expanded vermiculite

exfoliated vermiculite

Vermiculite which has been expanded, by a heat process, to many times its original volume; suitable for lightweight aggregate, particularly for insulating purposes; used as a thermal insulation.
References in periodicals archive ?
The following substrates were used: S1--composed of sphagnum peat and expanded vermiculite (SP + EV); S2--composed of pinus bark and expanded vermiculite (PB + EV); S3--composition of pine bark and coconut fiber (PB + CF); S4--Surface horizon of an Argisol.
Micropropagated seedlings with a mean of four roots and two leaves (approximately 3.25cm each root, and 2.10cm each leaf) and bulbs with a 4.7mm diameter were transplanted to 50-cells polyethylene trays of 50cm3 each containing each the following substrates: T1: expanded vermiculite, T2: carbonized rice husk (CRH), T3: commercial 1 (according to specifications on the label, composed of Sphagno peat, expanded vermiculite, CRH, dolomitic limestone, gypsum and NPK fertilizer), T4: coconut fiber, and T5: composted Pinus bark.
The substrates analyzed were: coconut shell fiber, phenolic foam and expanded vermiculite. Each cultivation system had 16 profiles, with three plots.
Their main raw materials are calcium silicate, expanded vermiculite, perlite, cellulose, diatomaceous earth, and expanded polystyrene.
Abstract The effects of expanded vermiculite (EV) as modified filler to improve fire protection of intumescent fireproof coatings have been studied.
Commercial expanded vermiculite from South Africa (sample S0), fraction size 1 mm, was provided by Romico Polska Sp.
The effects of various liner materials, such as bentonite, natural zeolite, expanded vermiculite, and pumice on the removal of Cu(II) and Zn(II) are examined.
In 1980, 4.4% of a cohort of 513 Ohio manufacturing workers exposed to expanded vermiculite and/or concentrate from Libby was found to have pleural changes documented on chest radiograph (Lockey et al.
10 JOURNAL OF GEOPHYSICAL RESEARCH that they tried out numerous different materials for their model Phobos, including expanded vermiculite (Kitty Litter in this case, Melosh says), silica sand and small glass spheres.
The substrates were: coconut shell fiber with crushed stone #3 (CFCS3), phenolic foam (PF), expanded vermiculite (EV) and zeolite (Z).
The Biomix[R] substrate is a commercial product used for the production of vegetable seedlings that comprise spine bark, expanded vermiculite, and an organic compound, with a pH of 6.2, water retention capacity of 50%, and dry density of 350kg[m.sup.-3].
Expanded vermiculite was used as a starting material for preparation of acid modified samples according to the following procedure: