CN112592143A - Clay-slag-based harbor seismic strengthening mineral grouting material and preparation method thereof - Google Patents
Clay-slag-based harbor seismic strengthening mineral grouting material and preparation method thereof Download PDFInfo
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- CN112592143A CN112592143A CN202011488699.2A CN202011488699A CN112592143A CN 112592143 A CN112592143 A CN 112592143A CN 202011488699 A CN202011488699 A CN 202011488699A CN 112592143 A CN112592143 A CN 112592143A
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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
- C04B28/14—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 calcium sulfate cements
- C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/143—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being phosphogypsum
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2038—Resistance against physical degradation
- C04B2111/2053—Earthquake- or hurricane-resistant materials
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/22—Carbonation resistance
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
Abstract
A clay-slag-based mineral grouting material for seismic strengthening of ports and a preparation method thereof relate to a grouting material and a preparation method thereof. The particle size distribution of the powdery clay is that 47.7 percent of the particle size with the particle size less than 0.005mm, 42.9 percent of the particle size with the particle size between 0.005mm and 0.05mm, 9.4 percent of the particle size with the particle size greater than 0.05mm and 13.5 percent of plasticity index, and the slag cementing material consists of 60 to 70 percent of slag micro powder, 6 to 10 percent of phosphogypsum, 10 to 20 percent of clinker excitant, 3 to 8 percent of alkali excitant, 1.5 percent of flexibilizer, 2 to 4 percent of expanding agent, 2 to 5 percent of anti-dispersant and 3 percent of thixotropic agent according to the mass percentage. The main material source is wider, the cost is lower, the process is simple, the setting time of the slurry can be flexibly controlled, and the requirement of the port seismic strengthening performance is met.
Description
Technical Field
The invention relates to a grouting material and a preparation method thereof, in particular to a clay-slag-based grouting mineral material for seismic reinforcement of a port, and belongs to the technical field of seismic reinforcement of liquefiable sandy soil of a high-pile wharf of port engineering.
Background
In order to meet the ever-increasing social demands, port engineering in China is developed more and more, a liquefiable sandy soil foundation of a port is often a bad foundation and has the characteristics of poor bearing capacity, loose structure, large compression deformation and the like, and the problem of seismic reinforcement of the port is attracted more and more. Grouting technology has been developed for a long time in the solution of geotechnical disasters, and is one of the most effective solutions, and the performance of a grouting material is a key factor influencing the grouting effect. Therefore, the prepared grouting material meeting the requirements is important for seismic strengthening of the port.
Port engineering liquefiable sandy soil foundation slip casting requires high requirements for slip casting materials, and includes: high toughness, because the earthquake is an important reason for port engineering damage, the aim of earthquake resistance is achieved, high strength is needed, and the high toughness of the grouting stone body is also a key factor; the corrosion resistance is strong, and the port foundation is in the state of scouring and infiltration of seawater all year round, so that the sandy soil contains a large amount of chloride and sulfate, which requires that the grouting material has strong salt corrosion resistance; the water dispersibility resistance is strong, the port engineering sand foundation usually contains very high water content, and if the water dispersibility resistance of a grouting material is weak, the curing of a grouting stone body is adversely affected; meanwhile, the method has certain requirements on adjustable coagulation time, micro-expansion and good injectability. However, the grouting materials for the liquefiable sandy soil foundation of port engineering are not common at present, and the technology of preparing the grouting materials on the basis of special cement such as sulphoaluminate and aluminate is mostly adopted, so that the requirements of corrosion resistance, micro-expansion and the like can be met, but the grouting materials have few sources and high cost, generate a large amount of greenhouse gas in the production process, and are not suitable for practical application of large-scale grouting engineering. In addition, in the prior art, the toughness problem of the material is solved by using fibers, but the difficulty of grouting construction is increased by adding the fibers, and the actual application of grouting is not facilitated.
The mineral materials such as clay, slag and the like have wide sources and lower prices, the clay can be obtained locally, the transportation cost is reduced, the construction is convenient, and the slag-based grouting material has higher strength, corrosion resistance, carbonization resistance and other properties, and has great application prospect in the grouting direction of the liquefiable sandy soil foundation of port engineering. Meanwhile, organic polymers such as styrene-acrylic emulsion and the like can be uniformly distributed in a cementing material matrix through the functions of film forming, bonding and the like, so that the toughening effect is achieved, and a new idea is provided for curing and toughening of the clay-slag-based grouting material.
