CN108569873A - A kind of ECC concrete of high impact-resistant toughness and preparation method thereof - Google Patents
A kind of ECC concrete of high impact-resistant toughness and preparation method thereof Download PDFInfo
- Publication number
- CN108569873A CN108569873A CN201810426931.6A CN201810426931A CN108569873A CN 108569873 A CN108569873 A CN 108569873A CN 201810426931 A CN201810426931 A CN 201810426931A CN 108569873 A CN108569873 A CN 108569873A
- Authority
- CN
- China
- Prior art keywords
- water
- high impact
- concrete
- cement
- ecc 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
- C04B28/04—Portland cements
-
- 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
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to building material technical field, more particularly to a kind of ECC concrete of high impact-resistant toughness and preparation method thereof, the ECC concrete formulations include cement, flyash, quartz sand, water, water-reducing agent, PVA fibers；In preparation process, first by whole flyash, quartz sand, about 50% cement dry mixing, plus water wet-mixing 2min then, then stirring 1.5min is added to mixture in fluidised form in 25% water-reducing agent in four times, 12.5% cement mixing 1min is added to be sufficiently wetted to all particles, whole fibers are added afterwards and mix 3min entirely, last casting stands maintenance 28 days；The present invention optimizes the height cooperation that allocation process realizes PVA fibers with cementitious material basal body interface by a large amount of fly ash on source and in preparation process, greatly improves toughness, realizes the recycling of organic waste.
Description
Technical field
The invention belongs to building material technical field, more particularly to the ECC concrete and its system of a kind of high impact-resistant toughness
Preparation Method.
Background technology
Concrete is as most widely used construction material, but plain concrete there are structural limits stretching strains small, tensile strength
The defects of low, easy to crack, poor impact toughness, big brittleness, people's addition material constantly in plain concrete, enhances its mechanics thus
Performance such as mixes steel fibre, organic synthetic fibers outside.
Organic synthetic fibers include polyvinyl alcohol (PVA) fiber, polyethylene (PE) fiber, polypropylene (PP) fiber etc.,
In it is again most representative with polyvinyl alcohol (PVA) fiber, as a small number of crystalline water-soluble high-molecular materials, have excellent
Hydrophily, fibre forming property, surface characteristic, resistance to acid and alkali and mechanical property, the anti-of concrete can be enhanced in right amount by mixing in concrete
Roll over the indexs such as intensity, shock resistance, ultimate tensile strength, crack resistance.In the developed countries such as America and Europe, Japan, vinal
Concrete is widely used to the laying of roadbed bridge floor, has also put into effect special fibre reinforced concrete design specification.
The PVA fibers for preparing ECC (engineered cementitious composites) at present are mainly produced by the Kuraray Corporation of Japan,
Cost is higher, keeps ECC concrete large-scale application in engineering very difficult.In fact, quality and the production of China's PVA fibers
Scale has reached international most advanced level, and unit cost is relatively low.But domestic PVA fibers cannot be configured by current common match ratio
Excellent properties ECC has been provided, the main reason is that it is too strong with the cohesive action of cement matrix, has easily been broken in withdrawal process,
To which quasi- strain hardening condition cannot be met, so the match ratio of domestic ECC needs to redesign.According to the design of material of ECC
Theory can change domestic PVA and produce mix volume ratios of the PVA in concrete daily, improve the mechanical property of ECC concrete.
Domestic scholars are absorbed in research of the ECC concrete on durability, the impact lotus of rare concern ECC concrete at present
It carries, though foreign scholar has the research in the toughness of ECC concrete, the vinal used is substantially produced daily can
Le Li companies produce, and still rare people studies the toughness of domestic PVA fibers incorporation ECC concrete at present.
Existing we can examine whether the ECC concrete for mixing PVA meets the requirements by the experimental design of shock resistance, test
The method of 544 committees of ACI (ACI) recommendation and reference can be used《Highway engineering cement and cement concrete tries
Test regulation》Carry out the shock resistance that drop hammer test examines concrete.
The mix Design of existing armored concrete substantially according to《Design of common concrete proportioning specification》
It carries out, wherein 35% of volume maximum no more than reference cement dosage of flyash, cement is high production capacity, high pollution production work
The industrial products of skill, it is the tremendous contribution to energy conservation and environmental protection cause to reduce cement consumption.
Chinese patent CN201711245538.9 discloses a kind of Desert Sand PVA fiber high performance concretes, the high property
The group of energy concrete becomes water, cement, flyash, sand, and the sand is made of river sand and Desert Sand；PVA fibers are added in material,
Flexural strength and bending strength are obviously improved, and are higher than normal concrete；But the fiber concrete resistance to shock loads of the technical solution
Ability is weak, and toughness is poor.
