摘要
以未磨的鞍钢齐大山铁尾矿为骨料,以铁尾矿、高炉矿渣、水泥熟料和天然石膏3级梯级混磨产品为胶凝材料制成铁尾矿混凝土试块,对直接标准养护、先56℃蒸汽养护再标准养护、先90℃蒸汽养护再标准养护的混凝土试块进行了强度、水化产物及微观结构分析。结果表明:与直接标准养护比较,先56℃蒸汽养护可以提高试块不同龄期的强度,但先90℃蒸汽养护仅能提高试块的早期强度、对后期强度有负面影响;不同养护方式都形成由石英,未水化的C3S和C2S,水化产物CH、钙矾石和C-S-H凝胶组成的致密的铁尾矿高强结构材料,但对铁尾矿混凝土的水化硬化过程有重要影响。
With Angang Qidashan unground iron railings as aggregate mixed with cementitious materials of iron tail- ings, blast furnace slag, cement clinker and natural gypsum of level 3 step mixed grindings, the concrete blocks of iron tail- ings are prepared. The concrete blocks under direct standard curing, 56 ~C then standard steam curing and 90℃ then standard steam curing are separately analyzed from aspects of its strength, hydration products and microstructure. The resuits show that compared with the standard curing, 56℃ steam curing can improve the block＇s strength at each stage, however 90 ℃ steam curing only improve the early block＇s strength and have a negative impact on the later strength. All curing methods can form the compact high-strength iron railings material consisting of quartz, the un-hydrated C3 S and C2S, hy- dration products CH, ettringite and C-S-H gel, but have a different impact on the hydrating and hardening process of the iron railings concrete.
出处
《金属矿山》
CAS
北大核心
2013年第1期161-163,共3页
Metal Mine
基金
商洛学院服务地方专项(编号:12SKY-FWDF008)
关键词
齐大山铁尾矿
混凝土试块
标准养护
蒸汽养护
水化产物
Qidashan iron ore tailings, Concrete block, Standard curing, Steam curing, Hydration products
