CN103508712B - High-performance cast-in-place foam concrete and preparation method thereof - Google Patents
High-performance cast-in-place foam concrete and preparation method thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of an energy-saving building material, and relates to high-performance cast-in-place foam concrete and a preparation method thereof. The high-performance cast-in-place foam concrete is prepared from the following raw materials in parts by weight: 100-520 parts of cement, 25-180 parts of admixture, 80-320 parts of lightweight aggregate, 0.8-6.4 parts of foaming agent, 75-300 parts of water, 1.6-12 parts of additive and 2-28 parts of modifier in a mixing manner. The foam concrete prepared by the preparation method is light in weight, high in strength, excellent in waterproofness, good in heat preservation effect, free of poison, durable and the same as a building in service life, and is suitable for casting internal and external wall bodies in place, roof and ground heat preservation and foundation pit backfill of a pier pavement and the like.
Description
Technical field
The invention belongs to building thermal-insulation energy-saving field of material technology, relate to a kind of High-performance cast-in-place foam concrete and preparation method thereof.
Background technology
At present, China's development is advocating low-carbon environment-friendly, energy-saving and emission-reduction, material of construction light thermal-insulation always.In the organic-based material that building thermal insulation material market is conventional, as polystyrene foam plate, phenolic foam board etc., its fire resistance extreme difference, easy firing, best phenol formaldehyde foam only can only reach B1 level, and weathering resistance is poor, and work-ing life is short, and replacement cost is high.And in inorganic heat insulation material: the cost value of multicellular glass, foamed aluminium, foamed ceramics is very high; Although the fiber heat preservation material prices such as rock wool are lower slightly, because it is not mechanically resistant material, can application property poor, and have harm to people's health, easily make people scratchy from head to foot, silicosis etc.; In addition, the particulate bulk such as pearlstone, glass bead lagging material, loosely not easily uses, and with the bonding then density of cement rubber powder is large, heat insulation effect is undesirable, their application is restricted.Therefore have that fire resistance is good, the foamed concrete of heat insulating, light sound-proof, shockproof function is widely used in building operation at present.
Building heat preservation is heat insulation is the main application fields of foamed concrete, accounts for 80% of foamed concrete ultimate production at present for building heat insulation.And the cast-in-place construction of the low-quality lower performance in heat insulating aspect occupies about 90%, the high performance cast-in-place product and the high performance cellular concrete product that meet technical requirements are few, the defect existed: 1. in secondary stirring process, dry density is lower, foam is evenly more difficult with mixing of slurry, can cause foam aperture size and skewness, intensity is low, and heat conductivility declines; 2. in secondary stirring process, along with the loss of foam, slurry can be increasingly diluted, thus causes sedimentation of gathering materials, and can not be evenly distributed in slurry, makes construction and intensity be difficult to be guaranteed; 3. intensity and thermal conductivity conflict, reduces thermal conductivity if want, just needs the content improving foam in foamed concrete, i.e. void content, thus the reduction causing intensity; 4. in foamed concrete, air vent wall structural constituent is unreasonable, and form non-fully and close hole, cause water-intake rate to increase, heat conductivility declines; 5. ordinary Portland cement is long for time of coagulation, and foam defoaming process is fast, the generation of the mould phenomenon that causes collapsing; , along with external environment change, can efflorescence be there is through certain hour in 6. the mixing of aluminosulfate cement.
Summary of the invention
The object of the present invention is to provide a kind of High-performance cast-in-place foam concrete and preparation method thereof.：
For achieving the above object, the technical solution used in the present invention is:
A kind of High-performance cast-in-place foam concrete, counts by weight, the properties-correcting agent mixing of the light-weight aggregate of the cement of 100-520, the adulterant of 25-180,80-320, the whipping agent of 0.8-6.4, the water of 75-300, the admixture of 1.6-12 and 2-28.
Described cement is ordinary Portland cement; Described adulterant is breeze and coal ash; Described admixture is polycarboxylate water-reducer, Calucium Silicate powder and sodium sulfate; Described properties-correcting agent is polypropylene fibre, redispersable latex powder, hydrophober, and described light-weight aggregate is the haydites of book structure of particle diameter 3-12mm.
Described breeze and flyash by weight 1-2:1 ratio mix; The 1:2:2 ratio mixing by weight of described polycarboxylate water-reducer, Calucium Silicate powder and sodium sulfate; The 0.5:1:1 ratio mixing by weight of polypropylene fibre, redispersable latex powder, hydrophober.