Invention content
The present invention solves the above-mentioned technical problems in the prior art, provides a kind of ECC coagulations of high impact-resistant toughness
Soil and preparation method thereof.
To solve the above problems, technical scheme is as follows：
A kind of ECC concrete of high impact-resistant toughness, each component mass ratio are as follows：Cement:Flyash:Quartz sand:Water:Subtract
Aqua:Fiber=1 PVA:1.48~1.52:0.723~0.727:0.74~0.78:0.024~0.026:0.053~0.055.
Preferably, the PVA fibers are domestic TY-PVA6 fibers and/or daily output II fibers of KU-.
Preferably, the length of the PVA fibers is 6mm, and a diameter of 30~31 μm, Dan Mo Liang≤35GPa, the limit is anti-
La Qiang Du≤1200MPa, elongation at break 3~8%.
Preferably, the cement is marked as 42.5 grades Portland cements.
Preferably, the flyash is commercially available I grade of flyash.
Preferably, 180~220 mesh of grain size of the quartz sand
Preferably, the water-reducing agent is poly carboxylic acid series water reducer, water-reducing rate >=26%.
A kind of preparation method of high impact-resistant ECC concrete, includes the following steps：
Step 1, the quartz sand, flyash and 50% cement dry mixing 1min are sufficiently mixed to siccative, are then added
Whole water carries out wet-mixing 2min, is configured to cement mixed mortar；
Step 2, cycle carries out in four times, and it is in fluidised form that stirring 1.5min, which is added, to mixture in 25% water-reducing agent every time, is added
12.5% cement mixing 1min is sufficiently wetted to all particles；
Step 3, fiber slowly is added along mixing direction and mixes 3min entirely, so that fiber is uniformly dispersed, obtain mixed mortar；
Step 4, mixed mortar made from step 3 is poured into mold, is vibrated, standing demoulds for 24 hours, standard curing 28
It, obtains the ECC concrete units of high impact-resistant toughness.
Compared with the existing technology, advantages of the present invention is as follows,
First, the compression strength of high impact-resistant toughness ECC concrete prepared by the present invention reaches 41.9~46.1MPa, resist
8.5~11.6MPa of intensity is rolled over, toughness reaches 37531.13~48903.57Nm and is significantly larger than the common of the prior art
The compression strength 32.2Mpa of concrete, flexural strength 4.6Mpa, toughness 4172Nm；
Second, the high impact-resistant toughness ECC concrete for preparing of the present invention as a kind of with certain strain-hardening property
Concrete material, itself have relatively high adaptability to changes, be combined with PVA fibers, can further increase compression strength and
Toughness；
Third, the ECC concrete of the present invention, which uses, largely mixes grey match ratio, the ratio of cement and flyash has reached 4:6,
35% of flyash yield no more than reference cement dosage of remote super common concrete proportioning, realizes industrial waste fine coal
The secondary use of ash；
Fourth, mixing daily output PVA fibers and domestic PVA fibers in the ECC concrete of the present invention, the resistance to compression after test doping
The performances such as intensity, flexural strength, toughness can meet the application of the engineering shock resistance building test specimen of varying strength requirement；
Fifth, the concrete of the present invention can realize primary concreting, is conducive to concrete interface combination, improves concrete
Durability.
Specific implementation mode
In embodiment, the domestic PVA fibers use domestic TY-PVA6 fibers, and the daily output PVA fibers are using daily output
II fibers of KU-.
Embodiment 1:
A kind of ECC concrete of high impact properties, is prepared by the component of following mass ratio；Cement:Flyash:Quartz
Sand:Water:Water-reducing agent:PVA fibers (domestic)=1:A:B:C:D:E.
1.48~1.52 D 0.024~0.026 of A
0.723~0.727 E 0.053~0.055 of B
C 0.74~0.78
The length of the vinal be 6mm, a diameter of 30~31 μm, Dan Mo Liang≤35GPa, Ultimate Tensile
Qiang Du≤1200MPa, elongation at break 3~8%；The cement is marked as 42.5 grades Portland cements；Flyash
For commercially available I grade of flyash；180~220 mesh of grain size of the quartz sand；The water-reducing agent is poly carboxylic acid series water reducer, diminishing
Rate >=26%.
