CSA N287.2:2017 pdf download.Material requirements for concrete containment structures for nuclear power plants
5.2.5 Admixtures
Chemical admixtures shall be in accordance with CSA A23.1. The chloride content of admixtures shall be such that, when used at the manufacturer' S recommended addition rate, the admixture will contribute no more than 50 mg of chloride to 1 kg of cement. The chloride-ion content in admixtures shall be determined in accordance with ASTM D4327.9
5.3.4 Aggregates
Aggregates, when used, shall have a maximum particle size of 2.5 mm with a minimum of 95% of the material smaller than 1.25 mm.
If it is confirmed by testing, as acceptable to the operating organization, that there will be no constructability issues or long-term durability problems, the maximum size of aggregate may be increased provided that 100% of the material passes the 10 mm sieve.
Note: For grouted post-tensioning tendons, see Clause 7.6.2.2.
5.3.5 Admixtures
Admixtures shall be in accordance with Clause 5.2.5.
5.4 Repair materials
Repair materials shall be suitable for the intended application and shall consider the plant service life and accident scenario exposure requirements. Repair materials shall be proven, compatible with construction materials, and shall satisfy the requirements of Clause 5, as applicable.
Note: For additional information on concrete repair, see ACI RPMN13.
6.7.1 Materials used for mechanical splicing of reinforcing bars are not limited by this Standard. However, the type of splice selected for a particular application shall be based on the results of the performance tests required by Clause 6.8 and the additional requirements of the technical specification and of CSA N287.3.
6.7.2 Material specifications shall be provided by the manufacturer for all splice sleeve material and the specified material shall satisfy the performance tests required by Clause 6.8.
6.7.3 Materials delivered to the site shall be inspected to verify that they meet the requirements of Clause
6.7.2 by reference to certified mill test reports or letters of compliance that reference the performance test reports required by Clause 6.8.6.
6.7.4 Where mechanical splice sleeves are used for attachment of reinforcing bars to structural steel members or metallic parts, the requirements of Clause 8 of CSA N287.4 shall apply for the qualification of welds, welders, weld procedures, and the compatibility of materials.
6.8.1.6 Tests shall be performed at room temperature (approximately 20 °C) except where operating or accident temperatures are expected to affect splice performance, in which case the test shall be carried out at a temperature 10。C above the maximum accident temperature (high temperature) or 10 °C below the minimum operating temperature (low temperature), or both, as applicable. The high or low temperature, or both, shall be maintained for 24 h prior to the start of testing and until each set of tests has been completed.
The temperature duration and insulating effect of the concrete shall be taken into account when defining the magnitude of accident temperature.CSA N287.2 pdf download.