کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6717871 | 503531 | 2016 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preliminary electrochemical cementation of high volume fly ash mortars
ترجمه فارسی عنوان
سیمان سازی الکتروشیمیایی مقادیری از خاکسترهای خاکستر پرتوی
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کلمات کلیدی
خاکستر پرواز فعال سازی قلیایی، مواد سیمان گنبد پلیمر، الکتروشیمی، الکتروتاژنتیک،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی عمران و سازه
چکیده انگلیسی
This paper summarizes a research about the electrochemical activation of the cementitious properties of fly ash. Taking into account that in recent years there have been various environmental issues associated with the production of Portland cement (PC), the use of Fly Ash (FA) has been promoted in the production of concrete. Traditionally, the use of fly ash has been possible through its blending with Portland cement and as a geopolymeric cementitious material. In this research, a third technique for fly ash activation, known as electro-mutagenesis, was investigated. This treatment consisted in the late hydration of fly ash after the migration of ions from an external alkaline solution, by applying an electric field across the hardened mortar. Solutions of sodium hydroxide and sodium silicate with different molar concentrations were used as a source of alkaline ions. The electrical treatment was applied in many mortar samples using high volume proportions of fly ash, a constant water to binder ratio, and a fixed aggregate content. After treatment, the compressive strength, the ultrasonic pulse velocity, and the microstructure of the mortar matrices were investigated. Results showed that the alkaline ions migrated into the hardened mortar through the permeable capillary pores, reacted with the un-hydrated fly ash and mutated in new hydration phases, producing an improvement in the physical properties of mortar.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 122, 30 September 2016, Pages 54-62
Journal: Construction and Building Materials - Volume 122, 30 September 2016, Pages 54-62
نویسندگان
Juan Lizarazo-Marriaga, Fredy GarcÃa, Camilo Higuera,