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Green environmentally-friendly broken stone active powder concrete

An active powder, green and environmentally friendly technology, applied in the field of concrete, can solve the problems of restricting the use and development of RPC materials, high viscosity coefficient of concrete, and difficulty in forming self-compacting, etc., to increase self-compacting performance, reduce excessive heat of hydration, The effect of reducing usage

Active Publication Date: 2015-02-25
黄贺明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high cost of concrete raw materials at this stage, the use of quartz sand, fine quartz sand powder and cement, the large viscosity coefficient of concrete, high heat of hydration, difficulty in forming self-compacting, and easy formation of efflorescence (frost) on the surface of concrete, etc. Disadvantages, which limit the wide use and development of RPC materials in engineering

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Prepare concrete raw materials according to the following mass ratios:

[0043] 515 parts of low-alkali Portland cement or ordinary Portland cement with an average particle size of 30-60 μm;

[0044] Average particle size 0.18μm, SiO 2 128 parts of silica fume with content ≥85%;

[0045] 115 parts of Class I fly ash with an average particle size of 10-20 μm (calcium oxide content ≤ 10%);

[0046] 115 parts of mineral powder above S95 grade with an average particle size of 10-30 μm;

[0047] 560 parts of quartz sand with a particle size of 0.16~1.63mm;

[0048] 840 parts of stones with a particle size of 5-14mm (crushing index less than 10, needle flake content less than 5%, mud content less than 0.5%);

[0049] 17 parts of composite high-efficiency water-reducing agent with a water-reducing rate greater than 30% (defoamer: air-entraining agent: synergist: water-reducing agent is 0.02:0.005:0.25:1);

[0050] 9 parts of rust inhibitor (triethanolamine borate and orga...

Embodiment 2

[0073] Prepare concrete raw materials according to the following proportions:

[0074] 485 parts of low-alkali Portland cement or ordinary Portland cement with an average particle size of 30-60 μm;

[0075] Average particle size 0.18μm, SiO 2 105 parts of silica fume with content ≥85%;

[0076] 130 parts of Class I fly ash with an average particle size of 10-20 μm (calcium oxide content ≤ 10%);

[0077] 130 parts of mineral powder above S95 grade with an average particle size of 10-30 μm;

[0078] 510 parts of quartz sand with a particle size of 0.16~1.63mm;

[0079] 880 pieces of stones with a particle size of 5-14mm (crushing index less than 10, needle flake content less than 5%, mud content less than 0.5%);

[0080] 15 parts of composite high-efficiency water-reducing agent with a water-reducing rate greater than 30% (defoamer: air-entraining agent: synergist: water-reducing agent is 0.02:0.005:0.25:1)

[0081] 7 parts of rust inhibitor (triethanolamine borate and orga...

Embodiment 3

[0098] Prepare concrete raw materials according to the following proportions:

[0099] 580 parts of low-alkali Portland cement or ordinary Portland cement with an average particle size of 30-60 μm;

[0100] Average particle size 0.18μm, SiO 2 145 parts of silica fume with content ≥85%;

[0101] 105 parts of Class I fly ash with an average particle size of 10-20 μm (calcium oxide content ≤ 10%);

[0102] 105 parts of mineral powder above S95 grade with an average particle size of 10-30 μm;

[0103] 590 parts of quartz sand with a particle size of 0.16~1.63mm;

[0104] 795 pieces of stones with a particle size of 5-14mm (crushing index less than 10, needle flake content less than 5%, mud content less than 0.5%);

[0105] 18 parts of composite high-efficiency water reducer with water reducing rate greater than 30% (defoamer: air-entraining agent: synergist: water reducer is 0.02:0.005:0.25:1);

[0106] 12 parts of rust inhibitor (triethanolamine borate and organic silicone c...

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Abstract

The invention discloses green environmentally-friendly broken stone active powder concrete. The green environmentally-friendly broken stone active powder concrete is prepared from 485 to 580 weight parts of ordinary portland cement or low-alkaline portland cement having the average grain diameter of 30 to 60 microns, 105 to 145 weight parts of silica fume having the average grain diameter of 0.18 microns and SiO2 content greater than or equal to 85%, 100 to 130 weight parts of I-grade coal ash having the average grain diameter of 10 to 20 microns, 100 to 130 weight parts of more than S95 grade of slag powder having the average grain diameter of 10 to 30 microns, 510 to 590 weight parts of quartz sand having the grain diameter of 0.16 to 1.63 millimeters, 795 to 880 weight parts of crushed stone having the grain diameter of 5 to 14 millimeters, 15 to 18 weight parts of a composite high-efficiency water reducer having a water-reducing rate more than 30%, 7 to 12 weight parts of a corrosion inhibitor, 136 to 165 weight parts of water, and 80 to 160 weight parts of copper-coated steel fibers having the diameter of 0.18 to 0.25 millimeters and the length of 10 to 15 millimeters. The green environmentally-friendly broken stone active powder concrete has a low composite cost and wide raw material sources, adopts a large amount of industrial waste materials, has good chemical corrosion resistance, good carbonization resistance, good freeze thawing resistance, high compressive strength and flexural strength, and good self-sealing performances, reduces hydration heat and workability adjustment ranges, and satisfies different process requirements.

Description

technical field [0001] The invention belongs to the technical field of concrete, and in particular relates to a green and environment-friendly gravel active powder concrete. Background technique [0002] RPC (Reactive Powder Concrete) is a new type of concrete material with ultra-high strength, high toughness, high durability and stable volume developed by Western countries such as France in the early 1990s. The performance of this material is divided into 200MPa and 800MPa class. At present, the main application and promotion level in foreign countries is 200MPa, the performance compressive index can reach 130~200MPA, the flexural strength can reach 16~50MPA, the elastic modulus is above 45GPa, the impermeability performance is generally above P30, and the carbonization detection in 28 days is 0 , The electric flux is less than 40 coulombs. In China, RPC materials have been continuously researched and developed, and are used in railway engineering and bridge prefabricatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04
CPCY02W30/91
Inventor 黄贺明刘福财
Owner 黄贺明
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