Fiber neat paste test piece forming method for scanning microscope

Abstract

The invention belongs to the field of microscopic tests of micro nano mechanics and fiber concrete and mainly relates to a fiber neat paste test piece forming method for a scanning microscope. The fiber neat paste test piece forming method is mainly characterized by comprising the steps: engraving upper moulds and bottom plates in shapes of three test pieces by using a laser engraving machine; filling the grooves in the bottom plate by using cement neat paste successively, putting fibers in parallel on the surfaces of the filled grooves along the length directions of the grooves, correspondingly placing the upper moulds on the bottom plates, filling through grooves by using neat concrete paste, and curing for multiple days. The fiber neat paste test piece forming method is simple in process and safe in operation. The fiber neat paste test piece forming method has the beneficial effects that (1) shapes and sizes of test pieces can be automatically designed as required, and the characteristic of diversification is achieved; (2) the test pieces are formed without pouring standard test pieces, thus saving manpower and material resource and reducing energy consumption; (3) a test piece mould can be repeatedly used and is low in cost; and (4), the depth of the fibers is manually controlled, so that the scanning microscope is observed conveniently.

Description

technical field [0001] The invention belongs to the micro-test field of micro-nano mechanics and fiber concrete, and mainly relates to a method for forming a fiber-cleaned slurry test piece for scanning the micro-environment. Background technique [0002] Now, concrete research has gradually shifted from a simple macro performance test to a research method combining macro and micro tests. In the microscopic experiment of fiber-reinforced concrete, it is necessary to study the interaction mechanism between fiber and cement slurry, so as to analyze the contribution of fiber to concrete strength. In the existing microscopic test method, the standard test block is cut to obtain the size and shape required for the experiment. Although this molding method guarantees the original growth environment of the specimen, since concrete is a brittle material and the size of the specimen required for the SEM experiment is small, the cutting process can easily cause damage to the material ...

AI Technical Summary

Problems solved by technology

Although this molding method guarantees the original growth environment of the specimen, since concrete is a brittle material and the size of the specimen required for the SEM experiment is small, the cutting process can easily cause damage to the material and waste of the specimen higher rate

Moreover, it is difficult to guarantee the shape, size and surface smoothness of the test piece when cutting the shaped test piece with a cutting machine, and the shape of the test piece can only be relatively simple.

Due to the limitation of the depth of field of the scanning electron microscope, it is difficult to ensure that the obtained specimens can meet the experimental requirements

When forming standard test pieces, it will also cause unnecessary material waste

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