CN103342517A - EPS flowing concrete and preparation method thereof - Google Patents
EPS flowing concrete and preparation method thereof Download PDFInfo
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- CN103342517A CN103342517A CN2012104731079A CN201210473107A CN103342517A CN 103342517 A CN103342517 A CN 103342517A CN 2012104731079 A CN2012104731079 A CN 2012104731079A CN 201210473107 A CN201210473107 A CN 201210473107A CN 103342517 A CN103342517 A CN 103342517A
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Abstract
The invention provides an EPS flowing concrete and a preparation method thereof. The EPS flowing concrete comprises portland cement, medium sand, broken stones, an FDN high-efficiency composite water reducer, fly ash, silica fume, polyvinyl acetate emulsion and EPS particles, wherein the polyvinyl acetate emulsion can modify surface activity of the EPS particles, so that the EPS particles can be uniformly distributed, the FDN high-efficiency composite water reducer is added in an amount of 1.00 % of a total amount of the portland cement and the fly ash, and the polyvinyl acetate emulsion is added in an amount of 1.20 % of a total amount of the portland cement and the fly ash. The EPS flowing concrete is prepared by adding the EPS particles into a mixed mortar of the fly ash, the silica fume and the FDN high-efficiency composite water reducer as well as ordinary portland cement, water and the polyvinyl acetate emulsion, and then adding the medium sand and the broken stones. The EPS flowing concrete is low in cost, light in weight, and outstanding in energy absorption property, anti-fragmentation property and anti-electromagnetic property, and improves using performance of civil air defense doors as well as energy absorption property of the civil air defense doors in wartime.
Description
Technical field
The present invention relates to fields such as new concrete preparation, be specifically related to the concrete material that is applicable to that the closed guard gate fills.
Background technology
High speed development along with science and technology, on a large scale, high-intensity continuous air attack oneself become one of outstanding feature of Modern High-Tech's local war, therefore on the basis of enforcement camouflage, the civil air defense constructions and installations of constructing superior performance is initiatively to defend to preserve the effective means that effective strength is fought and strikeed back in the high-tech war.Existing closed guard gate's packing material is mainly Steel Concrete, exists that volume is big, quality is heavy, the shortcoming of motion inconvenience, and its antiknock flame proof, energy absorption performance are relatively poor, as easy as rolling off a log damaging under the strike of precision guided weapon.Therefore, develop the material that a kind of quality is light, penertration resistance is functional, energy absorption characteristics is outstanding, the antiknock explosion insulation performance is superior the closed guard gate is filled, the anti-strike capability for the use properties of improving the closed guard gate, raising closed guard gate has important practical value.
Chinese patent CN201110091374.5 discloses a kind of clad steel reinforced concrete protective door (being the closed guard gate), pointed out that there is the defective of " thick big heaviness " in existing similar Steel Concrete protective door, and it is also serious day by day to mention the serial problem that causes thus, so propose to adopt novel ultra-light porous metal material and high-strength hybrid fiber concrete to be used in combination, in the hope of addressing this problem.There is following problem in this packing material: though the capability of resistance to penetration height, energy absorption performance is poor, and from great, cost is higher.
The EPS concrete the has been a kind of admixture mineral substance bonded concrete of EPS particle.By changing the EPS mix proportion, can prepare unit weight from 250kg/m
3To 2000kg/m
3The concrete that waits not, intensity improves successively.From aspects such as unit weight, energy absorption performance, capability of resistance to penetration, economy, site operation difficulty, resistances to elevated temperatures, the EPS concrete possesses the potentiality of the civil air defense constructions and installations of being applicable to.
The EPS chutable concrete that the present invention studies is to be applied to the closed guard gate fill, and therefore, when considering its structure and configuration, must base oneself upon closed guard gate's filling and consider from actual needs.Its main technical requirements has: the ⑴ lightweight also possesses certain intensity.Unit weight should be controlled at 1800kg/m
3About, could effectively reduce closed guard gate's deadweight like this.Ultimate compression strength should not be lower than 20MPa, so just can possess certain capability of resistance to penetration; ⑵ fluidised form performance is outstanding, self-compacting degree height.Because closed guard gate's self structure complexity, the construction difficulty of vibrating is very big, to must use flowing concrete with closed guard gate's filling the time, so just can make concrete fully be filled into closed guard gate's inside; ⑶ concrete grating necessarily will be got well.To add competent structure more because of the inner part of closed guard gate, and the space is less, and aggregate should be not more than 15mm; ⑷ proportioning is simple as far as possible.People's air defense is filled and must be considered emergent the filling.Therefore, proportioning must be tried one's best simply, and material therefor should be common used material, conveniently draws materials nearby; ⑸ construction technology is simple as far as possible.
