Ultra-high-performance decorative concrete and preparation method thereof

A decorative concrete and ultra-high-performance technology, applied in the field of green building materials and their preparation, can solve the problems of inability to meet decorative aesthetic effects, dark apparent color, and many pores on the surface, reducing process complexity, improving mechanical properties, Avoid the effect of vibration

Inactive Publication Date: 2018-07-10
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, UHPC is basically gray or dark gray, the apparent color is darker, and the surface is porous and rough, which cannot meet the aesthetic effect of decoration.

Method used

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  • Ultra-high-performance decorative concrete and preparation method thereof
  • Ultra-high-performance decorative concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Select Portland cement 16.1%, industrial waste slag 20.6% (silica fume: slag = 2:3), 0.36% nano-SiO2 and 45.2% yellow sand fine aggregate, mix them in a mixer, and dissolve 0.56% superplasticizer , 0.0025% defoamer and 7.9% water (the above are the mass percentages) are added to the mixer and stirred for 3-5 minutes to make the solid raw materials change from a dispersed state to a viscous slurry state to obtain ultra-high performance decorative concrete. The obtained ultra-high-performance decorative concrete is poured into the mold, and then the surface is covered with a plastic film, and it is cured to 28d age under natural curing conditions.

[0037] The ultra-high-performance decorative concrete texture board is thus obtained. The mortar has good fluidity during preparation, can be self-leveling, and the finished product has good crack resistance. The compressive strength of this batch of samples after 28 days of natural curing is 110 MPa, and the flexural strength ...

Embodiment 2

[0039] Select 20.8% white Portland cement by weight, 25.9% industrial waste (silica fume: zeolite powder: kaolin = 2:1:1), 1% ordinary blue pigment, 0.21% nano-Al 2 o 3 Put 47.9% quartz sand fine aggregate into the blender and mix well, add the mixed solution containing 0.69% water reducer, 0.001% defoamer and 7.56% water into the blender, stir for 3-5min, and make the solid raw material From the dispersed state to the viscous slurry state, disperse 1.5% steel fiber and 0.5% polyvinyl alcohol fiber into the slurry evenly, and continue stirring for 3-5 minutes to obtain ultra-high performance decorative concrete. The obtained ultra-high-performance decorative concrete is poured into the mold, and then the surface is covered with a plastic film, and it is cured to 28d age under natural curing conditions.

[0040] The ultra-high-performance decorative concrete railing is thus obtained. The mortar has good fluidity during preparation and can be self-leveling. Even though the fini...

Embodiment 3

[0042] Choose white portland cement 25.8% by weight, industrial waste slag 22.9% (silica fume: slag: tailings powder = 2:2:1), 2.68% ordinary yellow pigment, 0.84% ​​carbon nanotubes and 50.9% fine tailings sand Put the aggregate into the mixer and mix well, add the mixed liquid containing 0.89% water reducer, 0.0035% defoamer and 8.75% water into the mixer, and stir for 3-5min to make the solid raw material change from dispersed state to viscous In the slurry state, disperse 3% steel fiber and 0.5% glass fiber evenly into the slurry, and continue to stir for 3-5 minutes to obtain ultra-high performance decorative concrete. The obtained ultra-high-performance decorative concrete is poured into the mold, and then the surface is covered with a plastic film, and it is cured to 28d age under natural curing conditions. The result is an ultra-high-performance decorative concrete large-scale slab.

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Abstract

The invention discloses ultra-high-performance decorative concrete and a preparation method thereof. The concrete consists of cement, industrial waste residues, fine aggregates, pigment, a defoamer, ahigh-efficiency water reducing agent, water and fibers. The prepared ultra-high-performance decorative concrete uses an active mineral additive and thus has good grain composition, the mechanical property of the ultra-high-performance decorative concrete is good, the appearance color can also be adjusted randomly, and the decorative concrete has certain decorative and artistic effect while beingused as a load-bearing structure; the prepared ultra-high-performance decorative concrete has excellent mechanical property, durability, decorative property, artistry and construction property; and plasticity of the concrete and constitutional features of the material are fully utilized, appropriate measures are taken during forming of walls and components, and therefore, the surfaces of the wallsand the components have decorative lines, patterns, textures, qualities and colors.

Description

technical field [0001] The invention relates to a green building material and a preparation method thereof, in particular to an ultra-high performance decorative concrete integrated with a decorative structure. Background technique [0002] Concrete structures have dual functions of aesthetic value and spatial expression. Traditionally, concrete is mainly used as a structural material in architecture, and its main function is load-bearing. With the development of green building concepts, concrete with decorative functions has become a research hotspot in recent years. [0003] Fair-faced concrete belongs to a branch of decorative concrete. It belongs to one-time pouring molding without any external decoration. The surface of cast-in-place concrete is directly used as the finish. The surface is smooth and uniform, and the overall appearance is very natural and solemn. However, as a load-bearing structure, it is relatively cumbersome, and it is difficult to make a complex str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/34C04B111/82
CPCC04B28/04C04B2111/343C04B2111/82C04B18/146C04B18/141C04B14/062C04B14/06C04B2103/302C04B2103/50C04B22/002C04B14/047C04B14/106C04B2103/54C04B14/303C04B14/48C04B16/0641C04B18/12C04B14/026C04B14/42
Inventor 赖建中王会芳杨浩若郑晓博王强
Owner NANJING UNIV OF SCI & TECH
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