## Materials and Methods  
### Materials  
The following materials were used to undertake this study: cement, CCW, water, foam, and additives. Three types of Portland cement were used, which were designated according to the Brazilian standard (NBR 16697/2018): CP II-Z (made with the addition of fly ash); CP II-F (made with the addition of limestone filler); and CP V-ARI (which is a high initial strength cement, without pozzolanic addition). The physical and chemical properties of Portland cement are shown in Table 1.  
Table 2 shows the composition of the cements, calculated from the Bogue equations [27]. CCW was used as an aggregate that totally replaces natural sand. This residue was collected in the region of Passo Fundo-RS-Brazil and characterized by [PERSON] et al. [22]. Figure 1a shows the grain size curve for the CCW used and Figure 1b shows the CCW. Note that this granulometry falls within the usual ranges for the use of fine aggregates when producing concrete and is in accordance with the Brazilian standard NBR 7211 [28]. \begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Cement Type**} & \multicolumn{4}{c}{**Spelling Time**} & \multicolumn{4}{c}{**Physical Properties**} & \multicolumn{4}{c}{**Compressive Strength**} \\ \cline{2-10}  & \multicolumn{2}{c}{**Initial**} & \multicolumn{1}{c}{**Last**} & \multicolumn{1}{c}{**Bainer**} & \multirow{2}{*}{**\#200\%**} & \multirow{2}{*}{**\#\#\%**} & \multirow{2}{*}{**\#325\%**} & \multirow{2}{*}{
\begin{tabular}{c} **Hot** \\ **Expansion** \\ **mm** \\ \end{tabular} } & \multicolumn{2}{c}{**Specific**} & \multicolumn{2}{c}{**Compressive Strength**} \\ \cline{2-10}  & \multicolumn{2}{c}{**Initial**} & \multicolumn{1}{c}{**Last**} & \multicolumn{1}{c}{**Lasm/g**} & \multicolumn{1}{c}{**Lasm/g**} & \multicolumn{1}{c}{**} & \multicolumn{1}{c}{**} & \multicolumn{1}{c}{**} & \multicolumn{1}{c}{**} & \multicolumn{1}{c}{**} \\  & \multicolumn{1}{c}{**Initial**} & \multicolumn{1}{c}{**Last**} & \multicolumn{1}{c}{**Lasm/g**} & \multicolumn{1}{c}{**Lasm/g**} & \multicolumn{1}{c}{**Lasm/g**} & \multicolumn{1}{c}{**Lasm/g**} & \multicolumn{1}{c}{**Lasm/g**} & \multicolumn{1}{c}{**Lasm/g**} & \multicolumn{1}{c}{**Lasm/g**} \\ \hline CP II-F & 03:52 & 04:38 & 3.291 & 2.75 & 13.31 & 0.28 & 3.11 & 28.2 & 34.5 & 42.0 \\ CP II-Z & 04:15 & 05:03 & 3.583 & 2.54 & 9.57 & 0.22 & 2.96 & 25.8 & 33.3 & 42.0 \\ CP V-ARI & 03:19 & 04:01 & 4.448 & 0.08 & 0.52 & 0.25 & 3.05 & 38.4 & 44.9 & 53.6 \\ \hline \multirow{2}{*}{**Cement Type**} & \multicolumn{4}{c}{**Chemical Properties**} & \multicolumn{4}{c}{**Lasm/g**} & \multicolumn{1}{c}{**Lasm/g**} & \multicolumn{1}{c}{**Lasm/g**} \\ \cline{2-10}  & \multicolumn{2}{c}{**Al2O3 \%**} & \multicolumn{1}{c}{**SiO2 \%**} & \multicolumn{1}{c}{**Fe2O3 \%**} & \multicolumn{1}{c}{**CaO \%**} & \multicolumn{1}{c}{**MgO \%**} & \multicolumn{1}{c}{**SO3 \%**} & \multicolumn{1}{c}{**LO.1 \%**} & \multicolumn{1}{c}{**Free CaO \%**} & \multicolumn{1}{c}{**LR. \%**} & \multicolumn{1}{c}{**A.C. \%**} \\ \hline CP II-F & 4.17 & 18.46 & 2.93 & 60.60 & 3.78 & 2.78 & 4.85 & 0.60 & 1.16 & 0.69 \\ CP II-Z & 6.01 & 20.14 & 3.10 & 54.60 & 3.45 & 2.69 & 5.51 & 0.57 & 10.96 & 0.84 \\ CP V-ARI & 4.22 & 18.80 & 2.95 & 60.27 & 3.91 & 3.14 & 3.33 & 0.68 & 0.75 & 0.69 \\ \hline \hline \end{tabular}
\end{table} 
Table 1: The properties of the cements. \begin{table}
\begin{tabular}{c c c c c} \hline \hline \multicolumn{1}{c}{**Cement Type**} & \multicolumn{1}{c}{**C3S (\%)**} & \multicolumn{1}{c}{**C2S (\%)**} & \multicolumn{1}{c}{**C3A (\%)**} & \multicolumn{1}{c}{**C4 AF (\%)**} & \multicolumn{1}{c}{**C4 AF + C2F**} \\ \hline CP II-F & 66.3 & 2.9 & 6.1 & 8.9 & \\ CP II-Z & 25.7 & 38.5 & - & - & 17.9 \\ CP V-ARI & 61.0 & 7.9 & 6.2 & 9.0 & \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Estimated values of the potential composition for each cement using Bogue. The agent used to produce the foam was amide 90 (diethanolamide 90% coconut fatty acid made by Asher (Produtos Quimicos Ltda, Ribeirao Preto, Brazil) and water in a proportion of 1:30.