| 摘要: |
| 研究分析了较大偏高岭土（MK）掺量下偏高岭土水泥（MK OPC）硬化浆体的强度、化学结合水量、MK反应量、Ca（OH）2含量、微观形貌和孔径分布.结果表明：在50%MK掺量（质量分数）范围内，随着MK掺量增加，MK OPC砂浆的强度增长速度加快；MK OPC砂浆长期强度基本高于纯水泥砂浆.随着MK掺量增加, MK OPC净浆的MK反应量增加、Ca（OH）2含量大幅减少、微观结构致密、孔结构细化.MK反应量和增强效应因子与d≤10nm孔体积增量均呈正比关系. |
| 关键词: 偏高岭土 强度 火山灰反应 孔径分布 |
| DOI：103969/jissn1007 9629201503007 |
| 分类号: |
| 基金项目:国家高技术研究发展计划（863计划）项目（2012AA062405） |
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| Properties and Microstructure of Metakaolin（MK）Cement Hardened Slurry with High Use Level of MK |
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QIAO Chunyu, NI Wen, WANG Changlong
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Key Laboratory of the Ministry of Education of China for HighEfficient Mining andSafety of Metal Mines, University of Science and Technology Beijing, Beijing 100083, China
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| Abstract: |
| The strength, non evaporable water content, metakaolin（MK） reaction amount, Ca（OH）2 content, microtopography and pore size distribution of metakaolin cement（MK OPC） hardened slurry with high use level（by mass） of MK were studied. The results indicate that mortar strength increasing rate accelerates as the use level of MK increases within 50% range and the strength of MK OPC mortar is mostly larger than that of plain cement mortar. For MK OPC pastes, as the use level of MK increases, MK reaction amount increases, Ca（OH）2 content decreases, microstructure becomes densification and pore structure refines. MK reaction amount or strengthening factor is in direct proportion to volume increment of pores with d≤10nm. |
| Key words: metakaolin（MK） strength pozzolanic reaction pore size distribution |
