CN104153512B - A kind of processing method of building waste foamed concrete composite heat insulation block - Google Patents
A kind of processing method of building waste foamed concrete composite heat insulation block Download PDFInfo
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- CN104153512B CN104153512B CN201410383718.3A CN201410383718A CN104153512B CN 104153512 B CN104153512 B CN 104153512B CN 201410383718 A CN201410383718 A CN 201410383718A CN 104153512 B CN104153512 B CN 104153512B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/24—Structural elements or technologies for improving thermal insulation
- Y02A30/244—Structural elements or technologies for improving thermal insulation using natural or recycled building materials, e.g. straw, wool, clay or used tires
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
A kind of processing method of building waste foamed concrete composite heat insulation block.Provide one can maximize and optimize regrown material performance, and then guarantee the processing method of building waste foamed concrete composite heat insulation block of finished product resistance to compression, shearing resistance, heat-insulating property.Described building block comprises matrix and thermal-insulation core, described building block preparation process comprises that matrix is shaping, core body preparation, maintenance and drying process, 1), the classification of building waste and tentatively sorting described matrix includes cement, active mixed material, modifier and regeneration aggregate, and the processing method of described regeneration aggregate is:; 2), building waste thick broken, obtained size is less than the graininess regenerated coarse aggregate of 10mm; 3), regenerated coarse aggregate mechanical enhancer, in regenerated coarse aggregate, press the weight ratio admixture natural sand of 1:0.2-1, by stand-by for fine sand in particle diameter 0.25-0.5mm in described mechanical enhancer aggregate.This bond strength is high, even, and the water imbibition of monomer reduces, and reduce cost of production, production technology is simple.
Description
Technical field
The present invention relates to the method adopting building waste to manufacture building materials, particularly relate to a kind of method utilizing building waste to prepare foam concrete block, belong to environmental protection and construction wall heat insulating material technical field.
Background technology
China is in the economic construction high-speed developing period, and the annual Solid construction obsolete material produced has reached several hundred million ton, and the overwhelming majority, all without any process, is air storage or landfill substantially, causes the wasting of resources and environment pollution.Proportion is maximum in all kinds of building waste total amount for building waste (waste concrete building waste and brick mixed building rubbish), is the main object that current construction refuse resource is disposed and utilized.At present, waste concrete building waste and brick mixed building rubbish are mainly processed into regenerated coarse aggregate and recycled fine aggregate, for the production of the inorganic mixture in concrete, mortar, concrete block, concrete brick and highway construction.The regeneration aggregate corner angle that simple crushing building waste obtains are many, in rough surface, component also containing hardened cement mortar, add concrete block in shattering process because damage accumulation causes a large amount of micro-crack in inside, cause that the porosity of construction refuse regenerated aggregate self is large, water absorption rate is large, pile up that void content is large, crush index value is high, bulk density is little, performance is obviously inferior to natural aggregate.Limit the scope of application of construction refuse regenerated material, constrain development and the technical level of present stage construction refuse resource industry.
Deepen constantly enforcement along with national environmental protection and Sustainable development policies, how construction refuse resource is utilized, realize the strengthening of construction refuse regenerated aggregate, improve the high value added utilization of construction refuse regenerated aggregate, become important technical and social topics.
At present, the hollow brick used in China's building operations and building block are ordinary concrete hollow block mostly, and its heat insulating and sound insulating is poor, and easily mortar is infiltrated in building construction hollow in, easily make body of wall bond not full.Polyphenyl foam sandwich building block, easily produces disaster hidden-trouble because polyphenyl foam material exposes, and application life is general shorter, promotes the use of and obtains restriction.In addition, polyphenyl foam sandwich building block is generally polyphenyl foam is first made into the cylinder with the hollow cooperation of building-block, then clogs in the cavity of building block, complicated construction technique.Adopt the foam concrete block prepared of physical foaming process, there is early strength development compared with the shortcoming such as slow, low strength, water absorption rate are large, easy to crack.Therefore building trade is badly in need of one and was both incubated, sound insulation, prevent fires again, durable, easily build by laying bricks or stones, building block that integrated cost is low.
Therefore, realize the intensive treatment of construction refuse regenerated aggregate, utilize the construction refuse regenerated aggregate after strengthening to prepare high performance composite heat insulation block, significant for the technological progress promoting national sustainable development policy and building material industry.
