1. ABNT (2005a). NBR 13280: Mortar for laying and coating walls and ceilings - Determination of bulk density in the hardened state.Rio de Janeiro.
2. ABNT (2005b). NBR 13278: Mortar for laying and coating walls and ceilings - Determination of bulk density and incorporated air content. Rio de Janeiro.
3. ABNT (2005c). NBR 13279: Mortar for laying and coating walls and ceilings - Determination of tensile strength in flexion and compression. Rio de Janeiro.
4. ABNT (2008). NBR 15630: Mortar for laying and coating walls and ceilings - Determination of the dynamic modulus of elasticity through the propagation of an ultrasonic wave. Rio de Janeiro.
5. ABNT (2016a). NBR 16541: Mortar for laying and coating walls and ceilings - Preparation of the mixture for testing. Rio de Janeiro.