Refractory clay mortar shear bond strength detection method

Abstract

The invention discloses a refractory clay mortar shear bond strength detection method. The method comprises the following steps: preparing refractory bricks; preparing refractory clay mortar; positioning a testing test-piece; constructing the testing test-piece; drying; measuring the area of bond areas; performing shear load pressure testing; calculating the shear bond strength. According to the method, a special-made clamp is used for positioning and forming, so that the thickness of each clay mortar seam and the parallelism between the upper end and the lower end can be accurately controlled, the lower end surfaces of a left refractory brick and a right refractory brick are in the same plane, the normalization during test-piece bonding is ensured, and the sample preparation is simple and convenient; the refractory bricks do not need cutting, or only need simple processing, the bonding manner is consistent with that in a field during construction, the thickness of a refractory clay mortar layer is accurately controlled, and the detection result is high in accuracy, and has instructive significance.

Description

technical field [0001] The invention belongs to the field of refractory materials, in particular to a method for detecting the shear bonding strength of refractory mud. Background technique [0002] Refractory mud is the basic material for refractory masonry of industrial kilns, and it is filled between the brick joints to bond the refractory bricks to each other into a whole. In the process of masonry, good shear bond strength is an important guarantee for the masonry not to be distorted and deformed, and not to fall sideways; The test of high temperature load, especially the large pressure difference inside and outside many high temperature kilns, these pressure differences will cause the refractory masonry to bear a large shear force, so the shear bond strength of refractory mud is an important indicator , measuring the shear bond strength of refractory mud has practical guiding significance. [0003] At present, domestic testing standards use two L-shaped refractory br...

AI Technical Summary

Problems solved by technology

However, the pressure testing machines commonly used in refractory laboratories are basically above 10KN. If a pressure testing machine with a range below 5KN is configured separately, it will cause a certain degree of waste of resources.

At the same time, after processing into an L-shaped test, the cutting surface of the refractory brick test block is used for the bonding surface, which is also inconsistent with the original brick surface used in the actual masonry, resulting in inaccurate measurement results

Therefore, the value measured by this method cannot guide the actual production

In addition, refractory bricks have high hardness, and it is difficult to cut them into L-shaped samples.

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