CN105837137B - A kind of composite enhanced rapid-patching motar - Google Patents

A kind of composite enhanced rapid-patching motar Download PDF

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Publication number
CN105837137B
CN105837137B CN201610216648.1A CN201610216648A CN105837137B CN 105837137 B CN105837137 B CN 105837137B CN 201610216648 A CN201610216648 A CN 201610216648A CN 105837137 B CN105837137 B CN 105837137B
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China
Prior art keywords
composite enhanced
enhanced rapid
patching
patching motar
motar
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CN201610216648.1A
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Chinese (zh)
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CN105837137A (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 present invention relates to a kind of composite enhanced rapid-patching motar, it is mixed to get mortar by siccative and water first, then mixes and account for the modified fibre of mortar volume 0.5 2% and obtain;The raw material and quality proportioning of the 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 component quality sum are 100%.The composite enhanced rapid-patching motar of the present invention improves the active force between new-to-old concrete interface, good to repair efficiencies such as concrete road surfaces.

Description

A kind of composite enhanced rapid-patching motar
Technical field
The invention belongs to building material technical field, is related to a kind of composite enhanced rapid-patching motar.
Background technology
Concrete construction is due to having the advantages that intensity height, good endurance, construction is simple, good in economic efficiency, several recently Swift and violent development has been obtained in 10 years, tremendous contribution is made that for modernization economic construction.But due to cement concrete in itself Defect, the erosion of environment and artificial destruction, as the years are accumulated, occurs crackle in the concrete construction of part, burn into freezes Melt the problem of destruction and alkali-aggregate reaction etc. are serious, the security of serious threat structure.Global construction development process is made a general survey of, can With, it is evident that after it experienced building peak period, the substantial amounts of cement concrete repairing work that comes one after another.Building Trade in China Although at present on the occasion of peak period, because construction quality problem is more universal, concrete repair industry also begins to quietly rise.
For concrete road surface Common Diseases, also there are some patching materials on the market, but these patching materials are more or less Face this following several defect:(1) patching material is expensive:Wherein it polymerize species patching material such as epoxy resin, phenolic aldehyde It is sufficiently expensive with modified phenolic resin lipid, adhesive polyurethane kind, alkenes, rubber-like, pitch class adhesive price, it is difficult to big face Product application;(2) poor durability:Special cement class patching material later strength has retraction, also wears no resistance, be new and old mixed The problems such as solidifying native adhesive property is poor, and it polymerize that species repairing pavement durability is poor, and the ageing properties such as water-fast, hot, light are irregular not Together, usually use less than 2 years, phenomenon of peeling just occurs for road surface;(3) curing time is uneven:Concrete road surface degree of disease It is different, it is necessary to patching material and curing time it is also different, often degree is shallower, it is necessary to not influence traffic for thin layer disease In the case of Rapid-Repair, and deep layer large area disease needs the patching material of the quick open to traffic of low cost, and existing repairing Material needs longer curing time longer mostly, does not also account for pavement disease type, gives road surface particularly airport or height Fast highway pavement repairing brings very big inconvenience;(4) interfacial adhesion between New-old concrete:The reason for repairing failure, absolutely Most of is to cause repairing to fail because new-old concrete (mortar) is come off at interface, (the 100- of new-old concrete or mortar 200 μm) transition zone is bonding interface most weak floor, the layer is thick rich in stomata, crack, moisture film and entringite and calcium hydroxide Crystal, and this crystal intensity is poor, is a big key factor of repairing failure.Therefore, research prepares it is a kind of soon firmly without rapid hardening, Early strength is high, it is durable to cohere, has the strong composite enhanced rapid-patching motar of microdilatancy characteristic, pliability highly significant.
The content of the invention
The technical problems to be solved by the invention are for above shortcomings in the prior art, there is provided a kind of compound increasing Strong type rapid-patching motar, the mending mortar it is fast firmly without rapid hardening, early strength is high, it is durable to cohere, has microdilatancy characteristic, soft Toughness is strong.
In order to solve the above technical problems, technical scheme provided by the invention is:
A kind of composite enhanced rapid-patching motar is provided, it is mixed to get mortar by siccative and water first, then mixes and account for Mortar volume 0.5-2% modified fibre obtains;
The raw material and quality proportioning of the siccative be:Sulphate aluminium cement 30-50%, super-fine limestone powder 2-10%, partially Kaolin 2-10%, redispersible latex powder 0.5-2%, sodium gluconate 0.1-0.4%, water reducer 0.2-0.6%, defoaming Agent 0.1-0.6%, sand 30-65%, each component quality sum are 100%.
