Influence of quantity and quality of the filler on technological damage of beam samples
Journal Title: Вісник Одеської державної академії будівництва та архітектури - Year 2018, Vol 1, Issue 72
Abstract
The influence of the quantity and quality of the filler on the technological damage of beam samples is considered in the article. Physical and technical properties of composite building materials and structures are largely determined by their technological damage. The material acquires hereditary defects during the technological processing, and these defects are an integral part of the sample structure or construction. The directed change of technological damage of building materials and structures will allow to control the physical and technical properties of the material, the nature of cracking and destruction of structures. The studies performed earlier indicate the need for a detailed study of effective technological techniques for regulating hereditary technological damage to concrete by using the filler of the required dispersion. Experimental samples were six samples of beams made of heavy concrete, with different amounts and quality (dispersion) of mineral filler (fine quartz sand). The coefficient of technological damage of beams in area, in transverse and longitudinal lines was determined, and the influence of the amount and dispersion of the filler on their technological damage was revealed. The conducted experiments allowed to continue the study of the coefficient of technological damage for concrete beam samples depending on the quantity and quality of mineral filler. According to the results of the research, the graphs of the dependence of the coefficient of technological damage of concrete on the quantity and quality of the filler have been constructed. Thus, in the study, the change in the dispersion of the filler from coarse to fine grinding leads to a reduction of the technological damage of the samples in all cases, that is, the number of technological cracks decreases. Varying the amount of mineral filler changes the technological damage, both in the direction of increasing and decreasing, and depends on the dispersion of the considered mineral filler sample.However, in these graphs, it is possible to trace the tendency of a general reduction in technological damage with an increase in the amount of mineral filler. Proceeding from this, further studies of the effect of the physical and technical characteristics of concretes of certain compositions on technological damage are promising.
Authors and Affiliations
V. V. , Malakhov, S. М Vykydanets
Keywords
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