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

Design Example: Managing Concrete Workability01:14

Design Example: Managing Concrete Workability

69
This example deals with managing the workability of concrete for a raft foundation project under hot weather conditions. Workability is crucial for ensuring the concrete is easy to place, compact, and finish. In this scenario, a slump test — a common method to measure the workability of fresh concrete — initially indicated low workability. This was attributed to the rapid water loss from the concrete mix, exacerbated by the high temperatures causing the course aggregates to heat up.
69
Design Example: Alignment of a Road Line Using GIS01:17

Design Example: Alignment of a Road Line Using GIS

38
The alignment of a road line using Geographic Information Systems (GIS) is a critical process in civil engineering, combining advanced technology with practical decision-making. This methodology begins with the collection of geospatial data, including information on land cover, geomorphology, drainage patterns, slope, and contour details. Such data is typically acquired through satellite imagery and GIS tools, offering a comprehensive understanding of the terrain.Once the data is gathered, it...
38
Deleterious Substances in Aggregate01:25

Deleterious Substances in Aggregate

141
Deleterious substances in aggregates can be detrimental to the quality and durability of concrete. These substances include organic impurities like loam, which interfere with cement hydration and are usually present in the sand. These prevent a good bond between aggregate and cement paste. Organic impurities can be detected using the colorimetric test, where the darkness of a solution after agitation indicates the level of organic content.
Another type of impurity is clay and fine material that...
141
Retarders01:19

Retarders

61
Retarders are chemical admixtures designed to extend the setting time, which is especially useful when there is a delay in sequential concrete pours to prevent cold joints and to achieve a cohesive structure. Retarders, when used in appropriate amounts, can also enhance the architectural appearance of exposed aggregate finishes.
The function of retarders is to delay the setting of concrete, and this effect can be measured using a penetration test. The retardation process involves adding...
61
Preplaced Aggregate Concrete01:29

Preplaced Aggregate Concrete

91
Preplaced aggregate concrete is ideal for construction environments that are not easily accessible. The process begins by properly wetting the gap-graded coarse aggregates to remove the dirt, then placing it in the form and compacting it. Voids are filled with a mortar mix pumped under pressure through slotted pipes. This mortar typically consists of Portland cement, pozzolan, fine aggregates, water, and a fluidizing aid. The pozzolan helps reduce bleeding and segregation while improving the...
91
Placing Concrete01:17

Placing Concrete

72
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,...
72

You might also read

Related Articles

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

Sort by
Same author

Echoes from northern Iberia: distribution, ecology, genetics, and identification of Asturian cicadas (Hemiptera: Cicadidae).

Journal of insect science (Online)·2026
Same author

Exotic continental gastropods and emerging helminth Parasites: Insights from the Iberian Peninsula.

Journal of invertebrate pathology·2026
Same author

The hidden passengers: On the role of exotic crayfish in the spread of symbiotic and pathogenic organisms in Northern Iberian Peninsula.

Journal of invertebrate pathology·2026
Same author

Identification of Dynamic Parameters in a DC Motor Using Step and Ramp Torque Response Methods.

Sensors (Basel, Switzerland)·2026
Same author

What Are We Protecting? On the Silent Arrival of <i>Anodonta cygnea</i> to Spain.

Ecology and evolution·2025
Same author

Slow Invaders Going Fast: New Data of Exotic Slugs (Gastropoda: Eupulmonata) From Spain.

Ecology and evolution·2025
Same journal

Novel Parent Survey Measures Sensory Behaviors Incorporating Sensory Modality and Stimulus Intensity.

Heliyon·2026
Same journal

Expression of concern: "SQSTM1/p62 promotes the progression of gastric cancer through epithelial-mesenchymal transition" [Heliyon 10 (2024) e24409].

Heliyon·2026
Same journal

Expression of concern: "TL1A promotes metastasis and EMT process of colorectal cancer" [Heliyon 10 (2024) e24392].

Heliyon·2026
Same journal

Expression of concern: "Factors affecting timing of surgery following neoadjuvant chemoradiation for esophageal cancer" [Heliyon 9 (2023) e23212].

Heliyon·2026
Same journal

Expression of concern: "On stratified single-valued soft topogenous structures" [Heliyon 10 (2024) e27926].

Heliyon·2026
Same journal

Expression of concern: "Artifact removal and motor imagery classification in EEG using advanced algorithms and modified DNN" [Heliyon 10 (2024) e27198].

Heliyon·2026
See all related articles

Related Experiment Video

Updated: May 29, 2025

Design and Construction of an Urban Runoff Research Facility
13:48

Design and Construction of an Urban Runoff Research Facility

Published on: August 8, 2014

13.0K

Deficiencies causes in road construction scheduling: Perspectives from construction professionals.

Karen Castañeda1,2,3, Omar Sánchez1, Rodrigo F Herrera2

  • 1Department of Civil Engineering, Pontificia Universidad Javeriana, Bogotá D.C. 111711, Colombia.

Heliyon
|February 3, 2025
PubMed
Summary
This summary is machine-generated.

Effective road construction scheduling requires understanding common deficiencies. Key causes include poor labor estimation and coordination issues, impacting project timelines and budgets.

Keywords:
Construction planningHighwayRoad projectsSchedulingScheduling deficiencies

More Related Videos

Evaluating the Effect of Roadside Parking on a Dual-Direction Urban Street
14:55

Evaluating the Effect of Roadside Parking on a Dual-Direction Urban Street

Published on: January 20, 2023

3.2K
Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation
11:41

Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation

Published on: February 1, 2020

20.3K

Related Experiment Videos

Last Updated: May 29, 2025

Design and Construction of an Urban Runoff Research Facility
13:48

Design and Construction of an Urban Runoff Research Facility

Published on: August 8, 2014

13.0K
Evaluating the Effect of Roadside Parking on a Dual-Direction Urban Street
14:55

Evaluating the Effect of Roadside Parking on a Dual-Direction Urban Street

Published on: January 20, 2023

3.2K
Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation
11:41

Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation

Published on: February 1, 2020

20.3K

Area of Science:

  • Civil Engineering
  • Construction Management
  • Project Management

Background:

  • Effective construction scheduling is vital for road project success.
  • Scheduling deficiencies lead to delays, cost overruns, and litigation.
  • Limited research exists on the specific causes of scheduling deficiencies in road projects.

Purpose of the Study:

  • To identify and analyze the causes affecting construction scheduling in road projects.
  • To address the research gap concerning the detailed examination of scheduling deficiency causes.
  • To provide actionable insights for project managers to mitigate scheduling issues.

Main Methods:

  • A four-stage research methodology was employed.
  • Stage 1: Identification of causes affecting construction scheduling.
  • Stages 2-4: Questionnaire design and application, influence analysis, and exploratory quantitative analysis involving 32 experts.

Main Results:

  • 34 causes of scheduling deficiencies were identified across six categories: workforce, machinery, material, measurement, environment, and method.
  • The most impactful causes identified were poor estimation of labor performance, poor estimation of workforce quantity, and deficient coordination with public utilities.
  • A relative influence index was used to evaluate the frequency and severity of each cause.

Conclusions:

  • The study successfully identified critical factors contributing to road construction scheduling deficiencies.
  • Findings enable project managers to pinpoint root causes of planning problems.
  • Effective solutions can be developed by addressing the identified high-impact causes, improving project outcomes.