{"id":7899,"date":"2026-03-24T16:21:24","date_gmt":"2026-03-24T08:21:24","guid":{"rendered":"https:\/\/www.qualitester.com\/?page_id=7899"},"modified":"2026-03-24T16:21:24","modified_gmt":"2026-03-24T08:21:24","slug":"astm-d4632","status":"publish","type":"page","link":"https:\/\/www.qualitester.com\/ja\/standards\/astm-d4632\/","title":{"rendered":"ASTM D4632"},"content":{"rendered":"<p data-start=\"335\" data-end=\"631\"><strong data-start=\"335\" data-end=\"349\">ASTM D4632<\/strong> is a widely recognized standard test method used to determine the <strong data-start=\"416\" data-end=\"485\">breaking load and elongation of geotextiles using the grab method<\/strong>. This method provides an <strong data-start=\"511\" data-end=\"556\">index-based evaluation of fabric strength<\/strong>, making it highly valuable for <strong data-start=\"588\" data-end=\"630\">quality control and acceptance testing<\/strong>.<\/p>\n<p data-start=\"633\" data-end=\"962\">Unlike strip tensile testing, ASTM D4632 focuses on <strong data-start=\"685\" data-end=\"711\">partial-width gripping<\/strong>, allowing adjacent fibers to contribute to the measured strength. This approach better reflects <strong data-start=\"808\" data-end=\"846\">real-world application performance<\/strong>, especially in geotechnical engineering projects such as road stabilization, drainage systems, and erosion control.<\/p>\n<p data-start=\"964\" data-end=\"1141\">It is important to note that ASTM D4632 is <strong data-start=\"1007\" data-end=\"1043\">not suitable for knitted fabrics<\/strong>, and results should only be compared among materials with <strong data-start=\"1102\" data-end=\"1140\">similar structural characteristics<\/strong>.<\/p>\n<hr data-start=\"1143\" data-end=\"1146\" \/>\n<h2 data-section-id=\"ta4ci9\" data-start=\"1148\" data-end=\"1186\">Grab Tensile Strength in ASTM D4632<\/h2>\n<p data-start=\"1188\" data-end=\"1365\">The concept of <strong data-start=\"1203\" data-end=\"1228\">grab tensile strength<\/strong> is central to ASTM D4632. It refers to the <strong data-start=\"1272\" data-end=\"1364\">maximum force required to rupture a specimen when only a portion of its width is clamped<\/strong>.<\/p>\n<h3 data-section-id=\"1lo798l\" data-start=\"1367\" data-end=\"1391\">Key Characteristics:<\/h3>\n<ul data-start=\"1392\" data-end=\"1588\">\n<li data-section-id=\"lvt66d\" data-start=\"1392\" data-end=\"1450\">Reflects <strong data-start=\"1403\" data-end=\"1450\">effective fabric strength in use conditions<\/strong><\/li>\n<li data-section-id=\"marzu7\" data-start=\"1451\" data-end=\"1503\">Includes <strong data-start=\"1462\" data-end=\"1503\">support from adjacent yarns or fibers<\/strong><\/li>\n<li data-section-id=\"13k0ohw\" data-start=\"1504\" data-end=\"1588\">\u63d0\u4f9b <strong data-start=\"1515\" data-end=\"1549\">practical performance insights<\/strong> rather than absolute material strength<\/li>\n<\/ul>\n<p data-start=\"1590\" data-end=\"1739\">In this method, a specimen (typically 100 mm wide) is clamped using <strong data-start=\"1658\" data-end=\"1677\">25 mm wide jaws<\/strong>, ensuring that only the central portion is directly stressed.<\/p>\n<hr data-start=\"1741\" data-end=\"1744\" \/>\n<h2 data-section-id=\"e6c5vh\" data-start=\"1746\" data-end=\"1788\">Geotextile Grab Strength Test Procedure<\/h2>\n<p data-start=\"1790\" data-end=\"1918\">\u306e <strong data-start=\"1794\" data-end=\"1827\">geotextile grab strength test<\/strong> under ASTM D4632 follows a standardized procedure to ensure repeatability and reliability.