CN105837137A - Composite reinforcing type mortar for rapid repairing - Google Patents

Composite reinforcing type mortar for rapid repairing Download PDF

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Publication number
CN105837137A
CN105837137A CN201610216648.1A CN201610216648A CN105837137A CN 105837137 A CN105837137 A CN 105837137A CN 201610216648 A CN201610216648 A CN 201610216648A CN 105837137 A CN105837137 A CN 105837137A
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Prior art keywords
mortar
composite enhanced
mass
patching
enhanced rapid
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CN201610216648.1A
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Chinese (zh)
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CN105837137B (en
Inventor
黄赟
郑俊杰
水中和
郑又瑞
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武汉理工大学
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/06Aluminous cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/10Coating or impregnating
    • C04B20/1018Coating or impregnating with organic materials
    • C04B20/1029Macromolecular compounds
    • C04B20/1033Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/10Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Abstract

The invention relates to composite reinforcing type mortar for rapid repairing. The composite reinforcing type mortar is prepared by mixing dry materials with water to obtain mortar, and mixing with modified fibers accounting for 0.5-2% by volume of the mortar. The dry materials comprise 30-50% by mass of sulphate aluminium cement, 2-10% by mass of superfine limestone flour, 2-10% by mass of metakaolin, 0.5-2% by mass of redispersible emulsion powder, 0.1-0.4% by mass of sodium gluconate, 0.2-0.6% by mass of a water reducing agent, 0.1-0.6% by mass of a defoamer and 30-65% by mass of sand, with the sum of the masses of the components being 100%. The composite reinforcing type mortar improves the acting force between interfaces of old concrete and new concrete and has good repairing effects for concrete pavements, and the like.

