CN111908884A - Alkali-activated slag-based cement mixture grouting material and preparation method thereof - Google Patents
Alkali-activated slag-based cement mixture grouting material and preparation method thereof Download PDFInfo
- Publication number
- CN111908884A CN111908884A CN202010760282.0A CN202010760282A CN111908884A CN 111908884 A CN111908884 A CN 111908884A CN 202010760282 A CN202010760282 A CN 202010760282A CN 111908884 A CN111908884 A CN 111908884A
- Authority
- CN
- China
- Prior art keywords
- slag
- grouting material
- water
- alkali
- cement
- 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
Links
Images
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
- C04B28/24—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
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
-
- 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
Abstract
The invention relates to an alkali-activated slag-based cement mixture grouting material and a preparation method thereof, wherein the grouting material is prepared from the following raw materials: portland cement, water glass, slag and water. The grouting material prepared by the invention adopts silicate cement, water glass and slag as main mixed materials, and the raw materials are prepared by specific proportions, so that the grouting material has the advantages of good fluidity, controllable setting time, high calculus rate, economy, environmental protection and the like, and the proportion of the slag in slurry has obvious influence on the performance of the grouting material, and the concrete expression is as follows: the larger the slag content is, the smaller the unconfined compressive strength of the slurry is, the smaller the fluidity is, the longer the initial and final setting time is, and the larger the calculus rate is, and the industrial waste slag is adopted in the invention, so that the method has good recycling and great significance for environmental protection.
Description
Technical Field
The invention belongs to the technical field of constructional engineering, and particularly relates to an alkali-activated slag-based cement mixture grouting material and a preparation method thereof.
Background
In recent years, with the increasing of the strength of infrastructure, the treatment of soft soil foundation is inevitable. The grouting method is one of the common methods for treating soft soil foundation, the grouting material is a key factor for influencing the grouting effect, the grouting material is a general name of engineering materials selected for achieving the determined engineering purpose, can exist in a liquid state, is convenient to inject the internal spaces such as cracks, fissures and pores of corresponding media by utilizing the hydraulic pressure, air pressure or electrochemical principle, and has the cementing and curing capacity, so that the leakage channel of the media is blocked, and the physical properties and mechanical properties of the media are improved. The traditional grouting material mostly adopts pure cement slurry, the cement consumption is large, and the economical efficiency is not outstanding. Meanwhile, the continuous expansion of the industrial scale produces a large amount of industrial slag such as slag, which is a slag discharged from a blast furnace during the smelting of pig iron, and is water-quenched and ground to form ground granulated blast furnace slag powder.
The present invention has been made in view of the above circumstances.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the alkali-activated slag-based cement mixture grouting material and the preparation method thereof.
The invention provides an alkali-activated slag-based cement mixture grouting material, which is prepared from the following raw materials: portland cement, water glass, slag and water.
Furthermore, the modulus of the water glass is 3.3, the baume degree is 35 Be degrees, and the main components of the slag are CaO and MgO.
The Portland cement in the invention is P.O 42.5 ordinary Portland cement.
Furthermore, the water-solid ratio is 0.6-0.8.
Further, the mass ratio of the portland cement to the slag is 0.25-1.5: 1.
Furthermore, the mass ratio of the water glass to the solid phase is 2-4%.
The second object of the present invention is to provide a method for preparing the alkali-activated slag-based cement mixture grouting material, comprising the steps of:
(1) weighing the raw materials according to the weight of the raw materials for later use;
(2) and adding the portland cement, the water glass and the slag into a stirring device, adding water, stirring for the first time, stopping stirring, and stirring for the second time to obtain the grouting material.
Pouring the prepared grouting material into a standard mould with the thickness of 100 multiplied by 100mm, vibrating uniformly, standing for 24 hours, demoulding after the grouting material is coagulated and hardened, and delivering the grouting material into a standard curing chamber for curing.
Further, the time for the first stirring in the step (2) is 110-130s, and the stirring is stopped for 12-18 s.
Further, the time for the first stirring in step (2) was 120s, and the stirring was stopped for 15 s.
