Effect of Nano-CaCO3/Limestone Powder Composite on the Early Age Cement Hydration Products
Effect of Nano-CaCO3/Limestone Powder Composite on the Early Age Cement Hydration Products
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DOI：
10.4028/www.scientific.net/kem.703.354
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发表时间：
2016-08
期刊：
影响因子：
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通讯作者：
Huashan Yang;Y. Che;Man-Yu Zhang
中科院分区：
文献类型：
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作者：
Huashan Yang;Y. Che;Man-Yu Zhang
本研究考察了纳米ocaco3 /石灰石粉复合颗粒（NC/LS）的表面结构对水泥早期水化产物的影响。利用场发射扫描电镜（FE-SEM）观察了NC/LS的表面结构，并与原始石灰石粉末进行了比较。利用x射线衍射（XRD）研究了水化产物的类型，并计算了Ca (OH)2 （CH）的粒径和结晶取向度。此外，利用FE-SEM和原子力显微镜（AFM）观察水化产物的粒径、形状和分布。结果表明，纳米ocaco3颗粒分布在石灰石粉末的整个表面，因此可以成功地形成NC/LS。其次，NC/LS的表面结构影响水泥水化产物的粒径、形貌和分布，从而增强了早期硬化水泥浆体的微观结构。
In this study, the effect of surface structure of nanoCaCO3/limestone powder composite particles (NC/LS) on the hydration products of cement at early age is investigated. The surface structure of NC/LS is observed by field emission scanning electron microscope (FE-SEM) and compared with original limestone powders. X-ray diffraction (XRD) is used to investigate the types of hydration products and calculate the Ca (OH)2 (CH) particle size and crystal orientation degree. Additionally, FE-SEM and atomic force microscopy (AFM) are applied to observe the particle size, shape and distribution of hydration products. The results reveal that the nanoCaCO3 particles are distributed throughout the surface of limestone powders, and therefore successfully formed NC/LS. Secondly, the particle size, morphology and distribution of the cement hydration products are affected by the surface structure of NC/LS, so the microstructure of hardened cement paste at early age is enhanced.