{"id":11937,"date":"2026-09-04T19:50:01","date_gmt":"2026-09-04T19:50:01","guid":{"rendered":"https:\/\/spico.org\/?post_type=portfolio&#038;p=11937"},"modified":"2026-11-03T20:37:50","modified_gmt":"2026-11-03T20:37:50","slug":"viscosity-grade-vg-bitumen","status":"publish","type":"portfolio","link":"https:\/\/spico.org\/en\/products\/viscosity-grade-vg-bitumen\/","title":{"rendered":"Viscosity Grade (VG) bitumen"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"11937\" class=\"elementor elementor-11937 elementor-11589\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-7d9957a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7d9957a\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-c539974 column-xtra-sticky\" data-id=\"c539974\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6498178 elementor-widget elementor-widget-text-editor\" data-id=\"6498178\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"color: #000000;\"><strong>Viscosity Grade (VG) bitumen<\/strong> is a classification system that grades bitumen based on its <strong>viscosity<\/strong> \u2014 a direct measure of how resistant it is to flow \u2014 rather than the older penetration-depth method.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-top-column elementor-element elementor-element-f6627a0\" data-id=\"f6627a0\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-40c3135 elementor-widget elementor-widget-image\" data-id=\"40c3135\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"512\" src=\"https:\/\/spico.org\/wp-content\/uploads\/2026\/09\/Product-Viscosity-Grade-00.jpg\" class=\"attachment-large size-large wp-image-11917\" alt=\"Product Viscosity Grade 00\" srcset=\"https:\/\/spico.org\/wp-content\/uploads\/2026\/09\/Product-Viscosity-Grade-00.jpg 768w, https:\/\/spico.org\/wp-content\/uploads\/2026\/09\/Product-Viscosity-Grade-00-300x200.jpg 300w, https:\/\/spico.org\/wp-content\/uploads\/2026\/09\/Product-Viscosity-Grade-00-600x400.jpg 600w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-06bd437 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"06bd437\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-b7be866\" data-id=\"b7be866\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-42f1b06 elementor-widget elementor-widget-cz_title\" data-id=\"42f1b06\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"cz_title.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\r\n\t\t<div>\r\n\t\t\t<div class=\"cz_title clr cz_mobile_text_center cz_title_pos_inline\"><div class=\"cz_title_content\"><span class=\"cz_line_side_solo\">_<\/span><div class=\"cz_wpe_content\"><h2><span style=\"color: #a06616; font-size: 22px;\">Description<\/span><\/h2><\/div><\/div><\/div>\r\n\t\t<\/div>\r\n\t\t\r\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8ee7355 elementor-widget elementor-widget-text-editor\" data-id=\"8ee7355\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"color: #000000;\">Developed in the early 1960s as a more scientific alternative to penetration grading, the VG system tests bitumen at two temperatures that closely mirror real-world conditions:<\/span><\/p><ul><li><span style=\"color: #000000;\"><strong>60\u00b0C \u00b1 0.3\u00b0C<\/strong> \u2014 representing the average road surface temperature in direct sunshine<\/span><\/li><li><span style=\"color: #000000;\"><strong>135\u00b0C<\/strong> \u2014 representing the average temperature of bitumen during asphalt mixing<\/span><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-ff1d246 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ff1d246\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-9cc07f8\" data-id=\"9cc07f8\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-738bc4c elementor-widget elementor-widget-cz_title\" data-id=\"738bc4c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"cz_title.