Table of Contents
- 1 Which grade of concrete is used for mass concrete work?
- 2 Which may be used in mass concrete construction?
- 3 How many types of concrete grades are there?
- 4 Which grade of concrete is used in concrete works?
- 5 Where can I find guidance in the use of mass concrete?
- 6 What is the meaning of M80 grade of concrete?
Which grade of concrete is used for mass concrete work?
Nominal Mix
| Grade of Concrete | Maximum Quantity of Dry Coarse and Fine Aggregates by Mass per 50 kg of Cement (kg) | Proportion of Fine Aggregates to Coarse Aggregates by Mass |
|---|---|---|
| M 5 M 7.5 M 10 M 15 M 20 | 800 625 480 350 250 | Generally, 1:2 but subject to an upper limit of 1:1.5 and a lower limit of 1: 2.5 |
Which may be used in mass concrete construction?
This cement offer: The heat of hydration of Portland slag cement is lower than OPC. Therefore, this cement can be used in mass concreting.
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 is the lightweight concrete?
Lightweight concrete is a mixture made with lightweight coarse aggregates such as shale, clay, or slate, which give it its characteristic low density. It is being increasingly used to build sleek foundations, and has emerged as a viable alternative to regular concrete.
What is mass concreting?
The mass concreting technique is used for massive structures such as dams and large bridge piers and foundations. Mass concrete is basically concrete with a higher proportion of coarse aggregate and a lesser proportion of cement, Large size aggregates are preferred for mass concrete.
Which grade of concrete is used in concrete works?
Regular grades of concrete are M15, M20, M25, etc. For plain cement concrete works, generally, M15 is used. For reinforced concrete construction minimum M20 grade of concrete is used. For one cu m, calculate the cement, sand, and aggregate with 0.5 ratios of water for the following grades of concrete M10, M15, M20, M25, and M30. DRY VOLUME 1.54
Where can I find guidance in the use of mass concrete?
The ACI Committee 207 provides several reports for guidance in the use of mass concrete. ACI 207.1, Guide to Mass Concrete, is the primary resource for guidance in the use of mass concrete for structural building elements.
What is the meaning of M80 grade of concrete?
In M80 grade of concrete “M” denoted by Mix ratio & 80 denotes compressive strength of a 150 mm cube after 28 days of curing, indicates in N / mm2. M80 grade of concrete is used in reinforced cement concrete (RCC) construction where high compressive strength is needed like high rise buildings, bridges having long distance etc.