CN108640613A - Salt marsh soil consolidator - Google Patents

Salt marsh soil consolidator Download PDF

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Publication number
CN108640613A
CN108640613A CN201810783459.1A CN201810783459A CN108640613A CN 108640613 A CN108640613 A CN 108640613A CN 201810783459 A CN201810783459 A CN 201810783459A CN 108640613 A CN108640613 A CN 108640613A
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CN
China
Prior art keywords
mass percent
cement
soil
slag
salt marsh
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810783459.1A
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Chinese (zh)
Inventor
赵庆新
才鸿伟
陈明涛
周美茹
闫国亮
潘全印
刘继中
白旭昕
杨丽萍
马千里
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Yanshan University
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Yanshan University
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Filing date
Publication date
Application filed by Yanshan University filed Critical Yanshan University
Priority to CN201810783459.1A priority Critical patent/CN108640613A/en
Publication of CN108640613A publication Critical patent/CN108640613A/en
Pending legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04—Portland cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Abstract

The invention discloses a kind of salt marsh soil consolidators, are mixed together by cement and slag, and wherein cement is common portland cement, and slag is S95 and the above slag.The present invention solves the condensation that existing Portland cement reinforcing salinized soil occurs and hardens slow, the problem that intensity is low, water stability is poor.And slag is largely used, cost is not only reduced, waste utilization is also achieved, has achieved the effect that economize on resources and environmental protection.