For this reason, in the prior art, existingly prepare with building waste the technology that regeneration aggregate carries out shaping and disclose.Title " construction refuse regenerated aggregate trimmer disclosed in State Intellectual Property Office, application number: 201210377694.1, the applying date: 2012-09-27 " patented technology, the document discloses a kind of construction refuse regenerated aggregate trimmer, its mechanism utilizes metal roller and helical blade wherein, building waste coarse aggregate is processed, aggregate is subject to the effect of variable-pitch auger blade in cylindrical drum, each other and and impact several times friction between cylindrical drum inwall and blade, the cement mortar removed the corner angle on it and do not come off, realize the shaping strengthening of aggregate, flow out finally by taper discharge barrel.Find through test, this technology truly has certain effect for the cement mortar that removal aggregate body (monomer) corner angle, aggregate adhere to.But it is perhaps also not obvious to adopt this technology to prepare solid brick, but then there is following problem in the insulating brick making environment-friendly type: the regeneration aggregate adopting this technology to obtain cannot meet the needs of foam process, and its insulation blocks intensity prepared is well below national standard.We find that main cause is that the overall uniformity of regeneration aggregate surface that is inadequate, aggregate body (monomer) is in fact effectively strengthened (passivation) process and (mainly rubbed between monomer and monomer by analysis, the monomer ratio that can contact with metal barrel and blade is few), the obtained aggregate body of this kind of technique is finally made to there will be stress concentration phenomenon (as shown in Figure 9 when framework foamed bricks body microstructure, namely when the sharp corners of aggregate monomer towards bubble 7 and close together time, very easily form stress to concentrate, form crack 8).In addition because surface does not obtain Passivation Treatment in fact, the water absorption rate of monomer is also higher, also can affect end properties.
Summary of the invention
The present invention is directed to above problem, provide one and can maximize and optimize regrown material performance, and then guarantee the processing method of building waste foamed concrete composite heat insulation block of finished product resistance to compression, shearing resistance, heat-insulating property.
Technical scheme of the present invention is: described building block comprises the matrix with hollow cavity and the thermal-insulation core be filled in described hollow cavity, described building block preparation process comprises that matrix is shaping, core body preparation, maintenance and drying process, described matrix includes cement, active mixed material, modifier and is regeneration aggregate prepared by raw material with building waste;
The processing method of described regeneration aggregate is:
1), the classification of building waste and tentatively sorting, retain wherein waste concrete building waste and brick mixed building rubbish, stand-by;
2), building waste thick broken, described waste concrete building waste and brick mixed building rubbish are slightly broken with jaw crusher, obtained size is less than the graininess regenerated coarse aggregate of 10mm;
3), regenerated coarse aggregate mechanical enhancer, admixture natural sand in regenerated coarse aggregate, the weight ratio of regenerated coarse aggregate and natural sand is 1:0.2-1, described natural sand comprises the medium sand being of a size of 0.35-0.5mm, utilize the hard sand grains of described natural sand as broken carrier, stirring or shot blasting equipment is used to carry out in small, broken bits together with natural sand by described regenerated coarse aggregate, cement mortar and the grain corner of described regenerated coarse aggregate surface adhesion is removed, obtained mechanical enhancer aggregate by the mutual shock between granular material, ablation;
By stand-by for fine sand in particle diameter 0.25-0.5mm in described mechanical enhancer aggregate;
Material repetitive cycling particle diameter in described mechanical enhancer aggregate being greater than 0.5mm utilizes;
By stand-by for the Extra-fine sand being less than 0.25mm in described mechanical enhancer aggregate.
The coarse sand being of a size of 0.5-3mm is also comprised in described natural sand.
Carry out chemical enhanced further to described middle fine sand, describedly chemical enhancedly be: utilize organic slurry to process regeneration aggregate, namely adopt organic slurry to draining after regeneration aggregate dipping or organic slurry being sprayed at regeneration aggregate surface, make in slurry infiltration to the gap and micro gap of regenerated coarse aggregate surface course, produce mechanical engagement and tessellation, microscopic checks is filled, bonds, combine firmly after solidification, and be solidified into one deck organic film on regeneration aggregate surface after air-dry, reduce the water absorbing properties of regeneration aggregate; Described organic slurry is the one or any several composite in acrylic resin, vinyl acetate-ethylene copolymerization emulsions or styrene-butadiene emulsion.
