CA1072585A - Lightweight concrete material - Google Patents
Lightweight concrete materialInfo
- Publication number
- CA1072585A CA1072585A CA245,820A CA245820A CA1072585A CA 1072585 A CA1072585 A CA 1072585A CA 245820 A CA245820 A CA 245820A CA 1072585 A CA1072585 A CA 1072585A
- Authority
- CA
- Canada
- Prior art keywords
- process according
- weight
- proportion
- detergent
- relatively small
- 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
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
- C04B28/18—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 mixtures of the silica-lime type
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/40—Surface-active agents, dispersants
-
- 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
- C04B2111/40—Porous or lightweight materials
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)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A mixture of Silica Flour, Silica Sand and Hydrated Lime together with Portland Cement or the equivalent is mixed with water and various dry components are added while the lime is slaking. Such dry components may include a detergent for ease of water penetration and a gelling agent to increase the gelling action. The result slurry foams and expands with-in a mould or try at which time it is steam treated by means of an autoclave or the like to cure the resultant procuct which is easily cut, drilled and handled and is lightweight with good structural and insulating and fire-proof properties.
A mixture of Silica Flour, Silica Sand and Hydrated Lime together with Portland Cement or the equivalent is mixed with water and various dry components are added while the lime is slaking. Such dry components may include a detergent for ease of water penetration and a gelling agent to increase the gelling action. The result slurry foams and expands with-in a mould or try at which time it is steam treated by means of an autoclave or the like to cure the resultant procuct which is easily cut, drilled and handled and is lightweight with good structural and insulating and fire-proof properties.
Description
~ BACKGROUND OF THE INVENTION
: .
This invention relates to new and useful improvements in the process of forming a lightweight porous cementitious material which can be poured into moulds and -the like and then cured to form building materials such as blocks, slabs and -the like which is lightweight with good structural properties, good insulating properties, relatively fire-proof and easily cut, drilled and handled.
.~ .
Attempts have been made in the past to produce such ~ 10 materials and cement slabs and the like incorporating a light-; weight aggregate are well known. However, these are relative-ly expensive and heavy and present many difficulties in working or forming same.
:' -~UMMARY OF THE INVENTION
The present invention overcomes these disadvantages by providing a cellular concrete building material which is lightweight yet incorporates good structural properties.
In accordance with the invention there is provided the process for manufacturing a lightweight building material such as lightweight concrete and the like consisting of the steps of combining Silica Sand in a proportion of between 58 1/2% and 52% by weight, Silica Flour in a propor-tion of be-tween 23% and 26% by weight, Hydrated Lime in a proportion of between 12% and 16% by weight, Quick Lime in a proportion of between 3% and 4% by weight, Hydraulic Cement in a proportion of between 2% and 4% by weight, a foaming agent, and a gelling agent comprising a relatively small amount of sugar and Sodium - Silicate, Mixing said raw material mixture with water to form 58~
a slurry, said slurry being poured into moulds, allowing foam-ing to take place and then steam curing the resultant mass at a pressure of between 140 and 200 pounds p.s.i. for a period of between 10 hours and 4 hours depending upon the pressure and then removing the resultant form from the mould.
:, An advantage of the invention is to provide a process which can produce this material by pouring same into moulds and then steam curing same at least to the extent where it can be .,~ .
moved from the moulds, handled and stored under ambient condi-tions for further curing.
.; , Yet another advantage of the invention is to provide a process which is particularly suitable for use in the forma-tion of building panels or blocks.
.
Yet another advantage of the invention is to provide a process in which reinforcing mesh is easily incorporated dur-ing the pouring thereof. Furthermore, any necessary collar or tray extensions are readily incorporated in the form prior to filling same with the mix or slurry.
Still another advantage of the invention is to pro-vide a process in which relatively inexpensive materials can beused yet at the same time providing a finished product which can have an extremely fine finished surface if desired.
:
A still further advantage of the invention is to pro-vide a process which is simp]e in operation and o-therwise well ~ -2-.
,~ ~V'~85 . ~
suited to the purpose for which it is designed.
,, .
With the foregoing in view, and other such advantages . as will become apparent to those skilled in the art to which this invention relates as this specification proceeds, my in-vention consists essentially in the arrangement and construc-tion of parts all as hereinafter more particularly described.
