CA1251227A - Method for making a heat insulating concrete of mortar mix containing aggregates having substantially lower specific gravity - Google Patents
Method for making a heat insulating concrete of mortar mix containing aggregates having substantially lower specific gravityInfo
- Publication number
- CA1251227A CA1251227A CA000404486A CA404486A CA1251227A CA 1251227 A CA1251227 A CA 1251227A CA 000404486 A CA000404486 A CA 000404486A CA 404486 A CA404486 A CA 404486A CA 1251227 A CA1251227 A CA 1251227A
- Authority
- CA
- Canada
- Prior art keywords
- concrete
- specific gravity
- mortar mix
- lower specific
- aggregates
- 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.)
- Expired
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000004567 concrete Substances 0.000 title claims abstract description 17
- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 16
- 230000005484 gravity Effects 0.000 title claims abstract description 11
- 239000004014 plasticizer Substances 0.000 claims abstract description 6
- 239000011148 porous material Substances 0.000 claims abstract description 6
- 238000002360 preparation method Methods 0.000 claims abstract 2
- 239000002245 particle Substances 0.000 claims description 18
- 239000011230 binding agent Substances 0.000 claims description 8
- 239000006260 foam Substances 0.000 claims description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 4
- 239000011707 mineral Substances 0.000 claims description 4
- 229920006327 polystyrene foam Polymers 0.000 claims description 4
- 239000004927 clay Substances 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims 4
- 229920006248 expandable polystyrene Polymers 0.000 claims 1
- 239000002699 waste material Substances 0.000 claims 1
- 239000000654 additive Substances 0.000 abstract description 5
- 230000000996 additive effect Effects 0.000 abstract description 4
- 238000005086 pumping Methods 0.000 abstract description 2
- 238000009825 accumulation Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 101100379067 Caenorhabditis elegans anc-1 gene Proteins 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000007788 liquid 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0051—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof characterised by the pore size, pore shape or kind of porosity
-
- 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
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/08—Macromolecular compounds porous, e.g. expanded polystyrene beads or microballoons
- C04B16/087—Macromolecular compounds porous, e.g. expanded polystyrene beads or microballoons shredded
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Road Paving Structures (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
81.410 METHOD FOR MAKING A HEAT INSULATING CONCRETE
OR MORTAR MIX CONTAINING AGGREGATES HAVING
SUBSTANTIALLY LOWER SPECIFIC GRAVITY
ABSTRACT
The invention relates to a method for making a heat insulating concrete or mortar mix containing aggregates having substantially lower specific gravity than that of concrete or mortar. The additive used according to the invention from the group air pore formers, liquefiers and plasticizers inhibits the upward movement or the accumulation and/or demixing of the light aggregates especially during the preparation, the transport, the pumping operation by means of conventional concrete conveying pumps, the placing and the hardening of the concrete or mortar so that a heat insulating product is provided which has an extremely homogeneous structure.
OR MORTAR MIX CONTAINING AGGREGATES HAVING
SUBSTANTIALLY LOWER SPECIFIC GRAVITY
ABSTRACT
The invention relates to a method for making a heat insulating concrete or mortar mix containing aggregates having substantially lower specific gravity than that of concrete or mortar. The additive used according to the invention from the group air pore formers, liquefiers and plasticizers inhibits the upward movement or the accumulation and/or demixing of the light aggregates especially during the preparation, the transport, the pumping operation by means of conventional concrete conveying pumps, the placing and the hardening of the concrete or mortar so that a heat insulating product is provided which has an extremely homogeneous structure.
Description
1~51'Z~ I
Use is known in the building sector of concrete and mortar mixes containing particles having much lower specific gravity than that of the concrete or mortar mixes in order to reduce the specific gravity of the material and to impart thereto specific, e.g., thermal or acoustic properties. Mixing in these lighter particles, however, provides the desired proper-ties only when the same are distributed uniformly throughout the mix.
Light aggregates are known in this respect whose surfaces are processed such that upon addition of specific additives, a marked cohesion is achieved between the binders and the light aggregates which inhibits an upward movement of the light aggregates during processing.
That known method, however, has the disadvantage that it requires a preceding processing of the light aggregates and therewith excludes the use of conventional light aggregates such as ground material, e.g. recovered polystyrene foam particles.
The object of the invention is to provide a method for making a concrete or mortar mix or the like which contains aggregates having substantially lower specific gravity, a homogeneous structure of the concrete or mortar being achieved without pretreatment of the light aggregates.
In order to achieve this, plasticizers, air pore formers anc1 liquefiers knowr1 per se are added in accordance with the invention to the concrete or mortar mix or the like.