By such scheme, the preparation method of the modified fibre is:By chopped fiber of the average length for 2-8mm and average length Spend and mixed for 12-22mm long fibre, in mass ratio 2:1-1:2 uniformly mixing, are then placed in infiltration 1-5 minutes in VAE emulsions, Re-dry obtains modified fibre.
By such scheme, VAE emulsions (vinyl copolymer emulsion) solid content is 20-60%.
Preferably, the siccative and water quality ratio are 1:0.25-0.35.
By such scheme, the water reducer is Polycarboxylic Superplasticizer.
Preferably, defoamer is the bright AGITANR P803 type defoamers for insulting Chemical Group production of Germany.
By such scheme, the sand is river sand, and its modulus of fineness is 0.7-2.2.
Preferably, the sand modulus of fineness is 0.7-1.2.
The beneficial effects of the present invention are:Compared with existing patching material, mending mortar of the present invention is mainly with sulphur Aluminate cement is binder materials, and the main hydration products of sulphate aluminium cement are entringite and aluminium glue, wherein with expansion effect The entringite answered can fill the capillary gap on old concrete surface, make the mechanical snap power at interface bigger, swollen due to that can produce Expansive force, make to produce compressive pre-stress inside slurry, compensate inside slurry due to shrinkage stress caused by solidification, reduce drying shrinkage and split Seam;Further, since the early powerful feature of sulphate aluminium cement, in early stage with regard to higher intensity and metastable springform can be reached Amount so that the active force between fiber and cement base in patching material will not decay over time, and pass through table The fiber of face modification can reduce the adhesion with cement-based material due to the acid film forming matter on its surface, mortar is existed When being damaged, what fiber was presented is the effect of sliding-dispel-type, and the conduction mode in this crack can improve fiber in mortar Utilization rate, it is scattered to deliver the load force being subject to, the toughness of mortar greatly improved, reduction directly acts on the old and new circle Active force on face, and by mixing various sizes of fiber, the anti-drying shrinkage of mortar can be further improved, reduce volume contraction Effect.Compared than common portland cement, sulphate aluminium cement also has the advantages that compact structure, good corrosion resistance.
Appropriate agstone and metakaolin are mixed in patching material, its differential effect and micro aggregate effect can add The aquation of fast cement, refine crystal structure, fill loose porous weak transition region, add Van der Waals force between interface and Mechanical snap power.Active CaCO in super-fine limestone powder3Structure can be formed with the hydrated product of sulphate aluminium cement more Stable calcium aluminate of hydrated carbon, structural stability and durability for patching material are all very helpful.Water reducer adds Enter to reduce the ratio of mud of system, improve fluidity, closely knit pore structure, improve the durability in later stage.The addition of defoamer can To reduce high porosity, the structure at closely knit interface caused by the polymer mixed.The addition of sodium gluconate can adjust The setting time of mortar is saved, and it is small on later strength influence, corresponding volume can be adjusted according to the requirement of construction.
Two reasons can mainly be had in dispersed latex powder by being added in system:1st, can be in dispersed latex powder to old coagulation Soil matrix body permeates in space, filling concrete particle, wraps up the hydrated product of cement, forms what polymer was mutually filled with Behavior of Hardened Cement Paste Mechanism, increases mechanical snap power and Van der Waals force, 2, polymer there is water-retaining property, can fully soak the table of old concrete Face, make hydrated cementitious abundant, generate more hydrated products and be filled in the space of old concrete, ensure that between the old and new interface Mechanics symbiosis.
In summary, the composite enhanced rapid-patching motar of the present invention improves the effect between new-to-old concrete interface Power, first by the effects such as the dilatancy of sulphate aluminium cement, the polymerization film formation effect of polymer improve new-old concrete it Between mechanical snap power and Van der Waals force, add the original bond intensity under non-load;Secondly as the high tenacity of material, The load that can make to be subject to is distributed in whole system, is reduced the power being subject on repairing interface, is indirectly improved the old and new's coagulation The interaction of Soil Interface, it is good to repair efficiencies such as concrete road surfaces.TD-1 polymer repairing preferable with sales volume on the market Mortar is compared, and composite enhanced rapid-patching motar rupture strength is improved up to 40%, and bend-press ratio is improved up to 35%, and tension bonds strong Degree is improved up to 80%, and anti-folded knotting strength is improved up to 75%, and contraction is reduced to the 35% of commercially available prod.It can be seen that the mortar significantly carries The high adhesion strength of patching material and the toughness of mending mortar.
Embodiment
To make those skilled in the art more fully understand technical scheme, the present invention is made with reference to embodiment It is described in further detail.
Used chemical admixture in following instance:Redispersible latex powder is the limited public affairs of the good industry development of Shanghai shadow The TS606 type latex powders of production are taken charge of, water reducer is that the PCA polycarboxylic acids of Jiangsu Subotexin Material Co., Ltd's production is efficient Water reducer, defoamer produce for the bright icepro Chemical Group of Germany, model AGITANR P803.
