A laboratory Marshall test piece mixing and charging integrated device

Abstract

The invention discloses a blending and charging integrated device of a Marshall test piece in a test room. The blending and charging integrated device comprises a blending pot, a bracket, a base, a shaft rod, a stirring motor, a retractable stirring blade, a charging system, a control panel and a power supply for supplying electric energy, wherein the blending pot is fixedly arranged on the bracket; the charging system comprises a top-layer round disc, a bottom-layer tray, a plurality of Marshall test molds and a plurality of connection rods for connecting the top-layer round disc and the bottom-layer tray. The blending and charging integrated device disclosed by the invention can effectively finish preparation of the plurality of Marshall test pieces in one step.

Description

technical field [0001] The invention belongs to the technical field of asphalt mixture mixing equipment, and relates to a laboratory Marshall test piece mixing and charging integrated device. Background technique [0002] As a composite material, asphalt mixture is composed of coarse aggregate, fine aggregate, asphalt, mineral powder and fiber, etc. It is an important material for paving asphalt pavement. Among them, the mixing of the mixture is a very important link, and the uniformity of the mixing greatly affects the quality of the mixture. In the laboratory, the asphalt mixture is mixed by mixing equipment, loaded, and compacted to form Marshall specimens for experimental research, which can more appropriately reflect the road performance of the material. The degree of uniformity is more sensitive. At the same time, in order to meet the needs of various comparative parallel tests, there is an urgent need for equipment that can efficiently mass-produce Marshall test pie...

AI Technical Summary

Problems solved by technology

[0003] However, the existing asphalt mixing equipment is more suitable for the preparation of rut slabs, and its disadvantages are more serious for the preparation of Marshall specimens

First of all, because the Marshall test piece requires less raw materials, and the stirring motor is located at the upper end of the mixing pot, the raw materials at the bottom cannot be completely evenly mixed, resulting in agglomeration and segregation

Therefore, it is actually necessary to manually use a shovel to stir fry and stir in the mixing pot, which is time-consuming and laborious. At the same time, the temperature of the pot wall is high, which is easy to burn the skin

When multiple raw materials of Marshall specimens are put into the mixing pot for mixing and charging at the same time, due to the segregation of aggregates, the coarse aggregate in the upper layer is too much and the coarse aggregate in the lower layer is too small, resulting in the coarse aggregate of the initial specimen being charged. Too much, the stability is too high, the subsequent test pieces have too much fine aggregate, the stability is too small, and the test results have a large deviation

Therefore, in fact, only a single sample material can be mixed, and then shoveled out into the test mold with a shovel, which is extremely inconvenient

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