Method for testing flame retardant property of asphaltum

A test method and flame retardant performance technology, which is applied in the field of asphalt flame retardant performance testing, can solve problems such as the inability to reflect the combustion process of road asphalt well, and achieve the effects of easy research, simple process, and low requirements for production equipment

Inactive Publication Date: 2009-11-18
SHENZHEN OCEANPOWER NEW MATERIALS TECH
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AI Technical Summary

Problems solved by technology

At present, the industry uses glass fiber felt to make asphalt samples to detect the oxygen index, because when the glass fiber felt is used to prepare th

Method used

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  • Method for testing flame retardant property of asphaltum
  • Method for testing flame retardant property of asphaltum
  • Method for testing flame retardant property of asphaltum

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example 1

[0044] Example 1: Preparation of flame-retardant asphalt sample by glass fiber mat method

[0045] a. Weigh the molten asphalt and stir it at a constant speed at a constant temperature of about 160°C;

[0046] b. Weigh the asphalt flame retardant modifier (refer to Table 3 for the amount of the asphalt flame retardant modifier), and add it to the asphalt in step a and stir evenly. After completion, continue to stir for 0.5h, and keep the temperature at about 160°C, then Cut for 50min;

[0047] c. Cut a piece of 140×140 glass fiber mat with a weight of (8±0.5) g, place it horizontally on a glass plate coated with a release agent, and pour (80±2) g of the above-mentioned asphalt on the glass evenly fiber mat;

[0048] d. After cooling to room temperature, cut it into 80-120mm long and (6.5±0.5)mm wide samples, and each group of samples should not be less than 15 pieces.

example 2

[0049] Example 2: Adopt the method of the present invention (mineral powder method) to prepare flame-retardant asphalt sample

[0050] (i) Weighing the molten pitch and stirring at a constant speed at a constant temperature of about 160°C;

[0051] (ii) be 1: 1 to take by weighing mineral powder by the rubber powder ratio (weight ratio) of asphalt and mineral powder, and take by weighing asphalt flame retardant modifier (the amount of asphalt flame retardant modifier is referred to Table 3), asphalt Add the flame retardant modifier to the asphalt in step i and stir evenly. After completion, continue to stir for 0.5h to fully dissolve the asphalt flame retardant modifier masterbatch. Keep the temperature at about 160°C, and then cut for 50 minutes;

[0052] (iii) Add mineral powder and stir evenly, cool to about 60°C, roll it into a stainless steel mold with a width of 10mm, a length of 340mm, and a thickness of 5mm and take it out;

[0053] (iv) After cooling to room temperat...

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Abstract

The invention discloses method for testing the flame retardant property of asphaltum. In the invention, asphaltum mixture with the powder-binder ratio of asphaltum and filling of 1:0.8-1.2 is prepared to asphaltum sample bands with the length of 80-150 mm, 15 asphaltum sample bands form a group, and oxygen index inspection test is carried out on one group of the asphaltum sample bands. The asphaltum sample bands made by the method provided by the invention for test have simple process, low requirement for production devices and are convenient for research, are in keeping with the practical state of asphaltum when the asphaltum mixture burns during test of the asphaltum oxygen index, and can well incarnate the burning process of pavement asphaltum. The asphaltum oxygen index tested by the method can really and accurately measure and reflect the flame retardant property of the asphaltum, and provides evaluation basis for research and application effect of flame retardant property modifying agents of the asphaltum.

Description

technical field [0001] The invention relates to a method for testing special performance indexes of asphalt, in particular to a method for testing the flame-retardant performance of asphalt. Background technique [0002] With the development of expressways in our country, the number of highway tunnels is also increasing. Because cement concrete has better water resistance and flame retardancy, cement pavement is still mainly used for tunnel pavement so far. However, with the improvement of road quality requirements, smooth, wear-resistant, low-noise asphalt pavement replaces cement concrete pavement and gradually becomes the mainstream of tunnel pavement development. Article 15.3 of "Code for Design of Highway Tunnels" (JTGD70-2004) stipulates: "Highway tunnels at all levels can use cement concrete pavement, and if necessary, can use asphalt surface structure with good flame retardancy, good photoelectric lighting, and good reflective properties. ". Therefore, it has becom...

Claims

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Application Information

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IPC IPC(8): G01N31/12G01N33/42
Inventor 蔡丽丽徐世国何唯平
Owner SHENZHEN OCEANPOWER NEW MATERIALS TECH
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