Described polypropylene fibre length is between 4-10mm; Described light-weight aggregate is haydites of book structure, particle diameter 3-12mm, more than cylindrical compress strength 4.5Mpa.
The preparation method of High-performance cast-in-place foam concrete, with foaming machine by the whipping agent foaming agent water solution of diluting obtain foam, then the mixing of cement, adulterant, light-weight aggregate, admixture, properties-correcting agent water and remaining water is stirred 2-3min with 20-40r/min speed and be mixed to get compound slurry, last being added in compound slurry by foam again carries out mix and blend 2-3min with the speed of 50-100r/min, discharging is built in a mold or pumping is built, maintenance is shaping, obtained cast-in-place foamed concrete.
Described cement is ordinary Portland cement; Described adulterant is breeze and coal ash; Described admixture is polycarboxylate water-reducer, Calucium Silicate powder and sodium sulfate; Described properties-correcting agent is polypropylene fibre, redispersable latex powder, hydrophober, and described light-weight aggregate is the haydites of book structure of particle diameter 3-12mm.
Described breeze and flyash by weight 1-2:1 ratio mix; The 1:2:2 ratio mixing by weight of described polycarboxylate water-reducer, Calucium Silicate powder and sodium sulfate; The 0.5:1:1 ratio mixing by weight of polypropylene fibre, redispersable latex powder, hydrophober.
Described whipping agent needs to be added to the water dilution, and water is 20-30:1 with blowing agent composition weight ratio, then obtains foam by foaming machine.
The advantage that the present invention has:
1. the present invention adopts ordinary Portland cement, during cast in situs and matrix be combined.
2. in properties-correcting agent of the present invention, redispersable latex powder to be filled in foamed concrete air vent wall between hydrated cementitious crystalline product in a large number, form network blackboard, remarkable reduction foamed concrete rigidity, and the aqueous solution has the bonding strength that viscosity can improve foamed concrete, improve foamed concrete and the bonding strength between gathering materials, foamed concrete is made to reach more high flexibility, more high-adhesive-strength and waterproof effect; Silicone based hydrophober, by forming chemical bond, makes the surface of silylation to cement matrix of hydrophobic type, plays waterproof action, effectively waterproof steady in a long-term.
3. the stirring technique adopted in preparation process of the present invention is reasonable, gelling material can be made to mix with gathering materials, stir again after foam adds, the unit weight increase avoiding stirring technique that lather collapse is caused.
4. part of the present invention is applicable to external and internal wall cast in situs, has wall self-insulation, sound insulation, alleviates buildings deadweight, the effects such as antidetonation.
Embodiment
Below in conjunction with specific embodiment, the present invention is further described, but not as limiting to the invention.
Embodiment 1
The preparation of High-performance cast-in-place foam concrete: by cement 150kg, adulterant 115kg, light-weight aggregate 80kg, water 155kg, admixture 2.0kg and properties-correcting agent 2.0kg, mix and be mixed to get compound slurry with 30r/min speed stirring 3min, simultaneously will by 20.80kg water with foaming machine, 1.04kg whipping agent, dilute 20 times of foaming agent water solution obtained and make foam, finally added in compound slurry by foam again and carry out mix and blend 2min with the speed of 80r/min, discharging is built in a mold or pumping is built, maintenance is shaping, obtained cast-in-place foamed concrete.
Described foam is that 1.04kg whipping agent is added 20.80kg dilution with water, and the mass ratio wherein diluting whipping agent water used and whipping agent is 1:20; Described cement is the ordinary Portland cement of Liaoning Zhong Bei heavily fortified point despot board strength of cement grade P.O42.5; Described adulterant is breeze and flyash, and breeze and flyash by weight 2:1 ratio mix; Described admixture is WJF type polycarboxylate water-reducer (volume is the 0.4%-1.0% of cement and adulterant gross weight, water-reducing rate 40%), Calucium Silicate powder and the sodium sulfate (in admixture the 1:2:2 ratio mixing by weight of polycarboxylate water-reducer, Calucium Silicate powder and sodium sulfate) that Shenyang Yi Lida admixture construction plant produces; Described properties-correcting agent is polypropylene fibre, redispersable latex powder, hydrophober (in properties-correcting agent the 0.5:1:1 ratio mixing by weight of polypropylene fibre, redispersable latex powder, hydrophober), and wherein redispersable latex powder is the multipolymer that Shanxi three-dimensional produces with polyvinyl alcohol the ethylene-vinyl acetate being protective colloid; Hydrophober is that Shanxi three-dimensional produces silicone based hydrophober; Described light-weight aggregate is the haydites of book structure of the particle diameter 3-12mm that Qi Yuan Pottery product company limited of Daliang City produces; Described whipping agent is the safe HTW-1 type compound foaming agent of Henan China; Tap water is adopted in described High-performance cast-in-place foam concrete; Described light-weight aggregate is the haydites of book structure that Qi Yuan Pottery product company limited of Daliang City produces, particle diameter 3-12mm, more than cylindrical compress strength 4.5Mpa.
