CN101412609B - Cement polymer mortar for reinforcing and repairing concrete - Google Patents
Cement polymer mortar for reinforcing and repairing concrete Download PDFInfo
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- CN101412609B CN101412609B CN2008102246119A CN200810224611A CN101412609B CN 101412609 B CN101412609 B CN 101412609B CN 2008102246119 A CN2008102246119 A CN 2008102246119A CN 200810224611 A CN200810224611 A CN 200810224611A CN 101412609 B CN101412609 B CN 101412609B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions 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
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/72—Repairing or restoring existing buildings or building materials
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a building material and a method for preparing the same. The invention discloses a cement polymer mortar used for concrete reinforcement and restoration, which comprises the following raw materials in weight portion: 360 to 400 portions of Portland cement, 40 to 50 portions of active admixture, 2 to 4 portions of water reducing agent, 550 to 600 portions of quartz sand, 1.50 to 8.5 portions of acrylic acid modified rosin resin, and 72.5 to 88.0 portions of acrylic ester emulsion. The cement polymer mortar has the advantages of good crack resistance, higher compression strength and rupture strength, good bonding strength with a cement test block, and wide fluidity range; besides, the cement polymer mortar can adapt to various site operation conditions, and is mainly applied to the reinforcement and the restoration of a concrete structure.
Description
Technical field
The present invention relates to a kind of material of construction and preparation method thereof, particularly be used for cement polymer mortar of concrete strengthening reparation and preparation method thereof.
Background technology
The effect of mortar has two aspects: the one, with screed and integral body of the bonding firm formation of substrate concrete; The 2nd, play the effect of reinforcing bar or steel mesh protective layer.The thickness of general screed is 10-30mm, when concrete structure reinforcement is repaired, the mortar that stirs is fixed to the concrete surface of being repaired with mechanically spraying or the manual mode of smearing or being in the milk.
So the requirement to mortar is:
(1) have high compression strength: the intensity of mortar should be less than the intensity of substrate concrete;
(2) higher folding strength: promptly snappiness is strong, and certain splitting resistance and non-deformability are arranged;
(3) higher cementability is arranged: require to closely bond with substrate concrete;
(4) when implementing manual plastering, require that lower flowability is arranged, and require to have higher flowability during grouting construction.
To need data up to standard be 28 days ultimate compression strength 〉=50MPa, 28 days folding strength 〉=10Mpa, the mortar surface does not allow to occur crack etc. during with bonding strength 〉=1.50MPa, the degree of mobilization 〉=160mm of cement briquette and 70 ℃ of cracking tests.
Domestic present most cement polymer mortars all adopt acrylic ester emulsion to do sizing agent, this emulsion and sand-cement slurry have good compatibleness, new sand cutting slurry has 30-60 minute operable time, but can not satisfy above-mentioned resistance to compression, anti-folding, bonding and contraction of indices simultaneously.The mortar that the testing laboratory of Shanghai Tongji University makes satisfies above-mentioned resistance to compression, anti-folding, bonding and contraction of indices, but what wherein polymkeric substance used is styrene-butadiene emulsion, because test is higher with the styrene-butadiene emulsion price, and relatively poor with the compatibleness of sand-cement slurry, do not find the report of in actual engineering, using at present yet.Above-mentioned in addition two class mortars are prone to crack phenomenon when 70 ℃ of cracking tests.
Summary of the invention
The invention solves existing cement polymer mortar and be easy to occur problem of cracks, provide a kind of cost low and satisfy 28 days ultimate compression strength 〉=50MPa, 28 days folding strength 〉=10Mpa, bonding strength 〉=1.50MPa, degree of mobilization mortar surface between 168-320mm, during 70 ℃ of cracking tests simultaneously and fissured novel concrete polymer mortar do not occur.This cement polymer mortar is applicable to manual plastering construction during for 168-182mm at degree of mobilization, and degree of mobilization is applicable to grouting construction during for 309-320mm.
Cement polymer mortar of the present invention, the weight proportion of the raw material that it comprises is: silicate cement 360-400 part, active admixture 40-50 part, water reducer 2-4 part, quartz sand 550-600 part, acrylic acid modified rosin resin 1.5-8.5 part, acrylic ester emulsion 72.5-88.0 part.
Above-mentioned water reducer is preferably naphthalenesulfonate or the polycarboxylate water-reducer that meets GB8076 " concrete admixture ".The PO52.5 silicate cement of the preferred GB175 of silicate cement " silicate cement, ordinary Portland cement " regulation.