Summary of the invention
For overcome exist among the existing closed guard gate or energy absorption performance poor, perhaps from great, perhaps the higher deficiency of cost the present invention proposes a kind of EPS chutable concrete and preparation method thereof.
EPS chutable concrete of the present invention, every 1m
3In comprise the EPS particle of 330.00kg～386.00kg ordinary Portland cement, 180.00kg～190.00kg water, 101.9kg～331.50kg medium sand, 187.00kg～596.50kg rubble, 5.13kg～efficient composite water-reducing agent of 5.99kg FDN, 183.00kg～235.00kg flyash, 25.40kg～29.60kg silicon ash, 6.16kg～7.19kg polyvinyl acetate emulsion, 300L～500L; Wherein, polyvinyl acetate emulsion is interface modifier, can change the EPS granule surface activity, makes the EPS particle evenly to distribute; The efficient composite water-reducing agent of FDN is pressed 1.00% admixture of ordinary Portland cement and flyash sum, and polyvinyl acetate emulsion is pressed 1.20% admixture of ordinary Portland cement and flyash sum.
The invention allows for a kind of method for preparing described EPS chutable concrete, specifically may further comprise the steps:
Step 1: obtain flyash; Al in the collected flyash
2O
3Content 〉=15%, SiO
2Content 〉=35%;
Step 2: obtain the silicon ash; Described silicon ash satisfies SO
2Content 〉=85%;
Step 3: obtain the efficient composite water-reducing agent of FDN; The efficient composite water-reducing agent of described FDN satisfies water-reducing rate 〉=20%;
Step 4: obtain ordinary Portland cement; Described grade of cement standard should be 42.5R or 52.5R;
Step 5: preparation combination ash; Described combination ash is made up of flyash, silicon ash, the efficient composite water-reducing agent of FDN and ordinary Portland cement; When preparing the combination ash of being formed by flyash, silicon ash, the efficient composite water-reducing agent of FDN and ordinary Portland cement, described ordinary Portland cement is divided into 2 parts, wherein first part is used for the combination ash that the preparation of this step is made up of flyash, silicon ash, the efficient composite water-reducing agent of FDN and ordinary Portland cement, and second part for the preparation of mixture slurry; During preparation, in the EPS of a unit chutable concrete, the silicon ash of 183.00～213kg flyash, 25.40kg～29.60kg, the efficient composite water-reducing agent of FDN of 5.13kg～5.99kg are mixed with first part of ordinary Portland cement, the employing ordinary method stirs, churning time is 30s, obtains the combination ash made from flyash, silicon ash, FDN and cement;
Step 6: preparation mixes mortar; Described mixing mortar is made up of with the mortar that mixes of water, polyvinyl acetate emulsion the combination ash that obtains; Described water is divided into 2 parts, and wherein first part is used for this step preparation mixing mortar, and second part for the preparation of mixture slurry; During preparation, the polyvinyl acetate emulsion of first part of water and 6.16kg～7.19kg is joined in the combination ash that is prepared by step 5, the employing ordinary method stirs, and churning time is 30s, obtains the mixing mortar of combination ash, part water and polyvinyl acetate emulsion;
Step 7: obtain the EPS particle; By recovery system EPS packaged product waste material is sent into the production cycle system again, pulverize into the EPS particle, the EPS particle of namely regenerating, the regeneration EPS particle that adopts Gaoling County foam factory to produce in the present embodiment;
Step 8: preparation combination ash slurry; Described combination ash slurry is formed by mixing mortar, EPS particle, water and cement; The EPS particle of 300～500L is added in the combination ash that obtains, and ordinary method stirs, and churning time is 30s; Add second part of water and second part of cement, adopt ordinary method to stir, churning time is 30s, obtains with mixing the mixture slurry that mortar, EPS particle, water and cement are made;
Step 9: obtain medium sand;
Step 10: obtain rubble; The particle diameter of described rubble is not more than 15mm;
Step 11: preparation EPS chutable concrete; The medium sand of 101.90～331.50kg and the rubble adding of 187.00～596.50kg are obtained in the mixture slurry, ordinary method stirs, churning time is 120s, and the EPS chutable concrete mix that is evenly flowed obtains the EPS chutable concrete after conventional maintenance.
