CN110240440B - Method for restoring strength of calcined concrete - Google Patents
Method for restoring strength of calcined concrete Download PDFInfo
- Publication number
- CN110240440B CN110240440B CN201910432815.XA CN201910432815A CN110240440B CN 110240440 B CN110240440 B CN 110240440B CN 201910432815 A CN201910432815 A CN 201910432815A CN 110240440 B CN110240440 B CN 110240440B
- Authority
- CN
- China
- Prior art keywords
- concrete
- coarse aggregate
- water
- strength
- weight
- 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.)
- Active
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
-
- 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
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)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a method for recovering the strength of calcined concrete, and particularly relates to a method for improving the durability of high-strength recycled concrete under high-temperature (up to 800 ℃) and extreme freeze-thaw environment (up to 100 freeze-thaw cycles), which is mainly realized by doping basalt fibers and a later-stage curing method. The basalt fiber is doped into the concrete, so that the freeze-thaw resistance, the permeability resistance and the high-temperature resistance of the concrete are improved, and the environmental damage of the concrete and the crack initiation and expansion under the action of external force can be inhibited. When the fiber mixing amount is 4kg/m3The strength of the recycled concrete is developed fastest and stable, the strength is high in 28 days, the mass loss of the fiber recycled concrete after being frozen and thawed for 100 times is not more than 1%, and the strength of a plain concrete column after being frozen and thawed is high; the underwater maintenance for 24 hours is beneficial to the strength recovery of the fiber recycled concrete after high-temperature loss, and when the high-temperature is lower than 600 ℃, the strength can be recovered to the same level.
Description
Technical Field
The invention belongs to the field of reinforcement treatment of recycled concrete, and particularly relates to a method for restoring strength of calcined concrete.
Background
The regenerated concrete is prepared by crushing, cleaning and grading waste concrete blocks, mixing the crushed, cleaned and graded waste concrete blocks with a grading agent according to a certain proportion, partially or completely replacing natural aggregates (mainly coarse aggregates) such as sand stones and the like, and adding cement, water and the like. The basalt fiber is a continuous fiber which is formed by melting natural basalt ore at 1450-1500 ℃ and drawing the natural basalt ore at a high speed through a platinum-rhodium alloy wire drawing bushing, has various excellent performances of electrical insulation, corrosion resistance, high temperature resistance and the like, can effectively enhance the crack initiation and expansion resistance of concrete, and is listed as one of four major fibers in key development by China.
The prior art discloses that the high temperature resistance and the freeze-thaw resistance can be improved by doping basalt fibers into recycled concrete, but the upper limit value of the high temperature resistance is about 400 degrees, and the medium-low strength concrete is aimed at, and the high-strength basalt fiber recycled concrete is not involved.
Disclosure of Invention
Aiming at the technical problems, the invention aims to provide a method for recovering the strength of calcined concrete, aiming at the building concrete waste block generated by road renovation, the invention prepares high-strength concrete with the compressive strength reaching C60 by measuring the density, crushing index and water absorption of basic recycled coarse aggregate; aiming at the age-period strength development of high-strength recycled concrete, the strength of the recycled concrete can be improved to be above C80 grade by doping basalt fiber, particularly the strength of a test piece with 50 percent of recycled coarse aggregate substitution rate is obviously improved, the optimal basalt fiber doping amount is found, and aiming at the high-strength recycled concrete with the strength of C60 and above, the residual strength of the high-strength recycled concrete can be obviously improved by maintaining and doping fiber after high temperature.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method of restoring strength to a concrete after calcination, comprising the steps of:
1) crushing and screening waste concrete or construction waste, and manually removing waste steel bars, bricks, paper sheets and plastics to obtain recycled coarse aggregate with the particle size of 2.36-19 mm;
2) cleaning the recycled coarse aggregate obtained in the step 1) with water, and soaking in water for 24 hours to 3 days, wherein the optimal soaking time in water is 24 hours, and the water absorption rate of the soaked recycled coarse aggregate is less than or equal to 3.5%;
3) mixing sand, cement and fly ash, stirring, doping basalt fibers in the stirring process to obtain a mixed material I, adding coarse aggregate and water into the mixed material I, wherein the regenerated coarse aggregate in the coarse aggregate accounts for 50% of the total weight of the coarse aggregate, and pouring concrete after fully stirring;
