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Design Example: Joints in Concrete Pavements

Design Example: Joints in Concrete Pavements

Concrete pavement joints are essential for maintaining the structural integrity and longevity of pavement by controlling where and how the pavement cracks. These joints can be categorized based on their functions, such as contraction or control joints, construction joints, isolation joints, and expansion joints.
Contraction joints are typically formed by sawing a groove into the concrete shortly after it has hardened. This creates a weakened vertical plane, deliberately encouraging cracking at...

Masonry Paving

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The construction of masonry paving involves using materials such as bricks, stones, and concrete masonry units. These materials are chosen for their shape, color, strength, and resistance to abrasion and weathering. Masonry units can be installed dry on a thin layer of sand and a gravel base, or they can be embedded in mortar or asphalt on a concrete slab. For areas subjected to heavy vehicular loads, a rigid base layer of reinforced or unreinforced concrete is recommended. In contrast,...

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.
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Design Example: Managing Concrete Workability

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Placing Concrete

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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,...

Additives and Fillers in Concrete

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Advanced Self-Healing Asphalt Reinforced by Graphene Structures: An Atomistic Insight

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Recent applications of waste solid materials in pavement engineering.

Zifeng Zhao¹, Feipeng Xiao¹, Serji Amirkhanian¹

¹Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, 4800 Cao'an Highway, Jiading District, Shanghai 201804, China.

Waste Management (New York, N.Y.)

|April 29, 2020

Summary

This review highlights six key solid waste materials, including recycled concrete aggregates and fly ash, for sustainable pavement engineering. Research shows these materials offer significant environmental and economic advantages in road construction.

Keywords:

Economic analysis Environmental analysis Life cycle assessment Novel researches Pavement engineering Solid waste materials Treatment

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Area of Science:

Civil Engineering
Environmental Science
Materials Science

Background:

Massive generation of municipal, industrial, and domestic solid wastes presents disposal challenges.
Limited utilization of diverse solid waste materials in current pavement construction practices.
Need for sustainable and cost-effective alternatives in civil engineering applications.

Purpose of the Study:

To review and analyze the application of six prominent solid waste materials in pavement structures.
To consolidate recent research findings on structural properties, treatments, and performance.
To assess the environmental and economic viability of using these waste materials in pavement engineering.

Main Methods:

Systematic literature review of papers published between 2014 and 2019 from reputable journals.
Selection criteria focused on waste management, characterization, and economic/environmental assessments.
Narrowed scope to six materials: recycled concrete aggregates, reclaimed asphalt pavement, fly ash, bottom ash, waste rubber, and waste plastics.

Main Results:

Detailed analysis of structural properties, necessary treatments, and novel research for each selected waste material.
Compilation of environmental and economic assessments demonstrating the benefits of waste material incorporation.
Identification of limitations and areas for improvement in the application of these materials.

Conclusions:

Significant advancements in workmanship, construction methodology, and treatment techniques for solid waste materials in pavements.
Overwhelming evidence supports the environmental and economic benefits of utilizing these materials in real-world applications.
Encouragement for future research in pavement engineering focusing on material properties and holistic environmental/economic impacts.