## 3 Results
### Analysis of Publication Sources  
Figure 4 presents the network of publication sources in the LBAs research. The size of each node is related to the number of publications in the journals. In addition, the journals are grouped into 4 clusters (separated by color). The clusters suggest that those journals have a higher degree of interconnection (in terms of citation). Thus, articles published in journals from the same cluster tend to be mutually cited. Therefore, the citations from _Polymers_ are more correlated with _Construction and Building Materials_ and _Cement and concrete composites_.  
Figure 3: Annual publication trend in LBAs research from 2011 to 2021.  
Table 1 shows the most relevant journals in LBAs research, organized according to the number of published articles. _Construction and Building Materials_ is the scientific journal with the highest number of publications in the LBAs research, which justifies the size of the node shown in Figure 4. _Construction and Building Materials_ also presents a significant number of citations and average normalized citations. The normalization parameter corrects the fact that older articles have had more time to be cited and, therefore, may have a higher number of citations when compared to more recent articles [53].  
\begin{table}
\begin{tabular}{c c c c c c} \hline
**Journal Source** & **No. of Articles** & **Citations** & **Total Link Strength** & **Average Citations** & **Av. Norm. Citations** \\ \hline _Construction and_ & 14 & 292 & 6 & 20.86 & 1.53 \\ _Building Materials_ & 10 & 186 & 16 & 18.60 & 1.54 \\ _Cement and Concrete_ & 9 & 207 & 15 & 23.00 & 1.41 \\ _Chemistry and Eng._ & & & & & \\ _Advances in Cement_ & 8 & 25 & 5 & 3.13 & 0.18 \\ _Research_ & 5 & 330 & 2 & 66.00 & 1.95 \\ _Cement and Concrete_ & & & & & \\ _Composites_ & 4 & 189 & 6 & 47.25 & 1.79 \\ _Industrial Crops and Products_ & 4 & 58 & 10 & 14.50 & 1.3 \\ _RSC Advances_ & 4 & 92 & 12 & 23.00 & 1.19 \\ _Industrial and Eng._ & & & & & \\ _Chemistry Research_ & 4 & 45 & 10 & 11.25 & 0.86 \\ _Polymers_ & 4 & 48 & 5 & 12.00 & 0.56 \\ _Holzforschung_ & 3 & 116 & 3 & 38.67 & 1.87 \\ _ACI Materials Journal_ & 3 & 45 & 0 & 15.00 & 0.77 \\ _Journal of Wood_ & 3 & 47 & 2 & 15.67 & 0.67 \\ _Chemistry and Tec._ & & & & & \\ \hline \end{tabular}
\end{table}
Table 1: Statistical analysis of journals in the LBAs research.  
Figure 4: Science mapping of publication sources.  
_Cement and Concrete Composites_ presents a relatively low number of publications but expressive average normalized citations. Thus, the high number of annual citations from _Cement and Concrete Composites_ indicates its contribution to LBAs research. In addition, Table 1 shows that _Cement and Concrete Research_ has the highest total link strength. The total link strength is an indicator of the correlation network of journals. _ACI Materials Journal_ has a total link strength of 0, so it is not presented in the science mapping of publication sources (Figure 4).  
Scientific journals with different categories publish about LBAs. As a result, scientific journals on engineering, environmental engineering, agricultural and biological sciences, materials engineering, chemical engineering, chemistry, and materials science were identified. The multidisciplinary of LBAs research has a notable impact on the studies found in the literature and will be discussed later.