What does Type S mean on mortar?
Type S: masonry foundations, manholes, retaining walls, sewers, and brick patios and brick pavements. Type S Mortar is the ideal product for masonry at or below grade. This type of mortar performs well while fighting soil pressure and wind, or while under seismic conditions.
What is Type S lime good for?
Enhances water retention – Smaller particles tend to attract and adhere to water molecules. This enhances workability. Creates a mechanical lock – The fine particle size of the Type S hydrated lime allows the mortar to penetrate deep into the masonry unit. More intimate contact with the unit enhances bond strength.
Does Type S mortar have lime in it?
Compressive strength is the capacity of a material or structure to withstand loads that are likely to reduce size. Type S mortar mix, which contains two parts portland cement, one part hydrated lime and nine parts sand, has a compressive strength of at least 1,800 pounds per square inch (psi).
What is the difference between hydrated lime and Type S lime?
Type S must meet a water retention value of 85%, while Type N hydrate lime must have a water retention value of 75%. No distinction is made based on the nature and source of limestone.
What is Masons hydrated lime used for?
The dominant use of Type S hydrated lime is for masonry mortar and exterior render and stucco. ASTM C 270, which is the cornerstone standard specification for mortar, allows Type S or SA (air- entrained) hydrated lime.
Why hydraulic lime is not used in plastering?
Hydraulic lime plaster is not as hard as cement plaster. When the plaster dries, the pH drops to about 8.6. Non-hydraulic lime plaster requires moisture to set and prevents it from drying for several days.
What is the difference between lime mortar and lime plaster?
The principal difference between a lime mortar and a lime plaster or render is one of consistency. Whilst lime mortar is predominantly a building material, used to bind together masonry, lime plasters and renders need to be spreadable and may therefore contain more water and a finer aggregate.