The preparation method of the ECC concrete of above-mentioned high impact properties, includes the following steps：
1) by whole sand, flyash and about 50% cement dry mixing 1min, whole water is then added and carries out wet-mixing
2min is configured to cement mortar；
2) it is in fluidised form to recycle in four times and stirring 1.5min is added to mixture in 25% water-reducing agent every time, adds 12.5% cement
Stirring 1min is sufficiently wetted to all particles；
3) fiber slowly is added along mixing direction and mixes 3min entirely, fiber is made to be uniformly dispersed；
4) by cement mortar injection molding vibration moulding, standing demoulds for 24 hours, and standard curing 28 days obtains high impact-resistant toughness
ECC concrete.
Embodiment 2：
It is identical as the preparation method of embodiment 1, the difference is that：The concrete unit test specimen is by following mass ratio
Component is prepared；Cement:Flyash:Quartz sand:Water:Water-reducing agent:PVA fibers (domestic):PVA fibers (daily output)=1:A:B:
C:D:E:F。
1.48~1.52 D 0.024~0.026 of A
0.723~0.727 E 0.032~0.034 of B
0.74~0.78 F 0.020~0.022 of C
Embodiment 3：
It is identical as the preparation method of embodiment 1, the difference is that：The concrete unit test specimen is by following mass ratio
Component is prepared；Cement:Flyash:Quartz sand:Water:Water-reducing agent:PVA fibers (daily output)=1:A:B:C:D:F.
1.48~1.52 D 0.024~0.026 of A
0.723~0.727 F 0.053~0.055 of B
C 0.74~0.78
Comparative example 1：
It is identical as the preparation method of embodiment 1, the difference is that：The concrete unit test specimen is by following mass ratio
Component is prepared；Cement:Flyash:Quartz sand:Water:Water-reducing agent:PVA fibers (daily output)=1:0.11:0.67:0.44:
0.025:0.023
Comparative example 2：
It is identical as the match ratio of embodiment 1, the difference is that, the concrete unit part by making following preparation method
It is standby：
The preparation method includes the following steps：
1) include sand, flyash and cement dry mixing 1min by whole siccatives, whole water is then added and carries out wet-mixing
2min is configured to cement mortar；
2) stirring 1.5min is added to mixture in fluidised form in all water-reducing agents；
3) fiber slowly is added along mixing direction and mixes 3min entirely, fiber is made to be uniformly dispersed；
4) by cement mortar injection molding vibration moulding, standing demoulds for 24 hours, and standard curing 28 days obtains high impact-resistant toughness
ECC concrete.
Embodiment 4：
Compression strength, flexural strength test：According to《Test method for strength of hydraulic cement mortar》(GB 17671-1999) is carried out,
Using the prism test specimen of 40mm*40mm*160mm, standard curing to 28d carries out resistance to compression, flexural strength test.
Shock resistance is tested：Drop weight test is carried out with reference to the method that ACI (ACI) 544 committee is recommended
It measures
Examples 1 to 3 and comparative example 1~2 and normal concrete are tested for the property under the same conditions, as a result such as
Table 1：
Table 1
| Project | Compression strength (Mpa) | Flexural strength (Mpa) | Impact flexibility (Nm) |
| Embodiment 1 | 41.9 | 11.6 | 37531.13 |
| Embodiment 2 | 44.1 | 9.6 | 44420.40 |
| Embodiment 3 | 46.1 | 8.5 | 48903.57 |
| Comparative example 1 | 45.2 | 5.8 | 26693.37 |
| Comparative example 2 | 41.1 | 11.3 | 35803.66 |
| Normal concrete | 32.20 | 4.6 | 4172 |
As seen from the above table, the compression strength of the high impact-resistant toughness ECC concrete of present invention preparation Examples 1 to 3 reaches
41.9~46.1MPa, 8.5~11.6MPa of flexural strength, toughness index reach 37531.13~48903.57Nm.It is much high
In the compression strength 32.2Mpa of existing normal concrete, 30.1%, 36.9%, 43.2% is enhanced respectively；Far above common coagulation
The flexural strength 4.6Mpa of soil, enhances 152.2%, 108.7%, 84.8% respectively；And the impact flexibility of most critical reaches respectively
Arrived normal concrete 8.99 times, 10.65 times, 11.72 times.
Comparative example 1 is coal ash instead reference cement amount 10%, and PVA mass is implemented than the match ratio that volume is 1.01%
The impact flexibility of example 1~3 compares the 26693.37Nm of comparative example 1, has been respectively increased 40.6%, 66.4%, 83.2%.