Description

Salt marsh soil consolidator
Technical field
The present invention relates to civil engineering materials fields, and in particular to a kind of salt marsh soil consolidator.
Background technology
Salinized soil is high with natural moisture content, natural void ratio is big, compressibility is high, shearing strength is low, the coefficient of consolidation is small, solid The features such as tying big time length, high sensitivity, perturbation, bad hydraulic permeability.Contain a large amount of seawater in salinized soil, wherein what is contained is a large amount of Corrosive salt ion can generate corrosion to cement.The many highways in strand, science of bridge building, harbour construction inevitably relate to And chlorine saline soil ground, the weak brining ground foundation process problem encountered in engineering how is solved, becomes urgently to be resolved hurrily in engineering The problem of.One of the important method that weak soil curing technology is handled as brining ground foundation can effectively solve at chlorine saline soil ground Reason problem.But the solidification effect of most currently used curing agent cement is bad, therefore seeks a kind of suitable for chlorine saline soil Curing agent is provided with important application value and practical significance.
By taking the beach salinized soil of PORT OF HUANGHUA area seashore as an example, bearing capacity is relatively low, it is difficult to be carried out as natural good ground It utilizes, it is therefore necessary to which it is reinforced.And use ordinary cement reinforce after, soil cement occur condensation hardening it is slower, intensity compared with Low phenomenon, cannot be satisfied engine request.
Invention content
It is an object of the invention to propose a kind of salt marsh soil consolidator, solves existing ordinary cement reinforcing salinized soil and occurred Condensation hardening it is slow, the problems such as intensity is low, water stability is poor, while industrial residue can be utilized, reduce cement consumption and cost, show Work is increased economic efficiency.
Technical scheme is as follows：
A kind of salt marsh soil consolidator comprising cement and slag；The cement quality percentage is 25%~75%；It is described Slag mass percent is 25%~75%, and salinized soil is natural coastal or landlocked saline soil.
Preferably, the cement is Portland cement.
Preferably, the cement includes following components：SiO2、CaO、Al2O3、MgO、Na2O、Fe2O3And SO3；Wherein SiO2Mass percent be 19~23%, CaO mass percent be 56~59%, Al2O3Mass percent be 4~ The mass percent of 7%, MgO are 2~4%, Na2The mass percent of O is 0.1~0.3%, Fe2O3Mass percent be 2 ~5%, SO3Mass percent be 1~3%.
Preferably, the cement includes following components：SiO2Mass percent be 22.55%, CaO mass percent For 57.42%, Al2O3Mass percent be 6.56%, MgO mass percent be 3.66%, Na2The mass percent of O is 0.23%, Fe2O3Mass percent be 2.975%, SO3Mass percent be 2.02%.
Preferably, the slag includes following components：SiO2、CaO、Al2O3、MgO、Na2O、Fe2O3And SO3；Wherein SiO2Mass percent be 27~29%, CaO mass percent be 33~38%, Al2O3Mass percent be 17~ The mass percent of 18%, MgO are 7~9%, Na2The mass percent of O is 0.05~1%, Fe2O3Mass percent be 0.2~0.8%, SO3Mass percent be 2~3%.
Preferably, the slag includes following components：SiO2Mass percent be 28.1%, CaO mass percent For 34.1%, Al2O3Mass percent be 17.6%, MgO mass percent be 8.26%, Na2The mass percent of O is 0.198%, Fe2O3Mass percent be 0.709%, SO3Mass percent be 2.9%.
Preferably, the salinized soil includes the particulate matter of a variety of grain sizes, the mass percent of micelle of the grain size less than 2 μm It is 10%, the mass percent of 2 μm~5 μm of clay is 20%, and the mass percent of 5 μm~50 μm of powder is 57%, 50 μ The mass percent of the sand particle of m or more grain sizes is 13%.
Beneficial effects of the present invention are as follows：
Compared with prior art, the present invention it is with remarkable advantage：Raw material are easy to get, and engineer application is more, are subjected to Degree is higher.Fast solidifying, fastening strength are high.Slag is largely used, cost is not only reduced, also achieves waste utilization, reach The effect of environmental protection is arrived.
Description of the drawings
Fig. 1 is the grain graininess for the salinized soil that salt marsh soil consolidator according to the ... of the embodiment of the present invention is applicable in.
Fig. 2 is that compacted soil 7d, 28d and 90d is made without lateral spacing resistance to compression with salt marsh soil consolidator according to the ... of the embodiment of the present invention The schematic diagram of intensity.
Fig. 3 is that compacted soil 7d, 28d and 90d consolidations object made of salt marsh soil consolidator according to the ... of the embodiment of the present invention contains The schematic diagram of amount.
Specific implementation mode
It is compared below in conjunction with preferred embodiment and existing reinforcement technique, the present invention is further explained reaches predetermined goal of the invention The technological means and effect taken.
Salt marsh soil consolidator according to the present invention comprising cement and slag.
Wherein, the cement quality percentage is 25%~75%；The slag mass percent is 25%~75%.
The cement includes following components：SiO2、CaO、Al2O3、MgO、Na2O、Fe2O3And SO3；Wherein SiO2Quality The mass percent that percentage is 19~23%, CaO is 56~59%, Al2O3Mass percent be 4~7%, MgO quality Percentage is 2~4%, Na2The mass percent of O is 0.1~0.3%, Fe2O3Mass percent be 2~5%, SO3Matter It is 1~3% to measure percentage.
Preferably, the cement includes following components：SiO2Mass percent be 22.55%, CaO mass percent For 57.42%, Al2O3Mass percent be 6.56%, MgO mass percent be 3.66%, Na2The mass percent of O is 0.23%, Fe2O3Mass percent be 2.975%, SO3Mass percent be 2.02%.
Further, the cement is Portland cement.
Further, the slag is S95 and the slag of the above model.
