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Ditemukan 52 dari pencarian Anda melalui kata kunci: subject="Volcanic"
Perlite: a raw material with industrial potential
Perlite is a glassy yolcanic rock which will upon Tap id and controlled heating, expand or ''pop" into a frothy aterial of low bulk density -valued as a lightweight aggregate. Occurrences and commercial deposits of perli te are iknown throughout the world as well~exposed flows and domes of Tertiary and Quaternary age like most of the -volcanic …
- Edisi
- -
- ISBN/ISSN
- -
- Deskripsi Fisik
- 17 p. : ill. ; 21 cm
- Judul Seri
- -
- No. Panggil
- PMB LU 1981 - 16
Perlite deposits in New-Zealand
Investigations of the acid volcanic rocks in New• Zealand have shown that the must promising perlite deposits are the glassy rhyolites of the Taupo-Rotorua and Tuirua districts. Tl,c Lest-grade rock is at Ongaroto, Maroa, Tairua, and Lake lfotoma. Large quantities …
- Edisi
- -
- ISBN/ISSN
- -
- Deskripsi Fisik
- 21 cm
- Judul Seri
- -
- No. Panggil
- PMB LU 1954 - 2
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