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Extraction agent and detection method for soluble substance content detection of elastomer modified asphalt waterproof coiled material

An asphalt waterproofing membrane, body modification technology, applied in the field of building materials testing, can solve the problems of anesthesia in the central nervous system, trigeminal nerve damage, long extraction time, etc., to achieve low temperature, shortened extraction time, and high extraction rate. Effect

Active Publication Date: 2019-04-12
湖北建研科峰工程质量检测有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] According to the current national standard GB / T 328.26-2007, the extraction solvent is trichlorethylene (chemically pure) or other suitable solvents, but the scope and type of other suitable solvents are not given, and trichlorethylene is used as the extraction solvent. Its extraction time is long, and it has an anesthetic effect on the central nervous system, and can also cause damage to the liver, kidney, heart, and trigeminal nerve. Trichlorethylene pollutes the air and water environment very seriously, it is difficult to dilute in water, and it is easy to form accumulation in water

Method used

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  • Extraction agent and detection method for soluble substance content detection of elastomer modified asphalt waterproof coiled material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Preparation of extractant: mix according to the mass ratio of ethylene glycol dimethyl ether and n-ethane at 1:1, and prepare the extractant.

[0026] (2) Specimen preparation: cut the coiled material, and cut 3 square specimens with a size of (100±1)mm×(100±1) on the coiled material at least 100mm from the edge;

[0027] Before the test, the specimen should be placed for at least 20 hours under the conditions of (23±2)°C and a relative temperature of 30% to 70%.

[0028] (3) Wrap the test piece with dry filter paper, tie it up with a thread, and weigh its mass as M 1 ;Put the wrapped test piece into the extractor, the amount of extractant is 1 / 2~2 / 3 of the capacity of the flask, heat and extract in a water bath, extract until the refluxed extractant turns light for the first time, carefully take out the filter paper Do not break the bag, place it in the air for more than 30min to volatilize the extractant; put it in a blast oven at (105±2)°C for 2h, then take it o...

Embodiment 2

[0031] Example 2 is the same as Example 1 in the preparation and extraction of the test piece, the difference is: when the extractant is prepared, it is mixed according to the mass ratio of ethylene glycol dimethyl ether and n-ethane at 1:4, and ethylene glycol is added The total mass of dimethyl ether and n-ethane is 0.5% trifluoroethanol, which is prepared as an extractant. The test results are shown in Table 1.

Embodiment 3

[0033] Example 3 is the same as Example 1 in the preparation and extraction of the test piece, the difference is: when preparing the extractant, mix according to the mass ratio of ethylene glycol dimethyl ether and 2-methylpentane as 1:1, and add The total mass of ethylene glycol dimethyl ether and 2-methylpentane is 1% trifluoroethanol to prepare the extractant. The test results are shown in Table 1.

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Abstract

The invention discloses an extraction agent and detection method for soluble substance content detection of an elastomer modified asphalt waterproof coiled material, and belongs to the technical fieldof building material detection. The extraction agent comprises ethylene glycol dimethyl ether and saturated alkane, the saturated alkane is one of n-hexane or 2-methylpentane, and the mass ratio of the ethylene glycol dimethyl ether to the saturated alkane is 1:(4-1); a mixed solvent of the ethylene glycol dimethyl ether and one of the n-hexane or the 2-methylpentane is adopted as the extractionagent instead of trichloroethylene, the experimental results and repeatability which are similar to the experimental results and repeatability of trichloroethylene are obtained, all components are non-toxic or low-toxic and environmentally friendlier, the extraction rate of a SBS modified material in the waterproof coiled material is high, and the extraction time is shortened effectively.

Description

technical field [0001] The invention belongs to the technical field of building material detection, and in particular relates to an extraction agent and a detection method for detecting the soluble content of elastomer-modified asphalt waterproof coiled materials. Background technique [0002] Elastomer (SBS) modified asphalt waterproof membrane implements the national standard GB18242-2008 "Elastomer Modified Asphalt Waterproof Membrane", which is coated with styrene-butadiene-styrene (SBS) rubber modified asphalt. It is an excellent waterproof material made of glass fiber felt, polyester felt and glass fiber reinforced polyester felt as the base, and isolating material on both sides. It has heat resistance, cold resistance, corrosion resistance, aging resistance and good thermoplasticity. , high tensile strength, high elongation, strong tear resistance and other advantages. [0003] Soluble matter content is an important index to judge and distinguish the quality of elast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/40
CPCG01N1/4055G01N2001/4061
Inventor 张娇龙
Owner 湖北建研科峰工程质量检测有限公司
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