~2S~;~Z~7 81.410 Those materials generally known in the building trade and which liquefy the mixes bring about in accordance with the invention a dlstribution of microscopically small air bubbles in the mix which fill the interspaces between the solid aggregates of the mix by these air bubbles being able to assume a multiplicity of shapes and sizes. These microscop-ically small bubbles are each enveloped in a very thîn binder film. The surface of each small bubble is relatively large because spherical bubbles are seldom concerned. The bubbles bring about a marked cohesion between the particles of the light aggregates and/or between those particles and the other particles of the mix. This extremely high cohesion is to be attributed to the adaptability of the bubbles in respect of their shape to the adjacent surfaces of the solid or liquid components and the binder film surrounding the bubbles.
Apart rom the effect on the cohesion, the liquefying and the flowability resulting therefrom, the distribution of the bubbles has an effect in accordance with the invention on the specific gravity of the mix in such a manner that upward movement of the light aggregates is reduced.
In accordance with the invention, any additive is suitable which brings about a distribution in the mix of microscopically small bubbles enveloped in a film of binder.
The a~ount of additive to be added, based on the total ar~ount of the mineral binders (cement and/or lime), is 0.05 to 0.5~ by wei~ht, especially o.l to 0.2% by weight. The best lZ5~
81.410 results are obtained with an amount of 0.15% by weight of additive.
There can be used as light aqgregates with the method according to the invention all known such aggregates, e.g.
foam particles; especially of polystyrene foam, also particles of used foam which have been obtained by grinding; expanded clay particles or light aggregate particles pretreated at their surfaces.
By virtue of the method according to the invention, a demixing and/or agglomeration of the light aggregates during or after making the mix, the transport, the pumping operation, the placing and the hardeninn operation, t~hereby a finished product having a very homogeneous structure is achieved at any density of the mix.
Use is known in the building sector of concrete and mortar mixes containing particles having much lower specific gravity than that of the concrete or mortar mixes in order to reduce the specific gravity of the material and to impart thereto specific, e.g., thermal or acoustic properties. Mixing in these lighter particles, however, provides the desired proper-ties only when the same are distributed uniformly throughout the mix.
Light aggregates are known in this respect whose surfaces are processed such that upon addition of specific additives, a marked cohesion is achieved between the binders and the light aggregates which inhibits an upward movement of the light aggregates during processing.
That known method, however, has the disadvantage that it requires a preceding processing of the light aggregates and therewith excludes the use of conventional light aggregates such as ground material, e.g. recovered polystyrene foam particles.
The object of the invention is to provide a method for making a concrete or mortar mix or the like which contains aggregates having substantially lower specific gravity, a homogeneous structure of the concrete or mortar being achieved without pretreatment of the light aggregates.
In order to achieve this, plasticizers, air pore formers anc1 liquefiers knowr1 per se are added in accordance with the invention to the concrete or mortar mix or the like.
~2S~;~Z~7 81.410 Those materials generally known in the building trade and which liquefy the mixes bring about in accordance with the invention a dlstribution of microscopically small air bubbles in the mix which fill the interspaces between the solid aggregates of the mix by these air bubbles being able to assume a multiplicity of shapes and sizes. These microscop-ically small bubbles are each enveloped in a very thîn binder film. The surface of each small bubble is relatively large because spherical bubbles are seldom concerned. The bubbles bring about a marked cohesion between the particles of the light aggregates and/or between those particles and the other particles of the mix. This extremely high cohesion is to be attributed to the adaptability of the bubbles in respect of their shape to the adjacent surfaces of the solid or liquid components and the binder film surrounding the bubbles.
Apart rom the effect on the cohesion, the liquefying and the flowability resulting therefrom, the distribution of the bubbles has an effect in accordance with the invention on the specific gravity of the mix in such a manner that upward movement of the light aggregates is reduced.
In accordance with the invention, any additive is suitable which brings about a distribution in the mix of microscopically small bubbles enveloped in a film of binder.
The a~ount of additive to be added, based on the total ar~ount of the mineral binders (cement and/or lime), is 0.05 to 0.5~ by wei~ht, especially o.l to 0.2% by weight. The best lZ5~
81.410 results are obtained with an amount of 0.15% by weight of additive.
There can be used as light aqgregates with the method according to the invention all known such aggregates, e.g.
foam particles; especially of polystyrene foam, also particles of used foam which have been obtained by grinding; expanded clay particles or light aggregate particles pretreated at their surfaces.
By virtue of the method according to the invention, a demixing and/or agglomeration of the light aggregates during or after making the mix, the transport, the pumping operation, the placing and the hardeninn operation, t~hereby a finished product having a very homogeneous structure is achieved at any density of the mix.
Claims (10)
1. Method for making a heat insulating concrete or mortar mix containing aggregates having a lower specific gravity than said concrete or mortar mix; said method being characterized in that during preparation of the heat insu-lating concrete or mortar mix, at least one agent from the group consisting of air pore formers, liquefiers and plasti-cizers is added, whereby air bubbles of differing shape are formed within said concrete or mortar mix.
