Calcined nanosized tubular halloysite for the preparation of limestone calcined clay cement (LC3)
文献类型：期刊论文
| 作者 | Yu, Ting2,3; Zhang, Baifa4; Guo, Haozhe1; Wang, Qiang2,3; Liu, Dong2,3 ; Chen, Jiarong2,3; Yuan, Peng2,4
|
| 刊名 | APPLIED CLAY SCIENCE
 |
| 出版日期 | 2023-02-01 |
| 卷号 | 232页码:11 |
| 关键词 | Halloysite Limestone Limestone calcined clay cement (LC 3 ) Microstructure Supplementary cementitious materials (SCMs) |
| ISSN号 | 0169-1317 |
| DOI | 10.1016/j.clay.2022.106795 |
| 英文摘要 | Halloysite is a kind of 1:1 clay mineral having a special nanosized tubular morphology and pore structure. In this work, nanosized tubular halloysite calcined at 750 degrees C (Hal750) and limestone (LS) were used to partially replace the ordinary Portland cement (OPC) for the preparation of limestone calcined clay cement (LC3). The mechanical properties and microstructure of LC3 were studied. The results revealed that the obtained LC3 had higher early compressive strengths on 3 and 7 days than did plain OPC. LC3 with a replacement ratio of 22.5% (containing 15.0% Hal750 and 7.5% LS) resulted in maximum compressive strength of 46.38 MPa, being 9.4% higher than OPC's after 28 days of curing. Further, LC3 featured a compact microstructure and smaller critical pore size than OPC, which is mainly because more additional C-(A)-S-H, hemicarboaluminate (Hc), and monocarboaluminate (Mc) were formed in LC3 system, thus contributing to the matrix densification and strength development. However, when the replacement ratio exceeded 37.5%, the insufficient portlandite (CH) limited the pozzolanic reaction with Hal750, leaving excess Hal750 in the LC3 that led to their inhomogeneous microstructure, and thus weakened the mechanical properties. These results show that halloysite is a promising material for the prepa-ration of LC3 whose properties are sensitive to the replacement ratio used. |
| WOS研究方向 | Chemistry ; Materials Science ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000916428300001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/72549]  |
| 专题 | 中国科学院矿物学与成矿学重点实验室 |
| 通讯作者 | Yuan, Peng |
| 作者单位 | 1.Guangdong Acad Sci, Inst Resources Utilizat & Rear Earth Dev, Guangzhou 510650, Peoples R China 2.Chinese Acad Sci, Inst Earth Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny,Guangdong Prov K, Guangzhou 510640, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Guangdong Univ Technol, Sch Environm Sci & Engn, Guangzhou 510006, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Ting,Zhang, Baifa,Guo, Haozhe,et al. Calcined nanosized tubular halloysite for the preparation of limestone calcined clay cement (LC3)[J]. APPLIED CLAY SCIENCE,2023,232:11. |
| APA | Yu, Ting.,Zhang, Baifa.,Guo, Haozhe.,Wang, Qiang.,Liu, Dong.,...&Yuan, Peng.(2023).Calcined nanosized tubular halloysite for the preparation of limestone calcined clay cement (LC3).APPLIED CLAY SCIENCE,232,11. |
| MLA | Yu, Ting,et al."Calcined nanosized tubular halloysite for the preparation of limestone calcined clay cement (LC3)".APPLIED CLAY SCIENCE 232(2023):11. |
入库方式： OAI收割
来源：广州地球化学研究所
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