Types of Cement

Masonry Cement

Masonry cements are hydraulic cements designed for use in mortar for masonry construction.

The typical requirements for a good mortar cement are:-

High water retention
Excellent plasticity
Excellent cohesiveness in fresh stage
Better workability
Low shrinkage
Limited water permeability

Masonry cement satisfies the above requirements. However, it has low early and late strengths.

They consist of a mixture of Portland cement or blended hydraulic cement and plasticizing materials (such as limestone or hydrated or hydraulic lime), together with other materials (like mineral additives and air entraining agents) introduced to enhance one or more properties such as setting time, workability, water retention and durability.

These components are proportioned and packed at cement plant under controlled conditions to ensure uniformity of performance. Workability, strength, and color of masonry cements and mortar cements stay at a high level of uniformity because of stricter manufacturing controls.

Masonry cements are also used in Portland-cement based plaster or stucco construction . Masonry cement should not be used for making concrete.

ASTM C 91 on masonry cement is used to make both mortar and plaster (stucco). C 91 has Types N, S, and M.