Oil shale ash and fly ash co-doped mineral aggregate concrete and preparation method thereof

A technology for oil shale ash and fly ash is applied in the field of oil shale ash and fly ash compound ore concrete and its preparation, which can solve environmental hazards and restrict the utilization of oil shale slag and fly ash. rate, reduction of concrete strength, etc.

Inactive Publication Date: 2021-08-17
BEIHUA UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above solid waste contains a large amount of toxic or potentially toxic substances, which will seriously pollute the surrounding water sources, land and organisms after being leached or diffused by rainwater, causing harm to the environment.
Although both oil shale ash and fly ash can be used as concrete admixtures, the strength of concrete will decrease as the amount increases, which restricts the utilization of oil shale ash and fly ash How to improve the utilization rate of oil shale ash and fly ash has become an urgent problem to be solved

Method used

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  • Oil shale ash and fly ash co-doped mineral aggregate concrete and preparation method thereof
  • Oil shale ash and fly ash co-doped mineral aggregate concrete and preparation method thereof
  • Oil shale ash and fly ash co-doped mineral aggregate concrete and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0036] The amount of raw material for oil shale gray residue and fumifying gas-doped ore concrete is as follows:

[0037] P.O42.5 140 silicate cement, 60 parts of oil shale gray (an average particle size ≤ 20 μm), 100 fly ash, 715 pieces of quartz sand (particle size 20 ~ 200), 1180 gravel, base Osmest agent (NA 2 O) 6 copies of the polycarboxylic acid water decrease (water reduction rate of ≥ 25%), 155 parts of water.

[0038] Preparation method of oil shale gray residue and flour gray mixed ore concrete:

[0039] (1) First, the oil shale gray residue, alkali-activator, and water reducer are added to the cement mixer, add water, stir for 30 min, and make the oil shale ash slag and alkali activator for sufficient reaction;

[0040] (2) Add fly ash and cement, stir for 30 min, so that fly ash and cement are sufficiently reacted with the mixture in step (1);

[0041] (3) Add quartz sand and gravel, stirred for 10 min, mix all raw materials, and produce oil shaft ash and fly ash. Con...

Embodiment 2

[0043] The amount of raw material for oil shale gray residue and fumifying gas-doped ore concrete is as follows:

[0044] P.O42.5 Silicate cement 130 parts, oil shale ash residue (an average particle size ≤ 20 μm), 90 fly ash, quartz sand (particle size 20 ~ 200 mesh) 715 parts, 1100 gravel, base Osmest agent (NA 2 O) 5 copies of the polycarboxylic acid water decrease (water reduction rate of ≥ 25%), and 170 water.

[0045] Preparation method of oil shale gray residue and flour gray mixed ore concrete:

[0046](1) First addition of the oil shaft ash, the alkali-activator, and the water reducer, stir well, add water, stir for 20 min, and mix the oil shale ash and alkali activator.

[0047] (2) Add fly ash and cement, stir for 40min, so that the fly ash and cement are sufficiently reacted with the mixture in step (1);

[0048] (3) Add quartz sand and gravel, stirred for 10 min, mix all raw materials, and produce oil shaft ash and fly ash. Concrete.

Embodiment 3

[0050] P.O42.5 150 silicate cement, 50 parts of oil shale ash residue (average particle size ≤ 20 μm), 110 fly ash, quartz sand (particle size 20 ~ 200 mesh) 750 parts, 1200 gravel, base Excitation agent (K 2 O) 8 copies of the polycarboxylic acid water-water reduction agent (water moisture ratio ≥ 25%), 150 water.

[0051] Preparation method of oil shale gray residue and flour gray mixed ore concrete:

[0052] (1) First addition of oil shaft ash, alkali-activator and water reduction, mix well, add water, stir for 40min, and stir the oil shale ash slag and alkali activator.

[0053] (2) Add fly ash and cement, stir for 20 min, so that fly ash and cement are sufficiently reacted with the mixture in step (1);

[0054] (3) Add quartz sand and gravel, stir for 15 min, mix all the raw materials, and the oil shale gray slag and fly gray-blended oyster reflection.

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Abstract

The invention discloses an oil shale ash and fly ash co-doped mineral aggregate concrete and a preparation method thereof, and belongs to the technical field of concrete. The oil shale ash and fly ash co-doped mineral aggregate concrete is prepared from the following raw materials in parts by mass: 130 to 150 parts of cement, 50 to 70 parts of oil shale ash, 90 to 110 parts of fly ash, 700 to 750 parts of quartz sand, 1100 to 1200 parts of gravel, 5 to 8 parts of alkali activator, 4 to 6 parts of water reducing agent and 150 to 170 parts of water. By improving the formula of the concrete, all the raw materials in the formula can generate a synergistic effect, so that when the oil shale ash and the fly ash replace a part of cement to prepare the concrete, the strength of the concrete is kept equivalent to that of unreplaced concrete, and the use amount of the cement is greatly saved; meanwhile, the utilization rate of the oil shale ash and the coal ash is increased.

Description

Technical field [0001] The present invention relates to the field of concrete, and more particularly to an oil shale gray residue and a liquid coal ash composite doped blending material concrete and its preparation method thereof. Background technique [0002] In recent years, with the continuous development and utilization of oil shale resources, the amount of oil generated by oil is increased year by year. Due to the low oil content, a large amount of oil shale ash is produced when the oil is burned. With the continuous improvement of environmental protection, the comprehensive utilization of oil shale ash slag has become the top priority of related companies. From other industrial solid waste resource utilization experience, the preparation of building materials is still the best way to prevent this solid waste, in particular to prepare cement-based building materials, but the utilization rate of waste slag is still not high. [0003] Fly ash is the fine gray that is charged f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/08C04B18/06C04B7/24C04B7/26
CPCC04B7/243C04B18/06C04B18/08C04B28/04C04B2111/00017C04B2201/50C04B14/06C04B14/02C04B2103/302C04B22/062Y02W30/91Y02P40/10
Inventor 常广利杨旭姣曲广雷王显利牛伯羽
Owner BEIHUA UNIV
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