{"id":36263,"date":"2026-02-20T13:18:02","date_gmt":"2026-02-20T13:18:02","guid":{"rendered":"https:\/\/cortartec.net\/produto\/elementos-para-ferrovias\/"},"modified":"2026-05-13T14:31:54","modified_gmt":"2026-05-13T14:31:54","slug":"railway-components","status":"publish","type":"product","link":"https:\/\/cortartec.net\/en\/produto\/railway-components\/","title":{"rendered":"Railway Components"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_row][vc_column][vc_column_text css=&#8221;&#8221; woodmart_inline=&#8221;no&#8221; text_larger=&#8221;no&#8221;]Our resilient railway components can be grouped into three categories based on their application on railway tracks.<\/p>\n<p>a) UNDER-BALLAST MATS <i>(UBM <\/i><i>\u2013 <\/i><i>Under-Ballast <\/i><i>Mats <\/i><i>and SBM &#8211; Sub-Ballast Mats) are used <\/i><i>in the <\/i><i>ballast <\/i><i>bed <\/i><i>of the <\/i><i>track <\/i><i>and <\/i><i>come in <\/i><i>two variants depending on <\/i><i>their <\/i><i>purpose:<\/i><\/p>\n<ul>\n<li><i>As primary insulation <\/i><i>against<\/i> <i>vibration<\/i><\/li>\n<li><i>As a <\/i><i>stress<\/i> <i>reducer<\/i> <i>in the<\/i> <i>ballast<\/i> <i>box<\/i> <i>of the<\/i><i>track<\/i><\/li>\n<\/ul>\n<p><b>b) <\/b>TRACK SLAB MATS <i>(STM <\/i><i>\u2013 <\/i><i>Slab <\/i><i>Track <\/i><i>Mats) are used <\/i><i>on <\/i><i>tracks without a <\/i><i>ballast <\/i><i>box, and are installed underneath and\/or <\/i><i>on the <\/i><i>sides <\/i><i>of the <\/i><i>slab <\/i><i>on which <\/i><i>the <\/i><i>track <\/i><i>is laid<\/i><\/p>\n<p><b>c) <\/b>LOWER SUPPORTS FOR SLEEPERS <i>(UTP <\/i><i> \u2013 <\/i><i>Under Sleeper Pads) must be connected <\/i><i>to <\/i><i>all <\/i><i>sleepers to ensure <\/i><i>the <\/i><i>sleeper connection <\/i><i>to the <\/i><i> This precaution increases &lt;\/ i&gt;<i>the <\/i><i>performance <\/i><i>of the <\/i><i>track <\/i><i>system, <\/i><i>reducing <\/i><i>compaction stresses <\/i><i>and thereby increasing <\/i><i>the <\/i><i>service life of the components. <\/i><i>It must<\/i> <i>be incorporated into the base <\/i><i>of the <\/i><i>rails <\/i><i>during <\/i><i>their installation process &lt;\/<\/i><\/i><\/p>\n<p><b>c) <\/b>LOWER SUPPORTS FOR CROSSBEAMS <i>(UTP <\/i><i> \u2013 <\/i><i>Under Sleeper Pads) must be connected <\/i><i>to <\/i><i>all <\/i><i>sleepers to ensure <\/i><i>the <\/i><i>sleeper connection <\/i><i>to <\/i><i> This precaution increases &lt;\/ i&gt;<i>the <\/i><i>performance <\/i><i>of the <\/i><i>rail <\/i><i>system, <\/i><i>reducing <\/i><i>compaction <\/i><i>stresses, <\/i><i>thereby increasing <\/i><i>the <\/i><i>service life of the <\/i><i>components. <\/i><i>It must<\/i> <i>be incorporated into the base <\/i><i>of the <\/i><i>rails <\/i><i>during the <\/i><i>prefabrication <\/i><i>process<\/i> <i><\/i>[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=&#8221;1\/4&#8243;][vc_single_image image=&#8221;37339&#8243; img_size=&#8221;full&#8221; alignment=&#8221;center&#8221; css=&#8221;&#8221; parallax_scroll=&#8221;no&#8221; woodmart_inline=&#8221;no&#8221;][\/vc_column][vc_column width=&#8221;3\/4&#8243;]\t\t<div id=\"wd-6a048ab742fb0\" class=\"wd-text-block wd-wpb reset-last-child wd-rs-6a048ab742fb0 text-left \">\r\n\t\t\t<p><\/i><\/p>\n<h2>Materials and Their Properties<\/h2>\n<div class=\" vc_custom_1690551618548\">\n<div id=\"text-block-13\" class=\"mk-text-block \">\n<p>Our systems are made from recycled rubber from used truck tires combined with polyurethane elastomer. The entire process of collection, shredding, and production is thoroughly controlled. The use of recycled material results in energy savings and prevents pollution. For every square meter of anti-vibration mat, two medium-sized tires are recycled.