標準編號:	GB/T 14799-2024
中文名稱:	土工合成材料 有效孔徑的測定 干篩法
英文名稱:	Geosynthetics—Determination of the effective opening size—Dry sieving method
中標分類:	W04    基礎標準與通用方法
行業分類:	GB    國家標準
ICS分類:	59.080.70 59.080.70    土工布 59.080.70
發布機構:	國家市場監督管理總局 國家標準化管理委員會
發布日期:	2024-3-15
實施日期:	2024-10-1
標準狀態:	valid
替代舊標準:	GB/T 14799-2005 土工布及其有關產品 有效孔徑的測定 干篩法
翻譯語言:	英文
文件格式:	PDF
中文字符數:	11000 字
翻譯價格(元):	770.0
交付時間:	付款后 1~3 個工作日

Geosynthetics - Determination of the effective opening size - Dry sieving method 1 Scope This document describes a test method for determining the effective opening size of geosynthetics including geotextiles by the dry sieve method. This document is applicable to the testing of various geosynthetics including geotextiles. 2 Normative references The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 6529 Textiles - Standard atmospheres for conditioning and testing GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values GB/T 13760 Geosynthetics - Sampling and preparation of test specimens 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 passing rate ratio of the mass of the standard granular materials passing through the test specimen after the standard granular materials are sieved to the total mass of the standard granular materials 3.2 effective opening size Oe diameter of an approximate maximum granule that can effectively pass through the test specimen Note: For example, O90 indicates that 90% of the standard granular materials with that diameter fail to pass through the test specimen after such materials are sieved, with the sieve rate as 10%. 4 Principle First, vibrate standard granular materials of a certain mass and with a certain diameter on the test specimen, i.e., the sieve cloth made of geotextile cloth or any other geosynthetics. Then, weigh the mass of the standard granular materials passing through the test specimen and calculate the passing rate. Afterwards, use standard granular materials with different diameters for the test, plotting the curve of the diameter of the standard granular materials versus their passing rate, which is the opening size distribution curve of the test specimen, and calculate the effective opening size Oe (e.g., O90 or O95).

Contents Foreword I 1 Scope 2 Normative references 3 Terms and definitions 4 Principle 5 Apparatus and materials 6 Test specimen 7 Standard atmospheres for conditioning and testing 8 Test procedure 9 Calculation 10 Test report Annex A (Informative) Example of an opening size distribution curve

土工合成材料 有效孔徑的測定 干篩法 1 范圍 本文件描述了用干篩法測定土工布等土工合成材料有效孔徑的試驗方法。 本文件適用于各類土工布等土工合成材料的檢測。 2 規范性引用文件 下列文件中的內容通過文中的規范性引用而構成本文件必不可少的條款。其中，注日期的引用文件，僅該日期對應的版本適用于本文件；不注日期的引用文件，其最新版本(包括所有的修改單)適用于本文件。 GB/T 6529 紡織品 調濕和試驗用標準大氣 GB/T 8170 數值修約規則與極限數值的表示和判定 GB/T 13760 土工合成材料 取樣和試樣準備 3 術語和定義 下列術語和定義適用于本文件。 3.1 過篩率 passing rate 標準顆粒材料經振篩后，通過試樣的標準顆粒材料質量與標準顆粒材料總質量之比。 3.2 有效孔徑 effective opening size Oe 能有效通過試樣的近似最大顆粒直徑。 注：例如O90表示在該值直徑下的標準顆粒材料經振篩后有90%的標準顆粒材料不能通過試樣，過篩率為10%。 4 原理 用土工布等土工合成材料試樣作為篩布，將一定質量和直徑的標準顆粒材料放在試樣上振篩，稱量通過試樣的標準顆粒材料質量，計算出過篩率，調換不同直徑標準顆粒材料進行試驗，繪制出標準顆粒材料直徑與過篩率的曲線，即為試樣的孔徑分布曲線，并求出有效孔徑Oe(如O90或O95)。