What is the meaning of vermiculite concrete?
Vermiculite concrete is a low density non-structural construction product. It is insulating (both thermally and acoustically) and intrinsically fire resistant. It is normally made simply by mixing exfoliated vermiculite as the aggregate, with cement and water, plus additives such as plasticisers if required.
What is vermiculite in construction?
In the construction industry, vermiculite is used to manufacture building boards, plasters, loose-fill insulation and lightweight concrete floors and roofs. When used in homes and commercial buildings, it helps improve fire resistance and provides insulation against heat, cold, moisture and sound.
What are some characteristics of vermiculite?
Chemical Characteristics— Vermiculite is a neutral clay, with a pH of 7.0–7.5 and low EC. This clay type contains two tetrahedral sheets for every octahedral sheet. Like the raw material, it has a permanent negative charge. Consequently, it has a CEC value of 15–21 cmol/kg and a buffering capacity for pH and cations.
What does vermiculite mean?
: any of various micaceous minerals that are hydrous silicates resulting usually from expansion of the granules of mica at high temperatures to give a lightweight highly water-absorbent material.
What is the purpose of vermiculite?
Vermiculite helps to aerate soil while simultaneously retaining water and nutrients, which it then releases over time. Vermiculite is therefore useful in seed sowing and propagation. It can also be added to house plant compost.
What are the advantages of vermiculite?
Vermiculite is always used in the horticultural sector in its exfoliated form and it has the benefits of improving soil aeration while retaining moisture and nutrients to feed roots, cuttings and seeds for faster, maximum growth.
Can you use vermiculite in cement?
Vermiculite Insulating Cement Lightweight cement made with exfoliated vermiculite ultra-lightweight aggregate. This material is about 20% of the weight of normal cement mixes and 25 mm of this material is equivalent to 500mm of normal cement in insulation value.
What is true vermiculite?
Vermiculite is a naturally occurring mineral that expands when heated. Technically, vermiculite is a hydrated magnesium iron aluminium silicate mineral in the form of shiny flakes, which are usually golden brown to blackish in colour. Vermiculite is expanded (exfoliated) by heating the crude flaky mineral.
What does vermiculite spell?
vermiculite. / (vɜːˈmɪkjʊˌlaɪt) / noun. any of a group of micaceous minerals consisting mainly of hydrated silicate of magnesium, aluminium, and iron: on heating they expand and exfoliate and in this form are used in heat and sound insulation, fireproofing, and as a bedding medium for young plants.
What is Paralite?
Perlite is an amorphous volcanic glass that has a relatively high water content, typically formed by the hydration of obsidian. It occurs naturally and has the unusual property of greatly expanding when heated sufficiently.
Which is the best description of vermiculite concrete?
Vermiculite Concrete. Introduction. Vermiculite concrete is a low density non-structural construction product. It is insulating (both thermally and acoustically) and intrinsically fire resistant.
What happens to vermiculite when it is heated?
Vermiculite is a hydrous phyllosilicate mineral. It undergoes significant expansion when heated. Exfoliation occurs when the mineral is heated sufficiently, and the effect is routinely produced in commercial furnaces.
Why is vermiculite used as a roof screed?
Vermiculite concrete roof screeds are specified for the insulation of flat, low pitched and shell roofs. They are used to conserve heat in winter and keep the building cool in summer, and reduce structural movement in the roof caused by solar heat. Roof screeds offer many advantages:
Can you use vermiculite on a wood deck?
Vermiculite concrete is suitable for installation over most structurally sound roofing systems with structural decks of concrete, metal, or wood. Care must be taken to properly vent decks poured over impervious materials.