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Method for measuring asphalt content and asphalt-aggregate ratio in asphalt mixture

A technology for asphalt mixture and asphalt content, which is applied in the direction of weighing by removing certain components, can solve problems such as potential safety hazards, the accuracy of test results needs to be improved, and errors, and achieves convenient operation, low test cost, and high accuracy. high effect

Inactive Publication Date: 2018-10-23
XIAN HIGHWAY INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method needs to use gasoline to burn, which has certain potential safety hazards. In addition, the test has certain errors, and the accuracy of the test results needs to be improved.

Method used

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  • Method for measuring asphalt content and asphalt-aggregate ratio in asphalt mixture
  • Method for measuring asphalt content and asphalt-aggregate ratio in asphalt mixture
  • Method for measuring asphalt content and asphalt-aggregate ratio in asphalt mixture

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Embodiment

[0077] The invention provides a method for determining the asphalt content and the asphalt ratio in an asphalt mixture. The raw materials and equipment used in the determination method include:

[0078] Asphalt mixture sample: Marshall test piece or asphalt pavement cut (clean and dust-free) 3kg~5kg;

[0079] Trichlorethylene: analytically pure;

[0080] Closed electric furnace: adjustable temperature control, 1000w;

[0081] Hot blast drying oven: adjustable temperature control, 1500w;

[0082] Electronic analytical balance: precision 0.1mg, maximum capacity 210g;

[0083] Electronic balance: precision 0.01g, maximum capacity 5000g;

[0084] Centrifuge: The highest speed is 16500r / min.

[0085] The test steps of the assay method include:

[0086] Step 1. Take about 1 kg of the prepared asphalt mixture sample (Marshall test piece or asphalt pavement cut), weigh it accurately, and record the mass as m 0 , precision 0.01g;

[0087] Step 2. Put the weighed asphalt mixture ...

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Abstract

The invention discloses a method for measuring asphalt content and asphalt-aggregate ratio in an asphalt mixture. The method includes: weighing the mass m0 of an asphalt mixture sample, heating the weighed asphalt mixture sample in a drying oven, crushing the heated asphalt mixture sample, and cooling to normal temperature; sealing, standing, stirring until asphalt of the asphalt mixture sample iscompletely dissolved, taking liquid on the upper portion, filling into a centrifugal tube, and centrifuging; weighing the mass m2 of an evaporating dish; pouring supernate in the centrifugal tube after centrifuging into the evaporating dish, and weighing the mass m3 of the supernate poured into the evaporating dish; heating the evaporating dish with the supernate in a sealed electric furnace, drying in a drying oven, cooling the evaporating dish in a dryer until the evaporating dish reaches normal temperature, weighing the mass of the cooled evaporating dish, and recording the mass as m4; calculating the asphalt content and asphalt-aggregate ratio in the asphalt mixture according to the m0, m1, m2, m3 and m4.

Description

technical field [0001] The invention relates to the technical field of road engineering design and construction, in particular to a method for measuring asphalt content and asphalt ratio in an asphalt mixture. Background technique [0002] The existing detection methods of asphalt mixture mainly include centrifugal extraction method and combustion method. [0003] The centrifugal extraction method is to extract the asphalt mixture with a solution, and then remove the solvent in the extract. After the centrifugal extraction is completed, a certain amount of the solution is extracted, evaporated to dryness on a hot bath, and then placed in Burn into a residue in a combustion furnace, add a saturated solution of ammonium carbonate and let it stand for 1 hour, then put it into an oven to dry, the test operation is complicated, and the time required for the test is long; the centrifugal extraction method uses a large amount of trichlorethylene, and trichlorethylene is Flammable ...

Claims

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Application Information

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IPC IPC(8): G01N5/04
CPCG01N5/04
Inventor 弥海晨郭彦强韩瑞民马文斌弓锐徐鹏马志刚
Owner XIAN HIGHWAY INST
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