CN103482904A - Modified epoxy mortar abrasion-resistant patching material - Google Patents
Modified epoxy mortar abrasion-resistant patching material Download PDFInfo
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- CN103482904A CN103482904A CN201310413242.9A CN201310413242A CN103482904A CN 103482904 A CN103482904 A CN 103482904A CN 201310413242 A CN201310413242 A CN 201310413242A CN 103482904 A CN103482904 A CN 103482904A
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Abstract
The invention relates to a modified epoxy mortar abrasion-resistant patching material which comprises a component A and a component B. The mass ratio of the A component and the B component is 4:1. The A component comprises, by weight, 15-20 parts of epoxy resin, 1.5-2 parts of flexibilizer, 1.5-3 parts of reactive diluent and 75-82 parts of abrasive aggregates. The B component comprises, by weight, 18-24 parts of hardening agent, 1-1.5 parts of coupling agent and 75-80 parts of abrasive aggregates. The abrasive aggregates are quartz-sand-class aggregates or diamond-sand-class aggregates. The mass ratio of aggregates with the particle diameter of 10-20 meshes to aggregates with the particle diameter of 20-40 meshes to aggreates with the particel diameter of 40-70 to aggreates with the particel diameter of 100-200 meshes is 0-1 to 1-2 to 0-2 to 0-1. The hardening agent is a polyether amine hardening agent. According to the modified epoxy mortar abrasion-resistant patching material, the abrasion-resistant strength and the anti-impact strength are improved, the hardening reaction speed is lowered and micro cracks in the early stage of epoxy mortar are avoided.
Description
Technical field
The present invention relates to a kind of concrete anti-abrasion patching material, be specifically related to a kind of modified epoxy mortar anti-impact mill patching material, be applicable to improve anti-impact mill and the resistance to impact shock of epoxy mortar.
Background technology
In recent years, enforcement along with development of the West Regions and transferring electricity from the west to the east development strategy, China has built a collection of large-scale high-head power station, its earial drainage flow velocity all reaches 40-50m/s, the earial drainage head surpasses 150m, and high-velocity sediment-laden flow is bad to the concrete punching worn-off of hydraulic structure flow-passing surface is construction of hydropower plant and operating knotty problem.High-velocity & sediment-laden flow causes top layer concrete big area to be degraded to erosive wear, the cavitation corrosion effect meeting of hydraulic concrete buildings flow-passing surface, and serious initiation catastrophic failure occurs, and therefore always enjoys attention.Splitting resistance, anti-impact mill ability and quick easy act etc. to anti-impact mill material are all had higher requirement.
Abrasion and destruction and maintenance to the ultrahigh-water head current, the research of Chinese scholars existing decades of history, related anti-impact mill description of materials is a lot, as steel plate, glass cermaic plate, cast iron plate lining protect, different modes is buried rail pointing silicon powder concrete, fiber reinforced concrete, resin slurry (resin used has epoxy and modified epoxy, furane resin and other macromolecular material), sprayed concrete, silicon powder concrete, flyash anti-impact grinding concrete etc. again underground.Since the 60's of 20th century, domestic once by epoxy resin, furane resin, acrylate resin, unsaturated polyester resin mortar etc., for hydraulic structure is anti-, containing rushing of sand current, gall bad, wherein better with the epoxy mortar effect, more with obtaining, also using up to now.From the experience of prolonged application, people recognize; the high water head current to after the washing away, denude and destroy of hydraulic structure; patching material can not be pursued high strength simply; and should improve the toughness of material; improve the ability of its opposing temperature, humidity variation; improve its cohesive force to substrate concrete etc., make it become the anti-high velocity flow punching of concrete surface and gall bad protective layer.
Chinese patent: application publication number is CN101423358A, the patent of invention that open day is on May 6th, 2009 discloses a kind of preparation method of high impact resistant epoxy resin mortar, in this preparation method, the raw material of A component comprises polyurethane modified epoxy resin, quartz sand, thinner, softening agent, and the coarse sand that quartz sand is 0.5～3mm by particle diameter and particle diameter mix by a certain percentage at 80～400 purpose fine sands, the raw material of B component comprises the room temperature amine curing agent, quartz sand, thinner, and the room temperature amine curing agent is diethylenetriamine, triethylene tetramine or low molecular polyamides.Although the cured article that this invention makes has good resistance to compression, shearing resistance and resistance to impact shock, still have following defect:
1, the coarse sand of selecting in this invention and the grain diameter of fine sand differ greatly, coarse sand particularly, its particle diameter has reached 0.5～3mm, and the epoxy mortar made is not easy to apply smooth in construction process, the bonding base-material is poor to the covered effect of quartz sand, thereby affects the etch resistant properties of epoxy mortar;
2, this invention is usingd diethylenetriamine, triethylene tetramine or low molecular polyamides as solidifying agent, and the use of such solidifying agent can cause curing reaction wayward because of excessive velocities, thereby construction is made troubles.
