Preparation method and application of asphalt test piece

Abstract

The invention relates to a preparation method and application of an asphalt test piece. The preparation method for the asphalt test piece comprises the following steps: fusing asphalt and uniformly mixing the fused asphalt and a filling material so as to obtain an asphalt mixture, wherein a weight ratio of the asphalt to the filling material is 1: 1.5 to 1: 2.4; preparing an asphalt mixture bar-shaped material with a length of 80 to 200 mm in a die from the asphalt mixture; and winding a 60-mesh to 300-mesh metal net on the external surface of the asphalt mixture bar-shaped material so as to obtain the asphalt test piece. The invention provides a testing method which better accords with an actual state of the asphalt during combustion of the asphalt mixture and better embodies flame retardation performance of albanite during combustion of pavement asphalt, and the asphalt test piece is applicable to testing of flame retardation performance of any road asphalt and does not pollute analytical equipment and a work environment.

Description

technical field [0001] The invention relates to a method for preparing an asphalt test piece and its application in a method for testing special performance indicators, in particular to a method for testing the flame retardancy 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 development trend of tunnel pavement. However, during the use of tunnel asphalt pavement, the fire caused by traffic accidents is a problem that must be paid attention to during the use of tunnel asphalt pavement. A traffic accident in the tunnel caused the asphalt pavement to catch fire. Due to the rapi...

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Problems solved by technology

At present, in this field, glass fiber felt is used to make asphalt specimens to detect oxygen index, because when glass fiber felt is used to prepare asphalt specimens, glass fibers only play a supporting role, and the detection of oxygen index by simply burning asphalt cannot reflect well on the one hand. The burning process of road asphalt, on the other hand, will cause serious pollution to the testing equipment during the testing process, which will bring great inconvenience to the testing work

At the same time, the glass fiber mat is not suitable for the determination of the limiting oxygen index of high-viscosity asphalt

[0011] CN101581711A mentions a method for testing the flame retardant performance of asphalt. Although this method can reflect the burning process of road asphalt, it is not suitable for testing the flame retardant performance of ordinary road asphalt due to the small amount of mineral material added and no protective measures. , seriously contaminates the test instrument during the test

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