Early reactivity of sodium silicate-activated slag pastes and its impact on rheological properties
نویسندگان
چکیده
The fast loss of fluidity sodium silicate-activated slag (SS-AAS) systems have been widely studied in the literature. In this study, rheology these cements has correlated with evolution reaction products formed over time. For purpose, a combination experimental characterization techniques, to study pore solution composition and microstructure SS-AAS pastes thermodynamic calculations applied. initial precipitation ill-defined N-A-S-H C-N-A-S-H producta leads increase storage modulus after 40 min reaction. These are from Na+ ions silicate activator Ca2+ aluminate species dissolved slag. However, when shear is applied, structure breaks down recovered, that infers attractive forces between particles low at early stages hydration.
منابع مشابه
the geopolitics of afghanistan after september 11, 2001, and its impact on iranian national security
abstract u.s. attack to afghanistan after 9/11 provided opportunities for us who tried to become the dominant power after collapse of ussr and bipolar world. thinkers like fukuyama believed american liberal democrats thought would be universally accepted without resistances. liberal democracy is the best and final model of governance; in this regard, united state has moral responsibilities for...
15 صفحه اولan investigation of the impact of self monitoring on langauge teachers motivational practice and its effect on learners motivation
the central purpose of this study was to conduct a case study about the role of self monitoring in teacher’s use of motivational strategies. furthermore it focused on how these strategies affected students’ motivational behavior. although many studies have been done to investigate teachers’ motivational strategies use (cheng & d?rnyei, 2007; d?rnyei & csizer, 1998; green, 2001, guilloteaux & d?...
Study on the Optical and Rheological properties of polymer- layered Silicate Nanocomposites
This review reports recent advances in the field of polymer–layered silicate nano composites. Thesematerials have attracted both academic and industrial attention because they exhibit dramaticimprovement in properties at very low filler contents. Herein, the structure, preparation andproperties of polymer–layered silicate nanocomposites are discussed in general, and finally the effectof clay na...
متن کاملextraction and acetylation of purified trypsin from bovin pancreas and study of some its physico-chemical properties
آنزیم تریپسین در شرایط قلیایی ناپایدار می باشد .و فعالیت پروتئولیتیکی تریپسین منجربه خود هضمی آن در جایگاههای خاصی می گردد. بنابر این آنزیمی با ناپایداری بالا محسوب میگردد. در سالهای اخیر موفق شدند که با ایجاد تغیرات شیمیایی با اضافه کردن فلزات خاص ، کلسیم و یا عمل استیلاسیون منجر به افزایش پایداری آنزیم تریپسین گردند. مطالعات در حال حاضر نشان می دهد که تریپسین استیله شده فعالیت آنزیمی خود را ...
15 صفحه اولذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Cement and Concrete Research
سال: 2021
ISSN: ['0008-8846', '1873-3948']
DOI: https://doi.org/10.1016/j.cemconres.2020.106302