Comparative example 2 is the match ratio ECC concrete same as Example 1 prepared using customary preparation methods, compression strength
1.91% is reduced, flexural strength reduces 2.59%, and impact flexibility reduces 4.60%.Show to prepare used by the invention
Method enables to fiber to be stirred in cement mortar more uniformly in preparing Concrete, the random distribution of PVA fibers
More preferably, performance is more excellent after concrete formation for state.
In impact process, Examples 1 to 3 shows certain toughness, has good multiple crack growth characteristic, without one
Crack runs through, but destroys crack and gradually carried out around by centre, is in increased radioactivity, embody " split without opening, it is bad and
It is not quick-fried " the characteristics of.
It should be noted that above-described embodiment is only presently preferred embodiments of the present invention, there is no for the purpose of limiting the invention
Protection domain, the equivalent replacement or replacement made on the basis of the above all belong to the scope of protection of the present invention.
Claims (9)
1. a kind of ECC concrete of high impact-resistant toughness, which is characterized in that each mass ratio of ECC concrete components is as follows：Water
Mud:Flyash:Quartz sand:Water:Water-reducing agent:Fiber=1 PVA:1.48~1.52:0.723~0.727:0.74~0.78:
0.024~0.026:0.053~0.055.
2. the ECC concrete of high impact-resistant toughness as described in claim 1, which is characterized in that the PVA fibers are domestic
TY-PVA6 fibers and/or daily output II fibers of KU-.
3. the ECC concrete of high impact-resistant toughness as described in claim 1, which is characterized in that the length of the PVA fibers
For 6mm, a diameter of 30~31 μm, bullet property mould amount≤35GPa, Ultimate Tensile intensity≤1200MPa, elongation at break 3~8%.
4. the ECC concrete of high impact-resistant toughness as described in claim 1, which is characterized in that the cement be marked as
42.5 grade Portland cement.
5. the ECC concrete of high impact-resistant toughness as described in claim 1, which is characterized in that the flyash is commercially available I grade
Flyash.
6. the ECC concrete of high impact-resistant toughness as described in claim 1, which is characterized in that the grain size 180 of the quartz sand
~220 mesh.
7. the ECC concrete of high impact-resistant toughness as described in claim 1, which is characterized in that the water-reducing agent is poly- carboxylic
Sour based water reducer.
8. the ECC concrete of high impact-resistant toughness as described in claim 1, which is characterized in that the diminishing of the water-reducing agent
Rate >=26%.
9. the preparation method of the ECC concrete such as claim 1-8 any one of them high impact-resistant toughness, which is characterized in that
The preparation method comprises the following steps：
Step 1, the quartz sand, flyash and 50% cement dry mixing 1min are sufficiently mixed to siccative, are then added all
Water carry out wet-mixing 2min, be configured to cement mixed mortar；
Step 2, cycle carries out in four times, and it is in fluidised form that stirring 1.5min, which is added, to mixture in 25% water-reducing agent every time, is added
12.5% cement mixing 1min is sufficiently wetted to all particles；
Step 3, fiber slowly is added along mixing direction and mixes 3min entirely, so that fiber is uniformly dispersed, obtain mixed mortar；
Step 4, mixed mortar made from step 3 to be poured into mold, is vibrated, standing demoulds for 24 hours, standard curing 28 days,
Obtain the ECC concrete units of high impact-resistant toughness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810426931.6A CN108569873A (en) | 2018-05-07 | 2018-05-07 | A kind of ECC concrete of high impact-resistant toughness and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810426931.6A CN108569873A (en) | 2018-05-07 | 2018-05-07 | A kind of ECC concrete of high impact-resistant toughness and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108569873A true CN108569873A (en) | 2018-09-25 |
Family
ID=63575715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810426931.6A Pending CN108569873A (en) | 2018-05-07 | 2018-05-07 | A kind of ECC concrete of high impact-resistant toughness and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108569873A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110331819A (en) * | 2019-07-10 | 2019-10-15 | 中国矿业大学 | A kind of high Procedures for Earthquake Resisting Ductile Reinforced Concrete component and preparation method thereof |
| CN110790552A (en) * | 2019-12-10 | 2020-02-14 | 郑州大学 | Waste brick regenerated ultrahigh-toughness mixture and preparation method and application thereof |
| CN112521082A (en) * | 2019-09-19 | 2021-03-19 | 苏州科技大学 | Method for preparing ECC (error correction code) by adopting recycled glass as auxiliary cementing material |
