1. Introduction
Stainless slag is by-product on the production of stainless steel. In Japan, stainless slag is generated approximately 30,000 ton every year. The authors investigated basic physical properties of concrete used stainless slag as fine aggregate and derived that stainless slag can be used as fine aggregate of concrete up to 60% in mix proportion without any caution. This study aims at using stainless slag effectively as a material of structural concrete. In order to promote stainless slag as fine aggregate on the structural purpose, Behavior and performance of RC simple beams used stainless slag were investigated experimentally. In the experiment of loading test, perform of mechanical response behavior due cracking, deflection and strength between using stirrups and without stirrup were measured.
2. Experimental Procedures
2.1 Material and mix proportions
Table 2. Description of reinforcement
Type Elastic Modulus Yielding strength Area Remark
(kN/mm2) (N/mm2)
Ø6 120 388 63.67 stirrup
D 16 200 350 397.2 tendon
Table 1 shows the properties of concrete materials. The ordinary Portland cement with density 3.15 g/cm3 was used. Sea sand is from the Sea of Genkain located in Fukuoka prefecture, and with dry density 2.57 g/cm3, water absorption 1.62% and fine modulus 2.85. Stainless steel slag which is by-product stainless steel production, with physical properties oven-dry density 3.04 g/cm3, surface dry density 3.08 g/cm3, water absorption1.53%, and fineness modulus 2.96, including 1.96% amount of fineness material. Reinforment consists Deformed bar D16 mm and plain bar Ø6mm as stirrups, as shown in table 2.
Table 3 shows the mix proportions and fresh properties of the concrete used in this experiment. The two ...
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...ghtly difference of two compositions of stainless slag.
(2) The deflection of beams shows RC beams contain stainless slag higher than RC beams without contain stainless slag at yielding point for beam using stirrups. However for beams without stirrup RC beams contain stainless slag slight similar than RC beams without contain stainless slag
(3) Crack occurs earlier to the beam without stirrup compare to the beams with stirrups. In other hand, loading pressure RC beams contain stainless slag show slight higher than RC beam without stainless slag at the loading date, including the amount of crack occurred.
5. Reference
(1) JSCE Guideline for Concrete no. 15 (2007) Standard Specification for concrete structure-2007 “design” English version
(2) 浦木 大資, 高海 克彦, 松尾 栄治 (2013), ステンレススラグコンクリートの基礎物性に関する研究
(3) 徳重裕平, 松尾栄治, 高海克彦, 王 亮 (2012), ステンレススラグ細骨材を用いたコンクリートの諸物性に関する研究
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