{"id":5322,"date":"2016-02-29T20:34:24","date_gmt":"2016-02-29T20:34:24","guid":{"rendered":"http:\/\/gabion1.com.au\/?page_id=5322"},"modified":"2016-06-17T00:00:27","modified_gmt":"2016-06-17T00:00:27","slug":"gabion-life-expectancy","status":"publish","type":"page","link":"https:\/\/www.gabion1.com.au\/gabion-life-expectancy\/","title":{"rendered":"Gabion Basket Design Life Chart"},"content":{"rendered":"<div class=\"flex_column av_one_full  flex_column_div first  avia-builder-el-0  el_before_av_one_third  avia-builder-el-first  \" ><div class='avia-image-container  av-styling-    avia-builder-el-1  avia-builder-el-no-sibling  avia-align-center '  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"  ><div class='avia-image-container-inner'><div class='avia-image-overlay-wrap'><img class='avia_image' src='https:\/\/www.gabion1.com.au\/wp-content\/uploads\/2016\/02\/gabion-life-span-1030x522.jpg' alt='gabion life span' title='gabion-life-span' height=\"522\" width=\"1030\"  itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div><\/div>\n<div class=\"flex_column av_one_third  flex_column_div first  avia-builder-el-2  el_after_av_one_full  el_before_av_two_third  column-top-margin\" ><section class=\"av_textblock_section \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock  '   itemprop=\"text\" ><h4>Galfan lasts 2-3 times longer than galv<\/h4>\n<p>Gafan coating of 275grams\/m2 (ZGF 275 spec)<br \/>\nGalfan is 95% Zinc 5% Aluminium and lasts 2-3 times longer than Galv which is 100% Zinc<\/p>\n<\/div><\/section><br \/>\n<section class=\"av_textblock_section \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock  '   itemprop=\"text\" ><h4>Expected Life Expectancy<\/h4>\n<p>Time to first maintenance or DBR, is defined as the time to 5% rusting of the steel surface.<br \/>\nThe gabion structure at 5% rust still holds the rocks in place, so is still structurally sound, for many years after 5%DBR (Dark brown rust) stage.<\/p>\n<\/div><\/section><br \/>\n<section class=\"av_textblock_section \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock  '   itemprop=\"text\" ><h4>Good drainage.<\/h4>\n<p>Good drainage behind and below your gabion retaining wall will not only improve the retaining walls stability, it will also increase the expected design life of the gabion wall<\/p>\n<\/div><\/section><\/p><\/div>\n<div class=\"flex_column av_two_third  flex_column_div   avia-builder-el-6  el_after_av_one_third  el_before_av_hr  column-top-margin\" ><section class=\"av_textblock_section \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock  '   itemprop=\"text\" ><h4>EN ISO 9223<\/h4>\n<h5>Environment Harshness table<\/h5>\n<\/div><\/section><br \/>\n<div class='avia-data-table-wrap avia_responsive_table'><table class='avia-table avia-data-table avia-table-1  avia-builder-el-8  el_after_av_textblock  avia-builder-el-last  avia_pricing_default '  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/Table\" ><tbody><tr class='avia-heading-row'><th class=''><\/th><th class=''>Life Span<\/th><\/tr><tr class=''><td class=''>C1: Very Low (Internal buildings with clean atmospheres)<\/td><td class=''>100 years +<\/td><\/tr><tr class=''><td class=''>C2: Low (Low level of pollution, mostly rural areas)<\/td><td class=''>100 years +<\/td><\/tr><tr class=''><td class=''>C3: Medium (Urban and industrial atmospheres, moderate sulphur dioxide pollution, coastal areas with with low salinity)<\/td><td class=''>50 years +<\/td><\/tr><tr class=''><td class=''>C4: High (Industrial areas and coastal areas with moderate salinity)<\/td><td class=''>30 years +<\/td><\/tr><tr class=''><td class=''>C5: Very High (Industrial areas with high humidity and aggressive atmosphere, coastal and offshore areas with high salinity within 500m of the sea)<\/td><td class=''>15 years +<\/td><\/tr><tr class=''><td class=''>CX: Extreme (Extreme industrial areas, coastal and offshore areas with prolonged contact with salt spray)<\/td><td class=''>5 years +<\/td><\/tr><\/tbody><\/table><\/div><style type='text\/css'>.avia-table-1 td:nth-of-type(1):before { content: ''; } .avia-table-1 td:nth-of-type(2):before { content: 'Life Span'; } <\/style><\/p><\/div>\n<div  class='hr hr-default   avia-builder-el-9  el_after_av_two_third  el_before_av_one_third '><span class='hr-inner ' ><span class='hr-inner-style'><\/span><\/span><\/div>\n<div class=\"flex_column av_one_third  flex_column_div first  avia-builder-el-10  el_after_av_hr  el_before_av_one_third  \" ><section class=\"av_textblock_section \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock  '   itemprop=\"text\" ><h4>Special Environments.<\/h4>\n<p>In Australia\u00a0there are areas where local conditions create an increased likelihood of corrosion. Special consideration should be given to material selection and design in these areas. They include:<\/p>\n<h4>1. Coastal Environment<\/h4>\n<p>Within 1000m of the coast, characterised by:<br \/>\nLight salt deposits<br \/>\nA frequent smell of salt in the air<br \/>\nIn the immediate vicinity of large expanses of calm salt water such as harbour foreshores<br \/>\nThis environment may be extended inland by prevailing winds and local conditions.