Expansion behavior of portland cement mortars under sulfate attack
文献类型：会议论文
| 作者 | Chen JK ; Jiang MQ(蒋敏强); Yang DY
|
| 出版日期 | 2007 |
| 会议名称 | Asian Pacific Conference for Fracture and Strength (APCFS'06) |
| 会议日期 | November 22, 2006 - November 25, 2006 |
| 会议地点 | Sanya, Hainan Island, China |
| 关键词 | Ettringite Mortars Sodium sulfate attack |
| 中文摘要 | The expansion behaviors are studied on mortars at water-cement ratio (w/c)=0.4, 0.6, and 0.8, stored in sodium sulfate solutions with sulfate concentration of 0 ppm, 20,250 ppm, and 54,000 ppm, respectively. The mortars stored in control solution show no expansion, whereas the expansion of the ones exposed to sodium sulfate solutions occurs in two stages (i.e., "dormant" and "speedup" Stages). The high concentration of sulfate accelerates the expansion, but control of water-cement ratio (0.60 in this case) can put up higher resistance to sulfate attack. The XRD analysis shown that the macro-expansion depends on the formation and growth of both ettringite and gypsum. The analysis obtained by means of Sigmoidal Fit Method indicates that the microdamage evolution depends strongly on the average size of microvoids in the material. |
| 收录类别 | CPCI-S ; EI |
| 会议录 | Key Engineering Materials
 |
| 语种 | 英语 |
| WOS记录号 | WOS:000252246301267 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/60299]  |
| 专题 | 力学研究所_力学所知识产出(1956-2008) |
| 推荐引用方式 GB/T 7714 | Chen JK,Jiang MQ,Yang DY. Expansion behavior of portland cement mortars under sulfate attack[C]. 见:Asian Pacific Conference for Fracture and Strength (APCFS'06). Sanya, Hainan Island, China. November 22, 2006 - November 25, 2006. |
入库方式： OAI收割
来源：力学研究所
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