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A kind of degradable phosphate cement-based aggregate with fertilizer effect slow-release performance and preparation method thereof

A technology of phosphate cement and slow-release performance, which is used in matrix fertilizers, fertilizer mixtures, fertilization devices, etc., can solve the problems of concrete cracking, inability to meet plant needs, porosity reduction, etc., and achieves increased ammonia concentration and loose structure. , the effect of high activity

Active Publication Date: 2021-09-21
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the concrete has been in service for a period of time, the roots of the plants and the sediment washed by the rainwater enter the interior of the concrete, resulting in a decrease in porosity, which causes concrete cracking
At the same time, the fertilizer applied to planting plants is also becoming thinner under the action of rainwater erosion and plant absorption, which cannot meet the needs of plants; therefore, further research is needed on plant-growing ecological concrete with fertilizer-efficiency slow-release properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for preparing a degradable phosphate cement-based aggregate with fertilizer effect slow-release performance, comprising the steps of:

[0034] (1) Mix 2 parts of molasses, 6 parts of soluble starch and 5 parts of water evenly, then add 75 parts of citric acid powder (add in 2 times), stir for 15 minutes, dry at 60°C for 10 minutes, and then grind Obtain coated citric acid in 10 minutes;

[0035] (2) Slowly stir 40 parts of magnesium chloride, 15 parts of ammonium dihydrogen phosphate, 17 parts of water, 5 parts of glucose and 2 parts of sodium fatty acid in a closed container at 15°C for 10 minutes, then feed ammonia gas until the pH value is adjusted to 8.8 , and then stir rapidly until flocculent magnesium ammonium phosphate hexahydrate precipitates appear, filter, dry and grind for 10 minutes to obtain magnesium ammonium phosphate hexahydrate powder;

[0036] (3) Stir 5 parts of water-absorbing resin and 15 parts of water for 5 minutes, add 50 parts of magn...

Embodiment 2

[0038] A method for preparing a degradable phosphate cement-based aggregate with fertilizer effect slow-release performance, comprising the steps of:

[0039] (1) Mix 5 parts of molasses, 15 parts of soluble starch and 10 parts of water evenly, then add 85 parts of citric acid powder (add in 6 times), stir for 60 minutes, dry at 80°C for 30 minutes, and then grind Obtain coated citric acid in 30 minutes;

[0040](2) Slowly stir 55 parts of magnesium chloride, 25 parts of ammonium dihydrogen phosphate, 38 parts of water, 12 parts of glucose and 8 parts of fatty acid sodium in a closed container at 3°C ​​for 20 minutes, then feed ammonia gas until the pH value is adjusted to 10.2 , then stir rapidly until flocculent magnesium ammonium phosphate hexahydrate precipitates appear, filter, dry and grind for 30 minutes to obtain magnesium ammonium phosphate hexahydrate powder;

[0041] (3) Stir 10 parts of water-absorbent resin and 25 parts of water for 10 minutes, add 75 parts of ma...

Embodiment 3

[0043] A method for preparing a degradable phosphate cement-based aggregate with fertilizer effect slow-release performance, comprising the steps of:

[0044] (1) Mix 3 parts of molasses, 10 parts of soluble starch and 8 parts of water evenly, then add 82 parts of citric acid powder (add in 5 times), stir for 30 minutes, dry at 75°C for 15 minutes, and then grind Obtain coated citric acid in 20 minutes;

[0045] (2) Slowly stir 45 parts of magnesium chloride, 20 parts of ammonium dihydrogen phosphate, 30 parts of water, 10 parts of glucose and 6 parts of sodium fatty acid in a closed container at 12°C for 15 minutes, then feed ammonia gas until the pH value is adjusted to 10 , then stir rapidly until flocculent magnesium ammonium phosphate hexahydrate precipitates appear, filter, dry and grind for 20 minutes to obtain magnesium ammonium phosphate hexahydrate powder;

[0046] (3) Stir 8 parts of water-absorbing resin and 20 parts of water for 8 minutes, add 60 parts of magnesi...

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Abstract

The invention belongs to the field of plant-growing ecological concrete, and in particular relates to a degradable phosphate cement-based aggregate with fertilizer effect slow-release performance and a preparation method thereof. In parts by weight, the composition includes: 2-5 parts of molasses, 6-15 parts of soluble starch, 5-85 parts of citric acid powder, 40-55 parts of magnesium chloride, 15-25 parts of ammonium dihydrogen phosphate, 5-12 parts of Parts of glucose, 2‑8 parts of sodium fatty acid, 5‑10 parts of water-absorbent resin, 5‑15 parts of Portland cement and 37‑73 parts of water. The invention uses magnesium ammonium phosphate hexahydrate as the main component, regulates the pH value of the aggregate through citric acid to change the pH value of the aqueous solution in the pores of the aggregate, and thus obtains the aggregate with good fertilizer effect slow release and degradable performance.

Description

technical field [0001] The invention belongs to the field of plant-growing ecological concrete, and in particular relates to a degradable phosphate cement-based aggregate with fertilizer effect slow-release performance and a preparation method thereof. Background technique [0002] In the Background of the Invention, the disclosed information is only intended to increase the understanding of the general background of the present invention, and is not necessarily to be regarded as an acknowledgment or in any form to imply that the information constitutes the prior art already known to those skilled in the art. [0003] In the development of water conservancy, transportation, energy, and urban expansion, the natural topography and the original vegetation cover are destroyed, resulting in soil erosion, local microclimate changes, and biological chains being cut off. Facing the seriously deteriorating ecological environment situation, plant-growing ecological concrete has been g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/34C05G3/40C05G5/40C05G3/00
CPCC04B28/344C04B2111/00758C04B24/001C04B24/38C04B24/06C04B22/12C04B24/10C04B24/085C04B24/24C04B7/02
Inventor 宫晨琛黄永波芦令超程新
Owner UNIV OF JINAN
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