1. What is Volume of Products of Hydration Per Unit of Dry Cement?

Definition: This calculator determines the volume of solid products formed during cement hydration per unit volume of dry cement.

Purpose: It helps in understanding and predicting the volume changes that occur during cement hydration, which is crucial for concrete mix design.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V_p \) — Volume of Solid Products of Hydration (m³)
• \( V_{hc} \) — Volume of Hydrated Cement (m³ ±5%)
• \( V_{cah} \) — Absolute Volume of Dry Cement actually Hydrated (kg/m³ ±5%)

Explanation: The volume of hydrated cement is divided by the absolute volume of dry cement to determine the volume of solid hydration products formed.

3. Importance of Hydration Products Calculation

Details: Understanding hydration products helps predict concrete behavior, including strength development, porosity, and durability.

4. Using the Calculator

Tips: Enter the volume of hydrated cement (in m³) and absolute volume of dry cement (in kg/m³). The ±5% indicates the typical measurement tolerance.

5. Frequently Asked Questions (FAQ)

Q1: Why is there a ±5% tolerance?
A: The ±5% accounts for typical measurement variations and material inconsistencies in cement hydration.

Q2: What's a typical value for hydrated cement volume?
A: This varies by cement type but is typically between 0.00006 to 0.00008 m³ per kg of cement.

Q3: How does this relate to concrete strength?
A: More hydration products generally mean stronger concrete, up to the cement's maximum potential.

Q4: What affects the absolute volume of dry cement?
A: Cement composition, fineness, and degree of hydration all influence this value.

Q5: Can this predict concrete shrinkage?
A: Indirectly, as hydration products volume affects the pore structure and shrinkage potential.

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