Disclosure of Invention
The invention aims to provide a clay-slag-based harbor seismic reinforcement mineral grouting material and a preparation method thereof, the clay-slag-based harbor seismic reinforcement mineral grouting material has wider main material sources, lower cost, no need of calcination, simpler construction process, and flexibly controllable slurry setting time, and meets the harbor seismic reinforcement performance requirement.
In order to achieve the purpose, the invention adopts the following technical scheme:
the clay-slag-based port earthquake-resistant reinforcement mineral grouting material comprises powdery clay and a slag cementing material, wherein the powdery clay is 47.7% of powder with the particle size of less than 0.005mm, 42.9% of powder with the particle size of 0.005-0.05 mm, 9.4% of powder with the particle size of more than 0.05mm and 13.5% of plasticity index, and the slag cementing material consists of 60-70% of slag micro powder, 6-10% of phosphogypsum, 10-20% of clinker exciting agent, 3-8% of alkali exciting agent, 1.5% of toughening agent, 2-4% of expanding agent, 2-5% of anti-dispersing agent and 3% of thixotropic agent in percentage by mass, wherein the slag micro powder is S95-grade micro powder, and CaSO is contained in the phosphogypsum4·2H2The content of O is more than or equal to 85 percent, the clinker activator is 42.5# ordinary portland cement clinker, the alkali activator is one or more of lithium carbonate, sodium silicate and calcium formate, the flexibilizer is styrene-acrylate emulsion and polyvinyl alcohol in a mass ratio of 2:1, the expanding agent is magnesium oxide, the anti-dispersant is polyacrylamide and silica fume in a mass ratio of 1:5, and the thixotropic agent is sodium bentonite.
A preparation method of a clay-slag-based harbor seismic strengthening mineral grouting material comprises the following steps:
the method comprises the following steps: mixing the powdery clay with water, and then uniformly stirring, wherein the water-soil ratio is 0.6-1;
step two: weighing the following dry powder raw materials in percentage by mass: 60-70% of slag micro powder, 6-10% of phosphogypsum, 10-20% of clinker activator, 3-8% of alkali activator, 2-4% of expanding agent, 2-5% of anti-dispersant and 3% of thixotropic agent, uniformly mixing, adding water into the mixture according to the water-cement ratio of 0.6-1 while stirring to form slurry, and then adding 1.5% by mass of styrene-acrylate emulsion and polyvinyl alcohol into the slurry to be uniformly mixed, wherein the mass ratio of the styrene-acrylate emulsion to the polyvinyl alcohol is 2: 1;
step three: and (3) pouring the components obtained in the step one into the components obtained in the step two while stirring, and uniformly stirring to obtain the clay-slag-based harbor seismic strengthening mineral grouting material, wherein the mass ratio of the components obtained in the step one to the components obtained in the step two is 0.2-0.4: 1.
Compared with the prior art, the invention has the beneficial effects that:
1. the grouting material mainly comprises powdery clay and slag micropowder, has lower cost and wider source compared with special cement such as sulphoaluminate, aluminate and the like, does not need to be calcined, has simpler construction process, and can ensure higher strength, corrosion resistance and carbonization resistance;
2. the grouting material can flexibly control the slurry coagulation time by adjusting the ratio of the clinker activator to the alkali activator, and the initial coagulation time of the grouting material can be adjusted within 25-320 min;
3. the grouting material provided by the invention has the advantages that the toughness, expansibility, water dispersibility resistance and groutability of a grouting stone body are obviously enhanced by adding a small amount of high molecular polymer and mineral additives, the performance requirements of seismic grouting reinforcement of a liquefiable sandy soil foundation of a coastal port can be met, and a good effect is achieved.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the invention, rather than all embodiments, and all other embodiments obtained by those skilled in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.