Described matrix molding procedure is: by recycled fine aggregate 15-40 weight portion, cement 20-30 weight portion, active mixed material 10-40 weight portion, modifier 0.5-1.2 weight portion and water 20-30 weight portion mixing and stirring after strengthening, stir again after adding blowing agent, be poured into mould, " crust " is excised, the hollow base body of producing foamed concrete block after chemical blowing completes;
Described active mixed material is flyash, silicon ash, ground slag, kaolin one or any several mixture;
Described modifier is a kind of in early strength admixture, accelerating admixture, foam stabilizer, waterproof agent, reinforcing agent, antimitotic agent or any several mixture.
Described " crust " is pulverized for particle diameter is less than the multiplexing powder of 0.25mm, stand-by.
Core body preparation section is:
By described Extra-fine sand 5-10 weight portion, cement 70-85 weight portion, active mixed material 10-20 weight portion and modifier 0.5-1.5 weight portion mixing and stirring, stir again after adding blowing agent, inject the hollow cavity of described matrix, again must be contour and smooth with described matrix end face by surfacing, make described core body and matrix cementing as a whole; The addition of described blowing agent is no more than 300kg/m with the density controlling described core body
3be as the criterion.
Core body preparation section is:
By described multiplexing powder 5-15 weight portion, cement 70-85 weight portion, active mixed material 10-20 weight portion and modifier 0.5-1.0 weight portion mixing and stirring, stir again after adding blowing agent, inject the hollow cavity of described matrix, again must be contour and smooth with described matrix end face by surfacing, make described core body and matrix cementing as a whole; The addition of described blowing agent is no more than 300kg/m with the density controlling described core body
3be as the criterion.
Core body preparation section is:
By described multiplexing powder 5-12 weight portion, Extra-fine sand 5-18 weight portion, cement 70-85 weight portion, active mixed material 10-20 weight portion and modifier 0.5-1.0 weight portion mixing and stirring, stir again after adding blowing agent, inject the hollow cavity of described matrix, again must be contour and smooth with described matrix end face by surfacing, make described core body and matrix cementing as a whole; The addition of described blowing agent is no more than 300kg/m with the density controlling described core body
3be as the criterion.
Described maintenance operation is: adopt natural curing or stream curing;
Described stream curing curing temperature is 40 DEG C-90 DEG C, and curing time is 4h-12h, and then natural curing is to 25-28 days;
Described natural curing should maintenance 25-28 days under field conditions (factors).
Described drying process is: by overdue for maintenance building waste foamed concrete composite heat insulation block in forced air drying indoor seasoning, drying room temperature is 40 DEG C-90 DEG C, drying time reaches respective country with the relative moisture content of building waste foamed concrete composite heat insulation block or industry standard is as the criterion, cooled building waste foamed concrete composite heat insulation block adopts Polypropylence Sheet packaging, should have rainproof, moisture preventive measure during stacking.
The present invention compared with prior art, has the following advantages:
1), by regeneration aggregate with the natural aggregate of hard mix and carry out mechanical enhancer, utilize organic slurry to infiltrate pretreatment to regeneration aggregate, the surface texture improving regeneration aggregate makes its basic mechanical properties close to natural aggregate.Especially mechanical enhancer measure of the present invention, have employed hardness, the higher natural sand of intensity is as carrier (last part natural sand is as one of the component of building block of the present invention), relative to the phase mutual friction mainly utilized in prior art between material of the same race, clash into, the present invention utilizes hard natural soft-clay to the passivation (sclerosis of regeneration aggregate monomer surface, polishing) process, each surface of every monomer is made all to have an opportunity to accept the friction of natural soft-clay, clash into, make every monomer not only surface blemish processed, surface obtains effective Passivation Treatment simultaneously, make the bond strength of monomer and cement higher, evenly, the water imbibition of monomer reduces.
2) solid waste such as building waste, useless brick and tile, is utilized to prepare foam concrete block matrix, significantly reduce cost of production, saved because building waste piles up the soil taken, decreased environment pollution, achieve the recycling of building waste, save natural resource.After " crust " excision of foam concrete block matrix, pulverizing is used for preparing foaming cement thermal insulation core body again, and secondary utilizes building waste, realizes the recycling of building waste further.
