A kind of environmentally friendly high strength cement and its application methodTechnical field
The present invention relates to technical field of concrete production, more specifically to a kind of environmentally friendly high strength cementAnd its application method.
Background technique
Concrete, referred to as " concrete (t ó ng) ": refer to the cementing integral engineered composite material of aggregate by cementitious materialGeneral designation.One word of concrete usually said, which refers to, makees cementitious material, sand, masonry aggregate with cement；With water (additive can be contained and mixedClose material) cooperate by a certain percentage, it is agitated obtained by cement concrete, also referred to as normal concrete, it is widely used in building workJourney can be divided into inorganic coagulation material concrete and organic cementitious material concrete, inorganic coagulation material coagulation according to cementitious materialSoil include the siliceous cementitious material concrete of lime, portland cement series concrete, calcium aluminum water mud series concrete, plaster concrete,Magnesium cement concrete, sulphur concrete, waterglass prodan concrete and betonanc etc., organic cementitious material coagulationSoil mainly has bituminous concrete and polymer cement concrete, resin concrete, polymer impregnated concrete etc..
Existing high strength cement is widely used in the architectural engineering of marine building engineering and salty area, concreteChloride ion has critically important influence to reinforcement corrosion, architectural engineering near ocean and in the architectural engineering of salty area,Under the action of capillary, moisture adsorbs upwards, and constantly evaporates, and leaves salt contained in water, by the accumulation of long period,Salting liquid is concentrated in concrete pore, accelerates chemical attack of the chloride ion to cement, while salt crystallographic expansion in hole,The concrete structure swelling cracking for leading to cement production systD has seriously affected the safety and service life of building.
Summary of the invention
1. technical problems to be solved
Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a kind of environmentally friendly high strength cementsAnd its application method, it may be implemented to change the inside composition of concrete structure, make levigate mineral admixture in concretePortion plays filing effect, promotes concrete structure to become finer and close, reduces the permeability of concrete, to obstruct chloride ion pairThe chemical attack of cement improves the safety and service life of concrete structure.
2. technical solution
To solve the above problems, the present invention adopts the following technical scheme that.
A kind of environmentally friendly high strength cement, its components include sulfate resisting Portland cement, diatomite, mixsAgent, blast-furnace cinder, tailing, volcanic ash and flyash, wherein each constituent is respectively as follows: sulfate resistance silicic acid according to weight accounting45-65 parts of salt cement, 5-15 parts of diatomite, 0.1-0.6 parts of mix agent, 20-45 parts of tailing, 40-60 parts of volcanic ash and flyash5-25 parts, the mix agent constituent includes water-reducing agent and vinal, and the water-reducing agent is according to components by weight percent accountingIt is 0.05-0.15 parts of accounting, vinal is 0.025-0.1 parts according to components by weight percent accounting, may be implemented to change coagulationThe inside of native building forms, and so that levigate mineral admixture is played filing effect in inside concrete, concrete structure is promoted to becomeMust be finer and close, the permeability of concrete is reduced, to obstruct chemical attack of the chloride ion to cement, improves concrete structureSafety and service life.
A kind of environmentally friendly high strength cement, preparation method includes the following steps:
Step 1: sulfate resisting Portland cement, diatomite, volcanic ash and flyash are put by the pre- mix of cement raw materialConcrete mixing blender is set in hopper, and clear water is added, and is started concrete mixing blender, is made cement raw material uniform stirring, is madeObtain pre-composition；
Step 2: water-reducing agent in mix agent and vinal mix by mix agent mixing, use stirring dressIt sets and mixing is stirred to water-reducing agent and vinal；
Step 3: mix adds filler, in mix agent whipping process, by melamine resin and Sodium PolyacrylateAfter mixing, it is added in mix agent, is persistently stirred；
Step 4: mixed mix agent is added in cement premix, and is pressurizeed using steam by pre- thermally homogenising, willThe cement premix of mix agent carries out heating homogeneous；
Step 5: hardened mortar discharges in steam pressure process to chloride ion in mortar, may be implemented to change coagulationThe inside of native building forms, and so that levigate mineral admixture is played filing effect in inside concrete, concrete structure is promoted to becomeMust be finer and close, the permeability of concrete is reduced, to obstruct chemical attack of the chloride ion to cement, improves concrete structureSafety and service life.
Further, during the pre- mix of step 1 cement raw material, flyash, ground slag powder, silicon powder etc. are selectedCementitious material of the mineral admixture as cement.Convenient for making concrete become finer and close, to reduce the permeability of concrete.
Further, what the water-reducing agent in the mix agent was selected is polycarboxylate water-reducer, the vinal choosingIt is the vinylon that specification is 106~115cN/dtex, convenient for enhancing the uniform mixing of cement raw material, increasesStrong homogeneity of cement during reinforced concrete building.
