Utilization of two stage concreting method in the case of steel slag aggregate concrete

Firstly, developed in the years of 1930, two stage concrete is considered as a unique concreting method that is different from conventional concreting method. The first stage consists of pre-placing coarse aggregates in the formwork and the second stage consists of filling voids between aggregate pa...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2018-10, Vol.431 (8), p.82008
Main Authors: Khanh Son, Nguyen, Trung Tin, Nguyen, Tri Huynh, Nguyen Ngoc
Format: Article
Language:English
Subjects:
Aggregates
Bleeding and segregation
Compressive strength
Concrete aggregates
Concreting
Formwork
Grout
Mortars (material)
Slag
Water absorption
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Summary:Firstly, developed in the years of 1930, two stage concrete is considered as a unique concreting method that is different from conventional concreting method. The first stage consists of pre-placing coarse aggregates in the formwork and the second stage consists of filling voids between aggregate particle with grout mortar of cement. In this paper, we studied the feasibility of casting two stage concrete with 100 % steel slag as coarse aggregate. In term of formulation, to adopt two stage concreting method we could minimize the risk of concrete bleeding and segregation due to high water absorption and quite high density of slag aggregate. In term of resistance, the evidence of solid cohesion between mortar phase and slag aggregate was revealed on 28 days - cured concrete specimens. And the compressive strength was measured at 28.3 MPa. From that, we discussed on the possibility of slag aggregate concrete for the purpose of large scale recycling steel slag with sustainability.
ISSN:1757-8981
1757-899X
1757-899X
DOI:10.1088/1757-899X/431/8/082008