CN111116123A - Recycled aggregate fiber concrete for high-speed railway engineering and preparation method thereof - Google Patents
Recycled aggregate fiber concrete for high-speed railway engineering and preparation method thereof Download PDFInfo
- Publication number
- CN111116123A CN111116123A CN202010018590.6A CN202010018590A CN111116123A CN 111116123 A CN111116123 A CN 111116123A CN 202010018590 A CN202010018590 A CN 202010018590A CN 111116123 A CN111116123 A CN 111116123A
- Authority
- CN
- China
- Prior art keywords
- aggregate
- recycled aggregate
- recycled
- concrete
- fiber concrete
- 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
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
-
- 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
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
- C04B2111/90—Electrical properties
- C04B2111/94—Electrically conducting materials
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Bridges Or Land Bridges (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a recycled aggregate fiber concrete for high-speed railway engineering and a preparation method thereof, wherein the recycled aggregate fiber concrete is prepared from the following raw materials in percentage by mass: 37-55% of regenerated coarse aggregate, 17-37% of regenerated fine aggregate, 11-18% of ordinary portland cement, 5-9% of fly ash, 0.2-0.4% of glass fiber, 6-8% of water and 0.15-0.2% of water reducing agent. The aggregate is pretreated by adopting a colloid mill to prepare silica mortar, the aggregate performance is optimized, the working performance of the concrete is improved by combining high-zirconium glass fiber, and the interface transition area is strengthened by utilizing a slurry stone-wrapping process, so that the recycled aggregate fiber concrete which can be used for high-speed railway railings, bridge deck waterproof layers and other parts is prepared. The recycled aggregate fiber concrete provided by the invention fully utilizes the waste self-compacting concrete, can meet the performance requirements of railway engineering structures, and has the advantages of simple formula and preparation method, low cost and wide application value.
Description
The technical field is as follows:
the invention belongs to the technical field of concrete, and particularly relates to recycled aggregate fiber concrete for high-speed railway engineering and a preparation method thereof.
Background art:
CRTS
the slab ballastless track structure is taken as an independent innovation technology, less experience can be used for reference in the construction process, particularly in the aspect of self-compacting concrete technology, only a small amount of construction application in a turnout area is carried out in the early stage, and the structural forms are all different. CRTS
The filling layer in the slab ballastless track structure is a thin panel structure with narrow and closed spaceAnd the cavity is internally provided with barriers such as a steel bar net and the like, only the self-compacting concrete can be filled in the cavity, and the self-compacting concrete and the track slab are required to be well bonded together to form an integral common bearing acting force. Therefore, ordinary self-compacting concrete cannot satisfy CRTS
The filling requirement of a filling layer of a slab ballastless track structure is met, and meanwhile, a professional self-compacting concrete construction team, construction equipment and a mature construction process are lacked, and in addition, the high sensitivity of the self-compacting concrete causes the problem that the loss rate is greatly higher than that of other concretes in the self-compacting concrete construction. If the concrete quality is not properly controlled and not strictly managed, the loss rate of the self-compacting concrete can reach more than 30 percent at most. If a large amount of waste self-compacting concrete is not reasonably utilized and is stacked or buried in the open air, a large amount of land resources are occupied, the problem of environmental pollution is caused, and great negative effects are brought to the society, the environment and the resources.
The regeneration and utilization of the construction waste in China has a certain achievement in the aspects of laboratory research and market application, most of the waste in the existing construction waste can be used as regeneration resources after being sorted, rejected and crushed, metal waste materials can be recycled, solid construction waste can be cleaned, crushed and screened by construction waste treatment equipment to form reasonably graded coarse and fine aggregates to replace the traditional natural aggregates to prepare the recycled aggregate concrete, the problem that the natural and high-quality aggregates are increasingly lacked is solved, and a large amount of construction solid waste has serious influence on ecology, so that great social, environmental and economic benefits are brought. For example, CN108751854A discloses a method for preparing recycled aggregate concrete, which reduces the absorption of water by the concrete, thereby reducing the flaking of the recycled aggregate concrete caused by freezing and thawing and weathering, and increasing the service life of the recycled aggregate concrete. CN109265087A discloses a road recycled aggregate pervious concrete and a preparation method thereof, which increases the toughness and strength of the recycled aggregate pervious concrete to obtain the high-strength high-toughness recycled aggregate pervious concrete.
