CN115745549A - Sludge curing agent - Google Patents
Sludge curing agent Download PDFInfo
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- CN115745549A CN115745549A CN202211343617.4A CN202211343617A CN115745549A CN 115745549 A CN115745549 A CN 115745549A CN 202211343617 A CN202211343617 A CN 202211343617A CN 115745549 A CN115745549 A CN 115745549A
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Abstract
The invention discloses a silt curing agent, which is applied to the foundation construction of high-water-content areas and comprises a main curing agent and an exciting agent; wherein the main curing agent comprises, by mass, 4-10 parts of mineral powder and 1.6-2.8 parts of cement; the excitant comprises 0.1 to 1 portion of sodium sulfate, 0.05 to 0.24 portion of sodium hydroxide, 0 to 18 portions of water absorption resin, 0 to 20 portions of foaming agent, 0 to 2.5 portions of magnesium sulfate, 0 to 3.5 portions of high-strength fiber, 1.4 to 2 portions of lime and 0.3 to 2.1 portions of dihydrate gypsum; the components can be selected according to the water content of the soil, and the specific mass fraction is selected, wherein the index of the water content of the soil is 15-80%. The curing agent can be applied to soil environments with different water contents, can be used for curing operation, saves construction time, reduces the working time of professional technicians on site, and has the advantages of low dosage and low cost, and the mixing amount of the curing agent is only about five percent of the mass of in-situ soil.
Description
Technical Field
The invention relates to a sludge curing agent.
Background
The traditional roadbed construction process is to dig out original sludge or soft foundation soil of a roadbed, fill the original sludge or soft foundation soil with lime (the ingredients are lime and high-quality soil) which is formed by stirring according to a certain proportion, stir the lime soil and water (the proportion of the added water takes the optimal water content measured by experiments as the doping amount standard), and lay the roadbed by compacting the lime soil layer.
The materials required by the process are lime and soil, the lime is a solidified material, the soil needs to be changed and filled, and the in-situ soil cannot be directly used, so that in-situ soil resources are wasted, and the construction cost is increased and the construction period is influenced due to the transportation and the purchase of new soil. In addition, the water quantity required by the lime-soil solidification reaction is required, the construction effect is obviously influenced by too much or too little water, and the water quantity needs to be strictly controlled when the strength of the paved roadbed reaches the national standard, so that the construction process requirement is higher, and the construction cost is invisibly increased.
Meanwhile, in order to increase the utilization rate of the original soil, the existing research adopts a mixing and curing mode to directly treat and cure the original soil so as to obtain a foundation condition with curing strength meeting the use standard, but the mode has unsatisfactory use effect in areas with more sludge, and has certain problems in curing strength and curing efficiency.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provide a sludge curing agent.
A silt curing agent is applied to the foundation construction of a high-water-content area and comprises a main curing agent and an exciting agent;
the main curing agent comprises, by mass, 4-10 parts of mineral powder and 1.6-2.8 parts of cement;
according to the mass parts, the excitant comprises 0.1 to 1 part of sodium sulfate, 0.05 to 0.24 part of sodium oxide, 0 to 18 parts of water-absorbing resin, 0 to 20 parts of foaming agent, 0 to 2.5 parts of magnesium sulfate, 0 to 3.5 parts of high-strength fiber, 1.4 to 2 parts of lime and 0.3 to 2.1 parts of dihydrate gypsum;
the components are selected according to the specific mass fraction of the soil moisture content, wherein the index of the soil moisture content is 15-80%.
The invention has the following functions:
mineral powder: the cement curing agent is used for replacing the effect of cement curing soft soil, and simultaneously saves the cement consumption and reduces the cost.
Cement: the function is to solidify the soft soil and take a gelling effect.
Sodium sulfate: the activity of the mineral powder cement is excited, the hydration reaction is accelerated, and the construction period is shortened.
Sodium hydroxide: the effect is to react with the water in the soil, neutralize the water and reduce the water content.
