What is the difference between M7.5 ordinary masonry mortar and Mb7.5 specialized mortar

The difference between M7.5 ordinary masonry mortar and Mb7.5 special mortar: different meanings, different composition materials, different body types.

I, meaning different

1, M7.5 masonry mortar: indicates the compressive strength grade of cement mortar.

2, Mb7.5 special mortar: on behalf of small hollow blocks of masonry mortar strength grade 75

Two, the composition of different materials

1, M7.5 masonry mortar: . Sintered ordinary bricks, sintered porous bricks, autoclaved gray sand ordinary bricks and autoclaved fly ash ordinary brick masonry using ordinary mortar strength grade: M15, M10, M7.5, M5 and M2.5

2, Mb7.5 special mortar: concrete ordinary bricks, ? Concrete porous bricks, single row of holes in concrete blocks and gangue concrete masonry using mortar strength level: Mb20, Mb15, Mb10, Mb7.5 and Mb5

Three, the body type is different

1, M7.5 masonry mortar: one is a mortar

2, Mb7.5 special mortar: small hollow block

References

Baidu Encyclopedia-Mortar Strength Grade

Baidu Encyclopedia-Concrete Small Hollow Blocks