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Low-viscosity low-shrinkage ultra-high performance concrete repairing material and using method thereof

A technology of ultra-high performance and repair materials, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve problems such as poor filling performance and large shrinkage rate

Active Publication Date: 2021-07-30
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a low-viscosity, low-shrinkage ultra-high-performance concrete repair material and its use method to solve the problems that the existing ultra-high-performance concrete has poor filling performance and large shrinkage rate and is not suitable as a repair material

Method used

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  • Low-viscosity low-shrinkage ultra-high performance concrete repairing material and using method thereof

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preparation example Construction

[0046] The preparation method of the above modified mineral blend includes the following steps:

[0047] (1) Press the silane, water by mass (1 to 5): 100 (eg 1: 100, 1.5: 100, 2: 100, 2.5: 100, 3: 100, 3.5: 100, 4: 100, 4.5: 100 , 5: 100) stir mixed and mixed;

[0048] (2) The temperature rises to 60 ~ 90 ° C (e.g. 60 ° C, 65 ° C, 70 ° C, 75 ° C, 80 ° C, 85 ° C, 90 ° C), heat insulation and according to fly ash, water quality ratio (5 ~ 20): 100 (for example, 5: 100, 10: 100, 2: 100, 15: 100, 20: 100) Add fly ash to continue stirring, resulting in a mixture;

[0049] (3) The solid is separated from the mixture, and then the solid is heated, dried, and modified mineral blend.

[0050] In the preparation method of the above modified mineral blend, the silane is a dodecyl trimethoxysilane, a dodecyl oeth, a hexamethyltrimethoxysilane, a hexadalkyethoxysilane, A mixture of one or more of the octadekyltrimethoxysilane and the octadecyloxysilane (ratio is arbitrarily); fly ash is commerc...

Embodiment 1

[0058] The low viscosity of the present embodiment is low-shrinking ultra-high performance concrete repair material, according to the weight of the number, composed of 26 silicate cement, 3 sulfoal saline cement, 5 expansive agents, modified minerals 6 copies, 4 ordinary mineral adhesions, 23 general aggregates, 22 parts of the porous aggregate (according to the water-water weight gauge), water 7 parts, 1 water reducer, 3 steel fibers; total 100 share.

[0059] Among them, the preparation method of modified mineral blend includes the following steps:

[0060] (1) Dodyl trimethoxysilane, water is added to the container and warmed by adding 2: 100.

[0061] (2) The temperature is raised to 80 ° C to maintain the temperature and the water mass is added to the fly ash to continue to be stirred for 1 hour;

[0062] (3) Filming the fly ash after the mixing of step (2) was filtered, and the mineral blend was obtained at 105 ° C for 6 hours in the heater.

[0063] Other components are:

...

Embodiment 2

[0086] The low viscosity of the present embodiment has a low-viscosity of the ultra-high performance concrete repair material, which is composed of a component of the following components: 4 parts of silicate cement, 4 sulphate cement, 4 expansion agents, modified minerals 5 parts of the blend, 5 parts of ordinary mineral blend, 20 normal aggregates, 25 parts of the porous aggregate (according to the water-absorbing weight), 6.5 parts of water, 1.5 parts of water reducer, 5 steel fibers; total 100 share.

[0087] Among them, the preparation method of modified mineral blend includes the following steps:

[0088] (1) Dosaethylethoxysilane, water is added to the container in a ratio of 5: 100 to stir;

[0089] (2) Temperature is raised to 70 ° C and then press the fly ash, the water quality is 20: 100, and the fly ash is added to stir 0.5 hours;

[0090] (3) Filming the fly ash after completion in step (2) is filtered, and the mineral blend is obtained in the heater at 120 ° C for 4 ...

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Abstract

The invention belongs to the technical field of inorganic non-metallic materials, and particularly relates to a low-viscosity low-shrinkage ultra-high-performance concrete repairing material and a using method thereof. The material comprises the following components in parts by weight: 24-28 parts of Portland cement, 2-4 parts of sulphoaluminate cement, 4-5 parts of an expanding agent, 5-7 parts of a modified mineral admixture, 5-7 parts of a common mineral admixture, 20-25 parts of common aggregate, 20-25 parts of porous aggregate, 6-8 parts of water, 1-1.5 parts of a water reducing agent and 0-6 parts of steel fibers, wherein the sum of the parts by weight of all the components is 100, the porous aggregate firstly absorbs water during use, and the weight of the porous aggregate is calculated according to the weight before water absorption. The modified mineral admixture can increase the distance between particles in the slurry, reduce the viscosity of the slurry and improve the working performance of the slurry; and water in the saturated porous aggregate flows to pores under the action of capillary pressure difference between the aggregate and the pores of the concrete, so that the reduction of humidity in the concrete is inhibited, and the shrinkage of the concrete is greatly reduced.

Description

Technical field [0001] The present invention belongs to the technical field of inorganic non-metallic materials, and more particularly to low viscosity low shrink ultra high performance concrete repair materials and methods of use. Background technique [0002] Ultra-high performance concrete is an excellent concrete material. Since the hydrocapings ratio is very low, there is a large amount of active auxiliary gelling material, its strength is fast, and the 1D compressive strength can reach 60 MPa, and the post-intensity continues to grow, and there is no inverting. Further, the high-performance concrete has a low porosity, high resistance to environmental erosion, and also has excellent wear resistance and explosion resistance. Further, the steel fibers increase the limit deformation of super performance concrete to more than 7 times or more of ordinary concrete, so it is suitable as a repair material. [0003] However, there are two problems in ultra-high performance concrete ...

Claims

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Application Information

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IPC IPC(8): C04B28/06C04B20/02C04B111/72C04B18/08
CPCC04B28/065C04B20/023C04B2111/72C04B7/02C04B14/48C04B2103/302C04B22/064C04B22/142C04B18/146C04B14/068C04B18/08C04B18/027C04B22/066C04B18/101C04B14/106C04B14/06C04B14/22Y02W30/91
Inventor 邹定华王东明江梦飞刘园彬霍俊锋黄江歌徐恬昊赵奇胜李云龙王凯
Owner HENAN POLYTECHNIC UNIV
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