CN104788050B - A kind of haydite light-weight aggregate structural concrete and preparation method thereof - Google Patents
A kind of haydite light-weight aggregate structural concrete and preparation method thereof Download PDFInfo
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- CN104788050B CN104788050B CN201510046274.9A CN201510046274A CN104788050B CN 104788050 B CN104788050 B CN 104788050B CN 201510046274 A CN201510046274 A CN 201510046274A CN 104788050 B CN104788050 B CN 104788050B
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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
Abstract
Present invention offer is a kind of to can be used for the haydite light-weight aggregate structural concrete of load-carrying members, is made up of following raw material：340~382kg/m of cement3, 60~68kg/m of flyash3, 525~630kg/m of high performance ceramsite3, common 785~610kg/m of river sand3, 3.2~3.6kg/m of water reducer3, 130~140kg/m of water3；Wherein haydite performance indications are bulk density 800kg/m3Left and right, cylindrical compress strength >=14.6MPa, 1h water absorption rates about 9.3%, the haydite is to be mixed by shale and sludge and fired using certain technique to form, the incorporation of shale causes that haydite has cylindrical compress strength higher, and the use of sludge not only reduces cost and is also conducive to environmental protection.The concrete that this special haydite is made is that a kind of intensity is high, thermal property is good, service behaviour and pumpability disclosure satisfy that the light aggregate concrete of design and construction requirement, its strength grade can reach LC40, density rating reaches 1600, and thermal conductivity factor is 0.65W/ (mK).This concrete is used for the load-carrying members of self-heat conserving structural system, improves the heat-insulating property of Building Heat bridge portion, reduces the appearance of condensation.
Description
Technical field
The present invention relates to New Building Materials field, concrete preparation field, there is provided one kind is by shale sludge mixed sintering
Haydite prepare can be used for the light-weight aggregate structural concrete of load-carrying members.
Background technology
Lightweight aggregate concrete be by light coarse aggregate, light fine aggregate (or normal sands), cement and water be formulated it is apparent close
Degree is not more than 1950kg/m3Concrete.Wherein, the lightweight aggregate concrete being formulated as aggregate by lightweight fine aggregate is complete light
Concrete；It is sand lightweight concrete to do the lightweight aggregate concrete that fine aggregate is formulated by normal sands or part lightweight fine aggregate.Gently
Aggregate concrete is widely used in all kinds of engineerings with the functional characteristics such as its lightweight, high-strength, insulation, heat-insulated, antidetonation, wear-resisting.
Concrete light aggregate mainly includes：1st, natural weight aggregate：Float stone, scoria；2nd, industrial waste：Flyash, haydite,
Expanded slag pearl；3rd, artificial lightweight aggregate：Haydites of book structure, leca, expanded pearlite rock ceramic granule.China's lightweight aggregate is used at this stage
Most is leca, haydites of book structure and lytag etc., and this undoubtedly increased cost, meanwhile, as people are to energy-conservation
The attention of environmental protection, the comprehensive utilizating research work of discarded object turns into a new vital task.Concrete makes in the present invention
Haydite is formed by shale and sludge mixed sintering, on the one hand can ensure that haydite has intensity higher using shale, Gu
Change the heavy metal in sludge, on the other hand can not only effectively reduce the swollen temperature of burning of haydites of book structure using sludge and reduce sludge
The secondary pollution caused to environment after harm and landfill and burning assistant to environment.
With lightweight aggregate coagulation scholar research and the development of practical work, its application field is from non bearing structure toward load-bearing knot
Structure direction is developed.With the trend that severe Energy situation and building energy consumption ratio constantly rise, the propulsion of Building Energy-saving Work
It is very urgent.Based on this, light aggregate concrete of the present invention is applied to self-heat conserving structure instead of traditional normal concrete
The load-carrying members of system, by the low advantage of the thermal conductivity factor of lightweight aggregate concrete, fundamentally improve Building Heat bridge portion
Heat-insulating property, while specification is met to mean heat transfer coefficient requirement, relaxes the requirement to walling unit thermal conductivity factor, accomplishes
Self-heat conserving truly.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, there is provided one kind is formed by shale and firing sludge
The concrete for preparing of haydite, and be successfully applied in the load-carrying members of self-heat conserving structural system, meet energy-conserving and environment-protective
Requirement.