Description

A kind of composite enhanced rapid-patching motar
Technical field
The invention belongs to building material technical field, relate to a kind of composite enhanced Rapid-Repair sand Slurry.
Background technology
Concrete construction is simple, good in economic efficiency owing to having intensity height, good endurance, construction Etc. advantage, in nearest decades, obtain swift and violent development, made for modernization economic construction Tremendous contribution.But due to the defect of cement concrete itself, the erosion of environment and artificial breaking Bad, along with the years are accumulated, in part concrete construction, occur in that crackle, burn into freeze thawing are broken The serious problems such as evil idea and alkali-aggregate reaction, the safety of serious threat structure.Make a general survey of the whole world to build Build industry development process, it can be clearly seen that, after experienced by building peak period, come one after another Substantial amounts of cement concrete repairing work.Although Building Trade in China is at present on the occasion of peak period, due to Construction quality problem is relatively universal, and concrete repair industry also begins to quietly rise.
For concrete road surface Common Diseases, the most also there are some patching materials, but these are repaiied Mend material and more or less face these several defects following: (1) patching material is expensive: wherein Polymerization species patching material such as epoxy resin, phenolic aldehyde and modified phenolic resin lipid, adhesive gather Ammoniacum class, alkenes, rubber-like, Colophonium class adhesive price are sufficiently expensive, and being difficult to large area should With;(2) poor durability: special cement class patching material later strength has retraction and occurs, also Wear no resistance, the problem such as linking new and old concrete poor-performing, and be polymerized species and repair road surface Poor durability, the ageing properties such as water-fast, hot, light is uneven, is frequently used less than 2 years, Just there is decortication phenomenon in road surface;(3) curing time is uneven: concrete road surface degree of disease Difference, patching material and the curing time of needs are the most different, and thin layer disease often degree is relatively Shallow, need Rapid-Repair in the case of not affecting traffic, and deep layer large area disease needs low The patching material of the quick open to traffic of cost, and existing patching material needs longer maintenance mostly Time is longer, does not also account for pavement disease type, public to particularly airport, road surface or high speed Road pavement patching brings very big inconvenience;(4) interfacial adhesion between New-old concrete: repair Mending failed reason, the overwhelming majority is because new-old concrete (mortar) and comes off at interface and lead Causing to repair unsuccessfully, (100-200 μm) transition zone of new-old concrete or mortar is bonding interface Weak floor, this layer is rich in the thick crystalline substance of pore, crack, moisture film and entringite and calcium hydroxide Body, and this crystal intensity is poor, is to repair the big key factor lost efficacy.Therefore, research system Standby a kind of fast rapid hardening firmly and not, early strength is high, it is durable to cohere, have microdilatancy characteristic, soft The strong composite enhanced rapid-patching motar of toughness is highly significant.
Summary of the invention
The technical problem to be solved is for above-mentioned deficiency present in prior art, There is provided a kind of composite enhanced rapid-patching motar, this mending mortar rapid hardening the most firmly and not, in early days Intensity is high, it is durable to cohere, have microdilatancy characteristic, pliability is strong.
For solving above-mentioned technical problem, present invention provide the technical scheme that
Thering is provided a kind of composite enhanced rapid-patching motar, first it be mixed to get with water by siccative Mortar, then mix and account for the modified fibre of mortar volume 0.5-2% and obtain;
Raw material and the quality proportioning of described siccative be: sulphate aluminium cement 30-50%, ultra-fine Calx Stone powder 2-10%, metakaolin 2-10%, redispersible latex powder 0.5-2%, sodium gluconate 0.1-0.4%, water reducer 0.2-0.6%, defoamer 0.1-0.6%, sand 30-65%, each component Quality sum is 100%.
By such scheme, the preparation method of described modified fibre is: be 2-8mm by average length Chopped fiber and average a length of 12-22mm long fibre mixing, 2:1-1:2 in mass ratio is equal Even mixing, is then placed in VAE emulsion infiltration 1-5 minute, then is dried to obtain modified fibre.
By such scheme, described VAE emulsion (vinyl copolymer emulsion) is solid Content is 20-60%.
Preferably, described siccative and water quality are than for 1:0.25-0.35.
By such scheme, described water reducer is Polycarboxylic Superplasticizer.
Preferably, defoamer is the AGITANR P803 type that German bright icepro Chemical Group produces Defoamer.
By such scheme, described sand is fluvial sand, and its modulus of fineness is 0.7-2.2.
Preferably, described sand modulus of fineness is 0.7-1.2.
