Результаты (
английский) 2:
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The pozzolanic reaction between portlandite and different types of nearly pure natural zeolites was studied.
Analcime, chabazite, phillipsite, mordenite, erionite and clinoptilolite-rich tuffs were mixed with portlandite
and water (1: 1: 2 by weight), and the progress of the pozzolanic reaction was quantitatively determined by
thermogravimetrical analyses from 3 to 180 days.
A thorough characterization of the raw materials was performed by quantitative XRD, XRF, SEM-EDX, BET surface area specific measurements of
, grain-size analyses, Cation Exchange Capacity and FTIR measurements.
The difference in reactivity of the samples containing zeolites with varying Si/Al ratios, as well as between
clinoptilolite-rich samples exchanged with different automotive products is responsible or ground to different grain sizes was assessed.
The results indicate that the external surface area only influences the short-term reactivity, whereas the cation
content has an effect on both the long-and short-term reactivity. The early reactivity of the unexchanged
samples can be explained by these two parameters, but their long-term reactivity is mainly related to the Si/Al
ratio of the zeolites. Samples with rich in zeolites Si react faster then their rich counterparts, Al-.
Ophiolites are the rocks of mantle origin, which got crystallized and consolidated in the podkorovyh depths of the peridotitic melt, and subsequently on the deep faults have a protrusion in near-surface layers of the Earth's crust, bypassing the oceanic environment. The term Ophiolite to use as the title of the giperbazitov, not the Association of ul′traosnovnogo rocks, gabbroidnogo, lava and basalt complex podušečnyh love and deep pelagic clay and siliceous sediments-radiolâritov of the ocean floor.
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