Cement fixing mortar for low and medium level radioactive debris and preparation method thereof
A radioactive and horizontal technology, applied in the field of mortar and its preparation, can solve problems such as the difficulty in meeting the performance of cement mortar, and achieve the effect of strong engineering operability, good inclusiveness and strong economy.
Active Publication Date: 2019-04-23
NUCLEAR POWER INSTITUTE OF CHINA
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] The purpose of the present invention is to solve the problem that the performance of cement mortar in the prior art is extremely difficult to meet the current standard EJ1186-2005, to develop a fixed formula with independent intellectual property rights, economical and cheap, and to further improve the use of radioactive waste in my country. Cement-fixed mortar for low-medium level radioactive debris and preparation method thereof
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0032] The preparation method of the cement fixing mortar used for low and medium level radioactive sundries comprises the following steps:
[0033] (1) dispersing the additive in water to make a wet material; mixing fly ash, silica fume, cement and sand evenly to make a dry material, the additive is selected from water reducers, defoamers and sodium silicate;
[0034] (2) After mixing the wet material and dry material evenly, transfer to the cement mortar mixer to stir the mortar. The mixing time is 10 to 20 minutes. After the mortar is prepared, it is divided into poly In the vinyl mold, after the vibration and exhaust are completed on the vibrating table, put it into the curing box for curing. The curing temperature is 25±5°C and the relative humidity is ≥90%. After 28 days of curing, take it out and demould to make a cement mortar sample.
[0035] The testing methods for fluidity, compressive strength and impermeability testing of cement mortar samples are as follows:
[...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| compressive strength | aaaaa | aaaaa |
| impermeability | aaaaa | aaaaa |
| compressive strength | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a cement fixing mortar for low and medium level radioactive debris and a preparation method thereof, which solves the problem that the performance of the cement mortar in the prior art is extremely difficult to meet the current standard EJ1186-2005. The cement fixing mortar of the present invention comprises water, ash material, sand, additive, and described ash material comprises the fly ash that is 6%~12% by mass percentage, the silica fume of 3%~10% and the cement of remaining amount; The mass ratio of water to ash is 0.25-0.3, the mass ratio of sand to ash is 0.2-0.4, and the additive is 0.4%-1.25% of the mass of ash. The average compressive strength of the cement mortar made by the invention is greater than 70MPa, the fluidity is greater than 400mm, and the impermeability is far lower than 2500C, which meets the requirements of the current standard EJ1186-2005, and the test raw materials are cheap, easy to obtain, and economical. Great for promoting apps.
Description
technical field [0001] The invention relates to a mortar and a preparation method thereof, in particular to a preparation method of mortar used for cement fixation of low and medium level radioactive miscellaneous wastes. Background technique [0002] Among the wastes generated during the operation, maintenance and decommissioning of nuclear facilities, except for conventional wastes such as distillation residues and waste resins, the remaining wastes are collectively referred to as miscellaneous wastes, mainly including: waste labor insurance, waste filter elements, waste metal pipe fittings, waste maintenance tools and Contaminated gravel, etc., the cost of decontamination of such waste is high and has no practical significance. In practice, it is often collected according to its compressibility and radiation pollution level and stored temporarily, waiting for subsequent treatment. The annual production volume is relatively large, and long-term accumulation not only seriou...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00
CPCC04B28/00C04B2201/50C04B18/08C04B18/146C04B14/06C04B14/045C04B2103/302C04B2103/50
Inventor 张劲松陈云明严文超刘东彬李兵曾彬任力勤周蓉钟庆社李新政
Owner NUCLEAR POWER INSTITUTE OF CHINA