Investigations of the processes of structure formation in concrete conditions on winter concreting

Abstract

Early as antifreeze additive for concreting construction company uses traditional additive sodium nitrite. While the concrete using the same stacking technology and warming gaining strength in the project deadlines. To determine the causes of degradation of concrete specialists VPO UGNTU studies were carried out samples of slabs structures by X-ray analysis and simultaneous thermal analysis (TG DSC). X-ray analysis was carried out on rentgenogram received diffractometer “D2 Phaser” (Bruker), treated with a licensed version of the program “Diffrac. Eva” using licensed databases “PDF- 2”. Simultaneous thermal analysis was carried out on material obtained by simultaneous thermal analysis instrument “STA 449 F3 Jupiter” and mass spectrometer “QMS 403 C Aeolos” (Netzsch). The results were processed using licensed programs “NetzschProteus. ProteusAnalysis” and “Aeolos. Dispsav”. Investigation of the processes of structure formation of concrete floor slabs in connection with their destruction due to changes in the composition and technology of concrete when designing the winter concreting on one of the construction sites in the city of Ufa. Methods of x-ray phase analysis and simultaneous thermal analysis effectively an examination of the structures of concrete and found out the reason of its destruction. Proven change in the composition of concrete in its design, due to the introduction of other supplements to replace the current. Research efforts showed that by X-ray analysis and simultaneous thermal analysis can be efficiently set up kinds of additives used in concrete, and use methods under consideration for the examination of concrete compositions. Concretes considered in relation to the use of potash has been proven and lignosulfonates in winter concreting.