{"product_id":"roman-cement","title":"Roman Cement","description":"\u003cp\u003eRoman Cement is a term used to describe certain hydraulic binders produced by the calcination in a coal or coke fired kiln of limestones containing significant clay minerals (principally iron, silica and alumina). The name was adopted in c.1800 because the typical red or brown colour was thought to resemble mortars of the Roman period.\u003c\/p\u003e\n\u003cp\u003eRoman cement was first produced in 1794 by James Parker from the clay-rich septaria of Harwich but similar products including ‘Medina’ and ‘Sheppey’ cements were subsequently produced from the septaria of the Solent and Thames estuary. These were not supplied as hydrates, but mixed with water and sand on site when much heat was produced. They were fast-setting materials much used for run and cast mouldings and external renders.\u003c\/p\u003e\n\u003cp\u003eAs true Roman Cements are no longer available, modern Roman cements are based on a \u003ca href=\"https:\/\/roseofjericho.co.uk\/product\/natural-hydraulic-limes\/\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eNatural Hydraulic Lime\u003c\/a\u003e or \u003ca href=\"https:\/\/roseofjericho.co.uk\/product\/lime-sub-product-1\/\" rel=\"noopener noreferrer\" target=\"_blank\"\u003ePrompt Natural Cement\u003c\/a\u003e, mixed on site with carefully selected and blended aggregates to match the colour and properties of the original. It is normally necessary to \u003ca href=\"https:\/\/roseofjericho.co.uk\/mortar-analysis\/\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eanalyse the existing material\u003c\/a\u003e in order to design an accurate matching mix recipe.\u003c\/p\u003e","brand":"Rose of Jericho","offers":[{"title":"Default Title","offer_id":57223552041292,"sku":null,"price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0937\/1222\/0492\/files\/Screenshot2026-04-09at15.56.01.png?v=1775746574","url":"https:\/\/roseofjericho.co.uk\/products\/roman-cement","provider":"Rose of Jericho","version":"1.0","type":"link"}