# Portland Cement Specific Gravity

Specific gravity is normally used in mixture proportioning calculations.

- Canonical URL: https://pavementinteractive.org/reference-desk/testing/cement-tests/portland-cement-specific-gravity/
- Last updated: 2026-11-01
- Review: reviewed by licensed professional engineers on the previous Pavement Interactive site, where reviewers were not recorded by name
- Standards: AASHTO T 133, ASTM C188

Specific gravity is normally used in mixture proportioning calculations. The specific gravity of portland cement is generally around 3.15 while the specific gravity of portland-blast-furnace-slag and portland-pozzolan cements may have specific gravities near 2.90 (PCA, 1988[^1]).

## Standard Test Methods

- AASHTO T 133 and ASTM C 188: Density of [Hydraulic Cement](https://pavementinteractive.org/glossary/hydraulic-cement/)

## Sources

[^1]: Portland Cement Association (PCA) (1988). Design and Control of Concrete Mixtures. Portland Cement Association. Skokie, IL.