CEN/TC 177 - Prefabricated reinforced components of autoclaved aerated concrete or light-weight aggregate concret

This European Standard is for prefabricated reinforced components of autoclaved aerated concrete to be used in building construction for:
a)   Structural elements:
-   loadbearing wall components;
-   retaining wall components;
-   roof components;
-   floor components;
-   linear components (beams and piers).
b)   Non-structural elements:
-   non-loadbearing wall components (partition walls);
-   cladding components (without fixtures) intended to be used for external facades of buildings;
-   small box culverts used to form channels for the enclosure of services;
-   components for noise barriers.
Depending on the type and intended use of elements for which the components are utilized, the components can be applied - in addition to their loadbearing and encasing function - for purposes of fire resistance, sound insulation and thermal insulation indicated in the relevant clauses of this European Standard.
Components covered by this standard are only intended to be subjected to predominantly non-dynamic actions, unless special measures are introduced in the relevant clauses of this European Standard.
The term "reinforced" relates to reinforcement used for both structural and non-structural purposes.
This European Standard does not cover:
-   rules for the application of these components in structures;
-   joints (except their strength and integrity E of resistance to fire);
-   fixtures;
-   finishes for external components, such as tiling.
NOTE   AAC components may be used in noise barriers if they are designed to fulfil also the requirements of EN 14388.

This European Standard is for prefabricated components of lightweight aggregate concrete (LAC) with open structure and with structural or non-structural reinforcement intended to be used in building construction
a)   for structural elements:
-   loadbearing wall components (solid, hollow core or multilayer);
-   retaining wall components (solid) with or without surcharge loading;
-   roof components (solid, hollow core or multilayer);
-   floor components (solid, hollow core or multilayer);
-   linear components (beams or piers).
b)    for non-structural elements:
-   non-loadbearing wall components (e.g. for partition walls);
-   cladding components (without fixtures) intended to be used for external facades of buildings;
-   small box culverts used to form channels for the enclosure of services;
-   components for noise barriers.
NOTE 1   In addition to their loadbearing and encasing function, components can also be used to provide fire resistance, sound insulation and thermal insulation.
Components covered by this European Standard are only intended to be subjected to predominantly non-dynamic actions, unless special measures are introduced in the relevant clauses of this European Standard.
The term "reinforced" relates to reinforcement used for both structural and non-structural purposes.
This European Standard does not cover:
-   rules for the application of these components in structures;
-   joints (except their strength);
-   fixtures;
-   finishes for external components, such as tiling.
NOTE 2   LAC components can be used in noise barriers if they are designed to fulfil also the requirements of EN 14388.

This document specifies a method of determining the long term bond behaviour between reinforcing bars and autoclaved aerated concrete (AAC) in prefabricated reinforced components according to EN 12602. The test method is conceived to obtain values for the long term bond strength fb,l which are obtained in a final short term test. The test is performed for different combinations of AAC type, bar shape, and corrosion protection systems.

This document specifies a method of determining the freeze-thaw resistance of autoclaved aerated concrete manufactured according to EN 12602 or EN 771-4.

This European Standard specifies methods of determining the shear strength for in-plane forces of joints between prefabricated components made of autoclaved aerated concrete (AAC) according to prEN 12602 or lightweight aggregate concrete with open structure (LAC) according to EN 1520.

This document specifies a pull-out test method for the verification of the applicability of the declared outer diameter of the transverse bars with corrosion protection coating tot,g in the calculation of the anchorage capacity of transverse anchorage bars (see A.10.3 in prEN 12602:2006) in prefabricated reinforced components of autoclaved aerated concrete (AAC).

This Euopean Standard specifies a method for measuring the relative length changes due to drying (drying shrinkage) of autoclaved aerated concrete manufactured according to EN 771-4 or prEN 12602. The shrinkage characteristics determined according to this method are the following: The conventional reference value of drying shrinkage is the relative length change between two specified moisture contents. The total value of drying shrinkage is the relative length change due to drying from the saturated state until reaching constant length under specified climatic conditions. Other drying shrinkage values may be determined between other parameters to meet other specified national requirements.

This European Standard specifies a method of determining the compressive strength of lightweight aggregate concrete with open structure (LAC) according to EN 1520.
The reference test method uses test specimens (cores or cubes) taken from prefabricated components.
Test specimens cast separately in moulds may also be used. This alternative procedure is described in Annex A.

This European Standard specifies the procedure for the determination of the compressive strength of autoclaved aerated concrete.

This European Standard specifies methods for verification of the effectiveness of the corrosion protection of reinforcing steel embedded in autoclaved aerated concrete (AAC) components according to prEN 12602 or components of lightweight aggregate concrete with open structure (LAC) according to prEN 1520.

This European Standard specifies a method of determining the bond behaviour between reinforcing bars and autoclaved aerated concrete (AAC) in prefabricated reinforced components according to prEN 12602. The test method is conceived to obtain values for the short term bond strength, tbm, with different combinations of concrete type, bar shape and corrosion protection system.

