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Technical Data Sheet
Broadway Limestone
Broadway Quarry, Broadway, Worcester
Compiled September 1997

This data sheet was compiled by the Building Research Establishment (BRE). Where possible, data collected in earlier surveys has been used to help interpret the test results. The data sheet was compiled in September 1997 using the results of tests carried out to the proposed European Standards. The work was carried out by BRE as part of a Partners in Technology Programme funded by the Department of the Environment and Smith & Sons (Bletchington) Ltd and does not represent an endorsement of the stone by BRE. 

General
The quarry is located on the A44 at the top of Broadway Hill, 1 mile south east of Broadway. The quarry has been in production for morethan 40 years. The stone occurs in distinctive colours, known as light and dark cream, and as white paving stone. 

Petrography 
The stone is an oolithic limestone and the beds arepart of the Jurassic Great Oolite Series. It contains fine ooliths and veins that give it the distinctive colour and texture. 

Expected Durability and Performance 
It is important that the results from the sodium sulphate crystallisation tests are not viewed in isolation. They should be considered with the results from the porosity and water absorption tests and the performance of the stone in existing buildings. Stone from the Cotswold region is traditionally used as building stone in the region and increasingly in many other towns and cities in the UK. The high water absorption and porosity indicate a very open stone that will have good resistance to weathering. The sodium sulphate crystallisation result also indicates that the stone will have good resistance to salt damage and that it will perform well in all but the most exposed locations where it may it may require some extra protection or careful design and detailing to shed water. 

Test Results - Broadway Limestone - Dark Cream
 
Safety in Use
Slip Resistance (Note 1) 
Not determined
Values > 40 are considered safe 
Abrasion Resistance(Note 1) 
35.2
Values <23.0 are considered suitable for use in heavily trafficked areas 
Strength under load
1) Compression(Note 2) 
18.4 MPa
Loaded perpendicular to the bedding - ambient humidity 
2) Bending (Note 1) 
4.7 MPa
Loaded perpendicular to the bedding - ambient humidity 
Porosity and Water Absorption 
1) Porosity (Note 3) 
26.4% 
2) Saturation Coefficient (Note 3) 
0.70
3) Water Absorption
9.6% (by wt) 
4) Bulk specific gravity 
1997 kg/m3 
Resistance to Frost 
Freeze/Thaw Test (Note 1)  Not determined  
Resistance to Salt
Sodium Sulphate Crystallisation Test (Note 3) 
Mean: 20.5% wt loss

(Test methods Note 1 = prEn1341, Note 2 = prEN 1342, Note 3 = prEn 1341 /BRE 141, Note 4 = BRE 141)
Tests were carried out at BRE in 1997.

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