Water-absorbent resin: the water-absorbing resin has strong water-absorbing capacity, can absorb water with the mass 30-200 times of the self mass, and can quickly absorb water in a short time.
Foaming agent: the invention selects the plant protein foaming agent as the foaming agent type, and the foaming agent type is used for reducing the weight of the roadbed under the condition of not losing the strength.
Magnesium sulfate: it is used as flocculant to purify soil water and absorb water.
High-strength fiber: the high-strength fiber has the function of enhancing the early strength of the solidified soil, and the high-strength fiber can be selected from one or more of the following fibers:
poly (p-phenylene terephthalamide) fiber (Kevlar), aramid copolymer fiber (HM-50), heterocyclic polyamide fiber (bha), brown note, carbon fiber (Carbon fiber: torayca), graphite fiber (M40), silicon carbide fiber, etc.
Lime: and the water absorbent plays a role in reducing the water content.
Dihydrate gypsum: the curing agent has the function of retarding the curing material, prolongs the reaction time of the curing agent and allows sufficient time for construction.
The following table shows the blending amount of each curing agent component:
wherein the content of the water-absorbing resin is N, and the water content of the soil is N; wherein when N is less than 35%, the specific content of the N water-absorbent resin is 0, and the water absorption is provided by the main curing agent; when the N is more than 35 percent, the mass portion of the N water-absorbing resin is gradually increased from 0 portion to 18 portions and is used for absorbing the water in the original soil.
The curing agent comprises the following specific using steps:
before construction, main curing agent and exciting agent in the curing agent are mixed and uniformly distributed on the surface of soil to be cured in a scattering mode, and then the soil and the curing agent are stirred by on-site mechanical equipment.
And during stirring, supplementing by using a certain amount of water, wherein the mass part of the supplemented water is related to the water content of the soil, and the mass of the supplemented water is (12-15%) (total mass of the curing agent + total mass of the soil after dehydration).
The raw materials of the curing agent are cement, quicklime, mineral powder, dihydrate gypsum and the like, the raw materials are easily available in markets, and can be obtained according to early experimental data, and the curing agent with the total mass of about 8% is added, so that a good curing effect can be achieved. The raw material cost is not high.
The production of the curing agent only needs to accurately add the raw materials according to the proportion and the mixing amount of the raw materials obtained by experiments, then the production process can be completed by stirring the dry powder, and the soil curing agent is not combusted or exploded and can be stored for more than one year at room temperature.
Has the advantages that:
the invention limits the use amount of each component and adopts inorganic materials such as water-absorbent resin, foaming agent and the like for application, so that the application range of the curing agent can be greatly improved, the curing agent can be applied to soil in various environments, and the applicability of the curing agent is expanded.
And secondly, by means of field construction and spraying, the construction period of soil solidification can be greatly shortened, the time for replacing and filling is saved, the hydration reaction of the curing agent is fast, and the bearing strength is achieved in the same day of construction. Meanwhile, the use of manpower is reduced, the construction control is convenient, the construction only needs to be simply and uniformly stirred and fully compacted, and the requirement on large machinery is low.
Drawings
FIG. 1 is a schematic representation of a curing agent prepared in accordance with example one after surface curing;
FIG. 2 is a schematic representation of the curing agent prepared in example one after side curing.
Detailed Description
For the purpose of enhancing the understanding of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
The first embodiment is as follows:
wherein the water content of the soil is 15 percent, and the mixture ratio of each component is as follows:
4 parts of mineral powder, 1.60 parts of cement, 0.10 part of sodium sulfate, 0.05 part of sodium hydroxide, 0 part of water-absorbent resin, 0 part of foaming agent, 0 part of magnesium sulfate, 0 part of high-strength fiber, 1.40 parts of lime and 0.30 part of dihydrate gypsum.
The total amount of the soil to be constructed is calculated, the soil is uniformly sprayed according to the proportion of the curing agent, water is added (the water addition amount is about 13 percent of the total amount of the soil reinforcing agent through an early experiment), the soil and the curing agent are stirred and compacted by water-containing on-site mechanical equipment, and the soil and the curing agent are simply stirred uniformly and fully compacted.