Embodiment 2:
The preparation of High-performance cast-in-place foam concrete: by cement 165kg, adulterant 130kg, light-weight aggregate 150kg, water 167kg, admixture 3.0kg and properties-correcting agent 2.5kg, mix and be mixed to get compound slurry with 40r/min speed stirring 3min, simultaneously with foaming machine by 13.40kg water, 0.67kg whipping agent, dilute 20 times of foaming agent water solution obtained and make foam, finally added in compound slurry by foam again and carry out mix and blend 2min with the speed of 80r/min, discharging is built in a mold or pumping is built, maintenance is shaping, obtained cast-in-place foamed concrete.
The described foaming agent aqueous solution is that 0.67kg whipping agent is added 13.40kg dilution with water, and the mass ratio wherein diluting whipping agent water used and whipping agent is 1:20; Described cement is Liaoning Zhong Bei heavily fortified point despot's board strength of cement grade ordinary Portland cement P.042.5; Described adulterant is breeze and flyash, and breeze and flyash by weight 1:1 ratio mix; Described admixture is WJF type polycarboxylate water-reducer (volume is the 0.4-1.0% of cement and adulterant gross weight, water-reducing rate 40%), Calucium Silicate powder and the sodium sulfate (in admixture the 1:2:2 ratio mixing by weight of polycarboxylate water-reducer, Calucium Silicate powder and sodium sulfate) that Shenyang Yi Lida admixture construction plant produces; Described properties-correcting agent is polypropylene fibre, redispersable latex powder, hydrophober (in properties-correcting agent the 0.5:1:1 ratio mixing by weight of polypropylene fibre, redispersable latex powder, hydrophober), and wherein redispersable latex powder is the multipolymer that Shanxi three-dimensional produces with polyvinyl alcohol the ethylene-vinyl acetate being protective colloid; Hydrophober is that Shanxi three-dimensional produces silicone based hydrophober; Described light-weight aggregate is the haydites of book structure of the particle diameter 3-12mm that Qi Yuan Pottery product company limited of Daliang City produces; Described whipping agent is the safe HTW-1 type compound foaming agent of Henan China; Tap water is adopted in described High-performance cast-in-place foam concrete; Described light-weight aggregate is the haydites of book structure that Qi Yuan Pottery product company limited of Daliang City produces, particle diameter 3-12mm, more than cylindrical compress strength 4.5Mpa.
Embodiment 3:
The preparation of High-performance cast-in-place foam concrete: by cement 175kg, adulterant 175kg, light-weight aggregate 180kg, water 167kg, admixture 3.6kg and properties-correcting agent 3.6kg, mix and be mixed to get compound slurry with 40r/min speed stirring 3min, simultaneously with foaming machine by 8.20kg water, 0.41kg whipping agent, dilute 20 times of foaming agent water solution obtained and make foam, finally added in compound slurry by foam again and carry out mix and blend 2min with the speed of 80r/min, discharging is built in a mold or pumping is built, maintenance is shaping, obtained cast-in-place foamed concrete.
The described foaming agent aqueous solution is that 0.41kg whipping agent is added 8.20kg dilution with water, and the mass ratio wherein diluting whipping agent water used and whipping agent is 1:20; Described cement is Liaoning Zhong Bei heavily fortified point despot's board strength of cement grade ordinary Portland cement P.042.5; Described adulterant is breeze and flyash, and breeze and flyash by weight 1:1 ratio mix; Described admixture is WJF type polycarboxylate water-reducer (volume is the 0.4-1.0% of cement and adulterant gross weight, water-reducing rate 40%), Calucium Silicate powder and the sodium sulfate (in admixture the 1:2:2 ratio mixing by weight of polycarboxylate water-reducer, Calucium Silicate powder and sodium sulfate) that Shenyang Yi Lida admixture construction plant produces; Described properties-correcting agent is polypropylene fibre, redispersable latex powder, hydrophober (in properties-correcting agent the 0.5:1:1 ratio mixing by weight of polypropylene fibre, redispersable latex powder, hydrophober), and wherein redispersable latex powder is the multipolymer that Shanxi three-dimensional produces with polyvinyl alcohol the ethylene-vinyl acetate being protective colloid; Hydrophober is that Shanxi three-dimensional produces silicone based hydrophober; Described light-weight aggregate is the haydites of book structure of the particle diameter 3-12mm that Qi Yuan Pottery product company limited of Daliang City produces; Described whipping agent is the safe HTW-1 type compound foaming agent of Henan China; Tap water is adopted in described High-performance cast-in-place foam concrete; Described light-weight aggregate is the haydites of book structure that Qi Yuan Pottery product company limited of Daliang City produces, particle diameter 3-12mm, more than cylindrical compress strength 4.5Mpa.