Summary of the invention
The objective of the invention is to overcome the excessive problem that affects etch resistant properties, curing reaction excessive velocities of the aggregate size existed in prior art, provide a kind of aggregate size moderate and can effectively reduce the modified epoxy mortar anti-impact mill patching material of curing reaction speed.
For realizing above purpose, the invention provides following technical scheme:
A kind of modified epoxy mortar anti-impact mill patching material, this patching material comprises A component, B component, the mass ratio of described A component and B component is 4: 1;
The composition of described A component and weight ratio thereof are: epoxy resin 15～20, toughner 1.5～2, reactive thinner 1.5～3, abrasive aggregates 75～82;
The composition of described B component and weight ratio thereof are: solidifying agent 18～24, coupling agent 1～1.5, abrasive aggregates 75～80;
Described abrasive aggregates is quartz sand graduation aggregate or silicon carbide graded aggregate, and the particle diameter of described quartz sand graduation aggregate or silicon carbide graded aggregate forms and mass ratio is 10～20 orders: 20～40 orders: 40～70 orders: 100～200 orders=0～1: 1～2: 0～2: 0～1.
Described solidifying agent is the polyether monoamine solidifying agent.
Described solidifying agent is polyetheramine solidifying agent T-403 or polyetheramine solidifying agent D-230.
Described epoxy resin is bisphenol A-type E44 epoxy resin or bisphenol A-type E51 epoxy resin.
Described toughner is liquid polysulfide rubber, liquid acrylonitrile butadiene rubber or liquid styrene butadiene rubber.
Described reactive thinner is one or more in benzyl glycidyl ether, butylglycidyl ether, glycidyl allyl ether.
Described coupling agent is APTES.
Compared with prior art, beneficial effect of the present invention is:
1, in a kind of modified epoxy mortar of the present invention anti-impact mill patching material, abrasive aggregates is quartz sand graduation aggregate or silicon carbide graded aggregate, and the particle diameter of quartz sand graduation aggregate or silicon carbide graded aggregate forms and weight ratio is 10～20 orders: 20～40 orders: 40～70 orders: 100～200 orders=0～1: 1～2: 0～2: 0～1, on the one hand, the present invention adopts Young's modulus high, hardness is large, wear-resisting quartz sand or silicon carbide also carry out good grating, anti-impact mill intensity and the resistance to impact shock of epoxy mortar have been significantly improved, on the other hand, the particle diameter of aggregate used is moderate, the bonding base-material is better to its covered effect, can effectively avoid causing too greatly because of aggregate size the abrasion resistance that the etch resistant properties of epoxy mortar is lower and affect epoxy mortar because aggregate size is too little, simultaneously, the present invention has adopted the aggregate of four kinds of different-grain diameters, can need to be regulated composition and the ratio of these aggregates according to intensity, use range is wider.Therefore, the present invention has not only improved anti-impact mill intensity and resistance to impact shock, and has avoided because aggregate size affects etch resistant properties too greatly, and use range is wider.
2, the solidifying agent of selecting in a kind of modified epoxy mortar of the present invention anti-impact mill patching material is the polyether monoamine solidifying agent, after such solidifying agent solidifies, system reaction heat is lower, curing reaction speed is slower, the presetting period of epoxy resin cure is longer, can effectively reduce exothermic heat of reaction peak and the original volume cure shrinkage of curing system, avoid the appearance of the early stage tiny crack of epoxy mortar.Therefore, the present invention can reduce curing reaction speed, avoid the appearance of the early stage tiny crack of epoxy mortar.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated.
A kind of modified epoxy mortar anti-impact mill patching material, this patching material comprises A component, B component, the mass ratio of described A component and B component is 4: 1;
The composition of described A component and weight ratio thereof are: epoxy resin 15～20, toughner 1.5～2, reactive thinner 1.5～3, abrasive aggregates 75～82;
The composition of described B component and weight ratio thereof are: solidifying agent 18～24, coupling agent 1～1.5, abrasive aggregates 75～80;
Described abrasive aggregates is quartz sand graduation aggregate or silicon carbide graded aggregate, and the particle diameter of described quartz sand graduation aggregate or silicon carbide graded aggregate forms and mass ratio is 10～20 orders: 20～40 orders: 40～70 orders: 100～200 orders=0～1: 1～2: 0～2: 0～1.
Described solidifying agent is the polyether monoamine solidifying agent.
Described solidifying agent is polyetheramine solidifying agent T-403 or polyetheramine solidifying agent D-230.
