Granulated Blast Furnace Slag In Structural Lightweight Panel For Housing

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Date
2016-08
Authors
Mahmood, Zaid Shaker
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Abstract
Granulated blast furnace slag (GBS) is the main waste material produced by the iron industry. In order to activate as an effective pozzolanic material, GBS needs to be ground. Hence, adding to its value in cost and putting in to its production more energy, and as a result, more gas emissions to the environment. This study aimed on using GBS to be used as partial cement replacement for the production of foam concrete. GBS is used to partially replace cement at replacement levels of 30-70% by weight of cement in a 1300kg/m3 foam concrete mix using three different filler to binder ratios (1.0, 1.5 and 2.0). In order to have a better understanding about the difference in performance between GBS and the widely used enhanced ground granulated blast furnace slag (GGBS), GGBS was used in producing foam concrete using similar density, replacement levels and filler to binder ratios. A total of 36 mixes were prepared and were tested for their physical, mechanical and durability properties at different ages. Results showed that the optimum foam concrete GBS mix was the mix that contained 30% of GBS and with filler to binder ratio of 1.5. This mix was chosen for the fabrication of the outer shell for the precast wall panel. The load bearing wall panel made out of two halves connected together using steel bolts. The outer shells are designed as a ribbed panel and an inner core made out of a 500kg/m3 foam concrete mix. Through the experimental test, the wall panels achieved an average breaking load of 391kN, which is greater by 51.6% in comparison to the theoretical load determined using the ultimate design load
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GBS to be used as partial cement replacement , for the production of foam concrete.
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