The beneficial effects of the present invention is: compared with existing patching material, of the present invention repair Stop-off slurry is main with sulphate aluminium cement as Binder Materials, and the main aquation of sulphate aluminium cement is produced Thing is entringite and aluminium glue, and the entringite wherein with bulking effect can fill old concrete table The capillary gap in face, the mechanical snap power making interface is bigger, owing to can produce expansive force, makes slurry Internal portion produces compressive pre-stress, compensates inside slurry due to the produced shrinkage stress of solidification, subtracts Few desciccation crack;Additionally, due to powerful feature morning of sulphate aluminium cement, just can reach in early stage Higher intensity and metastable elastic modelling quantity so that the fiber in patching material and cement based Between active force will not As time goes on decay, and by the fibre of surface modification treatment Tie up owing to the acid film forming matter on its surface can reduce the adhesion with cement-based material, make sand Slurry is when being damaged, and what fiber presented is the effect of sliding-dispel-type, the guided modes in this crack Formula can improve fiber utilization rate in mortar, and dispersion delivers load subjected to active force, The toughness of mortar is greatly improved, reduces and directly act on the active force on the old and new interface, and logical Cross and mix various sizes of fiber, the anti-drying shrinkage of mortar can be improved further, reduce volume and receive The effect of contracting.Compare than common portland cement, sulphate aluminium cement also have compact structure, The advantages such as good corrosion resistance.
Appropriate agstone and metakaolin is mixed, its differential effect and micro-in patching material Effect of gathering materials can accelerate the aquation of cement, refines crystal structure, fills loose porous weakness Transition region, adds the Van der Waals force between interface and mechanical snap power.In super-fine limestone powder Active CaCO3The water that structure is more stable can be formed with the hydrated product of sulphate aluminium cement Changing carbon calcium aluminate, structural stability and durability for patching material are all very helpful. The addition of water reducer can reduce the ratio of mud of system, improves fluidity, closely knit pore structure, carries The durability in high later stage.The addition of defoamer can reduce the polymer because being mixed and cause High porosity, the structure at closely knit interface.The addition of sodium gluconate can regulate the condensation of mortar Time, and little on later strength impact, corresponding volume can be adjusted according to the requirement of construction.
System adds and can mainly have two reasons in dispersibility latex powder: 1, can be in dispersion Property latex powder permeate in old concrete matrix space, filling concrete granule, parcel cement water Change product, form the mechanism that polymer and Behavior of Hardened Cement Paste are mutually filled, increase mechanical snap power and Van der Waals force, 2, polymer there is water-retaining property, can the surface of abundant moistening old concrete, make Hydrated cementitious is abundant, generates more hydrated product and is filled in the space of old concrete, it is ensured that Mechanics symbiosis between the old and new interface.
In sum, the composite enhanced rapid-patching motar of the present invention improves New-old concrete circle Active force between face, first passes through the dilatancy of sulphate aluminium cement, the aggregating into of polymer The effect such as film effect improves the mechanical snap power between new-old concrete and Van der Waals force, increases Original bond intensity under non-load;Secondly as the high tenacity of material, can make to be subject to Load be distributed in whole system, reduce and repair the power being subject on interface, indirectly improve The interaction of new-to-old concrete interface, good to repair efficiencies such as concrete road surfaces.With market Upper sales volume preferable TD-1 polymer mending mortar is compared, and composite enhanced rapid-patching motar resists Folding intensity raising reaches 40%, and bend-press ratio raising reaches 35%, and the raising of tension adhesion strength reaches 80%, anti- The raising of folded knotting strength reaches 75%, shrinks and is reduced to the 35% of commercially available prod.This mortar visible is significantly Improve the adhesion strength of patching material and the toughness of mending mortar.
Detailed description of the invention
For making those skilled in the art be more fully understood that technical scheme, below in conjunction with reality Execute example the present invention is described in further detail.
Chemical admixture used in following instance: redispersible latex powder is that Shanghai shadow is good The TS606 type latex powder that industry development company limited produces, water reducer is Jiangsu Su Bote green wood The PCA high-efficiency water-reducing agent of poly-carboxylic acid that material limited company produces, defoamer is the bright iceproization of Germany Work group produces, and model is AGITANR P803.
Comparative example 1
Commercially available TD-1 waterproof polymer mortar, its test result is as shown in table 1.
Table 1
Embodiment 1
The siccative quality proportioning of composite enhanced rapid-patching motar is: sulphate aluminium cement 38%, Super-fine limestone powder 5%, metakaolin 5%, redispersible latex powder 1%, sodium gluconate 0.2%, water reducer 0.5%, defoamer 0.3%, sand (modulus of fineness is 1.2) 50%.
Above-mentioned siccative is mixed to get mortar with water by the ratio of mud 0.3, then incorporation accounts for mortar volume The modified fibre of 0.5% obtains composite enhanced rapid-patching motar.The wherein preparation of modified fibre Method is: the polypropylene fibre 1:1 in mass ratio that average length is respectively 6mm and 12mm mixes Close, be then placed in VAE emulsion (solid content is 40%) infiltration 2 minutes, then be placed in temperature and be 20 DEG C of environment are dried 10min and obtain modified fibre.
