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Related Concept Videos

Design Example: Sustainability in Concrete Building01:26

Design Example: Sustainability in Concrete Building

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As the construction industry moves towards more eco-friendly practices, concrete's adaptability and its ability to incorporate sustainable features make it a key material in the drive towards greener building solutions.
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground...
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Design Example: Managing Concrete Workability01:14

Design Example: Managing Concrete Workability

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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.
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Hot Weather Concreting01:20

Hot Weather Concreting

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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,...
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Factors Affecting Workability01:24

Factors Affecting Workability

358
The workability of concrete is a critical characteristic that influences the ease of mixing, handling, and finishing the concrete. It is affected by several factors including water content, aggregate properties, and admixtures like air entrainment. Water plays a fundamental role as it lubricates the concrete mix, facilitating easier movement and placement. However, the water requirement varies depending on the texture and shape of aggregates. Finer particles and angular, rough-textured...
358
Mass Concreting01:22

Mass Concreting

462
Mass concreting refers to the process of placing large volumes of concrete, such as in gravity dams. The heat generated during the cement hydration process and differential cooling rates within the concrete mass can lead to a temperature gradient, which can result in thermal cracks in the concrete mass.
To reduce the risk of such cracking, the concrete mix may incorporate low-heat cement and pozzolans to reduce the temperature rise. Pre-cooled angular aggregates and water-reducing admixtures...
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Survey Safety01:28

Survey Safety

486
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...
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Creating a climate for ergonomic changes in the construction industry.

Laura Boatman1, Debra Chaplan1, Suzanne Teran2

  • 1State Building and Construction Trades Council of California, California.

American Journal of Industrial Medicine
|July 7, 2015
PubMed
Summary
This summary is machine-generated.

Many construction workers believe musculoskeletal disorders are unavoidable, despite potential ergonomic solutions. Collaboration between contractors, unions, and workers is key to implementing practical, cost-effective changes to reduce physical demands and prevent injuries.

Keywords:
MSDconstructionergonomicsfocus groupinterventionmusculoskeletal disorderqualitative

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Area of Science:

  • Occupational Health
  • Construction Safety
  • Ergonomics

Background:

  • Construction work involves high physical demands, yet ergonomic solutions from other industries are often dismissed.
  • The applicability of ergonomic interventions in construction settings remains a significant challenge.

Purpose of the Study:

  • To explore the perceptions of construction professionals regarding the implementation of ergonomic solutions.
  • To identify barriers and facilitators for adopting ergonomic practices in the construction industry.

Main Methods:

  • Conducted 50 key informant interviews with contractor representatives and union staff.
  • Facilitated 4 focus groups with a total of 48 construction workers.

Main Results:

  • Workers often perceive work-related musculoskeletal disorders (WMSDs) as an inherent risk of the job.
  • Limited availability and accessibility of effective ergonomic tools that balance physical demand reduction with job efficiency were reported.
  • Despite obstacles, construction professionals proposed various solutions for ergonomic implementation.

Conclusions:

  • Effective ergonomic solutions require collaborative efforts between contractors, unions, and workers.
  • Implementation strategies must be economically viable within the current construction industry landscape.