某石灰窑耐热混凝土胀裂机理研究分析

针对某钢铁公司石灰窑平台混凝土胀裂现象,通过对混凝土试样进行化学分析、XRD射线衍射试验分析及扫描电子显微镜微观试验分析,并对平台结构承载能力进行验算,认为造成混凝土胀裂的主要原因为混凝土骨料中MgO含量过高,在高温条件下发生水化反应,体积膨胀而造成混凝土开裂,当混凝土开裂后造成结构承载能力不足及混凝土碳化收缩加速了混凝土的开裂.研究分析成果对相关工程的研究具有一定的参考价值.

Research and analysis on spalling mechanism of concrete heat resistance in a limekiln

Aimed at the concrete spalling phenomenon on the limekiln of a steel company,through the chemical analysis of the concrete sample,the experimental analysis of the XRD radial diffraction and the microcosmic experimental analysis by the scanning electron microscope(SEM)are expounded,checking computations to the carrying capacity of the platform structure.The major cause for the concrete spalling is the high content of MgO in the concrete mineral materials,occurring the hydration reaction in the high temperatu...