Example two:
wherein the water content of the soil is 25 percent, and the mixture ratio of each component is as follows:
6 parts of mineral powder, 2 parts of cement, 0.10 part of sodium sulfate, 0.08 part of sodium hydroxide, 0 part of water-absorbent resin, 0 part of foaming agent, 0 part of magnesium sulfate, 0 part of high-strength fiber, 1.60 parts of lime and 0.60 part of dihydrate gypsum. The rest is as in the first embodiment.
Example three:
wherein the water content of the soil is 35 percent, and the mixture ratio of each component is as follows:
8 parts of mineral powder, 2.40 parts of cement, 0.20 part of sodium sulfate, 0.11 part of sodium hydroxide, 10 parts of water-absorbent resin, 12 parts of foaming agent, 0.50 part of magnesium sulfate, 1.50 parts of high-strength fiber, 1.80 parts of lime and 0.90 part of dihydrate gypsum. The rest is as in the first embodiment.
Example four:
wherein the water content of the soil is 45 percent, and the mixture ratio of each component is as follows:
10 parts of mineral powder, 2.80 parts of cement, 0.40 part of sodium sulfate, 0.14 part of sodium hydroxide, 12 parts of water-absorbent resin, 14 parts of foaming agent, 1 part of magnesium sulfate, 2 parts of high-strength fiber, 2 parts of lime and 1.20 parts of dihydrate gypsum. The rest is as in the first embodiment.
Example five:
wherein the water content of the soil is 55%, and the mixture ratio of each component is as follows:
10 parts of mineral powder, 2.80 parts of cement, 0.60 part of sodium sulfate, 0.17 part of sodium hydroxide, 14 parts of water-absorbent resin, 16 parts of foaming agent, 1.50 parts of magnesium sulfate, 2.50 parts of high-strength fiber, 2 parts of lime and 1.50 parts of dihydrate gypsum. The rest is as in the first embodiment.
Example six:
wherein the water content of the soil is 65 percent, and the mixture ratio of each component is as follows:
10 parts of mineral powder, 2.80 parts of cement, 0.80 part of sodium sulfate, 0.21 part of sodium hydroxide, 16 parts of water-absorbent resin, 18 parts of foaming agent, 2 parts of magnesium sulfate, 3 parts of high-strength fiber, 2 parts of lime and 1.80 parts of dihydrate gypsum. The rest is as in the first embodiment.
Example seven:
wherein the water content of the soil is 75%, and the mixture ratio of each component is as follows:
10 parts of mineral powder, 2.80 parts of cement, 1 part of sodium sulfate, 0.24 part of sodium hydroxide, 18 parts of water-absorbent resin, 20 parts of foaming agent, 2.50 parts of magnesium sulfate, 3.50 parts of high-strength fiber, 2 parts of lime and 2.10 parts of dihydrate gypsum. The rest is as in the first embodiment.
The following table is a test report of the unconfined 7d intensities of examples one through seven.
| Water content ratio | 7D unconfined Strength |
| 15％ | 2.3Mpa |
| 25％ | 1.8Mpa |
| 35％ | 1.6Mpa |
| 45％ | 1.5Mpa |
| 55％ | 1.3Mpa |
| 65％ | 1.1Mpa |
| 75％ | 1Mpa |
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A silt curing agent is applied to the foundation construction of a high-water-content area and is characterized by comprising a main curing agent and an exciting agent;
the main curing agent comprises, by mass, 4-10 parts of mineral powder and 1.6-2.8 parts of cement;
according to the mass parts, the excitant comprises 0.1 to 1 part of sodium sulfate, 0.05 to 0.24 part of sodium hydroxide, 0 to 18 parts of water-absorbing resin, 0 to 20 parts of foaming agent, 0 to 2.5 parts of magnesium sulfate, 0 to 3.5 parts of high-strength fiber, 1.4 to 2 parts of lime and 0.3 to 2.1 parts of dihydrate gypsum;
the components are selected according to the specific mass fraction of the soil moisture content, wherein the index of the soil moisture content is 15-80%.
