CN113698147A - Cement-based composite material, preparation method thereof and floating plate - Google Patents
Cement-based composite material, preparation method thereof and floating plate Download PDFInfo
- Publication number
- CN113698147A CN113698147A CN202110898700.7A CN202110898700A CN113698147A CN 113698147 A CN113698147 A CN 113698147A CN 202110898700 A CN202110898700 A CN 202110898700A CN 113698147 A CN113698147 A CN 113698147A
- Authority
- CN
- China
- Prior art keywords
- parts
- cement
- composite material
- based composite
- shape memory
- 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
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
- E01B1/002—Ballastless track, e.g. concrete slab trackway, or with asphalt layers
-
- 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
- C04B2111/52—Sound-insulating materials
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2204/00—Characteristics of the track and its foundations
- E01B2204/09—Ballastless systems
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2204/00—Characteristics of the track and its foundations
- E01B2204/12—Floating rails or sleepers
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
The disclosure discloses a cement-based composite material, a preparation method thereof and a floating slab. The cement-based composite material comprises: the base material comprises portland cement, silica fume, mineral powder, fly ash, quartz sand, water and a water reducing agent; a shape memory alloy; and synthetic fibers. The cement-based composite material can improve the strength and toughness of the joint area between a plurality of plates forming the floating plate, and greatly reduce the connection length, so that the long floating plate can be applied to rail traffic engineering, the problem of the existing floating plate rail structure is solved, and the durability and the comfort of the floating plate are greatly improved.
Description
Technical Field
The present invention relates to a cement-based composite material, a method for preparing the same, and a floating slab using the same.
Background
The floating plate track structure has better vibration reduction effect and is widely applied to track traffic construction. Most of the current floating slab track structures are formed by connecting a plurality of modularized short slabs (the length is not more than 6 meters) in a hinging mode and the like on a construction site. In the long-time operation process, the floating slab track structure is easily subjected to fatigue failure under the influence of train load and the surrounding environment, the service life of the structure can be greatly reduced, and the safe operation of the train is further influenced. In addition, because adopt modes such as articulated to connect between the modular short slab of polylith, consequently can produce great noise often under the effect of train load, disturb the life of residential area resident easily.
In order to improve the durability and the driving comfort of the floating slab track structure, a plurality of prefabricated plate members can be connected into a long floating slab in a wet joint mode. However, there is currently no suitable wet joint material for joining prefabricated panels. Therefore, there is a need for a new material that meets the strength and durability of the wet joint area between prefabricated panels.
Disclosure of Invention
In view of the deficiencies in the prior art, it is an object of the present disclosure to provide a cement-based composite material, a method of making the same, and a floating slab using the same. The cement-based composite material can improve the strength and toughness of the joint area between a plurality of plates forming the floating plate, and can greatly reduce the length required by connection, so that the long floating plate can be applied to rail traffic engineering, the problem of the existing floating plate rail structure is solved, and the durability and the comfort of the floating plate are greatly improved.
According to one aspect of the present disclosure there is provided a cementitious composite, the cementitious composite comprising: the base material comprises portland cement, silica fume, mineral powder, fly ash, quartz sand, water and a water reducing agent; a shape memory alloy; and synthetic fibers.
Optionally, the shape memory alloy is a shape memory alloy wire.
Optionally, the cement-based composite material comprises the following components in parts by weight: 40-50 parts of Portland cement; 5-15 parts of silica fume; 15-20 parts of mineral powder; 15-20 parts of fly ash; 80-120 parts of quartz sand; 2-4 parts of a water reducing agent; 40-50 parts of water; 6-12 parts of shape memory alloy wires; 2-4 parts of synthetic fibers.
Optionally, the cement-based composite material comprises the following components in parts by weight: 45-50 parts of Portland cement; 10-15 parts of silica fume; 15-20 parts of mineral powder; 15-20 parts of fly ash; 80-100 parts of quartz sand; 2-4 parts of a water reducing agent; 40-50 parts of water; 6-12 parts of shape memory alloy wires; 2-4 parts of synthetic fibers.
Optionally, the shape memory alloy wire has a tensile strength of 1200 mpa or more and an ultimate tensile strain of 15% or more.
Optionally, the synthetic fibers have a tensile strength of greater than or equal to 1600 megapascals.