<\/p>\n<p>The most relevant technical characteristics of the resilient elements, which are most important for their function, are:<\/p>\n<ul>\n<li>Effective vibration isolation \u2013 maximum reduction of impact and vibration levels in the structure and of noise<\/li>\n<li>Extended service life \u2013 maintaining the characteristics mentioned above over the long term under actual operating conditions, with minimal deviation from the parameters obtained in laboratory fatigue tests under extreme operating conditions<\/li>\n<\/ul>\n<p>The above requirements are the most important parameters for achieving a high-quality resilient track mat and can be determined during its operation (vibration isolation, service life, material characteristics according to specific operating conditions). In the case of vibration isolation, these are:<\/p>\n<ul>\n<li>Static and dynamic vertical stiffness, static and dynamic vertical modulus of elasticity<\/li>\n<li>Static horizontal stiffness and horizontal modulus of compression<br \/>\nThe above requirements are the most important parameters for achieving a high-quality resilient track mat and can be determined based on its intended function (vibration isolation, service life, material characteristics according to specific conditions of use). In the case of vibration isolation, these are:<\/p>\n<ul>\n<li>Static and dynamic vertical stiffness, static and dynamic vertical stiffness modulus<\/li>\n<li>Static horizontal stiffness and static horizontal compression modulus.<\/li>\n<li>The loss factor \u014b defined by the ratio of dissipated energy to absorbed energy<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\t\t<\/div>\r\n\t\t[\/vc_column][\/vc_row][vc_row][vc_column width=&#8221;1\/4&#8243;][vc_single_image image=&#8221;37340&#8243; img_size=&#8221;full&#8221; alignment=&#8221;center&#8221; css=&#8221;&#8221; parallax_scroll=&#8221;no&#8221; woodmart_inline=&#8221;no&#8221;][\/vc_column][vc_column width=&#8221;3\/4&#8243;]\t\t<div id=\"wd-6a048ad3b7250\" class=\"wd-text-block wd-wpb reset-last-child wd-rs-6a048ad3b7250 text-left \">\r\n\t\t\t<h2>UNDER-BALLAST RESILIENT MATS<\/h2>\n<h2><i>(<\/i><b><i>UBM <\/i><\/b><i>\u2013 <\/i><i>Under- <\/i><i>Ballast <\/i><i>Mats and <\/i><b><i>SBM- <\/i><\/b><i>Sub-Ballast<\/i> <i>Mats)<\/i><\/h2>\n<div class=\" vc_custom_1691405505836\">\n<div id=\"text-block-19\" class=\"mk-text-block \">\n<p>Resilient mats installed under the ballast mitigate dynamic loads, vibration, and noise, and also protect the ballast from disintegration. However, their main purpose is to reduce track stiffness, especially when installed in the stiffest sections, such as bridges, tunnels, overpasses, etc. In addition, they can be used in various operational environments, such as conventional main lines, urban or high-speed lines, or light rail and subway tracks.<\/p>\n<p>The resilient mat applied beneath the ballast is manufactured in thicknesses ranging from 15 to 30 mm. Its types can be classified as HARD, MEDIUM, or SOFT depending on the dynamic compression modulus, according to the values in the following table.