Civil Engineering Association

BS 8204 Screeds, bases and in situ floorings.

BS 8204-1:2003 Screeds, bases and in situ floorings. Concrete bases and cementitious levelling screeds to receive floorings. Code of practice

BS 8204-1:2003+Amendment 1:2009 Screeds, bases and in situ floorings. Concrete bases and cementitious levelling screeds to receive floorings. Code of practice

BS 8204-1 gives recommendations for the design and laying of concrete bases and cementitious levelling screeds to receive in situ floorings. It also gives recommendations for constituent materials, design, work on site, inspection and testing of concrete bases that are to receive in situ wearing screeds.

BS 8204-1 covers the following types of materials:

a) Concrete (see BS 8204-2)
b) Polymer modified cement (see BS 8204-3)
c) Terrazzo (see BS 8204-4)
d) Mastic asphalt (see BS 8204-5)
e) Synthetic resin (see BS 8204-6)
f) Magnesium oxychloride
g) Pumpable self-smoothing screeds (see BS 8204-7)

BS 8204-1includes information on bases and levelling screeds that are to receive flexible floor coverings such as:
h) Textiles
i) Linoleum
j) Polyvinyl chloride
k) Rubber
l) Cork

It also includes rigid floorings such as:
m) Wood block and strip
n) Laminate floor coverings
o) Ceramic tiles
p) Natural stone.

BS 8204-1 applies to ground-supported and suspended concrete floor bases. It includes the use of concrete and levelling screeds made with lightweight aggregates conforming to BS EN 13055-1. Recommended methods for the assessment of levels and surface regularity and for the determination of in situ crushing resistance (soundness) are also given in this standard.

BS 8204-1 does not provide guidance on the structural design or related construction of concrete ground-supported floors or suspended slabs. Information on these aspects is given in BS 8110-1. The specification of concrete for base slabs is given in BS 8500-2. The recommendations in this code of practice relate to those other aspects of design and construction of concrete slabs that affect the performance of the overlying levelling or wearing screed.

This standard has been amended to include updates made to other cement and aggregate standards.

Contents of BS 8204-1:
Foreword
Scope
Normative references
Terms and definitions
Exchange of information and time schedule
Materials
Design considerations
Work on site
Inspection and testing of bases and levelling screeds
Annex A (normative) Recommendations for the use of lightweight aggregates in concrete bases and levelling screeds
Annex B (informative) Guidance for specifying fine aggregates for cementitious levelling screeds: comparison of the grading and fines content of aggregates in BS EN 13139 with established UK practice
Annex C (normative) Methods for the assessment of levels and surface regularity
Annex D (normative) Method for the determination of in situ crushing resistance of bonded and unbonded levelling screeds
Annex E (normative) Determination of in situ crushing resistance of floating levelling screeds
Annex F (normative) Curing recommendations for different cement types
Bibliography
Figures
Tables

BS 8204-2:2003 Screeds, bases and in situ floorings. Concrete wearing surfaces. Code of practice
BS 8204-2:2003+Amendment 1:2009 Screeds, bases and in situ floorings. Concrete wearing surfaces. Code of practice

BS 8204-2 gives recommendations for constituent materials, design, work on site, inspection and testing of in situ concrete direct finished base slabs. It applies to concrete as the wearing surface and wearing screeds (formerly known as high strength concrete toppings and granolithic toppings). It applies to both ground-supported floors and suspended floors.

BS 8204-2 does not provide guidance on the structural design of ground-supported or suspended floors. Information on this aspect is given in BS 8110-1.

The recommendations in this code of practice relate to those other aspects of the design of concrete floors that affect the performance of their wearing surfaces.

This standard has been amended to include updates made to other cement and aggregate standards.

Contents of BS 8204-2:
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Exchange of information and time schedule
5 Materials
6 Design considerations: performance requirements
7 Design considerations: general
8 Design considerations: direct finished slabs
9 Design considerations: wearing screeds
10 Work on site: general
11 Work on site: wearing screeds
12 Inspection and testing of wearing surfaces
13 Maintenance
Annex A (normative) Methods for assessing levels and surface regularity
Annex B (normative) Curing recommendations for different cement types
Bibliography
List of figures
List of tables

BS 8204-3:2004 Screeds, bases and in situ floorings. Polymer modified cementitious levelling screeds and wearing screeds. Code of practice
BS 8204-3:2004+Amendment 1:2009 Screeds, bases and in situ floorings. Polymer modified cementitious levelling screeds and wearing screeds. Code of practice

BS 8204-3 gives recommendations for the design and installation of trowel finished polymer modified cementitious levelling screeds and wearing screeds. It applies where the proportion of polymer solids based on the mass of dry cement is at least 4 %, as bonded screeds applied to direct finished concrete slabs, fine concrete screeds and to existing concrete floors within buildings.

BS 8204-3 does not apply to unbonded screeds, floating screeds, pumpable self-smoothing screeds, or those laid monolithically. It also does not apply to two-component aqueous thermosetting polymer dispersions.

This standard has been amended to include updates made to other cement and aggregate standards.

Contents of BS 8204-3:
Foreword
Scope
Normative references
Terms and definitions
Exchange of information and time schedule
Materials
Design
Preparation of concrete bases and fine concrete screeds
Work on site
Health and safety precautions
Inspection and testing of the screed
Maintenance
Bibliography
List of figures
List of tables

BS 8204-4:2004 Screeds, bases and in situ floorings. Cementitious terrazo wearing surfaces. Code of practice
This part of BS 8204 gives recommendations for the materials, design, work on site, inspection and testing,
and cleaning and maintenance for in situ cementitious terrazzo flooring. It is intended for terrazzo
contractors, specifiers, builders, designers and main contractors. It gives recommendations for in situ
terrazzo flooring applied as a wearing surface on a concrete base or screed.
NOTE This part of BS 8204 is intended to be read in conjunction with BS 8204-1.

:JC_cheers:

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Screeds, bases and in situ floorings – Part 6: Synthetic resin floorings – Code of practice

This part of BS 8204 gives recommendations for the design and installation of in situ synthetic resin flooring, based on liquid synthetic resin binders in which curing takes place by chemical reaction of the resin components, used internally in buildings. The synthetic resin floorings are bonded to direct finished concrete slabs, polymer-modified cementitious or fine concrete screeds and to existing concrete floors. Annex A gives recommendations for the design and installation of resin terrazzo flooring. Synthetic resin floorings applied to other materials such as timber or metal are not covered by this code of practice. The installation of resilient sports surfacings based on synthetic resins is not covered by this code of practice.

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BS 8204 Part 1:7

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Private Note:

BS 8204 Screeds, bases and in situ floorings.

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