Determination of Strength Characteristics of SuperPlasticized Concrete (Study on Common Concrete in Calabar South of Cross River State, Nigeria)

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
  
© 2018 by IJETT Journal
Volume-60 Number-2
Year of Publication : 2018
Authors : E.G.Ewah, E.E.Nyah and E.E.Okon F.j.Egu
  10.14445/22315381/IJETT-V60P218

MLA 

E.G.Ewah, E.E.Nyah and E.E.Okon F.j.Egu "Determination of Strength Characteristics of SuperPlasticized Concrete (Study on Common Concrete in Calabar South of Cross River State, Nigeria)", International Journal of Engineering Trends and Technology (IJETT), V60(2),128-134 June 2018. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group

Abstract
This research is geared towards determining the strength characteristics of super plasticized concrete commonly used in Calabar South of Cross River State, Nigeria. The samples for all tests were made from concrete with a target compressive strength of 30N/mm2. Concrete were batched by weight and mixed in the ratio of cement: sand: gravel = 1: 1 7/10: 3 9/10 at a water/cement ratio of 0.50. Concrete were prepared in accordance with ACI 318-05 Building Code for Structural Concrete, BS 410 and CP110-1:1972,6. WaterseaL (WS) waterproofing compound (specially manufactured for MB London LTD) and JK waterproofing compound (manufactured by Ujala Merchants & Traders Magur, India) were used as superplasticizers. The superplasticizers were then incorporated into the concrete by weight in the ratio of superplasticizer: cement ratio of 1: 50 and 5: 50 respectively to obtain water reduction of 2% and 10%. The results show that the mix series with superplasticizer: cement ratio of 1: 50 decreased the average compressive strength by 14% average while the series with superplasticizer: cement ratio of 5: 50 increased the average compressive strength by 10% average. Hence strength is a function of superplasticizer quantity. The superplasticizers exhibit low workability characteristics and are suitable for mass and reinforced concrete sections with vibration. Furthermore, the superplasticizers act as accelerators by shortening the time of set in concrete by 30minutes average. It is suggestion that apart from water sealing in concrete, WATERSEAL and JK waterproofing compounds should also be used as accelerators for mass and reinforced concrete sections with vibration.

Reference
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Keywords
Superplasticizer; Accelerator; Concrete; Aggregate; Compressive strength; Concrete mix design; Batching.