<\/p>\n<\/div>\n<\/div>\n\t\t<\/div>\r\n\t\t[\/vc_column][\/vc_row][vc_row][vc_column][vc_single_image image=&#8221;37341&#8243; img_size=&#8221;full&#8221; alignment=&#8221;center&#8221; css=&#8221;&#8221; parallax_scroll=&#8221;no&#8221; woodmart_inline=&#8221;no&#8221;]\t\t<div id=\"wd-6a048add69ec2\" class=\"wd-text-block wd-wpb reset-last-child wd-rs-6a048add69ec2 text-left \">\r\n\t\t\t<h3 style=\"text-align: center;\">Installation Requirements<\/h3>\n\t\t<\/div>\r\n\t\t[vc_single_image image=&#8221;37342&#8243; img_size=&#8221;full&#8221; alignment=&#8221;center&#8221; css=&#8221;&#8221; parallax_scroll=&#8221;no&#8221; woodmart_inline=&#8221;no&#8221;][\/vc_column][\/vc_row][vc_row][vc_column]\t\t<div id=\"wd-6a048ae4b9b29\" class=\"wd-text-block wd-wpb reset-last-child wd-rs-6a048ae4b9b29 text-left \">\r\n\t\t\t<p>To avoid any risk of ballast flow, it is highly recommended that the ballast side supports<img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-14277 alignright\" src=\"https:\/\/cortartec.net\/wp-content\/uploads\/2023\/08\/condicoesdeinstalacaomantas-170x300.png\" sizes=\"auto, \u201c(max-width:\" srcset=\"https:\/\/cortartec.net\/wp-content\/uploads\/2023\/08\/condicoesdeinstalacaomantas-170x300.png 170w, https:\/\/cortartec.net\/wp-content\/uploads\/2023\/08\/condicoesdeinstalacaomantas-580x1024.png 580w, https:\/\/cortartec.net\/wp-content\/uploads\/2023\/08\/condicoesdeinstalacaomantas.png 674w\" alt=\"\u201c\u201d\" width=\"170\" height=\"300\" \/> should be installed when UBMs are used where the ballast box profile is open on the sides (i.e., where the ballast is not retained); this is common in the case of open tracks adjacent to embankments.<\/p>\n<p>To prevent any slippage of the UBM during installation or during ballast cleaning, it is recommended that the UBM be bonded to the substructure. To ensure compatibility of the adhesive with the UBM material and type of substructure, the use of PU resins is recommended.<\/p>\n<p>The substructure on which the UBM is installed must be flat and clean (e.g., asphalt layer, concrete layer) to prevent additional elasticity and ensure suitability for bonding.<\/p>\n<p>In cases of high-performance structural noise or vibration reduction in tunnels, bridges, and ballast boxes, the UBM should be installed on the side walls, kept below the top surface of the ballast for practical reasons<\/p>\n<p>The substrate on which the UBM is installed must be flat and clean (e.g., asphalt layer, concrete layer) to prevent additional elasticity and ensure suitability for bonding.<\/p>\n<p>In cases requiring high-performance structural noise control or vibration reduction in tunnels, bridges, and ballast boxes, the UBM must be installed on the side walls, maintained below the top surface of the ballast for practical reasons (e.g., for fire protection and equipment clearance).<\/p>\n<p>The mats should be installed in such a way that drainage of the substructure is not affected.<\/p>\n<p>To prevent direct contact between the ballast and the substructure, there should be an overlap between adjacent sections of the UBM. In tunnels, it is recommended that the UBM be installed on the sidewall to maximize the UBM\u2019s effect against vibrations. However, for fire safety, the top level of the UBM must be kept below the top surface of the ballast.