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Unfired self-compacting concrete and preparation method thereof

A self-compacting concrete, unilateral technology, applied in the field of concrete production, can solve the problems of poor self-compacting of non-fired concrete, and achieve the effect of avoiding the increase of liquid phase viscosity, improving dispersion and reducing negative effects

Active Publication Date: 2020-04-14
成都宏基建材股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the technical problem of poor self-compacting properties of non-fired concrete in the prior art, the present invention provides a preparation method of non-fired self-compacted concrete

Method used

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  • Unfired self-compacting concrete and preparation method thereof
  • Unfired self-compacting concrete and preparation method thereof
  • Unfired self-compacting concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Measure each raw material according to the following unilateral dosage ratio:

[0036]

[0037] Among them, the cement is P.OⅡ42.5R ordinary Portland cement, and its specific surface area is 373m 2 / kg, the initial setting time is 170min, the final setting time is 256min, the three-day compressive strength is 31.2MPa, and the 28d compressive strength is 50.1MPa.

[0038] The dolomite coarse aggregate is natural dolomite, CaCO 3 The content is 96.7%, and the particle size is continuously graded from 5 to 20 mm.

[0039] The fine aggregate is machine-made sand obtained after crushing natural dolomite, the stone powder content is 8%, and the fineness modulus is 2.67.

[0040] The fly ash is Class I fly ash of Class F, with a water demand ratio of 95% and a specific surface area of ​​430m 2 / kg, the mineral powder is S95 grade mineral powder, the specific surface area is 435m 2 / kg.

[0041] The polyacrylonitrile-based carbon fiber is a chopped fiber with a leng...

Embodiment 2

[0048] Design according to the same conditions as in Example 1, the difference is only: measure each raw material according to the following unilateral dosage ratio:

[0049]

Embodiment 3

[0051] Design according to the same conditions as in Example 1, the difference is only: measure each raw material according to the following unilateral dosage ratio:

[0052]

[0053]

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Abstract

The invention discloses a preparation method of unfired self-compacting concrete, wherein the unfired self-compacting concrete comprises the following production raw materials: cement, a mineral admixture, water, polyacrylonitrile-based carbon fibers, a water reducing agent, dolomite coarse aggregate and dolomite fine aggregate, wherein the per-square mixing amount of the dolomite coarse aggregateis 756 to 810 kg, and the per-square mixing amount of the dolomite fine aggregate is 835 to 859 kg. According to the invention, the self-compactness of the unfired concrete material is remarkably improved, and the unfired property of the material is further improved.

Description

technical field [0001] The invention relates to a concrete production technology, in particular to a production method of non-fired concrete. Background technique [0002] With the development of economy and society, people pay more and more attention to health and safety issues, and such as LPG stations with flammable materials, factory buildings containing dust fibers, and warehouses for dry flammable materials are common buildings for living and working. If ordinary concrete materials are used, sparks may be generated in the case of impact and friction, causing serious fire and explosion hazards, which is an important factor threatening public safety. Therefore, for buildings with fire and explosion hazards, non-flammable Concrete for construction. [0003] Non-flammability means that when the material used has mechanical action such as friction, impact or impact with hard objects such as metal or stones, no sparks (or sparks) will occur, resulting in the danger of fire ...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B18/08C04B18/12C04B14/386C04B24/383C04B24/24C04B14/28
Inventor 张林涛黄加宝孙远松邓燚张云峰
Owner 成都宏基建材股份有限公司
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