FAQ

What percentage of concrete is aggregate?

What percentage of concrete is aggregate?

A properly designed mixture possesses the desired workability for the fresh concrete and the required durability and strength for the hardened concrete. Typically, a mix is about 10 to 15 percent cement, 60 to 75 percent aggregate and 15 to 20 percent water.

What is the total percentage of fine aggregate in concrete by volume?

Fine aggregate content is usually 35\% to 45\% by mass or volume of the total aggregate content.

What is the ratio of fine aggregate?

A fineness modulus of 2.54 was attained by a suitable combination of fine and crushed sand. Distribution of particle size for fine and coarse aggregate (FA/CA). Hooked-ended steel fibers used in this investigation were as given in Figure 2, while their physico-mechanical properties are presented in Table 2.

What is fine aggregate in concrete?

– Fine aggregates are usually sand or crushed stone that are less than 9.55mm in diameter. Typically the most common size of aggregate used in construction is 20mm. A larger size, 40mm, is more common in mass concrete. Larger aggregate diameters reduce the quantity of cement and water needed.

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What are the properties of fine aggregate?

Properties of fine aggregates:

  • Size of fine aggregates: The largest size that falls under the limit of the exact set is 4.75 mm.
  • Strength:
  • Shape of fine aggregates:
  • Specific Gravity:
  • Surface Texture of fine aggregates:
  • Water Absorption:
  • Surface Index of fine aggregates:
  • Soundness:

What is the grading of aggregates?

Aggregate Grading – is a measure of how well distributed the sizes of the particles in an aggregate are. A well graded aggregate will have a good range of particle sizes and will have a fair representation from every size of particle.

What is the maximum size of fine aggregate?

Introduction to fine aggregates: The maximum size used is 80 mm and the range of 80 mm to 4.75 mn is known as coarse aggregate and 4.75 to 150 µm is called fine aggregate. Size 4.75 mm is common for both fine and coarse fractions.

Is code of fine aggregate?

IS: 456 – code of practice for plain and reinforced concrete. IS: 383 – specifications for fine and coarse aggregate from natural sources for concrete. IS: 2430 – methods of sampling. IS: 4082 – specifications for storage of materials.

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What is the effect of fine aggregate on concrete strength?

The results show that, workability of concrete decreased as fines content increases. At the same level of fines content, workability increases when the W/C increased. The study again revealed that up to 4\% fines content, compressive strength increased as the fines content increases.

What is the size of fine aggregates a 4.75 mm B 4.75 mm C 4.75 mm D 12mm?

4. What is the size of fine aggregates? Explanation: The size of the fine aggregates is less than 4.75mm because it passes from 4.75 mm sieve at its lowest so there is no chance for more than 4.75mm in its size. 5.

What is the grading of fine aggregate?

Grading of aggregates are determination of particle size distribution of aggregates. Grading of aggregates is an important factor for concrete mix design. These affect the concrete strength as well as durability. Proper grading is important for concrete construction.

What percentage of concrete is fine aggregates?

The fine and coarse aggregates generally occupy 60\% to 75\% of the concrete volume (70\% to 85\% by mass) and strongly influ- ence the concrete’s freshly mixed and hardened proper- ties, mixture proportions, and economy.

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What is the difference between fine and coarse aggregates?

The fine and coarse aggregates generally occupy 60\% to 75\% of the concrete volume (70\% to 85\% by mass) and strongly influ- ence the concrete’s freshly mixed and hardened proper- ties, mixture proportions, and economy. Fine aggregates (Fig. 5-1) generally consist of natural sand or crushed stone with most particles smaller than 5 mm (0.2 in.).

What type of aggregates are used in concrete construction?

The importance of using the right type and quality of aggregates cannot be overemphasized. The fine and coarse aggregates generally occupy 60\% to 75\% of the concrete volume (70\% to 85\% by mass) and strongly influ- ence the concrete’s freshly mixed and hardened proper- ties, mixture proportions, and economy. Fine aggregates (Fig.

What are the factors that affect the mix proportions of concrete?

Various factors such as fine aggregate fineness modulus, moisture content, specific gravity, and silt content affect the mix proportions of concrete. Fineness modulus specifies how much fine aggregate is required in a given mix design. Fine aggregate moisture content influences the mix proportion substantially.