3), the processing method of building block of the present invention for first to prepare foam concrete block hollow base body, then makes thermal-insulation core to filling-foam cement in foam concrete block cavity, make the two effectively cementingly be integrated, and production technology is simple.
4), compared with the building block of other kinds, building block matrix and thermal-insulation core is prepared owing to all adopting chemical blowing method, this building block has that lightweight, intensity are high, the feature such as good heat insulating, durable and good application property, is a kind of building wall material of structure-function integration.
After testing, the building waste foam concrete block matrix dry apparent density obtained according to technical solution of the present invention is 1200kg/m
3, cubic compressive strength 12.0MPa, coefficient of thermal conductivity 0.2755W/ (mk).Foaming cement thermal insulation core body dry apparent density 230kg/m
3, cubic compressive strength is 0.24MPa, and coefficient of thermal conductivity is 0.0550W/ (mK).Building waste foamed concrete composite heat insulation block dry apparent density of the present invention is 750kg/m
3, strength grade reaches MU3.5, and average thermal resistance is 1.520 (m
2k)/W.
Accompanying drawing explanation
Fig. 1 is the structural representation of manufactured goods of the present invention,
Fig. 2 is the schematic diagram of matrix molding procedure one in the present invention,
Fig. 3 is the schematic diagram of matrix molding procedure two in the present invention,
Fig. 4 is the schematic diagram of matrix molding procedure three in the present invention,
Fig. 5 is the schematic diagram of core forming technique one in the present invention,
Fig. 6 is the schematic diagram of core forming technique two in the present invention,
Fig. 7 is the schematic diagram of regenerated coarse aggregate mechanical enhancer in the present invention,
Fig. 8 is the microstructure schematic diagram of manufactured goods of the present invention,
Fig. 9 is the microstructure schematic diagram of prior art products of the present invention;
In figure, 1 is matrix, and 11 is crusts, and 2 is core bodys, and 21 is core body crusts, and 3 is matrix moulding forms, and 4 is regenerated coarse aggregates, and 41 is middle fine sands, and 5 is natural sand, and 6 is mixing plants, and 7 is bubbles, and 8 is cracks.
Detailed description of the invention
The present invention as shown in figures 1-8, building block comprises the matrix 1 with hollow cavity and the thermal-insulation core (as Fig. 1) 2 be filled in hollow cavity 1, described building block preparation process comprises that matrix is shaping, core body preparation, maintenance and drying process, described matrix includes cement, active mixed material, modifier and is regeneration aggregate prepared by raw material with building waste;
The processing method of described regeneration aggregate is:
1), the classification of building waste and tentatively sorting, retain wherein waste concrete building waste and brick mixed building rubbish, stand-by;
2), building waste thick broken, described waste concrete building waste and brick mixed building rubbish are slightly broken with jaw crusher, obtained size is less than the graininess regenerated coarse aggregate of 10mm;
3), regenerated coarse aggregate mechanical enhancer, to regenerated coarse aggregate 4 admixture natural sand 5, regenerated coarse aggregate 4 is 1:0.2-1 with the weight ratio of natural sand 5, described natural sand 5 comprises the medium sand being of a size of 0.35-0.5mm, utilize the hard sand grains of described natural sand as broken carrier, stirring or shot blasting equipment (for mixing plant 6) is used to carry out in small, broken bits together with natural sand 5 by described regenerated coarse aggregate 4, cement mortar and the grain corner of described regenerated coarse aggregate surface adhesion is removed, obtained mechanical enhancer aggregate by the mutual shock between granular material, ablation; As shown in Figure 7;
Herein, natural sand can fully contact with building waste wherein, its effect is: remove the corner angle of granular building waste, in conjunction with after loose material (as cement mortar), after manufactured goods solidification can be guaranteed, bond strength between particle, cement, avoid stress to concentrate, and then improve the mechanical strength (resistance to compression, anti-shearing) of building block entirety; In addition, the natural soft-clay of hard plays induration to building waste surface (particle after such as fragment of brick division), and then reduces its water absorption rate;
By stand-by for fine sand 41 in particle diameter 0.25-0.5mm in described mechanical enhancer aggregate;
Material repetitive cycling particle diameter in described mechanical enhancer aggregate being greater than 0.5mm utilizes;
By stand-by for the Extra-fine sand being less than 0.25mm in described mechanical enhancer aggregate.