According to another aspect of the present disclosure, there is also provided a method of preparing a cement-based composite material, the method comprising the steps of: mixing portland cement, silica fume, mineral powder, fly ash and quartz sand according to a proportion to form mixed powder; pouring water and a water reducing agent into the mixed powder according to the proportion and stirring until slurry with fluidity is formed; pouring the shape memory alloy and the synthetic fiber into the slurry according to the proportion, and stirring until the shape memory alloy and the synthetic fiber are dispersed and distributed in the slurry.
Optionally, the cement-based composite material comprises the following components in parts by weight: 40-50 parts of Portland cement; 5-15 parts of silica fume; 15-20 parts of mineral powder; 15-20 parts of fly ash; 80-120 parts of quartz sand; 2-4 parts of a water reducing agent; 40-50 parts of water; 6-12 parts of shape memory alloy wires; 2-4 parts of synthetic fibers.
According to yet another aspect of the present disclosure, there is also provided a floating floor comprising a plurality of panels connected by the above cement-based composite material to form a joint region.
Optionally, the length of the floating plate is 30-60 meters, the number of the plates is 6-10, and the length of the seam area between every two adjacent plates is 20-30 centimeters.
Compared with the prior art, in the cement-based composite material, the preparation method thereof and the floating plate provided by the embodiment of the invention, the Shape Memory Alloy (SMA) wires and the synthetic fibers which are dispersed in the matrix material of the cement-based composite material can greatly improve the bending tensile strength and the toughness of the material, and the super elasticity of the shape memory alloy material can not only enable the microcracks of the material to be automatically closed, but also dissipate the energy input into the structure due to external load. When the cement-based composite material cracks under the action of reciprocating load, the Shape Memory Alloy (SMA) wire can trigger phase change to recover to the original shape after the external load is removed, so that the microcracks in the material are automatically closed, and the durability of the structure can be greatly improved. In addition, the material has super strong bond capacity, can greatly shorten the anchoring length of the reserved steel bars of the floating slab, and can greatly reduce the length of wet joints among plates, so that the application of the long floating slab in rail transit engineering is realized. Furthermore, compared with a large number of prefabricated plate parts used by the existing floating plate track structure, a large number of key vibration isolation parts and original joint connection and disconnection parts can be saved. The floating plate formed can improve the integral rigidity and optimize the arrangement of the vibration isolator, and can also greatly reduce the noise intensity and improve the durability and the comfort.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a flow chart of a method of making a cementitious composite according to one embodiment of the present invention; and
fig. 2 is a schematic structural diagram of a floating plate according to an embodiment of the present invention.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.
The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In some instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring the invention.
The terms "a," "an," "the," "said," and "at least one" are used to indicate the presence of one or more elements/components/parts/etc.; the terms "comprising," "having," and "providing" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.
The technical contents of the present invention will be further described with reference to the accompanying drawings and examples.
The embodiment of the invention provides a cement-based composite material. The cement-based composite material mainly comprises a base material, a shape memory alloy and synthetic fibers. The matrix material is a cement matrix material with ultrahigh toughness designed according to the maximum densification theory, and comprises portland cement, silica fume, mineral powder, fly ash, quartz sand, water and a water reducing agent. Optionally, the water reducing agent is a high range water reducing agent.
In a preferred embodiment of the invention, the shape memory alloy is a Shape Memory Alloy (SMA) wire. The tensile strength of the Shape Memory Alloy (SMA) wire is more than or equal to 1200 MPa, and the ultimate tensile strain is more than or equal to 15%. The synthetic fiber has a tensile strength of 1600 MPa or more. Further, in one embodiment of the present invention, the Shape Memory Alloy (SMA) wires may be about 0.2 mm in diameter and about 15 mm in length.
In an optional embodiment of the invention, the cement-based composite material comprises the following components in parts by weight:
40-50 parts of Portland cement;
5-15 parts of silica fume;
15-20 parts of mineral powder;
15-20 parts of fly ash;
80-120 parts of quartz sand;
2-4 parts of a water reducing agent;
40-50 parts of water;
6-12 parts of shape memory alloy wires;
2-4 parts of synthetic fibers.
