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Active macadam powder concrete

A technology of active powder and concrete, which is 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., so as to increase self-compacting performance, reduce excessive heat of hydration, reduce The effect of usage

Inactive Publication Date: 2019-03-01
安徽金兄弟环保科技股份有限公司
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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] 128 parts of silica fume with an average particle size of 0.18 μm and a SiO2 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 10~30μm;

[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 reducer with a water reducing rate greater than 30% (defoamer: air-entraining agent: synergist: water reducer is 0.02: 0.005: 0.25: 1);

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

Embodiment 2

[0072] Prepare concrete raw materials according to the following proportions:

[0073] 485 parts of low-alkali Portland cement or ordinary Portland cement with an average particle size of 30-60 μm;

[0074] 105 parts of silica fume with an average particle size of 0.18 μm and a SiO2 content ≥ 85%;

[0075] 130 parts of Class I fly ash with an average particle size of 10-20 μm (calcium oxide content ≤ 10%);

[0076] 130 parts of mineral powder above S95 grade with an average particle size of 10~30μm;

[0077] 510 parts of quartz sand with a particle size of 0.16~1.63mm;

[0078] 880 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%);

[0079] 15 parts of composite high-efficiency water reducing agent with water reducing rate greater than 30% (defoamer: air-entraining agent: synergist: water reducing agent is 0.02: 0.005: 0.25: 1) rust inhibitor 7 parts (triethanolamine borate and organi...

Embodiment 3

[0096] Prepare concrete raw materials according to the following proportions:

[0097] 580 parts of low-alkali Portland cement or ordinary Portland cement with an average particle size of 30-60 μm;

[0098] 145 parts of silica fume with an average particle size of 0.18 μm and a SiO2 content ≥ 85%;

[0099] 105 parts of Class I fly ash with an average particle size of 10-20 μm (calcium oxide content ≤ 10%);

[0100] 105 parts of mineral powder above S95 grade with an average particle size of 10~30μm;

[0101] 590 parts of quartz sand with a particle size of 0.16~1.63mm;

[0102] 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%);

[0103] 18 parts of composite high-efficiency water reducer with a water reducing rate greater than 30% (defoamer: air-entraining agent: synergist: water reducer is 0.02: 0.005: 0.25: 1);

[0104] 12 parts of rust inhibitor (triethanolamine borate and org...

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Abstract

The invention discloses active macadam powder concrete which is made of the following raw materials in parts by mass: 485-580 parts of low-alkali Portland cement or common Portland cement of which theaverage particle size is 30-60mu m, 105-145 parts of silica fume of which the average particle size is 0.18mu m and the SiO2 content is greater than or equal to 85%, 100-130 parts of grade-I coal ashof which the average particle size is 10-20mu m, 100-130 parts of ore powder of a grade S95 or greater that the average particle size is 10-30mu m, 510-590 parts of quartz sand of which the particlesize is 0.16-1.63mm, 795-880 parts of macadam of which the particle size is 5-14mm, 15-18 parts of a composite efficient water reduction agent of which the water reduction rate is greater than 30%, 7-12 parts of a rusting retardant, 136-165 parts of water, and 80-160 parts of a copper-plated steel fiber of which the diameter is 0.18-0.25mm and the length is 10-15mm. The concrete is low in compressive manufacturing cost, wide in material source, large in industrial waste mixing amount, good in chemical corrosion resistance, carbon resistance, freeze thawing resistance and self-compaction property, high in compression and folding strength, low in hydration heat, large in working degree adjustment range and applicable to different construction process requirements.

Description

technical field [0001] The invention belongs to the technical field of concrete, and in particular relates to a 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 is generally above P30, and the carbonization detection is 0 within 28 days. , 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 prefabrication. [0003] Due to the superior perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/20C04B111/76
CPCC04B28/04C04B2111/00017C04B2111/00293C04B2111/20C04B2111/76C04B2201/20C04B2201/50C04B18/146C04B18/08C04B14/02C04B14/06C04B2103/302C04B2103/61C04B14/48C04B2103/50C04B2103/304
Inventor 马安岭
Owner 安徽金兄弟环保科技股份有限公司
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