What is good quality concrete?
A concrete is said to be of good quality, if it is strongest, densest, most workable and most economical for the job for which it is prepared. Amount of cement used in concrete should be low and that of aggregate should be high.
How will you prepare a good quality concrete?
How To Produce Good Quality Concrete?
- Use well graded, hard and durable aggregates.
- Use sufficient quantity of cement to achieve required water tightness and strength.
- Mix the concrete thoroughly for getting better homogeneity.
- Keep the water-cement ratio as minimum as possible.
How can you tell the quality of concrete?
The colour of cement gives an indication of excess lime or clay and the degree of burning.
- RUBBING. Take a pinch of cement between fingers and rub it.
- HAND INSERTION. Thrust your hand into the cement bag and it should give cool feeling.
- FLOAT TEST.
- SMELL TEST.
- PRESENCE OF LUMPS.
- SHAPE TEST.
- STRENGTH TEST.
How many types of concrete grades are there?
Different types of concrete grades and their uses
| Concrete Grade | Mix Ratio (cement : sand : aggregates) | Compressive Strength |
|---|---|---|
| M15 | 1 : 2 : 4 | 2175 psi |
| M20 | 1 : 1.5 : 3 | 2900 psi |
| Standard Grade of Concrete | ||
| M25 | 1 : 1 : 2 | 3625 psi |
What are the 5 types of concrete?
5 Types Of Concrete You Should Know About
- Reinforced Concrete.
- Lightweight Concrete.
- High-Strength Concrete.
- High-Performance Concrete.
- Precast Concrete.
What are the grades of concrete?
What are the grades in cement?
The three primary grades construction cement are called Ordinary Portland Cement (OPC) grades of cement….Depending on their classes, they can be used for a variety of applications, including mortar, stucco, grout, plaster, and concrete.
- 33 Grade Cement.
- 43 Grade Cement.
- 53 Grade Cement.
What is maturity of concrete?
Concrete maturity indicates how far curing has progressed. Maturity is the relationship between concrete temperature, time, and strength gain. It is represented by an index value that can be measured in real time in the field.
What is the strength of concrete?
Usually, the compressive strength of concrete varies from 2500 psi (17 MPa) to 4000 psi (28 MPa) and higher in residential and commercial structures. Several applications also utilize strengths greater than 10,000 psi (70 MPa).