{"id":869,"date":"2021-06-01T09:20:49","date_gmt":"2021-06-01T09:20:49","guid":{"rendered":"http:\/\/habitatcdp.microwarecomp.com\/?page_id=869"},"modified":"2021-07-17T06:10:04","modified_gmt":"2021-07-17T06:10:04","slug":"importance-of-curing","status":"publish","type":"page","link":"https:\/\/cdp.habitatindia.net\/ml\/importance-of-curing\/","title":{"rendered":"Importance of curing"},"content":{"rendered":"
\n
\n<\/div>\n<\/div>\n
\n
\n
\n
\n

Importance of curing and its methods for different components of house<\/span><\/h1>\n
What is curing?<\/h5>\n

In any building construction which involves the usage of cement as a building product in any component of the\nbuilding, it is an absolutely necessary process to keep the freshly placed concrete or mortar moist. The method of keeping the cement moist in order\nto maintain a commensurate natural temperature between the concrete and the immediate environment, in order to develop the desired properties of\nconcrete or mortar in terms of strength & durability is curing.<\/p>\n\n

Why curing is important?<\/h5>\n

As the concrete is placed, it starts to get in the hard state. The reaction between cement and water starts\nwhen the water is first added to the dry concrete mix. This reaction is called hydration and it releases heat. Thus the water starts evaporating,\nonce water evaporates from the surface of concrete, the hydration process slow down or it stops. It may result in development of cracks or reduces the\nstrength and durability of concrete. Curing helps to decrease the heat of hydration produced in concrete which leads to the formation of cracks. It\nhelps in securing bonding structure of the concrete.<\/p>\n\n

\n
    \n \t
  • To prevent the concrete to dry out prematurely due to solar radiation and wind. This prevents plastic shrinkage of concrete.<\/li>\n \t
  • It helps to maintain the concrete temperature by allowing the hydration process. Hydration process requires water to carry on and releases heat.<\/li>\n \t
  • Curing helps the concrete to harden and bond with internal materials and reinforcement. This helps to prevent damage to bond between concrete\nand reinforcement due to vibration and impact.<\/li>\n \t
  • This helps development of impermeable, crack free and durable concrete.<\/li>\n<\/ul>\n<\/div>\n
    Methods of curing<\/h5>\n
    \n
      \n \t
    1. \n

      Spraying<\/p>\nCuring by spraying of water or fogging is one of the conventional and most commonly\nused methods of curing concrete in the construction industry which is carried out by sprinkling\/spraying water on the surface of concrete for 2\nor more coats by using pipe, nozzles or sprayers.<\/li>\n \t

    2. \n

      Gunny bags<\/p>\nWater absorbent fabrics are used to maintain moisture on the concrete surface by\ncompletely covering the surface immediately after the concrete has hardened sufficiently. One such material is gunny bags which have greater\ncapacity of holding water for longer time period. So wet gunny bags are placed on the surface of concrete and left for some period of time\ntill these gunny bags become dry.\nGunny bags are mostly used for curing of non-flat surfaces. They must be continuously kept wet to prevent the fabric from absorbing water from\nthe body of concrete, due to capillary action. Generally jute bags, cotton mats, hessian cloth, etc. are used as a covering.<\/span>\n<\/li>\n \t

    3. \n

      Ponding<\/p>\nThis method is usually carried out for slab curing. Boundaries or small rectangular\nartificial ponds are formed with mortar on all the side of slab for thickness of about 4cm to 5cm and water is made to store on the slab in the\nform of pond two or three times per day depending upon the atmospheric conditions.\nThis method is very efficient but the amount of water required is huge\nMethods like membrane curing and steam curing are also considered as different methods of curing, but they are not much used practically.<\/span><\/li>\n<\/ol>\n<\/div>\n

      Duration of curing for various components<\/h5>\n

      As per IS 456 -2000, the curing duration of concrete according of various conditions\nare given below:<\/p>\n\n

      \n
        \n \t
      • Concrete with ordinary Portland cement \u2013 Min 7 days<\/li>\n \t
      • Concrete with mineral admixtures or blended cement \u2013 Min 10 days<\/li>\n \t
      • Concrete exposed to extreme dry and hot weather conditions using OPC\u2013 Min 10 days<\/li>\n \t
      • Concrete exposed to extreme dry and hot weather conditions using mineral admixtures or blended cement \u2013 Min 10 days<\/li>\n \t
      • For brick work curing should be commenced within 12 hours.\n
          \n \t
        • In case of cement sand mortar \u2013 Min 7 days<\/li>\n \t
        • In case of rich mortar 1:4 and more- 10 days.<\/li>\n<\/ul>\n<\/li>\n \t
        • Water curing the existing wall before plaster is required just once immediately before commencement of plaster. It is done to ensure that the existing wall does not absorb water from cement paste (mortar) that is used for plaster<\/li>\n \t
        • Finished brickwork in lime mortar should be cured for a period of 2 to 3 weeks. This period can be reduced to 1 to 2 weeks in case of brickwork with cement mortar<\/li>\n \t
        • For cement plaster curing should be started 24 hours after finishing – 7 days<\/li>\n \t
        • For red oxide flooring,\n
            \n \t
          • First day – cure the floor by sprinkling water every two to three hours for a whole day, to avoid a dry floor.<\/li>\n \t
          • The second day – a thin sheet of water should be stocked up to check if white patches appear on the floor. If they do, remove the water, rub them off with a cloth and again refill water, until no white patches are visible.<\/li>\n \t
          • Once the floor is laid, no one should walk on it for a minimum of four days, except for watering and waxing.<\/li>\n \t
          • For tiled [Mooring, ti\/ing work must be cured for at least 7 to 20 daYs,and fill the joints with grout and c\/eon them proper\/y after completion o(curing period.<\/li>\n<\/ul>\n<\/li>\n \t
          • For tiled flooring, tiling work must be cured for at least 7 to 10 days, and fill the joints with grout and clean them properly after completion of curing period.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"Importance of curing and its methods for different components of house What is curing? In any building construction which involves the usage of cement as a building product in any component of the building, it is an absolutely necessary process to keep the freshly placed concrete or mortar moist. The method of keeping the cement […]","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-869","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/cdp.habitatindia.net\/ml\/wp-json\/wp\/v2\/pages\/869","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cdp.habitatindia.net\/ml\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/cdp.habitatindia.net\/ml\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/cdp.habitatindia.net\/ml\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cdp.habitatindia.net\/ml\/wp-json\/wp\/v2\/comments?post=869"}],"version-history":[{"count":19,"href":"https:\/\/cdp.habitatindia.net\/ml\/wp-json\/wp\/v2\/pages\/869\/revisions"}],"predecessor-version":[{"id":3484,"href":"https:\/\/cdp.habitatindia.net\/ml\/wp-json\/wp\/v2\/pages\/869\/revisions\/3484"}],"wp:attachment":[{"href":"https:\/\/cdp.habitatindia.net\/ml\/wp-json\/wp\/v2\/media?parent=869"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}