SMET NHL 3.5
SMET NHL 3.5 is a high-quality, pure Natural Hydraulic Lime binder, produced under ISO 9001 and ISO 140014 management systems to EN 459-1. The moderate hydraulic strength development of SMET NHL 3.5 makes it suitable for producing lime mortars for masonry work, rendering, plastering base coats and limecrete.
A moderately hydraulic lime binder for the production of mortars particularly suited for ecological new builds, restoration and preservation work. The product’s special composition allows the mortar product to breathe and also permits constant hygrometric exchange between the substrate and the environment.
Benefits of SMET NHL 3.5 Binder
• Historical, gypsum and cement-free NHL
• Produces highly breathable mortars
• Highly sulphate resistant
• Low-stress hardening process
• Excellent subsequent hardening
• High water retention and elasticity in produced mortars
• Excellent bond properties to masonry
• EN 459-1
Production Of Mortars For Masonry
Production Of Mortars For Rendering
SMET NHL 3.5 must be mixed with clean, well-graded sands and clean water without additives. Do not mix or apply if the temperature is below +5ºC or over 30ºC. This product must not be mixed with gypsum or be applied to gypsum-based backgrounds. Avoid over-mixing, as this can adversely affect performance and strength. Material that has set must not be re-mixed. For interior applications, care must be taken when using heating systems. High or rapidly changing temperatures may affect the hydraulic setting reaction of the mortar/render and cause cracking and/or adhesion problems. Delay the implementation of heating systems for as long as possible and heat up interiors gradually. Other unfavourable conditions, such as overly wet backgrounds, low background temperatures, and low air temperatures can delay setting. During and after application, protect the mortar/render from adverse weather conditions, such as direct sunlight, strong winds, rain, and frost.
Technical Details for SMET NHL 3.5 Binder
|Unit||Average values*||Conformity to Standard|
|Fineness at 90 µ||%||4||–||15|
|Fineness at 200 µ||%||0.7||–||2|
|Beginning of set||min||200||60||–|
|End of set||min||290||–||1800|
|Mechanical strength at 28 days||MPa||4.25||3.5||10|
|Free lime content||%||26.8||25||–|
Packaging: Available in 25 kg bags.