Intrinsic mechanical properties and seeding effect of tobermorite synthesized in supercritical water

IF 4.4 3区工程技术 Q2 CHEMISTRY, PHYSICAL

Journal of Supercritical Fluids Pub Date : 2025-06-30 DOI:10.1016/j.supflu.2025.106710

Valentina Musumeci , Jiaqi Li , Ebtisam Saeed , Paula Sanz Camacho , Ke Xu , Paulo J.M. Monteiro , Jorge S. Dolado , Cyril Aymonier

{"title":"Intrinsic mechanical properties and seeding effect of tobermorite synthesized in supercritical water","authors":"Valentina Musumeci , Jiaqi Li , Ebtisam Saeed , Paula Sanz Camacho , Ke Xu , Paulo J.M. Monteiro , Jorge S. Dolado , Cyril Aymonier","doi":"10.1016/j.supflu.2025.106710","DOIUrl":null,"url":null,"abstract":"<div><div>This publication reports for the first time the physiochemical, the intrinsic mechanical properties and the seed effect of anomalous Al-substituted 11 Å tobermorite synthesized via the innovative supercritical hydrothermal flow process at 400 °C and 25 MPa. This approach allows synthesizing highly crystalline tobermorite fibers in only 8 s, with characteristics very close to the natural tobermorite. The anomalous 11 Å tobermorite exhibits aluminosilicate chains with a high polymerisation degree and a less defective structure compared to materials produced via the conventional hydrothermal method. Furthermore, the intrinsic mechanical properties of Al-tobermorite synthesized in supercritical water are investigated for the first time by High-Pressure XRD. This Al-substituted 11 Å tobermorite is characterised by higher incompressibility along the <strong>b</strong>-axis and bulk modulus K<sub>0</sub> in comparison with what is commonly observed for other synthetic tobermorite. The tobermorite acts as nucleation points to trigger the quick formation of the hydration product in Portland cement paste.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"225 ","pages":"Article 106710"},"PeriodicalIF":4.4000,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Supercritical Fluids","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0896844625001974","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

This publication reports for the first time the physiochemical, the intrinsic mechanical properties and the seed effect of anomalous Al-substituted 11 Å tobermorite synthesized via the innovative supercritical hydrothermal flow process at 400 °C and 25 MPa. This approach allows synthesizing highly crystalline tobermorite fibers in only 8 s, with characteristics very close to the natural tobermorite. The anomalous 11 Å tobermorite exhibits aluminosilicate chains with a high polymerisation degree and a less defective structure compared to materials produced via the conventional hydrothermal method. Furthermore, the intrinsic mechanical properties of Al-tobermorite synthesized in supercritical water are investigated for the first time by High-Pressure XRD. This Al-substituted 11 Å tobermorite is characterised by higher incompressibility along the b-axis and bulk modulus K₀ in comparison with what is commonly observed for other synthetic tobermorite. The tobermorite acts as nucleation points to trigger the quick formation of the hydration product in Portland cement paste.

查看原文本刊更多论文

超临界水中合成托贝莫来石的内在力学性能及播种效果

本文首次报道了在400℃、25MPa条件下采用创新超临界热液工艺合成的异常al取代11Å托贝莫来石的理化性质、内在力学性能和种子效应。这种方法可以在8s内合成高度结晶的托勃莫里石纤维，其特性非常接近天然托勃莫里石。与传统水热法制得的材料相比，异常11Å托贝莫来石具有高聚合度和较少缺陷结构的铝硅酸盐链。此外，首次利用高压XRD对超临界水中合成的铝托贝莫来石的内在力学性能进行了研究。这种al取代11Å托伯莫里石的特点是沿b轴的不可压缩性和体积模量K0比通常观察到的其他合成托伯莫里石更高。在硅酸盐水泥膏体中，托贝莫来石作为成核点触发水化产物的快速形成。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Supercritical Fluids 工程技术-工程：化工

CiteScore

7.60

自引率

10.30%

发文量

236

审稿时长

56 days

期刊介绍： The Journal of Supercritical Fluids is an international journal devoted to the fundamental and applied aspects of supercritical fluids and processes. Its aim is to provide a focused platform for academic and industrial researchers to report their findings and to have ready access to the advances in this rapidly growing field. Its coverage is multidisciplinary and includes both basic and applied topics. Thermodynamics and phase equilibria, reaction kinetics and rate processes, thermal and transport properties, and all topics related to processing such as separations (extraction, fractionation, purification, chromatography) nucleation and impregnation are within the scope. Accounts of specific engineering applications such as those encountered in food, fuel, natural products, minerals, pharmaceuticals and polymer industries are included. Topics related to high pressure equipment design, analytical techniques, sensors, and process control methodologies are also within the scope of the journal.