Further, the time for the second stirring in step (2) is 110-.
Further, the time for the second stirring in the step (2) is 120 s.
Compared with the prior art, the invention has the beneficial effects that:
the grouting material prepared by the invention adopts silicate cement, water glass and slag as main mixed materials, and the raw materials are prepared by specific proportions, so that the grouting material has the advantages of good fluidity, controllable setting time, high calculus rate, economy, environmental protection and the like, and the proportion of the slag in slurry has obvious influence on the performance of the grouting material, and the concrete expression is as follows: the larger the slag content is, the smaller the unconfined compressive strength of the slurry is, the smaller the fluidity is, the longer the initial and final setting time is, and the larger the calculus rate is, and the industrial waste slag is adopted in the invention, so that the method has good recycling and great significance for environmental protection.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a graph of the initial setting time of the slurry in accordance with the present invention as a function of water-to-ash ratio and slag content;
FIG. 2 is a graph of final set time of the slurry in relation to water-ash ratio and slag content in the present invention;
FIG. 3 is a graph of fluidity of slurry in relation to water-ash ratio and slag content in the present invention;
FIG. 4 is a graph of calculus rate versus water-cement ratio and slag content in accordance with the present invention;
FIG. 5 is a microscopic image of the slag after curing for 28 days with a water-cement ratio of 0.6 and a slag content of 40%;
FIG. 6 is a microscopic image of the slag after curing for 28 days with a slag content of 40% and a water-cement ratio of 0.8;
FIG. 7 is a microscopic image of the slag after curing for 3d with a slag content of 40% and a water-cement ratio of 0.6;
FIG. 8 is a microscopic image of the slag cured for 3 days at a water-cement ratio of 0.8 and a slag content of 40%.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Example 1
The alkali-activated slag-based cement mixture grouting material of the embodiment is prepared from the following raw materials: the water glass cement mortar comprises portland cement, water glass, slag and water, wherein the modulus of the water glass is 3.3, the baume degree is 35 Bee degrees, the slag mainly comprises CaO and MgO, the water-solid ratio is 0.6, the mass ratio of the portland cement to the slag is 0.25:1, and the mass ratio of the water glass to the solid phase is 2%.
The preparation method of the grouting material of the embodiment comprises the following steps:
(1) weighing the raw materials according to the weight of the raw materials for later use;
(2) and adding the portland cement, the water glass and the slag into a stirring device, adding water, stirring for the first time, stopping stirring for 18s, and stirring for the second time, wherein the stirring time for the second time is 110s, so as to obtain the grouting material.
Example 2
The alkali-activated slag-based cement mixture grouting material of the embodiment is prepared from the following raw materials: the water glass cement mortar comprises portland cement, water glass, slag and water, wherein the modulus of the water glass is 3.3, the baume degree is 35 Bee degrees, the slag mainly comprises CaO and MgO, the water-solid ratio is 0.7, the mass ratio of the portland cement to the slag is 0.625:1, and the mass ratio of the water glass to the solid phase is 3%.
The preparation method of the grouting material of the embodiment comprises the following steps:
(1) weighing the raw materials according to the weight of the raw materials for later use;
(2) and adding the portland cement, the water glass and the slag into a stirring device, adding water, stirring for the first time, stopping stirring for 15s, and stirring for the second time, wherein the stirring time for the second time is 120s, so as to obtain the grouting material.
Example 3
The alkali-activated slag-based cement mixture grouting material of the embodiment is prepared from the following raw materials: the water glass cement mortar comprises portland cement, water glass, slag and water, wherein the modulus of the water glass is 3.3, the baume degree is 35 Bee degrees, the slag mainly comprises CaO and MgO, the water-solid ratio is 0.8, the mass ratio of the portland cement to the slag is 1.5:1, and the mass ratio of the water glass to the solid phase is 4%.
The preparation method of the grouting material of the embodiment comprises the following steps:
(1) weighing the raw materials according to the weight of the raw materials for later use;
(2) and adding the portland cement, the water glass and the slag into a stirring device, adding water, stirring for the first time, stopping stirring for 12s, and stirring for the second time, wherein the stirring time for the second time is 130s, so as to obtain the grouting material.
