Should I use hydraulic or non-hydraulic lime mortar?
Should I use hydraulic or non-hydraulic lime mortar?
Non-hydraulic lime is softer and sets much more slowly. The carbonation process is very slow and the material remains soft and flexible. This of course, can be extremely advantageous if that’s what is required. The hydraulic lime is available in degrees of strength, is faster setting and more durable.
What is the difference between lime and hydraulic lime?
Hydraulic limes (so called because they set under water) are made in the same way as non-hydraulic lime but using different limestone….Comparison table:
| Hydraulic Lime | Non-hydraulic Lime |
|---|---|
| Faster setting lime | Slower setting time |
| Stronger/harder | Weaker/softer |
| Less permeable | More permeable |
What are the different types of lime mortar?
There are a few types of lime mortar available.
- Hydraulic Lime Mortar (Water Lime, Hydraulic) Made with Natural Hydraulic Lime (NHL).
- Non-Hydraulic Lime Mortar (Air Lime, Non-Hydraulic) Made with non-hydraulic lime, commonly known as lime putty.
- Hot Mixed Lime Mortar (Air Lime, Non-Hydraulic)
Is non-hydraulic lime the same as hydrated lime?
Non-hydraulic lime (CL or DL 70-90) is sold as either hydrated lime or putty lime; they set and harden through drying out and absorbing carbon dioxide from the air. Hydrated lime simply means that a controlled amount of water is added to quicklime to make a powder that is more stable and safe to handle.
Can you mix hydraulic lime with cement?
Mixing Hydraulic Lime. A conventional cement mixer can be used to mix hydraulic lime plasters.
Is non hydraulic lime the same as hydrated lime?
What is the difference between hydraulic and non hydraulic cement?
The major difference between hydraulic and non-hydraulic cement is the hardening process. Hydraulic cement can harden while in contact with water. Non-hydraulic cement needs dry conditions to strengthen.
Can you mix lime mortar in a cement mixer?
A conventional cement mixer can be used to mix hydraulic lime plasters. However, for larger projects a roller-pan or paddle-mixer is preferable. Lime mortars mixed in drum mixers are prone to balling.
What are the three types of lime?
Different types of limes used in construction are Quick Lime, Slaked Lime, Fat Lime and Hydraulic Lime….
- Quick Lime. Ad.
- Slaked Lime. Slaked lime is obtained by the process of slaking, where quick lime is combined with water.
- Fat Lime.
- Hydraulic Lime.
What is the difference between hydraulic mortar and non hydraulic mortar?
Non-Hydraulic Lime Mortars are also referred to as Hot Lime Mortars and are perfect for pointing and building with softer stones and bricks. The softer mortar has a higher porosity, and better flexibility than hydraulic mortar, as it relies solely on natural carbonation.
What is the difference between hydraulic and non-hydraulic lime?
Non-hydraulic lime is made from a pure limestone, pure calcium carbonate, and tends to be in the form of a putty. Non-hydraulic lime sets by carbonation (re-absorbing carbon dioxide from the air). It is softer and sets much more slowly than hydraulic lime and remains softer for longer as the carbonation process is very slow.
What is non-hydraulic lime putty?
Non Hydraulic Limes have various names such as Fat Lime, Lime Putty, Air Lime and set by carbonation. This causes a much slower set and the lime remains softer and more breathable. Our non-hydraulic lime putties are matured on site and used to produce our Medium, Coarse and Fine Stuff plasters and mortars.
Can you turn ready mixed lime mortar into hydraulic mortar?
These come wet as ready mixed lime mortars, all you need to do is rework them and they are ready to use. You can also turn these into a hydraulic mortar by the addition of a pozzolan. This then turns the mortar to an FHL (Formulated Hydraulic Lime) as oppose to an NHL (Natural Hydraulic Lime).