The composite enhanced rapid-patching motar performance test of the present embodiment gained is as shown in table 2.
Table 2
As known from Table 2, relative to comparative example 1, prepared by the present embodiment composite enhanced soon Speed mending mortar rupture strength improves 38.62%, and bend-press ratio improves 36.57%, and tension bonds Intensity improves 78.02%, and anti-folded knotting strength improves 71.87%, and shrinkage factor is comparative example 1 The 34.28% of sample.
Embodiment 2
The siccative quality proportioning of composite enhanced rapid-patching motar is: sulphate aluminium cement 30%, Super-fine limestone powder 2%, metakaolin 2%, redispersible latex powder 0.5%, sodium gluconate 0.2%, water reducer 0.2%, defoamer 0.1%, sand (modulus of fineness is 2.2) 65%.
Above-mentioned siccative is mixed to get mortar with water by the ratio of mud 0.3, then incorporation accounts for mortar volume The modified fibre of 1% obtains composite enhanced rapid-patching motar.The wherein preparation side of modified fibre Method is: average length is respectively the polypropylene fibre 1:2 in mass ratio mixing of 2mm and 12mm, It is then placed in VAE emulsion (solid content 60%) infiltration 1 minute, then to be placed in temperature be 20 DEG C Environment is dried 20min and obtains modified fibre.
The composite enhanced rapid-patching motar performance test of the present embodiment gained is as shown in table 3.
Table 3
As known from Table 3, relative to comparative example 1, prepared by the present embodiment composite enhanced soon Speed mending mortar rupture strength improves 32.95%, and bend-press ratio improves 22.86%, and tension bonds Intensity improves 50.55%, and anti-folded knotting strength improves 59.36%, and shrinkage factor is comparative example 1 The 51.43% of sample.
Embodiment 3
The siccative quality proportioning of composite enhanced rapid-patching motar is: sulphate aluminium cement 30%, Super-fine limestone powder 2%, metakaolin 10%, redispersible latex powder 2%, sodium gluconate 0.2%, water reducer 0.2%, defoamer 0.6%, sand (modulus of fineness is 0.7) 55%.
Above-mentioned siccative is mixed to get mortar with water by the ratio of mud 0.25, then incorporation accounts for body The modified fibre of long-pending 0.5% obtains composite enhanced rapid-patching motar.The wherein system of modified fibre Preparation Method is: average length is respectively the polypropylene fibre 2:1 in mass ratio of 6mm and 22mm Mixing, is then placed in VAE emulsion (solid content 40%) infiltration 2 minutes, then is placed in temperature and is 20 DEG C of environment are dried 10min and obtain modified fibre.
The composite enhanced rapid-patching motar performance test of the present embodiment gained is as shown in table 4.
Table 4
As known from Table 4, relative to comparative example 1, prepared by the present embodiment composite enhanced soon Speed mending mortar rupture strength improves 14.77%, and bend-press ratio improves 3.43%, and tension bonds Intensity improves 25.27%, and anti-folded knotting strength improves 43.75%, and shrinkage factor is comparative example 1 The 57.14% of sample.
Embodiment 4
The siccative quality proportioning of composite enhanced rapid-patching motar is: sulphate aluminium cement 35%, Super-fine limestone powder 10%, metakaolin 2%, redispersible latex powder 1.5%, gluconic acid Sodium 0.4%, water reducer 0.6%, defoamer 0.5%, sand (modulus of fineness is 2.2) 50%.
Above-mentioned siccative is mixed to get mortar with water by the ratio of mud 0.35, then incorporation accounts for body The modified fibre of long-pending 1% obtains composite enhanced rapid-patching motar.The wherein preparation of modified fibre Method is: the polypropylene fibre 2:1 in mass ratio that average length is respectively 8mm and 12mm mixes Close, be then placed in VAE emulsion (solid content 20%) infiltration 5 minutes, then be placed in temperature and be 20 DEG C of environment are dried 10min and obtain modified fibre.
The composite enhanced rapid-patching motar performance test of the present embodiment gained is as shown in table 5.
Table 5
As known from Table 5, relative to comparative example 1, prepared by the present embodiment composite enhanced soon Speed mending mortar rupture strength improves 27.27%, and bend-press ratio improves 16%, and tension bonding is strong Degree improves 32.96%, and anti-folded knotting strength improves 37.5%, and shrinkage factor is comparative example 1 sample The 54.28% of product.
Embodiment 5
The siccative quality proportioning of composite enhanced rapid-patching motar is: sulphate aluminium cement 50%, Super-fine limestone powder 7%, metakaolin 10%, redispersible latex powder 1.5%, gluconic acid Sodium 0.3%, water reducer 0.6%, defoamer 0.6%, sand (modulus of fineness is 1.2) 30%.
Above-mentioned siccative is mixed to get mortar with water by the ratio of mud 0.35, then incorporation accounts for body The modified fibre of long-pending 2% obtains composite enhanced rapid-patching motar.The wherein preparation of modified fibre Method is: the polypropylene fibre 1:1 in mass ratio that average length is respectively 6mm and 22mm mixes Close, be then placed in VAE emulsion (solid content 40%) infiltration 5 minutes, then be placed in temperature and be 20 DEG C of environment are dried 10min and obtain modified fibre.
The composite enhanced rapid-patching motar performance test of the present embodiment gained is as shown in table 6.
Table 6
As known from Table 6, relative to comparative example 1, prepared by the present embodiment composite enhanced soon Speed mending mortar rupture strength improves 44.32%, and bend-press ratio improves 20.57%, and tension bonds Intensity improves 10.98%, and anti-folded knotting strength improves 46.88%, and shrinkage factor is comparative example 1 The 71.43% of sample.

