• Jayant Damodar Supe
• Dr. M.K.Gupta

The building construction technology is as old as human civilization. Several types of building construction materials were used in ancient times such as e.g. wood , stone, bricks, iron , lime , cement etc. With introduction of concrete technology the use of above materials and labour in any building construction is subdivided as 16% stone in foundation, 22% bricks in superstructure, 16% iron reinforcement in concrete in columns and roof slab, 10% wood in doors and windows, 16% use of other materials in flooring and remaining parts of buildings and 30% labour cost. With advent of concrete technology use of concrete in-situ is widely increased across the world. Therefore researches were carried out to set standard code of practice to facilitate the users for executing safe and durable construction works. Every nation therefore made standard codes of practice to be followed by civil engineers. Strength of concrete in-situ is gained over period of 28 days depending upon the method of curing followed. It is found that warm water curing results into high strength of concrete at early stages , and maximum strength is achieved in 28 days. In this paper comparative study of codes followed by ASTM C 684 – 99, BS 1881:Part112:1983. and I.S 9013-1978, for making, curing and determining the compressive strength of accelerated cured concrete of test specimens is discussed. Recently green building concept has been introduced. The specification for green building concrete in-situ demands that the materials used in construction must be economical (energy saving in mining), eco-friendly (Control of CO2 level to make living pleasant) time saving (rapidity in construction). The existing concrete code does not provide specifications for green building concrete materials. Therefore authors carried out further study to know the behavior of concrete when demolished waste concrete of buildings is used as coarse aggregate. Determination of early age strength of concrete is useful in determining compressive strength of concrete in construction of heavy structures such as multi-storey buildings , dams , bridges etc, where maximum load is in vertical direction also there is need of determination of early tensile strength of concrete in case of concrete road pavements. Hence suitability of different methods of accelerated curing is being studied which can be implicated at site without much skilled labour and heavy instruments.

Accelerated curing; Compressive strength; Standard Code of practice for concrete.

"Standard codes of practice for Accelerated Curing of Concrete", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.4, Issue 1, page no.1409-1416, January-2017, Available :http://www.jetir.org/papers/JETIR1701614.pdf

"Standard codes of practice for Accelerated Curing of Concrete", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.4, Issue 1, page no. pp1409-1416, January-2017, Available at : http://www.jetir.org/papers/JETIR1701614.pdf