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Difficulty: EasyConcrete and Masonry Materials

Match each concrete and masonry material to its primary functional description.

  • Portland cementA fine mineral powder that acts as the primary hydraulic binder when mixed with water
  • MortarA bonding mixture of cement, fine sand, and water used to bed and adhere bricks or blocks
  • Aggregate (sand and gravel)Granular materials that provide bulk volume, stability, and compressive body to concrete
  • Rebar (reinforcing steel)Steel bars embedded in concrete members to resist tensile and bending loads

Answer

Portland cement pairs with the fine mineral hydraulic binder; Mortar pairs with the bonding mixture used to adhere masonry units; Aggregate pairs with the granular materials providing bulk volume and compressive body; Rebar pairs with the embedded steel bars resisting tensile and bending loads.
Each material is matched according to its fundamental role in construction: Portland cement serves as the hydraulic binder; mortar provides adhesive bedding between masonry units; aggregate supplies the bulk volume and compressive mass; and rebar provides tensile reinforcement against bending and stretching forces.

Step-by-Step Solution

1
Identify the primary chemical binder in concrete mixes.
Portland cement is the hydraulic binder that hardens when combined with water.
Without cement paste, loose aggregate cannot form solid concrete.
2
Distinguish between structural concrete and masonry jointing material.
Mortar contains fine sand and binder paste designed specifically to bed and bond masonry units.
Mortar excludes coarse gravel so it can fit cleanly into narrow masonry joints.
3
Identify the component providing the bulk structural volume of the mix.
Aggregates (sand and crushed stone/gravel) form the structural filler and compressive mass.
Aggregates make up roughly 60% to 75% of total concrete volume.
4
Identify the structural reinforcement used to counter concrete's low tensile strength.
Rebar (steel reinforcing bar) adds tensile resistance to concrete elements.
Concrete excels under compressive loading but cracks easily under tension without steel reinforcement.

Key Concept

Basic Composition and Functions of Concrete and Masonry Materials
Estimated Time:45s
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Topics

Concrete and Masonry Materials

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