CN106007636A - Salt-corrosion-resistant vesicle-mixed eolian sandy soil and preparing method thereof - Google Patents
Salt-corrosion-resistant vesicle-mixed eolian sandy soil and preparing method thereof Download PDFInfo
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- CN106007636A CN106007636A CN201610300512.9A CN201610300512A CN106007636A CN 106007636 A CN106007636 A CN 106007636A CN 201610300512 A CN201610300512 A CN 201610300512A CN 106007636 A CN106007636 A CN 106007636A
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- sandy soil
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- 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
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
-
- 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
- C04B2111/40—Porous or lightweight materials
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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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)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a salt-corrosion-resistant vesicle-mixed eolian sandy soil and a preparing method thereof. The vesicle-mixed eolian sandy soil comprises cement, slags, active magnesium oxide, water glass, sodium hydroxide, eolian sand, mineral admixtures, water and vesicles. Due to the interaction between the components of the vesicle-mixed eolian sandy soil and the waterproof and salt-resisting effects of the vesicles, it is guaranteed that the vesicle-mixed eolian sandy soil is set, hardened, generated and developed in the salty environment, and strength is kept for a long time. The vesicle-mixed eolian sandy soil is used in the desert salty-soil environment and can meet the requirements of structures and members for strength and durability.
Description
Technical field
The present invention relates to a kind of building, road and the ground of bridge, bubble of roadbed treatment under the salting environment of desert
Mixing aeolian accumulation sandy soil and preparation method thereof, belong to civil engineering groundwork process field.
Background technology
China is one of widest country of desert distribution, and desert area accounts for area about 8.4%, and is distributed mainly on
The provinces and regions such as the Xinjiang in China western part, Inner Mongol, Qinghai, Gansu, Ningxia, Shaanxi.Due to the geographical environment that western desert area is special,
Creating the uniqueness of this area's weather, summer high temperature, winter is cold, and annual range of temperature and temperature difference per day are the biggest, dry short of rain,
Precipitation is few, and evaporation capacity is big.These climatic characteristics determine the advantage of ascending current in desert soil so that it is solubility salt with
Capillary water rising and accumulate in top layer, and natural leaching is the faintest with desalination processes, causes the universal salification of soil, is formed big
Area salinized soil, the desert soil of the overwhelming majority belongs to salinized soil.Desert salinized soil salinity compared with high, saliferous kind is many, this
The ground of structures, the subgrade engineerings such as the buildings in a little areas, road, bridge, tunnel, it is necessary to consider salting environment is corrosion-resistant
Performance.Salinity contained by the salinized soil of desert is mainly the (K in potassium+), sodium (Na+), magnesium (Mg2+), calcium (Ca2+) villaumite (Cl-), sulphuric acid
Salt (SO4 2-), carbonate (CO3 2-) and bicarbonate (HCO3 -), they are to currently used based on silicate series cement mixed
Solidifying soil and reinforcing bar produce heavy corrosion effect, thus constitute a serious threat the durability of concrete and reinforced concrete component.
Concrete and reinforced concrete is the ingredient that ground, roadbed treatment are indispensable, but its application under the salting environment of desert
It is extremely restricted.Meanwhile, concrete aggregate need to use non-salting material, these transport of materials distances in salty area, desert
Far, acquisition cost big, and the drift-sand resource existed in a large number cannot effectively utilize, therefore compel to be essential seek one can be abundant
Utilize drift-sand resource can have again the ground of the strongest decay resistance, Roadbed Treatment in salting environment, to meet
The requirement of salting environment engineer applied.
Summary of the invention
The present invention solves ground, the endurance issues of roadbed under the salting environment of desert, it is proposed that one utilizes drift-sand
Resource is as raw material, the corrosion resistant bubble mixing aeolian accumulation sandy soil that can be used for salting environment and preparation method thereof.The present invention's is resistance to
The bubble mixing aeolian accumulation sandy soil of salt corrosion, comprise cement, slag, activated magnesia, waterglass, sodium hydroxide, drift-sand, mineral
Admixture and water, and the bubble containing weight accounting 1%-5%.
