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A kind of cement additive for solidifying organic waste and its application

A technology for cement additives and organic wastes, applied in the field of cement additives and cement additives for solidifying organic wastes, can solve the problems that the solidification process of wastes cannot be carried out, the organic matter escapes to the upper layer of the cement slurry, the strength of the solidified body is not good, etc., and achieves enhanced solidification. physical properties, enhance the degree of hydration reaction, and reduce the effect of leaching rate

Active Publication Date: 2017-10-13
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to: when solidifying cement for waste containing organic matter, due to the existence of organic matter, the solidified body cannot be molded or has poor performance such as strength, especially when dealing with certain harmful organic waste liquids. Even the organic matters directly jump to the upper layer of the cement slurry, resulting in the problem that the process of solidifying the waste cannot be carried out. A cement additive for solidifying organic waste and its application are provided
The invention can effectively solve the problems that the solidification cannot be formed and the strength of the solidified body is poor when the cement is solidified to treat waste containing organic matter.

Method used

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  • A kind of cement additive for solidifying organic waste and its application
  • A kind of cement additive for solidifying organic waste and its application
  • A kind of cement additive for solidifying organic waste and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Weigh each component according to the following mass percentage: 10% coagulant calcium formate, 10% oil-absorbing particles, 15% microsilica, 15% activated carbon, 18% wood fiber, 15% fly ash, 17% crack-resistant fibers. The weighed components are pulverized and mixed evenly to obtain the cement additive. In this embodiment, the oil-absorbing material is a superhydrophobic and superoleophilic oil-absorbing granular material, which is a commercially available product.

[0047]The above cement additives are added to conventional Portland cement, and 2.5 parts (weight) of cement additives are added to 100 parts (weight) of cement. The mixture of the above cement additives and Portland cement is used to solidify the radioactive oil-water mixture (in the radioactive oil-water mixture, the content of various oils and other organic substances is about 20-30%, and the rest is water).

[0048] After curing, the 28d compressive strength of the cement solidified body is 12.2MPa,...

Embodiment 2

[0054] Weigh each component according to the following mass percentage: 15% coagulant calcium formate, 15% oil-absorbing particles, 10% microsilica, 10% activated carbon, 15% wood fiber, 20% fly ash, 15% crack-resistant fibers. The weighed components are pulverized and mixed evenly to obtain the cement additive. In this embodiment, the oil-absorbing material is a super-hydrophobic and super-oleophilic mesh material, which is a commercially available product.

[0055] The above cement additives were added to conventional Portland cement, and 8.5 parts of cement additives were added to 100 parts (by weight) of Portland cement to obtain the first reactant. Using the first reactant of this embodiment, the radioactive oil-water emulsion (in the radioactive oil-water emulsion, the oil-water ratio is emulsified to form an emulsion) is subjected to cement curing treatment.

[0056] The prepared cement solidified body as image 3 shown. After curing, the surface of the cement solid...

Embodiment 3

[0058] Weigh each component according to the following mass percentage: 15% coagulant calcium formate, 5% oil-absorbing particles, 17% microsilica, 18% activated carbon, 15% wood fiber, 14% fly ash, 16% crack-resistant fibers. The weighed components are pulverized and mixed evenly to obtain the cement additive.

[0059] The above cement additives are added to conventional Portland cement, and 2 parts of cement additives are added to 100 parts (by weight) of Portland cement. The cement solidification treatment is carried out on the flocculation sediment of the electroplating waste liquid by using the mixture of the above cement additive and Portland cement.

[0060] The prepared cement solidified body as Figure 4 shown. After measurement, the strength of the cement solidified body obtained after curing in this embodiment is 10.2MPa, and the 42d ion leaching rate is less than 1×10 -5 cm / d. At the same time, the surface of the solidified body prepared in this embodiment is...

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Abstract

The invention discloses a cement additive for curing organic waste and application of the cement additive and aims to solve the problems that when cement curing treatment is conducted on waste containing organic matter, particularly when cement curing treatment is conducted on organic waste liquid with great harm, due to existence of organic matter, a curing body cannot be formed, or the strength or other performance is poor, organic matter even directly jumps to the upper layer of cement paste, and the curing waste treatment process cannot be conducted. The cement additive comprises coagulant, an oil absorption material, microsilica, activated carbon, wood fibers, coal ash and anti-crack fibers. By means of the cement additive, the problems that when the waste containing organic matter is subjected to curing treatment through cement, curing is not formed, and the strength and other performance of the curing body are poor are solved. The cement additive is low in cost, free of toxin and foul smell, less in consumption, safe and reliable, an existing waste curing treatment process and equipment are not needed to be changed, the compressive strength of the obtained cement curing body is larger than 7 MPa and can reach 13 MPa at the maximum, and the cement additive has good application prospect.

Description

technical field [0001] The invention relates to the field of waste treatment, in particular to a cement additive, in particular to a cement additive for solidifying organic waste and its application. Background technique [0002] There is a certain amount of organic matter in the dredged sediment of lakes and rivers, and a certain amount of oil-contaminated soil will also be produced during the process of oil extraction and use. It is an effective resource recycling method to treat such organic matter-containing sludge with cement solidification. Especially for some hazardous organic waste liquids (such as radioactive oil-water emulsions, electroplating waste liquid flocculation sediments, refractory petrochemical wastewater flocculation sediments, etc.), the cement curing process is often selected for solidification and stabilization treatment. [0003] The hydration reaction of cement is actually a compound chemical reaction between the mineral components in the cement cl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/04C04B24/12C04B14/02C04B16/02C04B18/08C04B14/06C04B28/04C04B28/00C04B28/06
CPCC04B28/00C04B28/04C04B28/06C04B40/0039C04B2103/12C04B2111/00767C04B14/062C04B14/022C04B16/02C04B18/08C04B20/0048C04B2103/0068C04B24/04C04B24/122Y02W30/91
Inventor 刘艳万小岗王东文王永鹏李成邦赵颜红张灏庞敏
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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