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Self-compacting fiber reinforcement active powder concrete and method for making same

A fiber-reinforced, active powder technology, used in climate sustainability, sustainable waste treatment, solid waste management, etc., can solve problems such as materials prone to defects and performance degradation of concrete structures, and achieve improved strength, increased toughness, and wide The effect of the application foreground

Active Publication Date: 2009-08-05
广东利盈投资集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This not only consumes a lot of manpower and material resources, but also the material is prone to defects, which eventually leads to a serious decline in the performance of concrete structures.

Method used

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  • Self-compacting fiber reinforcement active powder concrete and method for making same
  • Self-compacting fiber reinforcement active powder concrete and method for making same
  • Self-compacting fiber reinforcement active powder concrete and method for making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1— Embodiment 4

[0032] Example 1 - Example 4: Steel fiber reinforced self-compacting RPC. See Table 1 for raw materials and specifications, and Table 2 and Table 3 for material ratios and properties.

[0033] Table 1 Raw materials and specifications

[0034] Material Specification or grade source cement PO 42.5 ordinary Portland cement Shanghai Seal Cement Group Silica fume EM920U Elkem International Trading Shanghai Co., Ltd. Quartz powder 300 mesh Anhui Fengyang Fengcheng Powder Material Co., Ltd. Quartz sand 40~70 mesh Anhui Fengyang Fengcheng Powder Material Co., Ltd. Superplasticizer

[0035] Table 2 The ratio of steel fiber reinforced self-compacting RPC of the present invention and comparative examples

[0036]

[0037] Note: The amount of superplasticizer is the mass fraction of the cementitious material, where the cementitious material is the sum of cement and silica fume; the amount of steel fiber is the volumetric amount.

...

Embodiment 5— Embodiment 8

[0041] Example 5 - Example 8: Polypropylene fiber reinforced self-compacting RPC. See Table 1 for raw materials and specifications, and Table 4 for material ratios and properties.

[0042] Table 4 Polypropylene fiber reinforced self-compacting RPC of the present invention and comparative examples

[0043]

[0044] Note: The amount of superplasticizer is the mass fraction of the cementitious material, where the cementitious material is the sum of cement and silica fume; the fiber content is the volume content.

[0045] Table 5 The main properties of polypropylene fiber reinforced self-compacting RPC of the present invention and comparison with ordinary RPC

[0046] Steel fiber content (%)

7 days against stress

(MPa) 7 days anti-bending

(MPa) fold ratio

28 days anti-stress

(MPa) 28 bending resistance

(MPa) fold ratio

comparative example 70.5 11.0 6.4 102.3 14.7 7.0 Example 5 65.8 11.6 5.7 83.7 13.2 6.3 Exampl...

Embodiment 9— Embodiment 12

[0049] Example 9-Example 12: Steel fiber, polypropylene fiber hybrid reinforced self-compacting RPC. See Table 1 for raw materials and specifications, see Table 6 and Table 7 for material ratio and performance.

[0050] Table 6 Hybrid fiber reinforced self-compacting RPC of the present invention and comparative examples

[0051]

[0052] Note: The amount of superplasticizer is the mass fraction of the cementitious material, where the cementitious material is cement and silica fume; the fiber content is the volume content.

[0053] Table 7 Main properties of hybrid fiber reinforced self-compacting RPC of the present invention and comparison with ordinary RPC

[0054] Steel fiber content (%)

[0055] It can be seen from Table 6 and Table 7 that when the fixed steel fiber content is 1.5%, the 7-day flexural strength of concrete increases with the increase of the polypropylene fiber content; for the 28-day performance, the polypropylene content is 0.05 ~0.2% is opti...

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Abstract

The present invention belongs to the building material technology field, in particular to relate to a self-compact strengthened fibre active concrete and the corresponding preparation method. The present invention is made of cement, silicon ash, quartz powder, quartz sand, water reducer and steel fibre or polypropylene fibre or the mixing fibre between the steel fibre and the polypropylene fibre according to the weight ratio. By using the new type water reducer, the present invention makes the concrete not need any vibration when being molded and the concrete can rely on the self weight to be filled in each angle of the building mould. Besides, the concrete can rely on the self weight to reach the compact situation. By using the rational fibre, both the compression strength and the folding strength can be enhanced greatly, especially for the folding strength, the enhanced degree is much greater. And moreover, the tenacity of the RPC is also enhanced greatly. The self-compact strengthened fibre active concrete in the present invention can simplify the manufacturing process greatly and provide much wider application foreground for manufacturing thin-wall products, slight components or other components with novel structure shape.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a self-compacting fiber-reinforced active powder concrete and a preparation method thereof. Background technique [0002] Reactive Powder Concrete (RPC) is a new type of cement-based composite material with ultra-high strength, ultra-high performance, and low porosity. It was first developed by a French research team at the end of the 20th century. It is based on the principle of maximum compactness, removes coarse aggregate, uses fine sand with a maximum particle size of 630μm as aggregate, and is made of cement, ground quartz powder, silica fume and high-efficiency water reducing agent, supplemented by an appropriate maintenance system. into. Due to the increased fineness and reactivity of the components, it is called reactive powder concrete. [0003] Due to its ultra-high strength, excellent durability and impermeability, reactive powder concrete has ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B14/04C04B14/06C04B16/06C04B14/48
CPCC04B28/02Y02W30/91C04B14/06C04B14/48C04B16/0633C04B18/146C04B20/0096C04B2103/302
Inventor 钟世云王亚妹
Owner 广东利盈投资集团有限公司
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