Test example 1
Analysis of various properties of the slurry:
(1) the effect of the water-cement ratio and slag content on the initial setting time of the slurry was examined and the other conditions were the same as in example 1, and the results are shown in FIG. 1.
As can be seen from FIG. 1, the initial setting time of the slurry has obvious relationship with the water-cement ratio and the slag content, the setting time ranges from 420 min to 1200min, and the initial setting time of the slurry is obviously increased along with the increase of the slag content in the slurry under the condition of the same water-cement ratio; when the water-cement ratio of the slurry is increased, the water content is increased, when the water quality exceeds the maximum water consumption required by cement clinker hydration, more water cannot bring about the increase of the hydration reaction rate, and on the contrary, because more water objectively increases the distance between solid particles in terms of space, the whole system is more difficult to generate a skeleton structure; meanwhile, the early hydration reaction of the cement is mainly composed of tricalcium silicate (C) in the cement3S) and tricalcium aluminate (C)3A) The two substances have the highest hydration reaction speed and the highest heat release, the temperature in the whole system can be increased to promote the whole cement hydration reaction, and when the water-cement ratio is increased, C3S and C3The total hydration heat release amount of the A is not increased, and the temperature is not obviously increased for the whole system, so that the hydration reaction speed of the whole cement is not obviously increased.
The initial setting time of the slurry increases with increasing water-cement ratio at the same slag content. An increase in the slag content leads to a decrease in the cement content, substance C for early hydration reactions of cement3A and C3S is correspondingly reduced, the overall hydration speed is inevitably reduced, and the initial setting time is inevitably increased. Although the addition of water glass can cause OH in the whole system－The content is increased, the activity of alkaline slag is excited, and the reaction is promoted to generate Ca (OH)2Also, the initial setting of the slurry can be promoted.
(2) The final setting time of the slurry was examined with respect to the water-cement ratio and the slag content, and the other conditions were the same as in example 1, and the results are shown in Table 2.
As can be seen from fig. 2, the final setting time of the slurry starts to continuously increase with increasing slag content under the same water-cement ratio; the analysis from the perspective of the water cement ratio shows that the mechanism of the influence on the final setting time of the slurry is the same as the initial setting time, but the final setting time of the slurry with the water cement ratio of 0.8 is obviously increased compared with the slurry with the water cement ratio of 0.7, which indicates that the optimal water cement ratio can exist for the composite cement with the type. The greater the slag content, the longer the final setting time of the slurry, which is mainly due to the reduction of the cement content, at C3After the rapid reaction of A is completed, the coagulation and strength of the slurry continue to increase mainly because of C3S and C4Hydration of AF. C3The C-S-H gel generated by S hydration is the main factor of the strength of the slurry, and CaO in the slag is reacted with C in the alkali environment under the action of alkali excitation in the early hardening stage of the slurry2S reaction to C3And S, ensuring that the early hydration reaction of the cement can be continuously carried out.
(3) The fluidity of the slurry was examined in relation to the water-cement ratio and the slag content, and the other conditions were the same as in example 1, and the results are shown in FIG. 3.
As can be seen from fig. 3, the slag content has a significant effect on the fluidity of the slurry, which decreases in increasing slag content at the same water-to-ash ratio; at the same slag content, the fluidity obviously increases with the increase of the water-cement ratio. The reason for this phenomenon is mainly the addition of water glass. The higher the slag content at the time of incorporation of the anhydrous glass means that the less the substance which can be hydrated and the less the substance which can form a gelling property in a short time, and at the same time, since the mineral admixtures such as slag have a morphological effect similar to fly ash, the glass spherical particles thereof can act as a rolling ball lubricant in the whole slurry system, thereby contributing to the increase in fluidity. However, when water glass is added, the water glass undergoes hydrolysis reaction shown in equation (1) and reaction carried out in equation (2), and OH is formed－Greatly improves the alkali environment of the whole system, and is suitable for CaO, MgO and SiO in slag2The activity of the substances has an obvious excitation effect, and the substances are added into the reaction in the system to continuously promote the hydration reaction of the cement to generate CaSiO3As a viscous liquid, it naturally has a significant effect on the reduction of the fluidity of the slurry.