The present invention is with the use properties of improving the closed guard gate, the energy absorption ability that improves the closed guard gate in wartime.The advantage of prepared EPS chutable concrete mainly contains: low, the energy-saving and environmental protection of (1) cost, reason are to adopt regeneration EPS particle, compare with primary EPS particle, and variation has all taken place for regeneration EPS coating of particles, condition of surface, grating etc.Regeneration EPS particle surface is coarse, part EPS particle opening, and cement slurry enters hole easily, is conducive to the bonding of EPS particle and cement matrix.Regeneration EPS particle has certain grating, can form close-packed structure, and hollow rate is low, to the demand reduction of cement slurry, takes all factors into consideration from concrete performance, trashformation, environmental protection and economy, and using regeneration EPS granules preparation concrete is optimal selection; (2) strong in the lightweight: the little (800 ~ 1800kg/m of density
3), ultimate compression strength can reach 20MPa; (3) has outstanding EAC, can cushion effectively, vibration damping, reduce stress amplitude, reason is: the distinctive cavity characteristics of EPS concrete causes it to exist three phases in distortion: the elastic region, yield point elongation district and dense area, excellent EAC mainly shows the surrender stage, when being subjected to foreign impacts load, be easy to deform, deflection is big and the stress of fluidity level is lower, in the compression set process, consume a large amount of merits, change it distortion of structure mesopore into, cave in, break, the energy that various forms such as cell wall friction dissipate, thus extraneous impact energy absorbed effectively; (4) has certain anti-fragmentation performance, reason is: the energy absorption performance of EPS, and the concrete vesicular structure of EPS, make it in the process of fragmentation penetration, though can not directly resist the energy of fragmentation, energy that can the mass consumption fragmentation in and the process that runs through destroyed at it, and also itself can not produce additional stress, effectively protected the steel plate of closed guard gate's nexine, and the additional injury of having avoided concrete self to splash and bring; (5) has outstanding anti-electromagnetic wave performance, reason is: EPS is a kind of good electromagnetic wave transparent material, and the EPS particle is more even through the distribution in cement matrix after the surface treatment, so just effectively improve the matching degree of concrete impedance and spatial wave impedance, can guide incident electromagnetic wave to enter material internal.Simultaneously the EPS particle has coated one deck cement layer through fully mixing the rear surface with cement slurry, can the scattered portion hertzian wave, so EPS filling concrete matrix material can equivalence be a kind of closed pore honeycomb structure.When hertzian wave incides composite inner and propagates, can repeatedly reflection and scattering take place at each EPS particle surface just, cause electromagnetic power loss, its synoptic diagram is as shown in Figure 1.In addition, when hertzian wave incides adjacent holes by a closed pore, interfering at hole wall direction phase change, also is a major reason of its energy decrement.
Along with development of science and technology, growth in the living standard, discarded EPS particle is seen everywhere, and causes the severe contamination of environment.Discarded EPS particle is reclaimed as concrete stopping composition, will produce good economy, society and environmental benefit.The excellent properties of strong in its lightweight, energy-absorbing, anti-fragmentation performance, anti-electromagnetic wave performance makes it to have in civil air defense constructions and installations important and purposes widely.Therefore, be suitable as closed guard gate's packing material.
Description of drawings
Accompanying drawing 1 is that hertzian wave repeatedly reflects and scattering at the EPS inside concrete.
Accompanying drawing 2 is EPS chutable concrete preparation method schemas.
Embodiment
Embodiment one
Present embodiment is a kind of EPS chutable concrete.
Described EPS chutable concrete, every 1m
3In comprise the EPS particle of 330.00kg～386.00kg ordinary Portland cement, 180.00kg～190.00kg water, 101.9kg～331.50kg medium sand, 187.00kg～596.50kg rubble, 5.13kg～efficient composite water-reducing agent of 5.99kg FDN, 183.00kg～235.00kg flyash, 25.40kg～30.00kg silicon ash, 6.16kg～7.19kg polyvinyl acetate emulsion, 300L～500L.Wherein, polyvinyl acetate emulsion is interface modifier, can change the EPS granule surface activity, makes the EPS particle evenly to distribute; The efficient composite water-reducing agent of FDN is pressed 1.00% admixture of ordinary Portland cement and flyash sum, and polyvinyl acetate emulsion is pressed 1.20% admixture of ordinary Portland cement and flyash sum.In the present embodiment, with 1m
3The EPS chutable concrete is a unit.Every 1m
3In the EPS chutable concrete, comprise 330.00kg ordinary Portland cement, 183.00kg flyash, 331.50kg sand, 596.50kg stone, 25.40kg silicon ash, the efficient composite water-reducing agent of 5.13kg FDN, 188.00kg water, 6.16kg polyvinyl acetate emulsion and 300L EPS particle volume volume.
Present embodiment has also proposed a kind of method for preparing described EPS chutable concrete, specifically may further comprise the steps:
Step 1: obtain flyash.Collect the flyash that power plant produces.Al in the collected flyash
2O
3Content 〉=15%, SiO
2Content 〉=35%.Collected flyash be need not sorting, no longer overground, direct admixture, the flyash of the protoplasm original flavor that so obtains has high fineness, high reactivity feature, can guarantee the activity of this flyash more.In the present embodiment, the flyash that adopts second power station, Hancheng to produce.