Further, the slag includes following components：SiO2、CaO、Al2O3、MgO、Na2O、Fe2O3And SO3；Its Middle SiO2Mass percent be 27~29%, CaO mass percent be 33~38%, Al2O3Mass percent be 17~ The mass percent of 18%, MgO are 7~9%, Na2The mass percent of O is 0.05~1%, Fe2O3Mass percent be 0.2~0.8%, SO3Mass percent be 2~3%.
Preferably, the slag includes following components：SiO2Mass percent be 28.1%, CaO mass percent For 34.1%, Al2O3Mass percent be 17.6%, MgO mass percent be 8.26%, Na2The mass percent of O is 0.198%, Fe2O3Mass percent be 0.709%, SO3Mass percent be 2.9%.
Further, the salinized soil is natural coastal or landlocked saline soil.
Further, the salinized soil includes the particulate matter of a variety of grain sizes, and micelle of the grain size less than 2 μm accounts for 10%, 2 μm ~5 μm of clay accounts for 20%, and 5 μm~50 μm of powder accounts for 57%, and the sand particle of 50 μm or more grain sizes accounts for 13%.
Embodiment 1：
Cement accounts for 25% in curing agent, and slag accounts for 75%.Curing agent is 60% salinized soil in mass ratio 1 with moisture content：4 mix It closes uniform.
Embodiment 2：
Cement accounts for 50% in curing agent, and slag accounts for 50%.Curing agent is 60% salinized soil in mass ratio 1 with moisture content：4 mix It closes uniform.
Embodiment 3：
Cement accounts for 75% in curing agent, and slag accounts for 25%.It is 1 in mass ratio that curing agent, which is 60% salinized soil with moisture content,：4 Mix is uniform.
Comparative example 1：
Cement accounts for 100% in curing agent, and slag accounts for 0%.Curing agent is 60% salinized soil in mass ratio 1 with moisture content：4 mix It closes uniform.
Comparative example 2：
Cement accounts for 0% in curing agent, and slag accounts for 100%.Curing agent is 60% salinized soil in mass ratio 1 with moisture content：4 mix It closes uniform.
Embodiment 1-3 and comparative example 1-2 compacted soil unconfined compressive strengths are measured, as a result see the table below 1：
Table 1
Experimental project 7d unconfined compressive strengths 28d unconfined compressive strengths
Embodiment 1 4.15MPa 8.89MPa
Embodiment 2 5.17MPa 9.16MPa
Embodiment 3 6.54MPa 10.59MPa
Comparative example 1 1.92MPa 3.82MPa
Comparative example 2 0MPa 5.27MPa
As can be seen that the curing agent that embodiment 1 is supported to embodiment 3,7d and 28d are without side from above example data Limit compression strength is all higher than the curing agent that comparative example 1 is supported, and fastening strength reaches 1 intensity 2 times or more of comparative example.Illustrate that this is solid Agent consolidation effect is better than ordinary cement.
Hereinafter, by taking the beach salty soil of PORT OF HUANGHUA beach area as an example, natural moisture content 38.9%, C 1 content is 0.89%.Its grading curve is detected using laser fineness gage, as shown in Figure 1；Salt marsh soil consolidator includes ordinary silicon Acid salt cement and S95 grades of slags, cement, slag main chemical compositions be shown in Table 2；Water is natural using PORT OF HUANGHUA beach area Seawater, leading ion composition and content and ratio are shown in Table 3.
The main chemical compositions of 2 cement of table, slag
The ion composition and content and ratio of 3 seawater of table
Compacted soil is native according to hardening is formed by after salt marsh soil consolidator of the invention and salinized soil mix.For difference Compacted soil in 7d, 28d and 90d unconfined compressive strength as shown in Fig. 2, its abscissa is cement substitution amount, A1 takes for cement Unconfined compressive strength when generation amount is 0%, the unconfined compressive strength that B1 is cement substitution amount when being 25%, C1 take for cement Unconfined compressive strength when generation amount is 50%, the unconfined compressive strength that D1 is cement substitution amount when being 75%, E1 is cement Unconfined compressive strength when substitution amount is 100%.It is obtained from Fig. 2, generally, early period, for example, 7d and 28d, in of the invention Salt marsh soil consolidator consolidation effect better than the case where singly mixing, and with fine slag contents in medium salting soil consolidator of the present invention It improves, compacted soil intensity gradually increases, and 28d ages are up to 10MPa；It is not yet generated when the compacted soil maintenance 7d for singly mixing slag strong Degree, but its intensity in 28d ages is more than the intensity of the compacted soil of single water mixing mud.It is remote that slag compacted soil intensity is mixed when 90d ages Far above soil-cement is singly mixed, unconfined compressive strength reaches 11MPa.
In addition, consolidating the combination that object is curing agent hydrated product and soil particle in compacted soil.Different compacted soil test specimen 7d, 28d and 90d consolidation object contents are as shown in figure 3, its abscissa is cement substitution amount, the consolidation that A1 is cement substitution amount when being 0% Object content, the consolidation object content that B1 is cement substitution amount when being 25%, the consolidation object content that C1 is cement substitution amount when being 50%, The consolidation object content that D1 is cement substitution amount when being 75%, the consolidation object content that E1 is cement substitution amount when being 100%.Consolidate object Content is consistent with compacted soil unconfined compressive strength changing rule, illustrates that compacted soil intensity is mainly derived from the consolidation in compacted soil Object.
Above, 7d is referred to 7 days, and 28d is referred to 28 days, and 90d is referred to 90 days.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses Mode, however the present invention is not limited thereto.It will be understood by those of ordinary skill in the art that：It still can be to aforementioned implementation Technical solution recorded in example is modified, or carries out equivalent replacement to which part or all technical features；And these are repaiied Change or replaces, the range for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution.

