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Splitting Tensile Strength of Concrete Calculator

Splitting Tensile Strength Formula:

\[ \sigma_{sp} = \frac{2 \times W_{load}}{\pi \times D_1 \times L_c} \]

N
mm
mm
%

1. What is Splitting Tensile Strength of Concrete?

Definition: Splitting tensile strength is determined by applying a diametric compressive load along the entire length of a cylinder until failure occurs.

Purpose: It measures the tensile strength of concrete indirectly, which is important for structural design and quality control.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ \sigma_{sp} = \frac{2 \times W_{load}}{\pi \times D_1 \times L_c} \]

Where:

  • \( \sigma_{sp} \) — Splitting tensile strength (Pa)
  • \( W_{load} \) — Maximum load applied (N)
  • \( D_1 \) — Diameter of cylinder (m)
  • \( L_c \) — Length of cylinder (m)

Note: The calculator automatically converts mm inputs to meters for calculation.

3. Importance of Splitting Tensile Strength

Details: Concrete is much weaker in tension than compression. Knowing tensile strength helps prevent cracking and structural failure.

4. Using the Calculator

Tips: Enter the maximum load in Newtons, cylinder dimensions in mm, and tolerance percentage (default ±5%). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is tensile strength important for concrete?
A: While concrete is strong in compression, it's weak in tension. Tensile strength affects cracking resistance and durability.

Q2: What's a typical splitting tensile strength for concrete?
A: Typically 10-15% of compressive strength. For 3000 psi concrete, expect about 300-450 psi splitting tensile strength.

Q3: Why include a tolerance percentage?
A: The tolerance accounts for material variability and testing inconsistencies (±5% is common).

Q4: How does cylinder size affect results?
A: Standard test cylinders are 150mm diameter × 300mm length. Different sizes require correction factors.

Q5: What affects splitting tensile strength?
A: Water-cement ratio, aggregate type, curing conditions, and concrete age all influence results.

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