ISO 18886:2016规定了在环境温度下通过湿喷制备耐火材料试样的程序。试样用于测定在“标准条件”(质量保证或产品开发所需)或“现场条件”下制备的湿喷产品的性能。在“现场条件”的情况下,测试的目的是确定与给定安装或给定安装条件集有关的属性。在这种情况下,在现场安装期间获得喷补面板。在面板制备过程中应用的活化剂添加(类型、数量、添加方法)、输送压力和固化条件(温度、面板方向)等参数尽可能接近与现场安装相关的相同参数。
本程序适用于耐火材料,这些耐火材料在与材料浇筑所需的总水量混合后,可通过喷补软管运输。这些材料的稠度(见7.5)通常适合通过浇铸进行浇筑,前提是这些材料不通过喷补软管运输并通过喷涂进行涂覆。
在“干燥”状态下通过喷射软管气动输送的耐火材料,即使在与总需水量的一部分(喷嘴处添加的大部分水)混合后,也应在ISO 20182中处理。
ISO 18886:2016不适用于塑料耐火材料的喷补(参考ISO 1927-1)。
ISO 18886:2016 specifies the procedures for the preparation of test pieces from refractory materials by wet gunning at ambient temperatures. The test pieces are for the determination of properties on wet-gunned products prepared under either "standard conditions" (as required for quality assurance or product development) or "site conditions". In the case of "site conditions", the purpose of the testing is to establish the properties pertaining to a given installation or a given set of installation conditions. In this case, the gunned panel is obtained during the on-site installation. Such parameters as activator addition (type, amount, method of addition), conveying pressure and curing conditions (temperature, orientation of the panel) applying during the preparation of the panel are as near as possible to the same parameters pertaining to the site installation.
This procedure applies to refractory materials that can be transported through a gunning hose after having been mixed with the total water requirement for material placement. The consistency of these materials (see 7.5) is typically such that they would be suitable for placement by casting were they not to be transported through the gunning hose and applied by spraying.
Refractory materials that are pneumatically conveyed in the "dry" state through a gunning hose, even after mixing with a portion of the total water requirement (the bulk of the water being added at the nozzle) are dealt with in ISO 20182.
ISO 18886:2016 does not apply to the gunning of plastic refractory materials (refer to ISO 1927?1).