<\/p>\n<h3 data-section-id=\"165olwf\" data-start=\"1920\" data-end=\"1945\">1. Specimen Conditioning<\/h3>\n<ul data-start=\"1946\" data-end=\"2052\">\n<li data-section-id=\"16i0jl9\" data-start=\"1946\" data-end=\"1973\">Temperature: <strong data-start=\"1961\" data-end=\"1973\">21 \u00b1 2\u00b0C<\/strong><\/li>\n<li data-section-id=\"14r8yzh\" data-start=\"1974\" data-end=\"2006\">Relative Humidity: <strong data-start=\"1995\" data-end=\"2006\">65 \u00b1 5%<\/strong><\/li>\n<li data-section-id=\"2mi4nt\" data-start=\"2007\" data-end=\"2052\">Ensures consistent environmental conditions<\/li>\n<\/ul>\n<h3 data-section-id=\"1ewi1fb\" data-start=\"2054\" data-end=\"2068\">2. Test Setup<\/h3>\n<ul data-start=\"2069\" data-end=\"2166\">\n<li data-section-id=\"1m4bq9v\" data-start=\"2069\" data-end=\"2106\">Initial gauge length: <strong data-start=\"2093\" data-end=\"2106\">75 \u00b1 1 mm<\/strong><\/li>\n<li data-section-id=\"8gqitx\" data-start=\"2107\" data-end=\"2135\">Test speed: <strong data-start=\"2121\" data-end=\"2135\">300mm\/\u5206<\/strong><\/li>\n<li data-section-id=\"1eocdxh\" data-start=\"2136\" data-end=\"2166\">Strain rate: <strong data-start=\"2151\" data-end=\"2166\">20 \u00b1 5%\/min<\/strong><\/li>\n<\/ul>\n<h3 data-section-id=\"14ple0l\" data-start=\"2168\" data-end=\"2187\">3. Execution Steps<\/h3>\n<ol data-start=\"2188\" data-end=\"2424\">\n<li data-section-id=\"10vcf83\" data-start=\"2188\" data-end=\"2234\">Mount the specimen centrally in the grips<\/li>\n<li data-section-id=\"7smgm7\" data-start=\"2235\" data-end=\"2288\">Apply a <strong data-start=\"2246\" data-end=\"2286\">continuously increasing tensile load<\/strong><\/li>\n<li data-section-id=\"17ck4ew\" data-start=\"2289\" data-end=\"2325\">Continue until specimen rupture<\/li>\n<li data-section-id=\"7yvrv9\" data-start=\"2326\" data-end=\"2424\">Record:\n<ul data-start=\"2340\" data-end=\"2424\">\n<li data-section-id=\"1ub8yax\" data-start=\"2340\" data-end=\"2367\">Peak load (breaking load)<\/li>\n<li data-section-id=\"p6crw6\" data-start=\"2371\" data-end=\"2396\">Elongation at peak load<\/li>\n<li data-section-id=\"ivvrbh\" data-start=\"2400\" data-end=\"2424\">Load-extension curve<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h3 data-section-id=\"8ypse1\" data-start=\"2426\" data-end=\"2446\">4. Important Notes:<\/h3>\n<ul data-start=\"2447\" data-end=\"2628\">\n<li data-section-id=\"1gnr0cn\" data-start=\"2447\" data-end=\"2505\">Discard results if <strong data-start=\"2468\" data-end=\"2496\">slippage or edge failure<\/strong> occurs<\/li>\n<li data-section-id=\"18xvzkk\" data-start=\"2506\" data-end=\"2584\">Test both <strong data-start=\"2518\" data-end=\"2544\">machine direction (MD)<\/strong> \u305d\u3057\u3066 <strong data-start=\"2549\" data-end=\"2582\">cross-machine direction (CMD)<\/strong><\/li>\n<li data-section-id=\"nfu9h2\" data-start=\"2585\" data-end=\"2628\">Report <strong data-start=\"2594\" data-end=\"2628\">average and standard deviation<\/strong><\/li>\n<\/ul>\n<hr data-start=\"2630\" data-end=\"2633\" \/>\n<h2 data-section-id=\"1b36ww8\" data-start=\"2635\" data-end=\"2680\">Grab Tensile Test vs Other Tensile Methods<\/h2>\n<p data-start=\"2682\" data-end=\"2757\">\u306e <strong data-start=\"2686\" data-end=\"2707\">grab tensile test<\/strong> differs significantly from strip