The coarse sand being of a size of 0.5-3mm is also comprised in described natural sand.The linear velocity of adding when the object of coarse sand mainly solves the interphase interaction of hard abrasive material (i.e. natural soft-clay) and material (building waste monomer) has certain velocity interval, and then can carry out comprehensive process to the different flaws of material.Such as, corner angle need the CONTACT WITH FRICTION of fast speed, and crack needs the contact of comparatively jogging speed, comparatively large " moment of torsion ", and the attachment (cement mortar) on material then needs impact, the vibration of friction speed.
Carry out chemical enhanced further to described middle fine sand, describedly chemical enhancedly be: utilize organic slurry to process regeneration aggregate, namely adopt organic slurry to draining after regeneration aggregate dipping or organic slurry being sprayed at regeneration aggregate surface, make in slurry infiltration to the gap and micro gap of regenerated coarse aggregate surface course, produce mechanical engagement and tessellation, microscopic checks is filled, bonds, combine firmly after solidification, and be solidified into one deck organic film on regeneration aggregate surface after air-dry, reduce the water absorbing properties of regeneration aggregate; Described organic slurry is the one or any several composite in acrylic resin, vinyl acetate-ethylene copolymerization emulsions or styrene-butadiene emulsion.Make in slurry infiltration to the gap and micro gap of regenerated coarse aggregate surface course, produce mechanical engagement and tessellation, microscopic checks is filled, bond, combine firmly after solidification, and be solidified into one deck organic film on regeneration aggregate surface after air-dry, reduce the water absorbing properties of regeneration aggregate.Aggregate microscopic checks is filled by slurries, bonding, is solidified into one deck organic film after air-dry at aggregate surface, reduces the water absorbing properties of regeneration aggregate.Directly affect the workability of mixture due to water absorption rate and decisive influence is risen to the drying shrinkage of later stage building block, so the reduction of water absorption rate is the important indicator evaluating treatment effect.
The good fluidity of acrylic resin itself, at room temperature can solidify in the shorter time, regeneration aggregate is infiltrated acrylic resin slurries 0.5h, then air-dry at ambient temperature, membrane structure thickness after solidification is even, energy and aggregate closely combine, and obviously reduce aggregate water absorption rate to 2.63%, close to natural aggregate water absorption rate.
Vinyl acetate-ethylene copolymerization emulsions because viscosity is too high, mobility is poor, therefore mixes 10% water dilution, and add 0.1-0.5% cellulose, cellulose has good adhesion effect, can keep even, the stability of aqueous polymer dispersion.Regeneration aggregate is infiltrated in the emulsion after dilution and soak 2h, then air-dry at ambient temperature.Vinyl acetate-ethylene copolymerization emulsions has good film forming, and the membrane structure after solidification is evenly good.Reduce aggregate water absorption rate to 6.75%.
The good fluidity of styrene-butadiene emulsion itself, infiltrates regeneration aggregate in emulsion and soaks 2h, then air-dry at ambient temperature.Membrane structure after solidification is evenly good.
For the consumption of above chemical enhanced reagent, those skilled in the art can select according to the aridity of material during practical application, climatic factor, repeat no more herein.
Described matrix molding procedure is: by recycled fine aggregate 15-40 weight portion, cement 20-30 weight portion, active mixed material 10-40 weight portion, modifier 0.5-1.2 weight portion and water 20-30 weight portion mixing and stirring after strengthening, stir again after adding blowing agent, be poured into mould (i.e. matrix moulding form 3), " crust " 11 is excised after chemical blowing completes, the hollow base body of producing foamed concrete block, as in Figure 2-4;
Described active mixed material is a kind of in flyash, silicon ash, ground slag, kaolin or any several mixture;
Described modifier is a kind of in early strength admixture, accelerating admixture, foam stabilizer, waterproof agent, reinforcing agent, antimitotic agent or any several mixture.
In view of aforementioned substrates shaping in the use amount of other component, those skilled in the art independently can adjust according to requirements in above-mentioned scope, repeat no more herein.
Described " crust " is pulverized for particle diameter is less than the multiplexing powder of 0.25mm, stand-by.
