Skip to main content

ORIGINAL RESEARCH article

Front. Built Environ.
Sec. Construction Materials
Volume 10 - 2024 | doi: 10.3389/fbuil.2024.1380103

Influence of Flocculation with Dry-Mixing on Slump Flow of High-Strength Concrete

Provisionally accepted
Yasuhiro Sakamoto Yasuhiro Sakamoto 1*Tomoko Fukuyama Tomoko Fukuyama 2Tomoya Kobayashi Tomoya Kobayashi 2Yuma Kawasaki Yuma Kawasaki 2*
  • 1 Nikko Co., Ltd., Hyogo, Japan
  • 2 立命館大学, 滋賀県, Japan

The final, formatted version of the article will be published soon.

    The use of high-strength concrete in construction is expected to increase, and the manufacturing technology employed to produce such concrete needs to adapt to this rise. High-strength concrete has a workability that can vary significantly depending on the mixing conditions, even with the same mix design and in the same environment. This research focuses on the change in workability due to drymixing (i.e., mixing of fine aggregate with cement in the early stage) in the mixing process of a highstrength concrete mix using a revolving-double paddle mixer. As a result, it was confirmed that the slump flow value difference caused by dry-mixing was about 25 cm. Furthermore, Cryo-SEM (which can observe the specimens in the frozen state) image analysis revealed that dry-mixing causes flocculation of cement particles. The amount of admixtures adsorbed was then analyzed. This study concluded that flocculation affects the degree and timing of admixture adsorption in the later stages of the mixing process, leading to differences in concrete workability.

    Keywords: High-strength concrete, Revolving-double paddle mixer, Dry-mixing, Flocculation, Cryo-SEM, Adsorption of admixtures

    Received: 01 Feb 2024; Accepted: 23 Sep 2024.

    Copyright: © 2024 Sakamoto, Fukuyama, Kobayashi and Kawasaki. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence:
    Yasuhiro Sakamoto, Nikko Co., Ltd., Hyogo, Japan
    Yuma Kawasaki, 立命館大学, 滋賀県, Japan

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.