**5. Conclusions**

This paper aims to develop a new concrete hollow block with RCA for the structural element. A laboratory test was carried out to investigate the seismic performance of RCHB masonry walls. Based on the experiment data and discussion, the following conclusions can be drawn:

1. In this paper, waste concrete of construction waste is re-utilized as the resource in manufacturing RCHB. This block can be used in masonry structures with seismic requirements according to the

Chinese standard. The test results indicate that this RCHB masonry structure complies with the seismic requirement through rational design. The above work provides a new solution for the recycling of construction waste;


#### **Author Contributions:** Writing—review and editing, C.L. and X.N.; Resources, F.Z., Z.Q. and G.B.

**Funding:** This research was funded by [the Natural Science Foundation of China] gran<sup>t</sup> number [51878546], [the Shaanxi Province Innovative Talent Promotion Plan Project] gran<sup>t</sup> number [2018KJXX-056], [the Shaanxi Provincial Science and Technology Innovation Planning Project] gran<sup>t</sup> number [2016KTZDSF04-02-01], the Shaanxi Provincial Key Research and Development Program] gran<sup>t</sup> number [2018ZDCXL-SF-03-03-02], [the Shaanxi Provincial Key Technology and Science Innovation Team Program] gran<sup>t</sup> number [2016-KCT31], [the Shaanxi Science and Technology Innovation Base] gran<sup>t</sup> number [2017KTPT-19].

**Acknowledgments:** The support from the following fund projects is highly acknowledged: (1) the National Natural Science Foundation of China (51878546); (2) the Shaanxi Provincial Innovative Talents Promotion Program (2018KJXX-056); (3) the Shaanxi Provincial Science and Technology Innovation Planning Project (2016KTZDSF04-02-01); (4) the Shaanxi Provincial Key Research and Development Project (2018ZDCXL-SF-03-03-02); (5) the Shaanxi Provincial Key Technology and Science Innovation Team Program (2016-KCT31); and (6) the Shaanxi Science and technology innovation base "technology innovation Service Platform of solid waste resources energy-saving wall materials science" (2017KTPT-19).

**Conflicts of Interest:** The authors declare no conflict of interest.
