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利用纳米压痕技术研究水泥-矿渣复合胶凝材料硬化浆体C–S–H凝胶的特性,并结合SEM附带的EDS分析C–S–H凝胶的元素构成.纳米压痕测试结果显示,随着龄期的延长,各试样中LDC–S–H凝胶的体积含量逐渐减少,HDC–S–H凝胶的体积含量逐渐增加,说明水化后期,生成的C–S–H凝胶以HDC–S–H凝胶为主;随着矿渣的掺入和掺量的增大,试样中HDC–S–H凝胶体积含量越大,表明矿渣生成的凝胶主要为HDC–S–H凝胶.EDS能谱分析表明,两种C–S–H凝胶的化学组成相似,与其Ca/Si比无关.
The nano-indentation technique was used to study the properties of C-S-H gel, and the elemental composition of C-S-H gel was analyzed by EDS combined with SEM.The results of nanoindentation test , The volume fraction of LDC-S-H gel in each sample gradually decreased and the volume fraction of HDC-S-H gel gradually increased with the increase of age, indicating that the C-S-H The HDC-S-H gel was the main gel. With the increase of slag incorporation and content, the HDC-S-H gel volume content in the sample was larger, indicating that the gel generated by the slag was mainly HDC -S-H gel. EDS EDS showed that the chemical compositions of the two C-S-H gels were similar regardless of the Ca / Si ratio.