Step 2: obtain the silicon ash.Described silicon ash satisfies SO
2Content 〉=85%.The silicon ash that adopts Chengdu Bu Shi mechanical engineering company limited to produce in the present embodiment, specific surface area 15～27m
2/ g, SO
2Content 85%～95%.
Step 3: obtain the efficient composite water-reducing agent of FDN.The efficient composite water-reducing agent of described FDN satisfies water-reducing rate 〉=20%.Adopt Guangzhou to build the efficient composite water-reducing agent of FDN that precious building material company limited produces in the present embodiment, water-reducing rate is 20%, powdery.
Step 4: obtain ordinary Portland cement.Described grade of cement standard should be 42.5R or 52.5R.Adopt P.O 42.5R Qinling Mountains board cement in the present embodiment, this cement has following character: the presetting period is 2h10min; Final setting time is 5h10min; Stability boil boil qualified; Standard consistency water requirement 27.5%; Folding strength 3d 6.5MPa, 28d 8.9MPa; Ultimate compression strength 3d31.0MPa, 28d 48.6MPa.
Step 5: preparation combination ash; Described combination ash is made up of flyash, silicon ash, the efficient composite water-reducing agent of FDN and ordinary Portland cement.In the present embodiment, the weight of described ordinary Portland cement is 330.00kg.When preparing the combination ash of being formed by flyash, silicon ash, the efficient composite water-reducing agent of FDN and ordinary Portland cement, described ordinary Portland cement is divided into 2 parts, every part of 165.00kg, wherein first part is used for the combination ash that the preparation of this step is made up of flyash, silicon ash, the efficient composite water-reducing agent of FDN and ordinary Portland cement, and second part for the preparation of mixture slurry.During preparation, in the EPS of a unit chutable concrete, with the flyash of 183.00kg, the silicon ash of 25.40kg, the efficient composite water-reducing agent of FDN of 5.13kg and the cement mixing of 165.00kg, the employing ordinary method stirs, churning time is 30s, obtains the combination ash of the cement of flyash, silicon ash, FDN and 50% weight.
Step 6: preparation mixes mortar; Described mixing mortar is made up of with the mortar that mixes of water, polyvinyl acetate emulsion the combination ash that obtains.In the present embodiment, the weight of water is 188.00kg, when preparation mixes mortar, described 188.00kg water is divided into 2 parts, every part of 94.00kg, and wherein first part is used for this step preparation mixing mortar, and second part for the preparation of mixture slurry.During preparation, the water of 94.00kg and the polyvinyl acetate emulsion of 6.16kg are joined in the combination ash, adopt ordinary method to stir, churning time is 30s, obtains the mixing mortar of combination ash, part water and polyvinyl acetate emulsion.
Step 7: obtain the EPS particle.By recovery system EPS packaged product waste material is sent into the production cycle system again, pulverize into the EPS particle, the EPS particle of namely regenerating, the regeneration EPS particle that adopts Gaoling County foam factory to produce in the present embodiment;
Step 8: preparation combination ash slurry; Described combination ash slurry is formed by mixing mortar, EPS particle, water and cement.The EPS particle of 300L is added in the combination ash that obtains, ordinary method stirs, churning time is 30s, then the water of second part 94.00kg and second part 165.00kg cement are added, the employing ordinary method stirs, churning time is 30s, obtains mixing the mixture slurry of the cement of the water of mortar, EPS particle, 50% weight and 50% weight;
Step 9: obtain medium sand.Adopt Ba korneforos sand in the present embodiment, fineness modulus is 2.78, and grating is qualified, and unit weight is 2630kg/m
3, tap density 1.50kg/L, silt content 1.1%.
Step 10: obtain rubble.The particle diameter of described rubble is not more than 15mm, and reason is that it is more that the inner part of closed guard gate adds competent structure, and the space is less.Adopt the Jingyang County limestone gravel in the present embodiment, the content of particle diameter 5～10mm is 15%; The content of particle diameter 10～15mm is 85%, and unit weight is 2700kg/m
3
Step 11: preparation EPS chutable concrete.The medium sand of 331.50kg and the rubble adding of 596.50kg are obtained in the mixture slurry, and ordinary method stirs, and churning time is 120s, and the EPS chutable concrete mix that is evenly flowed obtains the EPS chutable concrete after conventional maintenance.
Accompanying drawing 2 is seen in concrete operations.
