Modeling Custom Concrete Mixes

Custom concrete mixes that suit the specific conditions/specifications of each project is becoming increasingly more common. These custom concrete mixes most likely won’t be available in our material library since they diverge from the standard mixes.

Concrete options that are currently available in our material library are a mix of the following specifications:

  • Blends – Portland Cement, blast furnace slag (5%-100%) & fly ash (5% – 100%)
  • Reinforcement – unreinforced, 1.0%, 1.5%, 3%
  • Strength (MPa) – unspecified, 20, 25, 30, 35, 40, 50, 60, 80, 100

Besides getting an EPD to model the concrete in eToolLCD, the other way to model these custom concrete mixes is to use our template customisation feature. eToolLCD’s templates can be customised to address the issue of missing concrete blend mixes even though it isn’t as elegant as using what’s already available in the material library. To make the process easier, we have created a custom concrete mix template to assist users by providing a guideline to creating their own custom concrete templates. You can view & clone this template via the link below:


In order to edit the template, you’ll first need to clone the template so that it is a private template that you can work on.

After that, note the instructions on how to use this template provided in the template’s ‘Details’ tab.

Basically all you have to do is to enter each component in the custom concrete mix as a separate element in the template. Note that the category for this template is set to the ‘Substructure’ category, however all the individual concrete mix elements have been entered in multiple categories within the template. The template’s category needs to be updated once you’ve entered the quantities for your material inputs.

When you click into the ‘Substructure’ category (or any of the other categories highlighted above), you’ll find the following inputs:

Users are to enter appropriate quantities into relevant concrete elements under the applicable category to ensure that the total material volume adds up to 1m3 of concrete. You may change the units for each element as applicable (kg/m3 etc). Enter quantities only in elements where applicable.

The following inputs should also be left in default to maintain consistency with other concrete templates unless otherwise specified (i.e. HS2 specifications).

After you’ve entered the quantities for all the relevant material inputs under the applicable category, please remember to rename your new custom concrete mix template and update the template category to reflect what has been edited.

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