the doping amount of the basalt fibers is 0.5-8kg/m3The doping mode is that the effect is better when the materials can be added for more than three times, and the materials can be added at one time, the stirring time is longer, and the peripheral requirements are concentrated to the center after manual intervention;
the water, cement, fly ash, water reducing agent, sand and coarse aggregate are 5.15-5.77 parts by weight, 13.72-15.4 parts by weight, 3.43-3.85 parts by weight, 0.0515-0.0578 parts by weight, 21.35-22.05 parts by weight of sand and 43.4-44.85.4 parts by weight, wherein the optimal amount is 14.56 parts by weight of cement, 3.64 parts by weight of fly ash, 0.0546 parts by weight of water reducing agent, 21.7 parts by weight of sand and 44.1 parts by weight of coarse aggregate, and the weight of water is that the sum of the weight of cement and the weight of fly ash is 0.3;
the coarse aggregate consists of natural coarse aggregate and recycled coarse aggregate;
4) curing the concrete in the step 3) for the 1 st time under the conditions that the temperature is 17-23 ℃ and the relative humidity is more than 90%, wherein the curing time for the first time is less than or equal to 28 days, then performing high-temperature calcination, curing under water after the calcination is finished, wherein the curing time under water is more than or equal to 24h, the optimal curing time under water is 24h, and water is poured once at intervals of 3-12h during the curing for the first time;
the temperature of the high-temperature calcination is less than or equal to 800 ℃.
Preferably, the basalt fiber doping amount in the step 3) is 4kg/m3Or 5kg/m3When the basalt fiber is mixed in the amount of 4kg/m3Or 5kg/m3The recycled concrete has better compressive strength after freeze-thaw cycle.
Aiming at the building concrete waste blocks generated by road renovation, the invention prepares the high-strength concrete with the compressive strength reaching C60 by measuring the density, crushing index and water absorption of basic recycled coarse aggregates; aiming at the age-period strength development of high-strength recycled concrete, the strength of the recycled concrete can be improved to be above C80 grade by doping basalt fibers, particularly the strength of a test piece with 50 percent of recycled coarse aggregate substitution rate is obviously improved, and the optimal basalt fiber doping amount is found, as shown in figure 2. Aiming at the high-strength recycled concrete with the carbon content of C60 or above, the residual strength of the high-strength recycled concrete can be obviously improved through the maintenance and the fiber doping after high temperature, particularly the fiber dopingThe amount is 5kg/m3When the temperature is high, the residual strength is up to 96% of the original strength after the temperature is high by 400 ℃, the residual strength of the high-strength recycled concrete can reach 91% of the original strength after the temperature is high by 600 ℃, and the residual strength can reach more than 33% of the original strength when the temperature is high by 800 ℃. As shown in fig. 1.
Old mortar is attached to the surface of the regenerated coarse aggregate, and small cracks exist inside the regenerated coarse aggregate. The recycled coarse aggregate is used in the concrete to partially or completely replace the natural coarse aggregate, so that the durability of the concrete is reduced. The basalt fiber chopped strands are doped to inhibit the high-temperature action of concrete and the initiation and expansion capability of internal cracks under freeze-thaw cycles, so that the performance of recycled concrete is improved.
The invention has the beneficial effects that:
when the fiber mixing amount is 4kg/m3The strength of the recycled concrete is developed fastest and stable, and the strength is higher in 28 days. The mass loss of the fiber recycled concrete after 100 times of freeze thawing is not more than 1 percent, and the plain concrete column after freeze thawing has higher strength. And the underwater maintenance for 24 hours is beneficial to the strength recovery of the fiber recycled concrete after high-temperature loss. When the high temperature is less than 600 ℃, the strength can be restored to the same level.
Drawings
FIG. 1 strength of fiber reinforced recycled concrete after high temperature treatment;
FIG. 2 is a cubic compressive strength-freeze-thaw cycle curve, test pieces 10, 20, 30, 22, 24, 25 and 26 are provided, the first numbers 1, 2 and 3 respectively represent the replacement rate of the recycled coarse aggregate 0, 50 and 100%, and the second numbers 0, 2, 4, 5 and 6kg/m of basalt fiber filaments3；The replacement rate of the recycled coarse aggregate refers to the percentage of the recycled coarse aggregate in the total weight of the coarse aggregate;
FIG. 3 shows the residual mass change curves of test pieces 10, 20, 30, 22, 24, 25 and 26 in the freeze-thaw cycle, wherein the first numbers 1, 2 and 3 represent the recycled coarse aggregate substitution rates of 0, 50 and 100 respectively, and the second numbers 0, 2, 4, 5 and 6kg/m of basalt fiber filaments3。
Detailed Description
In order to further illustrate the technical effects of the present invention, the present invention is specifically described below by way of examples.