Physical and chemical index and the performance of the EPS chutable concrete that the above embodiment of the present invention is obtained are tested.The result is as follows, the slump: 242.00mm, and divergence: 520.00mm, 28d ultimate compression strength: 20.50MPa has excellent specific properties such as energy-absorbing, anti-fragmentation performance, anti-electromagnetic wave performance simultaneously and satisfies the requirement that is applied to closed guard gate's filling.
Embodiment two
Present embodiment is a kind of EPS chutable concrete.Every 1m
3The EPS particle that comprises 330.00kg～386.00kg ordinary Portland cement, 180.00kg～190.00kg water, 101.9kg～331.50kg medium sand, 187.00kg～596.50k rubble, 5.13kg～efficient composite water-reducing agent of 5.99kg FDN, 183.00kg～235.00kg flyash, 25.40kg～30.00kg silicon ash, 6.16kg～7.19kg polyvinyl acetate emulsion, 300L～500L in the described EPS chutable concrete.Wherein, polyvinyl acetate emulsion is interface modifier, can change the EPS granule surface activity, makes the EPS particle evenly to distribute; The efficient composite water-reducing agent of FDN is pressed 1.00% admixture of ordinary Portland cement and flyash sum, and polyvinyl acetate emulsion is pressed 1.20% admixture of ordinary Portland cement and flyash sum.In the present embodiment, with 1m
3The EPS chutable concrete is a unit.Every 1m
3In the EPS chutable concrete, comprise 42.5R ordinary Portland cement: 386.00kg; Flyash: 213.50kg; Sand: 215.00kg; Stone 386.00kg; Silicon ash 29.68kg; FDN:5.99kg; Water: 184.00kg; Polyvinyl acetate emulsion: 7.19kg; EPS particle volume volume: 400L.
Present embodiment has also proposed a kind of method for preparing described EPS chutable concrete, specifically may further comprise the steps:
Step 1: obtain flyash.Collect the flyash that power plant produces.Al in the collected flyash
2O
3Content 〉=15%, SiO
2Content 〉=35%.Collected flyash be need not sorting, no longer overground, direct admixture, the flyash of the protoplasm original flavor that so obtains has high fineness, high reactivity feature, can guarantee the activity of this flyash more.In the present embodiment, the flyash that adopts second power station, Hancheng to produce.
Step 2: obtain the silicon ash.Described silicon ash satisfies SO
2Content 〉=85%.The silicon ash that adopts Chengdu Bu Shi mechanical engineering company limited to produce in the present embodiment, specific surface area 15～27m
2/ g, SO
2Content 85% ~ 95%.
Step 3: obtain the efficient composite water-reducing agent of FDN.The efficient composite water-reducing agent of described FDN satisfies water-reducing rate 〉=20%.Adopt Guangzhou to build the efficient composite water-reducing agent of FDN that precious building material company limited produces in the present embodiment, water-reducing rate is 20%, powdery.
Step 4: obtain ordinary Portland cement.Described grade of cement standard should be 42.5R or 52.5R.Adopt P.O 42.5R Qinling Mountains board cement in the present embodiment, this cement has following character: the presetting period is 2h10min; Final setting time is 5h10min; Stability boil boil qualified; Standard consistency water requirement 27.5%; Folding strength 3d 6.5MPa, 28d 8.9MPa; Ultimate compression strength 3d31.0MPa, 28d 48.6MPa.
Step 5: preparation combination ash; Described combination ash is made up of flyash, silicon ash, the efficient composite water-reducing agent of FDN and ordinary Portland cement.In the present embodiment, the weight of described ordinary Portland cement is 386.00kg.When preparing the combination ash of being formed by flyash, silicon ash, the efficient composite water-reducing agent of FDN and ordinary Portland cement, described ordinary Portland cement is divided into 2 parts, every part of 193.00kg, wherein first part is used for the combination ash that the preparation of this step is made up of flyash, silicon ash, the efficient composite water-reducing agent of FDN and ordinary Portland cement, and second part for the preparation of mixture slurry.During preparation, in the EPS of a unit chutable concrete, with the flyash of 213.50kg, the silicon ash of 29.68kg, the efficient composite water-reducing agent of FDN of 5.99kg and the cement mixing of 193.00kg, the employing ordinary method stirs, churning time is 30s, obtains the combination ash of the cement of flyash, silicon ash, FDN and 50% weight.
Step 6: preparation mixes mortar; Described mixing mortar is made up of with the mortar that mixes of water, polyvinyl acetate emulsion the combination ash that obtains.In the present embodiment, the weight of water is 184.00kg, when preparation mixes mortar, described 184.00kg water is divided into 2 parts, every part of 92.00kg, and wherein first part is used for this step preparation mixing mortar, and second part for the preparation of mixture slurry.During preparation, the water of 92.00kg and the polyvinyl acetate emulsion of 7.19kg are joined in the combination ash, adopt ordinary method to stir, churning time is 30s, obtains the mixing mortar of combination ash, part water and polyvinyl acetate emulsion.