This European Standard specifies a method of determining the shear strength under short-term loading between the different layers of prefabricated multilayer components made of autoclaved aerated concrete (AAC) according to prEN 12602 or lightweight aggregate concrete with open structure (LAC) according to prEN 1520. This test method is suitable only for evaluation of conformity purposes during production of multilayer components.

This European Standard specifies a method of determining the mechanical performances of prefabricated components made of autoclaved aerated concrete (AAC) according to prEN 12602 or lightweight aggregate concrete with open structure (LAC) according to prEN 1520 under longitudinal load which may be combined with transverse load. These performances include: - the deflections and maximum crack width in the serviceability limit state; - the loadbearing capacity (failure load); - the load-(vertical) deformation diagram, if required.

This European Standard specifies a method of determining the steel stresses in longitudinal bars ad midspan of unloaded reinforced components made of autoclaved aerated concrete (AAC) according to prEN 12602.

This European Standard specifies a method of determining the shear strength for out-of-plane forces of joints between prefabricated components made of autoclaved aerated concrete (AAC) according to prEN 12602 or lightweight aggregate concrete with open structure (LAC) according to prEN 1520.

This European Standard specifies a method of determining the shear strength of welded joints in reinforcements intended for use in prefabricated components made of autoclaved aerated concrete (AAC) according to prEN 12602 or lightweight aggregate concrete with open structure (LAC) according to prEN 1520.

This European Standard specifies a method of determining the mechanical perfor- mances of prefabricated reinforced components of autoclaved aerated concrete (AAC) or lightweight aggregate concrete with open structure (LAC) according to prEN 1520 under transvere load. These include: - the midspan deflections for different load levels; - the cracking load; - the ultimate load by progressive loading until collapse; - the position and the shape of fracture.

This European Standard specifies the procedure for the determination of the moisture content of prefabricated components of autoclaved aerated concrete (AAC).

This European Standard specifies a method of determining the static static modulus of elasticity in compression of autoclaved aerated concrete (AAC) or lightweight aggregate with open structure (LAC) according to prEN 1520.

This European standard specifies the procedure for the determination of the longitudinal long-term strains (creep strains) of test specimens taken from prefabricated components of autoclaved aerated concrete (AAC)     or lightweight aggregate concrete with open structure (LAC) according to EN 1520 due to a constant compression stress sustained over a long period of time.

This European Standard specifies a method of determining the flexural (tensile) strength of autoclaved aerated concrete (AAC) by means of prismatic test spe- cimens taken from prefabricated components.

This European standard specifies a method of determining the flexural (tensile) strength of lightweight aggregate concrete with open structure (LAC) according to prEN 1520 by means of prismatic test specimens taken from prefabricated components.

This European standard specifies a method of fetermining the dry density of lightweight aggregate concrete with open structure (LAC).

This European standard specifies a method of determining the essential dimensions and of verification of squareness of prefabricated reinforced components made of autoclaved aerated (ACC) or lightweight aggregate concrete with open structure according to prEN 1520.

This European standard specifies a method of determining the bond behaviour between reinforcing bars and autoclaved aerated concrete (AAC). The test may be used for quality control purposes. Values to be used in design cannot be derivedfrom the test results.

This European Standard specifies the procedure for the determination of the dry density of prismatic specimens of autoclaved aerated concrete.

This European Standard is for prefabricated reinforced components of autoclaved aerated concrete to be used in building construction for: a) Structural elements: - loadbearing wall components; - retaining wall components; - roof components; - floor components; - linear components (beams and piers). b) Non-structural elements: - nonloadbearing wall components (partition walls); - cladding components (without fixtures) intended to be used for external facades of buildings; - small box culverts used to form channels for the enclosure of services; - components for noise barriers. Depending on the type and intended use of elements for which the components are utilised, the components can be applied - in addition to their loadbearing and encasing function - for purposes of fire resistance, sound insulation and thermal insulation indicated in the relevant clauses of this European Standard. Components covered by this standard are only intended to be subjected to predominantly non-dynamic actions, unless special measures are introduced in the relevant clauses of this European Standard. The term "reinforced" relates to reinforcement used for both structural and non-structural purposes. This European Standard does not cover: - rules for the application of these components in structures; - joints (except their strength and integrity E of resistance to fire); - fixtures; - finishes for external components, such as tiling. NOTE AAC components may be used in noise barriers if they are designed to fulfil also the requirements of EN 14388.

