For a strong, ductile and durable construction the reinforcement needs to have the following properties at least: High relative strength . High toleration of tensile strain . Good bond to the concrete , irrespective of pH, moisture, and similar factors.
What are the 4 main properties of concrete?
- Mechanical strength, in particular compressive strength. The strength of normal concrete varies between 25 and 40 MPa. ...
- Durability. ...
- Porosity and density. ...
- Fire resistance.
- Thermal and acoustic insulation properties.
- Impact resistance.
What are properties of reinforced concrete?
| Concrete Steel | strength in shear fair good | durability good corrodes if unprotected | fire resistance good poor — suffers rapid loss of strength at high temperatures |
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What are the properties of concrete?
Concrete has strength, durability, versatility, and economy . It can be placed or molded into virtually any shape and reproduce any surface texture.
What is the advantage of reinforced concrete?
Advantages of Reinforced Concrete
Reinforced concrete has a high compressive strength compared to other building materials. Due to the provided reinforcement, reinforced concrete can also withstand a good amount tensile stress. Fire and weather resistance of reinforced concrete is fair.
What are the disadvantages of precast concrete?
- High Initial Investment: For installing a Precast Concrete plant, heavy and sophisticated machines are necessary which requires a high initial investment. ...
- Transportation Issue: The construction site can be at a distant location from the Precast Concrete plant.
What are the mechanical properties of concrete?
Performance of concrete is evaluated from mechanical properties which include shrinkage and creep, compressive strength, tensile strength, flexural strength, and modulus of elasticity .
What is the most important property of concrete?
The compressive strength of concrete is considered one of the most important structural properties it has. As an industrial standard, concrete is classified by different grades. These grades are based on the compressive strength of the material when a specimen of it is made into a cube or a cylinder.
Is concrete waterproof?
Concrete is inherently water-resistant , so it is an ideal construction material for structures such as basements and bridges. ... With a higher water/cement ratio, the concrete will become more porous.
What are the disadvantages of concrete?
- Compared to other binding materials, the tensile strength of concrete is relatively low.
- Concrete is less ductile.
- The weight of compared is high compared to its strength.
- Concrete may contains soluble salts. Soluble salts cause efflorescence.
What are the advantages of concrete?
- Concrete is Economical. ...
- Concrete Hardens at Ambient Temperature. ...
- Ability to be Cast into Shape. ...
- Energy Efficiency in Production. ...
- Excellent Water Resistance Characteristics. ...
- High-temperature resistance. ...
- Ability to Consume and Recycle Waste. ...
- Application in Reinforced Concrete.
What is the function of concrete?
Concrete is the most commonly used man-made material on earth. It is an important construction material used extensively in buildings, bridges, roads and dams . Its uses range from structural applications, to paviours, kerbs, pipes and drains.
Is reinforced concrete strong?
Reinforced concrete (RC) is a versatile composite and one of the most widely used materials in modern construction. Concrete is a relatively brittle material that is strong under compression but less so in tension . ... This reinforcement, often known as rebar, resists tensile forces.
Is reinforced concrete stronger than steel?
Steel has the highest strength to weight ratio among building materials, including concrete. Steel is eight times (8X) stronger than concrete in tension and shear ; steel is resilient unlike concrete; and steel has better resistance to tensile, compressive, and flexural stress.
Is precast concrete cheaper?
Precast Concrete Walls Cost
Because it’s an estimated 23% less expensive than poured concrete , installing a precast concrete wall costs $4,820 on average. While precast materials span from $20 to $30 per square foot, it’s a lot less labor intensive than the traditional pouring method..
What are the characteristics of simple precast concrete?
Precast concrete is a construction product produced by casting concrete in a reusable mold or “form” which is then cured in a controlled environment, transported to the construction site and lifted into place (“tilt up”). In contrast, cast-in-place concrete is poured into site-specific forms and cured on site.