| CN112745085A (en) * | 2021-02-23 | 2021-05-04 | 福州大学 | Sprayable PVA-ECC (polyvinyl acetate-ECC) high-ductility cement-based composite material and preparation method thereof |
| CN113087459A (en) * | 2021-03-15 | 2021-07-09 | 湖北工业大学 | High-ductility cement-based material in ultralow temperature environment, and preparation method and application thereof |
| CN115594456A (en) * | 2022-08-30 | 2023-01-13 | 四川大学（Cn） | Green high-ductility rice hull ash cement-based composite material |
-
2018
- 2018-05-07 CN CN201810426931.6A patent/CN108569873A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110331819A (en) * | 2019-07-10 | 2019-10-15 | 中国矿业大学 | A kind of high Procedures for Earthquake Resisting Ductile Reinforced Concrete component and preparation method thereof |
| CN112521082A (en) * | 2019-09-19 | 2021-03-19 | 苏州科技大学 | Method for preparing ECC (error correction code) by adopting recycled glass as auxiliary cementing material |
| CN110790552A (en) * | 2019-12-10 | 2020-02-14 | 郑州大学 | Waste brick regenerated ultrahigh-toughness mixture and preparation method and application thereof |
| CN110790552B (en) * | 2019-12-10 | 2021-11-09 | 郑州大学 | Waste brick regenerated ultrahigh-toughness mixture and preparation method and application thereof |
| CN112745085A (en) * | 2021-02-23 | 2021-05-04 | 福州大学 | Sprayable PVA-ECC (polyvinyl acetate-ECC) high-ductility cement-based composite material and preparation method thereof |
| CN113087459A (en) * | 2021-03-15 | 2021-07-09 | 湖北工业大学 | High-ductility cement-based material in ultralow temperature environment, and preparation method and application thereof |
| CN115594456A (en) * | 2022-08-30 | 2023-01-13 | 四川大学（Cn） | Green high-ductility rice hull ash cement-based composite material |
| CN115594456B (en) * | 2022-08-30 | 2024-04-02 | 四川大学 | Green high-ductility rice hull ash cement-based composite material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108569873A (en) | A kind of ECC concrete of high impact-resistant toughness and preparation method thereof | |
| CN110105018B (en) | Modified coarse aggregate, fiber nano recycled concrete prepared from modified coarse aggregate and preparation method of fiber nano recycled concrete | |
| CN107285714B (en) | High-ductility polyvinyl alcohol fiber concrete and preparation method thereof | |
| CN103224356B (en) | Green environmentally-friendly powder reinforced concrete water delivery pipe | |
| CN103253918B (en) | Self-repairing anti-shrink cement based composite material | |
| Abdulhadi | A comparative study of basalt and polypropylene fibers reinforced concrete on compressive and tensile behavior | |
| CN110790552B (en) | Waste brick regenerated ultrahigh-toughness mixture and preparation method and application thereof | |
| CN101269935A (en) | Conduit pipe joint sealing perfusion mortar and manufacturing method thereof | |
| CN110498647B (en) | Fiber-reinforced recycled fine aggregate cement-based composite material | |
| CN110981400A (en) | Low-shrinkage steam-curing-free self-compacting C140UHPC and preparation method thereof | |
| CN115893959B (en) | 3D printing desert sand ultra-high ductility concrete and preparation method thereof | |
| CN114634338A (en) | High-ductility cement-based composite material for wind-blown sand in desert and preparation method thereof | |
| CN114605125B (en) | Method for preparing water permeable brick by using construction waste | |
| CN103224359A (en) | Hollow composite powder concrete cover plate | |
| Gradinaru et al. | Investigations on the mechanical properties of concrete with sheep wool fibers and fly ash | |
| CN111253127A (en) | C30 carbon fiber broken brick recycled concrete and preparation method thereof | |
| CN112390589A (en) | Building garbage regeneration interlocking building block and preparation method thereof | |
| CN110105011A (en) | A kind of microlith aggregate concrete with the high ductility of lower shrinkage | |
| CN102910884A (en) | Concrete composition and preparation method thereof | |
| CN114853411B (en) | High-damping full-recycled aggregate concrete ink material for 3D printing and preparation method | |
| CN111362636A (en) | C60 carbon fiber concrete and preparation method thereof | |
| CN110818347A (en) | High-toughness cement-based composite material based on construction waste micro powder and preparation method thereof | |
| CN110304883A (en) | A kind of protofibre cement-base composite material and preparation method thereof | |
| Poon et al. | Properties of cementitious rendering mortar prepared with recycled fine aggregates | |
| CN112521082A (en) | Method for preparing ECC (error correction code) by adopting recycled glass as auxiliary cementing material |
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: 20180925 |
|
| RJ01 | Rejection of invention patent application after publication |