What Is Admixture?

• Chemical
• Mineral

Types of Admixtures Used in Concrete

1. Water Reducing Admixture

2. Retarding Admixture

3. Accelerating Admixture

4. Air Entraining Admixtures

5. Pozzolanic Admixture

6. Moisture-Proof Admixture

7. Gas Formation Admixture

8. Air Detraining Admixtures

9. Alkaline Aggregate Expansion that Prevents Admixture

10. Anti-Wash Admixture

11. Grouting Admixture

12. Corrosion Prevention Admixture

13. Bonding Admixture

14. Fungicidal, Germicidal, and Insecticidal Admixture

15. Coloring Admixture

Advantages of Admixture

1. The mixing of concrete can accelerate the setting time.
2. There are some enzymes that work as an anti-bacterial agent.
3. There are mixtures of concrete that reduce the initial strength but increase the strength of hardened concrete compared to normal concrete.
4. It reduces the initial heat of hydration and overcomes the problem of thermal cracking in concrete; if there is excess heat of hydration the cracks can spread to the fresh concrete.
5. Admixtures improve the resistance against the freeze-melting effect on concrete.
6. Concrete mixtures maintain maximum stability by bringing waste products into use
7. Admixtures reduce the required amount of cement and make concrete economical.
8. They enhance the practicality of concrete.
9. Admixtures provide initial strength in concrete.

Disadvantages of Admixture

1. CaCl2 high risk of corrosion of steel – not allowed in reinforced concrete.
2. It is more expensive and less effective.
3. This increased drying shrinkage.
4. This provides less resistance to sulfate attack.

What Are Concrete Admixtures?

What Are the Admixtures Used in Concrete?

1. Water Reducing Admixture.
2. Retarding Admixture.
3. Accelerating Admixture.
4. Air Entraining Admixtures.
5. Pozzolanic Admixture.
6. Moisture–proof Admixture.
7. Gas Formation Admixture.
8. Air Detraining Admixtures.
9. Alkaline Aggregate Expansion that Prevents Admixture.
10. Anti–Wash Admixture.
11. Grouting Admixture.
12. Corrosion Prevention Admixture.
13. Bonding Admixture.
14. Fungicidal, Germicidal, and Insecticidal Admixture.
15. Coloring Admixture.

Purpose of Admixture

What Is the Purpose of Admixture in Concrete?

What Is the Function of Admixture?

Concrete Admixture for High-Strength Applications

Types of Chemical Admixtures for Construction

Admixture Dosage Guidelines for Concrete

• Water Reducers/Plasticizers: Typically, dosages range from 0.1% to 0.5% by weight of cementitious materials.
• Retarders: Dosages typically range from 0.1% to 0.5% by weight of cementitious materials.
• Accelerators: Range from 2% to 5% by weight of cementitious materials.
• Air-Entraining Agents: Dosages are typically specified as a volume percentage of the total concrete volume and can range from 0.01% to 0.5%.
• Superplasticizers: Dosages typically range from 0.5% to 3% by weight of cementitious materials.

Benefits of Using Admixtures in Construction

Admixture Compatibility with Different Cement Types

Admixture Meaning

What Is Admixture in Concrete?

Define Admixture

What Are Admixtures?

Type of Admixture

How Many Types of Admixture?

• Water-Reducing Admixtures
• Retarding Admixtures
• Accelerating Admixtures
• Air-Entraining Admixtures
• Plasticizers or Superplasticizers
• Pozzolanic Admixtures
• Corrosion-Inhibiting Admixtures
• Shrinkage-Reducing Admixtures

What Are the Different Types of Admixtures Used in Concrete?

• Water Reducing Admixtures.
• Retarding Admixtures.
• Accelerating Admixtures.
• Air entraining concrete admixture.
• Pozzolanic Admixtures.
• Damp-proofing Admixtures.
• Gas forming Admixtures.
• Air detraining Admixtures.

What Is the Other Name of Admixture?

• Retarding Admixtures for Concrete
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