartridge filter that asphalt is housed is put into cucurbit, open electrothermal furnace heated solution, boil until solution is micro-, and keep slight boiling condition.

5) water pipe is connected, water is flow through in the interlayer of double-deck cucurbit, cool the solution vapor of having seethed with excitement, the solution of formation steam cools rapidly the tar sand compound in flushed filter cylinder, till the solution flowed out bottom filter cylinder is as clear as crystal, wherein, the top of double-deck cucurbit is bimetallic tube, the capacity of to be capacity be in bottom 1000-2000ml.

6) powered-down and water source, after solution cooling, takes out cartridge filter, puts into 105 ± 5 DEG C of baking boxs and dry to constant weight, weigh its mass M 3 and be accurate to 0.01.

7) place test apparatus, prevent solution evaporation, treat that next time uses.

For the difference detecting bitumen content method both at home and abroad, the advantage adopting the method is described below:

As can be seen here, combustion method is only applicable to asphalt macadam, although do not need solution, but need high test temperature, and due to the temperature of burning high, speed is fast, needs suction device in combustion, so some fine grained will be emitted by as burned pitch, thus very big error is caused to test findings.

For extraction process, very not high temperature, but be only applicable to asphalt macadam, and need the solution of at substantial, increase experimentation cost, extraction process by the high-speed rotation of centrifugal separator, solution is separated, through soaking flushing repeatedly several times, pitch is dissolved discharge completely, in process of the test, fringe is existed for the whether consoluet identification of pitch, sometimes can there is mistake and distinguish, so produce error to test findings.

For micro-method of boiling, the cucurbit of test is that glass makes, and makes the observation and comparison for process of the test clear, easily distinguishes the dissolution degree of pitch, grasp test period more accurately, use the amount of solution relatively less, and can reuse, so just more can save material greatly, in addition, it is the compound with thick filter paper wound packages, without any loss in process of the test, so test findings is more accurate.This kind of method can grasp bitumen content comparatively accurately, more reasonably instructs mixing station to control asphalt content, exchanges trial batch station and checks bitumen content to have larger degree of accuracy, be worth applying on a large scale.

Above embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determines.

Claims (2)

1. detect a method for tar sand compound Asphalt Content, it is characterized in that, comprise the following steps:

1) cartridge filter is placed baking box to dry to constant weight, claim its mass M 1 to be accurate to 0.01;

2) tar sand compound 300g is chosen;

3) tar sand compound is loaded in cartridge filter, claim its mass M 2 to be accurate to 0.01;

4) cartridge filter that asphalt is housed is put into cucurbit, open electrothermal furnace heated solution, boil until solution is micro-, and keep slight boiling condition;

5) connect water pipe, water is flow through in the interlayer of double-deck cucurbit, cool the solution vapor of having seethed with excitement, the solution of formation steam cools rapidly the tar sand compound in flushed filter cylinder, till the solution flowed out bottom filter cylinder is as clear as crystal;

6) powered-down and water source, after solution cooling, takes out cartridge filter, puts into 105 ± 5 DEG C of baking boxs and dry to constant weight, weigh its mass M 3 and be accurate to 0.01;

7) place test apparatus, prevent solution evaporation, treat that next time uses.

2. the method for detection tar sand compound Asphalt Content according to claim 1, is characterized in that, the top of double-deck cucurbit described in step 5) is bimetallic tube, the volumetric flask of to be capacity be in bottom 1000-2000ml.