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IJSTR >> Volume 9 - Issue 9, September 2020 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



Cost Effective Solution For Self-Compacting Concrete Technology

[Full Text]

 

AUTHOR(S)

Nguyen T. Nien, Dang H. Minh

 

KEYWORDS

natural sand, industrial sand, self-compacting concrete-SCC, powder-type SCC, combination type SCC,

 

ABSTRACT

Although self-compacting concrete (SCC) has excellent applicability for elements with complicated shapes and congested reinforcement, its supply cost could be two to three times of that of conventional concrete depending on the composition of the mixture and the quality control of concrete producers, which in turn might limit the applications to general construction. In this paper, the authors proposed the cost effective solution for SCC technology involving the industrial sand usage with application of combination-type for proportioning SCC. The advantages of industrial sand usage are two-fold; firstly this sand can be manufactured with the customized fine content, which can play a role to increase the powder content, and secondly the replacement of natural sand could relieve the scarcity of this material. SCC using industrial sand of strength class 30MPa was successfully designed in this study. Not only were the rheological properties in agreement with guideline and recommendation for SCC, but also the mechanical properties including compressive strength, flexural strength, splitting tensile strength and elastic modulus comply with the one prescribed in Eurocode for this type of concrete strength class. Besides, the cost analysis pointed out that this type of SCC has a 20% lower price on the basis of volume 1m3 in comparison with the conventional SCC.

 

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