The conventional concrete is mostly adopted in the prior art, the recycled aggregate prepared by the self-compacting concrete with high gel material dosage is not provided, and the recycled aggregate is mainly applied to the projects of building construction, highways, municipal works and the like, and still belongs to the blank in the railway field. The invention provides recycled aggregate fiber concrete with strength of C40 or below for high-speed railway railings, protective fences, roadbed hexagonal blocks, bridge deck waterproofing and the like and a preparation method thereof. The method has the advantages that the water absorption rate of the recycled aggregate can be effectively reduced by adopting the ultra-dispersed silica mortar for carrying out the pretreatment of the recycled aggregate, the working performance of the concrete can be effectively improved and the segregation and bleeding phenomenon can be reduced by adopting the glass fiber to replace the traditional polyacrylonitrile fiber, the negative influence of the water absorption of the recycled aggregate on the working performance, the mechanical performance and the durability of the concrete can be reduced by adopting the aggregate pulp wrapping process to prepare the concrete, and the prepared recycled aggregate fiber concrete for railway engineering has good working performance, durability and proper mechanical performance.
The invention content is as follows:
for existing CRTS
The invention relates to a method for solving the problems of serious waste of self-compacting concrete of a slab ballastless track and the current situation of insufficient application of recycled aggregate concrete, which aims to fully utilize waste self-compacting concrete to build green railway engineering, improves the performance of self-compacting concrete recycled coarse aggregate with high cementing material consumption by silica mortar, and is applied to the preparation of fiber concrete with the strength of C40 and below in high-speed railway engineering.
In order to achieve the purpose, the invention adopts the following technical scheme:
the recycled aggregate fiber concrete for the high-speed railway engineering is characterized by comprising the following components in parts by weight: the raw materials for the recycled aggregate fiber concrete comprise the following components in percentage by mass: 37-55% of regenerated coarse aggregate, 17-37% of regenerated fine aggregate, 11-18% of ordinary portland cement, 5-9% of fly ash, 0.2-0.4% of glass fiber, 6-8% of water and 0.15-0.2% of water reducing agent, wherein the sum of the percentages of the raw materials is 100%.
The recycled aggregate needs to be soaked in silica mortar for not less than 2 hours, and the silica mortar is prepared by uniformly premixing silica mortar and water in a mass ratio of 1: 5-1: 10, and then grinding for not less than 2 minutes by using a colloid mill. The silica mortar fully fills the cracks of the recycled aggregate, so that the water absorption of the recycled aggregate is effectively reduced; and the pre-wet recycled aggregate can provide moisture for cement hydration, and the hydration degree of the cementing material is improved.
The strength grade of the ordinary portland cement is not lower than 42.5MPa, and the fly ash is
And (3) grade fly ash.
The glass fiber adopts high-zirconium alkali-resistant glass fiber, ZrO2The content of the glass fiber is more than 16.5 percent, the glass fiber is formed by compounding dispersed fibers with the length of 12mm and reinforced fibers with the length of 36mm according to the mass ratio of 1:5, and the glass fiber is used for reducing the bleeding phenomenon of concrete and effectively improving the working performance of the concrete.
The preparation method of the recycled aggregate fiber concrete for the high-speed railway engineering comprises the following steps: 1) adding cement, fly ash, water and a water reducing agent into a stirrer in proportion, and stirring for 30 s; 2) then adding the recycled coarse aggregate and the recycled fine aggregate into a stirrer, and stirring for 90 s; 3) finally, adding two types of glass fibers and stirring for 60s to finish the preparation of the recycled aggregate fiber concrete. The aggregate is wrapped by the pre-stirred slurry, so that the transition area of the concrete interface can be obviously strengthened, and the aims of improving the mechanical property, the durability and the volume stability of the concrete are fulfilled.
The specific implementation mode is as follows:
the technical solution of the present invention will be further specifically described below by way of examples.
