前言:这是CSA A123的第一版。23，预制和加固聚合物改性沥青板的产品规范。本标准旨在提供用于屋面的预制和增强聚合物改性沥青板的最低要求。它的开发目的是取代CGSB 37-GP-56，CGSB 37-GP-56上一次修订是在1985年。范围:1.1概述1。1.1本标准涵盖了用作屋面防水平面（包括屋面防水板）的聚合物改性（苯乙烯-丁二烯-苯乙烯嵌段共聚物和无规聚丙烯）沥青板。1.1.2本标准涵盖了工厂制造的聚合物改性沥青板，在单层或多层中安装以形成一个系统的成品板材。1.1.3虽然聚合物改性沥青板在建筑围护结构中也有其他用途，但该标准不考虑这些附加用途。 1.1.4本标准不涉及系统性能和设计标准，如耐火或抗风、安装技术和附件产品。设计师有责任确定（并根据要求向有管辖权的机构证明）所选板材或板材组合适合预期用途。1.2分类1。2.1类型本标准涵盖以下类型的聚合物改性沥青板:a）a型-玻璃纤维增强聚合物改性沥青板；b） b类——聚酯纤维增强聚合物改性沥青板；C类——用玻璃纤维和聚酯纤维组合而成的垫子加固的聚合物改性沥青板。1.2.2等级本标准涵盖以下等级的聚合物改性沥青板: a） 一年级和二年级- 拟暴露的聚合物改性沥青板。1级表面有矿物颗粒，位于天气侧。2级表面可在天气面与任何其他提供紫外线防护的表面（如工厂涂敷的涂层或薄膜）一起铺设，或未铺设；和 b） 3级——不打算暴露的聚合物改性沥青板。1.3双重尺寸以国际单位制给出的数值为本标准的记录单位。括号中给出的值仅供参考和比较。1.4本标准中的术语“应”用于表示要求，即用户为遵守本标准而有义务满足的规定；“应该”用于表示建议或建议但不需要的建议；“可”用于表示一个选项或在标准范围内允许的选项。 注释随附条款不包括要求或替代要求；随附条款的注释的目的是将解释性或信息性材料与文本分开。表和图的注释被视为表或图的一部分，可以作为要求编写。附件被指定为规范性（强制性）或信息性（非强制性）以定义其应用。

Preface:This is the first edition of CSA A123.23,Product specification for polymer-modified bitumen sheet, prefabricated and reinforced.This Standard is intended to provide minimum requirements for prefabricated and reinforced polymer-modified bitumen sheets used in roofing. It has been developed with the objective of replacing CGSB 37-GP-56, which was last amended in 1985.Scope:1.1 General1.1.1This Standard covers polymer-modified (styrene-butadiene-styrene block copolymer and atactic polypropylene) bitumen sheets intended for use as the plane of watertightness in roofing (including roof flashings).1.1.2This Standard covers polymer-modified bitumen sheets that are manufactured in a factory as a single, finished sheet and that are installed in a single layer or in multiple layers to form a system.1.1.3Although polymer-modified bitumen sheets also have other uses in the building envelope, this Standard does not consider these additional uses.1.1.4This Standard does not address system performance and design criteria such as resistance to fire or wind uplift, installation techniques, and accessory products. It is the responsibility of the designer to establish (and demonstrate to the authority having jurisdiction, upon request) that the selected sheet or combination of sheets is suitable for the intended use.1.2 Classification1.2.1Types The following types of polymer-modified bitumen sheets are covered by this Standard:a) Type A - glass-fibre-reinforced polymer-modified bitumen sheets;b) Type B - polyester-fibre-reinforced polymer-modified bitumen sheets; andc) Type C - polymer-modified bitumen sheets reinforced with a mat composed of a combination of glass and polyester fibres.1.2.2 GradesThe following grades of polymer-modified bitumen sheets are covered by this Standard: a) Grades 1 and 2 - polymer-modified bitumen sheets intended to be exposed. Grade 1 is surfaced with mineral granules on the weather side. Grade 2 is either surfaced on the weather side with any other surfacing providing UV protection (such as factory-applied coating or film) or is unsurfaced; and b) Grade 3 - polymer-modified bitumen sheets not intended to be exposed.1.3 Dual dimensionsThe values given in SI units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only.1.4 TerminologyIn this Standard, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; "should" is used to express a recommendation or that which is advised but not required; and "may" is used to express an option or that which is permissible within the limits of the Standard. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.