Results 31 to 40 of about 550,572 (226)

Expansion and shrinkage of lightweight vermiculite material at high temperatures [PDF]

open access: yes, 2023
Vermiculite materials are widely used as insulation material in the industry, fire protection systems, and fire stoves. The high dimensional stability of vermiculite boards ensures that thermal runways in the insulation lining are avoided.
Brandstrup Olesen, Martin   +7 more
core   +1 more source

Semihydroponic and ebb-and-flow systems for calla lily cultivation

open access: yesOrnamental Horticulture, 2022
The soilless cultivation of plants is an alternative for the production of flowers with high quality. Calla lily is normally produced on soil benches, but have shown some limitations as bacterial infections occur.
Karina Volpi Furtini Boldrin   +6 more
doaj   +1 more source

Analysis of the thermomechanical behavior of different concretes with vermiculite and submitted to elevated temperatures [PDF]

open access: yesREM: International Engineering Journal
At high temperatures, concrete may exhibit adverse mechanical behavior that compromises the safety of structures. Thus, it is necessary to study and develop concrete that can obtain greater performance in situations of exposure to high temperatures.
Aldo Ribeiro de Carvalho   +5 more
doaj   +1 more source

The Effect of Natural Resin on Thermo-physical Properties of Expanded Vermiculite-Cement Composites

open access: yes, 2020
This study focuses on production of lightweight concrete that presents thermal insulation property. Lightweight concretes were produced using resin-added cement and expanded vermiculite. The rates of expanded vermiculite were determined as 20%, 40%, 60%,
Cay, Vedat Veli, Kocyigit, Fatih
core   +1 more source

Electrophysical properties of composites based on the epoxy resin and expanded graphite

open access: yesХімія, фізика та технологія поверхні, 2018
The composites of epoxy resin-expanded graphite(EG)-vermiculite and epoxy resin-expanded graphite-perlite were obtained and their electrophysical properties were analysed at low frequencies and in the microwave range.
O. G. Sirenko   +4 more
doaj   +1 more source

Chitosan coated - porous low expansion vermiculite for efficient removal of cesium from radioactive wastewater

open access: yesEnvironmental Chemistry and Ecotoxicology, 2021
Radioactive elements have very important applications in practical life and work. The long-lived 137Cs has a half-life of 30.2 years, it is easily absorbed by the human body. At present, the treatment methods of 137Cs are mainly adsorption, ion exchange,
Bo Zhang, Baohua Zhang, Xiaowen Liu
doaj   +1 more source

Performances of vermiculite and perlite based thermal insulation lightweight concretes [PDF]

open access: yesScience of Sintering, 2020
This experimental study was conducted with an aim to investigate the effect of the elevated temperature on the mineral phase composition, microstructure and mechanical properties of the thermal insulation lightweight concretes.
Terzić Anja   +4 more
doaj   +1 more source

Construction and technical properties of vermiculite concrete and fibro vermiculite concrete with volcanic pumice under the influence of elevated temperatures

open access: yesВестник Дагестанского государственного технического университета: Технические науки, 2023
Objective. Development of compositions of vermiculite concrete and fibro vermiculite concrete with volcanic pumice. Investigation of the construction and technical properties of the developed compositions of vermiculite concrete and fibrovermiculite ...
T. A. Khezhev   +4 more
doaj   +1 more source

Efeito da competição e produção de mudas de Quillaja brasiliensis (Sabão-de-soldado) em diferentes substratos

open access: yesRevista Thema, 2015
his paper deals with the production of Quillaja brasiliensis seedlings. An assessment of germination on different substrates was test-ed: vermiculite; coconut fiber; commercial substrate; carbonized rice husk (CAC); CAC + vermiculite and coconut fiber ...
Alexandra Alves Cantos   +4 more
doaj   +1 more source

POSSIBILITY OF USING CRUDE AND EXPANDED VERMICULITE IN CEMENT-BONDED PARTICLEBOARD PRODUCTION

open access: yes, 2023
The aim of this study is to investigate the effect of using vermiculite on the thermal, physical and mechanical properties of cement-bonded particleboards. For this purpose, single-layer cementitious particle boards with a final density of 1200 kg/m3 and
ARAS, UĞUR
core   +1 more source

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