RJ1.08 CHALK LIME PUTTY |
PRODUCT DATA SHEET |
DESCRIPTION: |
A mortar grade lime putty slaked from Singleton Birch chalk quarried
and 'burnt' in Lincolnshire at c.1000ºC. This lime has a very low silica
content and this putty therefore may have very weak hydraulic properties.
The putty is matured for at least 6 months. |
APPEARANCE: |
Thick, creamy-white dispersion containing a small proportion of <3mm flint and un-burnt chalk particles. |
USES: |
To be mixed by volume with sands, stone-dusts and aggregates normally
at 1: 2½ or 1:3 (depending on application) to produce lime putty bedding
and pointing mortars and internal basecoat plasters. Superfine grade Chalk
lime putty is used for fine finish plasters. Pozzolans (RJ7.01)
are normally added on site for external renders, and work in exposed locations.
|
AVAILABILITY: |
6 months and 12 months Mature. Both ex Stock. |
SHELF LIFE: |
Matures and improves with age when
kept in sealed containers. This putty will stiffen during storage, but can be plasticised without the addition of water by thorough mixing. Protect from frost. |
PACKAGES: |
15 litre (c.20kgs) and 20 litre (c.27kgs) polyethylene tubs. |
HEALTH & SAFETY |
Alkali pH 13. Eyes, open sores and cuts, and skin must be protected.
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OBSERVATIONS: |
Tradesmen familiar with the use of lime, and with experience of its successful use should be employed. Accurate volumetric site mixing is essential. Lime putty mortars do not perform as gypsum plaster, Portland cement, or hydraulic lime. Non-hydraulic lime sets only by reaction with atmospheric carbon dioxide in the presence of moisture. This 'carbonation' is a slow process and control of the drying and curing process by 'tending' and protecting is crucial to success and long term performance. Do not use in temperatures of 5ºC and falling. |