What are the properties of aggregate that affects the concrete properties?

These properties include shape and texture, size gradation, moisture content, specific gravity, reactivity, soundness and bulk unit weight. These properties along with the water/cementitious material ratio determine the strength, workability, and durability of concrete.

What are the factors affecting properties of concrete?

Concrete strength is affected by many factors, such as quality of raw materials, water/cement ratio, coarse/fine aggregate ratio, age of concrete, compaction of concrete, temperature, relative humidity and curing of concrete.

How aggregate properties influence the hardened concrete properties?

The following properties of aggregate affect the properties of hardened concrete.

• Grading.
• Bulk Density.
• Particle Specific Gravity.
• Particle Shape.
• Surface Texture.
• Strength.
• Shrinkage.

How various properties of aggregate affect workability of concrete?

Size of Aggregates Finer particles require more water for a larger surface, hence aggregate with finer particles need more water to make it workable. On the other hand, bigger particles have less surface area, demand less water for wetting surface and require less amount of paste for lubricating.

What are aggregates in concrete?

Concrete aggregates are composed of geological materials such as gravel, sand and crushed rock. The size of the particles determines whether it is a coarse aggregate (e.g. gravel) or a fine aggregate (e.g. sand). The resulting concrete can be used in its natural state or crushed, according to its use and application.

Which coarse aggregate characteristics affect concrete properties and how?

Coarse aggregates have properties such as size, shape, moisture contents, specific gravity, density etc. which affects concrete strength and durability in many ways. These effect of aggregate properties on concrete are discussed in detail. Concrete is a mixture of cementitious material, aggregate and water.

Which aggregate properties have the highest influence on concrete workability?

Concrete is more workable when smooth and rounded aggregate is used instead of rough angular or elongated aggregate. Crushed stone produces much more angular and elongated aggregate, which have a higher surface to volume ratio better bond characteristics but require more cement paste to produce a workable mixture.