Hydraulic Lime NHL 3.5 Intelligence
Moderately hydraulic lime for building mortars and restoration work with 3.5 N/mm² strength.
Overview
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Live value: $12/25kg bag · Range: $12–$28
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About
Hydraulic lime NHL 3.5 is a naturally hydraulic building lime produced by burning limestone containing 15-20% clay and siliceous materials at high temperatures. The 'NHL 3.5' designation indicates its compressive strength of 3.5 N/mm². This moderately hydraulic lime sets underwater and develops strength through both carbonation and hydraulic reaction. Sourced from specific limestone quarries with optimal clay content, it's processed through controlled calcination and careful grinding. Primary uses include historic building restoration, lime mortars, renders, and pointing work where moderate strength and flexibility are required. Key properties include breathability, self-healing through autogenous healing, moderate set time, and compatibility with traditional masonry. Makers and contractors buy NHL 3.5 for projects requiring stronger lime mortars than NHL 2 but more workable than NHL 5, particularly for exposed masonry, chimneys, and structural repair work in heritage conservation projects.
FAQ
What is Hydraulic Lime NHL 3.5 primarily used for?+
Moderately hydraulic lime for building mortars and restoration work with 3.5 N/mm² strength.
How is pricing tracked?+
Pricing is tracked from live listings and normalized into a $12–$28 intelligence range.
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Review active compliance records, safety guidance, and any jurisdiction-specific case or regulation updates.
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Prices
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Approximate conversions · mid-price · 25kg bag