Claims (7)

1. a composite enhanced rapid-patching motar, it is characterised in that first it mixed with water by siccative Conjunction obtains mortar, then mixes and account for the modified fibre of mortar volume 0.5-2% and obtain;
Raw material and the quality proportioning of described siccative be: sulphate aluminium cement 30-50%, super-fine limestone powder 2-10%, metakaolin 2-10%, redispersible latex powder 0.5-2%, sodium gluconate 0.1-0.4%, Water reducer 0.2-0.6%, defoamer 0.1-0.6%, sand 30-65%, each constituent mass sum is 100%.
Composite enhanced rapid-patching motar the most according to claim 1, it is characterised in that described The preparation method of modified fibre is: by chopped fiber that average length is 2-8mm and average a length of 12-22mm Long fibre mixing, 2:1-1:2 in mass ratio uniformly mixes, be then placed in VAE emulsion infiltrate 1-5 Minute, then it is dried to obtain modified fibre.
Composite enhanced rapid-patching motar the most according to claim 2, it is characterised in that described VAE emulsion solid content is 20-60%.
Composite enhanced rapid-patching motar the most according to claim 1, it is characterised in that described Siccative and water quality are than for 1:0.25-0.35.
Composite enhanced rapid-patching motar the most according to claim 1, it is characterised in that described Water reducer is Polycarboxylic Superplasticizer.
Composite enhanced rapid-patching motar the most according to claim 1, it is characterised in that described Defoamer is the AGITANR P803 type defoamer that German bright icepro Chemical Group produces.
Composite enhanced rapid-patching motar the most according to claim 1, it is characterised in that described Sand is fluvial sand, and its modulus of fineness is 0.7-2.2.
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Cited By (8)

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CN106699081A (en) * 2016-11-21 2017-05-24 同济大学 Cob brick structure repair materials prepared by using lime, bentonite and metakaolin and use method thereof
CN107140922A (en) * 2017-07-05 2017-09-08 张聪聪 Road quick patching mortar and its production method
CN107324737A (en) * 2017-08-01 2017-11-07 合肥广民建材有限公司 A kind of concrete slab mending mortar and preparation method
CN108516728A (en) * 2018-05-02 2018-09-11 芜湖恒固混凝土材料有限公司 A kind of preparation method of early strength water-reducing agent for salvaging
CN108585607A (en) * 2018-05-02 2018-09-28 芜湖恒固混凝土材料有限公司 A kind of polyesters polycarboxylic acids early strength water-reducing agent
CN108609893A (en) * 2018-05-02 2018-10-02 芜湖恒固混凝土材料有限公司 A kind of preparation method of polyesters polycarboxylic acids early strength water-reducing agent
CN109020421A (en) * 2018-09-05 2018-12-18 东南大学 A kind of composite fibre fast repairing material and preparation method thereof
CN109704608A (en) * 2019-01-28 2019-05-03 武汉大学 A method of improving fiber concrete tensile strength

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106699081A (en) * 2016-11-21 2017-05-24 同济大学 Cob brick structure repair materials prepared by using lime, bentonite and metakaolin and use method thereof
CN107140922A (en) * 2017-07-05 2017-09-08 张聪聪 Road quick patching mortar and its production method
CN107324737A (en) * 2017-08-01 2017-11-07 合肥广民建材有限公司 A kind of concrete slab mending mortar and preparation method
CN108516728A (en) * 2018-05-02 2018-09-11 芜湖恒固混凝土材料有限公司 A kind of preparation method of early strength water-reducing agent for salvaging
CN108585607A (en) * 2018-05-02 2018-09-28 芜湖恒固混凝土材料有限公司 A kind of polyesters polycarboxylic acids early strength water-reducing agent
CN108609893A (en) * 2018-05-02 2018-10-02 芜湖恒固混凝土材料有限公司 A kind of preparation method of polyesters polycarboxylic acids early strength water-reducing agent
CN109020421A (en) * 2018-09-05 2018-12-18 东南大学 A kind of composite fibre fast repairing material and preparation method thereof
CN109704608A (en) * 2019-01-28 2019-05-03 武汉大学 A method of improving fiber concrete tensile strength
CN109704608B (en) * 2019-01-28 2020-06-09 武汉大学 Method for improving tensile strength of fiber concrete

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