Further, during the step 5 hardened mortar, in high strength cement before use, being corrosive to original bandIngredient and the biggish base soil of permeability, are dug out, and the filler of hand fit is backfilled into foundation pit using the method for excavating replacement.JustIn forming excessive figure layer between concrete construction and aggressive substances, slow down aggressive substances to the shadow of concrete structureIt rings.
Further, it in the step 4 preheating homogenizing process, may be brought into concrete to making in cement raw materialChloride ion content carries out strict control, is sufficiently vibrated in concrete whipping process using vibrator.
Further, during the pre- mix of step 1 cement raw material, concrete is penetrated into during mixing concreteAdditive.Convenient for improving concrete properties, the durability of concrete structure is improved.
Further, it during the step 5 hardened mortar, after chloride ion in mortar is precipitated, needs to surface of reinforced barSpray epoxy can be effectively relieved and reduce the corrosion rate of concrete, have good anti-corrosion effect.Convenient in bar listFace forms fine and close protective layer, in harmful ion intrusion concrete, inhibits, prevents and delay the electrochemistry of steel bar corrosion anti-It answers, to extend the service life of reinforced concrete structure.
Further, after the cement production systD concrete construction, in concrete outer surface cover aggregation object cement mortarWith coating protective coating, convenient for reducing destruction of the ultraviolet light to concrete outer surface protective layer.
Further, after the polymer cement mortar is applied to concrete outer surface, the table on polymer cement mortarFace brushwork epoxy resin.Epoxy coating can be effectively isolated the aggressive substances in environment, make up concrete porousDefect.
3. beneficial effect
Compared with the prior art, the present invention has the advantages that
(1) this programme may be implemented to change the inside composition of concrete structure, make levigate mineral admixture in concreteInside plays filing effect, promotes concrete structure to become finer and close, reduces the permeability of concrete, to obstruct chloride ionChemical attack to cement improves the safety and service life of concrete structure.
(2) during the pre- mix of step 1 cement raw material, the mineral admixtures such as flyash, ground slag powder, silicon powder are selectedCementitious material as cement.Convenient for making concrete become finer and close, to reduce the permeability of concrete.
(3) what the water-reducing agent in mix agent was selected is polycarboxylate water-reducer, and what vinal was selected is that specification is 106The vinylon of~115cN/dtex, convenient for enhancing the uniform mixing of cement raw material, enhancing cement is mixed in reinforcing barSolidifying civil engineering build during homogeneity.
(4) during step 5 hardened mortar, in high strength cement before use, to corrosive elements and infiltration is had originallyProperty biggish base soil, dug out using the method for excavating replacement, and the filler of hand fit is backfilled into foundation pit.Convenient in concreteExcessive figure layer is formed between building and aggressive substances, slows down influence of the aggressive substances to concrete structure.
(5) in step 4 preheating homogenizing process, to the chloride ion content that may be brought into production cement raw material in concreteStrict control is carried out, is sufficiently vibrated in concrete whipping process using vibrator.
(6) during the pre- mix of step 1 cement raw material, concrete admixture is penetrated into during mixing concrete.It is convenient forImprove concrete properties, improves the durability of concrete structure.
(7) it during step 5 hardened mortar, after chloride ion in mortar is precipitated, needs to spray asphalt mixtures modified by epoxy resin to surface of reinforced barRouge can be effectively relieved and reduce the corrosion rate of concrete, have good anti-corrosion effect.Convenient for forming densification in rebar surfaceProtective layer, when harmful ion intrusion concrete in, inhibit, prevent and delay the electrochemical reaction of steel bar corrosion, to extendThe service life of reinforced concrete structure.
(8) after cement production systD concrete construction, in concrete outer surface cover aggregation object cement mortar and coating protectionCoating, convenient for reducing destruction of the ultraviolet light to concrete outer surface protective layer.
(9) after polymer cement mortar is applied to concrete outer surface, in polymer cement mortar upper surface brushing epoxyResin.Epoxy coating can be effectively isolated the aggressive substances in environment, make up the defect of concrete porous.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, completeSite preparation description；Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments, is based onEmbodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every otherEmbodiment shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the instruction such as term " on ", "lower", "inner", "outside", " top/bottom end "Orientation or positional relationship be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the present invention and simplification retouchIt states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation,Therefore it is not considered as limiting the invention.In addition, term " first ", " second " are used for description purposes only, and cannot understandFor indication or suggestion relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation " " is setBe equipped with ", " be arranged/connect ", " connection " etc., shall be understood in a broad sense, such as " connection ", may be a fixed connection, be also possible to removableConnection is unloaded, or is integrally connected, can be mechanical connection, is also possible to be electrically connected, can be directly connected, it can also be inBetween medium be indirectly connected, can be the connection inside two elements, for the ordinary skill in the art, can be specificSituation understands the concrete meaning of above-mentioned term in the present invention.
