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Related Concept Videos

Survey Safety01:28

Survey Safety

471
Surveying near highways, rough terrain, or power lines involves significant risks. Working along highways is particularly dangerous and requires the use of warning signs and flagmen. It is safest to avoid working directly on roads and use offsets whenever possible. When highway work is unavoidable, it must follow all safety guidelines. Surveyors should wear bright clothing, such as orange reflective vests, to ensure visibility to motorists, coworkers, and hunters. In construction zones, wearing...
471
Masonry in Cold and Hot Weather Conditions01:21

Masonry in Cold and Hot Weather Conditions

384
In cold weather, masonry construction requires specific precautions to ensure mortar does not freeze before curing, as this can significantly weaken its strength and watertightness. Mortar temperature should be maintained between 60°F and 80°F to support proper hydration and curing. Below 40°F, mortar water must be heated, but should not exceed 120°F as high temperatures can reduce mortar's compressive and bond strength.
Other key practices include keeping masonry units...
384
Design Example: Managing Concrete Workability01:14

Design Example: Managing Concrete Workability

356
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.
356
Hot Weather Concreting01:20

Hot Weather Concreting

367
Concreting at elevated temperatures accelerates the hydration process, leading to quicker setting but potentially reducing the long-term strength of the concrete structure. Additionally, low air humidity fosters rapid moisture loss from the concrete, resulting in reduced workability, pronounced plastic shrinkage, and a higher likelihood of crazing.
Mitigating the heat increase in concrete can be economically achieved by shading aggregate stockpiles to prevent heating from solar radiation,...
367

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Related Experiment Video

Updated: Apr 3, 2026

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Sun safety in construction: a U.K. intervention study.

J Houdmont1, P Madgwick2, R Randall3

  • 1Division of Psychiatry and Applied Psychology, School of Medicine, University of Nottingham, Nottingham NG8 1BB, UK, jonathan.houdmont@nottingham.ac.uk.

Occupational Medicine (Oxford, England)
|September 27, 2015
PubMed
Summary
This summary is machine-generated.

A UK construction sector educational intervention improved sun safety practices, including using shade and self-skin checks, though knowledge did not significantly increase. This highlights potential for targeted skin cancer prevention programs.

Keywords:
Constructioninterventionskin cancersolar radiationsun safetytranstheoretical model.

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Area of Science:

  • Occupational Health
  • Dermatology
  • Public Health Interventions

Background:

  • Construction workers face high skin cancer risk due to sun exposure.
  • Targeted interventions are needed to promote sun safety in this sector.

Purpose of the Study:

  • To assess changes in sun safety knowledge and practices among UK construction workers after an educational intervention.

Main Methods:

  • A baseline questionnaire was followed by a DVD-based, sector-specific intervention.
  • A 12-month follow-up questionnaire evaluated changes in knowledge and practices.

Main Results:

  • While sun safety knowledge did not significantly improve, 9 out of 10 reported behaviors showed positive change.
  • Key behavioral improvements included increased use of shade and regular skin self-checks for moles.

Conclusions:

  • The educational intervention positively influenced specific sun safety behaviors in construction workers.
  • Findings support developing tailored educational programs for skin cancer prevention in high-risk outdoor occupations.