<\/p>\n\t\t<\/div>\r\n\t\t[\/vc_column][\/vc_row][vc_row][vc_column]\t\t<div id=\"wd-6a048afdb8f40\" class=\"wd-text-block wd-wpb reset-last-child wd-rs-6a048afdb8f40 text-left \">\r\n\t\t\t<h2>Limitations<\/h2>\n<h3><b>A) <\/b><b>UBM <\/b><b>\u2013 <\/b><b>Lower resilient mats and destabilization <\/b><b>of the ballast.<\/b><b><\/b><\/h3>\n<p>The influence of the modulus of resilient mats placed beneath the ballast on track stability must be considered in relation to the track\u2019s natural frequency, subgrade quality, and excessive vertical deflections of the track.<\/p>\n<p>The natural frequency of the track decreases as the layer modulus decreases.<\/p>\n<p>In the case of relatively high layer modulus values, the additional vertical deflections of the track due to the use of UBM should not be the cause of such phenomena.<\/p>\n<p>In the case of UBM with a relatively low stratification modulus, there is a risk of ballast destabilization, especially at high train speeds. Therefore, limiting the dynamic flexibility of the UBM is a good way to prevent this phenomenon. Very soft and soft UBM should be avoided for high-speed tracks.<\/p>\n\t\t<\/div>\r\n\t\t[vc_single_image image=&#8221;37343&#8243; img_size=&#8221;full&#8221; alignment=&#8221;center&#8221; css=&#8221;&#8221; parallax_scroll=&#8221;no&#8221; woodmart_inline=&#8221;no&#8221;]\t\t<div id=\"wd-6a048b072b7f4\" class=\"wd-text-block wd-wpb reset-last-child wd-rs-6a048b072b7f4 text-left \">\r\n\t\t\t<h3>B)<b>Possibility <\/b><b>of combining the use of UBM with<\/b> <b>USP.<\/b><\/h3>\n<p>It is important to note that combining these two systems affects the overall flexibility of the track and its dynamic behavior, and may affect ballast stability in unpredictable ways. This combined use of two systems does not directly translate to the sum of the individual advantages offered by each system. Therefore, it is recommended not to combine them unless additional investigations have been conducted for specific projects<\/p>\n<h3>C)<b>UBM and braking forces<\/b> <b>.<\/b><\/h3>\n<p>The influence of longitudinal forces acting on the rails on the UBM\u2019s shear modulus is negligible: no significant additional deformation is produced in the track during braking due to the presence of the UBM. In contrast to the case of the nose, braking forces would not in themselves imply a significant limitation on the UBM\u2019s shear modulus<\/p>\n\t\t<\/div>\r\n\t\t[\/vc_column][\/vc_row][vc_row][vc_column width=&#8221;1\/4&#8243;][vc_single_image image=&#8221;37344&#8243; img_size=&#8221;full&#8221; alignment=&#8221;center&#8221; css=&#8221;&#8221; parallax_scroll=&#8221;no&#8221; woodmart_inline=&#8221;no&#8221;][\/vc_column][vc_column width=&#8221;3\/4&#8243;]\t\t<div id=\"wd-6a048b1176ab6\" class=\"wd-text-block wd-wpb reset-last-child wd-rs-6a048b1176ab6 text-left \">\r\n\t\t\t<h2>RESILIENT MATS FOR TRACK SLABS<\/h2>\n<h3><b><i>(STM \u2013 <\/i><\/b><b><i>Slab Track<\/i><\/b> <b><i>Mats)<\/i><\/b><\/h3>\n<div class=\" vc_custom_1691414383060\">\n<div id=\"text-block-25\" class=\"mk-text-block \">\n<p>In ballastless track systems, resilient mats serve a similar purpose to mats under ballast. However, a ballastless track system is always a custom engineering solution for a specific application. Therefore, in accordance with DIN-45673-7 and EN 17686, mats must be tested for each project according to the specifications of that project:<\/p>\n<ul>\n<li>F0 Minimum load<\/li>\n<li>F1 