Embodiment 1:
Referring to Fig. 1, a kind of environmentally friendly high strength cement, its components include sulfate resisting Portland cement,Diatomite, mix agent, blast-furnace cinder, tailing, volcanic ash and flyash, wherein each constituent is respectively as follows: according to weight accounting45-65 parts of sulfate resisting Portland cement, 5-15 parts of diatomite, 0.1-0.6 parts of mix agent, 20-45 parts of tailing, volcanic ash 40-60 parts and flyash 5-25 parts, mix agent constituent includes water-reducing agent and vinal, and water-reducing agent is according to components by weight percentAccounting is accounting 0.05-0.15 parts, and vinal is 0.025-0.1 parts according to components by weight percent accounting, subtracting in mix agentWhat aqua was selected is polycarboxylate water-reducer, and what vinal was selected is the polyvinyl alcohol that specification is 106~115cN/dtexFormal fiber enhances homogeneity of cement during reinforced concrete building convenient for enhancing the uniform mixing of cement raw material,The inside that may be implemented to change concrete structure forms, and levigate mineral admixture is made to play filing effect in inside concrete,Promote concrete structure to become finer and close, reduces the permeability of concrete, so that chemical attack of the chloride ion to cement is obstructed,Improve the safety and service life of concrete structure.
A kind of environmentally friendly high strength cement, preparation method includes the following steps:
Step 1: sulfate resisting Portland cement, diatomite, volcanic ash and flyash are put by the pre- mix of cement raw materialConcrete mixing blender is set in hopper, and clear water is added, and is started concrete mixing blender, is made cement raw material uniform stirring, is madePre-composition, during the pre- mix of step 1 cement raw material, penetrate into concrete admixture during mixing concrete.Convenient for changingKind concrete properties, improve the durability of concrete structure, during the pre- mix of step 1 cement raw material, select flyash, millThe cementitious materials of the mineral admixtures as cement such as thin slag powders, silicon powder.Convenient for making concrete become finer and close, to reduceThe permeability of concrete；
Step 2: water-reducing agent in mix agent and vinal mix by mix agent mixing, use stirring dressIt sets and mixing is stirred to water-reducing agent and vinal；
Step 3: mix adds filler, in mix agent whipping process, by melamine resin and Sodium PolyacrylateAfter mixing, it is added in mix agent, is persistently stirred；
Step 4: mixed mix agent is added in cement premix, and is pressurizeed using steam by pre- thermally homogenising, willThe cement premix of mix agent carries out heating homogeneous, and step 4 preheats in homogenizing process, may bring into making in cement raw materialChloride ion content in concrete carries out strict control, is sufficiently vibrated in concrete whipping process using vibrator；
Step 5: hardened mortar discharges in steam pressure process to chloride ion in mortar, step 5 hardened mortar mistakeCheng Zhong, in high strength cement before use, to corrosive elements and the biggish base soil of permeability, excavation replacement is used originallyMethod is dug out, and the filler of hand fit is backfilled into foundation pit.Convenient for being formed between concrete construction and aggressive substancesFigure layer is spent, influence of the aggressive substances to concrete structure is slowed down, the inside composition for changing concrete structure may be implemented,So that levigate mineral admixture is played filing effect in inside concrete, concrete structure is promoted to become finer and close, reduces coagulationThe permeability of soil improves the safety and service life of concrete structure to obstruct chemical attack of the chloride ion to cement.
During step 5 hardened mortar, after chloride ion in mortar is precipitated, need to surface of reinforced bar spray epoxy,It can be effectively relieved and be reduced the corrosion rate of concrete, there is good anti-corrosion effect.Convenient for forming densification in rebar surfaceProtective layer in harmful ion intrusion concrete, inhibits, prevents and delays the electrochemical reaction of steel bar corrosion, to extend steelThe service life of tendon concrete structure.
After cement production systD concrete construction, applied in concrete outer surface cover aggregation object cement mortar and coating protectionMaterial, convenient for reducing destruction of the ultraviolet light to concrete outer surface protective layer, polymer cement mortar is applied to concrete outer surfaceAfterwards, in polymer cement mortar upper surface brushwork epoxy resin.Epoxy coating can be effectively isolated the aggressivity in environmentSubstance makes up the defect of concrete porous.
The present invention is by being convenient for reducing purple in concrete outer surface cover aggregation object cement mortar and coating protective coatingDestruction of the outside line to concrete outer surface protective layer, after polymer cement mortar is applied to concrete outer surface, in polymer waterCement mortar upper surface brushwork epoxy resin.Epoxy coating can be effectively isolated the aggressive substances in environment, make up coagulationThe porous defect of soil may be implemented the inside composition for changing concrete structure, make levigate mineral admixture in concretePortion plays filing effect, promotes concrete structure to become finer and close, reduces the permeability of concrete, to obstruct chloride ion pairThe chemical attack of cement improves the safety and service life of concrete structure.
The foregoing is intended to be a preferred embodiment of the present invention；But scope of protection of the present invention is not limited thereto.Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and itsIt improves design and is subject to equivalent substitution or change, should be covered by the scope of protection of the present invention.