This document provides guidelines for the application of reinforced LAC 1) components according to EN 1520 in building structures and covers the following types of structural components: - loadbearing wall components (solid); - roof components (solid, hollow core and multilayer); - floor components (solid, hollow core and multilayer); - linear components (beams and piers) and the following types of non-structural components: - non-loadbearing wall components (partition walls); - cladding components. LAC components are industrially manufactured individual parts. A combined action of these parts requires usually the aid of non LAC materials (e.g. reinforcement, metal plates, fixings, anchorages, adhesives, mortar, concrete). The application covers aspects of: - material properties; - design of joints;
- design with components; - means of anchorage or fixtures; - construction and workmanship. The design rules for the LAC components are defined in EN 1520, annex A (Design by calculation) and EN 1520, annex B (Design by testing).

This European Standard is for prefabricated reinforced components of autoclaved aerated concrete to be used in building construction for:
a)   Structural elements:
-   loadbearing wall components;
-   retaining wall components;
-   roof components;
-   floor components;
-   linear components (beams and piers).
b)   Non-structural elements:
-   nonloadbearing wall components (partition walls);
-   cladding components (without fixtures) intended to be used for external facades of buildings;
-   small box culverts used to form channels for the enclosure of services;
-   components for noise barriers.
Depending on the type and intended use of elements for which the components are utilised, the components can be applied - in addition to their loadbearing and encasing function - for purposes of fire resistance, sound insulation and thermal insulation indicated in the relevant clauses of this European Standard.
Components covered by this standard are only intended to be subjected to predominantly non-dynamic actions, unless special measures are introduced in the relevant clauses of this European Standard.
The term "reinforced" relates to reinforcement used for both structural and non-structural purposes.
This European Standard does not cover:
-   rules for the application of these components in structures;
-   joints (except their strength and integrity E of resistance to fire);
-   fixtures;
-   finishes for external components, such as tiling.
NOTE   AAC components may be used in noise barriers if they are designed to fulfil also the requirements of EN 14388.

This European Standard is for prefabricated reinforced components of autoclaved aerated concrete to be used in building construction for:
a)   Structural elements:
-   loadbearing wall components;
-   retaining wall components;
-   roof components;
-   floor components;
-   linear components (beams and piers).
b)   Non-structural elements:
-   nonloadbearing wall components (partition walls);
-   cladding components (without fixtures) intended to be used for external facades of buildings;
-   small box culverts used to form channels for the enclosure of services;
-   components for noise barriers.
Depending on the type and intended use of elements for which the components are utilised, the components can be applied - in addition to their loadbearing and encasing function - for purposes of fire resistance, sound insulation and thermal insulation indicated in the relevant clauses of this European Standard.
Components covered by this standard are only intended to be subjected to predominantly non-dynamic actions, unless special measures are introduced in the relevant clauses of this European Standard.
The term "reinforced" relates to reinforcement used for both structural and non-structural purposes.
This European Standard does not cover:
-   rules for the application of these components in structures;
-   joints (except their strength and integrity E of resistance to fire);
-   fixtures;
-   finishes for external components, such as tiling.
NOTE   AAC components may be used in noise barriers if they are designed to fulfil also the requirements of EN 14388.

This European Standard is for prefabricated reinforced components of lightweight aggregate concrete with open structure intended to be used in building constructions: a) for structural elements: - loadbearing wall components (solid, hollow core and multilayer); - retaining wall components (solid) with or without surcharge loading; - roof components (solid, hollow core and multilayer); - floor components (solid, hollow core and multilayer); - linear components (beams and piers).

This document specifies a method of determining the freeze-thaw resistance of autoclaved aerated concrete manufactured according to prEN 12602 or EN 771-4.

This European Standard specifies a method of determining the long term bond behaviour between reinforcing bars and autoclaved aerated concrete (AAC) in prefabricated reinforced components according to prEN 12602. The test method is conceived to obtain values for the long term bond strength fb,l which are obtained in a final short term test. The test is performed for different combinations of AAC type, bar shape, and corrosion protection systems.

This European Standard specifies a method of determining the shear strength for in-plane forces of joints between prefabricated components made of autoclaved aerated concrete (AAC) according to prEN 12602 or lightweight aggregate concrete with open structure (LAC) according to prEN 1520.

This European Standard specifies the procedure for the determination of the relative deformation during drying (drying shrinkage) of autoclaved aerated concrete.

This European Standard specifes a method of determining theination of the compressive strength of lightweight aggregate concrete with open structure (LAC) according to prEN 1520. The reference test method uses test specimens (core or cubes) taken from prefabricated components. Test specimens cast separately in moulds may also be used. This procedure is described in Annex A.

This European Standard specifies the procedure for the determination of the compressive strength of autoclaved aerated concrete.

TC - Many modifications throughout the text (Clauses 7 and 8, A.2, Annex B, Annex ZA)

This European standard specifies methods for verification of the effectiveness of the corrosion protection of reinforcing steel embedded in autoclaved aerated concrete (AAC) components or components of lightweight aggregate concrete with open structure (LAC) according to prEN 1520. Tests according to this standard are not required for LAC-components if corrosion protection is achieved by embedding the reinforcing bars completely in a zone of concrete with closed structure according to 4.4.3.3 of prEN 1520.