Core body preparation section has following three kinds of embodiments (as shown in Figure 5,6):
First:
By described Extra-fine sand 5-10 weight portion, cement 70-85 weight portion, active mixed material 10-20 weight portion and modifier 0.5-1.5 weight portion mixing and stirring, stir again after adding blowing agent, inject the hollow cavity of described matrix, again must be contour and smooth with described matrix end face by surfacing, make described core body and matrix cementing as a whole; The addition of described blowing agent is no more than 300kg/m with the density controlling described core body
3be as the criterion.The present embodiment has carried out sufficient utilization to the leftover materials after building waste mechanical enhancer.
Second:
By described multiplexing powder 5-15 weight portion, cement 70-85 weight portion, active mixed material 10-20 weight portion and modifier 0.5-1.0 weight portion mixing and stirring, stir again after adding blowing agent, inject the hollow cavity of described matrix, again must be contour and smooth with described matrix end face by surfacing, make described core body and matrix cementing as a whole; The addition of described blowing agent is no more than 300kg/m with the density controlling described core body
3be as the criterion.The crushed material of the crust after the present embodiment is shaping to matrix has carried out sufficient utilization.
3rd:
By described multiplexing powder 5-12 weight portion, Extra-fine sand 5-18 weight portion, cement 70-85 weight portion, active mixed material 10-20 weight portion and modifier 0.5-1.0 weight portion mixing and stirring, stir again after adding blowing agent, inject the hollow cavity of described matrix, again must be contour and smooth with described matrix end face by surfacing, make described core body and matrix cementing as a whole; The addition of described blowing agent is no more than 300kg/m with the density controlling described core body
3be as the criterion.The present embodiment to the leftover materials after building waste mechanical enhancer and matrix shaping after the crushed material of crust fully utilize.
Control to blowing agent when above three kinds of embodiment key points are to operate, to control to solidify rear core body density for using the standard of blowing agent.This point, those skilled in the art, according to enlightenment of the present invention, can obtain after testing.
Described maintenance operation is: adopt natural curing or stream curing;
Described stream curing curing temperature is 40 DEG C-90 DEG C, and curing time is 4h-12h, and then natural curing is to 25-28 days;
Described natural curing should maintenance 25-28 days under field conditions (factors).
Described drying process is: by overdue for maintenance building waste foamed concrete composite heat insulation block in forced air drying indoor seasoning, drying room temperature is 40 DEG C-90 DEG C, drying time reaches respective country with the relative moisture content of building waste foamed concrete composite heat insulation block or industry standard is as the criterion, cooled building waste foamed concrete composite heat insulation block adopts Polypropylence Sheet packaging, should have rainproof, moisture preventive measure during stacking.
The present invention is directed to the weak point of lower, the existing heat insulating type concrete one hand tile of China's building waste level of comprehensive utilization and production technology thereof, there is provided a kind of thermal property excellent, do not fire, good endurance, economic and practical building waste foamed concrete composite heat insulation block and processing method thereof, to improve the added value of building waste comprehensive utilization, improve China's building waste in walling industry level of comprehensive utilization, realize construction refuse resource scale and utilize.Play the effect of energy-saving and emission-reduction, protection of the environment, meet develop a circular economy, low-carbon economy and social sustainable development strategic demand.Compared with prior art have the following advantages: infiltrate through mechanical enhancer and organic slurry the surface texture that pretreated method improves regeneration aggregate after adopting regeneration aggregate to mix with natural aggregate and make its basic mechanical properties close to natural aggregate; Foam concrete block matrix is prepared after the solid waste break process such as building waste, useless brick and tile, after " crust " excision of foam concrete block matrix, pulverizing is used for preparing foaming cement thermal insulation core body again, secondary utilizes building waste, significantly reduce cost of production, save because building waste piles up the soil taken, reduce environment pollution, achieve the recycling of building waste.Building block of the present invention has that lightweight, intensity are high, the advantage such as good heat insulating and good application property.Building frame structure external and internal wall, country building external and internal wall etc. can be widely used in.
