Impact of the Geometrical Parameters of Dolomite Coarse Aggregate on the Thermal and Mechanic Properties of Preplaced Aggregate Concrete

Materials

KrzysztofAdam Ostrowski¹  Tomasz Gawenda²  Daniel Saramak²  Agnieszka Surowiak²  Agata Stempkowska²  Zdzisław Naziemiec³ 

[1] Faculty of Civil Engineering, Cracow University of Technology, 24 Warszawska Str., 31-155 Cracow, Poland;Faculty of Mining and Geoengineering, AGH University of Science and Technology, Mickiewicza 30 Av., 30-094 Krakow, Poland;Glass and Building Materials Department, Institute of Ceramics and Building Materials, Research Network Łukasiewicz, 31-983 Krakow, Poland;

关键词: concrete;    regular and irregular aggregates;    thermal and mechanical properties;    CT analysis;    porosity;   

DOI  :  10.3390/ma13194358

来源: DOAJ

【 摘 要 】

The article shows investigations on the behavior of preplaced aggregate concrete with regular and irregular coarse aggregates. The thermal properties, compressive strength, and internal structure were analyzed based on computed tomography images. The regular and irregular shapes of aggregates were obtained according to patented technology, which is possible to produce in both laboratory and industrial conditions. Based on the conducted calculations, heat storage capacity was assessed. The influence of grain shape on the material strength, porosity, and hydration gaps was determined. Debonded porosity, as a result of aggregate impurities, was shown using computer tomography analysis. It was shown that the arrangement and shape of the grains has a significant impact on the performance properties of hardened preplaced concrete.

【 授权许可】

Unknown