Above-mentioned active admixture preferably meets the slag powders that I level flyash among the GB1596 " flyash that is used for cement and concrete ", activated grammite that main component is silicon-dioxide and main component be silicon-dioxide and aluminium sesquioxide and mixes with any ratio.
The solid content of acrylic ester emulsion is 49%, and pH value is between 7.0-8.5, and the Tg value is 10 ℃.The acrylic acid modified rosin resin solid content is 44%, and pH value is between 4.0-5.0, and the Tg value is 5 ℃.
The liquid polymers that has active group that forms a class soft segment block after acrylic ester emulsion and the acrylic acid modified rosin mixed with resin and form, being spiked into can be with island backbone and cement-hydrate and the aggregate mortise alternate with chain after the sand-cement slurry, promptly be that sand-cement slurry provides the toughness connection also to resist the string stress that the mortar contraction produces with the distortion of island structure, stop the cracking of mortar with the backbone.
The quartz sand particle size that the present invention selects for use is 0.088-2.0mm, and its concrete size distribution (by weight percentage) is: 1-2mm10-30%, 0.4-1.0mm25-40%, 0.2-0.4mm18-30%, 0.088-0.2mm6-15%.
Cement polymer mortar of the present invention also can contain 60-80 part water.
The preferred weight proportion of raw material that comprises when above-mentioned cement polymer mortar is: silicate cement 380-400 part, active admixture 48-50 part, water reducer 3.5.-4.0 part, quartz sand 550-572 part, acrylic acid modified rosin resin 2.0-8.5 part, acrylic ester emulsion 81.5-88.0 part, and when water reducer is polycarboxylate water-reducer, the cement polymer mortar degree of mobilization of preparation is 309-320mm, is applicable to grouting construction.
The raw material preferred weight proportioning that comprises when above-mentioned cement polymer mortar is: silicate cement 360-370 part, active admixture 40-45 part, water reducer 2.0-2.4 part, quartz sand 585-600 part, acrylic acid modified rosin resin 1.5-7.5 part, acrylic ester emulsion 72.5-78.5 part, and when water reducer is the naphthalenesulfonate water reducer, prepared cement polymer mortar degree of mobilization is 168-182mm, is applicable to manual plastering construction.
The present invention also provides the preparation method of above-mentioned cement polymer mortar.The method for preparing cement polymer mortar of the present invention is made up of following steps:
The first step is put into stirred pot and is mixed stirring 10-15 minute at normal temperatures and pressures after part by weight takes by weighing in accordance with regulations with water with acrylic acid modified rosin resin, acrylic ester emulsion, it is standby to obtain liquid Preblend.
In second step, silicate cement, quartz sand, water reducer, active admixture are put into liquid Preblend that stirrer for mixing stirs the first step gained added the predetermined weight ratio in 10-15 minute again in proportion mix to stir and got final product in 10-15 minute.
Cement polymer mortar of the present invention, press following standard testing: resistance to compression and folding strength are pressed GB/T17671 " cement mortar strength test method " test; Bonding strength is pressed JC/T907 " concrete interface treating agent " test; Degree of mobilization is pressed YB/T9261-98 " cement-based grouting material operating technique rules " test; Splitting resistance is pressed BYSMC-ES-04-2007 " EC anticracking grout " test.The method that the present invention tests splitting resistance is that the polymer mortar applying material that will prepare is on the cement fibrolite plate of 160 * 120 * 5mm, smear layer thickness is not less than 10mm, directly put into then and be heated to 70 ℃ and baking oven that the hot blast internal recycle is arranged, generally be no less than 4h, take out the back and observe its surface cracking situation.Be used in the concrete structure reinforcement construction through the product that this method is up to the standards, do not find any crack, illustrate that testing method of the present invention is comparatively strict to the check of early stage resistance to cleavage, have higher confidence level through 12 months observations.
The various The performance test results of cement polymer mortar of the present invention are:
(1) ultimate compression strength: 52.31-64.32MPa can satisfy the following consolidation of concrete structure reparation of C40 (comprising);
(2) folding strength: 10.54-17.50MPa makes mortar have snappiness, cracking resistance deformation resistance;
(3) bonding force: 1.54-3.08MPa;
(4) degree of mobilization: 168-320mm;
(5) splitting resistance: cracking do not occur 70 ℃ of cracking tests.