Step 7: obtain the EPS particle.By recovery system EPS packaged product waste material is sent into the production cycle system again, pulverize into the EPS particle, the EPS particle of namely regenerating, the regeneration EPS particle that adopts Gaoling County foam factory to produce in the present embodiment;
Step 8: preparation combination ash slurry; Described combination ash slurry is formed by mixing mortar, EPS particle, water and cement.The EPS particle of 400L is added in the combination ash that obtains, ordinary method stirs, churning time is 30s, then the water of second part 92.00kg and second part 193.00kg cement are added, the employing ordinary method stirs, churning time is 30s, obtains mixing the mixture slurry of the cement of the water of mortar, EPS particle, 50% weight and 50% weight;
Step 9: obtain medium sand.Adopt Ba korneforos sand in the present embodiment, fineness modulus is 2.78, and grating is qualified, and unit weight is 2630kg/m
3, tap density 1.50kg/L, silt content 1.1%.
Step 10: obtain rubble.The particle diameter of described rubble is not more than 15mm, and reason is that it is more that the inner part of closed guard gate adds competent structure, and the space is less.Adopt the Jingyang County limestone gravel in the present embodiment, the content of particle diameter 5～10mm is 15%; The content of particle diameter 10～15mm is 85%, and unit weight is 2700kg/m
3
Step 11: preparation EPS chutable concrete.The medium sand of 215.00kg and the rubble adding of 386.00kg are obtained in the mixture slurry, and ordinary method stirs, and churning time is 120s, and the EPS chutable concrete mix that is evenly flowed obtains the EPS chutable concrete after conventional maintenance.
Accompanying drawing 2 is seen in concrete operations.
Physical and chemical index and the performance of the EPS chutable concrete that the above embodiment of the present invention is obtained are tested.The result is as follows, the slump: 240.00mm, and divergence: 495.00mm, 28d ultimate compression strength: 22.69MPa has excellent specific properties such as energy-absorbing, anti-fragmentation performance, anti-electromagnetic wave performance simultaneously and satisfies the requirement that is applied to closed guard gate's filling.
Embodiment three
Present embodiment is a kind of EPS chutable concrete.Described EPS chutable concrete, every 1m
3In comprise the EPS particle of 330.00kg～386.00kg ordinary Portland cement, 180.00kg～190.00kg water, 101.9kg～331.50kg sand, 187.00kg～596.50kg rubble, 5.13kg～efficient composite water-reducing agent of 5.99kg FDN, 183.00kg～235.00kg flyash, 25.40kg～30.00kg silicon ash, 6.16kg～7.19kg polyvinyl acetate emulsion, 300L～500L.Wherein, polyvinyl acetate emulsion is interface modifier, can change the EPS granule surface activity, makes the EPS particle evenly to distribute; The efficient composite water-reducing agent of FDN is pressed 1.00% admixture of ordinary Portland cement and flyash sum, and polyvinyl acetate emulsion is pressed 1.20% admixture of ordinary Portland cement and flyash sum.In the present embodiment, every 1m
3In the EPS chutable concrete, comprise 52.5R ordinary Portland cement: 378.00kg; Flyash: 195.50kg; Sand: 101.90kg; Stone 187.00kg; Silicon ash 28.10kg; The efficient composite water-reducing agent of FDN: 5.74kg; Water: 180.20kg; Polyvinyl acetate emulsion: 6.88kg; EPS particle volume volume: 500L.
Present embodiment has also proposed a kind of method for preparing described EPS chutable concrete, specifically may further comprise the steps:
Step 1: obtain flyash.Collect the flyash that power plant produces.Al in the collected flyash
2O
3Content 〉=15%, SiO
2Content 〉=35%.Collected flyash be need not sorting, no longer overground, direct admixture, the flyash of the protoplasm original flavor that so obtains has high fineness, high reactivity feature, can guarantee the activity of this flyash more.In the present embodiment, the flyash that adopts second power station, Hancheng to produce.
Step 2: obtain the silicon ash.Described silicon ash satisfies SO
2Content 〉=85%.The silicon ash that adopts Chengdu Bu Shi mechanical engineering company limited to produce in the present embodiment, specific surface area 15 ~ 27m
2/ g, SO
2Content 85% ~ 95%.
Step 3: obtain the efficient composite water-reducing agent of FDN.The efficient composite water-reducing agent of described FDN satisfies water-reducing rate 〉=20%.Adopt Guangzhou to build the efficient composite water-reducing agent of FDN that precious building material company limited produces in the present embodiment, water-reducing rate is 20%, powdery.
