How does the Predictive Strength Model estimate strength, and what are its limits?

Overview

The Predictive Strength Model is Climate Earth's own proprietary model for estimating the compressive strength of a mix design at different ages. For the mix on screen, it shows the strength it expects at every age, so you can see how a mix is likely to perform against each strength requirement before you batch it.

How it was developed

The model was informed by open-source models, academic research, industry partnerships, and data exclusive to Climate Earth.

What it uses

The model estimates expected compressive strength from these inputs:

Input	General context
w/cm	The water-to-cementitious materials ratio. A lower w/cm generally means higher strength.
Cementitious content	The total amount of cement and SCMs per unit volume of concrete.
Paste volume	The volume of cementitious materials, water and air that binds the aggregates together.
SCM type and replacement level	Different SCMs, and how much cement they replace, change how strength develops over time.
Fly ash class	Fly ash classes (for example Class F and Class C) behave differently.
Air content	Higher air content generally lowers strength.

What it doesn't use

Slump
Admixture dosage
Predictions apply within the range of mixes used to calibrate the model.
Silica fume and blends using two SCMs (for example, fly ash and slag cement together) aren't supported by the strength model. This also applies to Enhance.
If a mix's proportions sit outside the model's data, strength can't be predicted reliably, and Enhance may not be able to return a mix.

Because the model doesn't use admixture dosage, changing a dosage doesn't change the predicted strength. Confirm admixture effects on strength through trial batches and laboratory testing.

Where it applies What it doesn't replace

Predictions don't replace trial batches, laboratory testing, or engineering review. Use them to compare options and focus your early design work, then validate the mix you intend to use.