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Compound extractant for content detection of soluble substance in elastomer modified asphalt waterproof membrane and detection method

A technology of asphalt waterproof membrane and composite extractant, which is applied in the field of composite extractant and elastomer modified asphalt waterproof membrane soluble content detection, which can solve the anesthesia effect of the central nervous system, trigeminal nerve damage, and long extraction time etc. to achieve the effects of low temperature, shortened extraction time and high extraction rate

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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  • 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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  • Compound extractant for content detection of soluble substance in elastomer modified asphalt waterproof membrane and detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Preparation of composite extractant: mix according to the mass ratio of ethylene glycol dimethyl ether and 2,4-dimethylpentane of 1:3, and prepare a composite 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 compound extractant is 1 / 2~2 / 3 of the capacity of the flask, heat and extract in a water bath, and extract until the refluxing compound extractant turns light for the first time, be careful Take out the filter paper bag without breaking it, and place it in the air for more than 30 minutes to volatilize the compo...

Embodiment 2

[0031] Example 2 and Example 1 have the same preparation and extraction method of the test piece, the difference is: when preparing the composite extractant, the mass ratio of ethylene glycol dimethyl ether to 2,4-dimethylpentane is 1:3.5. Mix and prepare compound 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 composite extractant, the mass ratio of ethylene glycol dimethyl ether to 2,4-dimethylpentane is 1:4. Mix and add 0.1% trifluoroethanol to the total mass of ethylene glycol dimethyl ether and 2,4-dimethylpentane to prepare a composite extractant. The test results are shown in Table 1.

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Abstract

The invention discloses a compound extractant for content detection of a soluble substance in an elastomer modified asphalt waterproof membrane and a detection method, belonging to the technical fieldof building material detection. The compound extractant contains glycol dimethyl ether and 2, 4-dimethylpentane, wherein the mass ratio of the glycol dimethyl ether and the 2, 4-dimethylpentane is 1:3-4. A mixed solvent of glycol dimethyl ether and 2, 4-dimethylpentane replaces trichloroethylene and is used as an extractant, and a test result and repeatability similar to a test result and repeatability of trichloroethylene are obtained; all components are low-toxic or non-toxic, thereby being more environment-friendly; boiling points of the two components are approximate, and the compound extractant can highly extract the SB modified material in the waterproof membrane, and shortens extraction time effectively

Description

technical field [0001] The invention belongs to the technical field of building material detection, and in particular relates to a composite extractant 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 el...

Claims

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Application Information

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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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