Cement, slag, activated magnesia, waterglass and sodium hydroxide are as Binder Materials, containing Na+、K+、Ca2+、Mg2+、
Cl-、SO4 2-、CO3 2-Etc. hydration and hardening under the salting environment of several or multiple salt ion, and in Binder Materials and salting environment
The reaction of part salinity generate substantial amounts of hydras CASH, Friedel ' s salt, Kuzel ' s salt and Layered
Double Hydroxide, these hydras are as the significant contributor of cementing strength, and it is good water stability in salting environment
And salt erodibility endurance, it is ensured that the stable and salt tolerant erosion ability of mixing aeolian accumulation sandy soil intensity；Also mix in mixing aeolian accumulation sandy soil simultaneously
Enter bubble population, formed bubble mixing aeolian accumulation sandy soil, a large amount of closings, bubble fine and closely woven, finely dispersed, composite soil can be effectively improved
Anti-permeability performance, alleviate penetrating into the salt of composite soil is lost and destroying of saliferous capillary water, improve its property resistant to salt corrosion further.This
The salting environment that bright described bubble mixing aeolian accumulation sandy soil are suitable for is containing Na+、K+、Ca2+、Mg2+、Cl-、SO4 2-、CO3 2-、HCO3 -Deng
Salt ion, saliferous gross mass percentage composition is 0.5%-10%, the salinized soil of aqueous mass percent 5%-100%.
Described bubble mixing aeolian accumulation sandy soil resistant to salt corrosion, its each components by weight is: cement: 3%-25%；Slag:
8%-25%；Activated magnesia: 1%-5%；Waterglass: 1%-10%；Sodium hydroxide: 0.5%-3%；Drift-sand: 5%-
70%；Mineral admixture: 0%-5%；Water: 15%-30%；Bubble: 1%-5%.Concrete proportioning can be according to territory of use's salting
In aeolian accumulation sandy soil, salinity kind and ratio, concentration determine.
Described cement specific surface area is not less than 300m2/kg；Described slag specific surface area is not less than 250m2/kg；Described
Activated magnesia specific surface area not less than 300m2/kg；Described modulus of water glass is 2-3.5, and concentration is 20-50 ° of Be '；Described
Sodium hydroxide purity is not less than 95%；Described drift-sand particle diameter is not more than 1mm, and salinity is 0.5%-10%；Described water
For fresh water；Described bubble for use foaming agent generate, described foaming agent be surface activity class foaming agent, protide foaming agent,
Resinae foaming agent, carbonate foaming agent.
Described mineral admixture be meet the flyash of Particle size requirements, silicon ash, slag, red mud mine tailing, non-ferrous metal slag,
A kind of mineral admixture or several mineral admixture in calcining coal gangue powder mix, and the specific surface area of described flyash is not
Less than 400m2/ kg, the specific surface area of silicon ash is not less than 15000m2/ kg, ground steel slag is the least with the specific surface area of non-ferrous metal slag
In 350m2/ kg, the specific surface area of red mud mine tailing is not less than 300m2/ kg, the specific surface area of calcining coal gangue powder is not less than
300m2/kg。
The bubble mixing aeolian accumulation sandy soil of the present invention can coordinate enhancing muscle to use, it is also possible to is used alone, to prepare salting
The component resistant to salt corrosion used in environment and structures.According to structures kind and design requirement, its application process is not quite similar,
Can be the element bubble mixing cast-in-place structures of aeolian accumulation sandy soil or component, it is also possible to being that reinforcement bubble mixing aeolian accumulation sandy soil are cast-in-place constructs
Thing or component.The muscle material of reinforcement can use: basalt fibre muscle, fiberglass reinforced plastics muscle, carbon fibre reinforced plastic
Muscle, aromatic polyamide fiber reinforced plastics muscle, bamboo reinforcement, bamboo silk rope, reed muscle.
A kind of bubble mixing aeolian accumulation sandy soil resistant to salt corrosion of the present invention, its preparation method is: to construction area salt
Salinity kind, concentration and the ratio of stain environment are measured, according to saliferous kind and the salinity of salting environment residing for concrete
Determine the concrete proportioning of bubble mixing aeolian accumulation sandy soil；According to the component proportion determined, by cement, slag, activated magnesia, water glass
Glass, sodium hydroxide, drift-sand, mineral admixture are put into blender and are sufficiently mixed, and add water and stir, obtain mixture
Material；In foaming machine, add foaming agent dilute, the compressed air that dilution rear foaming agent pours along with foaming agent, produce gas
Bubble group；The bubble population produced by foaming agent and the mixed material of blender mixing are sufficiently mixed, and obtain bubble mixing aeolian accumulation sandy soil；
Bubble mixing aeolian accumulation sandy soil are constructed and maintenance.
