Fiona's Sheep formed from Womersleys Stone Repair
Thanks to stone mason Fiona for sending us a picture of the sheep she has constructed using Womersleys Stone Repair Material
This shows our pre mixed stone repair material that can be coloured. It contains well graded aggregate that is made up of Cheshire based silica sands, hard and soft limestone dusts and mica giving a carvable grading of 1mm to 5 microns. Hydraulic lime a small amount of white cement and admixes include cellulose as a water retainer and a corn syrup derivative as a wetting agent/shrink resistance admix.
The tests on hardened mortar (water addition at 18.7%) provide a Capillarity of 2.05 gr.cm2.min at 28 days, a water permeability of 0.25 ml.m.day and a Vapour permeability of 0.75 gr.m2.hour.mmHg
The Modulus of elasticity is a key component in the ability of the material to flex with the stress imposed during curing and later through thermal, physical movement etc. especially when applied thinly. The lower the number the greater the degree of flexibility. A cement lime sand mix of 1:1:6 ratio has a modulus of elasticity at 28 days of 16,200 compared with of the stone repair material at 7690 and lime putty/hot lime in a 1:3 ratio with sand of approximately 9,000.
The compressive strength of premixed repair material of 7.25 N/mm2 sufficiently high enough for the material to be robust enough for general conditions is considerably lower than most masonry units including soft-fired hand-made bricks that usually have a compressive strength around 8-14 N/mm2. Sandstones fall in the range 20-100N/mm2.