Binding Compositions Using Vermiculite for Heat Protective Solutions

Abstract

The study of cement mortars containing expanded vermiculite as a filler is presented. The use of vermiculite up to 30% or more leads to good thermal insulation properties of solution, but low compressive strength. Features of the nature of expanded vermiculite contribute to reducing the density and providing heat-shielding properties. Mechanical activation of binder compositions depending on the duration of treatment in a vibrating mill compositions: Portland cement 90-70%, vermiculite 10-30%, allow to obtain a density in the range of 1720-1933 kg/m3, with a strength of 42.8-58.2 MPa, while saving up to 10 - 20% of expensive energy-intensive cement. Cement stone from binder compositions is created due to the form ation of a spatial framework created by a porous mineral filler, which, due to its high dispersion, occupies a significant spatial volume and a crystalline structure is formed on this mineral filler, as on substrates, created by calcium hydrosilicates and hydroaluminates. It builds up a secondary framework with crystalline neoplasms on finely dispersed vermiculite grains - plates. The developed binder has a porous structure due to the introduction of vermiculite filler, which reduces the thermal conductivity of the created composite. The use of the resulting binder compositions prepared from a mixture of Portland cement and vermiculite, in combination with a porous filler - expanded vermiculite, allows obtaining a heat-insulating mortar with high heat-shielding performance and guaranteed strength

Influence of the Chemical Composition of Kulantau Vermiculite on the Structure of Modified Bitumen Compositions

“…Expanded vermiculite, i.e., subjected to heat treatment, is used with great economic effect in various industries. Expanded vermiculite does not burn, does not rot, is chemically inert, durable, bioresistant, completely explosion-and fire-proof, environmentally friendly, has a beautiful golden color, has ion-exchange and sorption properties, and a high ability to absorb and retain liquids and gases [1][2][3][4][5][6][7].…”