Step 4: obtain ordinary Portland cement.Described grade of cement standard should be 42.5R or 52.5R.Adopt P.O 52.5R Qinling Mountains cement in the present embodiment, presetting period 1h55min; Final setting time 4h58min; Stability boil boil qualified; Standard consistency water requirement 29.4%; Folding strength 3d 7.6MPa, 28d 9.4MPa; Ultimate compression strength 3d 38.0MPa, 28d 59.6MPa.
Step 5: preparation combination ash; Described combination ash is made up of flyash, silicon ash, the efficient composite water-reducing agent of FDN and ordinary Portland cement.In the present embodiment, the weight of described ordinary Portland cement is 378.00kg.When preparing the combination ash of being formed by flyash, silicon ash, the efficient composite water-reducing agent of FDN and ordinary Portland cement, described ordinary Portland cement is divided into 2 parts, every part of 189.00kg, wherein first part is used for the combination ash that the preparation of this step is made up of flyash, silicon ash, the efficient composite water-reducing agent of FDN and ordinary Portland cement, and second part for the preparation of mixture slurry.
During preparation, in the EPS of a unit chutable concrete, with the flyash of 195.50kg, the silicon ash of 28.10kg, the efficient composite water-reducing agent of FDN of 5.74kg and the cement mixing of 189.00kg, the employing ordinary method stirs, churning time is 30s, obtains the combination ash of the cement of flyash, silicon ash, FDN and 50% weight.
Step 6: preparation mixes mortar; Described mixing mortar is made up of with the mortar that mixes of water, polyvinyl acetate emulsion the combination ash that obtains.In the present embodiment, the weight of water is 180.20kg, when preparation mixes mortar, described 180.20kg water is divided into 2 parts, every part of 90.10kg, and wherein first part is used for this step preparation mixing mortar, and second part for the preparation of mixture slurry.During preparation, the water of 92.00kg and the polyvinyl acetate emulsion of 6.88kg are joined in the combination ash, adopt ordinary method to stir, churning time is 30s, obtains the mixing mortar of combination ash, part water and polyvinyl acetate emulsion.
Step 7: obtain the EPS particle.By recovery system EPS packaged product waste material is sent into the production cycle system again, pulverize into the EPS particle, the EPS particle of namely regenerating, the regeneration EPS particle that adopts Gaoling County foam factory to produce in the present embodiment;
Step 8: preparation combination ash slurry; Described combination ash slurry is formed by mixing mortar, EPS particle, water and cement.The EPS particle of 500L is added in the combination ash that obtains, ordinary method stirs, churning time is 30s, then the water of second part 90.10kg and second part 189.00kg cement are added, the employing ordinary method stirs, churning time is 30s, obtains mixing the mixture slurry of the cement of the water of mortar, EPS particle, 50% weight and 50% weight;
Step 9: obtain medium sand.Adopt Ba korneforos sand in the present embodiment, fineness modulus is 2.78, and grating is qualified, and unit weight is 2630kg/m
3, tap density 1.50kg/L, silt content 1.1%.
Step 10: obtain rubble.The particle diameter of described rubble is not more than 15mm, and reason is that it is more that the inner part of closed guard gate adds competent structure, and the space is less.Adopt the Jingyang County limestone gravel in the present embodiment, the content of particle diameter 5～10mm is 15%; The content of particle diameter 10～15mm is 85%, and unit weight is 2700kg/m
3
Step 11: preparation EPS chutable concrete.The medium sand of 101.90kg and the rubble adding of 187.00kg are obtained in the mixture slurry, and ordinary method stirs, and churning time is 120s, and the EPS chutable concrete mix that is evenly flowed obtains the EPS chutable concrete after conventional maintenance.
Accompanying drawing 2 is seen in concrete operations.
Physical and chemical index and the performance of the EPS chutable concrete that the above embodiment of the present invention is obtained are tested.The result is as follows, the slump: 249.00mm, divergence: 532.00mm, actual measurement unit weight: 1090.89mm, 28d ultimate compression strength: 21.50MPa has excellent specific properties such as energy-absorbing, anti-fragmentation performance, anti-electromagnetic wave performance simultaneously and satisfies the requirement that is applied to closed guard gate's filling.