On the basis, in a preferred embodiment of the invention, the cement-based composite material comprises the following components in parts by weight:
45-50 parts of Portland cement;
10-15 parts of silica fume;
15-20 parts of mineral powder;
15-20 parts of fly ash;
80-100 parts of quartz sand;
2-4 parts of a water reducing agent;
40-50 parts of water;
6-12 parts of shape memory alloy wires;
2-4 parts of synthetic fibers.
The Shape Memory Alloy (SMA) wires and the synthetic fibers which are dispersed in the matrix material of the cement-based composite material provided by the invention can greatly improve the bending tensile strength and the toughness of the material, and the super elasticity of the shape memory alloy material can not only enable the microcracks of the material to be automatically closed, but also dissipate the energy input into the structure due to external load. When the cement-based composite material cracks under the action of reciprocating load, the Shape Memory Alloy (SMA) wire can trigger phase change to recover to the original shape after the external load is removed, so that the microcracks in the material are automatically closed, and the durability of the structure can be greatly improved. In addition, the material has super strong bond capacity, can greatly shorten the anchoring length of the reserved steel bars of the floating slab, and can greatly reduce the length of wet joints among plates, so that the application of the long floating slab in rail transit engineering is realized.
Further, the invention also provides a preparation method of the cement-based composite material. Referring to fig. 1, a flow chart of a method of making a cementitious composite according to one embodiment of the present invention is shown. Specifically, the method comprises the following steps:
step S10: mixing the portland cement, silica fume, mineral powder, fly ash and quartz sand according to a proportion to form mixed powder. As mentioned above, the Portland cement, the silica fume, the mineral powder, the fly ash and the quartz sand comprise the following components in parts by weight: 40-50 parts of Portland cement; 5-15 parts of silica fume; 15-20 parts of mineral powder; 15-20 parts of fly ash; 80-120 parts of quartz sand. In one embodiment of the invention, the materials can be poured into a forced mixer to be mixed for 1-2 minutes, so that various powders are fully contacted.
Step S20: pouring water and a water reducing agent into the mixed powder according to the proportion and stirring the mixture until slurry with fluidity is formed. As mentioned above, the water and the water reducing agent comprise the following components in parts by weight: 2-4 parts of a water reducing agent; 40-50 parts of water. In an embodiment of the invention, water and the water reducing agent may be poured into the mixed powder fully mixed after the step S10 is completed, and the mixture is stirred for 3 to 5 minutes until the powder becomes a slurry with certain fluidity.
Step S30: pouring the shape memory alloy and the synthetic fiber into the slurry according to the proportion, and stirring until the shape memory alloy and the synthetic fiber are dispersed and distributed in the slurry. As mentioned above, the shape memory alloy wire and the synthetic fiber comprise the following components in parts by weight: 6-12 parts of shape memory alloy wires; 2-4 parts of synthetic fibers. In an embodiment of the present invention, the shape memory alloy wires and the synthetic fibers may be poured into the slurry formed after the step S20 is completed, and stirred for 1-2 minutes until the shape memory alloy wires and the synthetic fibers are completely dispersed in the slurry.
After the steps are completed, the cement-based composite material can be formed.
Further, the invention also provides a floating plate. Referring to fig. 2, a schematic structural diagram of a floating plate according to an embodiment of the present invention is shown. Specifically, the floating plate 1 includes a plurality of plate members 2. The plurality of plate members 2 are connected by the cement-based composite material to form a joint region 3. It should be noted that fig. 2 only illustrates two adjacent plate members 2 and the seam area 3 therebetween. In an alternative embodiment of the invention, the total length of the floating slab is approximately 30-60 meters, and the floating slab is a long floating slab. The total number of plates forming the floating plate is 6-10, and optionally, the total number of plates is 6. Two adjacent plates 2 are connected through the cement-based composite material, the area connected through the cement-based composite material is the joint area 3, and optionally, the length of the joint area 3 is 20-30 cm.
In the embodiment of the invention, as the plurality of plates of the floating plate are connected by using the cement-based composite material disclosed by the invention, the cement-based composite material has super strong bonding capacity, the anchoring length of the reserved steel bars of the floating plate can be greatly shortened, the wet-joint length between the plates (for example, the length of a joint area 3 shown in fig. 2 is 20-30 cm) can be greatly reduced, and the application of the long floating plate in the rail traffic engineering becomes practical. Furthermore, a large number of critical vibration isolation components (about 80 sets) and original joint-to-joint and joint-to-joint connection components (about 144 sets) can be saved relative to the large number of prefabricated plate components (e.g., 42 plates) generally used in the existing floating plate track structure. In addition, the floating plate can improve the overall rigidity and optimize the arrangement of the vibration isolator, greatly reduce the noise intensity and improve the durability and the comfort. After static ultimate load and fatigue load tests, the floating slab connected by the cement-based composite material provided by the invention is found to have no damage to a joint area even if a split surface appears on a plate, and completely meets various requirements provided by the specifications of the track traffic floating slab.
