人民长江
人民長江
인민장강
YANGTZE RIVER
2014年
13期
75-78,105
,共5页
二级界面%微观结构%钙硅比%特细砂混凝土
二級界麵%微觀結構%鈣硅比%特細砂混凝土
이급계면%미관결구%개규비%특세사혼응토
secondary interface%microscope%Ca/Si ratio%special fine sand concrete
为探究特细砂配制的混凝土出现裂缝且强度降低的原因，配制了不同水灰比的特细砂混凝土并加工成电镜试样。通过电镜扫描及能谱分析来研究其二级界面微观结构，并分析水灰比的变化对二级界面微观结构的影响。结果表明：相对而言，水灰比偏低的混凝土二级界面微观结构更加均匀致密；不同水灰比的特细砂混凝土二级界面C-S-H的凝胶钙硅比不同，但变化不大；较低的水灰比可以改善特细砂混凝土二级界的微观结构。
為探究特細砂配製的混凝土齣現裂縫且彊度降低的原因，配製瞭不同水灰比的特細砂混凝土併加工成電鏡試樣。通過電鏡掃描及能譜分析來研究其二級界麵微觀結構，併分析水灰比的變化對二級界麵微觀結構的影響。結果錶明：相對而言，水灰比偏低的混凝土二級界麵微觀結構更加均勻緻密；不同水灰比的特細砂混凝土二級界麵C-S-H的凝膠鈣硅比不同，但變化不大；較低的水灰比可以改善特細砂混凝土二級界的微觀結構。
위탐구특세사배제적혼응토출현렬봉차강도강저적원인，배제료불동수회비적특세사혼응토병가공성전경시양。통과전경소묘급능보분석래연구기이급계면미관결구，병분석수회비적변화대이급계면미관결구적영향。결과표명：상대이언，수회비편저적혼응토이급계면미관결구경가균균치밀；불동수회비적특세사혼응토이급계면C-S-H적응효개규비불동，단변화불대；교저적수회비가이개선특세사혼응토이급계적미관결구。
In order to research the reason of crack appearing and strength reduction of special fine sand concrete, several espe-cial fine sand concrete specimens with different water-cement ratios are prepared and processed into electron microscope sam-ples. According to scanning electron microscope and energy spectrum analysis, the influence of variation of water-cement ratio on secondary interface microstructure of concrete is analyzed. The research result shows that the secondary interface microstruc-ture of concrete with lower water-cement ratio is relatively more uniform and compact, moreover, the Ca/Si ratio of C-S-H gels in secondary interface is different in concrete with lower water-cement ratio, but change little.