The beneficial effects of the present invention is:
(1) the bubble mixing aeolian accumulation sandy soil resistant to salt corrosion that the present invention provides can condense hardening, development in salting environment
And keep intensity, there is good water stability, salt erodibility endurance and impermeability, it is adaptable to the salinized soil that normal concrete cannot use
Environment.
(2) the bubble mixing aeolian accumulation sandy soil resistant to salt corrosion that the present invention provides can make full use of salting desert area and deposit in a large number
Drift-sand resource, can gather materials on the spot, preparation cost is cheap, be suitable for large-scale engineer applied.
Detailed description of the invention
The bubble mixing aeolian accumulation sandy soil a kind of resistant to salt corrosion provided the present invention below in conjunction with embodiment are made furtherly
Bright.The present invention is not limited by following embodiment, can determine concrete reality according to technical scheme and practical situation
Execute mode.
Embodiment 1
The bubble mixing aeolian accumulation sandy soil a kind of resistant to salt corrosion proposed in the present invention are made a strength test, uses 5% water
Mud, 20% slag, 5% activated magnesia, 5% waterglass, 2% sodium hydroxide, 37% drift-sand, 25% water, 1% bubble mixing
Mixing becomes bubble mixing aeolian accumulation sandy soil, wherein cement specific surface area 340m2/kg；Slag specific surface area 300m2/kg；Active oxidation
Magnesium specific surface area 300m2/kg；Modulus of water glass is 3, and concentration is 35 ° of Be '；Sodium hydroxide purity 97%；Drift-sand particle diameter 1mm,
Salinity is 1%；Water is local common fresh water；Bubble generates for using surface activity class foaming agent.The bubble mixing that mixing becomes
It is in 150mm concrete cube die trial that aeolian accumulation sandy soil jolt ramming loads the length of side, by above-mentioned bubble mixing drift-sand after the hardening demoulding
Soil is in fresh water, salt and buries and is overlying on maintenance under salinized soil environment, and ambient temperature controls at 20 ± 2 DEG C.Concrete bearing intension testing is pressed
Carrying out according to " standard for test methods of mechanical properties of ordinary concrete " (GB/T50081-2002), comprcssive strength is shown in Table 1:
Table 1 bubble mixing aeolian accumulation sandy soil intensity contrast in fresh water, salt and salinized soil
Data from table, after 360d maintenance, bubble mixing aeolian accumulation sandy soil intensity in salt and salinized soil is higher than
Its intensity in fresh water, and during rear age, the bubble mixing aeolian accumulation sandy soil intensity of maintenance in salt and salinized soil increases
Amount is higher than fresh water maintenance.Result of the test illustrates that a kind of bubble mixing aeolian accumulation sandy soil resistant to salt corrosion of the present invention can apply to
In salting environment, and keep intensity stabilization and good salt erodibility endurance, meet structures in salting environment to intensity and durable
The requirement of property.
Embodiment 2
Certain desert highway embankment uses bubble mixing aeolian accumulation sandy soil, filling-up thickness 3m, treated length 200m.According to work
Journey exploration report learns that this saline soil area drift-sand salinity is 2.2%, and the content of leading ion is: Ca2+: 0.1%, Mg2 +: 0.2%, K+/Na+: 0.5%, SO4 2-: 0.6%, Cl-: 0.8%.Tie according to above-mentioned salinized soil saliferous kind and salinity analysis
Really, bubble mixing aeolian accumulation sandy soil are prepared by the percentage by weight of following raw material: 10% cement, 15% slag, 3% active oxidation
Magnesium, 8% waterglass, 3% sodium hydroxide, 35% drift-sand, 3% mineral admixture, 20% water, 3% bubble.Wherein cement compares table
Area 350m2/kg；Slag specific surface area 300m2/kg；Activated magnesia specific surface area 350m2/kg；Modulus of water glass is 2.5, dense
Degree is 20 ° of Be '；Sodium hydroxide purity 97%；Drift-sand particle diameter 0.6mm, salinity is 2.2%；Mineral admixture be silicon ash and
The mixing admixture of red mud mine tailing, weight ratio respectively accounts for 50%, specific surface area 15000m of silicon ash2/ kg, the ratio of red mud mine tailing
Surface area 300m2/kg；Water is local common fresh water；Bubble generates for using protide foaming agent.