Example 1
1) Crushing and screening waste concrete or construction waste to obtain recycled coarse aggregate with the particle size of 2.36 mm;
2) cleaning the recycled coarse aggregate obtained in the step 1) with water, and soaking in water for 24 hours;
3) mixing sand, cement and fly ash, stirring, doping basalt fibers in the stirring in batches to obtain a mixed material I, adding coarse aggregate and water into the mixed material I, fully stirring, and pouring concrete;
the doping amount of the basalt fibers is 0.5kg/m3；
The using amounts of the water, the cement, the fly ash, the water reducing agent, the sand and the coarse aggregate are respectively 5.15 parts of water, 13.72 parts of cement, 3.43 parts of fly ash, 0.0515 parts of water reducing agent, 21.35 parts of sand and 43.4 parts of coarse aggregate by weight;
the coarse aggregate consists of natural coarse aggregate and recycled coarse aggregate;
4) and (3) curing the concrete in the step 3) for the 1 st time at the temperature of 17 ℃ and the relative humidity of more than 90%, then calcining at a high temperature, and curing under water for 24 hours after calcining at the temperature of 400 ℃.
Example 2
1) Crushing and screening waste concrete or construction waste to obtain regenerated coarse aggregate with the particle size of 10 mm;
2) washing the recycled coarse aggregate obtained in the step 1) with water, and soaking in water for 48 hours;
3) mixing sand, cement and fly ash, stirring, doping basalt fibers in the stirring in batches to obtain a mixed material I, adding coarse aggregate and water into the mixed material I, fully stirring, and pouring concrete;
the doping amount of the basalt fibers is 4kg/m3；
The using amounts of the water, the cement, the fly ash, the water reducing agent, the sand and the coarse aggregate are respectively 5.4 parts of water, 14.56 parts of cement, 3.64 parts of fly ash, 0.0546 part of water reducing agent, 21.7 parts of sand and 44.1 parts of coarse aggregate by weight;
the coarse aggregate consists of natural coarse aggregate and recycled coarse aggregate;
4) and (3) curing the concrete in the step 3) for the 1 st time under the conditions that the temperature is 20 ℃ and the relative humidity is more than 90%, then calcining at high temperature, and curing under water for 48 hours after calcining, wherein the temperature of the high-temperature calcination is 400 ℃.
Example 3
1) Crushing and screening waste concrete or construction waste to obtain recycled coarse aggregate with the particle size of 19 mm;
2) cleaning the recycled coarse aggregate obtained in the step 1) with water, and soaking in water for 72 hours;
3) mixing sand, cement and fly ash, stirring, doping basalt fibers in the stirring in batches to obtain a mixed material I, adding coarse aggregate and water into the mixed material I, fully stirring, and pouring concrete;
the doping amount of the basalt fibers is 5kg/m3；
The using amounts of the water, the cement, the fly ash, the water reducing agent, the sand and the coarse aggregate are respectively 5.4 parts of water, 14.56 parts of cement, 3.64 parts of fly ash, 0.0546 part of water reducing agent, 21.7 parts of sand and 44.1 parts of coarse aggregate by weight;
the coarse aggregate consists of natural coarse aggregate and recycled coarse aggregate;
4) and (3) curing the concrete in the step 3) for the 1 st time under the conditions that the temperature is 23 ℃ and the relative humidity is more than 90%, then calcining at high temperature, and curing under water for 48 hours after calcining, wherein the temperature of the high-temperature calcination is 800 ℃.
Example 4
1) Crushing and screening waste concrete or construction waste to obtain recycled coarse aggregate with the particle size of 19 mm;
2) cleaning the recycled coarse aggregate obtained in the step 1) with water, and soaking in water for 72 hours;
3) mixing sand, cement and fly ash, stirring, doping basalt fibers in the stirring in batches to obtain a mixed material I, adding coarse aggregate and water into the mixed material I, fully stirring, and pouring concrete;
the doping amount of the basalt fibers is 8kg/m3；
The using amounts of the water, the cement, the fly ash, the water reducing agent, the sand and the coarse aggregate are respectively 5.77 parts by weight of water, 15.4 parts by weight of cement, 3.85 parts by weight of fly ash, 0.0578 parts by weight of water reducing agent, 22.05 parts by weight of sand and 44.8 parts by weight of coarse aggregate;
the coarse aggregate consists of natural coarse aggregate and recycled coarse aggregate;
5) and (3) curing the concrete in the step 3) for the 1 st time under the conditions that the temperature is 23 ℃ and the relative humidity is more than 90%, then calcining at high temperature, and curing under water for 48 hours after calcining, wherein the temperature of the high-temperature calcination is 800 ℃.
