通过对湿密度分别为500 kg／m3、800 kg／m3、1000 kg／m3的轻质复合发泡泡沫混凝土试样进行了室内无侧限单轴压缩试验，分析了氯化钙和硫酸钠两种早强剂对轻质复合发泡泡沫混凝土早期抗压强度的影响；借助光学显微技术并通过图像分析软件，从微观角度解释了氯化钙、硫酸钠早强剂对轻质复合发泡泡沫混凝土早期抗压强度形成的影响。结果表明：两种早强剂均可使轻质复合发泡泡沫混凝土早期抗压强度有较大幅度提高，特别是3d、7 d、14 d抗压强度提高幅度分别至少在44．3％、25．4％和11．2％，但对28 d抗压强度提高不明显；两种早强剂均可使轻质复合发泡泡沫混凝土的微观结构指标显著提高，硫酸钠早强剂提高效果更为明显。
Unconfined uniaxial compression test was performed on composite foamed lightweight concrete specimen with wet density of 500 kg/m3 , 800 kg/m3 and 1000 kg/m3 to analyze the effects of two kinds of early strength agent , calcium chloride and sodium sulfate , on the early compressive strength of lightweight composite foamed concrete .Otherwise the Optical microscopy technology and image analysis technology were applied to discuss the effects of calcium chloride and sodium sulfate on the early compressive strength from the micro perspective .The results illustrate that both types of early strength agents affect the early compressive strength obviously .Especially the 3 d, 7 d, 14 d compressive strength increase by at least 44.3%, 25.4% and 11.2%, and the sodium sulfate performs better .The incorporation of early strength agents could make its micro pore structure index improved significantly from the micro perspective ,especially the sodium sulfate .
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