摘要
研究了矿物掺合料对混凝土抗杂散电流性能的影响。结果发现:粉煤灰和矿渣微粉均可以改善混凝土的抗杂散电流性能,并且随着掺量的增加,改善效果逐渐增强。粉煤灰和矿渣微粉复掺后,改善混凝土抗杂散电流的效果最为显著,尤其是复掺总量为20%时,混凝土杂散电流腐蚀开裂时间比基准混凝土延长了28.67%。通过对各配合比混凝土试样进行Sirion场发射扫描电镜实验观察混凝土表面形貌特征发现,粉煤灰与矿渣微粉的复掺使得胶凝材料水化完全,混凝土表面较为致密,大大提高了混凝土的抗杂散电流性能。
The effect of the mineral admixtures on the stray current resistance of concrete is studied.The results show that： adding fly ash or slag powder to the concrete could improve the stray current resistance of concrete,and with the content increasing,the improving effect enhances straightly.Double-mixture fly ash and slag could effectively improve the stray current resistance of concrete,especially when the optimal dosage is 20%,the cracking time of stray current corrosion for concrete can prolong 28.67% compared with the normal concrete.Through observing the surface shape characteristic of concrete by the Sirion scanning electronic microscope,double-mixture fly ash and slag could make the hydration of the cementitious material being complete,which can enhance the stray current resistance of concrete greatly.
出处
《混凝土与水泥制品》
北大核心
2011年第7期13-16,共4页
China Concrete and Cement Products
基金
沪杭客运专线特大桥主梁混凝土收缩徐变控制与耐久性提升技术研究