Claims (8)
1. the processing method of a building waste foamed concrete composite heat insulation block, described building block comprises the matrix with hollow cavity and the thermal-insulation core be filled in described hollow cavity, described building block preparation process comprises that matrix is shaping, core body preparation, maintenance and drying process, described matrix includes cement, active mixed material, modifier and is regeneration aggregate prepared by raw material with building waste;
It is characterized in that, the processing method of described regeneration aggregate is:
1), the classification of building waste and tentatively sorting, retain wherein waste concrete building waste and brick mixed building rubbish, stand-by;
2), building waste thick broken, described waste concrete building waste and brick mixed building rubbish are slightly broken with jaw crusher, obtained size is less than the graininess regenerated coarse aggregate of 10mm;
3), regenerated coarse aggregate mechanical enhancer, admixture natural sand in regenerated coarse aggregate, the weight ratio of regenerated coarse aggregate and natural sand is 1:0.2-1, described natural sand comprises the medium sand being of a size of 0.35-0.5mm, utilize the hard sand grains of described natural sand as broken carrier, stirring or shot blasting equipment is used to carry out in small, broken bits together with natural sand by described regenerated coarse aggregate, cement mortar and the grain corner of described regenerated coarse aggregate surface adhesion is removed, obtained mechanical enhancer aggregate by the mutual shock between granular material, ablation;
By stand-by for fine sand in particle diameter 0.25-0.5mm in described mechanical enhancer aggregate;
Material repetitive cycling particle diameter in described mechanical enhancer aggregate being greater than 0.5mm utilizes;
By stand-by for the Extra-fine sand being less than 0.25mm in described mechanical enhancer aggregate.
2. the processing method of a kind of building waste foamed concrete composite heat insulation block according to claim 1, is characterized in that, also comprise the coarse sand being of a size of 0.5-3mm in described natural sand.
3. the processing method of a kind of building waste foamed concrete composite heat insulation block according to claim 1 and 2, it is characterized in that, described matrix molding procedure is: by recycled fine aggregate 15-40 weight portion, cement 20-30 weight portion, active mixed material 10-40 weight portion, modifier 0.5-1.2 weight portion and water 20-30 weight portion mixing and stirring after strengthening, stir again after adding blowing agent, be poured into mould, " crust " is excised, the hollow base body of producing foamed concrete block after chemical blowing completes;
Described active mixed material is a kind of in flyash, silicon ash, ground slag, kaolin or any several mixture;
Described modifier is early strength admixture, accelerating admixture, foam stabilizer, waterproof agent, reinforcing agent, antimitotic agent one or any several mixture.
4. the processing method of a kind of building waste foamed concrete composite heat insulation block according to claim 3, is characterized in that, described " crust " is pulverized as particle diameter is less than the multiplexing powder of 0.25mm, stand-by.
5. the processing method of a kind of building waste foamed concrete composite heat insulation block according to claim 1 and 2, it is characterized in that, core body preparation section is:
By described Extra-fine sand 5-10 weight portion, cement 70-85 weight portion, active mixed material 10-20 weight portion and modifier 0.5-1.5 weight portion mixing and stirring, stir again after adding blowing agent, inject the hollow cavity of described matrix, again must be contour and smooth with described matrix end face by surfacing, make described core body and matrix cementing as a whole; The addition of described blowing agent is no more than 300kg/m with the density controlling described core body
3be as the criterion.
6. the processing method of a kind of building waste foamed concrete composite heat insulation block according to claim 4, it is characterized in that, core body preparation section is:
By described multiplexing powder 5-15 weight portion, cement 70-85 weight portion, active mixed material 10-20 weight portion and modifier 0.5-1.0 weight portion mixing and stirring, stir again after adding blowing agent, inject the hollow cavity of described matrix, again must be contour and smooth with described matrix end face by surfacing, make described core body and matrix cementing as a whole; The addition of described blowing agent is no more than 300kg/m with the density controlling described core body
3be as the criterion.
7. the processing method of a kind of building waste foamed concrete composite heat insulation block according to claim 4, it is characterized in that, core body preparation section is:
By described multiplexing powder 5-12 weight portion, Extra-fine sand 5-18 weight portion, cement 70-85 weight portion, active mixed material 10-20 weight portion and modifier 0.5-1.0 weight portion mixing and stirring, stir again after adding blowing agent, inject the hollow cavity of described matrix, again must be contour and smooth with described matrix end face by surfacing, make described core body and matrix cementing as a whole; The addition of described blowing agent is no more than 300kg/m with the density controlling described core body
3be as the criterion.