Cement polymer mortar of the present invention is mainly used in consolidation of concrete structure and reparation.
Embodiment:
Embodiment 1 cement polymer mortar of the present invention and preparation method thereof
Cement polymer mortar of the present invention, the weight proportion of its raw material is as follows:
360 parts of silicate cements
40 parts of active admixtures
2.0 parts of water reducers
600 parts of quartz sands
1.5 parts of acrylic acid modified rosin resins
78.5 parts of acrylic ester emulsions
60 parts in water
Water reducer is the naphthalenesulfonate water reducer, and 40 parts of active admixtures are made up of for 17 parts 7 parts of activated grammites, 16 parts in I level flyash, slag powders.Described silicate cement is 52.5 silicate cements of GB175 " silicate cement, ordinary Portland cement ".The solid content of acrylic acid modified rosin resin is 44%, pH value 4.0, and the Tg value is 5 ℃.The solid content of acrylic ester emulsion is 49%, and pH value is 7.0, and the Tg value is 10 ℃.
The preparation method is:
The first step is put into stirred pot and is mixed stirring 10-15 minute at normal temperatures and pressures after part by weight takes by weighing in accordance with regulations with water with acrylic acid modified rosin resin, acrylic ester emulsion, it is standby to obtain liquid Preblend.
In second step, silicate cement, quartz sand, water reducer, active admixture are put into liquid Preblend that stirrer for mixing stirs the first step gained added the predetermined weight ratio in 10-15 minute again in proportion mix to stir and got final product in 10-15 minute.
Present embodiment resulting polymers mortar performance is as follows:
(1) ultimate compression strength: 64.32MPa
(2) folding strength: 10.54MPa
(3) bonding force: 1.54MPa
(4) degree of mobilization: 182mm
(5) splitting resistance: cracking do not occur 70 ℃ of cracking tests.
Embodiment 2
Get the following raw material of weight proportion, prepare cement polymer mortar by embodiment 1 described method:
360 parts of silicate cements
40 parts of active admixtures
2.2 parts of water reducers
600 parts of quartz sands
3.0 parts of acrylic acid modified rosin resins
77.0 parts of acrylic ester emulsions
60 parts in water.
40 parts of described active admixtures are made up of for 9 parts 8 parts of activated grammites, 23 parts in I level flyash, slag powders.
Described silicate cement is 52.5 silicate cements of GB175 " silicate cement, ordinary Portland cement ".The solid content of acrylic acid modified rosin resin is 44%, pH value 4.0, and the Tg value is 5 ℃.The solid content of acrylic ester emulsion is 49%, and pH value is 7.0, and the Tg value is 10 ℃.
The prepared cement polymer mortar performance of present embodiment is as follows:
(1) ultimate compression strength: 63.33MPa
(2) folding strength: 12.72MPa
(3) bonding force: 2.52MPa
(4) degree of mobilization: 174mm
(5) splitting resistance: cracking do not occur 70 ℃ of cracking tests.
Embodiment 3
Get the following raw material of weight proportion, prepare cement polymer mortar by embodiment 1 described method:
370 parts of silicate cements
45 parts of active admixtures
2.4 parts of water reducers
585 parts of quartz sands
7.5 parts of acrylic acid modified rosin resins
72.5 parts of acrylic ester emulsions
60 parts in water
45 parts of active admixtures are made up of for 14 parts 11 parts of activated grammites, 20 parts in I level flyash, slag powders.Water reducer is the naphthalenesulfonate water reducer.The solid content of acrylic acid modified rosin resin is 44%, pH value 4.0, and the Tg value is 5 ℃.The acrylic ester emulsion solid content is 49%, and pH value is 7.0, and the Tg value is 10 ℃.
The prepared cement polymer mortar performance of present embodiment is as follows:
(1) ultimate compression strength: 52.31MPa
(2) folding strength: 17.50MPa
(3) bonding force: 2.81MPa
(4) degree of mobilization: 168mm
(5) splitting resistance: cracking do not occur 70 ℃ of cracking tests.
Embodiment 4
Get the following raw material of weight proportion, prepare cement polymer mortar by embodiment 1 described method:
380 parts of silicate cements
48 parts of active admixtures
3.5 parts of water reducers
572 parts of quartz sands
2.0 parts of acrylic acid modified rosin resins
88.0 parts of acrylic ester emulsions
80 parts in water
48 parts of described active admixtures are made up of for 15 parts 23 parts of activated grammites, 10 parts in I level flyash, slag powders.
