BS 8204-1:1999

Committees responsible
      Foreword
1 Scope
2 Normative references
3 Definitions
4 Exchange of information and time schedule
5 Materials
6 Design considerations
7 Work on site
8 Inspection and testing of bases and levelling
      screeds
Annex A (informative) Recommendations for the use of
                      lightweight aggregates in
                      concrete bases and levelling
                      screeds
Annex B (normative) Methods for the assessment of
                    levels and surface regularity
Annex C (normative) Method for the determination of
                    in-situ crushing resistance of
                    bonded and unbonded levelling
                    screeds
Bibliography
Figure 1 - Illustration of layers in a ground-
           supported concrete floor
Figure 2 - Illustration of layers in a suspended
           concrete floor
Figure B.1 - Stainless steel slip gauges for
             checking surface regularity
Figure C.1 - BRE screed tester
Table 1 - Grading limits of sand for levelling
          screeds
Table 2 - Admixtures
Table 3 - Concrete strength for base slabs
Table 4 - Choice of in-situ resistance category
          for levelling screeds
Table 5 - Acceptance limits for in-situ crushing
          resistance test (Annex C)
Table 6 - Classification of surface regularity of
          direct finished base slab or levelling
          screed

Provides recommendations regarding materials, design, work on site, inspection and testing for concrete bases which are to receive in-situ wearing screeds, bases and levelling screeds for flexible and rigid floor coverings.