GB/T 30805-2024 English PDF

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GB/T 30805-2024: Thermal insulating products for building applications - Determination of short-term water absorption by partial immersion
Status: Valid

GB/T 30805: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 30805-2024	274	Add to Cart	3 days	Thermal insulating products for building applications - Determination of short-term water absorption by partial immersion	Valid
GB/T 30805-2014	90	Add to Cart	Auto, < 3 mins	Thermal insulating products for building applications -- Determination of short term water absorption by partial immersion	Valid

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Basic data

Standard ID: GB/T 30805-2024 (GB/T30805-2024)
Description (Translated English): Thermal insulating products for building applications - Determination of short-term water absorption by partial immersion
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Q25
Classification of International Standard: 91.120.10
Word Count Estimation: 14,144
Date of Issue: 2024-07-24
Date of Implementation: 2025-02-01
Older Standard (superseded by this standard): GB/T 30805-2014
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 30805-2024: Thermal insulating products for building applications - Determination of short-term water absorption by partial immersion

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Thermal insulating products for building applications - Determination of short-term water absorption by partial immersion Thermal insulation products for building use - Determination by partial immersion method Short-term water absorption Thermal insulating products for building applications-Determination of short-term water absorption by partial immersion (ISO 29767.2019, IDT) ICS 91.120.10 CCS Q 25 National Standard of the People's Republic of China Replaces GB/T 30805-2014 Published on July 24, 2024, implemented on February 1, 2025 State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface ... 1 Scope ... 2 Normative referenced documents ... 3 Terms and Definitions ... 4 Principle ... Added description of test requirements for tropical regions in “Test conditions” (see 7.1); c) Changed the time for removing the sample in Method A and Method B in the "Test Procedure" (see 7.2.1, 7.2.2, 6.2.1,.2014 Edition) 6.2.2). d) This document is equivalent to ISO 29767.2019 "Thermal insulation products for building use - Determination of short-term water absorption by partial immersion method". The following minimal editorial changes were made to this document. Corrected the typographical error in ISO 29767.2019, and adjusted the tropical region to (23±2)℃, (65±5)% relative humidity. The humidity conditions were modified to use (27±2)℃, (65±5)% relative humidity. Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by China Building Materials Federation. This document is under the jurisdiction of the National Technical Committee for Standardization of Thermal Insulation Materials (SAC/TC 191). This document was drafted by. Nanjing Fiberglass Research and Design Institute Co., Ltd., Anqing Yineng Insulation Materials Co., Ltd., Shanghai Da Yinxisheng New Materials Co., Ltd. The main drafters of this document are. Jiang Lu, Cui Jun, Zhang Rui, Meng Hao, Wang Zhiyuan, Wang Zhiping, Pan Yang, and Zhang Shuaikai. This document was first published in.2014 and this is the first revision. Thermal insulation products for building - Determination by partial immersion method Short-term water absorption

1 Scope

This document describes the apparatus and procedure for determining the short-term water absorption of samples by partial immersion. This document applies to thermal insulation products. NOTE. The procedures specified in this document are intended to simulate water absorption caused by rain during 24 hours of construction.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies. in this document. ISO 29768 Thermal insulating products for building applications-Determination of linear dimensions of test specimens)

3 Terms and definitions

There are no terms or definitions that require definition in this document.

4 Principle

The lower half of the sample was placed in water, and after 24 h, its mass change was measured. Excess water adhering to the surface but not absorbed into the sample is removed by method A (drainage method) or calculated by method B.

5 Instruments

5.1 Use a balance to measure the mass of the sample to an accuracy of 0.1 g. 5.2 Water tank, means for controlling the water level to be constant within ±2 mm and means for keeping the specimen in the required position. Figure 1 shows the test apparatus. Example. The device for maintaining the position of the specimen shall cover no more than 15% of the cross-sectional area of the specimen in water. 5.3 Tap water, adjusted to (23 ± 5) °C. In case of dispute, deionized water should be used. In tropical areas, different environmental and test conditions. In this case, the temperature should be adjusted to (27 ± 5) °C and should be stated in the test report. 5.4 Drainage apparatus. Examples of such apparatus are given in Figures 2a) and 2b). ......

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