Effect of Cooling Technique of Slag on the Behavior of Cement Bricks at Ambient and Elevated Temperatures
Sustainable construction has become an interest in the engineering community.Researches are conduc ted to recycle wastes/by-products to produce more sustainable building materials.Blast furnace slag (BFS) is a by-product generated from the production of pig iron in the blast furnace.There are two main types of BFS depending on the cooling technique; air-cooled slag (ACS) produced by slow cooling under atmospher ic conditions and water-cooled slag (WCS) produced by water quenching.ACS is currently recycled as coarse aggregate and fine fractions are dumped, while WCS is recycled after grinding, which consumes a lot of energy.This paper examines the effect of using ACS and WCS without any processing to substitute natural sand (NS) in solid cement bricks.The behavior of the bricks was evaluated at ambient temperature and af ter exposure to elevated temperatures up to 800 ℃.Five mixes were prepared: M1 is the control mix without sand substitution, M2 and M3 are mixes including 50% and 100% replacement of sand with ACS, respec tively.Mixes M4 and M5 contain 50% and 100% replacement of sand with WCS, respectively.Results in dicate the possibility of recycling ACS and WCS, without processing to conserve energy, as fine aggregate in bricks manufacturing.The use of ACS resulted in a higher deterioration after exposure to elevated tempera tures, although it increased the compressive strength of the unheated specimens.On the other hand, the bricks containing WCS are thermally more stable than NS and ACS bricks.
D.M.Sadek
Lecturer, Housing and Building National Research Center, Cairo, Egypt
国际会议
哈尔滨
英文
373-381
2013-07-06（万方平台首次上网日期，不代表论文的发表时间）