Concrete Mix Design

Project & Strength

Project Name

Mix ID

Specified Compressive Strength, f’c (psi)

In FAA P-501 mode, this may be auto-governed by flexural strength correlation if selected.

Historical Standard Deviation, s (psi)

Leave blank if historical data is unavailable.

Required Slump (in)

Nominal Maximum Aggregate Size (in)

Air Entrained?

Exposure Classes

Select all applicable durability exposure classes. The most restrictive requirement controls.

Freeze-Thaw

Sulfate

Water

Corrosion / Chlorides

User-Specified Maximum w/cm

User-Specified Target Air (%)

Material Properties

Fine Aggregate Fineness Modulus

Coarse Aggregate Dry-Rodded Unit Weight (pcf)

SG Cement

SG Fine Aggregate

SG Coarse Aggregate

SG Fly Ash / Slag / Silica Fume

SCM & Admixtures

Fly Ash Replacement (%)

Slag Replacement (%)

Silica Fume Replacement (%)

Water Reducer Water Reduction (%)

Admixture Dosage (oz/cwt)

Minimum Cementitious Content (lb/yd³)

Maximum Cementitious Content (lb/yd³)

Aggregate Moisture

Fine Aggregate Absorption (%)

Fine Aggregate Moisture Content (%)

Coarse Aggregate Absorption (%)

Coarse Aggregate Moisture Content (%)

Optimization

Run Optimization?

Optimization Objective

FAA P-501 Airfield PCC Pavement Criteria

Pavement Application

Paving Method

Specified Flexural Strength, MR (psi)

Target Flexural Strength (psi)

Strength Test Age (days)

Use MR to Estimate f’c?

MR Correlation Factor, k

Approximation: MR = k√f’c. Calibrate with project materials.

P-501 Max w/cm

Minimum Slump (in)

Maximum Slump (in)

Minimum Air (%)

Maximum Air (%)

P-501 Min Cementitious (lb/yd³)

P-501 Max Cementitious (lb/yd³)

Test Strip / Trial Section Required?

Doweled Pavement?

Deicing Exposure?

FAA P-501 mode is a screening layer. Project-specific AC 150/5370-10, Item P-501 edits, local materials, trial batches, and contract requirements govern final acceptance.

Selected w/cm

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Cementitious Content

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Cost / yd³

—

CO₂ / yd³

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FAA P-501 Compliance Dashboard

P-501 Status

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Specified MR

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Target MR

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Estimated f’c from MR

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P-501 Checks

SSD Mix Proportions

Field Batch Weights with Moisture Correction

Durability & General Compliance Checks

Optimization Results

Material Proportion Chart

Absolute Volume Chart

Cost Contribution

Optimization Candidate Comparison

Formula Sheet & Engineering Basis

1. Absolute Volume Method

Volume Balance

V_cement + V_SCM + V_water + V_FA + V_CA + V_air + V_admix = 27.0 ft³/yd³

V = absolute volume of each constituent.

FA = fine aggregate; CA = coarse aggregate.

Absolute Volume of Each Material

V_i = W_i / (SG_i γ_w)

W_i = material weight, lb.

SG_i = specific gravity.

γ_w = unit weight of water = 62.4 lb/ft³.

2. Strength and Water-Cementitious Ratio

Water-Cementitious Ratio

w/cm = W_water / W_cementitious

Required Cementitious Content

W_cementitious = W_water / (w/cm)_selected

Required Average Compressive Strength

f′_cr = max(f′_c + 1.34s, f′_c + 2.33s − 500)

f′_cr = required average compressive strength.

f′_c = specified compressive strength.

s = historical standard deviation.

3. FAA P-501 Flexural Strength Screening

Approximate MR-to-Compressive Strength Correlation

MR = k√f′_c

f′_c,est = (MR / k)²

MR = modulus of rupture / flexural strength, psi.

k = project-calibrated correlation factor.

This correlation is approximate and must be verified with project-specific materials and trial batch data.

4. Aggregate Moisture Correction

Wet Batch Aggregate Weight

W_batch,agg = W_SSD(1 + MC/100)

Free Water Contribution

W_freewater = W_SSD[(MC − Abs)/100]

Corrected Batch Water

W_batch,water = W_design,water − ΣW_freewater

5. Cost and CO₂ Estimate

Material Cost per Cubic Yard

C_total = Σ(W_iC_i) + V_admixC_admix

Embodied Carbon Estimate

CO₂_total = Σ(W_iEF_i)

6. References

ACI 211.1 — Standard Practice for Selecting Proportions for Normal, Heavyweight, and Mass Concrete.
ACI 318 — Building Code Requirements for Structural Concrete, durability exposure-class requirements.
FAA AC 150/5370-10, Item P-501 — Cement Concrete Pavement.
PCA — Design and Control of Concrete Mixtures.

Engineering note: This calculator is intended for preliminary engineering mix proportioning, education, and comparison. Final mixture approval should be based on project specifications, local materials, laboratory trial batches, field performance, FAA/ACI requirements, and approval by the engineer of record.

Advanced Concrete Mix Design Calculator