The first embodiment is as follows: the invention discloses a clay-slag-based harbor seismic strengthening mineral grouting material which comprises silty clay and a slag cementing material, wherein the particle size distribution of the silty clay is that 47.7 percent of the particle size of less than 0.005mm, 42.9 percent of the particle size of 0.005-0.05 mm, 9.4 percent of the particle size of more than 0.05mm and the plasticity index is 13.5, the slag cementing material consists of 60-70 percent of slag micro powder, 6-10 percent of phosphogypsum, 10-20 percent of clinker activator, 3-8 percent of alkali activator, 1.5 percent of toughening agent, 2-4 percent of expanding agent, 2-5 percent of anti-dispersant and 3 percent of thixotropic agent according to mass percentage, wherein the slag micro powder is S95 grade slag micro powder, and CaSO in the phosphogypsum is4·2H2The content of O is more than or equal to 85 percent, the phosphogypsum is similar to natural gypsum and can react with C-A-H to generate ettringite to fill the pores in the sample and improve the compactness of the sample, and the phosphogypsum has huge solid waste yield, the accumulation of a large amount of phosphogypsum not only occupies land resources, but also has larger pollution to the surrounding environment, so the reasonable utilization of the phosphogypsum has great environment-friendly significance, the clinker excitant is 42.5# common Portland cement clinker, and the excitation of the activity of the slag is to continuously generate OH through the hydration of the clinker-Ion to OH-The slag activating agent is one or more of lithium carbonate, sodium silicate and calcium formate, the alkali activator can quickly activate the slag activity, the slag activating agent and the clinker activator are reasonably matched to achieve the purpose of controllable and adjustable setting time, the toughening agent is styrene-acrylate emulsion and polyvinyl alcohol with the mass ratio of 2:1, the styrene-acrylate emulsion and the polyvinyl alcohol play the roles of film forming, bonding and the like in grouting material slurry and are uniformly distributed in a slurry matrix, the energy consumption capacity in the slurry crack expanding process can be improved, in addition, part of the styrene-acrylate emulsion can form filamentous colloidal substances in the later hydration stage, similar fibers are embedded in the slurry, and therefore the activity activating agent is low in activityThe toughness and the anti-seismic performance of the grouting stone body are greatly improved, the expanding agent is magnesium oxide, the delayed expansion characteristic of the magnesium oxide can effectively offset the chemical shrinkage and the drying shrinkage of the slag-based cementing material, the micro-expansion can be achieved under the appropriate mixing amount, the anti-dispersing agent is polyacrylamide and silica fume with the mass ratio of 1:5, the polyacrylamide is an organic high polymer and has a long chain structure, a large number of functional groups are arranged on the long chain, the cementing material particles in suspension slurry can be adsorbed and agglomerated into stable existence to form a flocculating body, the silica fume has small particle size, the slurry consistency is increased on one hand, the silica fume particles can be wrapped and adsorbed by polyacrylamide high molecular chains on the other hand, the cohesiveness of a multiphase dispersion system in the slurry is improved, the thickening effect is achieved, in addition, the distance between the molecular chains is shortened, so that the long chains are mutually attracted and connected into a network structure, the particles are not easy to disperse, the anti-dispersion capability is improved, and the thixotropic agent is sodium bentonite.
The second embodiment is as follows: the first embodiment is further described, and the specific surface area of the slag micro powder is 400-440 m2Activity index 102% in 28 days per kg.
The third concrete implementation mode: the first embodiment is further explained, the clinker activator has a specific surface area of 300-350 m2/kg。
The fourth concrete implementation mode: the first embodiment is further described, wherein the viscosity of the styrene-acrylate emulsion in the toughening agent is 800-1000 mPa.s, the pH value is 7-8, and the molecular weight of the polyvinyl alcohol is 18-20 ten thousand.
The fifth concrete implementation mode: the first embodiment is further described, wherein the molecular weight of polyacrylamide in the anti-dispersant is 1000-2000 ten thousand, and the silica fume specific surface area is 15000-20000 m2/kg。
The sixth specific implementation mode: the specific embodiment discloses a preparation method of a clay-slag-based harbor seismic strengthening mineral grouting material, which comprises the following steps:
the method comprises the following steps: mixing the powdery clay with water, and then uniformly stirring, wherein the water-soil ratio is 0.6-1;
step two: weighing the following dry powder raw materials in percentage by mass: 60-70% of slag micro powder, 6-10% of phosphogypsum, 10-20% of clinker activator, 3-8% of alkali activator, 2-4% of expanding agent, 2-5% of anti-dispersant and 3% of thixotropic agent, uniformly mixing, adding water into the mixture according to the water-cement ratio of 0.6-1 while stirring to form slurry, and then adding 1.5% by mass of styrene-acrylate emulsion and polyvinyl alcohol into the slurry to be uniformly mixed, wherein the mass ratio of the styrene-acrylate emulsion to the polyvinyl alcohol is 2: 1;
step three: and (3) pouring the components obtained in the step one into the components obtained in the step two while stirring, and uniformly stirring to obtain the clay-slag-based harbor seismic strengthening mineral grouting material, wherein the mass ratio of the components obtained in the step one to the components obtained in the step two is 0.2-0.4: 1.
