*3.1. Development Parameters*

The vibration densities of the 10 mixtures proposed in Figure 1 are displayed in Table 1.


**Table 1.** Compositions and vacuum and vibration density of the 10 mixtures proposed for ENS development.

As shown in Table 1, the mixture that presented the greatest vibration density was Mixture 7 (1/3 coarse, 1/3 medium, and 1/3 fine particles), representing the closest-packed mixture. Therefore, Mixture 7 was chosen as a proportion of particle sizes for the ENS development.

The MAR was calculated through Equation (2) as 15%wt for the epoxy resin. This amount of resin is considered to be the minimum amount of matrix necessary to fill both interstitial and surface voids of the closest-packed mixture.

The ENS plates were produced with 1/3 of coarse particles of glass waste, 1/3 of medium particles of glass waste, and 1/3 of fine particles of quartz waste. Plates were produced with an amount of 15%wt epoxy resin (ENS-15), corresponding to the MAR, and also with 20%wt (ENS-20) of epoxy resin, aiming to verify whether the addition of resin would result in a more effective void filling that would be determined by its mechanical properties.