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\r\n\t\t<div>\r\n\t\t\t<div class=\"cz_title clr cz_mobile_text_center cz_title_pos_inline\"><div class=\"cz_title_content\"><span class=\"cz_line_side_solo\">_<\/span><div class=\"cz_wpe_content\"><h2><span style=\"font-size: 22px;\">The Core<span style=\"color: #a06616;\"> Principle<\/span><strong>\u00a0<\/strong><\/span><\/h2><\/div><\/div><\/div>\r\n\t\t<\/div>\r\n\t\t\r\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3f87b53 elementor-widget elementor-widget-text-editor\" data-id=\"3f87b53\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"color: #000000;\">Viscosity and penetration move in opposite directions: the <strong>higher the viscosity, the lower the penetration<\/strong>, and vice versa. This relationship is the foundation for how VG grades are matched to climate:<\/span><\/p><ul><li><span style=\"color: #000000;\"><strong>Hot climates<\/strong> call for bitumen with <strong>low penetration and high viscosity<\/strong> (e.g., VG40) \u2014 thick enough that it won&#8217;t flow or deform under intense heat and heavy traffic loads.<\/span><\/li><li><span style=\"color: #000000;\"><strong>Cold climates<\/strong> call for bitumen with <strong>high penetration and low viscosity<\/strong> (e.g., VG10) \u2014 flexible enough that it won&#8217;t crack or become brittle under freezing temperatures.<\/span><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t<div class=\"elementor-element elementor-element-27d2a03 e-con e-atomic-element e-flexbox-base e-default-div e-15d3226 \" data-id=\"27d2a03\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"27d2a03\">\n    \t\t<div class=\"elementor-element elementor-element-ad4de14 elementor-widget elementor-widget-html\" data-id=\"ad4de14\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div style=\"overflow-x:auto;font-family:\"Verdana\";>\n<table>\n    <thead>\n        <tr>\n            <th>Test<\/th>\n            <th>Unit<\/th>\n            <th>VG-10<\/th>\n            <th>VG-20<\/th>\n            <th>VG-30<\/th>\n            <th>VG-40<\/th>\n        <\/tr>\n    <\/thead>\n    <tbody>\n        <tr>\n            <td>Dynamic viscosity @60\u00b0C<\/td>\n            <td>poise<\/td>\n            <td>1000\u00b1200<\/td>\n            <td>2000\u00b1400<\/td>\n            <td>3000\u00b1600<\/td>\n            <td>4000\u00b1800<\/td>\n        <\/tr>\n        <tr>\n            <td>Kinematic Viscosity @135\u00b0C, min<\/td>\n            <td>cSt<\/td>\n            <td>250<\/td>\n            <td>300<\/td>\n            <td>350<\/td>\n            <td>400<\/td>\n        <\/tr>\n        <tr>\n            <td>Penetration @25\u00b0C<\/td>\n            <td>0.1 mm<\/td>\n            <td>80<\/td>\n            <td>60<\/td>\n            <td>45<\/td>\n            <td>35<\/td>\n        <\/tr>\n        <tr>\n            <td>Flash Point, min<\/td>\n            <td>\u00b0C<\/td>\n            <td>220<\/td>\n            <td>220<\/td>\n            <td>220<\/td>\n            <td>220<\/td>\n        <\/tr>\n        <tr>\n            <td>Softening Point, min<\/td>\n            <td>\u00b0C<\/td>\n            <td>40<\/td>\n            <td>45<\/td>\n            <td>47<\/td>\n            <td>50<\/td>\n        <\/tr>\n        <tr>\n            <td>Solubility in trichloroethylene, min<\/td>\n            <td>%<\/td>\n            <td>99<\/td>\n            <td>99<\/td>\n            <td>99<\/td>\n            <td>99<\/td>\n        <\/tr>\n        <tr>\n            <td>Ductility @25\u00b0C, min<\/td>\n            <td>cm<\/td>\n            <td>75<\/td>\n            <td>50<\/td>\n            <td>40<\/td>\n            <td>25<\/td>\n        <\/tr>\n        <tr>\n            <td>Test on residue from thin film oven test<\/td>\n            <td>-<\/td>\n            <td>-<\/td>\n            <td>-<\/td>\n            <td>-<\/td>\n            <td>-<\/td>\n        <\/tr>\n        <tr>\n            <td>Viscosity ratio @60\u00b0C<\/td>\n            <td>-<\/td>\n            <td>4<\/td>\n            <td>4<\/td>\n            <td>4<\/td>\n            <td>4<\/td>\n        <\/tr>\n    <\/tbody>\n<\/table>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\n<\/div>\n\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-ae7314d elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ae7314d\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-3a6df72\" data-id=\"3a6df72\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-95ef865 elementor-widget elementor-widget-cz_title\" data-id=\"95ef865\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"cz_title.