Example 1
A clay-slag-based harbor seismic strengthening mineral grouting material comprises powdery clay and a slag cementing material, wherein the particle size distribution of the powdery clay is that 47.7 percent of the particle size with the particle size of less than 0.005mm, 42.9 percent of the particle size with the particle size of 0.005-0.05 mm, 9.4 percent of the particle size with the particle size of more than 0.05mm and the plasticity index is 13.5, the slag cementing material consists of 64 percent of slag micro powder, 6 percent of phosphogypsum, 10 percent of clinker activator, 8 percent of alkali activator, 1.5 percent of flexibilizer, 2.5 percent of expanding agent, 5 percent of anti-dispersant and 3 percent of thixotropic agent according to mass percentage, and the specific surface area of the slag micro powder is 400-440 m2The concrete toughening agent is characterized in that the activity index of the toughening agent is 102% in 28 days, the clinker activator is ordinary portland cement clinker, the alkali activator is lithium carbonate and sodium silicate, the mass ratio of the alkali activator to the ordinary portland cement clinker is 1:1, the toughening agent is composed of styrene-acrylate emulsion with the viscosity of 800-1000 mPa & s and the pH value of 7-8 and polyvinyl alcohol with the molecular weight of 18 ten thousand, the mass ratio of the toughening agent to the ordinary cement toughening agent is 2:1, the expanding agent is magnesium oxide, the anti-dispersing agent is polyacrylamide with the molecular weight of 1000 ten thousand and the specific surface area of 15000-200002The silicon ash composition is characterized by comprising silicon ash and sodium bentonite, wherein the silicon ash comprises silicon ash and silicon ash in a mass ratio of 1:5, and the thixotropic agent is sodium bentonite.
The preparation method comprises the following steps:
the method comprises the following steps: mixing the powdery clay with water, and stirring for 5 minutes until the mixture is uniform, wherein the water-soil ratio is 0.7;
step two: weighing slag micro powder, phosphogypsum, a clinker activator, an alkali activator, an expanding agent, an anti-dispersant and a thixotropic agent according to the mass percentage, putting the materials into a stirrer to be stirred for 5 minutes to be uniformly mixed, then adding water while stirring according to the water-cement ratio of 0.7, and adding styrene-acrylate emulsion and polyvinyl alcohol into the slurry to be uniformly mixed after stirring to obtain uniform slurry;
step three: slowly pouring the components obtained in the step one into the components obtained in the step two while stirring, and uniformly stirring to obtain the clay-slag-based mineral grouting material for seismic strengthening of the port, wherein the mass ratio of the components obtained in the step one to the components obtained in the step two is 0.3:1, and the compressive strength, the flexural strength, the initial setting time and the setting rate of the slurry are detected, and the specific data are shown in table 1:
TABLE 1
Example 2
A clay-slag-based harbor seismic strengthening mineral grouting material comprises powdery clay and a slag cementing material, wherein the particle size distribution of the powdery clay is that 47.7 percent of the particle size with the particle size of less than 0.005mm, 42.9 percent of the particle size with the particle size of 0.005-0.05 mm, 9.4 percent of the particle size with the particle size of more than 0.05mm and the plasticity index is 13.5, the slag cementing material consists of 64 percent of slag micro powder, 6 percent of phosphogypsum, 14 percent of clinker activator, 6 percent of alkali activator, 1.5 percent of flexibilizer, 2.5 percent of expanding agent, 3 percent of anti-dispersant and 3 percent of thixotropic agent according to mass percentage, and the specific surface area of the slag micro powder is 400-440 m2The concrete toughening agent is characterized in that the activity index of the concrete toughening agent is 102% in 28 days, the clinker activator is ordinary portland cement clinker, the alkali activator is formed by compounding calcium formate and sodium silicate, the mass ratio of the calcium formate to the sodium silicate is 1:1, the toughening agent is composed of styrene-acrylate emulsion with the viscosity of 800-1000 mPa & s and the pH value of 7-8 and polyvinyl alcohol with the molecular weight of 18 ten thousand, the mass ratio of the styrene-acrylate emulsion to the polyvinyl alcohol is 2:1, the expanding agent is magnesium oxide, and the anti-dispersing agent is polypropylene with the molecular weight of 1000 tenEnamides and specific surface areas of 15000 to 20000m2The silicon ash composition is characterized by comprising silicon ash and sodium bentonite, wherein the silicon ash comprises silicon ash and silicon ash in a mass ratio of 1:5, and the thixotropic agent is sodium bentonite.