2Na2O·SiO2+2(n+1)H2O→NaOH+nSi(OH)4 (1)
Na2O·nSiO2+Ca(OH)2→(n-1)SiO2+CaSiO3+2NaOH (2)
(4) The relationship between the calculus rate of the slurry and the water-cement ratio and the slag content was examined, and the results are shown in FIG. 4, in which the conditions were otherwise the same as in example 1.
As can be seen from FIG. 4, the calculus rates of the slurries at all the ratios are not greatly different from each other in numerical terms, and the maximum difference is not more than 1.5%, but still a clear rule can be followed under the condition of a single variable. The higher the slag content is, the higher the calculus rate of the slurry is; the greater the water-cement ratio, the lower the calculus rate of the slurry.
The calculus rate of the slurry is closely related to the bleeding property of the slurry, the water cement ratio is increased, the time required for setting and hardening of the cement is longer, the free water is increased, the water is separated from the cement for a long time, the bleeding property of the slurry is increased, and the calculus rate is reduced. The larger the slag content is, the higher the calculus rate of the slurry is, and the main reason is still due to the addition of water glass. In the absence of water glass, the slurry bleeds more severely as the slag content is greater because the hydration rate of the slag is slow and the water retention of the form of the glass spheres is poor. However, after the water glass is added, a large amount of water needs to be continuously added into the reaction due to the same reason as the change of the fluidity, a large amount of water is consumed, and meanwhile, CaSiO generated by the reaction3So that the slurry becomes sticky and the integral calculus rate of the slurry is improved.
(5) The compressive strength of the slurry was examined in relation to the water-cement ratio and the slag content, and the other conditions were the same as in example 1, and the results are shown in tables 1 to 3.
TABLE 1 compression Strength of grouting Material made with a Water cement ratio of 0.6
TABLE 2 compression Strength of grouting Material made with a Water-cement ratio of 0.7
TABLE 3 compression Strength of grouting Material made with a Water cement ratio of 0.8
As can be seen from tables 1-3, the compressive strength of the slurry affects the bearing capacity of the soil body after grouting, and the compressive strength of the slurry test block is reduced along with the increase of the water cement ratio under the conditions of the same age and the same solid-to-cement ratio; under the conditions of the same age and the same water-cement ratio, the compressive strength of the slurry test block is reduced along with the reduction of the slag content; under the conditions of the same water-cement ratio and the same solid phase ratio, the compressive strength of the slurry test block is increased along with the increase of the curing age.
The compressive strength of the slurry is discussed in conjunction with microscopic electron microscopy scanning photographs and XRD patterns. FIGS. 5 and 6 are microscopic images of water-cement ratio of 0.6 and 0.8, respectively, slag content of 40%, age of 28d, compressive strength of the slurry shown in FIG. 5 is 7.9MPa, compressive strength of the slurry shown in FIG. 6 is 3.8MPa, and internal structural differences caused by the difference of water-cement ratio can be clearly seen from the two images, and the most important difference of internal microstructure of the slurry with 0.6 water-cement ratio is as follows compared with the slurry with 0.8 water-cement ratio: (1) the development of needle-punched ettringite (AFt) is obviously better than that of 0.8 water-cement ratio under the water-cement ratio of 0.6; (2) the 0.8 water-cement ratio slurry has more than 0.6 water-cement ratio slurry in the inner pores, which is the main reason for the difference of the two strengths. AFt is the cement major hydration product that can crystallize in a short time and rapidly become a skeletal structure with a hard state, providing strength build-up. The formation of the pores is mainly because more free water is remained in the whole system to form water bubbles or slowly evaporates to form air holes and finally leave the pores, and the existence of the pores objectively reduces the actual effective sectional area of the cement paste against load, so that the stress concentration phenomenon is easily caused to cause the strength to be lowered.