Silicate cement is 52.5 silicate cements of GB175 " silicate cement, ordinary Portland cement ".
The solid content of acrylic acid modified rosin resin is 44%, pH value 4.0, and the Tg value is 5 ℃.
The acrylic ester emulsion solid content is 49%, and pH value is 7.0, and the Tg value is 10 ℃.
Water reducer is a polycarboxylate water-reducer.
The prepared cement polymer mortar performance of present embodiment is as follows:
(1) ultimate compression strength: 62.15MPa
(2) folding strength: 11.65MPa
(3) bonding force: 1.72MPa
(4) degree of mobilization: 320mm
(5) splitting resistance: cracking do not occur 70 ℃ of cracking tests.
Embodiment 5
Get the following raw material of weight proportion, prepare cement polymer mortar by embodiment 1 described method:
400 parts of silicate cements
50 parts of active admixtures
3.8 parts of water reducers
550 parts of quartz sands
3.5 parts of acrylic acid modified rosin resins
86.5 parts of acrylic ester emulsions
80 parts in water
Silicate cement is 52.5 silicate cements of GB175 " silicate cement, ordinary Portland cement ".
The solid content of acrylic acid modified rosin resin is 44%, pH value 4.0, and the Tg value is 5 ℃.
Water reducer is a polycarboxylate water-reducer.
50 parts of active admixtures are made up of for 8 parts 25 parts of activated grammites, 17 parts in I level flyash, slag powders.Described acrylic ester emulsion solid content is 49%, and pH value is 7.0, and the Tg value is 10 ℃.
The prepared cement polymer mortar performance of present embodiment is as follows:
(1) ultimate compression strength: 60.55MPa
(2) folding strength: 14.40MPa
(3) bonding force: 2.67MPa
(4) degree of mobilization: 315mm
(5) splitting resistance: cracking do not occur 70 ℃ of cracking tests.
Embodiment 6
Get the following raw material of weight proportion, prepare cement polymer mortar by embodiment 1 described method:
400 parts of silicate cements
50 parts of active admixtures
4.0 parts of water reducers
550 parts of quartz sands
8.5 parts of acrylic acid modified rosin resins
81.5 parts of acrylic ester emulsions
80 parts in water
Silicate cement is 52.5 silicate cements of GB175 " silicate cement, ordinary Portland cement ".The solid content of acrylic acid modified rosin resin is 44%, pH value 4.0, and the Tg value is 5 ℃.50 parts of active admixtures are made up of for 7 parts 27 parts of activated grammites, 16 parts in I level flyash, slag powders.Water reducer is a polycarboxylate water-reducer.The acrylic ester emulsion solid content is 49%, and pH value is 7.0, and the Tg value is 10 ℃.
The prepared cement polymer mortar performance of present embodiment is as follows:
(1) ultimate compression strength: 58.11MPa
(2) folding strength: 16.30MPa
(3) bonding force: 3.08MPa
(4) degree of mobilization: 309mm
(5) splitting resistance: cracking do not occur 70 ℃ of cracking tests.
The above only is preferred embodiment of the present invention, non-ly is used to limit protection scope of the present invention.
Claims (4)
1. cement polymer mortar, the raw material and the weight proportion thereof that contain are as follows:
Silicate cement 360-400 part,
Active admixture 40-50 part,
Water reducer 2-4 part,
Quartz sand 550-600 part,
Acrylic acid modified rosin resin 1.5-8.5 part,
Acrylic ester emulsion 72.5-88.0 part,
Water 60-80 part;
Wherein, described acrylic acid modified rosin resin solid content is 44%, and pH value is between 4.0-5.0, and the Tg value is 5 ℃; Described acrylic ester emulsion solid content is 49%, pH value be 7.0-8.5 between, the Tg value is 10 ℃; Described silicate cement is the PO52.5 silicate cement that meets GB175 " silicate cement, ordinary Portland cement " regulation; Described active admixture is that I level flyash, activated grammite and slag powders are formed than mixing with any; Quartz sand particle size is 0.088-2.0mm, and its concrete size distribution is by weight percentage: 1-2mm 10-30%, 0.4-1.0mm 25-40%, 0.2-0.4mm 18-30%, 0.088-0.2mm 6-15%.