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\r\n\t\t<div>\r\n\t\t\t<div class=\"cz_title clr cz_mobile_text_center cz_title_pos_inline\"><div class=\"cz_title_content\"><span class=\"cz_line_side_solo\">_<\/span><div class=\"cz_wpe_content\"><h2><span style=\"font-size: 22px;\"><span style=\"color: #a06616;\"><strong>\u00a0Common Grades <\/strong><\/span><strong>and Applications<\/strong><\/span><\/h2><\/div><\/div><\/div>\r\n\t\t<\/div>\r\n\t\t\r\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f2b1bc0 elementor-widget elementor-widget-text-editor\" data-id=\"f2b1bc0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p style=\"text-align: left;\"><span style=\"color: #000000;\">The table below presents the different VG grades of bitumen and their respective applications.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t<div class=\"elementor-element elementor-element-a68fb40 e-con e-atomic-element e-flexbox-base e-default-div e-1b73ea8 \" data-id=\"a68fb40\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"a68fb40\">\n    \t\t<div class=\"elementor-element elementor-element-1e96ebd elementor-widget elementor-widget-html\" data-id=\"1e96ebd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div style=\"overflow-x:auto;\">\n<table>\n    <thead>\n        <tr>\n            <th>Bitumen Grade<\/th>\n            <th>Viscosity<\/th>\n            <th>Applications<\/th>\n        <\/tr>\n    <\/thead>\n    <tbody>\n        <tr>\n            <td>VG-10<\/td>\n            <td>Lowest<\/td>\n            <td>Cold \/ mountainous regions \u2013 low viscosity and high wetting capability<\/td>\n        <\/tr>\n        <tr>\n            <td>VG-20<\/td>\n            <td>Low to medium<\/td>\n            <td>Temperate climates and lighter traffic conditions<\/td>\n        <\/tr>\n        <tr>\n            <td>VG-30<\/td>\n            <td>Medium<\/td>\n            <td>Most widely used grade \u2013 general asphalt paving, national and provincial highways, and balanced performance across most climates<\/td>\n        <\/tr>\n        <tr>\n            <td>VG-40<\/td>\n            <td>Highest<\/td>\n            <td>Hot climates and heavy-traffic areas \u2013 intersections, toll plazas, and truck parking areas; strong resistance to rutting and deformation<\/td>\n        <\/tr>\n    <\/tbody>\n<\/table>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\n<\/div>\n\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Viscosity Grade (VG) bitumen is a classification system that grades bitumen &#8230; <a class=\"cz_readmore cz_readmore_no_icon\" href=\"https:\/\/spico.org\/en\/products\/viscosity-grade-vg-bitumen\/\"><span>\u0627\u062f\u0627\u0645\u0647 \u0645\u0637\u0644\u0628<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":11917,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":[],"portfolio_cat":[],"portfolio_tags":[],"class_list":["post-11937","portfolio","type-portfolio","status-publish","format-standard","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/spico.org\/en\/wp-json\/wp\/v2\/portfolio\/11937","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spico.org\/en\/wp-json\/wp\/v2\/portfolio"}],"about":[{"href":"https:\/\/spico.org\/en\/wp-json\/wp\/v2\/types\/portfolio"}],"author":[{"embeddable":true,"href":"https:\/\/spico.org\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/spico.org\/en\/wp-json\/wp\/v2\/comments?post=11937"}],"version-history":[{"count":49,"href":"https:\/\/spico.org\/en\/wp-json\/wp\/v2\/portfolio\/11937\/revisions"}],"predecessor-version":[{"id":13307,"href":"https:\/\/spico.org\/en\/wp-json\/wp\/v2\/portfolio\/11937\/revisions\/13307"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/spico.org\/en\/wp-json\/wp\/v2\/media\/11917"}],"wp:attachment":[{"href":"https:\/\/spico.org\/en\/wp-json\/wp\/v2\/media?parent=11937"}],"wp:term":[{"taxonomy":"portfolio_cat","embeddable":true,"href":"https:\/\/spico.org\/en\/wp-json\/wp\/v2\/portfolio_cat?post=11937"},{"taxonomy":"portfolio_tags","embeddable":true,"href":"https:\/\/spico.org\/en\/wp-json\/wp\/v2\/portfolio_tags?post=11937"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}