AU2019203501A1 - Fast hardening, early light loading and surface cracking resistance concrete - Google Patents
Fast hardening, early light loading and surface cracking resistance concrete Download PDFInfo
- Publication number
- AU2019203501A1 AU2019203501A1 AU2019203501A AU2019203501A AU2019203501A1 AU 2019203501 A1 AU2019203501 A1 AU 2019203501A1 AU 2019203501 A AU2019203501 A AU 2019203501A AU 2019203501 A AU2019203501 A AU 2019203501A AU 2019203501 A1 AU2019203501 A1 AU 2019203501A1
- Authority
- AU
- Australia
- Prior art keywords
- concrete
- cement
- strength
- cracking resistance
- sand
- 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.)
- Abandoned
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 54
- 238000005336 cracking Methods 0.000 title claims abstract description 13
- 239000004568 cement Substances 0.000 claims abstract description 11
- 239000004575 stone Substances 0.000 claims abstract description 8
- 239000000654 additive Substances 0.000 claims abstract description 6
- 239000004576 sand Substances 0.000 claims abstract description 6
- 239000000835 fiber Substances 0.000 claims abstract description 4
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims abstract description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 3
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims abstract description 3
- 229910052808 lithium carbonate Inorganic materials 0.000 claims abstract description 3
- 229940005574 sodium gluconate Drugs 0.000 claims abstract description 3
- 235000012207 sodium gluconate Nutrition 0.000 claims abstract description 3
- 239000000176 sodium gluconate Substances 0.000 claims abstract description 3
- 238000005299 abrasion Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 12
- 238000005452 bending Methods 0.000 description 5
- 230000008439 repair process Effects 0.000 description 5
- 239000007787 solid Substances 0.000 description 4
- 238000004078 waterproofing Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000009439 industrial construction Methods 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 239000002969 artificial stone Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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
- C04B28/06—Aluminous 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/06—Quartz; Sand
- C04B14/068—Specific natural sands, e.g. sea -, beach -, dune - or desert sand
-
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/02—Portland cement
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to fast hardening, early light loading and surface cracking
resistance concrete, which is mixed with water to maintain good workability, develop
early strength and high end strength (R-28).
Material composition of concrete according to the invention is as follows:
Item Percent (%)
River Sand 20-25%
Crush Sand 12-16%
Stone 5 x 10 40-50%
Cement OPC 18-22%
High alumina cement 1.5-2%
Fiber 0.01-1%
Powercon 100 0.01-1%
Lithium Carbonate 0.01-1%
Sodium Gluconate 0.01-1%
Esapor 1850-C 0.01-1%
Other additives 0.01-1%
1
Description
Technical Field The invention relates to fast hardening, early light loading and surface cracking resistance concrete, which is mixed with water to maintain good workability, develop early strength and high end strength (R-28).
Background Concrete (derived from the French word "bton") is an artificial stone, formed by mixing ingredients: Light aggregates, fine aggregates, adhesives, etc. with a certain percentage (which is called concrete aggregation). In concrete, adhesives (cement mixed with water, additive etc.) as a linkage of light aggregates (stone, gravel, etc. sometimes using synthetic materials in lightweight concrete) and fine aggregate (usually sand, grit, grindstone, etc.) and when solidified, make all a solid block like stone.
At present, concrete is quite popular material in construction works. There are many different types of concrete. They are classified by weight, adhesive type, structure, technological characteristics and scope of use.
Concrete on the market today often has horizontal cracking, plastic cracking after a period of use for the following reasons: - Concrete is mixed with too much water. - Expansion joint is not effective. - The concrete pouring distance is too large, leading to a long hardening time, from several weeks to several months. - Cold weather, concrete surface lacks proper air void system, low-quality raw aggregate. - The durability of concrete is not high due to the design and operation process, climatic conditions, environment related to the structure.
- Cracks can often be seen when bending stress is greater than that of concrete.
Concrete on the market has a hardening process as following:
• Casting stage takes from 1.5 to 3 hours for conventional concrete and 3-4 hours for concrete with slow curing additives. • Curing and hardening stage is from 18-24 hours after the beginning of curing. • Developing intensity of concrete structure stage.
Summary
The present invention relates to fast hardening, early light loading and surface cracking resistance concrete, which is mixed and packed in accordance with standards, which is usable only by adding water, easy for use or repair in civil construction, in a small or medium area and it is considered as a do-it-yourself product.
The concrete according to the invention has high flexibility in construction, maintains its construction and repair capacity within 1 hour. Users can do in a large area without separating the layer as well as creating a connection layer. The concrete develops strength rapidly and it is able to withstand light loads after 4 hours, a person can walk on the surface. This saves a lot of construction time and improves economic efficiency. It is unnecessary to wait 24 hours for using as available concretes in the market.
High end strength R28 reaches resistance grade above 50MPa, has the good compacting capacity, leading to high waterproofing, the product is suitable for many civil and industrial construction applications.
