Research On Preparation Of Alinite Cement With Solvay Distiller Waste And Chlorine Leachability From Hydrates

As a kind of industrial solid waste, the solvay distiller waste is one of the majorwaste during the produce of sodium carbonate from ammonia. Now China is the biggestcountry producing sodium carbonate in the world, and produces the largest amount ofsolvay distiller waste. To solve the contamination of solvay distiller waste, this papercarried out a number of experiments.The chemical contents of solvay distiller waste issimilar to the alinite minerals, and this paper will refer it as a raw material incorporatewith limestone, magnetite mill tailings and pyrophyllite stone to prepare alinite clinkers.Then the paper takes out a series of experiment to explore the compatibility to the othercomponents of concrete, and to check the leachability of chlorine ion during hydration ofalinite cement, and the conditions of alinite cement application.It can be concluded out from the sintering experiments of alinite clinkers that,referring the solvay distiller waste, limestone, magnetite mill tailings and pyrophyllite asthe raw materials of alinite cement can produce alinite clinker with good properties. Theoptimum condition is: sintering at1180℃for2.5h, and the clinkers are cooled by itselfunder natural conditions.The alinite cement prepared under the above conditions is applied for concrete, anddifferent rebar inhibitor dosages are investigated. This paper also investigates thecompressive strength and hydrates pattern of concrete with different curing times. Theresults show that,1) the appropriate dosage of rebar inhibitor does reduce the leaching ofchlorine ions, and the optimum dosage of rebar inhibitor is0.8%;2) the dosage of rebarinhibitor does no impression on strength of concrete, and can only inhibit erosion of barsin concrete.