Preparation method of durable high-strength composite concrete expansive material

A high-strength concrete technology, applied in the field of expansion agent, can solve the problems of poor durability and achieve the effect of improving durability and compensating shrinkage

Inactive Publication Date: 2019-01-04
FOSHAN CHAOHONG NEW MATERIAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the problem of poor durability of existing expansion agent materials, a preparation method of durable high-strength composite concrete expansion agent material is provided

Method used

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  • Preparation method of durable high-strength composite concrete expansive material

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Embodiment Construction

[0016] Take the sepiolite and wash it, dry it, and ball mill it for 10-12 hours, collect the ball-milled particles, mix the ball-milled particles with 0.1% hydrochloric acid in a mass fraction of 1:5, and place them at 75-80°C for 10-12 hours. Let stand to cool to room temperature, then centrifuge at 1200-1500r / min for 10-15min, collect the lower sediment and mix the lower sediment, blast furnace slag and composite magnesium oxide particles according to the mass ratio of 1:1:1, and ball mill for 1- After 2 hours, collect the mixed ball milling particles and place them in a crucible, place the crucible at 120-125°C and dry for 3-5 hours, then raise the temperature at 5°C / min to 1400-1500°C, heat-preserve and calcinate for 1-2 hours, collect and melt Liquid and wire-drawing treatment, the drawn fiber was collected and naturally cooled to room temperature to obtain modified fiber; in parts by weight, weigh 45-50 parts of acrylamide, 0.1-0.2 parts of cross-linking agent dicumyl per...

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Abstract

The invention relates to a preparation method of a durable high-strength composite concrete expansive material and belongs to the technical field of expansive agents. The preparation method includes:using raw powder of sepiolite as a raw material, modifying the raw material by acidolysis so that sepiolite fiber tows are stripped from particles of the powder, combining the sepiolite fiber tows with blast furnace slag to form high-specific-surface-area fiber tow aggregate by melt drawing, making a network framework with the aggregate while chemical stability and mechanical strength of the blastfurnace dry slag fibers are maintained. Pores among the composite fibers support water-absorbing gel to fill the material herein; the material can effectively absorb water and be expansively modifiedduring use. Composite magnesia is used herein, early expansion of the composite magnesia provides sufficient expansion, the composite magnesia can react continuously later to expand, concrete structure damage due to stress relaxation caused by excessive early expansion is avoided, contraction of concrete can be compensated, and durability of the expansive material herein can be effectively improved.

Description

technical field [0001] The invention relates to a preparation method of a durable high-strength composite concrete expansion agent material, which belongs to the technical field of expansion agents. Background technique [0002] Concrete is the most widely used building material in modern times and the largest man-made material at present. With the continuous progress of science and technology, it is also being studied in depth, and its performance has been continuously improved and developed. However, compared with other materials, concrete has the following two inherent material characteristics. One is that the strength increases during the hydration hardening process accompanied by volume shrinkage deformation. The other is that the tensile and compressive strength of concrete is relatively low, that is, the axial The axial tensile strength is much lower than the axial compressive strength. When the tensile stress inside the concrete caused by shrinkage deformation excee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/26C04B14/46C03C13/06
CPCC03C13/06C04B14/4675C04B40/0039C04B24/2652
Inventor 刘菊花韩桂林
Owner FOSHAN CHAOHONG NEW MATERIAL TECH CO LTD
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