The effect of age on slurry strength is very significant, and two distinct differences can be found similarly comparing the two sets of photographs in fig. 5 and 7 and fig. 6 and 8: (1) compared with the internal structure of the slurry in the 3d age, the generation of the needle-like AFt is obviously more in the 28d age; (2) many thin and smooth-surfaced sheet-like objects can be seen on the 3 d-aged microscopic image, while on the 28 d-aged image, the surface of the sheet-like substance is covered with cluster-like substances. The photo-lamellar material is Ca (OH)2The cluster-shaped C-S-H gel is covered on Ca (OH)2On the surface, the hydration of cement proceeds more vigorously in the early stage, but continues in the middle and later stages, and the hydration products that are continuously produced have an effect of promoting the increase in strength. As can be seen from the XRD pattern, the diffraction peaks corresponding to the substances in the 3d and 28d slurries do not have new peaks, but the intensity of the diffraction signals is different, which means that for slurries with the same material ratio, no new substances are generated at different ages, and the increase of the intensity along with the ages is caused by the continuous progress of hydration.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The alkali-activated slag-based cement mixture grouting material is characterized by being prepared from the following raw materials: portland cement, water glass, slag and water.
2. The alkali-activated slag-based cement mixture grouting material according to claim 1, wherein the water glass modulus is 3.3, the baume degree is 35 baue °, and the slag is mainly composed of CaO and MgO.
3. The alkali-activated slag-based cement mixture grouting material according to claim 1 or 2, wherein the water-to-solid ratio is 0.6-0.8.
4. The alkali-activated slag-based cement mixture grouting material according to claim 1 or 2, wherein the mass ratio of portland cement to slag is 0.25-1.5: 1.
5. The alkali-activated slag-based cement mixture grouting material according to claim 1 or 2, wherein the mass ratio of water glass to solid phase is 2-4%.
6. A method for preparing the alkali-activated slag-based cement mixture grouting material according to any one of claims 1 to 5, comprising the steps of:
(1) weighing the raw materials according to the weight of the raw materials for later use;
(2) and adding the portland cement, the water glass and the slag into a stirring device, adding water, stirring for the first time, stopping stirring, and stirring for the second time to obtain the grouting material.
7. The method for preparing an alkali-activated slag-based cement mixture grouting material according to claim 6, wherein the time for the first stirring in step (2) is 110-130s, and is stopped for 12-18 s.
8. The method for preparing an alkali-activated slag-based cement mixture grouting material according to claim 7, wherein the time for the first stirring in step (2) is 120s and 15s are stopped.
9. The method for preparing an alkali-activated slag-based cement mixture grouting material according to claim 6, wherein the time for the second stirring in step (2) is 110-130 s.
10. The method for preparing an alkali-activated slag-based cement mixture grouting material according to claim 6, wherein the time for the second stirring in step (2) is 120 s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010760282.0A CN111908884A (en) | 2020-07-31 | 2020-07-31 | Alkali-activated slag-based cement mixture grouting material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010760282.0A CN111908884A (en) | 2020-07-31 | 2020-07-31 | Alkali-activated slag-based cement mixture grouting material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111908884A true CN111908884A (en) | 2020-11-10 |
Family
ID=73287492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010760282.0A Pending CN111908884A (en) | 2020-07-31 | 2020-07-31 | Alkali-activated slag-based cement mixture grouting material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111908884A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112374784A (en) * | 2020-11-23 | 2021-02-19 | 广西交科集团有限公司 | Coagulant of alkali-activated material at low temperature and use method thereof |
| CN112851289A (en) * | 2021-01-29 | 2021-05-28 | 江苏工程职业技术学院 | Alkali-activated grouting material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006129884A1 (en) * | 2005-06-02 | 2006-12-07 | Kyokado Engineering Co., Ltd. | Plastic gel grout and method of ground reinforcement |
