CAJ | 학술논문

通过硬石膏水化率、水化温升、液相离子浓度测定,结合宏观性能试验,对硬石膏基胶结材水化硬化历程,硫酸盐激发剂作用机理,矿渣对硬石膏的改性作用等进行了研究.结果表明:硫酸盐促进硬石膏溶解,提高液相浓度和过饱和度,加快二水石膏晶体成核与生长速率;矿渣水化形成钙矾石与水化硅酸钙等水硬性矿物,使硬石膏硬化体强度与耐水性提高,矿渣水化与硬石膏水化相互促进;采用硫酸盐激发、矿渣改性的硬石膏基胶结材具有强度较高、耐水性较好、干缩率较小的特点,其水化硬化经历了快速溶解反应期、水化潜伏期、加速水化期、稳定水化期和缓慢水化期等5个阶段.胶结材凝结时间取决于潜伏期,加速水化期和稳定水化期是硬化体结构致密和强度发展的主要阶段.
통과경석고수화솔、수화온승、액상리자농도측정,결합굉관성능시험,대경석고기효결재수화경화역정,류산염격발제작용궤리,광사대경석고적개성작용등진행료연구.결과표명:류산염촉진경석고용해,제고액상농도화과포화도,가쾌이수석고정체성핵여생장속솔;광사수화형성개반석여수화규산개등수경성광물,사경석고경화체강도여내수성제고,광사수화여경석고수화상호촉진;채용류산염격발、광사개성적경석고기효결재구유강도교고、내수성교호、간축솔교소적특점,기수화경화경력료쾌속용해반응기、수화잠복기、가속수화기、은정수화기화완만수화기등5개계단.효결재응결시간취결우잠복기,가속수화기화은정수화기시경화체결구치밀화강도발전적주요계단.
The paper presents a study of the hydration and hardening process of anhydrite binder,the activating mechanism of sulfate salt typed activator,and the modifying effects of anhydrite with slag through the determination of hydration rate,temperature-rising and ion concentration in liquid phase of anhydrite in combination with the macro-performance measurements.The addition of sulfate salt promotes the solution of anhydrite,increases ion concentration and supersaturation degree in liquid phase,and accelerates the gypsum crystal nucleation and growth.The hydration of slag forms water rigid minerals such as ettringite and hydrated calcium silicate,and the strength and water-resistance of the anhydrite binder material are accordingly increased.Anhydrite hinder material activated by sulfate salt and modified with slag is characterized by higher strength,good water resistance and low shrinkage rate.The hydration and hardening experience five stages such as rapid dissolution,latency period,hydration accelerated period,domain hydration period and slow hydration period.The setting time of binder material depends on latency period,and the densification and strength development of the hardened anhydrite paste are mainly concentrated at the stage of hydration accelerated period and stable hydration period.