AU2019203500A1 - Lightweight concrete - Google Patents
Lightweight concrete Download PDFInfo
- Publication number
- AU2019203500A1 AU2019203500A1 AU2019203500A AU2019203500A AU2019203500A1 AU 2019203500 A1 AU2019203500 A1 AU 2019203500A1 AU 2019203500 A AU2019203500 A AU 2019203500A AU 2019203500 A AU2019203500 A AU 2019203500A AU 2019203500 A1 AU2019203500 A1 AU 2019203500A1
- Authority
- AU
- Australia
- Prior art keywords
- concrete
- lightweight concrete
- light
- stone
- concrete according
- 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
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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
-
- 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
- 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
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/14—Minerals of vulcanic origin
- C04B14/16—Minerals of vulcanic origin porous, e.g. pumice
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
- C04B18/125—Slate residues, e.g. colliery shale or oil shale or oil shale ash
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Abstract
Lightweight concrete comprises following components:
river sand 20-50%
light stone 25-40%
cement 15-25%
additives 0-7%
Light dry concrete according to the invention is 30% lighter than conventional
concrete and has developed early strength. Hardening capacity is achieved after 8
hours of completion of construction. It also has high end strength (>40MPA), so the
resistance to compressive and bending forces is higher than conventional lightweight
concrete. In addition, it has waterproofing capacity, heat and sound insulation. Light
dry concrete according to the invention can be lighter, so it can carry more and reduce
transportation costs, reduce foundation costs, energy costs for cooling or heating
construction.
Description
Technical Field The invention relates to lightweight concrete, mixed with water to maintain good construction, to develop early strength and high end strength (R-28), with good waterproofing capacity.
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, additives, 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.
Lightweight concrete in use on the market has the following characteristics: - Structured foamed concrete is made up of a concrete block with countless tiny air holes. These holes are connected together by concrete so the concrete block can float on the water, which is seen as an empty concrete block. Because of the hollow structure, its weight is very light (it can reach 350 kg/m3 by weight, while conventional aggregate concrete weighs 2800 kg/m3 by weight, with the density of water is 1000 kg/m3). - Structured autoclaved aerated concrete with numerous tiny air holes creates hollow concrete block so it is also light, from 400kg/m3 to 800kg/m. One drawback of this autoclaved aerated concrete is its remarkable water absorption capacity. Therefore, when used as light bricks, it is often used for special mortar for light bricks including binders, plasters with higher intensity and better hydration. - Both of the above lightweight concrete products, when falling into the water, are able to float on the water easily because of their lightweight, which are even lighter than water. Other concrete products cannot be floated. That is why it is called lightweight concrete.
Drawbacks of ultra lightweight concrete include: - Difficulty in manufacturing: As we know, ultra lightweight concrete is a material produced by the technology of semi-assembled stressed concrete. With technology and different types of specific materials, not all manufacturers can produce this type of concrete. - Technical requirements: the construction worker must be experienced with high professional qualifications. This is because the construction method for ultra lightweight concrete is completely different from traditional concrete construction. Therefore, if the construction unit does not master the technique, the quality of concrete is not guaranteed, and therefore the quality of the construction will also be seriously affected. - Requires use of careful, thorough, meticulous waterproof treatments than that of conventional concrete because there has the appearance of joints in ultra lightweight concrete. - Due to the hollow structure, the impact of noise in ultra lightweight concrete is also higher than conventional concrete. - Horizontally low bearing capacity: This type of lightweight concrete brick has a limited point of capacity to withstand horizontal forces, which is weaker than traditional bricks. Therefore, the construction process needs to have a specific structure. Therefore, using lightweight concrete bricks is not flexible in architectural design with many angles. - Poor waterproofing capacity: Another drawback of lightweight concrete bricks is that this product has higher moisture absorption capacity than conventional bricks, which leads to poor waterproofing capacity. Thus, it is not suitable to use this material in areas exposed to water. Simultaneously, when mounting the objects on the wall made of lightweight concrete bricks, it is necessary to use big or specialized expansive screws.
Summary The purpose of the present invention is to provide lightweight concrete mixed with aggregate with new characteristics that solve the disadvantages of present conventional concrete.
The light dry concrete according to the invention does not follow the direction of emptying concrete block porosity as two conventional lightweight concrete on the market that uses river sand and light stone materials. River sand and light stone are formed by volume expansion during the firing of stone at a temperature of 1200°C to make light aggregates. The density of these types of sand and stone is between 550 700kg/m. This means reducing the mass of concrete but the mechanical and physical properties of concrete are unchanged compared to conventional concrete.
The light dry concrete according to the invention has light porous construction with homogeneous block and can be pumped under high pressure without stratification of aggregate as conventional lightweight concrete. The light dry concrete according to the invention is mixed and pre-packed, and add water easily when using.
Light dry concrete according to the invention is 30% lighter than conventional concrete and has developed early strength. Hardening capacity is achieved after 8 hours of completion of construction. It also has high end strength (>40MPA), so resistance to compressive and bending forces is higher than conventional lightweight concrete.
- Lightweight dry concrete according to the invention is used with light aggregate derived from stone, so it has high consistency, waterproofing capacity, heat and sound insulation. Light aggregates can be one of the following materials:
+ Natural materials, like volcanic rock.