| CN103102128A (en) * | 2013-02-05 | 2013-05-15 | 青岛宝基利工程技术咨询有限公司 | Injecting paste material for underground structure water plugging and preparation method thereof |
| CN103819113A (en) * | 2014-01-15 | 2014-05-28 | 中南大学 | Composite activator for preparing slag early-strength grouting material, grouting material and preparation method of grouting material |
-
2020
- 2020-07-31 CN CN202010760282.0A patent/CN111908884A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006129884A1 (en) * | 2005-06-02 | 2006-12-07 | Kyokado Engineering Co., Ltd. | Plastic gel grout and method of ground reinforcement |
| CN103102128A (en) * | 2013-02-05 | 2013-05-15 | 青岛宝基利工程技术咨询有限公司 | Injecting paste material for underground structure water plugging and preparation method thereof |
| CN103819113A (en) * | 2014-01-15 | 2014-05-28 | 中南大学 | Composite activator for preparing slag early-strength grouting material, grouting material and preparation method of grouting material |
Non-Patent Citations (1)
| Title |
|---|
| 易健胜等: "水玻璃-超细矿渣粉-水泥注浆材料主要性能研究", 《建井技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112374784A (en) * | 2020-11-23 | 2021-02-19 | 广西交科集团有限公司 | Coagulant of alkali-activated material at low temperature and use method thereof |
| CN112851289A (en) * | 2021-01-29 | 2021-05-28 | 江苏工程职业技术学院 | Alkali-activated grouting material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Qian et al. | Activation of blended cements containing fly ash | |
| KR101912626B1 (en) | Mortar composition for repairing and reinforcing underwater concrete structures, and method of repairing and reinforcing underwater concrete structures using the same | |
| CN108793893A (en) | Heat resistance concrete and preparation method thereof | |
| CN110964534B (en) | High-performance environment-friendly soft soil curing agent and preparation method thereof | |
| CN110642582A (en) | Geopolymer-based concrete for block energy storage tower and preparation method thereof | |
| CN109293324A (en) | Full vanadium titanium iron steel smelting slag lightweight concrete and preparation method thereof | |
| JP2001163656A (en) | Hydraulic composition and building material produced from the same | |
| CN113716927A (en) | Phosphogypsum-based soil curing agent, preparation method thereof, cured sample and preparation method thereof | |
| Zhang et al. | Mechanical strength, water resistance and drying shrinkage of lightweight hemihydrate phosphogypsum-cement composite with ground granulated blast furnace slag and recycled waste glass | |
| CN113372029B (en) | Low-carbon type super-sulfate cement, preparation method thereof and cement mortar | |
| CN114349431B (en) | Composite alkali-activated lithium slag low-temperature early-strength concrete and preparation method thereof | |
| CN111908884A (en) | Alkali-activated slag-based cement mixture grouting material and preparation method thereof | |
| CN111847921B (en) | Low clinker cement and preparation method and application thereof | |
| CN114605121B (en) | Tungsten tailing autoclaved aerated concrete and preparation method thereof | |
| CN111285648A (en) | High-durability low-viscosity high-strength machine-made sand concrete, preparation method and application | |
| Yang et al. | Preparation of Environmentally Friendly and Energy-saving Autoclaved Aerated Con-crete using Gold Tailings | |
| CN114249567B (en) | Ultra-high performance concrete and preparation method thereof | |
| CN112441765B (en) | Alkali activator, alkali-activated gel material, concrete and preparation method of concrete | |
| CN114956642A (en) | Composite expanding agent based on regenerated micro powder and preparation method thereof | |
| Tian et al. | Preparation and hydration mechanism of low shrinkage railway sleeper concrete con-taining hot steaming steel slag | |
| CN112358265A (en) | Foam concrete with waste aerated concrete as raw material and preparation method thereof | |
| CN115340340B (en) | Bio-based lightweight aggregate concrete and preparation method thereof | |
| He et al. | Study on the properties of high-performance ground iron and steel slag based on the uniform design | |
| Liu et al. | Study on the performance and reaction mechanism of alkali-activated clay brick with steel slag and fly ash | |
| CN117303855A (en) | Curing agent for quickly curing waste slurry by modified magnesium phosphate cement and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201110 |
|
| RJ01 | Rejection of invention patent application after publication |