Prismatic PM specimens were tested in three-point bending up to failure as specified by RILEM CPT PCM-8 test method. One of the two leftover parts of each broken specimen in bending was tested afterwards in compression following the procedure described in UNE 83821:1992 test standard. The flexural and compression test methods conditions were similar to those specified in EN 196-1:2005, which is the test standard commonly used for the determination of strength of cement mortars.