Claims (7)

1. a kind of salt marsh soil consolidator, it is characterised in that：It includes cement and slag；The cement quality percentage be 25%~ 75%；The slag mass percent is 25%~75%, and salinized soil is natural coastal or landlocked saline soil.
2. salt marsh soil consolidator as described in claim 1, it is characterised in that：The cement is Portland cement.
3. salt marsh soil consolidator as claimed in claim 2, it is characterised in that：The cement includes following components：SiO2、CaO、 Al2O3、MgO、Na2O、Fe2O3And SO3；Wherein SiO2Mass percent be 19~23%, CaO mass percent be 56 ~59%, Al2O3Mass percent be 4~7%, MgO mass percent be 2~4%, Na2The mass percent of O is 0.1 ~0.3%, Fe2O3Mass percent be 2~5%, SO3Mass percent be 1~3%.
4. salt marsh soil consolidator as claimed in claim 3, it is characterised in that：The cement includes following components：SiO2Quality The mass percent that percentage is 22.55%, CaO is 57.42%, Al2O3Mass percent be 6.56%, MgO quality hundred Divide than being 3.66%, Na2The mass percent of O is 0.23%, Fe2O3Mass percent be 2.975%, SO3Quality percentage Than being 2.02%.
5. salt marsh soil consolidator as described in claim 1, it is characterised in that：The slag includes following components：SiO2、CaO、 Al2O3、MgO、Na2O、Fe2O3And SO3；Wherein SiO2Mass percent be 27~29%, CaO mass percent be 33 ~38%, Al2O3Mass percent be 17~18%, MgO mass percent be 7~9%, Na2The mass percent of O is 0.05~1%, Fe2O3Mass percent be 0.2~0.8%, SO3Mass percent be 2~3%.
6. salt marsh soil consolidator as claimed in claim 5, it is characterised in that：The slag includes following components：SiO2Quality The mass percent that percentage is 28.1%, CaO is 34.1%, Al2O3Mass percent be 17.6%, MgO quality percentage Than for 8.26%, Na2The mass percent of O is 0.198%, Fe2O3Mass percent be 0.709%, SO3Quality percentage Than being 2.9%.
7. the salt marsh soil consolidator as described in any in claim 1 to 6, it is characterised in that：The salinized soil includes a variety of The mass percent of the particulate matter of grain size, micelle of the grain size less than 2 μm is 10%, and the mass percent of 2 μm~5 μm of clay is 20%, the mass percent of 5 μm~50 μm of powder is 57%, and the mass percent of the sand particle of 50 μm or more grain sizes is 13%.
CN201810783459.1A 2018-07-17 2018-07-17 Salt marsh soil consolidator Pending CN108640613A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110408402A (en) * 2019-07-31 2019-11-05 国网山西送变电工程有限公司 A kind of modifying agent preparing salinized soil backfill

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005187620A (en) * 2003-12-25 2005-07-14 Toa Harbor Works Co Ltd Solidifier composition
CN103553375A (en) * 2013-09-29 2014-02-05 南京工业大学 Composite soil solidifying agent, and preparation and application thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005187620A (en) * 2003-12-25 2005-07-14 Toa Harbor Works Co Ltd Solidifier composition
CN103553375A (en) * 2013-09-29 2014-02-05 南京工业大学 Composite soil solidifying agent, and preparation and application thereof

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
林宗寿主编: "《水泥工艺学》", 31 December 2012, 武汉理工大学出版社 *
沈威主编: "《水泥工艺学（重排本）》", 31 December 2011, 武汉理工大学出版社 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110408402A (en) * 2019-07-31 2019-11-05 国网山西送变电工程有限公司 A kind of modifying agent preparing salinized soil backfill

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Application publication date: 20181012

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