<\/p>\n<h4>2. Industrial Environments<\/h4>\n<p>Within 500m of corrosive industrial emissions and subject to heavy fallout from them.<\/p>\n<\/div><\/section><\/div>\n<div class=\"flex_column av_one_third  flex_column_div   avia-builder-el-12  el_after_av_one_third  el_before_av_one_third  \" ><section class=\"av_textblock_section \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock  '   itemprop=\"text\" ><h4>Acidic Soils.<\/h4>\n<p>When constructing gabion retaining walls in strongly acidic soils (PH over 5.5), the soil and the corrosive groundwater must be separated from the gabion structure by using geotextile fabrics and a properly designed drainage system.<\/p>\n<\/div><\/section><br \/>\n<section class=\"av_textblock_section \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock  '   itemprop=\"text\" ><h4>AS \/NZS 4534.<\/h4>\n<p>Zinc and zinc\/aluminium &#8211; alloy coatings on steel wire Class W10 (heavy coating).<\/p>\n<\/div><\/section><br \/>\n<section class=\"av_textblock_section \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock  '   itemprop=\"text\" ><h4>15 year Study.<\/h4>\n<p>Here is the\u00a0link to a 15 year long study on factors that effect the life span of gabions<\/p>\n<p><span style=\"color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"http:\/\/www.dot.ca.gov\/hq\/oppd\/hydrology\/gabionmesh.pdf\">State of California Gabion mesh corrosion report<\/a><\/span><\/p>\n<\/div><\/section><\/p><\/div>\n<div class=\"flex_column av_one_third  flex_column_div   avia-builder-el-16  el_after_av_one_third  avia-builder-el-last  \" ><section class=\"av_textblock_section \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock  '   itemprop=\"text\" ><h4>Galvanisation.<\/h4>\n<p>Galvanising protects the gabion steel in two ways<\/p>\n<p>1\/ it forms a corrosion resistant coating over the steel, that protects the steel from oxidation.<\/p>\n<p>2\/ the galfan serves as a sacrificial anode, so even if the coating is scratched the exposed steel, \u00a0does not rust while the ZnAl is present<\/p>\n<p>Aluminium\u00a0and zinc are used as sacrificial metals. They are more reactive than iron and lose their electrons\u00a0in preference to iron. Therefore there is no need to protect the cut ends of the gabion wire, or worry about small scratches to the gabion during construction.<\/p>\n<\/div><\/section><br \/>\n<section class=\"av_textblock_section \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock  '   itemprop=\"text\" ><h4>PVC Coating.<\/h4>\n<p class=\"style26\">1\/ PVC coating does <strong>not<\/strong> improve the gabions resistance to damage from flood debris\u00a0impact.<\/p>\n<p class=\"style26\">Rock impact tends break wires instantly and the thicker the wire the less likely this damage is to occur.<\/p>\n<p class=\"style26\">Gabion1\u00a0recommend using the thicker 4.5mm welded mesh gabions for erosion control<\/p>\n<p class=\"style26\">Caltrans report states that,<\/p>\n<p class=\"style26\"><span style=\"color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"http:\/\/www.dot.ca.gov\/hq\/oppd\/hydrology\/gabionmesh.pdf\">State of California Gabion mesh corrosion report<\/a><\/span><\/p>\n<p class=\"style26\"><em>PVC-coated wires usually performed better than zinc-coated wires in severe, natural exposures. They showed very little to no strength loss for about 13 years, although wires were in early states of corrosion. Because the bond between PVC and the underlying metal broke after cycling through temperature changes (daily or seasonally), a capillary space formed, where electrolyte migrated, and then corrosion started. In continued severe exposures, we expect that PVC-coated wires will continue to corrode, possibly disintegrating within the confined PVC sheath, or expanding and breaking the PVC as corrosion compounds form.<\/em><\/p>\n<p class=\"style26\"><em>PVC has a smooth and shiny surface when it is newly manufactured. After about 3 to 5 years of exposure to sunlight, PVC photo-degraded, and it became dull and got chalky. Simply described, photons (incident light) displaced chloride ions in surface molecules. Plasticizers may be added to PVC for flexibility. After about 7 years at site 7, the surfaces of sun-exposed PVC coating developed cracks. As plasticizer compounds volatilized, PVC coating shrank and cracked. Among the sites where test panels were submerged in either mud or water, PVC did not become dull, like sun-exposed PVC. Instead, PVC hardened and often discolored by reacting with its surroundings.<\/em><\/p>\n<p>Once the PVC coating is damaged, the gabion then relies on the Galfan coating to prevent corrosion.<\/p>\n<p>In erosion control applications the PVC is often chipped off and damaged by flood debris<\/p>\n<p>The images below are\u00a0of \u00a0PVC mesh that was damaged in transit, before gabion assembly and prior to the rocks being added.