In summary, in the cement-based composite material, the preparation method thereof and the floating plate provided by the embodiments of the present invention, the Shape Memory Alloy (SMA) wires and the synthetic fibers, which are dispersed in the matrix material, of the cement-based composite material can greatly improve the bending tensile strength and the toughness of the material, and the superelasticity of the shape memory alloy material not only can automatically close the microcracks of the material, but also can dissipate the energy input into the structure due to the external load. When the cement-based composite material cracks under the action of reciprocating load, the Shape Memory Alloy (SMA) wire can trigger phase change to recover to the original shape after the external load is removed, so that the microcracks in the material are automatically closed, and the durability of the structure can be greatly improved. In addition, the material has super strong bond capacity, can greatly shorten the anchoring length of the reserved steel bars of the floating slab, and can greatly reduce the length of wet joints among plates, so that the application of the long floating slab in rail transit engineering is realized. Furthermore, compared with a large number of prefabricated plate parts used by the existing floating plate track structure, a large number of key vibration isolation parts and original joint connection and disconnection parts can be saved. The floating plate formed can improve the integral rigidity and optimize the arrangement of the vibration isolator, and can also greatly reduce the noise intensity and improve the durability and the comfort.
Although relative terms, such as "upper" and "lower," may be used in this specification to describe one element of an icon relative to another, these terms are used in this specification for convenience only, e.g., in accordance with the orientation of the examples described in the figures. It will be appreciated that if the device of the icon were turned upside down, the element described as "upper" would become the element "lower". Other relative terms, such as "high," "low," "top," "bottom," "left," "right," and the like are also intended to have similar meanings. When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure.
In the description herein, references to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," etc., indicate that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although the invention has been described with respect to alternative embodiments, it is not intended to be limited thereto. Various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention is subject to the scope defined by the claims.
Claims (10)
1. A cementitious composite, characterized in that the cementitious composite comprises:
the base material comprises portland cement, silica fume, mineral powder, fly ash, quartz sand, water and a water reducing agent;
a shape memory alloy; and
and (3) synthetic fibers.
2. The cementitious composite material as recited in claim 1 wherein the shape memory alloy is a shape memory alloy wire.
3. The cement-based composite material as set forth in claim 2, wherein the cement-based composite material comprises the following components in parts by weight:
40-50 parts of Portland cement;
5-15 parts of silica fume;
15-20 parts of mineral powder;
15-20 parts of fly ash;
80-120 parts of quartz sand;
2-4 parts of a water reducing agent;
40-50 parts of water;
6-12 parts of shape memory alloy wires;
2-4 parts of synthetic fibers.
4. The cement-based composite material as set forth in claim 3, wherein the cement-based composite material comprises the following components in parts by weight:
45-50 parts of Portland cement;
10-15 parts of silica fume;
15-20 parts of mineral powder;
15-20 parts of fly ash;
80-100 parts of quartz sand;
2-4 parts of a water reducing agent;
40-50 parts of water;
6-12 parts of shape memory alloy wires;
2-4 parts of synthetic fibers.
5. The cement-based composite material according to claim 3, wherein the shape memory alloy wire has a tensile strength of 1200 MPa or more and an ultimate tensile strain of 15% or more.
6. The cement-based composite material as claimed in claim 3, wherein the synthetic fibers have a tensile strength of 1600 mpa or more.
7. The preparation method of the cement-based composite material is characterized by comprising the following steps of:
mixing portland cement, silica fume, mineral powder, fly ash and quartz sand according to a proportion to form mixed powder;
pouring water and a water reducing agent into the mixed powder according to the proportion and stirring until slurry with fluidity is formed;
pouring the shape memory alloy and the synthetic fiber into the slurry according to the proportion, and stirring until the shape memory alloy and the synthetic fiber are dispersed and distributed in the slurry.