Comparative example 1
Commercially available TD-1 waterproof polymer mortars, its test result are 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 1.2) 50%.
Above-mentioned siccative and water are mixed to get mortar by the ratio of mud 0.3, then mix the modified fibre for accounting for mortar volume 0.5% Obtain composite enhanced rapid-patching motar.The preparation method of wherein modified fibre is:It is respectively 6mm and 12mm by average length Polypropylene fibre in mass ratio 1:1 mixing, infiltration 2 minutes in VAE emulsions (solid content 40%) are then placed in, then are placed in temperature Spend and obtain modified fibre to dry 10min in 20 DEG C of environment.
Composite enhanced rapid-patching motar performance test is as shown in table 2 obtained by the present embodiment.
Table 2
As known from Table 2, relative to comparative example 1, the anti-folding of composite enhanced rapid-patching motar prepared by the present embodiment is strong Degree improves 38.62%, and bend-press ratio improves 36.57%, and tension adhesion strength improves 78.02%, and anti-folded knotting strength carries High by 71.87%, shrinkage factor is the 34.28% of the sample of comparative example 1.
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 2.2) 65%.
Above-mentioned siccative and water are mixed to get mortar by the ratio of mud 0.3, then is mixed and is accounted for the modified fibre of mortar volume 1% and obtain To composite enhanced rapid-patching motar.The preparation method of wherein modified fibre is:It is respectively 2mm and 12mm by average length Polypropylene fibre in mass ratio 1:2 mixing, infiltration 1 minute in VAE emulsions (solid content 60%) is then placed in, then is placed in temperature and is 20min is dried in 20 DEG C of environment and obtains modified fibre.
Composite enhanced rapid-patching motar performance test is as shown in table 3 obtained by the present embodiment.
Table 3
As known from Table 3, relative to comparative example 1, the anti-folding of composite enhanced rapid-patching motar prepared by the present embodiment is strong Degree improves 32.95%, and bend-press ratio improves 22.86%, and tension adhesion strength improves 50.55%, and anti-folded knotting strength carries High by 59.36%, shrinkage factor is the 51.43% of the sample of comparative example 1.
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 0.7) 55%.
Above-mentioned siccative and water are mixed to get mortar by the ratio of mud 0.25, then mixes and accounts for the modified fine of mortar volume 0.5% Dimension obtains composite enhanced rapid-patching motar.The preparation method of wherein modified fibre is:By average length be respectively 6mm and 22mm polypropylene fibre in mass ratio 2:1 mixing, infiltration 2 minutes in VAE emulsions (solid content 40%) are then placed in, then be placed in Temperature is to dry 10min in 20 DEG C of environment to obtain modified fibre.
Composite enhanced rapid-patching motar performance test is as shown in table 4 obtained by the present embodiment.
Table 4
As known from Table 4, relative to comparative example 1, the anti-folding of composite enhanced rapid-patching motar prepared by the present embodiment is strong Degree improves 14.77%, and bend-press ratio improves 3.43%, and tension adhesion strength improves 25.27%, and anti-folded knotting strength improves 43.75%, shrinkage factor is the 57.14% of comparative example 1 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%, sodium gluconate 0.4%, water reducer 0.6%, defoamer 0.5%, sand (modulus of fineness 2.2) 50%.
Above-mentioned siccative and water are mixed to get mortar by the ratio of mud 0.35, then mix the modified fibre for accounting for mortar volume 1% Obtain composite enhanced rapid-patching motar.The preparation method of wherein modified fibre is:It is respectively 8mm and 12mm by average length Polypropylene fibre in mass ratio 2:1 mixing, infiltration 5 minutes in VAE emulsions (solid content 20%) are then placed in, then are placed in temperature Modified fibre is obtained to dry 10min in 20 DEG C of environment.
Composite enhanced rapid-patching motar performance test is as shown in table 5 obtained by the present embodiment.
Table 5
As known from Table 5, relative to comparative example 1, the anti-folding of composite enhanced rapid-patching motar prepared by the present embodiment is strong Degree improves 27.27%, and bend-press ratio improves 16%, and tension adhesion strength improves 32.96%, and anti-folded knotting strength improves 37.5%, shrinkage factor is the 54.28% of the sample of comparative example 1.
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%, sodium gluconate 0.3%, water reducer 0.6%, defoamer 0.6%, sand (modulus of fineness 1.2) 30%.
Above-mentioned siccative and water are mixed to get mortar by the ratio of mud 0.35, then mix the modified fibre for accounting for mortar volume 2% Obtain composite enhanced rapid-patching motar.The preparation method of wherein modified fibre is:It is respectively 6mm and 22mm by average length Polypropylene fibre in mass ratio 1:1 mixing, infiltration 5 minutes in VAE emulsions (solid content 40%) are then placed in, then are placed in temperature Modified fibre is obtained to dry 10min in 20 DEG C of environment.
Composite enhanced rapid-patching motar performance test is as shown in table 6 obtained by the present embodiment.
Table 6
As known from Table 6, relative to comparative example 1, the anti-folding of composite enhanced rapid-patching motar prepared by the present embodiment is strong Degree improves 44.32%, and bend-press ratio improves 20.57%, and tension adhesion strength improves 10.98%, and anti-folded knotting strength carries High by 46.88%, shrinkage factor is the 71.43% of the sample of comparative example 1.