The foamed concrete hole distribution measuring above three embodiment components formation is respectively even, and quality is light, and intensity is large and water resistance is remarkable, detection method establishing criteria JG-T266-2011, and its performance is as table 1:
Table 1
| Embodiment | Dry density (kg/m3) | Ultimate compression strength (Mpa) | Thermal conductivity (w/m.k) |
| 1 | 423 | 4.7 | 0.075 |
| 2 | 516 | 5.8 | 0.080 |
| 3 | 605 | 7.5 | 0.083 |
As can be seen from Table 1, in the corresponding standard of ultimate compression strength of the present invention between C4-C10, and dry density value of the present invention when being worth corresponding with dry density in standard thermal conductivity ratio standard-required much lower, the present invention had both had higher ultimate compression strength thus, having again good heat-insulating property, is a kind of high performance foamed concrete.
Claims (5)
1. a High-performance cast-in-place foam concrete, it is characterized in that: count by weight, the properties-correcting agent mixing of the light-weight aggregate of the cement of 100-520, the adulterant of 25-180,80-320, the whipping agent of 0.8-6.4, the water of 75-300, the admixture of 1.6-12 and 2-28;
Described cement is ordinary Portland cement; Described adulterant is breeze and coal ash; Described admixture is polycarboxylate water-reducer, Calucium Silicate powder and sodium sulfate; Described properties-correcting agent is polypropylene fibre, redispersable latex powder, hydrophober, and described light-weight aggregate is the haydites of book structure of particle diameter 3-12mm;
Described breeze and flyash by weight 1-2:1 ratio mix; The 1:2:2 ratio mixing by weight of described polycarboxylate water-reducer, Calucium Silicate powder and sodium sulfate; The 0.5:1:1 ratio mixing by weight of polypropylene fibre, redispersable latex powder, hydrophober;
Described polypropylene fibre length is between 4-10mm; Described light-weight aggregate is haydites of book structure, particle diameter 3-12mm, more than cylindrical compress strength 4.5Mpa.
2. the preparation method by High-performance cast-in-place foam concrete according to claim 1, it is characterized in that: obtain foam by the foaming agent water solution that whipping agent dilutes by foaming machine, then the mixing of cement, adulterant, light-weight aggregate, admixture, properties-correcting agent and remaining water is stirred 2-3min with 20-40r/min speed and be mixed to get compound slurry, last being added in compound slurry by foam again carries out mix and blend 2-3min with the speed of 50-100r/min, discharging is built in a mold or pumping is built, maintenance is shaping, obtained cast-in-place foamed concrete.
3., by the preparation method of High-performance cast-in-place foam concrete according to claim 2, it is characterized in that: described cement is ordinary Portland cement; Described adulterant is breeze and coal ash; Described admixture is polycarboxylate water-reducer, Calucium Silicate powder and sodium sulfate; Described properties-correcting agent is polypropylene fibre, redispersable latex powder, hydrophober, and described light-weight aggregate is the haydites of book structure of particle diameter 3-12mm.
4., by the preparation method of High-performance cast-in-place foam concrete according to claim 2, it is characterized in that: described breeze and flyash by weight 1-2:1 ratio mix; The 1:2:2 ratio mixing by weight of described polycarboxylate water-reducer, Calucium Silicate powder and sodium sulfate; The 0.5:1:1 ratio mixing by weight of polypropylene fibre, redispersable latex powder, hydrophober.
5. by the preparation method of High-performance cast-in-place foam concrete according to claim 2, it is characterized in that: described whipping agent needs to be added to the water dilution, water is 20-30:1 with blowing agent composition weight ratio, then obtains foam by foaming machine.
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