8. the processing method of a kind of building waste foamed concrete composite heat insulation block according to claim 1, it is characterized in that, described drying process is: by overdue for maintenance building waste foamed concrete composite heat insulation block in forced air drying indoor seasoning, drying room temperature is 40 DEG C-90 DEG C, drying time reaches respective country with the relative moisture content of building waste foamed concrete composite heat insulation block or industry standard is as the criterion, cooled building waste foamed concrete composite heat insulation block adopts Polypropylence Sheet packaging, should have rainproof, moisture preventive measure during stacking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410383718.3A CN104153512B (en) | 2014-08-06 | 2014-08-06 | A kind of processing method of building waste foamed concrete composite heat insulation block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410383718.3A CN104153512B (en) | 2014-08-06 | 2014-08-06 | A kind of processing method of building waste foamed concrete composite heat insulation block |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104153512A CN104153512A (en) | 2014-11-19 |
| CN104153512B true CN104153512B (en) | 2016-03-16 |
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| CN104556873A (en) * | 2014-12-30 | 2015-04-29 | 合肥宝丽环保科技有限公司 | Preparation method of lightweight high-strength baking-free brick |
| CN105084850B (en) * | 2015-08-19 | 2017-04-12 | 铜陵铜冠建安新型环保建材科技有限公司 | Production process of high-performance standard autoclaved brick |
| CN105330206A (en) * | 2015-10-21 | 2016-02-17 | 南京梅山海强新型建材有限公司 | Non-bearing recycled fine aggregate concrete perforated brick |
| RU2625063C1 (en) * | 2016-07-18 | 2017-07-11 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Петербургский государственный университет путей сообщения Императора Александра I" | Mixture for autoclave foamed concrete |
| CN106673506A (en) * | 2016-12-16 | 2017-05-17 | 朱海东 | Processing method of aerated brick with heat insulation and heat preservation for walls |
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| CN108178581A (en) * | 2018-01-19 | 2018-06-19 | 南通职业大学(江苏省南通技师学院、江苏省南通市高级技工学校) | A kind of composite heat insulation block and preparation method thereof |
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| CN112573849A (en) * | 2019-09-28 | 2021-03-30 | 枫林环保科技股份有限公司 | Recycled fine aggregate prepared from construction waste |
| CN110627525A (en) * | 2019-10-17 | 2019-12-31 | 徐州工程学院 | Method for preparing temperature-control energy-saving heat-insulating material by utilizing waste concrete |
| CN110984065B (en) * | 2019-12-12 | 2021-08-03 | 四川省水利科学研究院 | Hydraulic structure of red-bed soft rock |
| CN111548079A (en) * | 2020-05-25 | 2020-08-18 | 山东天意机械股份有限公司 | Foamed concrete decorative heat-insulation building block prepared from detoxified fly ash and processing method thereof |
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| CN113929382A (en) * | 2021-09-30 | 2022-01-14 | 中国一冶集团有限公司 | Full-solid waste aggregate ultrahigh-strength concrete and preparation method thereof |
| CN115536322A (en) * | 2022-10-17 | 2022-12-30 | 菏泽城建绿源环保科技有限公司 | Recycled red brick coarse aggregate high-flow concrete and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002087857A (en) * | 2000-09-18 | 2002-03-27 | Takenaka Komuten Co Ltd | Production process of recycled aggregate |
| JP5068082B2 (en) * | 2007-01-25 | 2012-11-07 | 日本原子力発電株式会社 | Interlocking block reusing the whole amount of demolished concrete and manufacturing method thereof |
| CN101508544A (en) * | 2009-02-25 | 2009-08-19 | 中国建筑材料科学研究总院 | Construction garbage concrete segment and method for producing the same |
| CN102010144A (en) * | 2010-11-01 | 2011-04-13 | 青岛理工大学 | Method for preparing high-quality recycled fine aggregate by using waste concrete |
| CN102757208A (en) * | 2012-07-20 | 2012-10-31 | 济南大学 | Size and method for treating recycled coarse aggregates |
| CN103570317B (en) * | 2013-11-15 | 2015-09-30 | 北京新奥混凝土集团有限公司 | A kind of clear-water concrete using construction refuse regenerated aggregate to produce |
| CN104960073B (en) * | 2014-02-21 | 2017-04-05 | 中国建筑材料科学研究总院 | A kind of utilization production mould processes the production method of combined type building block |
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