NHL 3.5
SKU:
$62.91
$62.91
per item
Natural Hydraulic Lime (NHL 3.5) Moderately Hydraulic lime is used for applications such as laying or repointing brick, stone and terra cotta units even in extreme freeze-thaw climate cycles. It can be used to make scratch, brown and finish coats of exterior stucco or interior plaster.
It has a significantly high "free lime" content that is responsible for self-healing mortars. The available free lime goes into solution during subsequent rains and then re-crystallizes across open fissures as is characteristic of historic pure lime mortars.
NHL maintains a hexagonal plate crystal structure which allows the plates to go in between each other for greater flexural ability. Portland cement has a needle-like crystal structure which is brittle and must incorporate many control joints to strategically control cracking.
NHL 3.5 is designated as a moderately hydraulic lime and will reach over 750 p.s.i. in six months when blended with 2-1/2 parts clean, sharp and well-graded sand. Most all above grade interior and exterior brickwork and stonework built with modern cement is recommended to be built using a Type N cement mortar, which reaches at least 750 p.s.i. in 28 days. Since modern designs call for structurally supporting steel or retaining walls made of concrete or concrete blocks laid with strong cement mortars, NHL mortars can be used for all of the veneer work, stucco and repointing where the old-world look, feel and properties of lime mortar is desired.
Comes as a 55 pound bag.
This is the natural, untinted version. Contact us to order a tinted or custom color.
Choose this product when you have your own sand to mix in.
About NHL
Natural Hydraulic Lime, although it is basically of the same chemical composition as Hydrated Lime, has its initial set with water, much like cement, and a second set by absorption of CO2. Being "hydraulic" allows for simplicity in many applications. Hydraulic Lime, like Hydrated Lime and cement requires some basic care such as minimizing the amount of mixing water, using good sand and tarping the work. The cost of labor when using NHL is therefore comparable to normal cementicious mortar and stucco installations which have been carried out correctly.
The hydraulicity, (which in true form is the ability to set with water and under water), for the St. Astier lime range is achieved only by the nature of the raw material. The St. Astier raw material is a naturally occurring hydraulic lime which is low-temperature fired. Nothing else is added to St. Astier NHL, therefore it is known as "Natural" Hydraulic Lime. It has known and measurable performance criteria which is both comforting and predictably dependable.
It has a significantly high "free lime" content that is responsible for self-healing mortars. The available free lime goes into solution during subsequent rains and then re-crystallizes across open fissures as is characteristic of historic pure lime mortars.
NHL maintains a hexagonal plate crystal structure which allows the plates to go in between each other for greater flexural ability. Portland cement has a needle-like crystal structure which is brittle and must incorporate many control joints to strategically control cracking.
NHL 3.5 is designated as a moderately hydraulic lime and will reach over 750 p.s.i. in six months when blended with 2-1/2 parts clean, sharp and well-graded sand. Most all above grade interior and exterior brickwork and stonework built with modern cement is recommended to be built using a Type N cement mortar, which reaches at least 750 p.s.i. in 28 days. Since modern designs call for structurally supporting steel or retaining walls made of concrete or concrete blocks laid with strong cement mortars, NHL mortars can be used for all of the veneer work, stucco and repointing where the old-world look, feel and properties of lime mortar is desired.
Comes as a 55 pound bag.
This is the natural, untinted version. Contact us to order a tinted or custom color.
Choose this product when you have your own sand to mix in.
About NHL
Natural Hydraulic Lime, although it is basically of the same chemical composition as Hydrated Lime, has its initial set with water, much like cement, and a second set by absorption of CO2. Being "hydraulic" allows for simplicity in many applications. Hydraulic Lime, like Hydrated Lime and cement requires some basic care such as minimizing the amount of mixing water, using good sand and tarping the work. The cost of labor when using NHL is therefore comparable to normal cementicious mortar and stucco installations which have been carried out correctly.
The hydraulicity, (which in true form is the ability to set with water and under water), for the St. Astier lime range is achieved only by the nature of the raw material. The St. Astier raw material is a naturally occurring hydraulic lime which is low-temperature fired. Nothing else is added to St. Astier NHL, therefore it is known as "Natural" Hydraulic Lime. It has known and measurable performance criteria which is both comforting and predictably dependable.