Test method for shear bond strength of refractory mud

Abstract

The invention discloses a method for detecting the shear bonding strength of refractory mud, comprising the following steps: preparation of refractory bricks; preparation of refractory mud; positioning of test specimens; masonry test specimens; drying; measuring the area of ​​the bonding surface; Shear load pressure test; calculation of shear bond strength. The invention uses a special fixture for positioning and molding, which can precisely control the thickness of the mud joint and the parallelism of the upper and lower end faces, so that the lower end faces of the left and right refractory bricks are on the same plane, ensuring the standardization of the bonding test pieces, and the sample preparation is simple; refractory Bricks do not need to be cut or simply processed, the bonding method is consistent with the on-site construction, the thickness of the refractory mud layer is precisely controlled, and the detection results are highly accurate and have guiding 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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