tensile testing:<\/p>\n<div class=\"TyagGW_tableContainer\">\n<div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"2759\" data-end=\"3060\">\n<thead data-start=\"2759\" data-end=\"2807\">\n<tr data-start=\"2759\" data-end=\"2807\">\n<th class=\"\" data-start=\"2759\" data-end=\"2768\" data-col-size=\"sm\">Aspect<\/th>\n<th class=\"\" data-start=\"2768\" data-end=\"2793\" data-col-size=\"sm\">Grab Test (ASTM D4632)<\/th>\n<th class=\"\" data-start=\"2793\" data-end=\"2807\" data-col-size=\"sm\">Strip Test<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"2855\" data-end=\"3060\">\n<tr data-start=\"2855\" data-end=\"2896\">\n<td data-start=\"2855\" data-end=\"2866\" data-col-size=\"sm\">\u30af\u30e9\u30f3\u30d7<\/td>\n<td data-start=\"2866\" data-end=\"2882\" data-col-size=\"sm\">Partial width<\/td>\n<td data-start=\"2882\" data-end=\"2896\" data-col-size=\"sm\">Full width<\/td>\n<\/tr>\n<tr data-start=\"2897\" data-end=\"2967\">\n<td data-start=\"2897\" data-end=\"2918\" data-col-size=\"sm\">Fiber contribution<\/td>\n<td data-start=\"2918\" data-end=\"2945\" data-col-size=\"sm\">Includes adjacent fibers<\/td>\n<td data-start=\"2945\" data-end=\"2967\" data-col-size=\"sm\">Direct fibers only<\/td>\n<\/tr>\n<tr data-start=\"2968\" data-end=\"3019\">\n<td data-start=\"2968\" data-end=\"2982\" data-col-size=\"sm\">\u5fdc\u7528<\/td>\n<td data-start=\"2982\" data-end=\"3000\" data-col-size=\"sm\">QC &amp; acceptance<\/td>\n<td data-start=\"3000\" data-end=\"3019\" data-col-size=\"sm\">Design analysis<\/td>\n<\/tr>\n<tr data-start=\"3020\" data-end=\"3060\">\n<td data-start=\"3020\" data-end=\"3034\" data-col-size=\"sm\">Result type<\/td>\n<td data-start=\"3034\" data-end=\"3048\" data-col-size=\"sm\">Comparative<\/td>\n<td data-start=\"3048\" data-end=\"3060\" data-col-size=\"sm\">Absolute<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"3062\" data-end=\"3175\">Because of this, ASTM D4632 is best used for <strong data-start=\"3107\" data-end=\"3174\">quality benchmarking rather than structural design calculations<\/strong>.<\/p>\n<hr data-start=\"3177\" data-end=\"3180\" \/>\n<h2 data-section-id=\"3wj3qx\" data-start=\"3182\" data-end=\"3227\">CRE Tensile Testing Machine for ASTM D4632<\/h2>\n<p data-start=\"3229\" data-end=\"3466\">\u3042 <strong data-start=\"3231\" data-end=\"3291\"><a href=\"https:\/\/www.qualitester.com\/ja\/%e8%a3%bd%e5%93%81\/tst-01-universal-testing-machine\/\" target=\"_blank\" rel=\"noopener\">CRE tensile testing machine<\/a> (Constant Rate of Extension)<\/strong> is essential for conducting ASTM D4632 tests. This type of equipment ensures a <strong data-start=\"3371\" data-end=\"3398\">uniform elongation rate<\/strong>, which is critical for obtaining accurate and reproducible results.<\/p>\n<p data-start=\"3229\" data-end=\"3466\"><a href=\"https:\/\/www.qualitester.com\/ja\/%e8%a3%bd%e5%93%81\/tst-01-universal-testing-machine\/\"><img fetchpriority=\"high\" decoding=\"async\" class=\"alignleft wp-image-7900 size-medium\" src=\"https:\/\/www.qualitester.com\/wp-content\/uploads\/2026\/03\/ASTM-D4632-Geotextile-Grab-Test-for-Breaking-Elongation-300x300.webp\" alt=\"ASTM D4632 Geotextile Grab Test for Breaking Elongation\" width=\"300\" height=\"300\" srcset=\"https:\/\/www.qualitester.com\/wp-content\/uploads\/2026\/03\/ASTM-D4632-Geotextile-Grab-Test-for-Breaking-Elongation-300x300.webp 300w, https:\/\/www.qualitester.com\/wp-content\/uploads\/2026\/03\/ASTM-D4632-Geotextile-Grab-Test-for-Breaking-Elongation-150x150.webp 