Fine aggregate crushing value test equipment and test method thereof

Abstract

The invention relates to fine aggregate crush value test equipment and a test method thereof, and belongs to the technical field of road engineering material detection. The fine aggregate crush valuetest equipment comprises machine body, a base and an upper pressure seat; a driving source for driving the upper pressure seat to move up and down is arranged on the machine body, a test mold box is arranged on the base, a compression roller is rotatably arranged on the upper pressure seat, the test mold box is arranged on the base in a sliding manner along an axial direction vertical to the compression roller, and a driving component for driving the test mode box is arranged on the base. During testing, a sample is arranged in the test mold box, the upper pressure seat is driven to move downwards by the driving source, thereby driving the compression roller to be in contact with the sample in the test mold box; then the driving component is started to drive the test mold box to move backand forth, and the pressure of a compression roller is gradually increased until a set value is reached; in the test process, the test mold box moves to enable the compression roller to roll relativeto the sample, and meanwhile, the sample is enabled to be under the action of moving load, so that the force-bearing condition of the sand material under the actual working condition can be well simulated, and the accuracy of the test result is improved.

Description

technical field [0001] The invention relates to the technical field of road engineering material detection, in particular to a fine aggregate crush value test device and a test method thereof. Background technique [0002] Fine aggregate and coarse aggregate are the main raw materials for road engineering. In asphalt mixture, fine aggregate refers to natural sand, artificial sand (including machine-made sand) and stone chips with a particle size of less than 2.36mm; in cement concrete, fine aggregate refers to natural sand and artificial sand with a particle size of less than 4.75mm. sand. [0003] The quality of the fine aggregate directly determines the performance of the road. In order to ensure and control the quality and quality of fine aggregates, the relevant specifications in my country stipulate the mechanical properties of fine aggregates. The crushing value is one of the most important mechanical performance indicators of fine aggregates. It is the percentage o...

AI Technical Summary

Problems solved by technology

However, under actual working conditions, roads are mostly subjected to moving loads, which makes it difficult for traditional crushing value measuring devices to simulate the crushing resistance of sand under actual working conditions, reducing the accuracy of test results

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