Abstract
The article presents the results of a study of impact strength of underground cement materials with different water content activated by mixing water with the addition of high range plasticizers, biocidal agents, pigments, ground quartz, silica fume and fine aggregate. Samples for testing are formed in plates of size 150×100×10 mm. Testing was conducted at impact drop-weight method ASTM D7136. The maximum contact force, contact duration and magnitude of the pulse of the drummer were considered as the test parameters. The good results of the studied parameters showed highly filled plasticized compositions of the new generation. The use of iron oxide with yellow and green glauconitic pigments allows obtaining good results. Activation of the mixing water led to a rise in the maximum contact force in the case of the processing mode of E+М (3–3) while reducing the duration of the contact and the magnitude of the impulse. During the test of the biocidal composites with different biocidal preparations, it was established that the best indicators of the impact strength correspond to materials with the addition of «Teflex Antiplesen».
Highlights
The structures of buildings and constructions may be impacted by shock loads, which lead to premature destruction of the floors of buildings with heavy duty, road and airfield coatings
The actual problem is the creation of cement composites capable of effectively resisting the effects of seismic and shock loads
The parameters of the maximum contact force, duration of contact and impulse value for testing different compositions of cement composites are shown in graphs in relative values with respect to composition 1
Summary
The structures of buildings and constructions may be impacted by shock loads, which lead to premature destruction of the floors of buildings with heavy duty, road and airfield coatings. As the objects of research, materials that relate to the old, transitional and newgeneration concretes were considered [1] together with compositions with modifying structure of cement stone components, as well as formulations with additives of pigments and biocidal preparations.
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