Cement, slag, activated magnesia, waterglass, sodium hydroxide, drift-sand, mineral admixture are put into according to proportioning
It is sufficiently mixed after blender, then is added thereto to water, be uniformly mixing to obtain mixed material；Use reed muscle as the muscle of mixed material
Material, mixes uniform muscle material with mixed material；Adding foaming agent dilute in foaming machine, dilution rear foaming agent is along with sending out
The compressed air that infusion pours, produces bubble population；The bubble population that foaming agent is produced and the reinforcement material mixture of blender mixing
Material is sufficiently mixed, and obtains reinforcement bubble mixing aeolian accumulation sandy soil；Reinforcement air bubble mix light-textured soil is layered step by every layer of 0.5m
Railway embankment, curing age 30 days, curing temperature is 20 ± 2 DEG C, and the air humidity of care environments is 98%.
Embodiment 3
Certain saline soil area, desert road reconstruction, roadbed uses bubble mixing aeolian accumulation sandy soil to process, and roadbed treatment is deep
Degree 0.5m, treated length 500m, subsoil water buried depth 5m.This saline soil area drift-sand salinity is learnt according to engineering investigation report
Being 1.3%, the content of leading ion is: Ca2+: 0.1%, Mg2+: 0.03%, K+/Na+: 0.5%, SO4 2-: 0.07%, Cl-:
0.6%.According to above-mentioned salinized soil saliferous kind and salinity analysis result, prepare bubble by the percentage by weight of following raw material and mix
Conjunction aeolian accumulation sandy soil: 10% cement, 10% slag, 1% activated magnesia, 5% waterglass, 1% sodium hydroxide, 50% drift-sand,
20% water, 3% bubble.Wherein cement specific surface area 350m2/kg；Slag specific surface area 300m2/kg；Activated magnesia specific surface
Long-pending 300m2/kg；Modulus of water glass is 2.5, and concentration is 35 ° of Be '；Sodium hydroxide purity 99%；Drift-sand particle diameter 0.5mm, saliferous
Amount is 1.3%；Water is local common fresh water；Bubble generates for using surface activity class foaming agent.
Cement, slag, activated magnesia, waterglass, sodium hydroxide, drift-sand are put into after blender fully according to proportioning
Mixing, then it is added thereto to water, it is uniformly mixing to obtain mixed material；Foaming agent dilute, dilution is added in foaming machine
The compressed air that rear foaming agent pours along with foaming agent, produces bubble population；The bubble population that foaming agent is produced and blender mixing
Mixed material be sufficiently mixed, obtain bubble mixing aeolian accumulation sandy soil；Air bubble mix light-textured soil is poured by every layer of 0.25m point of two-layer
In roadbed, curing age is 28 days, and curing temperature is 20 DEG C, and the air humidity of care environments is 98%.
Embodiment 4
Certain saline soil area, desert Abutment Back backfill uses bubble mixing aeolian accumulation sandy soil, back filling behind abutment degree of depth 1.5m, place
Reason length 50m.Learn that this saline soil area drift-sand salinity is 4.9% according to engineering investigation report, the content of leading ion
For: Ca2+: 0.8%, Mg2+: 0.6%, K+/Na+: 1.1%, SO4 2-: 2.1%, Cl-: 0.3%.According to above-mentioned salinized soil saliferous kind
Class and salinity analysis result, prepare bubble mixing aeolian accumulation sandy soil by the percentage by weight of following raw material: 3% cement, 22% ore deposit
Slag, 3% activated magnesia, 10% waterglass, 3% sodium hydroxide, 25% drift-sand, 2% mineral admixture, 30% water, 2% gas
Bubble.Wherein cement specific surface area 300m2/kg；Slag specific surface area 280m2/kg；Activated magnesia specific surface area 300m2/kg；Water
Glass modulus is 3, and concentration is 40 ° of Be '；Sodium hydroxide purity 99%；Drift-sand particle diameter 0.5mm, salinity is 4.9%；Mineral
Admixture is the mixing admixture of flyash, slag, and weight ratio respectively accounts for 50%, and specific surface area is 350m2/kg；Water is local
Common fresh water；Bubble generates for using resinae foaming agent.
Cement, slag, activated magnesia, waterglass, sodium hydroxide, drift-sand, mineral admixture are put into according to proportioning
It is sufficiently mixed after blender, then is added thereto to water, be uniformly mixing to obtain mixed material；In foaming machine, add foaming agent and add
Water dilutes, the compressed air that dilution rear foaming agent pours along with foaming agent, produces bubble population；By foaming agent produce bubble population and
The mixed material of blender mixing is sufficiently mixed, and obtains bubble mixing aeolian accumulation sandy soil；By air bubble mix light-textured soil by every layer of 0.5m
Layering directly pours carries on the back in platform, and curing age is 28 days, and curing temperature is 22 DEG C, and the air humidity of care environments is 98%.
