| 掺MgO超细水泥的膨胀性能及其水化程度 |
| |
| 引用本文： | 石帅,邓敏,莫立武.掺MgO超细水泥的膨胀性能及其水化程度[J].南京工业大学学报(自然科学版),2012,34(2):73-77. |
| |
| 作者姓名： | 石帅 邓敏 莫立武 |
| |
| 作者单位： | 南京工业大学材料科学与工程学院,材料化学工程国家重点实验室,江苏南京210009 |
| |
| 摘 要： | 在超细水泥中掺不同活性的MgO膨胀剂(MEA),研究MEA对超细水泥浆体和掺加超细粉煤灰水泥浆体膨胀性能的影响规律,并采用差热-热重同步热分析仪对MgO的水化程度进行表征.结果表明:MEA能很好地补偿超细水泥浆体的收缩,可作为补偿超细水泥收缩的新型膨胀剂；高活性MEA早期水化程度较大,掺高活性MEA水泥浆体的早期膨胀较大,后期膨胀增长趋势较小；低活性MEA早期水化程度低于高活性MEA,掺低活性MEA水泥浆体的早期膨胀较小,但后期膨胀趋势较大；MEA的掺量越大,水泥浆体的膨胀率越大；掺加超细粉煤灰抑制了掺加MEA水泥浆体的膨胀,但没有明显降低MgO的水化程度.
|
| 关 键 词： | 超细水泥 MgO膨胀剂 膨胀性能 水化程度 |
Expansion property of super-fine cement paste added MgO expansive agent and hydration degree of MgO |
| |
| SHI Shuai
,
DENG Min
,
MO Liwu.Expansion property of super-fine cement paste added MgO expansive agent and hydration degree of MgO[J].Journal of Nanjing University of Technology,2012,34(2):73-77. |
| |
| Authors: | SHI Shuai DENG Min MO Liwu |
| |
| Institution: | (State Key Laboratory of Materials-Oriented Chemical Engineering,College of Materials Science and Engineering,Nanjing University of Technology,Nanjing 210009,China) |
| |
| Abstract: | The effects of MgO-bearing expansive agent(MEA) with different activities on expansion property of super-fine cement grouts were investigated.The hydration degree of MgO-bearing expansive agent was analyzed by thermogravimetric-differential thermogravimetric analyzer.Results showed that MEA could compensate the shrink of super-fine cement paste in hard stage commendably.MEA with higher activity caused a larger early expansion and a smaller final expansion,while MEA with lower activity caused a smaller early expansion and a larger final expansion.With the admixture amounts of MEA increasing,the expansion of cement pastes increased.Replacing super-fine cement with super-fine fly ash would restrain the expansion of cement pastes containing MEA. |
| |
| Keywords: | super-fine cement MEA expansion property hydration degree |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