A kind of lightweight aggregate structural concrete, including following raw material：
Cement, flyash, high performance ceramsite, common river sand, water reducer, water；It is former in terms of every cubic metre of lightweight aggregate concrete
Material mixture ratio is constituted as follows：340~382kg of cement, 60~68kg of flyash, high performance ceramsite (after prewetting) 525~630kg,
Common river sand 785~610kg, 3.2~3.6kg of water reducer, 130~140kg of water；
Preferably, described cement is P042.5 Portland cements.
Preferably, the cement is Portland cement, early strength silicate cement, sulphate aluminium cement, sulfuric acid salt solution
One or more in mud, slag cements of mixture.
Preferably, described cement is modified cement, and the meter by weight ratio of the modified cement is as follows：
Attapulgite 20-30 parts；The attapulgite can be preferably attapulgite modified, acidified modified using hydrochloric acid,
Modification procedure is：With 2 moles every liter of HCL and attapulgite, the stirring reaction 10 under 60-63 degrees celsius of solid-to-liquid ratio 1: 4
After minute, after obtaining suspension filtering, filtrate is dried.
Waterglass 5-10 parts；
Caustic soda 3-8 parts；
Glass bead 10-15 parts；
Anhydrous calcium sulphoaluminate, dicalcium silicate and tetra calcium aluminoferrite mixture, weight is than 1: 2: 12-5 part of mixed proportion；
Polyacrylamide 1-1.5 parts；
1-3 parts of PP fibers；
Expanded vermiculite 3-5 parts；
Air entraining agent 5-10 parts；
The air entraining agent can be preferably：Saponins air entraining agent.
Barium metaborate 1-5 parts；
2-5 parts of polysiloxanes powder hydrophober；
Epoxy curing agent 2-5 parts；
Borax 5-10 parts.
Preferably, described flyash is II grades of flyash, and density is 1.94~2.35g/cm3, bulk density is 0.63
~0.75g/cm3, loss on ignition is 5.3~6.1%, water demand ratio 96~103%.
Preferably, described high performance ceramsite by shale powder and dry sludge be sufficiently mixed stir after be made pellet simultaneously
Be placed in drying box and dry 2h, be drawn off, then by preheating, roasting, cooling and obtain, wherein sludge percentage is 30% left side
It is right.
Preferably, described common river sand fineness modulus are 2.89, and bulk density is 1452kg/m3Left and right.
Preferably, described water reducer includes the component of following weight portion：Wherein the concentration of esterification monomer solution be 70~
80%, and its solute is polyethylene glycol monomethyl ethermethacrylic acid esters, cross-linking monomer triethylene glycolbismethyl-acrylate
With the mixture of methyl methacrylate；Unsaturated monomer is methacrylic acid, acrylic acid, hydroxyethyl methacrylate, propylene
Sour hydroxyl ethyl ester, hydroxy propyl methacrylate or hydroxypropyl acrylate.
Preferably, strength grade of concrete reaches LC40, and density rating reaches 1600, and thermal conductivity factor is 0.65W/ (m
K)。
The preparation method of the lightweight aggregate structural concrete described in 1, methods described comprises the following steps：
(1) pre-wetted treatment of haydite light-weight aggregate：Before light aggregate concrete preparation, light-weight aggregate is put into vessel, added
Enough water immersions are gathered materials, and immersion 24 as a child, will be gathered materials and be poured on the constant experiment room floor of humiture, and natural air drying 1~
2h is standby to saturated dry surface.
(2) concrete mixing process：Using premixing Binder Materials mortar method, first by cement, flyash, sand, water reducer
Added with water and be sufficiently stirred in the mixing drum that has soaked, be subsequently adding light-weight aggregate stir about 3min that pre-wetted treatment crosses i.e.
Can.
Beneficial effect
Compared with existing technology, the advantage of the invention is that：
(1) haydite used by is formed by shale and firing sludge, and shale and the good compatibility of sludge both may insure pottery
The performance of grain is conducive to environmental protection again, and the preparation cost of light aggregate concrete can be also reduced to a certain extent.
(2) structure light aggregate concrete of the present invention has strength grade higher, can be used for load-carrying members；With compared with
Low thermal conductivity, for self-heat conserving structural system load-carrying members in, Outside wall average heat conducting modulus can be reduced, can be fundamentally
Improve the heat-insulating property of Building Heat bridge portion, reduce the appearance of dew condensation phenomenon.
Specific embodiment
With reference to embodiments, the present invention is further described in detail, but is not limited to this.
