Non-hydraulic lime or as it’s also known, fat lime putty is a white, putty like material with a fairly solid consistency. Legal | Copyright © 2019 Graymont Limited, Benefits of Type S Dolomitic Hydrated Lime, Where X1 = Units of volume of cement (portland or blended), X2 =  Units of volume of lime (lime putty or hydrated lime), Assume that 7 shovels of sand were found to equal one cubic foot, Assume a Type O mortar mix design of 1:2:9. Thus any salt content in the water crystallises on the lime, damaging the lime and thus saving the masonry. The benefits seem to come from the hot mix itself but do not require the mix to be used hot – in fact, for plastering it would normally be left a least a day to improve before being used. Lime mortars for lime pointing are generally softer and more porous compared to mixes using cement therefore allowing moisture to evaporate from the joints more freely. Hydrated lime can be mixed with portland cement and other ingredients to make mortar mix and base coat stucco. Indian traditional structures built with lime mortar, which are more than 4,000 years old like Mohenjo-daro is still a heritage monument of Indus valley civilization in Pakistan. Method 1: Hot lime mortar. Mortar is the bonding material between bricks, concrete block, stone, and many other masonry materials. It is usually laid in thin layers as thicker layers may crack during the drying process. Use to repair masonry walls. Use to lay brick, block and stone. Mortar mixes are classified based on compressive strength and their bonding properties and flexibility. It is vital to understand that, until the Second World War, a majority of limes were still prepared from freshly burnt quicklime delivered to site, as opposed to ready-to-use slaked putties, which would have been extremely heavy to transport, or bagged dry-hydrates. Add ¾ of the water required 2. Portland Lime is a type S commercial-grade lime cement. But this does not turn the mix into putty or a paste. Once this number is obtained, the total number of shovels of sand per batch can be determined as follows: Note: Sand shovels per cubic foot can range from 6-9 depending on the variables listed. Its use dates back at least 6,000 years, to the Ancient Egyptians who used lime to plaster the pyramids. By following the proper mixing procedures, excellent board life, workability and sand carrying capacities are achieved with lime mortars. Portland Lime can be mixed with sand to create a mortar mix for masonry projects. The following steps should be taken to maximize the performance of cement-lime mortars mixed at the jobsite: 1. These are defined as mortars manufactured by mixing quicklime and sand, rather than the current and more commonly adopted method of combining previously slaked lime with sand. Apply the mortar within about two hours of mixing it. The limestones from which hydraulic limes are formed naturally contain a varied range of minerals of which silica and alumina are the main ones for creating hydraulic lime. This type of hot mix is typically used for building or pointing rubble masonry, and for harling. If a cubic foot box is not available, the number of shovels per cubic foot could be determined by shoveling the sand into five gallon pails. mixing the specified proportions of hydrated/hydraulic lime, sand and then water This results in much less damage, and is relatively simple to repair. Cementitious Reactions - Pozzolonic reactions can occur between hydrated lime and silica compounds in the mortar mix. This indicates that 63 shovels of sand are required per bag of cement for a Type O mortar at this jobsite. The proportioning and mixing guide for site-made mortar (below) also applies to lime-sand mortar. Before commencing the work, make sure that the lime plaster has been mixed thoroughly to render it more plastic and workable. It is considered to be a general-purpose mix, useful for above grade, exterior, and interior load-bearing installations. Choosing a mortar mix is not an exercise based only on the resistance and strength of each mortar, it must depend on its use, adhesion, and sealing requirements. Hydraulic Lime Mortar Ready to Mix, Add Water Traditional lime mortar with all the practical benefits of a modern mortar. Creating planner stickers for you since 2014. Our lime mortars are quality tested for ease of use & lasting results. A shovel full of sand is a subjective measurement tool on the job site. This allows the wall to dry out, ensuring that the stonework or brickwork is not damaged. There are three strength grades for natural hydraulic lime (NHL); NHL2, a slow setting and softer material, perfect for internal applications or where conservation is a primary concern with soft or deteriorating stones and bricks. 01904 405797 Problems With Cement in Traditional Buildings – Video, How Guide – Pointing a Brick Wall With Lime Mortar, How To Guide – Racking Out Using An Arbortech Allsaw, NBT Insulation Systems by Natural Building Technologies, Internal Wall Insulation (IWI) Lime Plastered. When repointing, existing pointing should be raked out to at least twice the width of the joint. Artificial hydraulic lime is produced by introducing specific types and quantities of additives to the source of lime during the burning process. Our Lime Mortar & other binders are made from St. Astier Natural Hydraulic Lime. We shall not be liable for incidental and consequential damages, directly or indirectly sustained, nor for any loss caused by application of these goods not in accordance with current printed instructions or for other than the intended use. The following steps should be taken to maximize the performance of cement-lime mortars mixed at the jobsite: NOTICE: There are no warranties that extend beyond the description contained herein. The number of shovels of sand required to fill up 1½ 5 gallon buckets is equivalent to one cubic foot. York Non-hydraulic lime is produced from a high purity source of calcium carbonate such as chalk, limestone or even oyster shells. Pounding the lime plaster between two hawks can do the trick. Use the cement mortar. Add remaining water needed to obtain a workable consistency 8. When mixing batches of lime mortar you can easily see the results of a correct ratio. Preparing the masonry. 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