Byggnadsmaterial

Ämnesområden: Betong och betongprodukter
Kommittébeteckning: SIS/TK 190 (Betong)
Källa: CEN
Svarsdatum: den 18 dec 2018
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This procedure is a method for evaluating the carbonation resistance of concrete using test conditions that accelerate the rate of carbonation. After a period of preconditioning, the test is carried out under controlled exposure conditions using an increased level of carbon dioxide.

NOTE The test under reference conditions takes a minimum of 112 days comprising a minimum age of the specimen prior to conditioning of 28 days, a minimum conditioning period of 14 days and an exposure to increased carbon dioxide levels of 70 days.

This procedure is not a method for the determination of carbonation depths in existing concrete structures.

Kommittébeteckning: SIS/TK 185 (Cement och byggkalk)
Källa: CEN
Svarsdatum: den 8 jan 2019
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This document applies to hydraulic binder for non-structural applications in construction used as binder for preparation of mortar for masonry, rendering and plastering and other non-structural construction products.

This document specifies the definition and composition of hydraulic binder for non-structural applications (HB). It includes physical, mechanical and chemical requirements and defines strength classes. EN 15368 also states the conformity criteria and the related rules. Necessary durability requirements are also given.

For normal applications the information given in this document, and in the masonry specifications, EN 998-1 and EN 998-2, is generally sufficient. However, in special cases, an exchange of additional information between the producer and user can be helpful. The details of such an exchange are not within the scope of this document but can be dealt with in accordance with national standards or other regulations or can be agreed between the parties concerned.

Terms of delivery or other contractual conditions, normally included in documents exchanged between the supplier and the purchaser of hydraulic binder for non-structural applications, are outside the scope of this document.

Ämnesområden: Betong och betongprodukter
Kommittébeteckning: SIS/TK 190 (Betong)
Källa: CEN
Svarsdatum: den 15 jan 2019
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This document describes the procedure for obtaining the non-steady-state chloride migration coefficient of specimens of hardened concrete at a specified age. The test procedure does not take into account any interaction of concrete with the saline solution over time. The test result is a durability indicator with respect to the resistance of the concrete investigated against chloride penetration.

The test procedure does not apply to concrete specimens with surface treatments such as silanes.

If the aggregate is electrically conductive or porous this will influence the magnitude of chloride migration. This fact is taken into account when establishing threshold values. It prevents comparison of chloride migration values between concretes if the aggregates show a difference of half an order of magnitude (higher or lower) of chloride migration.

Similar influence may be seen when metallic or electrically conducting fibres or particles are present.

Kommittébeteckning: SIS/TK 162 (Lim och limningsteknik)
Källa: CEN
Svarsdatum: den 17 jan 2019
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This document specifies test methods for the evaluation of the mechanical properties for moisture curing, self-curing or water drying foams dispensed from single pressurized containers used as an insulating air sealant and adhesive for both building and non-building applications. This document does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory requirements prior to use. The following test methods are described: - Compression strength: This test method describes how to determine the compressive strength of a cured foam. It gives an indication of the foams resistance against area distributed pressure. The maximum endurable stress is determined. - Movement capability: This test method describes how to determine the movement capability of cured foam. The result gives an indication of the degree of flexibility of the cured foam. - Bonding strength: The method displays the measurement of the bonding power of a One Component (Foam) Adhesive, dispensed from a pressurized can, between two substrates with direct contact. - Tensile strength: This test method describes how to determine the maximum stress a cured foam can withstand while being stretched before breaking. The result gives an indication of the elasticity of the cured foam. - Shear strength: This method displays the behavior of a foam system towards shear forces. It shows the strength and the bonding power of the foam as the sandwich element between wooden plates. The test is conducted according to EN 12090.

Kommittébeteckning: SIS/TK 254 (Järnvägar)
Källa: CEN
Svarsdatum: den 7 feb 2019
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This part of the EN 13230 series defines additional technical criteria and control procedures as well as specific tolerance limits related to manufacturing and testing prestressed bearers for switches and crossings with a maximum length of 8,5 m. Bearers longer than 8,5 m are considered as special elements and will comply with FprEN 13230 5:2015.