Material selection in embodiment of the present invention is as follows：
Cement：42.5 grades of Portland cements；
Flyash：II grades of flyash is produced in Lanzhou, and density is 2.10g/cm3, bulk density is 0.68g/cm3, loss on ignition is
5.7%, water demand ratio 98.6%.
Haydite：Shale sludge ceramsite prepared by Zhejiang Fangyuan Building Materials Technology Co., Ltd., bulk density 804kg/m3, cylinder pressure
Intensity 14.8MPa, 1h water absorption rate about 9.6%.
Sand：Natural river sand, modulus of fineness is 2.7, and bulk density is 1425kg/m3。
Water reducer：Naphthalene series high-efficiency water-reducing agent.
Water：Drinking water.
Lightweight aggregate concrete formula described in the present embodiment is following (this match ratio)：Cement 350kg/m3, flyash 62kg/
m3, high performance ceramsite 575kg/m3, common river sand 795kg/m3, naphthalene water reducer 3.3kg/m3, water 124kg/m3。
A kind of lightweight aggregate structural concrete, including following raw material：
Cement, flyash, high performance ceramsite, common river sand, water reducer, water；It is former in terms of every cubic metre of lightweight aggregate concrete
Material mixture ratio is constituted as follows：340~382kg of cement, 60~68kg of flyash, high performance ceramsite (after prewetting) 525~630kg,
Common river sand 785~610kg, 3.2~3.6kg of water reducer, 130~140kg of water；
Preferably, described cement is P042.5 Portland cements.
Preferably, the cement is Portland cement, early strength silicate cement, sulphate aluminium cement, sulfuric acid salt solution
One or more in mud, slag cements of mixture.
Preferably, described cement is modified cement, and the meter by weight ratio of the modified cement is as follows：
Attapulgite 20-30 parts；The attapulgite can be preferably attapulgite modified, acidified modified using hydrochloric acid,
Modification procedure is：With 2 moles every liter of HCL and attapulgite, the stirring reaction 10 under 60-63 degrees celsius of solid-to-liquid ratio 1: 4
After minute, after obtaining suspension filtering, filtrate is dried.
Waterglass 5-10 parts；
Caustic soda 3-8 parts；
Glass bead 10-15 parts；
Anhydrous calcium sulphoaluminate, dicalcium silicate and tetra calcium aluminoferrite mixture, weight is than 1: 2: 12-5 part of mixed proportion；
Polyacrylamide 1-1.5 parts；
1-3 parts of PP fibers；
Expanded vermiculite 3-5 parts；
Air entraining agent 5-10 parts；
Barium metaborate 1-5 parts；
2-5 parts of polysiloxanes powder hydrophober；
Epoxy curing agent 2-5 parts；
Borax 5-10 parts.
Preferably, described flyash is II grades of flyash, and density is 1.94~2.35g/cm3, bulk density is 0.63
~0.75g/cm3, loss on ignition is 5.3~6.1%, water demand ratio 96~103%.
Preferably, described high performance ceramsite by shale powder and dry sludge be sufficiently mixed stir after be made pellet simultaneously
Be placed in drying box and dry 2h, be drawn off, then by preheating, roasting, cooling and obtain, wherein sludge percentage is 30% left side
It is right.
Preferably, described common river sand fineness modulus are 2.89, and bulk density is 1452kg/m3Left and right.
Preferably, described water reducer includes the component of following weight portion：Wherein the concentration of esterification monomer solution be 70~
80%, and its solute is polyethylene glycol monomethyl ethermethacrylic acid esters, cross-linking monomer triethylene glycolbismethyl-acrylate
With the mixture of methyl methacrylate；Unsaturated monomer is methacrylic acid, acrylic acid, hydroxyethyl methacrylate, propylene
Sour hydroxyl ethyl ester, hydroxy propyl methacrylate or hydroxypropyl acrylate.
Preferably, strength grade of concrete reaches LC40, and density rating reaches 1600, and thermal conductivity factor is 0.65W/ (m
K)。
The preparation method of the lightweight aggregate structural concrete described in 1, methods described comprises the following steps：
(1) pre-wetted treatment of haydite light-weight aggregate：Before light aggregate concrete preparation, light-weight aggregate is put into vessel, added
Enough water immersions are gathered materials, and immersion 24 as a child, will be gathered materials and be poured on the constant experiment room floor of humiture, and natural air drying 1~
2h is standby to saturated dry surface.
