Ultra-high performance concrete composition capable of being sprayed for construction

A concrete composition and ultra-high-performance technology, applied in the field of concrete, can solve problems such as low construction efficiency and difficulty in supporting formwork for non-planar ultra-high-performance concrete, and achieve the effects of improving production efficiency, enriching product types, and good fluidity

Pending Publication Date: 2022-02-22
JIANGSU SOBUTE NEW MATERIALS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of non-planar ultra-high-performance concrete formwork difficulty and low construction efficiency, the present in

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1

[0036] Ultra-high performance concrete composition, composite gelation material, thixotropic, stage with fine sand, special fiber, water reduction agent, mass ratio is 600: 1.5: 400: 60: 20; composite The gelling material is a normal silicate 52.5, graylawish ash, and ultrafine ore powder in Yaoyi, is mixed into the mass ratio of 8: 1: 1; the thixotropic agent is montmorillonite; the grades are 20-40 mesh, 40-70 mesh, 70-120 destination quartz sand, the mass percentage of three sands is 10%: 30%: 60%; dedicated fiber is a polyhyset fiber having a length of 12 mm, diameter 0.2 mm; water reducer is Jiangsu Subo The water reduction rate produced by Special Surgery Co., Ltd. was 45% polycarboxylic acid water reduction agent.

Example Embodiment

[0037] Example 2

[0038] Ultra-high performance concrete composition, composite gelation material, thixotropic, grade, fine sand, special fiber, water reducer, mass ratio of 500: 5.0: 500: 10: 18; composite The gelling material is a hoste 52.5, white silicate ash, microbeads in accordance with the mass ratio of 7.5: 2.0: 0.5; the thixotropic agent is a concavestone earth; the grade fragrant sand is 20-40 mesh, 40-70 Entire, 70-120 destination quartz sand, three sand preparations of 0%: 25%: 75%; special fiber is 12 mm long, a mixed use of polyoxymethylene and polyvinyl alcohol fibers in diameter, mass ratio 7: 3; Water reducing agent is a 42% polycarboxylic acid water reduction agent for Jiangsu Soviet New Material Co., Ltd.

Example Embodiment

[0039] Example 3

[0040] Ultra-high performance concrete composition of can be injected, composed of composite gelation materials, thixotropic, stage with fine sand, special fiber, water reducer, mass ratio of 560: 25: 440: 10: 18; composite The gelling material is a hoste 52.5, ultra-fine calcium carbonate, ultra-fine mine powder, white silicate ash is mixed by mass, the mass ratio of the mass ratio of 1.0: 1.0; the thixotropic agent is a concavestonite; It is 20-40 mesh, 40-70 mesh, 70-120 destination quartz sand, three sand preparations of 15%: 15%: 70%; dedicated fiber is 6 mm long, 0.2 mm in diameter is 0.2 mm and the length. 18 mm, diameter 0.35 mm polyvinyl alcohol fibers and 20,000 high zirconium-resistant glass fibers are mixed, mass ratio is 4: 4: 2; water reducer is the reduction in Jiangsu Soviet new material shares The water rate is 40% polycarboxylic acid water repellent.

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Abstract

The invention discloses an ultra-high performance concrete composition capable of being sprayed for construction. The concrete composition disclosed by the invention consists of a composite cementing material, a thixotropic agent, graded fine sand, special fibers and a water reducing agent; the composite cementing material comprises cement and an admixture, the thixotropic agent is a clay mineral with a chain layer structure, the graded fine sand is selected from any one of river sand, quartz sand and machine-made sand, and the special fibers are one or a mixture of two of chopped fibers or continuous high-zirconium alkali-resistant glass fibers in any proportion; and the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent, and the water reducing rate of the water reducing agent is not lower than 40%. Under the condition of ultra-low water-binder ratio, the concrete composition has good fluidity and thixotropy after spraying, does not sag, can be suitable for construction of various spraying devices, can be suitable for construction of vertical surfaces, top surfaces, curved surfaces and other positions of multi-material molds, can be used for preparing ultra-high performance concrete members or decorative products with complex shapes, and has wide application prospects.

Description

technical field [0001] The invention relates to the field of concrete, in particular to an ultra-high performance concrete composition capable of spraying construction. Background technique [0002] Ultra-high performance concrete is suitable for making exterior wall decorative panels because of its excellent mechanical properties and durability, especially the characteristics of bending resistance, low water absorption, high surface compactness, and stain resistance. Conventional pouring methods can only be used to prepare flat decorative panels. Under the background of increasingly complex, refined and large-scale modeling of building exterior decorative panels, it is necessary to prepare slopes, elevations, hyperbolic or multi-curved surfaces, and three-dimensional decorations. It is difficult to realize the direct pouring method, therefore, there is an urgent need to develop a spray-formable UHPC material system. [0003] Patent CN201910627894.X discloses a spray-on ult...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B2201/52C04B18/146C04B18/141C04B14/104C04B14/06C04B16/0616C04B2103/302C04B14/24C04B14/102C04B16/0641C04B14/42C04B14/28Y02W30/91
Inventor 阳知乾沙建芳刘建忠刘加平韩方玉林玮郭飞徐海源黄文聪吕进
Owner JIANGSU SOBUTE NEW MATERIALS
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