Machine-made sand conditioner for concrete, concrete and preparation method thereof

A technology of sand conditioner and concrete, which is applied in the field of building materials, can solve the problems that machine-made sand cannot be used, and achieve the effect of improving 2h expansion degree, simple composition, and improving 2h slump

Active Publication Date: 2022-06-21
广州砼奇杰建材科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The embodiments of the present disclosure provide a machine-made sand conditioner for concrete, concrete and a preparation method thereof, to solve the problem that machine-made sand cannot be used to completely replace natural sand as concrete fine aggregate due to stone powder contained in machine-made sand

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  • Machine-made sand conditioner for concrete, concrete and preparation method thereof

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preparation example Construction

[0055] In some embodiments, the preparation method of the admixture includes: ball-milling zeolite powder for 30min-1h, adding pumice powder, ball-milling for 1-2h; finally adding fly ash, ball-milling and mixing for 30min-45min. Get the admixture. It is ensured that the pores of the pumice powder can be filled with zeolite powder, the proportion of the pumice powder is increased, the dispersibility of the pumice powder in the concrete is improved, and the pumice powder can be fully contacted and reacted with the cement to improve the performance of the concrete.

[0056] In some embodiments, the weight ratio of admixture to cementitious material is 0.5 to 0.8:1. Reduce cement usage.

[0057] Optionally, the admixture to cementitious material weight ratio is 0.65:1.

[0058] In the embodiment of the present disclosure, the proportion of each component in the concrete can be based on the existing conventional concrete, or can be specifically prepared according to the actual s...

Embodiment 1

[0064] The machine-made sand conditioner, in parts by weight, includes: 40 parts of polycarboxylic acid mother liquor, 20 parts of diethanol monoisopropanolamine, 2 parts of triisopropanolamine, 20 parts of glycerin and 2 parts of sodium sulfate; 916 parts of water.

[0065] The machine-made sand conditioner in Example 1 includes, by weight percentage: 4% of polycarboxylic acid mother liquor, 2% of diethanol monoisopropanolamine, 0.2% of triisopropanolamine, 2% of glycerin and 0.2% of sodium sulfate .

Embodiment 2

[0067] Concrete I, in parts by weight, includes: 180 parts of cementitious materials, 850 parts of coarse aggregates, 1050 parts of fine aggregates, 6.5 parts of water reducer, 2.5 parts of machine-made sand conditioner, 120 parts of admixtures and 160 parts of water.

[0068] Wherein, the artificial sand conditioner of Example 1 was adopted as the artificial sand conditioner. The cementitious material is cement. The coarse aggregate is 1 to 3 stones. The water reducing agent adopts polycarboxylate water reducing agent. The fine aggregate is machine-made sand, wherein the content of stone powder with a particle size of less than 75 μm in the machine-made sand is 20% to 25%.

[0069] The admixture includes fly ash (particle size is not limited), pumice powder (particle size is 1-5 μm) and zeolite powder (particle size is 10-200nm); wherein, the weight ratio of fly ash to pumice powder is 1: 0.6; the weight ratio of fly ash to zeolite powder is 1:0.6. It was prepared by the ...

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Abstract

This application relates to the technical field of building materials, and discloses a machine-made sand conditioner for concrete, including: polycarboxylic acid mother liquor, diethanol monoisopropanolamine, triisopropanolamine, glycerin and sodium sulfate; the solvent is water . The machine-made sand conditioner of the embodiment of the present disclosure has abundant hydroxyl groups, is weakly alkaline, does not contain chloride ions, is non-toxic and non-corrosive, and is a high-performance green environmental protection material. The composition is simple, and the excellent performance can be achieved by adjusting the reasonable ratio of the components. As an admixture for concrete, machine-made sand can be used as the sand material in concrete. No waste liquid is generated, no cleaning is required after stirring, no production wastewater is generated, and no waste gas is generated. The application also discloses a concrete and a preparation method thereof.

Description

technical field [0001] The present application relates to the technical field of building materials, for example, to a machine-made sand conditioner for concrete, concrete and a preparation method thereof. Background technique [0002] Concrete, abbreviated as "concrete": refers to the collective name of engineering composite materials that cement aggregates into a whole by cementing materials. The term concrete usually refers to using cement as cementing material and sand and stone as aggregate; Mixed with water (which may contain admixtures and admixtures) in a certain proportion, the cement concrete obtained by mixing, also known as ordinary concrete, is widely used in civil engineering. Therefore, sand is the main material of concrete composition. [0003] At present, with the increasing amount of sand used in the construction market, the natural sand resources are becoming less and less, and therefore, machine-made sand has emerged. Machine-made sand is artificial san...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/24C04B28/00C04B20/02C04B14/02
CPCC04B40/0039C04B20/023C04B28/00C04B24/24C04B24/122C04B24/02C04B22/147C04B22/002C04B14/02C04B18/08C04B14/16C04B14/047C04B2103/302
Inventor 陈志杰杨文俊刘衍行黄沛文
Owner 广州砼奇杰建材科技有限公司
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