150w, https:\/\/www.qualitester.com\/wp-content\/uploads\/2026\/03\/ASTM-D4632-Geotextile-Grab-Test-for-Breaking-Elongation-12x12.webp 12w, https:\/\/www.qualitester.com\/wp-content\/uploads\/2026\/03\/ASTM-D4632-Geotextile-Grab-Test-for-Breaking-Elongation-100x100.webp 100w, https:\/\/www.qualitester.com\/wp-content\/uploads\/2026\/03\/ASTM-D4632-Geotextile-Grab-Test-for-Breaking-Elongation.webp 600w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p data-section-id=\"wa9wqq\" data-start=\"3468\" data-end=\"3532\"><strong><big>Recommended Solution: Cell Instruments TST-01 Tensile Tester<\/big><\/strong><\/p>\n<p data-start=\"3534\" data-end=\"3637\">\u306e <strong data-start=\"3538\" data-end=\"3563\">TST-01 \u5f15\u5f35\u8a66\u9a13\u6a5f<\/strong> from Cell Instruments is specifically suited for ASTM D4632 applications.<\/p>\n<p data-start=\"3639\" data-end=\"3659\"><strong>Key Advantages:<\/strong><\/p>\n<ul data-start=\"3660\" data-end=\"4031\">\n<li data-section-id=\"1nqeob6\" data-start=\"3660\" data-end=\"3733\"><strong data-start=\"3662\" data-end=\"3696\">PLC-controlled system with HMI<\/strong> for stable and intuitive operation<\/li>\n<li data-section-id=\"az8ybg\" data-start=\"3734\" data-end=\"3802\"><strong data-start=\"3736\" data-end=\"3766\">Precision ball screw drive<\/strong> for accurate displacement control<\/li>\n<li data-section-id=\"1jhfsem\" data-start=\"3803\" data-end=\"3868\">Adjustable speed (<strong data-start=\"3823\" data-end=\"3839\">1-500 mm\/\u5206<\/strong>) to meet ASTM requirements<\/li>\n<li data-section-id=\"1ttxcru\" data-start=\"3869\" data-end=\"3925\"><strong data-start=\"3871\" data-end=\"3898\">High accuracy (0.5% FS)<\/strong> ensures reliable results<\/li>\n<li data-section-id=\"1y9sfem\" data-start=\"3926\" data-end=\"3986\">Supports <strong data-start=\"3937\" data-end=\"3956\">custom fixtures<\/strong> for geotextile grab testing<\/li>\n<li data-section-id=\"i8sgph\" data-start=\"3987\" data-end=\"4031\">Real-time <strong data-start=\"3999\" data-end=\"4031\">load-extension curve display<\/strong><\/li>\n<\/ul>\n<p data-start=\"4033\" data-end=\"4199\">This system enables laboratories and manufacturers to achieve <strong data-start=\"4095\" data-end=\"4138\">consistent, standards-compliant testing<\/strong>, improving both <strong data-start=\"4155\" data-end=\"4198\">product quality and customer confidence<\/strong>.<\/p>\n<p data-start=\"6594\" data-end=\"7019\">Ensure accurate and standards-compliant geotextile testing with ASTM D4632. By using a reliable CRE tensile testing machine like the TST-01, you can precisely measure grab tensile strength and elongation, improve product consistency, and meet international quality requirements. Contact Cell Instruments today to optimize your material testing process with advanced, customizable solutions tailored to your application needs.<\/p>\n<hr data-start=\"5138\" data-end=\"5141\" \/>\n<h2 data-section-id=\"1qsfy1n\" data-start=\"5143\" data-end=\"5179\">\u3088\u304f\u3042\u308b\u8cea\u554f\uff08FAQ\uff09<\/h2>\n<p data-section-id=\"kok2p2\" data-start=\"5181\" data-end=\"5216\"><strong>1. What is ASTM D4632 used for?<br \/>\n<\/strong>ASTM D4632 is used to measure the <strong data-start=\"5251\" data-end=\"5303\">grab breaking load and elongation of geotextiles<\/strong>, primarily for quality control and acceptance testing.