{"id":34,"date":"2009-01-21T11:51:54","date_gmt":"2009-01-21T11:51:54","guid":{"rendered":"http:\/\/www.propertysurveying.co.uk\/newsletter\/?p=34"},"modified":"2009-01-21T13:09:00","modified_gmt":"2009-01-21T13:09:00","slug":"concrete-defects","status":"publish","type":"post","link":"https:\/\/www.propertysurveying.co.uk\/newsletter\/?p=34","title":{"rendered":"Concrete Defects"},"content":{"rendered":"<p>Between 1900 and the early 1950s (mid 1960s in certain areas) many properties in Cornwall and parts of Devon were built with concrete constructed of poor quality aggregate from mining waste.<\/p>\n<p>This aggregate was readily available at a minimal cost from the waste tips of old mines throughout the South West.<\/p>\n<p>Unfortunately it has now been established that the minerals contained in the aggregate material can cause a chemical reaction which results in deterioration of the strength and composition of the concrete.<\/p>\n<p>Not all buildings of that era are suspect. Many of the concrete blocks were made from good quality materials such as the course waste product from china clay workings, but as a result mortgage lenders now insist that properties built of mass concrete or block construction are tested if constructed prior to or around the early\/mid\u00c2\u00a01950\u00e2\u20ac\u2122s.<\/p>\n<p>Inspections are carried out in accordance with the Royal Institution of Chartered Surveyors Guidelines (amended 1997) in order to ascertain that the property is not structurally affected by concrete degradation.<\/p>\n<p><a href=\"http:\/\/www.propertysurveying.co.uk\/newsletter\/?page_id=31\">read more<\/a>&#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Between 1900 and the early 1950s (mid 1960s in certain areas) many properties in Cornwall and parts of Devon were built with concrete constructed of poor quality aggregate from mining waste. This aggregate was readily available at a minimal cost from the waste tips of old mines throughout the South West. Unfortunately it has now &hellip; <a href=\"https:\/\/www.propertysurveying.co.uk\/newsletter\/?p=34\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Concrete Defects&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-34","post","type-post","status-publish","format-standard","hentry","category-construction"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Concrete Defects - Property Surveying NEWSLETTER<\/title>\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.propertysurveying.co.uk\/newsletter\/?p=34\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Concrete Defects - Property Surveying NEWSLETTER\" \/>\n<meta property=\"og:description\" content=\"Between 1900 and the early 1950s (mid 1960s in certain areas) many properties in Cornwall and parts of Devon were built with concrete constructed of poor quality aggregate from mining waste. This aggregate was readily available at a minimal cost from the waste tips of old mines throughout the South West. Unfortunately it has now &hellip; Continue reading &quot;Concrete Defects&quot;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.propertysurveying.co.uk\/newsletter\/?p=34\" \/>\n<meta property=\"og:site_name\" content=\"Property Surveying NEWSLETTER\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/PropertySurveying\" \/>\n<meta property=\"article:published_time\" content=\"2009-01-21T11:51:54+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2009-01-21T13:09:00+00:00\" \/>\n<meta name=\"author\" content=\"News_Desk\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"News_Desk\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.propertysurveying.co.uk\\\/newsletter\\\/?p=34#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.propertysurveying.co.uk\\\/newsletter\\\/?p=34\"},\"author\":{\"name\":\"News_Desk\",\"@id\":\"https:\\\/\\\/www.propertysurveying.co.uk\\\/newsletter\\\/#\\\/schema\\\/person\\\/cc36096cf54ecbe36ea69b5b0da9205d\"},\"headline\":\"Concrete Defects\",\"datePublished\":\"2009-01-21T11:51:54+00:00\",\"dateModified\":\"2009-01-21T13:09:00+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.propertysurveying.co.uk\\\/newsletter\\\/?p=34\"},\"wordCount\":172,\"publisher\":{\"@id\":\"https:\\\/\\\/www.propertysurveying.co.uk\\\/newsletter\\\/#organization\"},\"articleSection\":[\"Construction Section\"],\"inLanguage\":\"en-GB\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.propertysurveying.co.uk\\\/newsletter\\\/?p=34\",\"url\":\"https:\\\/\\\/www.propertysurveying.co.uk\\\/newsletter\\\/?p=34\",\"name\":\"Concrete Defects - 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