; :
', : ' , .
. . .
~ 5 DETAILED DESCRXPTION
Proceeding therefore to describe the process in detail, it consists basically o~ a mixture of Silica Flour, Silica Sand and Hydrated Lime which is formed into a slurry with approximately an equal weight of water and allowed to mix thoroughly. Calcium Oxide or "Quick Lime" is also added and -the chemical action of the slurry is improved if the tem-perature of same is raised.
' :
A relatively small proportion of Hydraulic Cement such as Alumina Cement or Por-tland Cement is then added and the resultant slurry foams to provide a cellular mass. This cellular mass is then steam treated, as ~or example, by an autoclave, in order to cure the material to the extent that it can be removed from the moulds and stored ~or ~urther curing to take place.
The addition o~ Plaster of Paris and Aluminum Powder is advantageous under certain conditions and I have also ound it advantageous to include a gelling agent to in-crease the gelling of the cells when foaming takes place and which assists in wa-terproofing the finished product.
. .
I have also ~ound it advantageous to add a deter-gent which assists in the thorough mixing of the water with the dry mix and in this respect, X have found a de-tergent .: ~
58~
~` sold by Harrison Cross~ield Company under the trade name ii "Harcoterge".
, ' It is advan-tageous that the Silica Flour be approx-imately 200 mesh and that the Silica Sand be at least 90%
pure or ~ine.
.,~, .
,,' Given below are some examples o~ a mixture, all o~
: which have satis~actgrily ~ormed building bloeks or slabs;
90% fine SiO Elydrated Hot Plaster Aluminum i SiO Sand Flour Lime CA0 Cement o~ Paris Powder ; 10 550 lbs. 25Q lbs. 135 lbs. 40 lbs 40 lbs 20 lbs 1 lb.
For this mix - 150 litres water.
600 lbs 300 lbs 180 lbs. 30 lbs 25 lbs. 10 lbs 1~ lbs For this mix - 175 litres o~ water.
' '~ ' 500 lbs 200 lbs 120 lbs 40 lbs 16 lbs5 lbs 1 lb.
For this mix - 140 li-tres of water.
- _ ':
.,` ' Given below is a table illustrating the preerred upper and lower ranges o~ the various ma-terials, but it will be understood that some o~ the ranges will vary i~ some o~ the ingredients sueh as Plaster o~ Paris or Aluminum Powder are `~ 20 eliminated.
'' , - 4 _ ,, _~
'~
':' ' ' Silica Sand 59 1/2% to 52% by weight Silica Flour 23% to 26% by weight Hydrated Lime Slaked 16% to 12% by weight (Calcium Hydroxide) CaO (Quick Lime) 3% to 4% by weight Cement - Portland or 2% to ~% by weight Alumina or mixture of both Plaster of Paris or 0% to 2% by weight Dolimitic Lime Also, Aluminum Powder in the range of approximately 1 1/2% to 2 1/2% by weight may be added and a small proportion of material such as sulphur, ground glass, sodium hydrochloride, sodium bicarbonate and bleach such as Hydrogen Peroxide, may be ` added as these, in varying amounts, control the density and - 15 the smooth surface at the mould interface.
I have found that an adequate gelling agent is form-ed by a mixture of sugar and Sodium Silicate in relatively small proportions.
.
The sand used may be dune sand or tar sand tailings : 20 which contain up to 2% bituminous or other foreign materials and under these circumstances, I have found it advantageous to mix the sand with some Quick Lime and a relatively small amount of caustic soda to clean the sand grains and assist in the action, before adding the designated amount of Calcium Hydroxide.
When water is added to form the slurry, and while the :: ^
~ 5 hot lime ls slaking, the chemical action is assisted by rais~
; ing the temperature and at this time the detergent and gelling agent can be added.
"
The light Alumina Cement or Portland Cement together with Dolimitic l,ime and some fine Silica Sand can be added at this time in the proportion of four times by weight of the fine Silica Sand to one part by weight of the cement and lime. This permits ease of addition and assimilation of the aluminum de- -pending upon the density and strength requirements. Also dif-ferent grades or particle size of the aluminum and the amounts of the chemicals mentioned will vary the texture of the finish-ed product.