<\/p>\n<p data-section-id=\"ljaxb\" data-start=\"5360\" data-end=\"5400\"><strong>2. Why is the grab method important?<\/strong><br \/>\nThe grab method reflects <strong data-start=\"5426\" data-end=\"5449\">real-use conditions<\/strong> by allowing adjacent fibers to contribute to strength, providing a more practical performance indicator.<\/p>\n<p data-section-id=\"f2oca5\" data-start=\"5556\" data-end=\"5618\"><strong>3. Can ASTM D4632 results be used for design calculations?<br \/>\n<\/strong>No. It is an <strong data-start=\"5632\" data-end=\"5646\">index test<\/strong>, and results are best used for <strong data-start=\"5678\" data-end=\"5704\">comparative evaluation<\/strong>, not direct design.<\/p>\n<p data-section-id=\"178c6uf\" data-start=\"5726\" data-end=\"5775\"><strong>4. What equipment is required for <a href=\"https:\/\/store.astm.org\/d4632_d4632m-15ar23.html\" target=\"_blank\" rel=\"noopener nofollow\">ASTM D4632<\/a>?<br \/>\n<\/strong>\u3042 <strong data-start=\"5778\" data-end=\"5809\">CRE tensile testing machine<\/strong> with appropriate grips and controlled speed is required.<\/p>\n<p data-section-id=\"1mzr64n\" data-start=\"5868\" data-end=\"5908\"><strong>5. What causes invalid test results?<br \/>\n<\/strong>Common issues include <strong data-start=\"5931\" data-end=\"5988\">specimen slippage, edge failure, or improper clamping<\/strong>, which require retesting.<\/p>","protected":false},"excerpt":{"rendered":"<p>ASTM D4632 is a widely recognized standard test method used to determine the breaking load and elongation of geotextiles using the grab method. This method provides an index-based evaluation of fabric strength, making it highly valuable for quality control and acceptance testing. Unlike strip tensile testing, ASTM D4632 focuses on partial-width gripping, allowing adjacent fibers to contribute to the measured strength. This approach better reflects real-world application performance, especially in geotechnical engineering projects such as road stabilization, drainage systems, and erosion control. It is important to note that ASTM D4632 is not suitable for knitted fabrics, and results should only be compared among materials with similar structural characteristics. Grab Tensile &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/www.qualitester.com\/ja\/standards\/astm-d4632\/\"> <span class=\"screen-reader-text\">ASTM D4632<\/span> \u3082\u3063\u3068\u8aad\u3080 \"<\/a><\/p>","protected":false},"author":4,"featured_media":0,"parent":4948,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-global-header-display":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","footnotes":""},"class_list":["post-7899","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.qualitester.com\/ja\/wp-json\/wp\/v2\/pages\/7899","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.qualitester.com\/ja\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.qualitester.com\/ja\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.qualitester.com\/ja\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.qualitester.com\/ja\/wp-json\/wp\/v2\/comments?post=7899"}],"version-history":[{"count":0,"href":"https:\/\/www.qualitester.com\/ja\/wp-json\/wp\/v2\/pages\/7899\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/www.qualitester.com\/ja\/wp-json\/wp\/v2\/pages\/4948"}],"wp:attachment":[{"href":"https:\/\/www.qualitester.com\/ja\/wp-json\/wp\/v2\/media?parent=7899"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}