GENESIS OF STRUCTURE AND SULFATE RESISTANCE OF FLY ASH ALKALI ACTIVATED CEMENTS
One of the most important questions of concrete durability is increasing of corrosion resistance of cement stone and materials on its basis.Perspective way of solving such problem is using of fly ash alkali activated binders.Objects of present studies were fly ash alkali activated cements with fly ash content up to 70% by mass; as activator were chosen Ca-containing components (OPC,ground blast-furnace slag) and alkaline component.It was studied sulfate resistance of fly ash alkali activated cements after 3 years of storing in aggressive environments like 5 and 10 % solutions of sodium sulfate,2 and 4 % solutions of magnesium sulfate and sea salt solution.It was shown that fly ash containing cements are characterized by high corrosion resistance (coefficient of corrosion resistance after 3 years of storing in aggressive environment is in the ranges 0.8-1.0) comparing with clinker cements (0.45-0.88).Shown,that high sulfate resistance of cements under study in time is caused by graduate structure development and crystallization of new formations with compacting structure of material that affects on service properties of materials.
Krivenko P.V. Grabovchak V.V. Kovalchuk O.Yu.
Kyiv National University of Civil Engineering and Architecture V.D.Glukhovskii Scientific Research Institute for Binders and Materials
国际会议
长沙
英文
281-288
2014-06-01（万方平台首次上网日期，不代表论文的发表时间）