As the mix hegins to foam and become milky, it is poured into trays, bins or moulds which preferably are prepared ` 15 as follows:
.' ; The moulds and the like are coated with a mould re-lease such as that known as "Dow Corning 200"(Trade Mark) and any necessary inserts are added for desired tongue and groove or pat-,' :.~
::
I t)~ r ,:,.',terned purposes. If desired, reinforcing mesh may be suspended one inch ~rom the bottom of the tray or mould and any necessary collars or tray extensions are added. It will also be appre-ciated that for various sizes of blocks, moulds may be provided with removable and expandable partiSions which are also coated with the moulcl release preparation.
The trays and moulds, are ~illed with the milky slurry and are left to foam up -to 50% depending on the amoun-t o~ aeration desired.
The excess foam is -then trimmed of~ and the moulds and trays are loaded into an autoclave. The steam is gradual-ly released into the autoclave preferably taking approximately one hour to attain 150 lbs. p.s.i. pressure and 360F tempera-ture and this is maintained for eigh-t hours.
.,... ~
It has been found that by increasing the pressure to approxima-tely 180 pounds p.s.i., the autoclaving time has been reduced to four hours wi-th better results in hardness.
I have therefore found -that the desired range o~
pressures o~ the autoclave is between 140 and 200 pounds ; 20 p.s.i. and a perio~ of time of between 10 hours ard 4 hours Z~-~S
depending upon the pressure wi-thin the autoclave. The auto-claving action on the Silica Flour and Lime develops a new high crystallirle tobermorite substance which forms -the ~ono Calcium Silicate ~Iydroate Matric bonding the other particles of sand and or other aggregate such as expanded clay and shale pozzolins, which can be incorporated if necessary.
,, .
A~ter autoclaving, the boiler pressura is reduced ` and the autoclave released whereupon the slabs and/or blocks are removed from their forms and palletized. They will con-tinue venting and increasing strength as they dry for a day or so under ambient conditions, but may be transported and used immediately.
The material forms a cellular concrete building material which is lightweight and is provided wi-th constructu-ral properties. It is an excellent insulating material andis fire-proof. It is easily cut, drilled and handled and may be reinforced when used as load bearing walls and for roo~
installations.
'' ~asier installation and cost savings are provided through -time and wait reductions.
~ 5 Since various modiiications can be made in my in-vention as hereinabove described, and many apparently widely diiierent embodimen-ts oi same made within the spirit and scope o~ -the claims without departing ~rom such spirit and scope, it is intended tha-t all matter contained in the accompanying spe-ci~ication shall be interpre-ted as illustra-tive only and not in a limiting sense.
. .
. .
''.'- -,, ~ ., ~':
'': _ g _ ~'"''`'... .
~ '':.' '
: .
This invention relates to new and useful improvements in the process of forming a lightweight porous cementitious material which can be poured into moulds and -the like and then cured to form building materials such as blocks, slabs and -the like which is lightweight with good structural properties, good insulating properties, relatively fire-proof and easily cut, drilled and handled.
.~ .
Attempts have been made in the past to produce such ~ 10 materials and cement slabs and the like incorporating a light-; weight aggregate are well known. However, these are relative-ly expensive and heavy and present many difficulties in working or forming same.
:' -~UMMARY OF THE INVENTION
The present invention overcomes these disadvantages by providing a cellular concrete building material which is lightweight yet incorporates good structural properties.
In accordance with the invention there is provided the process for manufacturing a lightweight building material such as lightweight concrete and the like consisting of the steps of combining Silica Sand in a proportion of between 58 1/2% and 52% by weight, Silica Flour in a propor-tion of be-tween 23% and 26% by weight, Hydrated Lime in a proportion of between 12% and 16% by weight, Quick Lime in a proportion of between 3% and 4% by weight, Hydraulic Cement in a proportion of between 2% and 4% by weight, a foaming agent, and a gelling agent comprising a relatively small amount of sugar and Sodium - Silicate, Mixing said raw material mixture with water to form 58~
a slurry, said slurry being poured into moulds, allowing foam-ing to take place and then steam curing the resultant mass at a pressure of between 140 and 200 pounds p.s.i. for a period of between 10 hours and 4 hours depending upon the pressure and then removing the resultant form from the mould.
