A test mold capable of realizing constant temperature at the bottom of the rutting specimen

Abstract

The invention discloses a test mold for realization of bottom constant temperature of a rutting test piece. The test mold comprises a temperature controlling bottom mold, a sealing cover plate (3) and test mold side plates (1), and the temperature controlling bottom mold, the sealing cover plate (3) and the test mold side plates (1) are arranged in bottom-up order. Through holes (12) of the temperature controlling bottom mold, through holes (13) of the sealing cover (3) and threaded hole (14) of the test mold side plates (1) are at the position which are matching in one-to-one correspondence, and are fixedly connected through inner hexagon screws. In the temperature controlling bottom mold, a water pipe loop is formed through constant temperature water channels (5) and the like. The test mold is very effective for realization of bottom constant temperature of the rutting test piece, has obvious technology advantages in design, and is beneficial for realization of precise temperature control of bottom surface of the rutting test piece. Constant temperature circulating water is in a closed environment, and does not affect the environment box temperature. The uniformity of the under bearing layer of the test piece is guaranteed. The test mold can maintain good entirety, does not affect molding of the rutting test piece, has simple structure and low cost, and is convenient to manufacture.

Description

technical field [0001] The invention belongs to the technical field of indoor test instruments for performance evaluation of highway asphalt pavement, and specifically relates to a test mold capable of realizing constant temperature at the bottom of a rutting test piece, in order to provide an asphalt mixture test for realizing the rutting resistance performance evaluation test of asphalt pavement structure. The technical scheme of the constant temperature design of the bottom of the rutting specimen realized by the temperature gradient of the rutting specimen. Background technique [0002] The rapid development of my country's economy has led to a substantial increase in traffic flow, the traffic channelization of expressways and first-class roads, and the situation of overloading and heavy loading has intensified. In addition to the rare and continuous high temperature in summer, the rutting problem has become a prominent problem affecting the healthy development of my coun...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the mutual influence between the temperature of the environmental box and the temperature of the circulating water bath in the rutting test, it is difficult to ensure uniform support when the test mold is placed on the supporting steel bar, and the test pieces within a certain range from the bottom surface of the test mold are kept the same In order to provide a constant temperature design for the bottom of rutting specimens to realize the temperature gradient of asphalt mixture specimens in the anti-rutting performance evaluation test of asphalt pavement structures The technical scheme achieves good integration of the rutting test mold, can control the constant temperature of the bottom of the test piece, and is convenient and easy to use.

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