Name: concrete pavement joint types and functions
Uploaded: 2025-06-13T10:43:57.000Z
Duration: 1 min 28 s
Channel: JoVE

The extension of an existing plain concrete pavement is proposed for construction using concrete slabs, ensuring minimal pavement cracking.
A pavement engineer decides to provide construction, expansion, isolation, and contraction joints to control pavement cracking.
The construction joints are gaps provided between the new slab and an existing slab to allow any possible movements in the new slab. Dowel bars embedded in the concrete tie the adjacent slabs together.
The expansion joints are gaps provided between adjacent slabs to allow concrete's thermal expansion.
Its construction involves arranging dowel bars in rows in the pavement's transverse direction and pouring concrete over the bars.
The gap left is then filled with compressible fillers and sealants.
Isolation joints are provided where the pavement encounters a manhole. A half-inch wide joint around the manhole, filled with a compressible material, forms the isolation joint.
Finally, the contraction joint is provided by sawing a groove in the recently hardened concrete pavement oriented perpendicular to the direction of traffic flow.
This helps to localize and control crack formation during concrete's contraction.

ontwerpvoorbeeld: voegen in betonverhardingen

Betonnen bestratingsvoegen zijn essentieel voor het behoud van de structurele integriteit en levensduur van bestrating door te controleren waar en hoe het bestrating scheurt. Deze voegen kunnen worden gecategoriseerd op basis van hun functies, zoals krimp- of controle voegen, constructievoegen, isolatie voegen en uitzetvoegen.

Krimpvoegen worden meestal gevormd door een groef in het beton te zagen kort nadat het is uitgehard. Dit creëert een verzwakt verticaal vlak, wat opzettelijk scheuren op deze vooraf bepaalde locatie aanmoedigt in plaats van willekeurig over de betonplaat.

Isolatie voegen worden gebruikt waar een betonnen bestrating een ander oppervlak of een vast object ontmoet, zoals een kruising van wegen of een nutsvoorziening zoals een putdeksel. Deze voegen bevatten een samendrukbaar materiaal dat de volledige diepte van de voeg vult, waardoor aangrenzende structuren of oppervlakken onafhankelijk van de bestrating kunnen bewegen.

Bouwvoegen ontstaan ​​waar vers beton verhard beton ontmoet, vaak te zien aan het einde van een dag bestraten. Deze voegen beheren overgangen tussen verschillende secties van bestrating en verankeren deuvel staven of trekstaven tussen de secties.

Uitzetvoegen worden gebruikt om de potentiële uitzetting van betonplaten op te vangen. Deze voegen zijn cruciaal om de ontwikkeling van hoge drukkrachten te voorkomen, wat kan leiden tot afbrokkeling van de voeg of structurele opblazen. Ze bevatten doorgaans lastoverdracht voorzieningen zoals deuvels of trekstangen die beweging voornamelijk in de richting van de voeg mogelijk maken. Over het algemeen worden de voegen gevuld met vulmaterialen en afdichtingsmiddelen.

Ontwerpvoorbeeld: Voegen in Betonverhardingen

The extension of an existing plain concrete pavement is proposed for construction using concrete slabs, ensuring minimal pavement cracking.
A pavement ...

design-example-joints-in-concrete-pavements

Education

JoVE Core

Civil Engineering

Civiele techniek

Unit 1

Design Examples

Ontwerpvoorbeelden

KEY TERMS AND CONCEPTS

BELANGRIJKE TERMEN EN CONCEPTEN

Design Example: Joints in Concrete Pavements

concrete pavement joint types and functions

Concrete pavement joints guide where slabs crack and help protect the pavement over time. They support the structural integrity and long life of the concrete by controlling movement and cracking.

Contraction joints, also called control joints, are made by sawing a groove into the concrete soon after it hardens. This groove creates a weakened vertical plane. It encourages cracking at a planned location instead of letting cracks form randomly across the slab.

Isolation joints are used where the pavement meets another surface or a fixed object. Common examples include a roadway intersection or a utility fixture such as a manhole. These joints use compressible material that fills the full depth of the joint, so the pavement and nearby structure can move independently.

Construction joints appear where fresh concrete meets hardened concrete, often at the end of a paving day. They handle the transition between sections of pavement. Dowel bars or tie bars are embedded between the sections to help connect them.

Expansion joints allow concrete slabs to expand without building up too much compressive force. That helps prevent joint spalling and structural blowups. These joints usually include load transfer devices such as dowels or tie bars, which support movement mainly along the joint direction. In general, joints are finished with filler materials and sealants.

Concrete Pavement Joint Types and Functions

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design example: joints in concrete pavements

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key terms and concepts

Learn how contraction, isolation, construction, and expansion joints control cracking, movement, and support in concrete pavements.

Concrete Pavement Joint Types and Functions | JoVE K12

JoVE Core Civil Engineering provides a foundational exploration of essential construction materials in civil engineering, focusing on bricks, stones, steel, wood, and concrete through easy-to-understand animated videos. This collection covers the properties, manufacturing processes, and practical applications of these materials. Additionally, the accompanied science-in-action videos demonstrate the research experiments performed in laboratories.

Concrete Pavement Joint Types and Functions

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