Method and device for generating aluminosilicate by modifying basalt fiber surface layer

Abstract

The invention relates to a method and device for modifying a basalt fiber surface layer for concrete anti-cracking enhancement into aluminosilicate. The method comprises the steps of carrying out chemical reaction on the basalt fiber surface layer to generate aluminosilicate substances by using alkyl aluminium; and then oxidatively removing the residual alkyl aluminium of the fiber surface layer by using carbon dioxide gas which contains a small amount of oxygen. The modifying device consists of a spraying groove, an air-drying chamber, an alkyl aluminium groove, a carbon dioxide groove, unreeling shafts for movement of basalt fibers, a steering shaft and a reeling shaft. The method comprises the preparation steps: pulling out basalt fiber heads on one or more unreeling shafts; controllingthe direction via the steering shaft; enabling the basalt fibers to successively enter the spraying groove, the air-drying chamber, the alkyl aluminium groove and the carbon dioxide groove; then connecting the basalt fibers to the reeling shaft; starting the reeling shaft to reel the fibers so as to enable cellosilk to move; successively finishing spraying and washing, hot-air drying, alkyl aluminium reaction and residual alkyl aluminium oxidation; after the fibers are reeled completely, taking down the reeling shaft and placing the reeling shaft in a closed packing material; and isolating the fibers from air during storage.

Description

technical field [0001] The invention relates to a method for surface-modifying basalt fibers used for concrete anti-cracking reinforcement with alkyl aluminum to generate aluminosilicate, and belongs to the technical field of concrete additives. Background technique [0002] Adding fibers to concrete increases the strength of the structure in the early stage of cement setting and still has plasticity. During the further solidification and hardening process, the generation of cracks is greatly reduced, and the deflection and strength of concrete are increased. It is especially suitable for inhibiting the early plastic cracking of concrete. The fibers added to concrete are mainly steel fibers, polyester fibers, basalt fibers, etc. Basalt fiber is an inorganic mineral fiber. It is an amorphous inorganic material made of basalt rock materials composed of oxides such as silica, alumina, calcium oxide, magnesium oxide, iron oxide and titanium dioxide. After high-temperature meltin...

AI Technical Summary

Problems solved by technology

The basalt fiber modification methods disclosed in the application publication numbers CN107311564 A and CN107200516A are to use the viscosity of the silica gel and water glass to bond the basalt fiber and the concrete material together, without forming a whole of the basalt fiber and the concrete, and the anti-cracking effect is improved. Weak, and modified substances need to be configured on site

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