Study of changes of abrasivity in building mixes during the operational period of differential mortar pumps
DOI:
https://doi.org/10.15587/1729-4061.2013.9298Keywords:
mortar pump, abrasivity, sand particles.Abstract
In the design of mortar pumps it is necessary to perform a functional test of assembly units, life tests inclusive. Thereto different workbenches, in which building mortars are applied as objects for transportation, are used. The analysis of operating conditions of details in the pump body revealed that the worst wear occurs just between the rubbing parts. Having undertaken the study, we established the dependence of abrasivity on sand particles’ shape; herewith multiple pass through valve units strengthens them. The reason is that the sand is exposed to crushing. And the longer the use of mortar mix the closed circuit of the workbench is, the more minor parts and sharp parts (which enhance the abrasiveness) appear. This property should be considered when designing and testing mortar pumps, as well as during accelerated life tests.References
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