{"title":"Unlocking Nano-CSH and Silica Fume to Enhance the Performance of Alkali-Free Liquid Accelerators in Low-Temperature Environments","authors":"Yongdong Xu*, and , Renhe Yang, ","doi":"10.1021/acs.langmuir.5c01997","DOIUrl":null,"url":null,"abstract":"<p >This article is based on the research background of an early performance of shotcrete under low-temperature environments. Silica fume (SF) (silicon powder) and nano-CSH are used to improve the effect of the low-temperature environment on the performance of alkali-free (AF) liquid accelerators and early strength of shotcrete. The results show that the 10% SF and 3% nano-CSH composite admixture significantly enhances AF accelerators’ performance at 5 °C, reducing initial and final setting times to 3.0 and 10 min, respectively, while substantially improving the early age compressive strength of shotcrete. Furthermore, hydration calorimetry, phase analysis, and microstructural characterization reveal that nano-CSH synergistically enhances silica fume nucleation efficiency.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"41 37","pages":"25167–25175"},"PeriodicalIF":3.9000,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Langmuir","FirstCategoryId":"92","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acs.langmuir.5c01997","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
This article is based on the research background of an early performance of shotcrete under low-temperature environments. Silica fume (SF) (silicon powder) and nano-CSH are used to improve the effect of the low-temperature environment on the performance of alkali-free (AF) liquid accelerators and early strength of shotcrete. The results show that the 10% SF and 3% nano-CSH composite admixture significantly enhances AF accelerators’ performance at 5 °C, reducing initial and final setting times to 3.0 and 10 min, respectively, while substantially improving the early age compressive strength of shotcrete. Furthermore, hydration calorimetry, phase analysis, and microstructural characterization reveal that nano-CSH synergistically enhances silica fume nucleation efficiency.
期刊介绍：
Langmuir is an interdisciplinary journal publishing articles in the following subject categories:
Colloids: surfactants and self-assembly, dispersions, emulsions, foams
Interfaces: adsorption, reactions, films, forces
Biological Interfaces: biocolloids, biomolecular and biomimetic materials
Materials: nano- and mesostructured materials, polymers, gels, liquid crystals
Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry
Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals
However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do?
Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*.
This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).
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