SIST EN 1742:2001

Overview

SIST EN 1742:2001 is a European Standard developed by CEN that specifies a standardized test method for determining the shear strength between different layers of multilayer prefabricated components. These components are made from autoclaved aerated concrete (AAC) or lightweight aggregate concrete (LAC) with an open structure. The standard is specifically designed for short-term loading conditions, ensuring reliable evaluation of the bonding quality between layers during production. The test outlined in SIST EN 1742:2001 is primarily intended for conformity assessment purposes, verifying the integrity and performance of multilayer components in manufacturing settings.

Key Topics

• Shear Strength Measurement
  The standard focuses on quantifying the shear strength between layers in multilayer components, which is critical to the structural performance of elements using AAC or LAC.

• Materials Covered

  • Autoclaved Aerated Concrete (AAC) according to prEN 12602
  • Lightweight Aggregate Concrete (LAC) with open structure as per prEN 1520

• Short-Term Loading Conditions
  The test method is designed to evaluate shear strength under conditions simulating immediate or short-duration loads, relevant for quality control in production.

• Prefabricated Multilayer Components
  Components tested are factory-made with multiple concrete layers, requiring reliable interlayer bonding for structural stability.

• Conformity Evaluation
  Using this standard ensures that products meet predefined quality benchmarks before reaching the market.

Applications

SIST EN 1742:2001 is applicable in several practical contexts related to the production and quality assurance of advanced concrete building elements:

• Manufacturing Quality Control
  Enables producers of multilayer AAC and LAC elements to systematically test and certify the interlayer bond strength, ensuring consistent product reliability.

• Structural Design Verification
  Provides engineers and designers with dependable shear strength data to inform safe and durable multilayer component designs.

• Building Construction
  Enhances the performance of prefabricated concrete wall panels, façade elements, and other multilayer components by verifying their ability to withstand shear stresses.

• Product Development
  Assists in optimizing mix designs and layer compositions for improved bonding and overall component strength.

Related Standards

• prEN 12602 – Specifies requirements for autoclaved aerated concrete components used in construction, referenced for AAC material specifications within EN 1742 applications.

• prEN 1520 – Defines standards for lightweight aggregate concrete with open structure, providing material guidelines related to LAC components evaluated under EN 1742.

• EN 1992 (Eurocode 2) – Design of concrete structures, useful for integrating test data on shear strength into structural design models.

• EN 13369 – Common rules for precast concrete products, which may incorporate multilayer components tested to EN 1742.

Keywords

Autoclaved Aerated Concrete, AAC, Lightweight Aggregate Concrete, LAC, Shear Strength, Multilayer Components, Prefabricated Concrete, Short-term Loading, CEN Standard, Concrete Product Testing, Conformity Assessment, Structural Integrity, Concrete Layer Bonding, European Standards.