:, An advantage of the invention is to provide a process which can produce this material by pouring same into moulds and then steam curing same at least to the extent where it can be .,~ .
moved from the moulds, handled and stored under ambient condi-tions for further curing.
.; , Yet another advantage of the invention is to provide a process which is particularly suitable for use in the forma-tion of building panels or blocks.
.
Yet another advantage of the invention is to provide a process in which reinforcing mesh is easily incorporated dur-ing the pouring thereof. Furthermore, any necessary collar or tray extensions are readily incorporated in the form prior to filling same with the mix or slurry.
Still another advantage of the invention is to pro-vide a process in which relatively inexpensive materials can beused yet at the same time providing a finished product which can have an extremely fine finished surface if desired.
:
A still further advantage of the invention is to pro-vide a process which is simp]e in operation and o-therwise well ~ -2-.
,~ ~V'~85 . ~
suited to the purpose for which it is designed.
,, .
With the foregoing in view, and other such advantages . as will become apparent to those skilled in the art to which this invention relates as this specification proceeds, my in-vention consists essentially in the arrangement and construc-tion of parts all as hereinafter more particularly described.
; :
', : ' , .
. . .
~ 5 DETAILED DESCRXPTION
Proceeding therefore to describe the process in detail, it consists basically o~ a mixture of Silica Flour, Silica Sand and Hydrated Lime which is formed into a slurry with approximately an equal weight of water and allowed to mix thoroughly. Calcium Oxide or "Quick Lime" is also added and -the chemical action of the slurry is improved if the tem-perature of same is raised.
' :
A relatively small proportion of Hydraulic Cement such as Alumina Cement or Por-tland Cement is then added and the resultant slurry foams to provide a cellular mass. This cellular mass is then steam treated, as ~or example, by an autoclave, in order to cure the material to the extent that it can be removed from the moulds and stored ~or ~urther curing to take place.
The addition o~ Plaster of Paris and Aluminum Powder is advantageous under certain conditions and I have also ound it advantageous to include a gelling agent to in-crease the gelling of the cells when foaming takes place and which assists in wa-terproofing the finished product.
. .
I have also ~ound it advantageous to add a deter-gent which assists in the thorough mixing of the water with the dry mix and in this respect, X have found a de-tergent .: ~
58~
~` sold by Harrison Cross~ield Company under the trade name ii "Harcoterge".
, ' It is advan-tageous that the Silica Flour be approx-imately 200 mesh and that the Silica Sand be at least 90%
pure or ~ine.
.,~, .
,,' Given below are some examples o~ a mixture, all o~
: which have satis~actgrily ~ormed building bloeks or slabs;
90% fine SiO Elydrated Hot Plaster Aluminum i SiO Sand Flour Lime CA0 Cement o~ Paris Powder ; 10 550 lbs. 25Q lbs. 135 lbs. 40 lbs 40 lbs 20 lbs 1 lb.
For this mix - 150 litres water.
600 lbs 300 lbs 180 lbs. 30 lbs 25 lbs. 10 lbs 1~ lbs For this mix - 175 litres o~ water.
' '~ ' 500 lbs 200 lbs 120 lbs 40 lbs 16 lbs5 lbs 1 lb.
For this mix - 140 li-tres of water.
- _ ':
.,` ' Given below is a table illustrating the preerred upper and lower ranges o~ the various ma-terials, but it will be understood that some o~ the ranges will vary i~ some o~ the ingredients sueh as Plaster o~ Paris or Aluminum Powder are `~ 20 eliminated.
'' , - 4 _ ,, _~
'~
':' ' ' Silica Sand 59 1/2% to 52% by weight Silica Flour 23% to 26% by weight Hydrated Lime Slaked 16% to 12% by weight (Calcium Hydroxide) CaO (Quick Lime) 3% to 4% by weight Cement - Portland or 2% to ~% by weight Alumina or mixture of both Plaster of Paris or 0% to 2% by weight Dolimitic Lime Also, Aluminum Powder in the range of approximately 1 1/2% to 2 1/2% by weight may be added and a small proportion of material such as sulphur, ground glass, sodium hydrochloride, sodium bicarbonate and bleach such as Hydrogen Peroxide, may be ` added as these, in varying amounts, control the density and - 15 the smooth surface at the mould interface.
