BS 8500 (2023)

Question 1

How does BS EN 206 and BS8500 relate to each other?

Answer 1

BS EN 206 is a European standard. BS 8500 provides additional provision specific to UK

Question 2

What are the key differences between 2015 version and 2023 version of BS8500

Answer 2

1. 2015 had option of one SCM. 2023 has multi component SCM
2. Characteristic strength does not any more govern resistance to XD and XS class. reducing the risk of low clinker cements being ruled out.
3. Characteristic strength is the limiting factor for XC. Depth of carbonation and strength were observed to have a strong correlation.

Question 3

Explain this notation CEM II/C-M (S-L)

Answer 3

CEM II - Portland composite cement
C - Proportion of CEM. C stands for lowest.
M - Shows that its multicomponent cement
S - Slag in high proportion because its stated first
L - Limestone lower in proportion because stated last

Question 4

List family of common cements

Answer 4

1. CEM I - Portland cement
2. CEM II - Portland - Composite cement
3. CEM III - Blast furnace cement
4. CEM IV - Pozzolanic cement
5. CEM V - Composite cement

Question 5

How are sulphate attack resistance categorised under the new code

Answer 5

Categorised between A-G. A resulting in lowest resistance

Question 6

How are chloride ingress resistance categorised under the new code

Answer 6

Categorised between 1-4. 1 providing the lowest resistance