Example 1:
the recycled aggregate fiber concrete for the waterproof protective layer of the bridge deck of the high-speed railway comprises the following components in parts by weight: the dosage of the cementing material is 360 kg/m based on the mass of the raw materials3Wherein the cement consumption is 290kg/m3The using amount of the fly ash is 70kg/m3(ii) a Glass fiber 3kg/m3(ii) a The using amount of the recycled fine aggregate is 862kg/m3The using amount of the recycled coarse aggregate is 1053kg/m3(the particle size of the recycled coarse aggregate is 5-10 mm); 140kg/m water3(ii) a 4kg/m of water reducing agent3。
The production process of the recycled aggregate fiber concrete for the waterproof protective layer of the bridge deck of the high-speed railway comprises the following steps: (1) firstly, pretreating recycled aggregate, soaking the recycled aggregate in silica mortar for not less than 2 hours, uniformly premixing the silica mortar and water in a mass ratio of 1: 5-1: 10, and then grinding for not less than 2 minutes by using a colloid mill; (2) and secondly, putting the powder material, water and the water reducing agent into a stirrer to be stirred and mixed for 30s, putting the pretreated recycled coarse and fine aggregates into the stirrer to be stirred for 90s, and finally putting the fibers and stirring for 60s to finish the preparation of the recycled aggregate concrete.
Example 2:
the recycled aggregate fiber concrete for the high-speed railway railings comprises the following components in parts by weight: the usage amount of the cementing material is 279 kg/m based on the mass of the raw materials3Wherein the cement consumption is 195kg/m3The using amount of the fly ash is 84kg/m3(ii) a Glass fiber 1kg/m3(ii) a The dosage of the recycled fine aggregate is 859kg/m3The dosage of the recycled coarse aggregate is 968kg/m3(ii) a The water consumption is 156kg/m3(ii) a The dosage of the water reducing agent is 2.79kg/m3。
The production process of the recycled aggregate fiber concrete for the waterproof protective layer of the bridge floor of the high-speed railway comprises the following steps: (1) firstly, pretreating recycled aggregate, soaking the recycled aggregate in silica mortar for not less than 2 hours, uniformly premixing the silica mortar and water in a mass ratio of 1: 5-1: 10, and then grinding for not less than 2 minutes by using a colloid mill; (2) and secondly, putting the powder material, water and the water reducing agent into a stirrer to be stirred and mixed for 30s, putting the pretreated recycled coarse and fine aggregates into the stirrer to be stirred for 90s, and finally putting the fibers and stirring for 60s to finish the preparation of the recycled aggregate concrete.
In the above examples 1-2, the properties of the recycled aggregate fiber concrete prepared were as follows:
from the test results, the recycled aggregate fiber concrete for the high-speed railway engineering can meet the concrete strength requirement of C40 and below, has good frost resistance and compactness, is suitable for waterproof protective layers and auxiliary structural members of railway bridge floors, realizes recycling of waste self-compacting concrete, and has strong social and economic benefits.
The foregoing description of the embodiments is provided to enable those of ordinary skill in the art to understand and utilize the embodiments. Various modifications to these embodiments will be readily apparent to those skilled in the art, in light of the specification, and the generic principles defined herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the embodiments described herein, and those skilled in the art should make improvements and modifications to the present invention based on the disclosure of the present invention within the protection scope of the present invention.
Claims (7)
1. The recycled aggregate fiber concrete for the high-speed railway engineering is characterized by comprising the following components in parts by weight: the raw materials for the recycled aggregate fiber concrete comprise the following components in percentage by mass: 37-55% of regenerated coarse aggregate, 17-37% of regenerated fine aggregate, 11-18% of ordinary portland cement, 5-9% of fly ash, 0.2-0.4% of glass fiber, 6-8% of water and 0.15-0.2% of water reducing agent, wherein the sum of the percentages of the raw materials is 100%.
2. The recycled aggregate fiber concrete according to claim 1, wherein: recycled aggregate consisting of CRTS
The self-compacting concrete of the slab ballastless track is formed by crushing and shaping, wherein the particle size of the coarse aggregate is divided into a single particle fraction of 5-10 mm and a continuous fraction of 5-20 mm, the particle size of the fine aggregate is not more than 5mm, and the recycled aggregate is adopted to completely replace natural aggregate.
