DIY Forum

 

Ultimate Handyman Ultimate Handyman Ultimate Handyman Ultimate HandymanUltimate Handyman on Pinterest

 

DIY Forum/Home improvement advice forum

 

 

A-Z CONTENTS | DISCLAIMER | DIY VIDEO | HOME | SAFETY FIRST | FORUM RULES

It is currently Sat Nov 18, 2017 1:06 am
Visit Thermo worx


Time zone: Europe/London




 

 


Post new topic Reply to topic  [ 7 posts ] 
Author Message
PostPosted: Sat Nov 04, 2017 8:03 pm 
Offline
Newly registered Member

Joined: Fri Sep 08, 2017 12:37 pm
Posts: 41
Has thanked: 20 times
Been thanked: 1 times
I have done some research via the net for this enquiry, but so far it isn't really turning up any definitive answers. I have read that either too much or too little can effect the final strength of the concrete.

Can anyone advise to how much water should be mixed for a 1 cement to 4 ballast ratio?

Thanks :)


Share on FacebookShare on TwitterShare on DiggShare on DeliciousShare on Google+
Top
 Profile  
Reply with quote  
PostPosted: Sat Nov 04, 2017 8:35 pm 
Offline
Senior Member

Joined: Fri Sep 19, 2008 9:18 pm
Posts: 312
Has thanked: 8 times
Been thanked: 57 times
Difficult to give an amount because it depends a lot on how wet the ballast or sand is to start with.
Rule of thumb is that the mix needs enough water to make it workable, so for example you would need a wetter mix for bricklaying mortar than for laying a screed. More for a render mix than for pointing.
Too much water will weaken it, but you have to be able to work with it
What is the concrete for? 4/1 is quite a strong mix. More cement means more shrinkage cracking.


Top
 Profile  
Reply with quote  
PostPosted: Sat Nov 04, 2017 10:02 pm 
Offline
Newly registered Member

Joined: Fri Sep 08, 2017 12:37 pm
Posts: 41
Has thanked: 20 times
Been thanked: 1 times
stuart45 wrote:
Difficult to give an amount because it depends a lot on how wet the ballast or sand is to start with.
Rule of thumb is that the mix needs enough water to make it workable, so for example you would need a wetter mix for bricklaying mortar than for laying a screed. More for a render mix than for pointing.
Too much water will weaken it, but you have to be able to work with it
What is the concrete for? 4/1 is quite a strong mix. More cement means more shrinkage cracking.


I purchased Blue Circle 25 kg bags pf regular cement, the instructions on the back said a 1:4. I'm using it for concreting in fence posts. I made the mix rough, it was workable kinda like a dry bolognese sauce, claggy if you like. I hope it doesn't crack!!


Top
 Profile  
Reply with quote  
PostPosted: Sat Nov 04, 2017 10:17 pm 
Offline
Senior Member

Joined: Fri Sep 19, 2008 9:18 pm
Posts: 312
Has thanked: 8 times
Been thanked: 57 times
A few shrinkage cracks is not a problem for concreting in fence posts. It's more when doing something like a floor. Not a structural problem, more for looks, so movement joints are often used.


Top
 Profile  
Reply with quote  
PostPosted: Sat Nov 04, 2017 11:34 pm 
Offline
Senior Member
User avatar

Joined: Sun Aug 18, 2013 8:04 pm
Posts: 7509
Location: Fife
Has thanked: 941 times
Been thanked: 1737 times
Next time you do fence posts buy bags of postcrete instead of mixing up concrete.Quicker,cheaper,less labour intensive and you can work on the fence within an hour.



For this message the author steviejoiner74 has received thanks - 2: Ktuludays, The Z'eer
Top
 Profile  
Reply with quote  
PostPosted: Sat Nov 11, 2017 9:02 pm 
Offline
Newly registered Member

Joined: Fri Sep 08, 2017 12:37 pm
Posts: 41
Has thanked: 20 times
Been thanked: 1 times
steviejoiner74 wrote:
Next time you do fence posts buy bags of postcrete instead of mixing up concrete.Quicker,cheaper,less labour intensive and you can work on the fence within an hour.


I don't know about it being cheaper per kilo than self mixing concrete, but yes it WILL be a damn site easier and quicker! Next time...


Top
 Profile  
Reply with quote  
PostPosted: Fri Nov 17, 2017 2:31 pm 
Offline
Senior Member
User avatar

Joined: Thu Feb 27, 2014 5:09 pm
Posts: 559
Location: Essex
Has thanked: 131 times
Been thanked: 21 times
I done my fencing using postcrete, fairly wet mix, very workable. As long as the posts are 2 foot under ground level and the holes are decent then you'll be fine. 3 years on mine haven't moved.


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 7 posts ] 


Similar topics
   

Time zone: Europe/London


Who is online

Users browsing this forum: No registered users and 0 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Visit Hilti


 

 

 

News News Site map Site map SitemapIndex SitemapIndex RSS Feed RSS Feed Channel list Channel list
ultimatehandyman privacy policy

Contact

 

Powered by phpBB® Forum Software © phpBB Group

phpBB SEO