CN102503284A - Foam concrete - Google Patents
Foam concrete Download PDFInfo
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- CN102503284A CN102503284A CN2011103543218A CN201110354321A CN102503284A CN 102503284 A CN102503284 A CN 102503284A CN 2011103543218 A CN2011103543218 A CN 2011103543218A CN 201110354321 A CN201110354321 A CN 201110354321A CN 102503284 A CN102503284 A CN 102503284A
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Abstract
Foam concrete is produced by mixing the following raw materials in parts by weight: 200-300 parts of cement, 250-850 parts of fine sand, 20-40 parts of foaming agent and 10-20 parts of compensating agent. The foam concrete has the advantages that: the foam concrete is light in weight and attractive in appearance; closed holes exist in the foam concrete, so that the volume weight of the foam concrete is 500-1200 kg/m3; the foam concrete is cast in site and integrally formed and is light in weight and high in hardness; the foam concrete is closely connected with a base course, so that the bearing capability of a heat insulating layer is greatly improved; and the original raised heat insulating layer is changed into an attractive, flat and practical garden, or an entertainment place or the like, so that the using space of a building is increased.
Description
Technical field
The invention belongs to the building trade technical field, relate in particular to a kind of foamed concrete.
Background technology
Account for 25% of China's total energy in China building consumes energy, compared with developed countries, the architectural energy consumption of China is 3～4 times of developed country, and wherein the roofing power consumption is 2.5～5.5 times of developed country.Foamed concrete material is because of itself having countless small independences, uniform distribution, the air hole structure of sealing, and high-strength light, heat-insulation and heat-preservation, waterproof fireproofing, functions such as antidetonation, application and popularization in each item engineering more and more widely.
Because the porosity in the foamed concrete is generally up to %50～more than 70%, the intensity of coagulating soil is significantly less than Strength of Common.Foamed concrete is not that quality is more gently good more, and the quality light blading foam concrete intensity end more just more in general is if undue pursuit lightweight can reduce foamed concrete intensity.
The preparation of foamed concrete is with to mix the system normal concrete different, the process that its exists a foam to import.In order in this process, evenly to be incorporated in the cement slurry foam and the intact foamed concrete system that is distributed in equably better, require cement slurry to have good flowability.To accelerate concrete strength, wc is to guarantee that sand-cement slurry has the prerequisite of good fluidity.
If maintenance in time after the foamed concrete construction finishes is moisture evaporation.Particularly at the hardened commitment, the structure of foamed concrete is also relatively weaker, if maintenance is not good at, moisture very easily loses, and causes bigger contraction and surface cracking, weakens the sclerotium internal structure, causes hardened foam concrete high-hydroscopicity.So the precuring system is most important to the intensity performance and the final strength of foamed concrete.
Summary of the invention
Ended questions to be solved by this invention provides a kind of high-intensity foamed concrete.
Adopt following technical scheme in order to solve the problems of the technologies described above: a kind of foamed concrete has following raw material to mix according to weight part: 200 ~ 300 parts of cement, 250 ~ 850 parts of fine sands, 20 ~ 40 parts of whipping agents, 10 ~ 20 parts of shims.
Can also add filler and/or aggregate.
A kind of foamed concrete is mixed according to weight part by following raw material: 300 parts of cement, 840 parts of fine sands, 20 parts of whipping agents, 10 parts of shims.
A kind of foamed concrete is mixed according to weight part by following raw material: 300 parts of cement, 460 parts of fine sands, 30 parts of whipping agents, 10 parts of shims.
Can also add 20 parts of triethanolamines.
A kind of foamed concrete is mixed according to weight part by following raw material: 200 parts of cement, 250 parts of fine sands, 40 parts of whipping agents, 10 parts of shims.
Described cement is above ordinary Portland cement, Portland blast or pulverized fuel ash cement of p.o42.5; Described shim is CaO-AL
2O
2-CaSO
3
The present invention has the following advantages: lightweight, attractive in appearance.Owing to have a large amount of storage pores in the foamed concrete; Making its unit weight is 500～1200kg/m3; Foamed concrete be on-site pouring pound, global formation, light weight body hard, closely link to each other with basic unit; Improve the weight capacity of thermofin greatly, can original overhead heat insulation roofing have been become attractive in appearance, smooth and practical gardens or entertainment place etc., enlarged the usage space of buildings.
