What is PAS 8820 - Alkali-activated cementitious material about?

PAS 8820 is applicable to alkali-activated cementitious material that has been developed to fill the gap and encourage the use of AACMs in the construction industry.

PAS 8820 is the to specify performance requirements of AACMs and the resulting concretes and to facilitate and encourage their use in construction projects, where appropriate.

PAS 8820 specifies the performance requirements for alkali-activated cementitious material comprising aluminosilicate main constituents and an alkali activator.

An AACM (including the activator) may contain Portland cement only at a content of less than 5% mass of binder solids and may contain subsidiary constituents not exceeding 25% of the mass of the cementitious material.

PAS 8820 also specifies a means of assessing concrete obtained through the use of such cementitious material for performance and durability and sets requirements for the alkali-activating component and the aluminosilicate powder component of these concretes.

PAS 8820 is for use by manufacturers of alkali-activated cementitious material, producers of prefabricated concrete elements containing alkali-activated cementitious material and producers of concrete containing alkali-activated cementitious materials which are to be precast, delivered ready-mixed or mixed in situ.

PAS 8820 is also of interest to designers and specifiers as it provides a means of assessing the suitability of AACM concrete mixtures for typical construction uses.

Note: PAS 8820 does not:

Set detailed requirements for the composition of the alkali-activated cementitious material
Specifically address applications for such materials as renders, screeds, mortars or repair materials, although it does not exclude the possibility that such materials could be used for such purposes
Cover the use of any material classified as hazardous waste.

Who is PAS 8820 - Alkali-activated cementitious material for?

PAS 8820 on alkali-activated cementitious material is useful for:

Manufacturers of alkali-activated cementitious material
Producers of prefabricated concrete elements containing alkali-activated cementitious material
Producers of concrete containing alkali-activated cementitious materials which is to be precast, delivered ready-mixed or mixed in situ
Designers and specifiers

Why should you use PAS 8820 - Alkali-activated cementitious material?

Alkali-activated cementitious material (AACM) is a substance consisting of an alkali activator and an AACM powder, or blend of such powders, with or without the inclusion of subsidiary constituents, with or without the incorporation of Portland cement, which under aqueous conditions, reacts to produce a hardened monolithic material.

PAS 8820 provide recommendations regarding the main constituents and the mixing protocol to be applied for correct utilization of the AACM.

AACMs is classified into strength classes in accordance with the physical and mechanical requirements given in PAS 8820.

PAS 8820 instructs you with the AACM used in the production of concrete that also involves concrete mixing, placement, curing and testing.

PAS 8820 establishes the intended use of specific testing and trials for AACM concrete.

Information, marking, handling and storage of the AACM materials are set out in PAS 8820 and also claims conformity of AACM, ready-mixed AACM concrete or precast AACM concrete.

Overall, PAS 8820 can help you produce concrete utilising alkali-activated cementitious material (AACM), which has performance advantages such as better chemical and fire resistance and lower permeability to water and aggressive chemicals.

As a result, AACM materials can be used in building construction, with the potential to provide low-carbon, high-performance alternatives to Portland cement binders, contributing to the built environment's sustainability.

PAS 8820:2016

Construction materials. Alkali-activated cementitious material and concrete. Specification

Published:

30 Apr 2016

Withdrawn:

26 Nov 2024