توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Effect of Previously Slacked Lime on Properties of Autoclave Composite Binders
اطلاعات انتشار: World Applied Sciences Journal، بيست و چهارم،شماره۱۱، ۲۰۱۳، سال
تعداد صفحات: ۶
It is found highly exothermic reactions occur at temperatures up to 190°C when slacking of highlyactive lime with water–solid ratio close to the theoretical value. At this moment lime slacking with water as well as with vapor is observed. Heat from slaking can affect the dehydration of gypsum dihydrate to prepare highly soluble [beta]– modification of hemihydrate gypsum and the maximum amount of fine particles. Ultra dispersed slaking products intensively react in autoclave composite binder systems with improving of strength properties. X–ray diffraction (XRD) and differential thermal analysis (DTA) increasing of the number of products of hydrothermal synthesis of crystalline 11Å–tobermorite, hydrated calcium sulfosilicate Ca3Si(SO4)2 (OH)6 9H2O and amorphous C–S–H structures. Additional crystalline formations completely cover the quartz particles by fibrous–diverse coat and amorphous growths provide extra compaction of crystalline composite block with the structure reinforcing.

۲Application of Natural Aluminosilicates in Autoclave Cellular Concrete
اطلاعات انتشار: World Applied Sciences Journal، بيست و پنجم،شماره۱، ۲۰۱۳، سال
تعداد صفحات: ۷
In the article a part of the quartz component in autoclave cellular concretes has been replaced by aluminum silicate rock – perlite. In contrast to quartz sand the perlite rock consists of nano–sized glass phase, which determines its pozzolanic activity. With X–ray diffraction (XRD) analysis, infrared spectroscopy (IR spectroscopy), microscopy equipment mechanisms of interaction between components of the binder is established. Aluminosilicate rocks in the highly alkaline binders are actively involved in the structural and phase transformations during hydration and hardening of silicate binder producing a predominantly low–basic hydrated calcium silicates – 11Å–(Al)–tobermorite, hydrated calcium silicates with amorphous structure. The cation exchange capacity of the perlite is the main characteristic of zeolite synthesisof L–K11.7 (Al1.8Si34.2O72) type that is an analogue of rock–forming minerals of the lithosphere. The proposed mechanisms allow improving the physical and mechanical characteristics of autoclave cellular concretes resulting increasing in strength value by 35%, decreasing in density by 20% and prediction of their durability.
نمایش نتایج ۱ تا ۲ از میان ۲ نتیجه