+ Heat treatment of natural materials such as clay, slate or shale, i.e. Leca.
+ Produced from industrial by-products such as fly ash, i.e. Lytag.
+ Processing industrial by-products such as expanded sheets, i.e. Pellite.
Detailed Description The light dry concrete according to the invention has light porous construction with homogeneous block and can be pumped under high pressure without stratification of aggregate as conventional lightweight concrete. The light dry concrete according to the invention is mixed and pre-packed, and add water easily when using.
The light dry concrete according to the invention does not follow the direction of emptying concrete block porosity as two conventional lightweight concrete on the market that uses river sand and light stone materials.
The composition of concrete according to the invention is as follows:
River sand (Sand module >2.0) 20-50%
Light stone 25-40%
Cement 15-25%
Additives 0-7%
Light aggregate materials, including river sand and light stone mentioned above, can be one of the following materials:
+ Natural materials, like volcanic rock.
+ Heat treatment of natural materials such as clay, slate or shale, i.e. Leca.
+ Produced from industrial by-products such as fly ash, i.e. Lytag.
+ Processing industrial by-products such as expanded sheets, i.e. Pellite.
+ River sand is selected from sand component with sand module > 2.0.
River sand and light stone are formed by volume expansion during the firing of stone at a temperature of 1200°C to make light aggregates. The density of these types of sand and stone is between 550 - 700kg/m. This means reducing the mass of concrete but the mechanical and physical properties of concrete are unchanged compared to conventional concrete.
Cement used in concrete is Portland OPC cement with good properties of high strength and abrasion resistance.
Used additivess may be adhesives, water reducers, water repellents, hydrophobic agents, substances with super plasticization properties, substances that promote early strength development without affecting the construction time of the product, and combination thereof.
Effectiveness of the invention Light dry concrete according to the invention is 30% lighter than conventional concrete and has developed early strength. Hardening capacity is achieved after 8 hours of completion of construction. It also has high end strength (>40MPA), so resistance to compressive and bending forces is higher than conventional lightweight concrete.
Lightweight dry concrete according to the invention is used with light aggregate derived from stone, so it has high consistency, waterproofing capacity, heat and sound insulation.
Lightweight dry concrete according to the invention can carry more weight and reduce transportation costs.
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.
Reducing foundation costs which account for 30-50% of the construction cost: Using lightweight concrete for casting floors or roofs for high-rise buildings reduces the weight of loading on the foundation, thereby reducing the design for foundation.
Reducing the cost of cooling energy or heating the building: Lightweight concrete produced by keramzit-bemes stone aggregate have porosity in the aggregate so that the heat is not passed through in case of heating or cooling. Accordingly, expenses for adjusting temperature will be greatly reduced, which result in energy saving.
Lightweight dry concrete according to the invention has lighter volume so it can carry more weight and reduce transportation costs.
Concrete product according to the invention has advantages over other conventional lightweight concrete types as follows:
Content Lightweight concrete Other concrete
Compressive strength >40MPa ~ 05 - 25 MPa
Flexural strength >7.3 MPa <2 MPa
Water absorption <7% >20
% Weight 1600kg 2100 kg
Claims (5)
- Claims: 1. Lightweight concrete comprises the following components:
- river sand 20-50% light stone 25-40% cement 15-25% additives 0-7% 2. Lightweight concrete according to claim 1, wherein river sand and light stone are formed by volume expansion during the firing of stone at a temperature of 1200°C to make light aggregates.
- 3. Lightweight concrete according to claim 2, wherein light aggregate material may be one of the following materials:natural materials, like volcanic rock.heat treatment of natural materials such as clay, slate or shale, i.e. Leca.produced from industrial by-products such as fly ash, i.e. Lytag.processing industrial by-products such as expanded sheets, i.e. Pellite.
- 4. Lightweight concrete according to claim 1, wherein the cement used in the product is OPC portland cement with good properties of high abrasion resistance and strength.
- 5. Lightweight concrete according to claim 1, wherein the Used additivess may be adhesives, water reducers, water repellents, hydrophobic agents, substances with super plasticization properties, substances that promote early strength development without affecting the construction time of the product, and combination thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2019203500A AU2019203500A1 (en) | 2019-05-18 | 2019-05-18 | Lightweight concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2019203500A AU2019203500A1 (en) | 2019-05-18 | 2019-05-18 | Lightweight concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2019203500A1 true AU2019203500A1 (en) | 2020-12-03 |
Family
ID=73551655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2019203500A Abandoned AU2019203500A1 (en) | 2019-05-18 | 2019-05-18 | Lightweight concrete |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2019203500A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120192142A (en) * | 2025-05-26 | 2025-06-24 | 港理大(杭州)技术创新研究院有限公司 | Foamed concrete and preparation method thereof for rail transit sound-absorbing low wall |
-
2019
- 2019-05-18 AU AU2019203500A patent/AU2019203500A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120192142A (en) * | 2025-05-26 | 2025-06-24 | 港理大(杭州)技术创新研究院有限公司 | Foamed concrete and preparation method thereof for rail transit sound-absorbing low wall |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK4 | Application lapsed section 142(2)(d) - no continuation fee paid for the application |