Standard No.:	GB/T 13477.21-2022
English Name:	Test method for building sealants—Part 21：Determination of color change after laboratory accelerated weathering procedures
Chinese Name:	建筑密封材料试验方法 第21部分：人工加速气候老化后颜色变化的测定
Chinese Classification:	Q24    Sealing material
Professional Classification:	GB    National Standard
ICS Classification:	91.100.50 91.100.50    Binders. Sealing materials 91.100.50
Issued by:	SAMR; SAC
Issued on:	2022-7-11
Implemented on:	2023-2-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	3500 words
Price(USD):	105.00
Delivery:	via email in 1~3 business day

本标准规定了建筑密封胶经过人工加速气候老化后颜色变化测定方法的术语和定义、原理、试验条件、试验器具和材料、试件制备和养护、试验步骤、颜色测量和色差计算、变色等级的划分和试验报告。
本标准适用于建筑密封胶经过人工加速气候老化后颜色变化的测定和变色等级的划分。