Abstract
Cementitious grouts injected by vacuum pressure techniques are expected to loose part of the free mixing water with direct consequences on fluidity and penetrability. A new set-up was developed to enable simultaneous assessment of water extracted due to vacuuming and real-time viscosity changes occurring over several minutes of time. A slotted four-bladed vane was used to prevent migration of cement particles away from the center and enable the vane to remain in contact with new material during motion. Test results have shown that the extraction of water decreases fluidity (i.e., flow time) and increases viscosity, mostly due to increased internal friction within the solid particles. Grouts prepared with low water-to-cement ratio and containing moderate to high concentrations of viscosity-modifying admixtures yielded adequate water retentivity with minor variations in viscosity. “Injectability boxes” are proposed to simplify product development and predict variations in grout viscosity during vacuuming.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
