On 1st October 2000, the withdrawal of Regulation 25(1)C, the 'traditional use of exemption' provision in the Water Supply (Water Quality) Regulations 1989, came into effect for materials use in water supply pipes, service reservoirs and water towers.

Where in-situ concrete destined for use in public supply systems contains chemical admixtures, the new regulations comprise the following requirements:-

Water undertakers must specify structural design to BS8007:1987.

The chemical identity of the components of the admixture must be in accordance with the substances specified in the 'List of Authorised Cement Admixture Components'.

Water undertakers must obtain a declaration from the ready-mix concrete producer that the admixture does not contain chemicals other than those on the Authorised List.  Admixtures whose components are on the 'List' require no additional testing even for BS 6920 (Water Quality effect); in effect such admixtures have been pre-approved by virtue of inclusion of their components on the List.

 

Sika Concrete Admixtures in Compliance with the approved list of components in the Secretary of States List of Approved Products

 Plastiment 180  Sikament 170  Sikament 160
 Plastiment ECO-2  Sikament Boost Pak  SikaTard Pak
 Frioplast A1/ A2/ HC  Sika Retarder 50  Sikatard 930
 Sika ViscoCrete 20RM  Sika ViscoCrete 35RM  Sika ViscoCrete Wave
 Sika ViscoCrete Storm Sika ViscoCrete 30HE SikaPlast 10RM
SikaPlast 12RM  SikaPlast 15RM
 Sika AER PC
Sika AER 46  Sika 1+  Sikaproof L1
Sika ViscoFlow 2000 Sika ViscoFlow 3000 SikaPlast CRF 336

The above admixtures contain biocide/preservatives and agents, antifoam/air control agents confirmed as less than 1% in total.

Admixtures must be used within the manufacturers recommended dosage.

The chemical identity of admixtures is in accordance with the chemicals specified in Section 2.4 "List of Authorised Cement Admixture Components" of Appendix 1 of the "List of Approved Products and Processes" published by the DWI.

This Declaration confirms that the admixture does not contain chemicals other than those given in the List of Authorised Cement Admixture Components.