I have found that an adequate gelling agent is form-ed by a mixture of sugar and Sodium Silicate in relatively small proportions.
.
The sand used may be dune sand or tar sand tailings : 20 which contain up to 2% bituminous or other foreign materials and under these circumstances, I have found it advantageous to mix the sand with some Quick Lime and a relatively small amount of caustic soda to clean the sand grains and assist in the action, before adding the designated amount of Calcium Hydroxide.
When water is added to form the slurry, and while the :: ^
~ 5 hot lime ls slaking, the chemical action is assisted by rais~
; ing the temperature and at this time the detergent and gelling agent can be added.
"
The light Alumina Cement or Portland Cement together with Dolimitic l,ime and some fine Silica Sand can be added at this time in the proportion of four times by weight of the fine Silica Sand to one part by weight of the cement and lime. This permits ease of addition and assimilation of the aluminum de- -pending upon the density and strength requirements. Also dif-ferent grades or particle size of the aluminum and the amounts of the chemicals mentioned will vary the texture of the finish-ed product.
As the mix hegins to foam and become milky, it is poured into trays, bins or moulds which preferably are prepared ` 15 as follows:
.' ; The moulds and the like are coated with a mould re-lease such as that known as "Dow Corning 200"(Trade Mark) and any necessary inserts are added for desired tongue and groove or pat-,' :.~
::
I t)~ r ,:,.',terned purposes. If desired, reinforcing mesh may be suspended one inch ~rom the bottom of the tray or mould and any necessary collars or tray extensions are added. It will also be appre-ciated that for various sizes of blocks, moulds may be provided with removable and expandable partiSions which are also coated with the moulcl release preparation.
The trays and moulds, are ~illed with the milky slurry and are left to foam up -to 50% depending on the amoun-t o~ aeration desired.
The excess foam is -then trimmed of~ and the moulds and trays are loaded into an autoclave. The steam is gradual-ly released into the autoclave preferably taking approximately one hour to attain 150 lbs. p.s.i. pressure and 360F tempera-ture and this is maintained for eigh-t hours.
.,... ~
It has been found that by increasing the pressure to approxima-tely 180 pounds p.s.i., the autoclaving time has been reduced to four hours wi-th better results in hardness.
I have therefore found -that the desired range o~
pressures o~ the autoclave is between 140 and 200 pounds ; 20 p.s.i. and a perio~ of time of between 10 hours ard 4 hours Z~-~S
depending upon the pressure wi-thin the autoclave. The auto-claving action on the Silica Flour and Lime develops a new high crystallirle tobermorite substance which forms -the ~ono Calcium Silicate ~Iydroate Matric bonding the other particles of sand and or other aggregate such as expanded clay and shale pozzolins, which can be incorporated if necessary.
,, .
A~ter autoclaving, the boiler pressura is reduced ` and the autoclave released whereupon the slabs and/or blocks are removed from their forms and palletized. They will con-tinue venting and increasing strength as they dry for a day or so under ambient conditions, but may be transported and used immediately.
The material forms a cellular concrete building material which is lightweight and is provided wi-th constructu-ral properties. It is an excellent insulating material andis fire-proof. It is easily cut, drilled and handled and may be reinforced when used as load bearing walls and for roo~
installations.
'' ~asier installation and cost savings are provided through -time and wait reductions.
~ 5 Since various modiiications can be made in my in-vention as hereinabove described, and many apparently widely diiierent embodimen-ts oi same made within the spirit and scope o~ -the claims without departing ~rom such spirit and scope, it is intended tha-t all matter contained in the accompanying spe-ci~ication shall be interpre-ted as illustra-tive only and not in a limiting sense.
. .
. .
''.'- -,, ~ ., ~':
'': _ g _ ~'"''`'... .
