Concrete product containing phosphogypsum fly ash cement and preparation method thereof

A technology of concrete products and fly ash cement, which is applied in manufacturing tools, sustainable waste treatment, solid waste management, etc., can solve the problems of high cement doping and low utilization rate of phosphogypsum, and achieve high social benefits and shorten Coagulation time, low energy consumption effect

Pending Publication Date: 2021-12-03
JIANGSU EFFUL SCIENCE AND TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the utilization rate of phosphogypsum in the above-mentioned patent is low, and the amount of cement doping is high

Method used

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  • Concrete product containing phosphogypsum fly ash cement and preparation method thereof
  • Concrete product containing phosphogypsum fly ash cement and preparation method thereof
  • Concrete product containing phosphogypsum fly ash cement and preparation method thereof

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Embodiment 1

[0050] The present embodiment provides a preparation method of concrete products containing phosphorous gypsum fly ash cement, the preparation method comprising the following steps:

[0051] (1) Wetly grind phosphogypsum and some PO42.5 cement with water until the specific surface area is 500m 2 / kg, the mass ratio of the part PO42.5 cement to the phosphogypsum is 0.015, and the mass ratio of the phosphogypsum to the part PO42.5 cement total mass and water is 6:4; the obtained solid content is 62% Phosphogypsum slurry, obtained after filtration and concentration is phosphogypsum mud with a solid content of 82%;

[0052] (2) The phosphogypsum mud obtained in step (1) is mixed with fly ash, remaining PO42.5 cement, sand, gravel, BASF polycarboxylate water reducer and water, and then pressed or poured into concrete products. After molding, let it stand for 1 day, raise the temperature to 65°C and steam for 1 day, take out the product, soak it in water for 1 day, and seal it with...

Embodiment 2

[0054] The present embodiment provides a preparation method of concrete products containing phosphorous gypsum fly ash cement, the preparation method comprising the following steps:

[0055] (1) Grinding of phosphogypsum: Wetly grind phosphogypsum and some slag portland cement with water until the specific surface area is 465m 2 / kg, the mass ratio of said part of slag Portland cement to said phosphogypsum is 0.01, and the mass ratio of said phosphogypsum and part of slag Portland cement to the total mass of water is 5.5:4; the solid content obtained is 59.7 % of the phosphogypsum slurry, after filtration and concentration, the phosphogypsum mud with a solid content of 79.5% is obtained;

[0056] (2) The phosphogypsum mud obtained in step (1) and fly ash, remaining slag Portland cement, stones, sand, (II) Mix polycarboxylate high-efficiency water reducer and water and stir evenly, press or pour into concrete products, after the concrete products are formed, let them stand fo...

Embodiment 3

[0058] The present embodiment provides a preparation method of concrete products containing phosphorous gypsum fly ash cement, the preparation method comprising the following steps:

[0059] (1) Wet-grind phosphogypsum and some pozzolanic portland cement with water until the specific surface area is 455m 2 / kg, the mass ratio of the part of the pozzolanic portland cement to the phosphogypsum is 0.02, and the mass ratio of the total mass of the phosphogypsum to the part of the pozzolanic portland cement to water is 6.5:4; the solid content is obtained phosphogypsum slurry with a solid content of 81.5% after filtration and concentration;

[0060] (2) The phosphogypsum mud obtained in step (1) is mixed with fly ash, remaining pozzolanic Portland cement, stones, sand, combined polycarboxylate water reducer and water, and then pressed or poured into concrete products. After the product is formed, let it stand for 1 day, heat up to 65°C and steam for 1 day, then take out the produc...

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Abstract

The invention provides a concrete product containing phosphogypsum fly ash cement and a preparation method thereof. The concrete product is prepared from the following raw materials in parts by weight: 130 to 240 parts of phosphogypsum, 125 to 215 parts of fly ash, 45 to 80 parts of silicate cement, 650 to 850 parts of sand, 950 to 1050 parts of stones and 145 to 165 parts of water. According to the concrete product, process waste resources are utilized, the cement consumption is reduced, and environmental protection is facilitated. The preparation method comprises the following steps: adding water into ardealite and part of silicate cement, performing wet grinding to obtain ardealite slurry, filtering and concentrating to obtain ardealite mud; mixing and stirring the ardealite mud, the fly ash, the rest silicate cement, the sand, the stones and the water, pressing or pouring to form a concrete product; and finally, performing product maintenance treatment. According to the preparation method, calcination is not needed, the concrete product is produced through direct wet grinding, the concrete strength is improved, and the setting time is shortened.

Description

technical field [0001] The invention belongs to the technical field of concrete preparation, and relates to a concrete product of phosphorus-containing gypsum fly ash cement and a preparation method thereof. Background technique [0002] In construction engineering, concrete is one of the most widely used and used building materials, with an annual consumption of nearly 4 billion cubic meters, of which cement is one of the important materials that make up concrete, accounting for about 1 / 6 of the total amount of concrete. The raw material for cement production is mainly limestone, and coal and electricity are the fuel and power for its production. The production of cement requires a large amount of energy. With the rapid development of society, the importance of environmental protection is becoming more and more prominent. Therefore, it is necessary to reduce the amount of cement used in the concrete preparation process. It can be mixed with a large amount of fly ash, phosph...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B18/08B28B11/24B28B3/00B28B1/14
CPCC04B28/143C04B18/08B28B1/14B28B3/00B28B11/245C04B2111/00017C04B2201/50C04B7/02C04B14/02C04B14/06C04B2103/302Y02W30/91
Inventor 刘丽娟李山山马红青唐永波
Owner JIANGSU EFFUL SCIENCE AND TECHNOLOGY CO LTD
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