Described epoxy resin is bisphenol A-type E44 epoxy resin or bisphenol A-type E51 epoxy resin.
Described toughner is liquid polysulfide rubber, liquid acrylonitrile butadiene rubber or liquid styrene butadiene rubber.
Described reactive thinner is one or more in benzyl glycidyl ether, butylglycidyl ether, glycidyl allyl ether.
Described coupling agent is APTES.
Principle of the present invention is described as follows:
The present invention be take the polyether monoamine solidifying agent of low viscous modified epoxy, low reaction heat and is the bonding base-material, take rubber elastomer as toughened system, the high-wearing feature aggregate of certain grating of take is filler aggregate, be aided with multiple auxiliary agent, obtained having the modified epoxy mortar anti-impact mill patching material of high compressive strength, high bond strength, high-impact-resistance wear-resistant, snappiness and toughness, high impact resistance.
Epoxy resin: the present invention has adopted low viscous snappiness modified epoxy (bisphenol A-type E44 epoxy resin or bisphenol A-type E51 epoxy resin), it can carry out rational reduction to hard section in polymer molecular structure and soft section when preparing epoxy resin, thereby make cured article not only there is good adhesive property, chemical mediator-resitant property, also there is high tenacity and high-elongation.
Solidifying agent: the solidifying agent that the present invention selects is the polyether monoamine solidifying agent, after such solidifying agent solidifies, system reaction heat is lower, curing reaction speed is slower, the presetting period of epoxy resin cure is longer, can effectively reduce exothermic heat of reaction peak and the original volume cure shrinkage of curing system, avoid the appearance of the early stage tiny crack of epoxy mortar, and without using curing catalyst.
Toughner: the present invention is by liquid polysulfide rubber, liquid acrylonitrile butadiene rubber or liquid styrene butadiene rubber join the epoxy curing agent system as toughner, in solidification process, toughner can form spheroidal particle, form disperse phase in cross linking of epoxy resin network external phase, form " island structure ", when being subject at a high speed containing the sand current scour, impacting, under the comprehensive action of friction and cutting force, on the one hand, this consumes energy the particle of toughner in material cracking process, on the other hand, " island structure " transferred the epoxy resin molecular network and has been orientated, stretch, distortion, many power consumption processes such as cavityization and generation tiny crack, avoided the destruction of material, thereby the fracture toughness property of material is increased, improved the anti-impact mill performance of material.
Abrasive aggregates: the present invention selects Young's modulus high, hardness is large, wear-resisting quartz sand or silicon carbide also carry out good grating, anti-impact mill intensity and the resistance to impact shock of epoxy mortar have been significantly improved, wherein, the particle diameter of quartz sand graduation aggregate or silicon carbide graded aggregate forms and weight ratio is 10～20 orders: 20～40 orders: 40～70 orders: 100～200 orders=0～1: 1～2: 0～2: 0～1, due to the particle diameter of quartz sand graduation aggregate or silicon carbide graded aggregate all between 10～200 orders, granularity is moderate, therefore can not affect etch resistant properties and the abrasion resistance of epoxy mortar, simultaneously, the present invention has selected 10～20 orders, 20～40 orders, 40～70 orders, the aggregate of these four kinds of different-grain diameters of 100～200 orders, can need to be regulated composition and the ratio of this aggregate according to actual intensity, use range is wider.
Embodiment 1:
A kind of modified epoxy mortar anti-impact mill patching material, this patching material comprises the A component, the B component, and the weight ratio of A component and B component is 4: 1, described A component composition and weight ratio thereof be: epoxy resin 20, toughner 2, reactive thinner 3, abrasive aggregates 75, the composition of described B component and weight ratio thereof are: solidifying agent 24, coupling agent 1, abrasive aggregates 75, wherein, described solidifying agent is polyetheramine solidifying agent T-403, described abrasive aggregates is the quartz sand graduation aggregate, the particle diameter of this aggregate forms and weight ratio is 10～20 orders: 20～40 orders: 40～70 orders: 100～200 orders=1: 2: 2: 1, described epoxy resin is bisphenol A-type E44 epoxy resin or bisphenol A-type E51 epoxy resin, described toughner is liquid polysulfide rubber, liquid acrylonitrile butadiene rubber or liquid styrene butadiene rubber, described reactive thinner is benzyl glycidyl ether, butylglycidyl ether, one or more in glycidyl allyl ether, described coupling agent is APTES,
The preparation method of above-mentioned modified epoxy mortar anti-impact mill patching material comprises the following steps successively:
The preparation of A component: after epoxy resin and toughner, reactive thinner are stirred in required ratio, add abrasive aggregates, stir, obtain the A component;
The preparation of B component: after solidifying agent, coupling agent are stirred in required ratio, add abrasive aggregates, stir, obtain the B component;
The preparation of modified epoxy mortar anti-impact mill patching material: A component, B component are mixed in required ratio, can obtain modified epoxy mortar anti-impact mill patching material.