Heat-insulation and heat-preservation, reinforcement waterproof effect.The thermal conductivity of foamed concrete is lower than 0.12Wmk, has only normal concrete 1/10th.Foamed concrete is made up of countless small independent evenly-distributed air holes; Three kinds of approach that cut off conduction, convection current, radiation heat conduction effectively; The heat conductivility that reduces greatly, thereby have good heat insulation and preservation effect, block the indoor and outdoor energy exchange effectively; Thereby the raising cooling or heating effect is kept the stability of room temp.Foamed concrete and waterproof layer are close to one; Both can prevent effectively that crack seepage phenomenon from appearring in the distortion that causes roof construction layer because of expanding with heat and contract with cold; Can protect the aged deterioration of water-proof material again effectively, the foamed concrete water-intake rate is lower, possesses certain waterproof ability; Therefore foamed concrete can also prolong the life-span of waterproof layer and strengthen waterproof effect in the protection roofing.
It is simple and direct, cheap to construct.The foam coagulation has excellent flowing property, can be directly stirs in that roofing is on-the-spot, and pumpability is good in the foamed concrete construction process, also can centralized production, irritate the car transportation with commerical ready-mixed concrete.Need not any vibrating during the foamed concrete cast, saving of labor, the simple and fast that saves time, constructs, and also cheap.
The foamed concrete roof heat insulation is looked for the slope, flexible design, and easy construction, waterproof is water-fast, and is with low cost, can carry out the multi-layer combined type structure, possesses good heat insulation and heat insulation function.Roof structure and construction technology have not only been simplified; And the roofing thermal property is good; Have very high economic benefit, huge market development space and good social effect; Be applicable to China's wide geographic area, be China's roofing energy conservation further normalization development from now on, China's building is developed along the direction of environmental protection and energy saving created favourable condition.
Embodiment
Embodiment 1: a kind of foamed concrete has following raw material to mix according to weight part: 200 ~ 300 parts of cement, 250 ~ 850 parts of fine sands, 20 ~ 40 parts of whipping agents, 10 ~ 20 parts of shims.Can also add filler and/or aggregate.
Described cement is above ordinary Portland cement, Portland blast or pulverized fuel ash cement of p.o42.5; Described shim is CaO-AL
2O
2-CaSO
3
Before mixing system foamed concrete, in the foaming bottle, add about 2kg alkali formula whipping agent, then in topped up with water, the inflation pressurization.In pressure process, the tensimeter pressure-controlling is in 0.6～0.8MPa scope, when pressure quits work greater than the 0.8MPa air compressor machine, when pressure is opened less than the 0.6MPa air compressor machine automatically according to actual needs.When pressure reached 0.8MPa for the first time, foaming agent mixed with water mixed solution.
The mortar mixer that engineering is used is 0.4m
3, in stirrer, add 50kg water (water-containing rate is lower than 5%) and add durafiber then and (press 0.7kg/m
3Batching) stirs 1～2min, add 425# cement 125kg, the about 190kg of fine sand and admixture again, stir 2 ~ 3min; After waiting to be stirred into thick shape dope; With the foam that foaming agent in the foaming bottle and water mixed solution form under the effect of pressure through filtering net, continue to stir in the cement admixture in the adding whisking appliance, pressure reduces air compressor machine and works on and make pressure be controlled at 0.6～0.8MPa at this moment; When the foamed concrete slump increases to 200-220mm (mortar mixer capacity 80%); Stop to add foam, continue to stir foamed concrete, approximately stir after 5～6min with the liquid material of finished product put the stream base bang.
Foam materials uses continued reinforced (general 2 foaming bottles use in turn, and in use another has added foam materials) in the foaming bottle, closes air compressor machine; Continue to connect another bottle that foams, before reinforced, give the bottle venting of foaming earlier, because present air pressure is in 0.6～0.8 scope in the foaming bottle; Open valve and exit, when the bottle internal gas pressure is identical with ambient pressure, add foaming agent and water; When material adds, repeat above work.
