| Abstract Scope |
In this work the results of chemical modification of concrete by mixtures of two different grain sizes aluminum III oxides in addition to 5, 10, and 15 wt.% of cement amount as a filler were summarized. The reference recipe of concrete was calculated using three equation methods including three conditions: strength, tightness, and water demand. For concrete production, white Portland cement (42,5 R), basalt aggregate, water, and deflocculant based on polycarboxylate were used. To characterize the basic properties of studied concrete SEM and LM observations, chemical composition, and slump cone test was widely investigated. Thermal properties were also investigated using a thermal analyzer. Samples of concrete were characterized by compressive strength, bending tests, and "Brasil" tests after 28 days of the curing process. This study proved that all chosen modifications increased the final mechanical strength of researched concrete samples. Thermal conductivity was also increasing. |