~ '':.' '
Claims
WHAT I CLAIM AS MY INVENTION IS:
(1) A process for manufacturing a lightweight building material such as lightweight concrete and the like consisting of the steps of combining Silica Sand in a propor-tion of between 58 1/2% and 52% by weight, Silica Flour in a proportion of between 23% and 26% by weight, Hydrated Lime in a proportion of between 12% and 16% by weight, Quick Lime in a proportion of between 3% and 4% by weight, Hydraulic Cement in a proportion of between 2% and 4% by weight, a foaming agent, and a gelling agent comprising a relatively small amount of sugar and Sodium Silicate, mixing said raw material mixture with water to form a slurry, said slurry being poured into moulds, allowing foaming to take place and then steam curing the resultant mass at a pressure of between 140 and 200 pounds p.s.i. for a period of between 10 hours and 4 hours depending upon the pressure and then removing the resultant form from the mould.
(2) The process according to Claim 1 which includes the addition of Plaster of Paris in a proportion of between 0 and 2% by weight.
(3) The process according to Claim 1 in which said Silica Flour is about 200 mesh fineness and the Silica Sand is at least 90% pure.
(4) The process according to Claim 2 in which said Silica Flour is about 200 mesh fineness and the Silica Sand is at least 90% pure.
(5) The process according to Claim 1 which includes the addition of a relatively small amount of detergent.
(6) The process according to Claim 2 which includes the addition of a relatively small amount of detergent.
(7) The process according to Claim 3 which includes the addition of a relatively small amount of detergent.
(8) The process according to Claim 4 which includes the addition of a relatively small amount of detergent.
(9) The process according to Claims 5, 6 or 7 in which the detergent is "Harcoterge" together with a small pro-portion of Hydrogen Peroxide.
(10) The process according to Claim 8 in which the detergent is "Harcoterge" together with a small proportion of Hydrogen Peroxide.
(1) A process for manufacturing a lightweight building material such as lightweight concrete and the like consisting of the steps of combining Silica Sand in a propor-tion of between 58 1/2% and 52% by weight, Silica Flour in a proportion of between 23% and 26% by weight, Hydrated Lime in a proportion of between 12% and 16% by weight, Quick Lime in a proportion of between 3% and 4% by weight, Hydraulic Cement in a proportion of between 2% and 4% by weight, a foaming agent, and a gelling agent comprising a relatively small amount of sugar and Sodium Silicate, mixing said raw material mixture with water to form a slurry, said slurry being poured into moulds, allowing foaming to take place and then steam curing the resultant mass at a pressure of between 140 and 200 pounds p.s.i. for a period of between 10 hours and 4 hours depending upon the pressure and then removing the resultant form from the mould.
(2) The process according to Claim 1 which includes the addition of Plaster of Paris in a proportion of between 0 and 2% by weight.
(3) The process according to Claim 1 in which said Silica Flour is about 200 mesh fineness and the Silica Sand is at least 90% pure.
(4) The process according to Claim 2 in which said Silica Flour is about 200 mesh fineness and the Silica Sand is at least 90% pure.
(5) The process according to Claim 1 which includes the addition of a relatively small amount of detergent.
(6) The process according to Claim 2 which includes the addition of a relatively small amount of detergent.
(7) The process according to Claim 3 which includes the addition of a relatively small amount of detergent.
(8) The process according to Claim 4 which includes the addition of a relatively small amount of detergent.
(9) The process according to Claims 5, 6 or 7 in which the detergent is "Harcoterge" together with a small pro-portion of Hydrogen Peroxide.
(10) The process according to Claim 8 in which the detergent is "Harcoterge" together with a small proportion of Hydrogen Peroxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA245,820A CA1072585A (en) | 1976-02-16 | 1976-02-16 | Lightweight concrete material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA245,820A CA1072585A (en) | 1976-02-16 | 1976-02-16 | Lightweight concrete material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1072585A true CA1072585A (en) | 1980-02-26 |
Family
ID=4105237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA245,820A Expired CA1072585A (en) | 1976-02-16 | 1976-02-16 | Lightweight concrete material |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1072585A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110256031A (en) * | 2019-07-03 | 2019-09-20 | 任俊宇 | A kind of lightweight fireproof insulating GLC decorated articles |
-
1976
- 1976-02-16 CA CA245,820A patent/CA1072585A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110256031A (en) * | 2019-07-03 | 2019-09-20 | 任俊宇 | A kind of lightweight fireproof insulating GLC decorated articles |
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