Curing agent capable of rapidly curing sludge at room temperature and use method thereof

A rapid curing and curing agent technology, which is applied in the field of a new type of curing agent for fast curing sludge at room temperature, can solve the problems of large amount of dredged sludge design strength, high engineering cost, poor water resistance, etc., to shorten the consolidation time, The effect of high consolidation strength and fast curing speed

Inactive Publication Date: 2015-12-30
GUANGZHOU INSTITUTE OF BUILDING SCIENCE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the analysis of the existing reports, when the water content is greater than 1.0 times the liquid limit or higher, it is difficult to use the above materials or additives to make the dredged silt reach the design strength (such as dams and embankments generally require greater than 1.0MPa) or need to add the amount Very large, so that the project cost is very high, which limits its application in engineering
The most commonly used cement and lime are used as sludge curing agents, but they have large dry shrinkage, poor water resistance, long setting period, and relatively weak curing strength. They are only suitable for certain specific sludge, and the longer setting period also makes the sludge Curing treatment requires a large amount of space, so it is of great significance to develop a curing material with fast curing, high curing strength, dry shrinkage, good water resistance and strong adaptability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The conventional size of the mortar test is adopted, and the sample size is 70.7mm×70.7mm×70.7mm.

[0028] The raw materials for curing agent preparation are: 58% of inorganic powder (23% of slag powder, 6% of silica fume powder, 22% of burnt clay, 7% of bentonite); 41% of emulsion (39% of sodium silicate solution of 45 degrees Baume, hydrogen Sodium oxide saturated solution 2%); high-performance water-absorbing resin 1.1% (sodium polyacrylate 0.6%, polyacrylamide 0.3%); triethanolamine 0.1%.

[0029] The quality of the sludge solidifying agent accounts for 11% of the sludge mass.

[0030] The curing agent usage method of the present embodiment is as follows:

[0031] The mud to be solidified is a river silt in Guangzhou City, with a moisture content of 155% and a density of 1430kg / m 3 . According to this formula, add the corresponding amount of high-performance water-absorbing resin, stir evenly, after fully absorbing water for 5 minutes to 10 minutes, add pre-mixed...

Embodiment 2

[0034] The conventional size of the mortar test is adopted, and the sample size is 70.7mm×70.7mm×70.7mm.

[0035] The raw materials for curing agent preparation are: 62% of inorganic micropowder (21% of slag powder, 18% of fly ash, 15% of burnt clay, and 8% of pozzolan); 37% of emulsion (28% of potassium silicate solution of 44 degrees Baume, sodium saturated solution 9%); high-performance water-absorbent resin 1.22% (sodium polyacrylate 0.62%, polyacryl acetamide 0.6%); triethanolamine 0.08%.

[0036] The quality of the sludge solidifying agent accounts for 12% of the sludge mass.

[0037] The curing agent usage method of the present embodiment is as follows:

[0038] The mud to be solidified is a river silt in Guangzhou City, with a moisture content of 143% and a density of 1470kg / m 3. According to this formula, add the corresponding amount of high-performance water-absorbing resin, stir evenly, after fully absorbing water for 5 minutes to 10 minutes, add pre-mixed inorga...

Embodiment 3

[0041] The conventional size of the mortar test is adopted, and the sample size is 70.7mm×70.7mm×70.7mm.

[0042] The raw materials for curing agent preparation are: 64% of inorganic powder (18% of fly ash, 15% of silica fume powder, 24% of burnt clay, 8% of bentonite); 34% of emulsion (27% of sodium silicate solution of 45 degrees Baume, Potassium silicate solution of 44 degrees Baume 5%, sodium dipolyphosphate saturated solution 2%); high-performance water-absorbing resin 1.6% (sodium polyacrylate 1.2%, polyacrylamide 0.3%, polyacrylamide 0.1%); Triethanolamine 0.4%. Triethanolamine 0.4%.

[0043] The quality of the sludge solidifying agent accounts for 15% of the sludge mass.

[0044] The curing agent usage method of the present embodiment is as follows:

[0045] The mud to be solidified is a river silt in Guangzhou City, with a moisture content of 171% and a density of 1350kg / m 3 . According to this formula, add the corresponding amount of high-performance water-absor...

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Abstract

The invention discloses a curing agent capable of rapidly curing sludge at room temperature and a use method thereof. The curing agent is prepared from, by weight, 48%-70% of inorganic micro powder, 28%-50% of emulsion, 0.05%-1.8% of high-performance water-absorbent resin and 0.05%-0.5% of triethanolamine. The emulsion can react with the inorganic micro powder and activated silicon dioxide and aluminum oxide in the sludge to form a zeolite-like crystalline substance of a silicon (aluminum)-oxygen tetrahedron structure. The sludge curing agent is capable of improving the curing strength of the sludge and shortening the curing time, small in air shrinkage and good in water resistance, and dosing of materials can be particularly adjusted according to components of the sludge, so that curing of the sludge is not limited by time, the strength, the stability and the like meet the actual engineering requirements, the cost is low, pollution does not exist, and the curing agent can be widely applied and promoted.

Description

technical field [0001] The invention relates to a solidifying material used for solidifying sludge produced in water conservancy projects and civil engineering, in particular to a novel curing agent for fast solidifying sludge at normal temperature and a method for using the same. Background technique [0002] There are many oceans, rivers and lakes in our country, and a lot of silt is produced. Silt has a high water content, fine particles, more than 20% clay particles, extremely low disturbance intensity, and is not easy to use. Moreover, the sludge contains a lot of heavy metals and organic pollutants, which is easy to rot and smell, pollutes soil and water, and is harmful to the environment. Cause serious secondary pollution. Disposal of silt produced in oceans or offshore ports is generally done by reclamation or ocean dumping. Due to the poor nature of silt, dredging filling requires a lot of foundation treatment costs after dredging, and has the disadvantages of lon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/26
Inventor 徐海军雷翅
Owner GUANGZHOU INSTITUTE OF BUILDING SCIENCE CO LTD
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