{"id":4820,"date":"2026-07-11T09:15:05","date_gmt":"2026-07-11T01:15:05","guid":{"rendered":"https:\/\/www.nlscientific.com\/asphalt-binder-extraction-test-astm-d2172\/"},"modified":"2026-07-11T09:19:56","modified_gmt":"2026-07-11T01:19:56","slug":"asphalt-binder-extraction-test-astm-d2172","status":"publish","type":"post","link":"https:\/\/www.nlscientific.com\/en_ph\/asphalt-binder-extraction-test-astm-d2172\/","title":{"rendered":"Asphalt Binder Extraction Test (ASTM D2172): Method &#038; Apparatus"},"content":{"rendered":"<p><!-- nleeat --><\/p>\n<div class=\"nl-guide-meta\" style=\"border-left:4px solid #10243e;background:#f4f7fb;padding:12px 16px;margin:0 0 20px;font-size:14px;color:#3d4c60\">Written by the <strong>NL Scientific Engineering Team<\/strong> &middot; Reviewed by our <a href=\"https:\/\/www.nlscientific.com\/en_ph\/certifications\/\">ISO\/IEC 17025 (SAMM 835) accredited<\/a> calibration laboratory &middot; Last updated <strong>11 July 2026<\/strong><\/div>\n<p>The <strong>binder extraction test<\/strong> determines the bitumen content of an asphalt mixture \u2014 the core QC check that plant-produced mix matches the job mix formula (JMF), with the recovered aggregate then available for gradation testing.<\/p>\n<h2>What the Test Measures<\/h2>\n<p>A weighed sample of loose or broken-down mix is washed with solvent in a centrifuge extractor until the binder dissolves and drains. Binder content is the mass loss corrected for fines carried into the extract, expressed as a percentage of mix or aggregate mass.<\/p>\n<h2>Apparatus Required<\/h2>\n<ul>\n<li>Centrifuge extractor (typically 1500 g or 3000 g bowl) with filter rings<\/li>\n<li>Approved solvent (trichloroethylene or n-propyl bromide alternatives; follow local HSE rules)<\/li>\n<li>Balance (0.1 g), oven, and ashing furnace or centrifuge for fines correction of the extract<\/li>\n<li>Sample splitter and heating tray to break down the mix<\/li>\n<\/ul>\n<h2>Test Procedure<\/h2>\n<ol>\n<li>Warm the mix just enough to separate; weigh about 1&ndash;1.5 kg into the extractor bowl.<\/li>\n<li>Cover with solvent, soak up to 1 h, fit the filter ring and lid.<\/li>\n<li>Spin at increasing speed, draining the extract; add fresh solvent and repeat until the effluent runs light straw colour (usually 3&ndash;6 washes).<\/li>\n<li>Dry and weigh the extracted aggregate and filter ring; determine fines in the total extract and add back.<\/li>\n<\/ol>\n<h2>Calculation &amp; Reporting<\/h2>\n<p>Binder content % = (initial mass &minus; aggregate mass &minus; extract fines) \/ initial mass &times; 100. Report with moisture correction if the mix was sampled hot from the plant, and attach the recovered-aggregate grading.<\/p>\n<h2>Acceptance Criteria<\/h2>\n<p>Plant mix normally must sit within &plusmn;0.3% of the JMF binder content; recovered grading within JMF tolerances per sieve (commonly &plusmn;4&ndash;5% mid sieves, &plusmn;2% on 75 &micro;m). Repeated low binder results indicate plant metering drift \u2014 flag immediately.<\/p>\n<h2>Frequently Asked Questions<\/h2>\n<h3>Ignition oven or solvent extraction?<\/h3>\n<p>The ignition method (ASTM D6307) avoids solvents and is faster, but needs a mix-specific correction factor and alters some aggregates. Solvent extraction remains the referee method and preserves aggregate for grading.<\/p>\n<h3>How is the fines correction determined?<\/h3>\n<p>Either ash a measured aliquot of the extract or centrifuge the full extract and weigh the recovered mineral matter. Skipping this correction understates aggregate mass and overstates binder content.<\/p>\n<h2>Recommended Apparatus<\/h2>\n<p>NL Scientific manufactures the <a href=\"https:\/\/www.nlscientific.com\/en_ph\/product\/eco-smartz-centrifuge-extractor-apparatus\/\">ECO-SMARTZ Centrifuge Extractor Apparatus<\/a> for this method. Browse the full <a href=\"https:\/\/www.nlscientific.com\/en_ph\/product-category\/bitumen-asphalt\/\">Bitumen &#038; Asphalt Testing Equipment<\/a> range or <a href=\"https:\/\/www.nlscientific.com\/en_ph\/contact-us\/\">request a quotation<\/a> from our engineers.<\/p>\n<p><!-- nlfaq --><br \/>\n<script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Ignition oven or solvent extraction?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The ignition method (ASTM D6307) avoids solvents and is faster, but needs a mix-specific correction factor and alters some aggregates. Solvent extraction remains the referee method and preserves aggregate for grading.\"}}, {\"@type\": \"Question\", \"name\": \"How is the fines correction determined?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Either ash a measured aliquot of the extract or centrifuge the full extract and weigh the recovered mineral matter. Skipping this correction understates aggregate mass and overstates binder content.\"}}]}<\/script><\/p>","protected":false},"excerpt":{"rendered":"<p>Written by the NL Scientific Engineering Team &middot; Reviewed by our ISO\/IEC 17025 (SAMM 835) accredited calibration laboratory &middot; Last updated 11 July 2026 The binder extraction test determines the&hellip;<\/p>","protected":false},"author":1,"featured_media":3767,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[179,164],"tags":[],"class_list":["post-4820","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bitumen-asphalt-testing","category-blog"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.nlscientific.com\/en_ph\/wp-json\/wp\/v2\/posts\/4820","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nlscientific.com\/en_ph\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nlscientific.com\/en_ph\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nlscientific.com\/en_ph\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nlscientific.com\/en_ph\/wp-json\/wp\/v2\/comments?post=4820"}],"version-history":[{"count":2,"href":"https:\/\/www.nlscientific.com\/en_ph\/wp-json\/wp\/v2\/posts\/4820\/revisions"}],"predecessor-version":[{"id":4839,"href":"https:\/\/www.nlscientific.com\/en_ph\/wp-json\/wp\/v2\/posts\/4820\/revisions\/4839"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nlscientific.com\/en_ph\/wp-json\/wp\/v2\/media\/3767"}],"wp:attachment":[{"href":"https:\/\/www.nlscientific.com\/en_ph\/wp-json\/wp\/v2\/media?parent=4820"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nlscientific.com\/en_ph\/wp-json\/wp\/v2\/categories?post=4820"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nlscientific.com\/en_ph\/wp-json\/wp\/v2\/tags?post=4820"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}