2. Method according to Claim 1 characterized in that foam particles are used as aggregates having a lower specific gravity.
3. Method according to Claim 2 characterized in that particles of foamed polystyrene are used as foam parti-cles.
4. Method according to Claim 3 characterized in that particles obtained by grinding polystyrene foam are used as foam particles.
5. Method according to Claim 3 characterized in that particles obtained by grinding polystyrene foam waste material are used.
6. Method according to Claim 1 characterized in that expanded clay particles are used as aggregates having a lower specific gravity than said concrete or mortar mix.
7. Method according to Claim 1 characterized in that particles pretreated at their surfaces are used as aggregates having a lower specific gravity than said con-crete or mortar mix.
8. Method according to Claim 1 characterized in that a total of 0.05 to 0.5% by weight of at least one agent from the group consisting of air pore formers, liquefiers and plasticizers, based on the total weight of the mineral binders, is used.
9. Method according to Claim 8 characterized in that 0.1 to 0.2% by weight of at least one agent from the group consisting of air pore formers, liquefiers and plasti-cizers, based on the total weight of the mineral binders, is used.
10. Method according to Claim 9 characterized in that 0.15% by weight of at least one agent from the group consisting of air pore formers, liquefiers and plasticizers, based on the total weight of the mineral binders, is used.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT04823/81A IT1145843B (en) | 1981-06-05 | 1981-06-05 | PROCEDURE FOR OBTAINING CONCRETE AND THERMAL INSULATION MORTAR LIGHTENED WITH POLYSTYRENE, EXPANDED CLAY OR OTHER LIGHT AGGREGATES |
| IT4823/A81 | 1981-06-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1251227A true CA1251227A (en) | 1989-03-14 |
Family
ID=11114379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000404486A Expired CA1251227A (en) | 1981-06-05 | 1982-06-04 | Method for making a heat insulating concrete of mortar mix containing aggregates having substantially lower specific gravity |
Country Status (5)
| Country | Link |
|---|---|
| BR (1) | BR8203278A (en) |
| CA (1) | CA1251227A (en) |
| DE (1) | DE3221207A1 (en) |
| FR (1) | FR2507177A1 (en) |
| IT (1) | IT1145843B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE453181B (en) * | 1983-10-05 | 1988-01-18 | Bengt Hedberg | SET TO MAKE LIGHT BALL CONCRETE |
| DE19645231A1 (en) * | 1996-11-02 | 1998-05-07 | Dennert Poraver Gmbh | Lightweight mortar class LM 21 |
| AU2008226339A1 (en) * | 2007-03-13 | 2008-09-18 | Benex Technologies Pty Ltd | A masonry product and method of manufacture |
| CN108117354A (en) * | 2017-04-25 | 2018-06-05 | 石建团 | A kind of polyphenyl thermal insulation mortar |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1154753B (en) * | 1961-12-19 | 1963-09-19 | Johannes Tacken | Process for the production of porous, ceramic, granular materials |
| DE1211522B (en) * | 1962-10-18 | 1966-02-24 | Johannes Tacken | Process for the production of ceramic, grainy materials from blue clay |
| BE659803A (en) * | 1964-05-18 | |||
| CA921056A (en) * | 1969-02-03 | 1973-02-13 | T. Clark William | Lightweight insulating cellular concrete containing multicellular glass nodules |
| FR2058431A5 (en) * | 1969-09-03 | 1971-05-28 | Sert | Low density refractory/plastics building panels |
| DE2345692B1 (en) * | 1973-09-11 | 1975-03-06 | Wasagchemie Ag | Structural lightweight concrete of particularly low density |
| GB1543562A (en) * | 1975-02-07 | 1979-04-04 | Laing & Son Ltd John | Water-hardenable compositions and their manufacture |
| FR2391177A1 (en) * | 1977-05-18 | 1978-12-15 | Guyon Eugene | Concrete contg. expanded glass beads and fine expanded clay - has low wt., high strength, and good heat and sound insulation |
-
1981
- 1981-06-05 IT IT04823/81A patent/IT1145843B/en active
-
1982
- 1982-06-03 BR BR8203278A patent/BR8203278A/en not_active IP Right Cessation
- 1982-06-04 DE DE19823221207 patent/DE3221207A1/en not_active Ceased
- 1982-06-04 CA CA000404486A patent/CA1251227A/en not_active Expired
- 1982-06-04 FR FR8209788A patent/FR2507177A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| BR8203278A (en) | 1983-05-24 |
| IT1145843B (en) | 1986-11-12 |
| DE3221207A1 (en) | 1983-04-07 |
| IT8104823A0 (en) | 1981-06-05 |
| FR2507177A1 (en) | 1982-12-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |