EN 1770:1998

Products and systems for the protection and repair of concrete structures - Test methods - Determination of the coefficient of thermal expansion

This European Standard specifies methods for the determination of the coefficient of thermal expansion of hardened structural bonding agents. The first method provides a continuous measurement of linear thermal expansion using thermomechanical analysis techniques. This method may also be used for surface protection systems. The alternative method uses prisms of 40 mm x 40 mm x 160 mm. This method may also be used for repair mortar. Both methods are suitable for bonding agents formulated with fillers of up to 4 mm.

Produkte und Systeme für den Schutz und die Instandsetzung von Betontragwerken - Prüfverfahren - Bestimmung des Wärmeausdehnungskoeffizienten

Diese Europäische Norm legt Verfahren zur Messung des Wärmeausdehnungskoeffizienten von gehärteten Konstruktionsklebstoffen fest. Das erste Verfahren beinhaltet eine kontinuierliche Messung der linearen Wärmeausdehnung mit Hilfe thermomechanischer Analysetechniken. Dieses Verfahren darf auch für Oberflächen-Schutzsysteme angewandt werden. Beim Alternativverfahren werden Prismen mit den Maßen 40 mm x 40 mm x 160 mm verwendet. Dieses Verfahren darf auch für Mörtel für die Instandsetzung angewandt werden.

Produits et systèmes pour la protection et la réparation des structures en béton - Méthodes d'essais - Détermination du coefficient de dilatation thermique

La présente norme européenne prescrit des méthodes de détermination du coefficient de dilatation thermique des liants structuraux durcis. La première méthode permet un mesurage continu de la dilatation thermique linéaire à l'aide de techniques d'analyse thermomécaniques. Elle peut également être utilisée pour les systèmes de protection de surface. L'autre méthode utilise des prismes de 40 mm x 40 mm x 160 mm. Elle peut également s'appliquer aux mortiers de réparation. Les deux méthodes conviennent pour les liants à bases de fines allant jusqu'à 4 mm.

Proizvodi in sistemi za zaščito in popravilo betonskih konstrukcij - Preskusne metode - Določevanje toplotnega razteznostnega koeficienta

General Information

• Status: Published
• Publication Date: 17-Mar-1998
• ICS: 91.080.40 - Concrete structures
• Technical Committee: CEN/TC 104 - Concrete ( performance, production, placing and compliance criteria )
• Drafting Committee: CEN/TC 104/SC 8/WG 3 - Bonding
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 18-Jun-2021
• Completion Date: 14-Apr-2025
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Mandate: M/128 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on products for concrete, mortar and grout
• Ref Project: SIST EN 1770:2000 - Products and systems for the protection and repair of concrete structures - Test methods - Determination of the coefficient of thermal expansion

Overview - EN 1770:1998 (CEN)

EN 1770:1998 is a European Standard from CEN that specifies test methods for determining the coefficient of thermal expansion (CTE) of hardened structural bonding agents used in concrete repair and protection. The standard defines two accepted measurement approaches: a continuous thermomechanical analysis technique and an alternative prism-based method. It applies to bonding agents (and in certain cases to repair mortars and surface protection systems) formulated with fillers up to 4 mm.

Key topics and technical requirements

• Scope: Methods for measuring linear thermal expansion of hardened bonding agents used with concrete structures.
• Method A - Thermomechanical analysis (TMA):
  • Provides a continuous measurement of linear thermal expansion with thermomechanical analysis techniques.
  • Can also be applied to surface protection systems where continuous data are beneficial.
• Method B - Prism method:
  • Uses prismatic specimens sized 40 mm × 40 mm × 160 mm for discrete measurements.
  • Also suitable for repair mortars when the prism geometry is representative.
• Material limits: Both methods are suitable for bonding agents formulated with fillers up to 4 mm in size.
• Intended output: Determination of linear coefficient of thermal expansion (CTE) for use in material characterization, specification, and quality control.

Applications and practical value

EN 1770 is intended for use by:

• Materials and testing laboratories performing CTE measurements for product certification and quality assurance.
• Manufacturers of structural bonding agents, repair mortars, and surface protection systems during product development and batch control.
• Specifying engineers and contractors who need CTE data to check compatibility between repair products and concrete substrates.
• Researchers studying thermal compatibility, shrinkage, and durability of repair materials.

Practical benefits:

• Ensures thermal compatibility between repair products and concrete to reduce risk of cracking, delamination, or premature failure.
• Supports product selection and specification for climate-exposed structures where thermal movement is significant.
• Provides repeatable test procedures for regulatory compliance, performance claims, and comparative assessments.

Related standards

• EN 1770 complements other CEN standards addressing products and systems for the protection and repair of concrete structures, and standards for mechanical and durability testing of repair materials. For project specifications, combine CTE data from EN 1770 with structural and environmental design requirements.

Keywords: EN 1770, coefficient of thermal expansion, thermal expansion, thermomechanical analysis, bonding agents, repair mortar, surface protection systems, CEN, concrete repair, test methods.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Produkte und Systeme für den Schutz und die Instandsetzung von Betontragwerken - Prüfverfahren - Bestimmung des WärmeausdehnungskoeffizientenProduits et systemes pour la protection et la réparation des structures en béton - Méthodes d'essais - Détermination du coefficient de dilatation thermiqueProducts and systems for the protection and repair of concrete structures - Test methods - Determination of the coefficient of therm
...