3. The recycled aggregate fiber concrete according to claim 1, wherein: the recycled aggregate needs to be soaked in silica mortar for not less than 2 hours, and the silica mortar is prepared by uniformly premixing silica mortar and water in a mass ratio of 1: 5-1: 10, and then grinding for not less than 2 minutes by using a colloid mill.
4. The recycled aggregate fiber concrete according to claim 1, wherein: the strength grade of the ordinary portland cement is not lower than 42.5MPa, and the fly ash is
And (3) grade fly ash.
5. The recycled aggregate fiber concrete according to claim 1, wherein: the glass fiber adopts high-zirconium alkali-resistant glass fiber, ZrO2The content of the glass fiber is more than 16.5 percent, and the glass fiber is formed by compounding dispersed fibers with the length of 12mm and reinforced fibers with the length of 36mm according to the mass ratio of 1: 5.
6. The method for preparing recycled aggregate fiber concrete according to claim 1, wherein:
the method specifically comprises the following steps:
1) adding cement, fly ash, water and a water reducing agent into a stirrer in proportion, and stirring for 30 s;
2) then adding the recycled coarse aggregate and the recycled fine aggregate into a stirrer, and stirring for 90 s;
3) finally, adding two types of glass fibers and stirring for 60s to finish the preparation of the recycled aggregate fiber concrete.
7. The recycled aggregate fiber concrete according to claim 1, wherein: the recycled aggregate fiber concrete is mainly used for parts such as railings of high-speed railways, waterproof layers of bridge floors and the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010018590.6A CN111116123A (en) | 2020-01-08 | 2020-01-08 | Recycled aggregate fiber concrete for high-speed railway engineering and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010018590.6A CN111116123A (en) | 2020-01-08 | 2020-01-08 | Recycled aggregate fiber concrete for high-speed railway engineering and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111116123A true CN111116123A (en) | 2020-05-08 |
Family
ID=70487412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010018590.6A Pending CN111116123A (en) | 2020-01-08 | 2020-01-08 | Recycled aggregate fiber concrete for high-speed railway engineering and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111116123A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111548104A (en) * | 2020-06-01 | 2020-08-18 | 中国建材检验认证集团北京天誉有限公司 | Low-water-absorption regenerative GRC material prepared from high belite sulphoaluminate cement |
| CN114716211A (en) * | 2022-05-12 | 2022-07-08 | 济南大学 | Reinforcement method of recycled coarse aggregate, and reinforced recycled coarse aggregate and concrete obtained by reinforcement method |
| CN114809813A (en) * | 2022-05-13 | 2022-07-29 | 深圳市特区建工绿志环境科技有限公司 | Recycled aggregate railing post and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103121819A (en) * | 2013-03-05 | 2013-05-29 | 北京新奥混凝土集团有限公司 | C30 self-compacting concrete prepared from recycled aggregate and preparation method thereof |
| CN104788054A (en) * | 2015-04-10 | 2015-07-22 | 浙江大学宁波理工学院 | Eco-friendly self-compacting concrete prepared through complete recycling of waste concrete |
| CN105439502A (en) * | 2015-10-22 | 2016-03-30 | 中铁四局集团有限公司 | Self-compacting concrete for CRTS III slab ballastless track filling layer and preparation method thereof |
| CN106007438A (en) * | 2016-05-24 | 2016-10-12 | 湖南大学 | Treatment method of volcanic-ash-paste-reinforced recycled concrete aggregate |
| CN109336439A (en) * | 2018-11-08 | 2019-02-15 | 湖南大学 | The method and device of volcano mortar negative pressure immersion treatment intensifying regenerating aggregate |
| CN109397521A (en) * | 2018-10-19 | 2019-03-01 | 德阳科吉高新材料有限责任公司 | A kind of manufacturing process of high-speed rail plate |
-
2020
- 2020-01-08 CN CN202010018590.6A patent/CN111116123A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103121819A (en) * | 2013-03-05 | 2013-05-29 | 北京新奥混凝土集团有限公司 | C30 self-compacting concrete prepared from recycled aggregate and preparation method thereof |
| CN104788054A (en) * | 2015-04-10 | 2015-07-22 | 浙江大学宁波理工学院 | Eco-friendly self-compacting concrete prepared through complete recycling of waste concrete |
