Mortar Mixes

[Clive 2000]

Hi everyone

 

Can someone out there put me straight, Iv'e been looking at some videos on the internet about making a mortar mix, all with conflicting answers, ie. ratio mix of 1 cement to 3 parts sand right up, 1 of cement to 6 parts sand.

 

What I'm having to do is take some bricks out which are just below the damp proof course as the face of the brick has perished, turning them around so they are still a resonable match to the others.

Iv'e also noticed some of the mortar joints above the damp proof course, the mortar can more or less be raked out with my finger nails ie very sandy, whats the most likely cause of this and whats the best mortar mix for pointing up above the damp course.

 

Thanks to anyone who can help

[Carrerahill]

They are in all honesty all correct, however about 1:4 is about the normal mix. 

 

1:3 would be severe environment with 1:8 being passive.

 

I usually go about 1:4.5.  

 

 

[JohnMo]

Have a read

https://www.thomasarmstrongconcreteblocks.co.uk/mortar-mix.html

[Onoff]

19 hours ago, Clive 2000 said:

Hi everyone

 

Can someone out there put me straight, Iv'e been looking at some videos on the internet about making a mortar mix, all with conflicting answers, ie. ratio mix of 1 cement to 3 parts sand right up, 1 of cement to 6 parts sand.

 

What I'm having to do is take some bricks out which are just below the damp proof course as the face of the brick has perished, turning them around so they are still a resonable match to the others.

Iv'e also noticed some of the mortar joints above the damp proof course, the mortar can more or less be raked out with my finger nails ie very sandy, whats the most likely cause of this and whats the best mortar mix for pointing up above the damp course.

 

Thanks to anyone who can help

 

It's not lime mortar existing is it?