Embodiment 2: a kind of foamed concrete is mixed according to weight part by following raw material: 300 parts of ordinary Portland cements, 840 parts of fine sands, 20 parts of whipping agents, CaO-AL
2O
2-CaSO
310 parts.Other are with embodiment 1.
Embodiment 3: a kind of foamed concrete is mixed according to weight part by following raw material: 300 parts of Portland blasts, 460 parts of fine sands, 30 parts of whipping agents, 10 parts of shims, 20 parts of triethanolamines.Other are with embodiment 1.
Embodiment 4: a kind of foamed concrete is mixed according to weight part by following raw material: 200 parts of pulverized fuel ash cements, 250 parts of fine sands, 40 parts of whipping agents, 10 parts of shims.Other are with embodiment 1.
Claims (7)
1. a foamed concrete is characterized in that having following raw material to mix according to weight part: 200 ~ 300 parts of cement, 250 ~ 850 parts of fine sands, 20 ~ 40 parts of whipping agents, 10 ~ 20 parts of shims.
2. foamed concrete according to claim 1 is characterized in that: can also add filler and/or aggregate.
3. foamed concrete according to claim 1 is characterized in that being mixed according to weight part by following raw material: 300 parts of cement, 840 parts of fine sands, 20 parts of whipping agents, 10 parts of shims.
4. foamed concrete according to claim 1 is characterized in that being mixed according to weight part by following raw material: 300 parts of cement, 460 parts of fine sands, 30 parts of whipping agents, 10 parts of shims.
5. foamed concrete according to claim 4 is characterized in that: can also add 20 parts of triethanolamines.
6. foamed concrete according to claim 1 is characterized in that being mixed according to weight part by following raw material: 200 parts of cement, 250 parts of fine sands, 40 parts of whipping agents, 10 parts of shims.
7. according to any described foamed concrete in the claim 1 ~ 6, it is characterized in that: described cement is above ordinary Portland cement, Portland blast or pulverized fuel ash cement of p.o42.5; Described shim is CaO-AL
2O
2-CaSO
3
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110354321 CN102503284B (en) | 2011-11-10 | 2011-11-10 | Foam concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110354321 CN102503284B (en) | 2011-11-10 | 2011-11-10 | Foam concrete |
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| Publication Number | Publication Date |
|---|---|
| CN102503284A true CN102503284A (en) | 2012-06-20 |
| CN102503284B CN102503284B (en) | 2013-10-09 |
Family
ID=46215435
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110354321 Active CN102503284B (en) | 2011-11-10 | 2011-11-10 | Foam concrete |
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| CN (1) | CN102503284B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106187005A (en) * | 2016-07-06 | 2016-12-07 | 无锡市华东电力设备有限公司 | A kind of foam concrete and preparation method thereof |
| CN106703884A (en) * | 2017-01-13 | 2017-05-24 | 中南大学 | Cooling method for thermal insulating layer on wall surface of high-temperature hard rock roadway of deep well |
| CN109707404A (en) * | 2018-12-10 | 2019-05-03 | 中交一公局桥隧工程有限公司 | A kind of foam concrete construction technology |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1824623A (en) * | 2005-02-22 | 2006-08-30 | 王亦德 | Foamed concrete material and its application |
-
2011
- 2011-11-10 CN CN 201110354321 patent/CN102503284B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1824623A (en) * | 2005-02-22 | 2006-08-30 | 王亦德 | Foamed concrete material and its application |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106187005A (en) * | 2016-07-06 | 2016-12-07 | 无锡市华东电力设备有限公司 | A kind of foam concrete and preparation method thereof |
| CN106703884A (en) * | 2017-01-13 | 2017-05-24 | 中南大学 | Cooling method for thermal insulating layer on wall surface of high-temperature hard rock roadway of deep well |
| CN109707404A (en) * | 2018-12-10 | 2019-05-03 | 中交一公局桥隧工程有限公司 | A kind of foam concrete construction technology |
| CN109707404B (en) * | 2018-12-10 | 2020-07-17 | 中交一公局桥隧工程有限公司 | Foam concrete construction process |
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| Publication number | Publication date |
|---|---|
| CN102503284B (en) | 2013-10-09 |
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