Claims (2)
1. EPS chutable concrete, it is characterized in that, described EPS chutable concrete comprises the EPS particle of 330.00kg～386.00kg ordinary Portland cement, 180.00kg～190.00kg water, 101.9kg～331.50kg medium sand, 187.00kg～596.50kg rubble, 5.13kg～efficient composite water-reducing agent of 5.99kg FDN, 183.00kg～235.00kg flyash, 25.40kg～29.60kg silicon ash, 6.16kg～7.19kg polyvinyl acetate emulsion, 300L～500L among every 1m3; Wherein, polyvinyl acetate emulsion is interface modifier, can change the EPS granule surface activity, makes the EPS particle evenly to distribute; The efficient composite water-reducing agent of FDN is pressed 1.00% admixture of ordinary Portland cement and flyash sum, and polyvinyl acetate emulsion is pressed 1.20% admixture of ordinary Portland cement and flyash sum.
2. a method for preparing the described EPS chutable concrete of claim 1 is characterized in that, specifically may further comprise the steps:
Step 1: obtain flyash; The content of Al2O3 〉=15% in the collected flyash, the content of SiO2 〉=35%;
Step 2: obtain the silicon ash; Described silicon ash satisfies SO2 content 〉=85%;
Step 3: obtain the efficient composite water-reducing agent of FDN; The efficient composite water-reducing agent of described FDN satisfies water-reducing rate 〉=20%;
Step 4: obtain ordinary Portland cement; Described grade of cement standard should be 42.5R or 52.5R;
Step 5: preparation combination ash; Described combination ash is made up of flyash, silicon ash, the efficient composite water-reducing agent of FDN and ordinary Portland cement; When preparing the combination ash of being formed by flyash, silicon ash, the efficient composite water-reducing agent of FDN and ordinary Portland cement, described ordinary Portland cement is divided into 2 parts, wherein first part is used for the combination ash that the preparation of this step is made up of flyash, silicon ash, the efficient composite water-reducing agent of FDN and ordinary Portland cement, and second part for the preparation of mixture slurry; During preparation, in the EPS of a unit chutable concrete, the silicon ash of 183.00～213kg flyash, 25.40kg～29.60kg, the efficient composite water-reducing agent of FDN of 5.13kg～5.99kg are mixed with first part of ordinary Portland cement, the employing ordinary method stirs, churning time is 30s, obtains the combination ash made from flyash, silicon ash, FDN and cement;
Step 6: preparation mixes mortar; Described mixing mortar is made up of with the mortar that mixes of water, polyvinyl acetate emulsion the combination ash that obtains; Described water is divided into 2 parts, and wherein first part is used for this step preparation mixing mortar, and second part for the preparation of mixture slurry; During preparation, the polyvinyl acetate emulsion of first part of water and 6.16kg～7.19kg is joined in the combination ash that is prepared by step 5, the employing ordinary method stirs, and churning time is 30s, obtains the mixing mortar of combination ash, part water and polyvinyl acetate emulsion;
Step 7: obtain the EPS particle; By recovery system EPS packaged product waste material is sent into the production cycle system again, pulverize into the EPS particle;
Step 8: preparation combination ash slurry; Described combination ash slurry is formed by mixing mortar, EPS particle, water and cement; The EPS particle of 300～500L is added in the combination ash that obtains, and ordinary method stirs, and churning time is 30s; Add second part of water and second part of cement, adopt ordinary method to stir, churning time is 30s, obtains with mixing the mixture slurry that mortar, EPS particle, water and cement are made;
Step 9: obtain medium sand;
Step 10: obtain rubble; The particle diameter of described rubble is not more than 15mm;
Step 11: preparation EPS chutable concrete; The medium sand of 101.90～331.50kg and the rubble adding of 187.00～596.50kg are obtained in the mixture slurry, ordinary method stirs, churning time is 120s, and the EPS chutable concrete mix that is evenly flowed obtains the EPS chutable concrete after conventional maintenance.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104310863A (en) * | 2014-09-10 | 2015-01-28 | 瑞高(浙江)建筑系统有限公司 | EPS (Expandable polystyrene) lightweight aggregate concrete |
| CN109296297A (en) * | 2017-07-24 | 2019-02-01 | 武汉市人防建筑设计研究院 | The closed guard gate of high impact wave can be resisted |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102765905A (en) * | 2012-04-06 | 2012-11-07 | 中国电力科学研究院 | EPS light aggregate concrete composite wall and its construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102765905A (en) * | 2012-04-06 | 2012-11-07 | 中国电力科学研究院 | EPS light aggregate concrete composite wall and its construction method |
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| 白二雷 等: "EPS混凝土冲击压缩韧性研究", 《混凝土》, no. 11, 31 December 2011 (2011-12-31), pages 73 - 76 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104310863A (en) * | 2014-09-10 | 2015-01-28 | 瑞高(浙江)建筑系统有限公司 | EPS (Expandable polystyrene) lightweight aggregate concrete |
| CN109296297A (en) * | 2017-07-24 | 2019-02-01 | 武汉市人防建筑设计研究院 | The closed guard gate of high impact wave can be resisted |
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