(2) concrete mixing process：Using premixing Binder Materials mortar method, first by cement, flyash, sand, water reducer
Added with water and be sufficiently stirred in the mixing drum that has soaked, be subsequently adding light-weight aggregate stir about 3min that pre-wetted treatment crosses i.e.
Can.
Above-mentioned concrete has been used for beam, plate, post of Zhejiang University's building energy conservation and green building equal-scale laboratory building etc.
In load-carrying members, the laboratory building is using ceramicite-reinforced aerated block, diatomite (porous) insulating brick, sintering heat-reserving brick, sintering page
Rock insulation blocks, 5 kinds of heat insulating wall materials of sand aerated concrete block.After building up, energy consumption monitor in real time is carried out to laboratory building, show this
Self-heat conserving structural system has good heat preservation and energy conservation effects.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
Modified with to the technical scheme described in previous embodiment, or equivalent is carried out to which part technical characteristic；And
These modifications are replaced, and do not make the spirit and model of the essence disengaging embodiment of the present invention technical scheme of appropriate technical solution
Enclose.
Claims (1)
1. a kind of lightweight aggregate structural concrete, it is characterised in that including following raw material：
Cement, flyash, high performance ceramsite, common river sand, water reducer, water；In terms of every cubic metre of lightweight aggregate concrete, raw material
The following composition of proportioning：340~382kg of cement, 60~68kg of flyash, 525~630kg of high performance ceramsite after prewetting, common river
610~785kg of sand, 3.2~3.6kg of water reducer, 130~140kg of water；
Described cement is modified cement, and the meter by weight ratio of the modified cement is as follows：
Attapulgite 20-30 parts；
The attapulgite is attapulgite modified, and acidified modified using hydrochloric acid, modification procedure is：With 2 moles every liter of HCl with
Attapulgite, the stirring reaction under the 60-63 degrees celsius of solid-to-liquid ratio 1: 4 after 10 minutes, after obtaining suspension filtering, will be filtered
Thing dries；
Waterglass 5-10 parts；
Caustic soda 3-8 parts；
Glass bead 10-15 parts；
Anhydrous calcium sulphoaluminate, dicalcium silicate and tetra calcium aluminoferrite mixture, weight is than 1: 2: 12-5 part of mixed proportion；
Polyacrylamide 1-1.5 parts；
1-3 parts of PP fibers；
Expanded vermiculite 3-5 parts；
Air entraining agent 5-10 parts；
Barium metaborate 1-5 parts；
2-5 parts of polysiloxanes powder hydrophober；
Epoxy curing agent 2-5 parts；
Borax 5-10 parts；
Described flyash is II grades of flyash, and density is 1.94~2.35g/cm3, bulk density is 0.63~0.75g/cm3,
Loss on ignition is 5.3~6.1%, water demand ratio 96~103%；
Described high performance ceramsite by shale powder and dry sludge be sufficiently mixed stir after be made pellet and be placed on drying box
In dry 2h, be drawn off, then by preheating, roasting, cooling and obtain, wherein sludge percentage be 30%；
Described common river sand fineness modulus are 2.89, and bulk density is 1452kg/m3；
Described water reducer includes the component of following weight portion：Wherein the concentration of esterification monomer solution is 70~80%, and its is molten
Matter is polyethylene glycol monomethyl ethermethacrylic acid esters, cross-linking monomer triethylene glycolbismethyl-acrylate and metering system
The mixture of sour methyl esters；Unsaturated monomer is methacrylic acid, acrylic acid, hydroxyethyl methacrylate, hydroxy-ethyl acrylate, first
Base hydroxypropyl acrylate or hydroxypropyl acrylate；
The preparation method of described lightweight aggregate structural concrete, step is as follows：
(1) pre-wetted treatment of haydite light-weight aggregate：Before light aggregate concrete preparation, light-weight aggregate is put into vessel, added enough
Water immersion gather materials, soak 24 hours, will gather materials and be poured on the constant experiment room floor of humiture, 1~2h of natural air drying is to full
And surface dry condition, it is standby；
(2) concrete mixing process：Using premixing Binder Materials mortar method, first by cement, flyash, sand, water reducer and water
It is sufficiently stirred in the mixing drum that addition has been soaked, is subsequently adding the light-weight aggregate stirring 3min that pre-wetted treatment is crossed.
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| CN101747006A (en) * | 2009-12-28 | 2010-06-23 | 宁波大学 | High-performance lightweight aggregate concrete |
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