A high fluidity and high density intermediate level radioactive waste liquid cement solidification material and its solidification method

A radioactive waste liquid, high fluidity technology, used in radioactive purification, nuclear engineering, etc., can solve the problems of low fluidity, many pores, and bleeding in the solidified body, and achieve improved fluidity, excellent performance, and anti-aging properties. improved effect

Active Publication Date: 2022-03-08
SICHUAN ENVIRONMENTAL PROTECTION ENG CO LTD CNNC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high-fluidity, high-density medium-level radioactive waste cement solidification material and its preparation method to solve the problems of low fluidity, more pores, and bleeding of the solidified body in the existing cement solidified slurry The problem

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  • A high fluidity and high density intermediate level radioactive waste liquid cement solidification material and its solidification method
  • A high fluidity and high density intermediate level radioactive waste liquid cement solidification material and its solidification method
  • A high fluidity and high density intermediate level radioactive waste liquid cement solidification material and its solidification method

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Embodiment 1

[0023] The high-fluidity, high-density medium-level radioactive waste cement solidification material of this embodiment includes: P.O52.5 cement, medium-level radioactive waste, CGM-A and fatty alcohol sulfonate air-entraining agent; wherein, medium The mass ratio of horizontal radioactive waste liquid, Portland cement, CGM-A and air-entraining agent is 1000:2000:10:1; the salt content of intermediate level radioactive waste liquid is 120g / L.

[0024] The solidification method of the high-fluidity and high-density medium-level radioactive waste liquid cement solidification material of this embodiment comprises the following steps:

[0025] (1) Stir and mix the above-mentioned medium-level radioactive waste liquid, CGM-A and air-entraining agent uniformly, and then add them into Portland cement and stir and mix uniformly to prepare cement mortar.

[0026] (2) Pour the cement mortar into the test mold and cure it for 28 days.

[0027] The above-mentioned cured slurry has a comp...

Embodiment 2

[0029] The high-fluidity, high-density medium-level radioactive waste liquid cement solidification material of this embodiment includes: P.O42.5 cement, medium-level radioactive waste liquid, CGM-A and fatty alcohol sulfonate air-entraining agent; wherein, medium The mass ratio of horizontal radioactive waste liquid, Portland cement, CGM-A and air-entraining agent is 1000:2200:25:3; the salt content of intermediate level radioactive waste liquid is 180g / L.

[0030] The solidification method of the high-fluidity and high-density medium-level radioactive waste liquid cement solidification material of this embodiment comprises the following steps:

[0031] (1) Stir and mix the above-mentioned medium-level radioactive waste liquid, CGM-A and air-entraining agent uniformly, and then add them into Portland cement and stir and mix uniformly to prepare cement mortar.

[0032] (2) Pour the cement mortar into the test mold and cure it for 28 days.

[0033] The above-mentioned cured slu...

Embodiment 3

[0035] The high-fluidity, high-density medium-level radioactive waste cement solidification material of this embodiment includes: P.O52.5 cement, medium-level radioactive waste, CGM-A and fatty alcohol sulfonate air-entraining agent; wherein, medium The mass ratio of horizontal radioactive waste liquid, Portland cement, CGM-A and air-entraining agent is 1000:2500:50:5; the salt content of medium level radioactive waste liquid is 240g / L.

[0036] The solidification method of the high-fluidity and high-density medium-level radioactive waste liquid cement solidification material of this embodiment comprises the following steps:

[0037] (1) Stir and mix the above-mentioned medium-level radioactive waste liquid, CGM-A and air-entraining agent uniformly, and then add them into Portland cement and stir and mix uniformly to prepare cement mortar.

[0038] (2) Pour the cement mortar into the trial mold and cure for 30 days.

[0039] The above-mentioned cured slurry has a compressive ...

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Abstract

The invention discloses a high-fluidity and high-density medium-level radioactive waste liquid cement solidification material and a preparation method thereof, belonging to the technical field of radioactive waste treatment. It includes: Portland cement, medium-level radioactive waste liquid, CGM‑A and air-entraining agent; wherein, the mass ratio of medium-level radioactive waste liquid to Portland cement is 1:(2‑2.5); Portland cement , the mass of CGM‑A and air-entraining agent is 1:(0.005‑0.02):(0.0005‑0.002). By adding CGM-A and an air-entraining agent, the invention improves the fluidity of the cement mortar, reduces the bleeding of the solidified body, and improves the leaching performance of the solidified body.

Description

technical field [0001] The invention relates to the technical field of radioactive waste treatment, in particular to a high-fluidity and high-density medium-level radioactive waste liquid cement solidification material and a preparation method thereof. Background technique [0002] During the operation of the reprocessing of nuclear fuel elements, a large amount of waste liquid and medium radioactive waste will be produced. In order to prevent this part of radioactive waste from harming the human living environment, it must be solidified to make it easy to transport and store, and then stored for a long time in The final disposal site of solidified radioactive waste is to ensure that after 300 years of safe isolation of solidified radioactive waste from the environment, the radionuclides have undergone natural decay and their radioactivity has dropped to an acceptable level, no longer endangering the environment. [0003] Cement curing is a relatively safe curing method. Its...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04G21F9/16
CPCC04B28/04G21F9/165C04B2111/00017C04B2201/50C04B2103/304C04B18/0418C04B18/0463
Inventor 徐立国赵玲君李昱汐王宇坤马延彬王凯徐宸皓
Owner SICHUAN ENVIRONMENTAL PROTECTION ENG CO LTD CNNC
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