Claims (6)

1. a kind of composite enhanced rapid-patching motar, it is characterised in that it is mixed to get mortar by siccative and water first, then mixes The modified fibre for entering to account for mortar volume 0.5-2% obtains;
The raw material and quality proportioning of the siccative be:Sulphate aluminium cement 30-50%, super-fine limestone powder 2-10%, higher ridge Native 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 are 100%;
The preparation method of the modified fibre is:The length for being 12-22mm by chopped fiber and average length that average length is 2-8mm Fiber mixes, and in mass ratio 2:1-1:2 uniformly mixing, it is then placed in infiltration 1-5 minutes, re-dry in VAE emulsions and is modified Fiber.
2. composite enhanced rapid-patching motar according to claim 1, it is characterised in that the VAE emulsion solid contents are 20-60%.
3. composite enhanced rapid-patching motar according to claim 1, it is characterised in that the siccative and water quality ratio For 1:0.25-0.35.
4. composite enhanced rapid-patching motar according to claim 1, it is characterised in that the water reducer is polycarboxylic acids Analog high efficiency water reducing agent.
5. composite enhanced rapid-patching motar according to claim 1, it is characterised in that the defoamer is bright for Germany Insult the AGITANR P803 type defoamers of Chemical Group production.
6. composite enhanced rapid-patching motar according to claim 1, it is characterised in that the sand is river sand, its Modulus of fineness is 0.7-2.2.
CN201610216648.1A 2016-04-08 2016-04-08 A kind of composite enhanced rapid-patching motar CN105837137B (en)

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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
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