Inorganic high performance fiber composite material and preparation method thereof

Abstract

The invention discloses an inorganic high performance fiber composite material, prepared from the following raw materials in parts by weight: 450-900 parts of cement with the mean grain size of 30-60 mu. m and strength grade not less than 42.5, 180-360 parts of active mineral admixture with the mean grain size of 0.1-60 mu. m, loss on ignition being less than or equal to 3.0 percent, and a 28-day activity index not lower than 90 percent, 70-120 parts of inert admixture with the mean grain size of 0.1-60 mu. m, 850-1250 parts of sand with the continuous grading grain size of 0.16-4.75mm, 25-32 parts of water reducer with a water reducing rate greater than 30 percent, 130-150 parts of water, and 50-120 parts of copper plating end hook-shape steel fiber with the diameter less than 0.20mm and length of 12-14mm. The composite material is relatively low in overall price, uniform in fiber distribution, high in compressive strength and flexural strength, good in tenacity and suitable for being popularized and used in the constructional engineering industry.

Description

technical field [0001] The invention relates to the field of high-performance building materials, in particular to an inorganic high-performance fiber composite material and a preparation method thereof. Background technique [0002] Steel fiber reinforced concrete is a new type of multiphase composite material formed by mixing short steel fibers randomly distributed in ordinary concrete. Compared with ordinary concrete, steel fiber reinforced concrete has good compressive strength, bending strength, Toughness and good anti-seismic and impact resistance are applied in the field of construction engineering. The principle is to combine steel fibers with the concrete hydration product interface to improve the deformation constraint of the hydration product in the three-dimensional direction, thereby increasing the compressive strength. In terms of bending deformation, it is mainly due to the slippage between the interface anchor strength and the steel fiber interface. To a cert...

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Problems solved by technology

The concrete is mixed with ordinary steel fibers to bear the tension of the interface, which can make the compressive strength of the concrete reach more than 150Mpa, and the flexural strength reach more than 17Mpa. However, most of the steel fibers in the concrete structure do not give full play to the advantages of tensile strength. The reason is: in the process of stress, most of the steel fibers fall off from the concrete structure without breaking themselves, and the bonding force between the fiber and the concrete interface is not enough, resulting in a waste of fiber resources