Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 Requirements
6 Testing
7 Evaluation of conformity
8 Designation, supply marking and labelling
Annex A (normative) - Source materials considered in
        the development of EN 13055 and their status
        in respect of the scope of the standard
Annex B (normative) - Standards covering other
        applications of lightweight aggregates
Annex C (normative) - Determination of bulk crushing
        resistance
Annex D (informative) - Guidance on how to convert
        quantities by mass to quantities by volume
Annex E (informative) - Guidance on the effects of
        some chemical constituents of lightweight
        aggregates on the durability of concrete,
        mortar and grout in which they are
        incorporated
Annex F (informative) - Factory production control
Annex ZA (informative) - Clauses of this European
         Standard addressing the provisions of
         the EU Construction Products Directive