白云石粗集料几何参数对预填集料混凝土热性能和力学性能的影响

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

作者信息

Stempkowska Agata, Gawenda Tomasz, Naziemiec Zdzisław, Adam Ostrowski Krzysztof, Saramak Daniel, Surowiak Agnieszka

机构信息

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.

出版信息

Materials (Basel). 2020 Sep 30;13(19):4358. doi: 10.3390/ma13194358.

DOI:10.3390/ma13194358

PMID:33008009

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7579339/

Abstract

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.

摘要

本文展示了对含规则和不规则粗集料的预填集料混凝土性能的研究。基于计算机断层扫描图像分析了其热性能、抗压强度和内部结构。集料的规则和不规则形状是根据专利技术获得的，该技术在实验室和工业条件下均有可能实现。基于所进行的计算，评估了蓄热能力。确定了颗粒形状对材料强度、孔隙率和水化间隙的影响。通过计算机断层扫描分析显示了由于集料杂质导致的脱粘孔隙率。结果表明，颗粒的排列和形状对硬化预填混凝土的性能有显著影响。