The preparation method comprises the following steps:
the method comprises the following steps: mixing the powdery clay with water, and stirring for 5 minutes until the mixture is uniform, wherein the water-soil ratio is 0.7;
step two: weighing slag micro powder, phosphogypsum, a clinker activator, an alkali activator, an expanding agent, an anti-dispersant and a thixotropic agent according to the mass percentage, putting the materials into a stirrer to be stirred for 5 minutes to be uniformly mixed, then adding water while stirring according to the water-cement ratio of 0.7, and adding styrene-acrylate emulsion and polyvinyl alcohol into the slurry to be uniformly mixed after stirring to obtain uniform slurry;
step three: slowly pouring the components obtained in the step one into the components obtained in the step two while stirring, and uniformly stirring to obtain the clay-slag-based mineral grouting material for seismic strengthening of the port, wherein the mass ratio of the components obtained in the step one to the components obtained in the step two is 0.3:1, and the compressive strength, the flexural strength, the initial setting time and the setting rate of the slurry are detected, and the specific data are shown in table 2:
TABLE 2
Example 3
A clay-slag-based harbor seismic strengthening mineral grouting material comprises powdery clay and a slag cementing material, wherein the particle size distribution of the powdery clay is that 47.7 percent of the particle size with the particle size of less than 0.005mm, 42.9 percent of the particle size with the particle size of 0.005-0.05 mm, 9.4 percent of the particle size with the particle size of more than 0.05mm and the plasticity index is 13.5, the slag cementing material consists of 61.5 percent of slag micro powder, 6 percent of phosphogypsum, 18 percent of clinker excitant, 3 percent of alkali excitant, 1.5 percent of flexibilizer, 4 percent of expanding agent, 3 percent of anti-dispersant and 3 percent of thixotropic agent according to mass percentage, and the specific surface area of the slag micro powder is 400-440 m2Per kg, the 28-day activity index is 102 percent, the clinker activator is ordinary portland cement clinker, and the alkali activator is lithium carbonate and sodium silicateThe toughening agent is compounded by the following components in a mass ratio of 1:1, the toughening agent is composed of styrene-acrylate emulsion with viscosity of 800-1000 mPas and pH value of 7-8 and polyvinyl alcohol with molecular weight of 18 ten thousand, the mass ratio is 2:1, the swelling agent is magnesium oxide, the anti-dispersing agent is polyacrylamide with molecular weight of 1000 ten thousand and the specific surface area is 15000-20000 m2The silicon ash composition is characterized by comprising silicon ash and sodium bentonite, wherein the silicon ash comprises silicon ash and silicon ash in a mass ratio of 1:5, and the thixotropic agent is sodium bentonite.
The preparation method comprises the following steps:
the method comprises the following steps: mixing the powdery clay with water, and stirring for 5 minutes until the mixture is uniform, wherein the water-soil ratio is 0.7;
step two: weighing slag micro powder, phosphogypsum, a clinker activator, an alkali activator, an expanding agent, an anti-dispersant and a thixotropic agent according to the mass percentage, putting the materials into a stirrer to be stirred for 5 minutes to be uniformly mixed, then adding water while stirring according to the water-cement ratio of 0.7, and adding styrene-acrylate emulsion and polyvinyl alcohol into the slurry to be uniformly mixed after stirring to obtain uniform slurry;
step three: slowly pouring the components obtained in the step one into the components obtained in the step two while stirring, and uniformly stirring to obtain the clay-slag-based mineral grouting material for seismic strengthening of the port, wherein the mass ratio of the components obtained in the step one to the components obtained in the step two is 0.3:1, and the compressive strength, the flexural strength, the initial setting time and the setting rate of the slurry are detected, and the specific data are shown in table 3:
TABLE 3
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The clay-slag-based mineral grouting material for seismic strengthening of the port is characterized in that: the efficient composite material comprises powdery clay and a slag cementing material, wherein the powdery clay has particle size distribution of 47.7% of particle size smaller than 0.005mm, 42.9% of particle size 0.005-0.05 mm, 9.4% of particle size larger than 0.05mm and a plasticity index of 13.5, and the slag cementing material consists of 60-70% of slag micro powder, 6-10% of phosphogypsum, 10-20% of clinker activator, 3-8% of alkali activator, 1.5% of toughening agent, 2-4% of expanding agent, 2-5% of anti-dispersant and 3% of thixotropic agent in percentage by mass, wherein the slag micro powder is S95-grade slag micro powder, and CaSO in the phosphogypsum is CaSO4·2H2The content of O is more than or equal to 85 percent, the clinker activator is 42.5# ordinary portland cement clinker, the alkali activator is one or more of lithium carbonate, sodium silicate and calcium formate, the flexibilizer is styrene-acrylate emulsion and polyvinyl alcohol in a mass ratio of 2:1, the expanding agent is magnesium oxide, the anti-dispersant is polyacrylamide and silica fume in a mass ratio of 1:5, and the thixotropic agent is sodium bentonite.
