An asphalt mixture trapezoidal beam test piece static pressure forming device and manufacturing method

Abstract

The invention relates to an asphalt mixture trapezoidal beam test piece static pressure forming device and manufacturing method, including a hydraulic system, a pressure control system, a reaction force frame, and a test mold assembly; the reaction force frame stands above a hydraulic jacking rod, and when When the hydraulic jacking rod rises, it can touch the reaction force frame; the mold trial assembly is placed on the top of the hydraulic jacking rod and moves together with the hydraulic jacking rod. The test mold assembly includes an upper indenter, a lower indenter, and a test mold. The test mold is surrounded by two L-shaped structural parts to form a trapezoidal inner cavity, and the two L-shaped structural parts are connected by fastening bolts to form a whole; The shape of the indenter and the lower indenter matches the shape of the inner cavity of the test mold. The present invention changes the rolling forming method of the prior art, only needs mixing-static pressing forming-demolding and cooling maintenance, and the production cycle is short; in addition, the integrity of the static pressing forming test piece is good, and there is no cutting test piece in the prior art The damage caused by the high-frequency vibration at the time to the inside of the test piece, so the present invention is suitable for manufacturing the trapezoidal beam test piece of asphalt mixture.

Description

technical field [0001] The invention relates to an asphalt mixture test piece forming device, in particular to a test piece forming device for testing modulus parameters of asphalt mixture and a manufacturing method thereof. Background technique [0002] In recent years, my country's highway construction has developed rapidly, but due to the increase in traffic load, the early damage to the road surface has become more and more serious, so that the road surface has to be repaired frequently, which not only causes a waste of construction investment, but also brings negative effects on normal social activities Inconvenience. Analyzing the causes of the early diseases of the existing asphalt pavement, many factors have an impact on it, and the type of pavement structure currently used is considered to be one of the main reasons. [0003] Since the construction of highways in our country, the semi-rigid base asphalt pavement structure is generally used, and this structure is pro...

AI Technical Summary

Problems solved by technology

[0011] In order to overcome the defects of the prior art, the present invention provides a device for static pressure molding of asphalt mixture trapezoidal beam specimens such as complex modulus and a manufacturing method of the device. The device improves the specimen forming method in principle, Solve the problems of long production cycle, large size error, poor molding quality, etc.

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