Name: how mortar performance is measured
Uploaded: 2024-09-12T16:16:25.000Z
Duration: 1 min 17 s
Channel: JoVE

Un bon mortier à l’état plastique possède une bonne maniabilité et la capacité de retenir l’eau.
Une bonne maniabilité permet au mortier de s’étaler en douceur, d’adhérer aux surfaces verticales sans s’affaisser, d’extruder à partir des joints sans tomber et de positionner facilement les éléments de maçonnerie. La maniabilité du mortier est également évaluée par son comportement de glissement et son adhérence à la truelle.
La rétention d’eau consiste à éviter la perte d’eau dans l’atmosphère ou l’absorption par les éléments de maçonnerie.
Le mortier durcit et perd de sa plasticité, ce qui entraîne une résistance à la traction.
Cette résistance est évaluée en assemblant les briques avec du mortier, en les polymérisant, puis en séparant les unités à l’aide d’une machine d’essai de traction.
La force d’adhérence est généralement élevée sur les surfaces texturées, alors qu’elle est généralement faible sur les surfaces lisses.
La résistance à la compression est déterminée en testant des cubes de mortier durcis de 2 pouces dans une machine d’essai de compression en laboratoire pour enregistrer la charge maximale avant la rupture.
Dans la construction, le mortier se caractérise par : M, S, N et O, qui sont définis en fonction des valeurs de résistance à la compression après 28 jours.

propriétés du mortier

Les propriétés du mortier englobent une gamme de caractéristiques essentielles pour les travaux de construction et de maçonnerie, notamment la maniabilité, la rétention d'eau, la force d'adhérence, la durabilité, la résistance à la compression, le changement de volume et l'apparence. La maniabilité fait référence à la capacité du mortier à être facilement appliqué et manipulé sans s'affaisser ni tomber des surfaces, ce qui est important pour la mise en place et l'alignement efficaces des éléments de maçonnerie. La rétention d'eau est essentielle pour empêcher le mortier de perdre trop rapidement de l'humidité dans l'atmosphère ou dans des matériaux absorbants, garantissant qu'il reste plastique et maniable suffisamment longtemps pour coller efficacement les éléments de maçonnerie.

La force d'adhérence est essentielle pour l'intégrité structurelle des travaux de maçonnerie, affectant la capacité du mortier à adhérer aux éléments de maçonnerie et à résister aux forces de traction qui pourraient arracher la structure. Cette propriété est influencée par la texture du mortier, le taux d'absorption des éléments de maçonnerie et la qualité de l'exécution.

La durabilité et la résistance à la compression sont essentielles pour la capacité du mortier à résister respectivement aux conditions environnementales et aux charges. La durabilité du mortier garantit sa résistance aux intempéries, tandis que la résistance à la compression mesure la capacité du mortier à résister à l'écrasement sous charge, déterminée par des tests normalisés.

Enfin, l'apparence du mortier, notamment sa couleur et sa texture uniformes, affecte l'attrait esthétique des travaux de maçonnerie, avec des considérations spécifiques pour l'outillage et l'utilisation de pigments. La qualité globale du mortier, combinant ces propriétés, joue un rôle essentiel dans la réussite des projets de construction.

Propriétés du mortier

Un bon mortier à l’état plastique possède une bonne maniabilité et la capacité de retenir l’eau.
Une bonne maniabilité permet au mortier de s’étaler en douceur, d’adhérer ...

Education

Enseignement

JoVE Core

Civil Engineering

Génie civil

Unit 1

Unité 1

Masonry Materials

Matériaux de maçonnerie

KEY TERMS AND CONCEPTS

TERMES ET CONCEPTS CLÉS

Mortar Properties

how mortar performance is measured

Mortar performance is measured by several key properties that matter in masonry work. These include workability, water retention, bond strength, durability, compressive strength, volume change, and appearance. Together, these properties help determine how well mortar can be placed, bonded, and finished.

Workability is the ability of mortar to be applied and moved easily. Good workability means the mortar spreads smoothly and does not sag or fall off the surface. This helps masonry units stay aligned during placement.

Water retention is also important. It keeps mortar from losing moisture too quickly to the air or to absorbent masonry units. When mortar holds water well, it stays plastic and workable long enough to form a strong bond.

Bond strength affects how firmly mortar sticks to masonry units and how well it resists tensile forces, which are pulling forces. This property depends on the mortar texture, the absorption rate of the masonry units, and the quality of workmanship. Durability and compressive strength are also essential. Durability shows how well mortar resists weathering, while compressive strength measures its ability to resist crushing under load, usually through standardized tests.

Volume change and appearance are part of mortar quality as well. Volume change can affect the final fit and performance of the masonry. Appearance matters because uniform color and texture improve the look of the finished work, and tooling or pigments can influence that result. When these properties are balanced well, mortar supports both the strength and the appearance of a construction project.

How Mortar Performance Is Measured

masonry

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mortar properties

Mortar performance is measured by several key properties that matter in masonry work. These include workability, water retention, bond strength, durability, compressive strength, volume change, and appearance. Together, these properties help determine how well mortar can be placed, bonded, and finished. Workability is the ability of mortar to be applied and moved easily. Good workability means the mortar spreads smoothly and does not sag or fall off the surface. This helps masonry units stay...

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Types of Bricks in Construction

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How Brick Quality Affects Masonry Performance

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Brick Wall Bonds and Wythes

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Brick Cuts for Fitting Wall Spaces

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key terms and concepts

Learn the key mortar properties used in masonry, including workability, water retention, bond strength, durability, compressive strength, and appearance.

How Mortar Performance Is Measured | 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.

civil engineering

How Mortar Performance Is Measured

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