2. The clay-slag-based harbor seismic strengthening mineral grouting material as claimed in claim 1, wherein: the specific surface area of the slag micropowder is 400-440 m2Activity index 102% in 28 days per kg.
3. The clay-slag-based harbor seismic strengthening mineral grouting material as claimed in claim 1, wherein: the clinker aggregateThe specific surface area of the exciting agent is 300-350 m2/kg。
4. The clay-slag-based harbor seismic strengthening mineral grouting material as claimed in claim 1, wherein: the viscosity of styrene-acrylate emulsion in the toughening agent is 800-1000 mPa & s, the pH value is 7-8, and the molecular weight of polyvinyl alcohol is 18-20 ten thousand.
5. The clay-slag-based harbor seismic strengthening mineral grouting material as claimed in claim 1, wherein: the molecular weight of polyacrylamide in the anti-dispersant is 1000-2000 ten thousand, and the specific surface area of silica fume is 15000-20000 m2/kg。
6. The preparation method of the clay-slag-based harbor seismic strengthening mineral grouting material according to claim 1, wherein the grouting material comprises the following steps: the preparation method comprises the following steps:
the method comprises the following steps: mixing the powdery clay with water, and then uniformly stirring, wherein the water-soil ratio is 0.6-1;
step two: weighing the following dry powder raw materials in percentage by mass: 60-70% of slag micro powder, 6-10% of phosphogypsum, 10-20% of clinker activator, 3-8% of alkali activator, 2-4% of expanding agent, 2-5% of anti-dispersant and 3% of thixotropic agent, uniformly mixing, adding water into the mixture according to the water-cement ratio of 0.6-1 while stirring to form slurry, and then adding 1.5% by mass of styrene-acrylate emulsion and polyvinyl alcohol into the slurry to be uniformly mixed, wherein the mass ratio of the styrene-acrylate emulsion to the polyvinyl alcohol is 2: 1;
step three: and (3) pouring the components obtained in the step one into the components obtained in the step two while stirring, and uniformly stirring to obtain the clay-slag-based harbor seismic strengthening mineral grouting material, wherein the mass ratio of the components obtained in the step one to the components obtained in the step two is 0.2-0.4: 1.
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| CN202011488699.2A CN112592143B (en) | 2020-12-16 | 2020-12-16 | Clay-slag-based harbor seismic strengthening mineral grouting material and preparation method thereof |
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| CN202011488699.2A CN112592143B (en) | 2020-12-16 | 2020-12-16 | Clay-slag-based harbor seismic strengthening mineral grouting material and preparation method thereof |
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| CN112592143B CN112592143B (en) | 2022-05-10 |
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| CN114349443A (en) * | 2021-12-31 | 2022-04-15 | 石家庄铁道大学 | Grouting material for reinforcing medium and coarse sand layer and preparation method thereof |
| CN114436604A (en) * | 2022-01-17 | 2022-05-06 | 哈尔滨工业大学 | Pre-activated clay-fluoroaluminate cement-based grouting material and preparation method thereof |
| CN116003071A (en) * | 2022-12-06 | 2023-04-25 | 中铁十七局集团有限公司 | Anti-dispersion clay-thioaluminate grouting material for karst tunnel moving water blocking and preparation method thereof |
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| CN116003071A (en) * | 2022-12-06 | 2023-04-25 | 中铁十七局集团有限公司 | Anti-dispersion clay-thioaluminate grouting material for karst tunnel moving water blocking and preparation method thereof |
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