碱磷渣加气混凝土的微观形貌及水化产物

实验以碱激发磷渣活性的方式制备免蒸压加气混凝土,研究测试了加气混凝土的孔隙率并对孔隙进行了微观形貌分析,运用XRD,SEM,DSC-TG和FTIR等测试方法分析了碱激发免蒸压磷渣加气混凝土的水化产物.分析结果表明:表观密度500~800kg/m3的加气混凝土孔隙率在66.79%~77.06%之间,孔隙呈椭圆形,大小比较均匀,相互联通的孔隙较少,孔径大小在0.5~1.5mm之间.碱磷渣加气混凝土的水化产物主要有水化硅酸钙凝胶、白钙沸石和水化硅铝酸钙,部分水化产物碳化生成了CaCO3.

Micro-morphology and Hydration Products of Alkali-activated Phosphorus Slag Aerated Concrete

Non-autoclave aerated concrete was prepared with phosphorous slag with alkali-activator. The porosity and micro-morphology of the aerated concrete pore were analyzed, and XRD, SEM, DSC-TG and FTIR analysis were used to investigate the microstructures and hydration products of non-autoclave aerated concrete. The porosity of the non-autoclave aerated concrete with a bulk density of 500~800 kg/m3 is 66.79%~77.06%. The pore is elliptical and sealed, and the size of most pores is about 0.5~1.5 mm. The major hydration products of the aerated concrete are calcium silicate hydrate gel, gyrolite and hydrated calcium alumino-silicate. The CaCO3 was formed by carbonization of the hydration products.