The test results and the analysis thereof of the examples 1 to 4 show that the strength of the recycled concrete is still stronger than that of the common concrete after the recycled concrete is mixed with the fiber yarns and subjected to freeze-thaw cycles for 100 times; the compressive strength of the recycled concrete is improved to different degrees after freeze-thaw cycling; when the fiber mixing amount is 4kg/m3The recycled concrete has better compressive strength after freeze-thaw cycle. The highest 96 percent of the common cubic fast strength can be reserved after the underwater maintenance after the damage of the high temperature of 400 ℃, and the doping amount of the basalt fiber is 5kg/m3. 91% of the strength of the untreated test piece was maintained when the heat treatment temperature was 600 ℃. When the treatment temperature is 800 ℃, the strength of the fiber recycled concrete is up to 33 percent of that of an untreated test piece, and is about 19 MPa.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the technical solutions of the present invention are described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the present invention, which should be covered by the protection scope of the present invention.
Claims (9)
1. A method for restoring the strength of concrete after calcination is characterized by comprising the following steps:
1) crushing and screening waste concrete or construction waste to obtain recycled coarse aggregate with the particle size of 2.36-19 mm;
2) washing the recycled coarse aggregate obtained in the step 1) with water, and soaking in water for 3-24 h;
3) mixing sand, cement and fly ash, stirring, doping basalt fiber in the stirring process to obtain a mixed material I, adding coarse aggregate and water into the mixed material I, fully stirring, and pouring concrete;
the doping amount of the basalt fibers is 0.5-8kg/m3；
The using amounts of the water, the cement, the fly ash, the water reducing agent, the sand and the coarse aggregate are respectively 5.15 to 5.77 parts by weight of water, 13.72 to 15.4 parts by weight of cement, 3.43 to 3.85 parts by weight of fly ash, 0.0515 to 0.0578 part by weight of the water reducing agent, 21.35 to 22.05 parts by weight of sand and 43.4 to 44.8 parts by weight of coarse aggregate;
the coarse aggregate comprises natural coarse aggregate and recycled coarse aggregate;
4) curing the concrete in the step 3) for the 1 st time under the conditions that the temperature is 17-23 ℃ and the relative humidity is more than 90%, wherein the curing time for the first time is less than or equal to 28 days, then performing high-temperature calcination, and curing under water after the calcination is finished, wherein the curing time under water is more than or equal to 24 hours;
the temperature of the high-temperature calcination is less than or equal to 800 ℃.
2. The method as claimed in claim 1, wherein the waste concrete or construction waste is crushed in step 1), and then the waste steel bars, bricks, paper sheets and plastics are manually removed.
3. The method according to claim 1, wherein the soaking time in water in step 2) is 24 h.
4. The method as claimed in claim 1 or 3, wherein the recycled coarse aggregate soaked in the step 2) has a water absorption of 3.5% or less.
5. The method as set forth in claim 1, wherein the basalt fiber blending amount in the step 3) is 4kg/m3Or 5kg/m3。
6. The method according to claim 1, wherein the recycled coarse aggregate in step 3) is 50% of the total weight of the coarse aggregate.
7. The method as claimed in claim 1, wherein the weight of water in step 3) is 0.3 relative to the weight of cement and fly ash.
8. The method as claimed in claim 1, wherein the first curing period in the step 4) is that water is poured at intervals of 3-12 h.
