1. Studies on the weathering of natural stone – 1987 -2018
Tim Yates
BRE

2. Exposure Trials of Portland Limestone
Spatial variation
Between countries
Urban versus rural
Changes with time – 1987 – 2018

3. Changes with time – 1987 – 2018 -3.94 -6.81 -7.42 -8.57 -10.60 -11.76
Country
Name µm µm µm µm µm µm µm µm
Unsheltered
01 Czech Rep
Prague
-22.9 -6
-5.33
-7.75
-4.5
-7.24
-3.94
-6.81
03 Czech Rep
Kopisty
-19.4
-7.2
-7.91
-11.8
-11.11
-9.91
-7.42
-8.57
10 Germany
Bottrop
-17.4
-11.7
-11.88
-15.2
-8.56
-10.93
-10.60
-11.76
13 Italy
Rome
-10.9
-6.37
-8.87
-5.44
-4.76
-8.08
14 Italy
Casaccia
-6.7
-6.71
-9.85
-5.93
-8.91
-7.39
-7.69
15 Italy
Milan
-19.5 -9
-8.74
-15.09
-11.63
-9.54
-8.30
-8.51
16 Italy
Venice
-8.8
-9.6
-7.17
-9.58
-6.98
-6.11
-4.68
-7.12
21 Norway
Oslo
-8.4
-7.31
-10.67
-4.32
-4.65
-7.81
-9.51
23 Norway
Birkenes
-17
-7.5
-7.66
-14.65
-11.91
-13.33
-12.70 -
24 Sweden
Stockholm South
-14
-8.1
-7.29
-12.78
-9.57
-10.98
-9.16
-10.92
26 Sweden
Aspvreten
-6.8
-3.6
-4.3
-7.79
-6.87
-8.25
-6.07
-7.27
31 Spain
Madrid
-13.3
-3.3
-3.91
-8.11
-2.64
-3.17
33 Spain
Toledo
-6.2
-5.82
-11.48
-7.49
-4.77
-12.51

4. Between countries

5. Rural versus urban

6. All sites – 2014- 2018 Name Period 1987-88 1997-98 2002-03 2005-06
Mean
Prague 1
-22.90
-6.00
-5.33
-7.75
-4.5
-7.24
-3.94
-6.81
-5.94
Kopisty 3
-19.40
-7.20
-7.91
-11.80
-11.11
-9.91
-7.42
-8.57
-9.13
Bottrop 10
-17.40
-11.70
-11.88
-15.20
-8.56
-10.93
-10.60
-11.76
-11.52
Rome 13
-10.90
-6.37
-8.87
-5.44
-4.76
-8.08
-6.75
Casaccia 14
-6.70
-6.71
-9.85
-5.93
-8.91
-7.39
-7.69
-7.50
Milan 15
-19.50
-9.00
-8.74
-15.09
-11.63
-9.54
-8.30
-8.51
-10.12
Venice 16
-8.80
-9.60
-7.17
-9.58
-6.98
-6.11
-4.68
-7.12
-7.32
Oslo 21
-8.40
-7.31
-10.67
-4.32
-4.65
-7.81
-9.51
-7.52
Birkenes 23
-17.00
-7.66
-14.65
-11.91
-13.33
-12.70 -
-11.29
Stockholm 24
-14.00
-8.10
-7.29
-12.78
-9.57
-10.98
-9.16
-10.92
-9.83
Aspvreten 26
-6.80
-3.60
-4.30
-7.79
-6.87
-8.25
-6.07
-7.27
-6.31
Madrid 31
-13.30
-3.30
-3.91
-8.11
-2.64
-3.17
-5.12
Toledo 33
-6.20
-5.82
-11.48
-7.49
-4.77
-12.51
-8.05
Lahemaa 35
-9.90
-5.40
-10.65
-8.33
-8.89
-8.44
Paris 40
-8.70
-8.14
-6.77
-4.12
-7.22
-6.55
Berlin 41
-2.00
-8.59
-2.23
-3.00
-2.88
5.75
-5.38
Svanvik 44
-6.60
-9.11
-9.79
-12.79
-9.89
-6.82
-1.71
Chaumont 45
-9.30
-9.04
-14.30
-7.06
-11.98
-5.71
-13.39
-10.11
Katowice 50
-14.58
-13.74
-9.35
-9.98
Athens 51
-3.97
-6.38
Vienna 53
-10.03
-8.65
Hämeenlinna 57
-9.08
-9.55
New Haven 58
Zilina 59
-7.13
-8.17
-7.65
Split 60
-9.95
Zagreb 61
-10.69