Novel grout material comprised of calcium phosphate compounds: In vitro evaluation of crystal precipitation and strength reinforcement

► The feasibility of a new grout using calcium phosphate compound (CPC) was examined. ► The volume of CPC precipitation in the reaction mixture increased with pH. ► The unconfined compressive strength of a test piece cemented by CPC reached 63.5 kPa. ► The results showed the potential for using CPC as chemical grout and biogrout.