Clean water autodensing concrete almixture

A technology of self-compacting concrete and admixture, which is applied in the field of building materials, can solve the problems that cannot meet the requirements of use, the wall of the facade is narrow, and the facade does not leak water, etc., to achieve dignified and elegant texture, unique visual effect, Uniform color effect

Inactive Publication Date: 2007-07-18
BEIJING HAORAN CONCRETE
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0002] At present, in building construction, self-compacting concrete, as a new type of high-performance concrete, has good workability and can fill the space of dense formwork without vibration. It is suitable for concrete construction projects with deep pouring depth, high reinforcement density and special shape. , but for some projects where the facade wall is narrow, the steel bars are dense and cannot be vibrated, and the facade is required to achieve non-bleeding performance, the existing self-compacting concrete cannot meet the use requirements

Method used

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Experimental program
Comparison scheme
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Embodiment Construction

[0013] Raw materials:

[0014] Cement: Ordinary Portland cement of 42.5 conforming to GB175 standard;

[0015] Sand: river sand with a mud content of less than 1.0 and a fineness modulus of 2.6;

[0016] Stones: The mud content is less than 0.5, and the diameter of the stones can be 5-10mm, or 5-20mm continuous graded stones.

[0017] Fly ash: Class I fly ash that meets national standards;

[0018] Slag powder: S95 grade slag powder that meets the national standard;

[0019] Polycarboxylate high-efficiency water reducer is Sika Viscocrete3390, with a solid content of 27%;

[0020] Sand and stones make up the aggregate, and the sand ratio is 45% to 55%;

[0021] The above-mentioned raw materials are mixed according to the weight group distribution ratio in the following table, and after being stirred by a concrete mixer, the formwork surface is filled and cast into shape.

[0022] Mixing ratio examples are shown in the table below

[0023] match

combine

C...

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PUM

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Abstract

This invention relates to a clean water self-compacting concrete. According to the weight, it includes cement 1 share, water: 0.28 to 0.35, sand: 2.78 to 4.18, stone: 4.18 to 2.78, pulverized coal ash: 0 .34 to 1, slag: 0.34 to 1, carboxylic acid high performance water reducer: 0.021 to 0.043. Advantages of the invention: the concrete has high resistance to disintegrate, not secrete water, but also has high mobility, self-filling templates and pouring shape, gain a high quality compacting concrete; and when construction side use clean water template, concrete surface smooth, color uniform, has better visual effect; after hardening concrete has excellent mechanical and durability properties, the compressive strength can achieve not less than 50 MPa.

Description

technical field [0001] The invention relates to the technical field of building materials, and relates to a clear water self-compacting concrete mixture. Background technique [0002] At present, in building construction, self-compacting concrete, as a new type of high-performance concrete, has good workability and can fill the space of dense formwork without vibration. It is suitable for concrete construction projects with deep pouring depth, high reinforcement density and special shape. , but for some projects where the facade wall is narrow, the steel bars are dense and cannot be vibrated, and the facade is required to achieve non-bleeding performance, the existing self-compacting concrete cannot meet the use requirements. Contents of the invention [0003] The purpose of this utility model is to provide a clear water self-compacting concrete mixture, which has high resistance to segregation, no bleeding, and high fluidity, and can be poured and formed by filling the fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B14/06C04B14/02C04B18/08C04B18/12C04B24/24C04B24/04
CPCY02W30/91
Inventor 孙志强郑子明翟丽娟
Owner BEIJING HAORAN CONCRETE
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