The modified epoxy mortar anti-impact mill patching material made carries out Mechanics Performance Testing with reference to " epoxy resin mortar technical regulation " DL/T5193-2004, result shows, tensile strength>=10.0MPa, ultimate compression strength>=90.0MPa, bending strength>=30.0MPa, with concrete adhesive tensile resistance intensity>=2.5MPa, punching mill intensity 3.563h/(g/cm
2), resistance to impact shock 32.4MPa.
Embodiment 2:
Step is with embodiment 1, different is, described A component composition and weight ratio thereof be: epoxy resin 15, toughner 1.5, reactive thinner 1.5, abrasive aggregates 82, the composition of described B component and weight ratio thereof are: solidifying agent 24, coupling agent 1, abrasive aggregates 75, wherein, described abrasive aggregates is the quartz sand graduation aggregate, and the particle diameter of this aggregate forms and weight ratio is 10～20 orders: 20～40 orders: 40～70 orders=1: 2: 1.
The modified epoxy mortar anti-impact mill patching material made carries out Mechanics Performance Testing with reference to " epoxy resin mortar technical regulation " DL/T5193-2004, result shows, tensile strength>=10.0MPa, ultimate compression strength>=90.0MPa, bending strength>=30.0MPa, with concrete adhesive tensile resistance intensity>=2.5MPa, punching mill intensity 3.863h/(g/cm
2), resistance to impact shock 39.8MPa.
Embodiment 3:
Step is with embodiment 1, different is, described A component composition and weight ratio thereof be: epoxy resin 15, toughner 1.5, reactive thinner 1.5, abrasive aggregates 85, the composition of described B component and weight ratio thereof are: solidifying agent 18, coupling agent 1.5, abrasive aggregates 80.5, wherein, described solidifying agent is polyetheramine solidifying agent D-230, described abrasive aggregates is the silicon carbide graded aggregate, and the particle diameter of this aggregate forms and weight ratio is 10～20 orders: 20～40 orders: 40～70 orders=1: 1: 2.
The modified epoxy mortar anti-impact mill patching material made carries out Mechanics Performance Testing with reference to " epoxy resin mortar technical regulation " DL/T5193-2004, result shows, tensile strength>=10.0MPa, ultimate compression strength>=90.0MPa, bending strength>=30.0MPa, with concrete adhesive tensile resistance intensity>=2.5MPa, punching mill intensity 3.274h/(g/cm
2), resistance to impact shock 36.5MPa.
Claims (7)
1. a modified epoxy mortar anti-impact is ground patching material, it is characterized in that:
This patching material comprises A component, B component, and the mass ratio of described A component and B component is 4: 1;
The composition of described A component and weight ratio thereof are: epoxy resin 15～20, toughner 1.5～2, reactive thinner 1.5～3, abrasive aggregates 75～82;
The composition of described B component and weight ratio thereof are: solidifying agent 18～24, coupling agent 1～1.5, abrasive aggregates 75～80;
Described abrasive aggregates is quartz sand graduation aggregate or silicon carbide graded aggregate, and the particle diameter of described quartz sand graduation aggregate or silicon carbide graded aggregate forms and mass ratio is 10～20 orders: 20～40 orders: 40～70 orders: 100～200 orders=0～1: 1～2: 0～2: 0～1.
2. a kind of modified epoxy mortar anti-impact according to claim 1 is ground patching material, and it is characterized in that: described solidifying agent is the polyether monoamine solidifying agent.
3. a kind of modified epoxy mortar anti-impact according to claim 2 is ground patching material, and it is characterized in that: described solidifying agent is polyetheramine solidifying agent T-403 or polyetheramine solidifying agent D-230.
4. a kind of modified epoxy mortar anti-impact according to claim 1 is ground patching material, and it is characterized in that: described epoxy resin is bisphenol A-type E44 epoxy resin or bisphenol A-type E51 epoxy resin.
5. a kind of modified epoxy mortar anti-impact according to claim 1 is ground patching material, and it is characterized in that: described toughner is liquid polysulfide rubber, liquid acrylonitrile butadiene rubber or liquid styrene butadiene rubber.
6. a kind of modified epoxy mortar anti-impact according to claim 1 is ground patching material, and it is characterized in that: described reactive thinner is one or more in benzyl glycidyl ether, butylglycidyl ether, glycidyl allyl ether.
7. a kind of modified epoxy mortar anti-impact according to claim 1 is ground patching material, and it is characterized in that: described coupling agent is APTES.
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