Service load Evaluation load<\/li>\n<li>F2 Load assessment in slab calculation<\/li>\n<li>F3 Maximum load on the slab<\/li>\n<\/ul>\n<p>Before testing, a simulation of the insertion loss can be performed to select the most suitable material for each project<\/p>\n<\/div>\n<\/div>\n\t\t<\/div>\r\n\t\t[vc_single_image image=&#8221;37345&#8243; img_size=&#8221;full&#8221; css=&#8221;&#8221; parallax_scroll=&#8221;no&#8221; woodmart_inline=&#8221;no&#8221;][vc_single_image image=&#8221;37346&#8243; img_size=&#8221;full&#8221; css=&#8221;&#8221; parallax_scroll=&#8221;no&#8221; woodmart_inline=&#8221;no&#8221;][\/vc_column][\/vc_row][vc_row][vc_column width=&#8221;1\/4&#8243;][vc_single_image image=&#8221;37347&#8243; img_size=&#8221;full&#8221; alignment=&#8221;center&#8221; css=&#8221;&#8221; parallax_scroll=&#8221;no&#8221; woodmart_inline=&#8221;no&#8221;][\/vc_column][vc_column width=&#8221;3\/4&#8243;]\t\t<div id=\"wd-6a048b1bb3fd0\" class=\"wd-text-block wd-wpb reset-last-child wd-rs-6a048b1bb3fd0 text-left \">\r\n\t\t\t<h2>RESILIENT SUPPORTS FOR RAIL SLEEPERS<\/h2>\n<h3><b><i>(USP <\/i><\/b><b><i>\u2013 <\/i><\/b><i>Under Sleeper<\/i> <i>Pads<\/i><b><i>)<\/i><\/b><\/h3>\n<div class=\" vc_custom_1691414946760\">\n<div id=\"text-block-31\" class=\"mk-text-block \">\n<p>Resilient supports for railway sleeper bases (USP) are installed beneath the bases to distribute axle loads across a large number of sleepers. USPs generally serve two purposes: to dampen vibration and to protect the sleepers from the impact load transmitted through the ballast. USPs can increase the contact surface between sleepers and ballast, which helps stabilize the top layer of ballast. Furthermore, one of the greatest benefits of USPs is reducing the dynamic load on the ballast, which leads to a reduction in ballast displacement and track settlement.<\/p>\n<p><b>The <\/b><b>benefits <\/b><b>of <\/b><b>using <\/b><b>USP <\/b><b>supports presented <\/b><b>are <\/b><b>shown <\/b><b>below:<\/b><\/p>\n<ul>\n<li>Improves track quality by reducing dynamic load<\/li>\n<li>Reduces ballast thickness without compromising performance<\/li>\n<\/ul>\n<ul>\n<li>Reduces ground vibration frequency above 50 Hz<\/li>\n<li>Reduces long-wave undulation in sharp curves of the track, as USP can modify the natural frequencies of track components.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\t\t<\/div>\r\n\t\t[vc_single_image image=&#8221;37348&#8243; img_size=&#8221;full&#8221; css=&#8221;&#8221; parallax_scroll=&#8221;no&#8221; woodmart_inline=&#8221;no&#8221;][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p><span style=\"color: #e46106;\"><strong><a style=\"color: #e46106;\" href=\"https:\/\/cortartec.net\/wp-content\/uploads\/2022\/04\/cortartec-sistema-de-fachadas-ventiladas-gk-pt.pdf\" target=\u201c_blank\u201d rel=\"noopener\">Technical Data Sheet<\/a><\/strong><\/span><br \/>\n<span style=\"color: #e46106;\"><strong><a style=\"color: #e46106;\" href=\"\"#>DWG<\/a><\/strong><\/span><\/p>\n","protected":false},"featured_media":36264,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[315],"product_tag":[],"class_list":["post-36263","product","type-product","status-publish","has-post-thumbnail","product_cat-expansion-joints","first","instock","shipping-taxable","product-type-simple"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - 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