After developing the strength of concrete, there is no cracking surface, with higher stretch, bending capacity than conventional concrete, bringing economic value and safety for solid structures.
Detailed Description The present invention relates to fast hardening, early light loading and surface cracking resistance concrete, which is mixed and packed in accordance with standards, which is usable only by adding water, easy for use or repair in civil construction, in a small or medium area and it is considered as a do-it-yourself product.
The material composition of concrete according to the invention is as follows:
Item Percent (%)
River Sand 20-25%
Crush Sand 12-16%
Stone 5 x 10 mm 40-50%
Cement OPC 18-22%
High Alumina Cement 1.5-2%
Fiber 0.01-1%
Powercon 100 0.01-1%
Lithium Carbonate 0.01-1%
Sodium Gluconate 0.01-1%
Esapor 1850-C 0.01-1%
Other additives 0.01-1%
The concrete according to the invention has high flexibility in construction, maintains its construction and repair capacity within 1 hour. Users can do in a large area without separating the layer as well as creating a connection layer. The concrete develops strength rapidly and it is able to withstand light loads after 4 hours, a person can walk on the surface. This saves a lot of construction time and improves economic efficiency. It is unnecessary to wait 24 hours for using as available concretes in the market. High end strength R28 reaches resistance grade above 50MPa, has a good compacting capacity, leading to high waterproofing, the product is suitable for many civil and industrial construction applications. Said early and end strength, according to ASTM C-349 standard, is R21 and R28 strength. Under civil concrete, R21 and R28 strength have resistance grade of MPa and 25MPa respectively. The higher the concrete resistance, the more compact capacity. This means that concrete has few tiny hollow pores that prevent water from passing through the concrete. This is called the waterproofing mechanism by the consistency of concrete blocks. After developing the strength of concrete, there is no cracking surface, with higher stretch, bending capacity than conventional concrete, bringing economic value and safety for solid structures. In order to obtain the optimal performance according to the present invention, concrete is formed based on the selected materials, in details: - Sand and crushed stone, stones are selected in size so that the products can obtain the optimal properties mentioned above, with light foamed, high flexibility of concrete. - Cement used in concrete is Portland OPC cement with good properties of high strength and abrasion resistance. - The additive used has super plasticizing properties, has fibers to increase the resistance to cracking and has substances that promote the development of early strength without affecting the construction time of the product.
Effectiveness of the invention The concrete according to the invention has high flexibility in construction, maintains its construction and repair capacity within 1 hour. Users can do in a large area without separating the layer as well as creating a connection layer. The concrete develops strength rapidly and it is able to withstand light loads after 4 hours, a person can walk on the surface.
High end strength R28 reaches resistance grade above 50MPa, has a good compacting capacity, leading to high waterproofing, the product is suitable for many civil and industrial construction applications.
Besides, after developing the strength of concrete, there is no cracking surface, with higher stretch, bending capacity than conventional concrete, bringing economic value and safety for solid structures.
Concrete according to the invention have advantages in compare with common types of concrete as follows:
Content Concrete according to the Other concrete invention
Hardening time 4 hours 18 - 24 hours
End strength (R28) > 50MPa 25MPa
Bending strength 6.8MPa 3.99MPa
Water/Concrete rate 0.51% 0.67%
2019203501
There is one page of the claims only.
Claims (3)
- Claims 1. Fast hardening, early light loading and surface cracking resistance concrete, comprises:Item Percent(%)River Sand 20-25%Crush Sand 12-16%Stone 5 x 10 40-50%Cement OPC 18-22%High alumina cement 1.5-2%Fiber 0.01-1%Powercon 100 0.01-1%Lithium Carbonate 0.01-1%Sodium Gluconate 0.01-1%Esapor 1850-C 0.01-1%Other additives 0.01-1%
- 2. Concrete of claim 1, wherein sand and crushed stone are selected in size so that the products can obtain the optimal properties mentioned above with high end strength (> 50MPa).
- 3. Concrete of claim 1, wherein cement is Portland OPC cement with good properties of high strenth and abrasion resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2019203501A AU2019203501A1 (en) | 2019-05-18 | 2019-05-18 | Fast hardening, early light loading and surface cracking resistance concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2019203501A AU2019203501A1 (en) | 2019-05-18 | 2019-05-18 | Fast hardening, early light loading and surface cracking resistance concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2019203501A1 true AU2019203501A1 (en) | 2020-12-03 |
Family
ID=73551656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2019203501A Abandoned AU2019203501A1 (en) | 2019-05-18 | 2019-05-18 | Fast hardening, early light loading and surface cracking resistance concrete |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2019203501A1 (en) |
-
2019
- 2019-05-18 AU AU2019203501A patent/AU2019203501A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK4 | Application lapsed section 142(2)(d) - no continuation fee paid for the application |