| CN105439502A (en) * | 2015-10-22 | 2016-03-30 | 中铁四局集团有限公司 | Self-compacting concrete for CRTS III slab ballastless track filling layer and preparation method thereof |
| CN106007438A (en) * | 2016-05-24 | 2016-10-12 | 湖南大学 | Treatment method of volcanic-ash-paste-reinforced recycled concrete aggregate |
| CN109397521A (en) * | 2018-10-19 | 2019-03-01 | 德阳科吉高新材料有限责任公司 | A kind of manufacturing process of high-speed rail plate |
| CN109336439A (en) * | 2018-11-08 | 2019-02-15 | 湖南大学 | The method and device of volcano mortar negative pressure immersion treatment intensifying regenerating aggregate |
Non-Patent Citations (1)
| Title |
|---|
| 苏磊: "高ZrO2含量耐碱玻璃纤维在桥面保护层中的应用研究", 《科技研究》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111548104A (en) * | 2020-06-01 | 2020-08-18 | 中国建材检验认证集团北京天誉有限公司 | Low-water-absorption regenerative GRC material prepared from high belite sulphoaluminate cement |
| CN114716211A (en) * | 2022-05-12 | 2022-07-08 | 济南大学 | Reinforcement method of recycled coarse aggregate, and reinforced recycled coarse aggregate and concrete obtained by reinforcement method |
| CN114809813A (en) * | 2022-05-13 | 2022-07-29 | 深圳市特区建工绿志环境科技有限公司 | Recycled aggregate railing post and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104030642B (en) | A kind of fibrous concrete | |
| CN106747128B (en) | A kind of big fluidised form High Strength Non-shrinking Filling Material and preparation method thereof | |
| CN101323515B (en) | Ultra-high strong concrete having ultra-high pumping performance and method for preparing the same | |
| CN100434382C (en) | Plastic anti-crack modified fiber of cement-based material and prepn. process | |
| CN111116123A (en) | Recycled aggregate fiber concrete for high-speed railway engineering and preparation method thereof | |
| CN106396555A (en) | Cellulose fiber internal curing-based ultra-high-performance cement-based composite material and preparation method thereof | |
| CN108558304A (en) | A kind of high antiskid long-life ultra-high performance concrete road surface road | |
| CN109053080A (en) | Environmentally friendly high ductility cement-base composite material of one kind and preparation method thereof | |
| CN113816696A (en) | Recycled fine aggregate internal curing-based ultrahigh-performance concrete and preparation method thereof | |
| CN103936318A (en) | Waste fiber recycled aggregate concrete able to improve aggregate performance and preparation method thereof | |
| CN102040360B (en) | Tailing sand brick with high weather resistance and preparation method thereof | |
| CN104628344A (en) | Low-autogenous shrinkage and high-performance recycled concrete | |
| CN111574164A (en) | Rapid repairing material for super-early-strength shrinkage compensation road bridge and preparation method thereof | |
| CN106904870A (en) | A kind of natural fiber reinforced epoxy base concrete and preparation method and application | |
| CN111253127A (en) | C30 carbon fiber broken brick recycled concrete and preparation method thereof | |
| CN112553994A (en) | Composite pavement road with asphalt layer coated on sisal fiber cement-based composite material | |
| CN111362636A (en) | C60 carbon fiber concrete and preparation method thereof | |
| CN108751855A (en) | A kind of water-permeable cement concrete and preparation method thereof mixed with rubber | |
| CN1559966A (en) | Addition for concrete of road for enhacing anti-bending strength | |
| CN108892447A (en) | A kind of toughening type light aggregate concrete | |
| Li et al. | Preparation and mechanical properties of steel fiber reinforced high performance concrete with copper slag as fine aggregate | |
| CN111798931A (en) | Machine-made gravel aggregate prestressed concrete mix proportion design method based on deformation control | |
| Ismail et al. | Mechanical properties and microstructure of recycled mortar reinforced with hybrid fiber | |
| CN114436621A (en) | Alkali-activated composite recycled powder recycled aggregate pervious concrete and preparation method thereof | |
| Ren et al. | Application of sisal fiber powder in ultra-high performance concrete: A renewable material for mitigating autogenous shrinkage |
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 | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200508 |
|
| WD01 | Invention patent application deemed withdrawn after publication |