2. The sludge curing agent as claimed in claim 1, wherein the content n of the water-absorbent resin is Water-absorbing resin The water content of the soil is N; wherein when N is less than 35%, N Water-absorbing resin The specific content of (A) is 0; when N is greater than 35%, N Water-absorbing resin The mass fraction of (A) is gradually increased from 0 part to 18 parts.
3. The sludge curing agent as claimed in claim 1, wherein the curing agent is prepared by the following steps:
before construction, main curing agent and exciting agent in the curing agent are mixed and uniformly distributed on the surface of soil to be cured in a scattering mode, and then the soil and the curing agent are stirred by on-site mechanical equipment.
4. A sludge curing agent according to claim 3 wherein during agitation, a quantity of water is added to supplement the mixture, the quantity of water supplemented being (12-15%) by mass (total mass of curing agent + total mass of soil after dewatering).
5. The sludge curing agent as claimed in claim 1 or 4, wherein the curing agent is added in an amount of 6 to 10% by mass based on the total mass of the soil.
6. The sludge curing agent as claimed in claim 1, wherein the stirred soil containing the curing agent is subjected to paving, compacting and aging treatment in sequence.
7. The sludge curing agent as claimed in claim 1, wherein in the production of the curing agent, the main curing agent and the activator are mixed by a dry powder stirring method, and the mixture is sealed and stored.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211343617.4A CN115745549A (en) | 2022-10-31 | 2022-10-31 | Sludge curing agent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211343617.4A CN115745549A (en) | 2022-10-31 | 2022-10-31 | Sludge curing agent |
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| CN115745549A true CN115745549A (en) | 2023-03-07 |
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| CN202211343617.4A Pending CN115745549A (en) | 2022-10-31 | 2022-10-31 | Sludge curing agent |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117986001A (en) * | 2024-04-07 | 2024-05-07 | 大连长锦科技有限公司 | Curing agent based on multiple solid wastes and preparation method and application thereof |
| CN117986001B (en) * | 2024-04-07 | 2024-05-31 | 大连长锦科技有限公司 | Curing agent based on multiple solid wastes and preparation method and application thereof |
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| CN102344813A (en) * | 2011-07-18 | 2012-02-08 | 徐辰楚 | Curing agent for curing marine poor subsoil |
| JP2013123691A (en) * | 2011-12-15 | 2013-06-24 | Daikyogumi:Kk | Hydrothermally solidified foam made mainly of incineration ash, and method for producing the same |
| CN108218317A (en) * | 2018-01-19 | 2018-06-29 | 湖北工业大学 | A kind of high-moisture percentage sullage solidifying method |
| CN113735526A (en) * | 2021-09-27 | 2021-12-03 | 北京安科兴业科技股份有限公司 | Soft soil hardening agent for sea area environment |
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2022
- 2022-10-31 CN CN202211343617.4A patent/CN115745549A/en active Pending
Patent Citations (6)
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| JP2002128550A (en) * | 2000-10-16 | 2002-05-09 | Natoo Kenkyusho:Kk | Alkali-based curing agent and water resistant and heat resistant solidified body and its use |
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| CN102344813A (en) * | 2011-07-18 | 2012-02-08 | 徐辰楚 | Curing agent for curing marine poor subsoil |
| JP2013123691A (en) * | 2011-12-15 | 2013-06-24 | Daikyogumi:Kk | Hydrothermally solidified foam made mainly of incineration ash, and method for producing the same |
| CN108218317A (en) * | 2018-01-19 | 2018-06-29 | 湖北工业大学 | A kind of high-moisture percentage sullage solidifying method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117986001A (en) * | 2024-04-07 | 2024-05-07 | 大连长锦科技有限公司 | Curing agent based on multiple solid wastes and preparation method and application thereof |
| CN117986001B (en) * | 2024-04-07 | 2024-05-31 | 大连长锦科技有限公司 | Curing agent based on multiple solid wastes and preparation method and application thereof |
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