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Fair-faced structure decorative concrete and preparation method thereof

A decorative and concrete technology, applied in the field of clear water structure decorative concrete and its preparation, to achieve the effect of reducing work intensity, reducing construction connection and installation difficulty, and reducing self-weight

Active Publication Date: 2020-08-07
JIANGSU VOCATIONAL INST OF ARCHITECTURAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Decorative concrete with clear water structure is suitable for the construction of building skin landscaping, building curtain wall contour modeling, complex structure and contour modeling structure, etc. It needs concrete to meet high strength (strength not less than 100MPa), high performance (fluidity, scalability, self-stability) , printability, etc.), no reinforcement, decoration and structural integration, constructability, etc., there are no standards, regulations, manuals, etc. to choose from for its configuration and design, and patents, references, etc. in this regard have been reported. not much

Method used

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  • Fair-faced structure decorative concrete and preparation method thereof
  • Fair-faced structure decorative concrete and preparation method thereof

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preparation example Construction

[0035] In addition, a preparation method of the clear-water structure decorative concrete comprises the following steps;

[0036] ①Prepare the gelling material of formula quantity, stir evenly for later use; weigh the admixture of formula quantity and add it to water, stir evenly for later use;

[0037] ② Weigh the aggregate and alkali-resistant glass fiber of the formula and mix evenly for later use;

[0038] ③Put 80% of the total mass of the spare cementitious material, aggregate, alkali-resistant glass fiber mixture, and admixture aqueous solution into the mixer, and stir for 5 minutes to obtain a mixed base material;

[0039] ④ Disperse the alkali-resistant high-modulus polyethylene fiber and add it to the mixed base material evenly, then add the remaining admixture aqueous solution, and continue stirring for 3 minutes to obtain a clear-water structure decorative concrete. The prepared clear-water structure decorative concrete adopts the 3D printing construction method or...

Embodiment 1

[0042] A clear water structure decorative concrete comprises the following raw materials in parts by mass: 1 part of cementitious material, 1.23 parts of aggregate, 0.025 part of fiber, 0.0115 part of admixture and 0.23 part of water.

[0043] As an improvement, the cementitious material is composed of 0.6 part of cement, 0.15 part of active admixture, 0.18 part of superfine metakaolin and 0.07 part of silicon powder in terms of weight percentage.

[0044]Among them, the cement is 42.5 grade Portland cement that meets the requirements of GB 175;

[0045] Active admixture, active SiO 2 Content ≥ 80%, 7d and 28d activity index not less than 80% and 90% respectively, specific surface area ≥ 420m 2 / kg;

[0046] Ultrafine metakaolin, specific surface area 20500m 2 / kg, activity index ≥ 121;

[0047] Silica fume, 28d activity index 91%, specific surface area 15800m 2 / kg, SiO 2 Content 93%, water demand ratio 93%;

[0048] Among them, the aggregate is composed of river sand ...

Embodiment 2

[0060] A clear water structure decorative concrete comprises the following raw materials in parts by weight: 1 part of cementitious material, 1.12 parts of aggregate, 0.031 part of fiber, 0.0113 part of admixture and 0.25 part of water.

[0061] As an improvement, the cementitious material is composed of 0.55 part of cement, 0.16 part of active admixture, 0.21 part of superfine metakaolin and 0.08 part of silicon powder in terms of weight percentage.

[0062] Among them, the cement is 52.5-grade ordinary Portland cement that meets the requirements of GB 175;

[0063] Active admixture, active SiO 2 Content ≥ 80%, 7d and 28d activity index not less than 80% and 90% respectively, specific surface area ≥ 420m 2 / kg;

[0064] Ultrafine metakaolin, specific surface area 20500m 2 / kg, activity index ≥ 121;

[0065] Silica fume, 28d activity index 91%, specific surface area 15800m 2 / kg, SiO 2 Content 93%, water demand ratio 93%;

[0066] Among them, the aggregate is composed o...

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Abstract

The invention discloses fair-faced structure decorative concrete which is prepared from the following raw materials in parts by mass: 1 part of a cementing material, 1.0 to 1.5 parts of aggregate, 0.02 to 0.045 part of fiber, 0.01 to 0.0135 part of an additive and 0.2 to 0.3 part of water. According to the fair-faced structure decorative concrete, the compressive strength is larger than or equal to 120 MPa, the bending strength is larger than or equal to 20 MPa, the drying shrinkage value is smaller than or equal to 300*10<-6>, the free shrinkage value is smaller than or equal to 650*10<-6>, the expansion degree is 650-750 mm, and the formed concrete is consistent in color and luster and is green-grey in color. The fair-faced structure decorative concrete meets the requirements of structural performance, decorative performance, aesthetic performance and industrial construction performance, can be formed at a time, eliminates plastering, decoration, protection and other process links, reduces the operation intensity, saves materials, and conforms to the characteristic of green construction.

Description

technical field [0001] The invention relates to a clear-water structure decorative concrete and a preparation method thereof, belonging to the technical field of concrete. Background technique [0002] As an ultra-high-strength cement-based material, ultra-high performance concrete (UHPC) has the advantages of ultra-high strength, high toughness, high durability, and good volume stability. Compared with the current commercial concrete, the design, configuration, and construction of ultra-high performance concrete are still immature. In terms of cement selection, admixture selection, and fiber selection, etc., they are still limited to a relatively small range. For example, it is proposed that the strength of cement should not be lower than 52.5MPa, silica fume should be used as admixture, and steel fiber should be used as fiber, which will bring inconvenience to the popularization and application of the technology and increase the cost. [0003] With the advancement of cons...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B111/20C04B14/42C04B16/06
CPCC04B28/04C04B2111/00181C04B2111/2023C04B2201/52C04B2201/50C04B14/106C04B18/146C04B14/06C04B14/068C04B14/42C04B16/0625C04B24/22C04B22/06
Inventor 王军强
Owner JIANGSU VOCATIONAL INST OF ARCHITECTURAL TECH
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