8. The method for preparing the cement-based composite material according to claim 7, wherein the cement-based composite material comprises the following components in parts by weight:
40-50 parts of Portland cement;
5-15 parts of silica fume;
15-20 parts of mineral powder;
15-20 parts of fly ash;
80-120 parts of quartz sand;
2-4 parts of a water reducing agent;
40-50 parts of water;
6-12 parts of shape memory alloy wires;
2-4 parts of synthetic fibers.
9. A floating floor comprising a plurality of panels joined together by a cementitious composite as claimed in any one of claims 1 to 6 to form a joint area.
10. The floating floor of claim 9, wherein said floating floor has a length of 30 to 60 meters, said number of plate members is 6 to 10, and said seam area between every two adjacent plate members has a length of 20 to 30 centimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110898700.7A CN113698147A (en) | 2021-08-05 | 2021-08-05 | Cement-based composite material, preparation method thereof and floating plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110898700.7A CN113698147A (en) | 2021-08-05 | 2021-08-05 | Cement-based composite material, preparation method thereof and floating plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113698147A true CN113698147A (en) | 2021-11-26 |
Family
ID=78652022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110898700.7A Pending CN113698147A (en) | 2021-08-05 | 2021-08-05 | Cement-based composite material, preparation method thereof and floating plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113698147A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109836102A (en) * | 2019-04-03 | 2019-06-04 | 福州大学 | A kind of SMA-ECC cement-base composite material of crack self-healing and preparation method thereof |
-
2021
- 2021-08-05 CN CN202110898700.7A patent/CN113698147A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109836102A (en) * | 2019-04-03 | 2019-06-04 | 福州大学 | A kind of SMA-ECC cement-base composite material of crack self-healing and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 李奇等: "高性能湿接装配式长型浮置板静动力性能研究" * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107326810B (en) | The reserved grout hole connection method of precast assembly bridge pier | |
| CN104594210B (en) | A kind of concrete prefabricated board and its preparation method and application | |
| CN106013432B (en) | A kind of high ductility prefabricated integral frame interior joint connection structure and construction method | |
| CN110821004B (en) | Assembled wall body using high-ductility TRC composite material as permanent formwork and construction method | |
| CN100386283C (en) | Composite concrete agent | |
| CN108035439A (en) | A kind of rapid coagulation soil assembling type node and its construction method | |
| CN110273481A (en) | A kind of connecting node and its construction method of double steel plate compound shear wall and floor | |
| CN209179247U (en) | A kind of novel precast reinforced concrete shearing force wall connection structure | |
| US11732492B2 (en) | UHPC material for reinforcing existing stone masonry wall and reinforcing method thereof | |
| KR100945141B1 (en) | Lightweight cement composite and manufacturing method thereof | |
| CN104844121A (en) | Non-shrinkage sleeve grouting material and preparation method thereof | |
| CN113698147A (en) | Cement-based composite material, preparation method thereof and floating plate | |
| JP5615015B2 (en) | Seismic reinforcement structure and seismic reinforcement method | |
| TW201718987A (en) | Earthquake-resistant structure and design method thereof realizes inhibition of deviating actual loading force from a calculated value at simple and low cost | |
| CN112110685A (en) | LC40 lightweight aggregate concrete and preparation method thereof | |
| CN105951984B (en) | A kind of high ductility prefabricated integral frame mid-side node connection structure and construction method | |
| CN109235266A (en) | A kind of construction method of toughened internal stress | |
| CN104876518A (en) | Fibrous concrete for permanent shutterings and permanent shuttering device | |
| CN109869011A (en) | A kind of assembled wall body construction reinforcement by connection device | |
| CN104032862B (en) | Assembled girder steel seam line L shape mixing coupled wall and construction method thereof | |
| CN110185141A (en) | A kind of steel plate member that frame structure support reinforcing bar is connect with beam steel | |
| CN112814150B (en) | Rectangular steel sleeve type connection method for basic magnesium sulfate cement concrete assembled frame nodes | |
| CN211949224U (en) | External reinforcing structure with lower strength of grouting material in prefabricated shear wall connecting sleeve | |
| CN105484169B (en) | A kind of plate girder bridge ruggedized construction and its construction method | |
| CN211689866U (en) | High-performance light connecting structure of assembled bent cap-pier |
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 |