9. The method of claim 1, wherein the underwater curing time in step 4) is 24 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910432815.XA CN110240440B (en) | 2019-05-23 | 2019-05-23 | Method for restoring strength of calcined concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910432815.XA CN110240440B (en) | 2019-05-23 | 2019-05-23 | Method for restoring strength of calcined concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110240440A CN110240440A (en) | 2019-09-17 |
| CN110240440B true CN110240440B (en) | 2020-11-06 |
Family
ID=67884886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910432815.XA Active CN110240440B (en) | 2019-05-23 | 2019-05-23 | Method for restoring strength of calcined concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110240440B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110590289A (en) * | 2019-10-14 | 2019-12-20 | 广州珠江黄埔大桥建设有限公司 | Basalt fiber reinforced recycled concrete |
| CN111439977A (en) * | 2020-04-03 | 2020-07-24 | 沈阳理工大学 | Impact-resistant basalt fiber reinforced concrete and preparation method thereof |
| CN111881593B (en) * | 2020-08-05 | 2023-04-25 | 四川大学 | Method for detecting freezing and thawing plasticity of concrete |
| WO2022242862A1 (en) * | 2021-05-20 | 2022-11-24 | Strabag Ag Spezialtiefbau | Fresh concrete |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107010896A (en) * | 2017-04-20 | 2017-08-04 | 福州大学 | A kind of regeneration concrete for filling be chopped basalt fibre and regenerated coarse aggregate |
-
2019
- 2019-05-23 CN CN201910432815.XA patent/CN110240440B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107010896A (en) * | 2017-04-20 | 2017-08-04 | 福州大学 | A kind of regeneration concrete for filling be chopped basalt fibre and regenerated coarse aggregate |
Non-Patent Citations (3)
| Title |
|---|
| 玄武岩纤维再生混凝土的基本力学性能;董江峰等;《四川大学学报（工程科学版）》;20121231;第44卷;第9-12页 * |
| 玄武岩纤维再生混凝土硫酸盐侵蚀后力学性能试验研究;卫志盛等;《混凝土与水泥制品》;20181130(第11期);第59-64页 * |
| 玄武岩纤维增强再生混凝土冻融后基本力学性能试验研究;任磊等;《混凝土》;20170831(第8期);第46-51页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110240440A (en) | 2019-09-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110240440B (en) | Method for restoring strength of calcined concrete | |
| Mohseni et al. | Microstructure and durability properties of cement mortars containing nano-TiO2 and rice husk ash | |
| CN107010896A (en) | A kind of regeneration concrete for filling be chopped basalt fibre and regenerated coarse aggregate | |
| CN109437782A (en) | A kind of manufacture craft of high low-elasticity-modulus assorted fibre seif-citing rate regeneration concrete | |
| CN108328989A (en) | A kind of discarded FRP concrete and preparation method thereof | |
| CN110981351A (en) | Hybrid fiber ultra-high performance concrete UHPC electric pole and manufacturing method thereof | |
| CN109369121A (en) | A kind of manufacture craft of high-elastic modulus fibre seif-citing rate regeneration concrete | |
| CN101381216A (en) | Method for regenerating aggregate concrete from steel fibre rubber granule modified asphalt | |
| CN101880138A (en) | High performance steel-polypropylene hybrid fiber concrete | |
| CN105016670A (en) | Concrete annular pole and preparation method thereof | |
| CN107572969A (en) | Sea sand ultrahigh-performance concrete and preparation method thereof | |
| CN105174836A (en) | Ultra-high strength active powder concrete and preparation method therefor | |
| CN111908867A (en) | Seawater sea sand ultrahigh-performance concrete beam mixed with FRP rib waste rubber | |
| Korniejenko et al. | The overview of mechanical properties of short natural fiber reinforced geopolymer composites | |
| CN114671649A (en) | High-strength concrete prepared from construction waste and preparation method thereof | |
| Revilla-Cuesta et al. | Raw-crushed wind-turbine blade: Waste characterization and suitability for use in concrete production | |
| CN116813280B (en) | Corrosion-resistant high-fracture-resistance recycled aggregate pervious concrete and preparation method thereof | |
| CN111392738B (en) | Method for preparing high-scour-resistance nano-silica concrete by using modified rice hull ash | |
| Al Sayed et al. | Effect of alkali activated limestone-silica fume blended precursor on performance enhancement of recycled aggregate concrete | |
| Scripcă et al. | THE FREEZE-THAW DURABILITY OF CONCRETE WITH FLY ASH, MICROSILICA AND FIBERS. | |
| Badawi et al. | Properties of Recycled Concrete utilizing Waste Rubber | |
| Sivamani et al. | Review on impact of construction waste landfill on environment and its reutilization | |
| CN112851202A (en) | Plant-mixed hot recycled asphalt concrete and preparation method thereof | |
| Suchithra et al. | A review on recent developments in the recycled aggregate concrete | |
| Prayuda et al. | The utilization of Lapindo powder as a material for high strength concrete |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |