Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Flow Table Test01:12

Flow Table Test

The flow table test is an established method used to assess the workability of concrete, particularly useful for evaluating highly flowable concrete mixes. This test employs an apparatus that consists of a wooden board topped with a steel plate, collectively weighing 35 pounds. The board is connected to a base via a hinge and measures 27.6 inches on each side.
Concrete is placed within a truncated cone mold that is 8 inches high with an 8-inch base diameter and a 5-inch top diameter. The...
Placing Concrete01:17

Placing Concrete

The concrete is placed as close as possible to its final position to avoid segregation. The placed concrete is then fully compacted to expel the entrapped air, and the next layer of concrete is laid while the underlying layer is still in the plastic state. The rate at which concrete is placed and compacted is kept equal.
While placing concrete, care is taken to ensure that the concrete is laid in uniform layers, and hand shoveling and moving concrete using poker vibrators is avoided. Also,...
Finishing Concrete01:18

Finishing Concrete

Concrete finishing starts immediately after the concrete has been placed and consolidated. The initial step, screeding, involves leveling the concrete surface by removing excess material to flush it with the formwork's top. Following this, bull float or darby are employed to smooth the surface further, effectively lower high spots, fill low areas, and ensure larger aggregate particles are embedded within the concrete. This preparation is critical before the appearance of bleed water, as its...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Complex three-dimensional self-assembly in proxies for atmospheric aerosols.

Nature communications·2017
Same author

3D semiconducting nanostructures via inverse lipid cubic phases.

Scientific reports·2017
Same author

Watching mesoporous metal films grow during templated electrodeposition with in situ SAXS.

Nanoscale·2017
Same author

Aligned platinum nanowire networks from surface-oriented lipid cubic phase templates.

Nanoscale·2016
Same author

Glycerol prevents dehydration in lipid cubic phases.

Chemical communications (Cambridge, England)·2015
Same author

NASA's Bureaucracy.

Science (New York, N.Y.)·1986

Related Experiment Video

Updated: Jun 25, 2026

A Microfluidic Device with Groove Patterns for Studying Cellular Behavior
13:50

A Microfluidic Device with Groove Patterns for Studying Cellular Behavior

Published on: August 30, 2007

Fluid beds: at last, challenging two entrenched practices.

A M Squires, M Kwauk, A A Avidan

    Science (New York, N.Y.)
    |December 20, 1985
    PubMed
    Summary
    This summary is machine-generated.

    Fluidization technology, developed for coarse solids and fine powders, now challenges conventional boilers and catalytic reactors. Advances in bubble-free fluidization and understanding fine particle behavior are key to improved combustion and catalysis.

    More Related Videos

    Wicking Tests for Unidirectional Fabrics: Measurements of Capillary Parameters to Evaluate Capillary Pressure in Liquid Composite Molding Processes
    07:06

    Wicking Tests for Unidirectional Fabrics: Measurements of Capillary Parameters to Evaluate Capillary Pressure in Liquid Composite Molding Processes

    Published on: January 27, 2017

    Rendering SiO2/Si Surfaces Omniphobic by Carving Gas-Entrapping Microtextures Comprising Reentrant and Doubly Reentrant Cavities or Pillars
    08:02

    Rendering SiO2/Si Surfaces Omniphobic by Carving Gas-Entrapping Microtextures Comprising Reentrant and Doubly Reentrant Cavities or Pillars

    Published on: February 11, 2020

    Related Experiment Videos

    Last Updated: Jun 25, 2026

    A Microfluidic Device with Groove Patterns for Studying Cellular Behavior
    13:50

    A Microfluidic Device with Groove Patterns for Studying Cellular Behavior

    Published on: August 30, 2007

    Wicking Tests for Unidirectional Fabrics: Measurements of Capillary Parameters to Evaluate Capillary Pressure in Liquid Composite Molding Processes
    07:06

    Wicking Tests for Unidirectional Fabrics: Measurements of Capillary Parameters to Evaluate Capillary Pressure in Liquid Composite Molding Processes

    Published on: January 27, 2017

    Rendering SiO2/Si Surfaces Omniphobic by Carving Gas-Entrapping Microtextures Comprising Reentrant and Doubly Reentrant Cavities or Pillars
    08:02

    Rendering SiO2/Si Surfaces Omniphobic by Carving Gas-Entrapping Microtextures Comprising Reentrant and Doubly Reentrant Cavities or Pillars

    Published on: February 11, 2020

    Area of Science:

    • Chemical Engineering
    • Combustion Science
    • Particle Technology

    Background:

    • Two distinct fluidization techniques emerged in the early 20th century: one for coarse solids and another for fine powders.
    • Historically, fluidization research emphasized bubbling beds for coarse solids, like coal combustion.
    • Fine powder fluidization processes prioritize bubble suppression for efficiency.

    Purpose of the Study:

    • To highlight the evolving landscape of fluidization technology.
    • To underscore the growing competitiveness of fluid bed reactors against conventional systems.
    • To identify critical research areas for advancing fluidization in catalysis and combustion.

    Main Methods:

    • Review of historical development in fluidization arts for coarse solids and fine powders.
    • Analysis of design considerations for coal combustion fluid beds, including freeboard char combustion.
    • Examination of bubble suppression strategies in fine powder fluidization.
    • Assessment of fluid bed competitiveness with pulverized-coal boilers and fixed-bed catalytic reactors.
    • Identification of research needs for fluid bed catalysis, particularly concerning fine particles (<40 micrometers).

    Main Results:

    • Fluidized combustion beds are increasingly challenging conventional pulverized-coal boilers.
    • Fluidized beds offer superior control over emissions, especially for high-sulfur fuels.
    • Progress in bubble-suppressed (bubbleless) fluidization enhances competitiveness with fixed-bed catalytic reactors.

    Conclusions:

    • Fluidization technology has matured into two distinct, yet increasingly competitive, applications.
    • Optimizing fluid bed reactors for catalysis requires further investigation into fine particle behavior (below 40 micrometers) and higher gas velocities.
    • Fluidized beds represent a significant advancement in emissions control for coal combustion and efficiency in catalytic processes.