<\/p>\n<\/div><\/section><br \/>\n<div class='avia-image-container  av-styling-    avia-builder-el-19  el_after_av_textblock  el_before_av_image  avia-align-center '  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"  ><div class='avia-image-container-inner'><div class='avia-image-overlay-wrap'><img class='avia_image' src='https:\/\/www.gabion1.com.au\/wp-content\/uploads\/2016\/06\/pvc-mesh-damage-2.jpg' alt='pvc mesh damage' title='pvc-mesh-damage-2' height=\"158\" width=\"559\"  itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div><br \/>\n<div class='avia-image-container  av-styling-    avia-builder-el-20  el_after_av_image  avia-builder-el-last  avia-align-center '  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"  ><div class='avia-image-container-inner'><div class='avia-image-overlay-wrap'><img class='avia_image' src='https:\/\/www.gabion1.com.au\/wp-content\/uploads\/2016\/06\/pvc-mesh-damage-3.jpg' alt='' title='pvc-mesh-damage-3' height=\"377\" width=\"559\"  itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div><\/p><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"open","template":"","meta":{"footnotes":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Gabion Basket Design Life Chart - Gabion1 Australia<\/title>\n<meta name=\"description\" content=\"railway ballast a viable gabion fill option for landscape gabions |\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.gabion1.com.au\/gabion-life-expectancy\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Gabion Basket Design Life Chart - Gabion1 Australia\" \/>\n<meta property=\"og:description\" content=\"railway ballast a viable gabion fill option for landscape gabions |\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.gabion1.com.au\/gabion-life-expectancy\/\" \/>\n<meta property=\"og:site_name\" content=\"Gabion1 Australia\" \/>\n<meta property=\"article:modified_time\" content=\"2016-06-17T00:00:27+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.gabion1.com.au\/gabion-life-expectancy\/\",\"url\":\"https:\/\/www.gabion1.com.au\/gabion-life-expectancy\/\",\"name\":\"Gabion Basket Design Life Chart - Gabion1 Australia\",\"isPartOf\":{\"@id\":\"https:\/\/www.gabion1.com.au\/#website\"},\"datePublished\":\"2016-02-29T20:34:24+00:00\",\"dateModified\":\"2016-06-17T00:00:27+00:00\",\"description\":\"railway ballast a viable gabion fill option for landscape gabions |\",\"breadcrumb\":{\"@id\":\"https:\/\/www.gabion1.com.au\/gabion-life-expectancy\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.gabion1.com.au\/gabion-life-expectancy\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.gabion1.com.au\/gabion-life-expectancy\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.gabion1.com.au\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Gabion Basket Design Life Chart\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.gabion1.com.au\/#website\",\"url\":\"https:\/\/www.gabion1.com.au\/\",\"name\":\"Gabion1 Australia\",\"description\":\"Gabion baskets 1000&#039;s of sizes\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.gabion1.com.au\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Gabion Basket Design Life Chart - Gabion1 Australia","description":"railway ballast a viable gabion fill option for landscape gabions |","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.gabion1.com.au\/gabion-life-expectancy\/","og_locale":"en_US","og_type":"article","og_title":"Gabion Basket Design Life Chart - Gabion1 Australia","og_description":"railway ballast a viable gabion fill option for landscape gabions |","og_url":"https:\/\/www.gabion1.com.au\/gabion-life-expectancy\/","og_site_name":"Gabion1 Australia","article_modified_time":"2016-06-17T00:00:27+00:00","twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"6 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.gabion1.com.au\/gabion-life-expectancy\/","url":"https:\/\/www.gabion1.com.au\/gabion-life-expectancy\/","name":"Gabion Basket Design Life Chart - Gabion1 Australia","isPartOf":{"@id":"https:\/\/www.gabion1.com.au\/#website"},"datePublished":"2016-02-29T20:34:24+00:00","dateModified":"2016-06-17T00:00:27+00:00","description":"railway ballast a viable gabion fill option for landscape gabions |","breadcrumb":{"@id":"https:\/\/www.gabion1.com.au\/gabion-life-expectancy\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.gabion1.com.au\/gabion-life-expectancy\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.gabion1.com.au\/gabion-life-expectancy\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.gabion1.com.au\/"},{"@type":"ListItem","position":2,"name":"Gabion Basket Design Life Chart"}]},{"@type":"WebSite","@id":"https:\/\/www.gabion1.com.au\/#website","url":"https:\/\/www.gabion1.com.au\/","name":"Gabion1 Australia","description":"Gabion baskets 1000&#039;s of sizes","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.gabion1.com.au\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"}]}},"_links":{"self":[{"href":"https:\/\/www.gabion1.com.au\/wp-json\/wp\/v2\/pages\/5322"}],"collection":[{"href":"https:\/\/www.gabion1.com.au\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.gabion1.com.au\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.gabion1.com.au\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gabion1.com.au\/wp-json\/wp\/v2\/comments?post=5322"}],"version-history":[{"count":0,"href":"https:\/\/www.gabion1.com.au\/wp-json\/wp\/v2\/pages\/5322\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.gabion1.com.au\/wp-json\/wp\/v2\/media?parent=5322"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}