鲁南高速铁路曲阜东站路基泡沫混凝土制备关键技术及应用

结合鲁南(兰考—日照)高速铁路曲阜东站路基工程实际需求和泡沫混凝土技术现状,通过室内外试验,对比了粉煤灰、铁尾矿微粉、耐碱短切玻璃纤维及制备工艺对泡沫混凝土力学性能、水化热、干缩变形等影响,提出了与工况相适应的绿色高性能泡沫混凝土配制关键技术,并进行了工程应用.结果表明:铁尾矿微粉、粉煤灰在泡沫混凝土中具有良好的级配填...

Key Technology and Application of Foamed Concrete Preparation in Subgrade of Qufu East Station of Lunan High Speed Railway

Combined with the actual demand of subgrade engineering of Qufu East Station of Lunan(Lankao-Rizhao)high speed railway and the current situation of foamed concrete technology,the effects of fly ash,iron tailings powder,alkali resistant glass fiber and preparation technology on the mechanical properties,hydration heat and dry shrinkage deformation of foamed concrete were compared,through both indoor and outdoor tests. The key technology of environment-friendly high-performance foamed concrete preparation adapted to working conditions was put forward and applied in engineering. The results show that iron tailings powder and fly ash have good gradation filling and microaggregate skeleton function and reduce the hydration heat effect in foamed concrete. The hydration temperature rise and shrinkage deformation of foamed concrete can be effectively reduced by adding both fly ash and iron tailings powder as well as alkali resistant glass fiber. The foamed concrete which meets the technical requirements of Qufu East station of Lunan high speed railway has been prepared successfully and good results have been achieved in engineering application.