Claims (7)
1. bubble mixing aeolian accumulation sandy soil resistant to salt corrosion, including cement, slag, activated magnesia, waterglass, hydroxide
Sodium, drift-sand, mineral admixture, water and bubble.
Bubble mixing aeolian accumulation sandy soil resistant to salt corrosion the most according to claim 1, it is characterised in that: each components by weight
For, cement 3%-25%, slag 8%-25%, activated magnesia 1%-5%, waterglass 1%-10%, sodium hydroxide 0.5%-
3%, drift-sand 5%-70%, mineral admixture 0%-5%, water 15%-30%, bubble 1%-5%.
Bubble mixing aeolian accumulation sandy soil resistant to salt corrosion the most according to claim 1, it is characterised in that: described cement compares table
Area is not less than 300m2/kg；Described slag specific surface area is not less than 250m2/kg；Described activated magnesia specific surface area is not
Less than 300m2/kg；Described modulus of water glass is 2-3.5, and concentration is 20-50 ° of Be '；Described sodium hydroxide purity is not less than
95%；Described drift-sand particle diameter is not more than 1mm, and salinity is 0.5%-10%.Described water is fresh water；Described bubble is
Use foaming agent generates, and described foaming agent is surface activity class foaming agent, protide foaming agent, resinae foaming agent, carbonate
Class foaming agent.
Bubble mixing aeolian accumulation sandy soil resistant to salt corrosion the most according to claim 1, it is characterised in that: described mineral admixture
It is to meet a kind of ore deposit in the flyash of Particle size requirements, silicon ash, slag, red mud mine tailing, non-ferrous metal slag, calcining coal gangue powder
Polymer blends material or several mineral admixture mix.
Bubble mixing aeolian accumulation sandy soil resistant to salt corrosion the most according to claim 4, it is characterised in that: the ratio of described flyash
Surface area is not less than 400m2/ kg, the specific surface area of silicon ash is not less than 15000m2The ratio table of/kg, ground steel slag and non-ferrous metal slag
Area is not less than 350m2/ kg, the specific surface area of red mud mine tailing is not less than 300m2/ kg, the specific surface area of calcining coal gangue powder is not
Less than 300m2/kg。
6. the reinforcement bubble mixing aeolian accumulation that the bubble mixing aeolian accumulation sandy soil resistant to salt corrosion used described in claim 1 make
Sandy soil site concrete, it is characterised in that: the muscle material used is basalt fibre muscle, fiberglass reinforced plastics muscle, carbon fiber
Reinforced plastics muscle, aromatic polyamide fiber reinforced plastics muscle, bamboo reinforcement, bamboo silk rope or reed muscle.
7. the preparation method of the bubble mixing aeolian accumulation sandy soil resistant to salt corrosion described in a claim 1, it is characterised in that: include
Following steps, first, are measured, according to bubble mixing wind salinity kind, concentration and the ratio in salting hooping border, construction area
The saliferous kind of salting environment residing for sand soil and salinity determine the concrete proportioning of bubble mixing aeolian accumulation sandy soil；Next, according to
The component proportion determined, puts into stir cement, slag, activated magnesia, waterglass, sodium hydroxide, drift-sand, mineral admixture
The machine of mixing is sufficiently mixed, and adds water and stirs, obtains mixed material；Then, in foaming machine, add foaming agent and add water dilute
Release, the compressed air that dilution rear foaming agent pours along with foaming agent, produce bubble population；Finally, bubble population foaming agent produced
It is sufficiently mixed with the mixed material of blender mixing, obtains bubble mixing aeolian accumulation sandy soil.
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| CN109467343A (en) * | 2018-11-26 | 2019-03-15 | 天津城建大学 | A kind of lightweight salinized soil |
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| CN115925444A (en) * | 2022-12-13 | 2023-04-07 | 中国电建集团贵阳勘测设计研究院有限公司 | Saline desert sand foam concrete and preparation method thereof |
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| CN109503080A (en) * | 2018-12-25 | 2019-03-22 | 西南石油大学 | A kind of foamed fibre concrete |
| CN115925444A (en) * | 2022-12-13 | 2023-04-07 | 中国电建集团贵阳勘测设计研究院有限公司 | Saline desert sand foam concrete and preparation method thereof |
| CN115925444B (en) * | 2022-12-13 | 2023-10-13 | 中国电建集团贵阳勘测设计研究院有限公司 | Salt water desert sand foam concrete and preparation method thereof |
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