2. cement polymer mortar according to claim 1, silicate cement 380-400 part wherein, active admixture 48-50 part, water reducer 3.5-4.0 part, quartz sand 550-572 part, water reducer is a polycarboxylate water-reducer.
3. cement polymer mortar according to claim 1, silicate cement 360-370 part wherein, active admixture 40-45 part, water reducer 2.0-2.4 part, quartz sand 585-600 part, water reducer is the naphthalenesulfonate water reducer.
4. preparation method of cement polymer mortar according to claim 1, be made up of following steps:
The first step is put into stirred pot and is mixed stirring 10-15 minute at normal temperatures and pressures after part by weight takes by weighing in accordance with regulations with water with acrylic acid modified rosin resin, acrylic ester emulsion, it is standby to obtain liquid Preblend.
In second step, silicate cement, quartz sand, water reducer, active admixture are put into liquid Preblend that stirrer for mixing stirs the first step gained added the predetermined weight ratio in 10-15 minute again in proportion mix to stir and got final product in 10-15 minute.
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| CN2008102246119A CN101412609B (en) | 2008-10-21 | 2008-10-21 | Cement polymer mortar for reinforcing and repairing concrete |
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| CN2008102246119A CN101412609B (en) | 2008-10-21 | 2008-10-21 | Cement polymer mortar for reinforcing and repairing concrete |
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| CN101412609B true CN101412609B (en) | 2011-05-11 |
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012023874A2 (en) | 2010-03-25 | 2012-02-23 | S.C. Global Center Of Ecological Research S.R.L. | Composition of cement-polymers composite mixture, process for obtaining this composition, process for application the composition of cement-polymers composite mixture and uses of the composition of cement-polymers composite mixture |
| CN102211919B (en) * | 2011-05-09 | 2012-08-22 | 同济大学 | Acrylic ester emulsion modified cement base rapid repair mortar |
| CN102249629A (en) * | 2011-06-10 | 2011-11-23 | 上海三瑞高分子材料有限公司 | Acrylate emulsion modified cement-base repair mortar |
| CN103159438B (en) * | 2013-03-29 | 2015-03-18 | 上海克络蒂材料科技发展有限公司 | Low-viscosity flexible polymer cement and fiber reinforcement fireproof coiled material |
| CN104556848B (en) * | 2013-10-11 | 2017-04-26 | 中冶建筑研究总院有限公司 | Polymer spraying mortar and preparation method thereof |
| CN104556847B (en) * | 2013-10-11 | 2016-08-24 | 中冶建筑研究总院有限公司 | A kind of polymer plastic-blasting mortar and preparation method thereof |
| EP3071532A1 (en) * | 2013-11-22 | 2016-09-28 | Construction Research & Technology GmbH | Crack reducing admixture for cementitious compositions |
| CN104328924B (en) * | 2014-11-03 | 2015-08-12 | 中冶建筑研究总院有限公司 | Reinforced concrete structure part method is carried out with fiber mesh muscle and early strong strength self-compaction mortar |
| CN104727567B (en) * | 2015-02-10 | 2017-03-01 | 中国矿业大学 | A kind of method of the TRC reinforcing square post improving fiber knitted net and fine concrete bonding |
| CN105735935B (en) * | 2016-03-07 | 2018-06-22 | 平顶山市安泰华矿用安全设备制造有限公司 | A kind of firedamp taking-out discharging drilling hole-sealing technology |
| CN106986586B (en) * | 2017-04-26 | 2019-01-29 | 北京市中超混凝土有限责任公司 | Low-shrinkage and high-strength self-compacting concrete and preparation method thereof |
| CN107265978A (en) * | 2017-06-28 | 2017-10-20 | 防城港市长歧水利管理所 | A kind of mortar repaired for hydraulic engineering and preparation method thereof |
| CN107151511B (en) * | 2017-06-29 | 2019-07-19 | 齐鲁交通发展集团有限公司日照分公司 | A kind of concrete guardrail anti-collision wall breakage renovation agent and renovation technique |
| CN110698134A (en) * | 2019-10-09 | 2020-01-17 | 广东宝通玻璃钢有限公司 | Vinyl ester resin polymer cement mortar |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1982250A (en) * | 2005-12-16 | 2007-06-20 | 同济大学 | Cheap high-flexibility plaster gluing slurry and its production |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1982250A (en) * | 2005-12-16 | 2007-06-20 | 同济大学 | Cheap high-flexibility plaster gluing slurry and its production |
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