CN105948651A - High strength polymer cement mortar with self-curing function - Google Patents
High strength polymer cement mortar with self-curing function Download PDFInfo
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- CN105948651A CN105948651A CN201610299968.8A CN201610299968A CN105948651A CN 105948651 A CN105948651 A CN 105948651A CN 201610299968 A CN201610299968 A CN 201610299968A CN 105948651 A CN105948651 A CN 105948651A
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- Prior art keywords
- cement mortar
- water
- self
- polymer cement
- strength
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Classifications
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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
- C04B2111/723—Repairing reinforced concrete
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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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 high strength polymer cement mortar with self-curing function. The high strength polymer cement mortar is prepared from the following raw materials by weight: 450-550 parts of a cementing material, 450-550 parts of fine aggregate, 40-60 parts of polymer powder, 3-5 parts of a water reducing agent, 1-2 parts of a defoaming agent, water-absorbent resin powder accounting for 0.1-0.2% of the weight of the cementing material and water accounting for 13-17% of the total weight of the six raw materials. The high strength polymer cement mortar provided by the invention has the curing-free characteristic, i.e. the mechanical properties of the material and the bonding strength of old concrete can be guaranteed without watering curing in the use process, and also the maintenance and reinforcement effects of reinforced concrete bridges can be effectively guaranteed.
Description
Technical field
The invention belongs to building material technical field, be specifically related to a kind of high-strength polymer cement with Self-curing function
Mortar, particularly relates to a kind of Self-curing high-strength polymer water silt particle being applied in Reinforced Concrete Bridge repairing and reinforcing engineering
Slurry.
Background technology
High-strength polymer cement mortar have excellence comprcssive strength, rupture strength and old concrete adhesion strength with
And the feature such as excellent impermeability, frost resistance and malleable, it is widely used in repairing and the reinforcing engineering of Reinforced Concrete Bridge
In.But in the repairing and reinforcing engineering of Reinforced Concrete Bridge, due to special application, complicated structure position or
Lacking the construction environment at water source, conventional maintaining process is difficult to carry out, it is impossible to ensure that high-strength polymer cement mortar is supported normally
There is the phenomenon decreased in guard strip part, the mechanical property of high-strength polymer cement mortar and the adhesion strength with old concrete,
Directly affect repairing and the consolidation effect of Reinforced Concrete Bridge.
Summary of the invention
Present invention aim to overcome that prior art defect, it is provided that a kind of high-strength polymer cement with Self-curing function
Mortar, this cement mortar has the advantages that to exempt from health preserving, and i.e. it in use also can ensure the power of material without health preserving of sprinkling water
Learn performance and the adhesion strength with old concrete, maintenance and the consolidation effect of Reinforced Concrete Bridge can be effectively ensured.
For achieving the above object, the present invention adopts the following technical scheme that
A kind of high-strength polymer cement mortar with Self-curing function, it is prepared from the following raw materials in parts by weight: gelling material
Material 450-550 part, fine aggregate 450-550 part, polymer powder 40-60 part, water reducer 3-5 part, defoamer 1-2 part, with
And account for the water-absorbent resin powder of Binder Materials weight 0.1-0.2% and account for the water of aforementioned six kinds of raw material weight sums 13-17% (i.e.
Water consumption is the 13-17% of high-strength polymer cement mortar dry powder gross weight).
Concrete, described Binder Materials comprises the following raw materials by weight percent: Portland cement 50-65%,
Quick hardening sulphoaluminate cement 15-30%, flyash 10-20% and slag powders 10-20%.
Concrete, described Portland cement strength grade be 42.5 grades and more than, described quick hardening sulphoaluminate cement
Strength grade is 42.5 grades, and described flyash is first level flour coal ash, and described slag powders is S95 level and ratings above slag powders.
Further, described fine aggregate is quartz sand or fluvial sand, and grain composition is in IIth district, and modulus of fineness is 2.5-2.8.
Further, described polymer powder is vinyl copolymer powder or cinnamic acrylic ester copolymerization
Thing powder, can directly buy common commercially available prod.
Further, described water reducer is preferably polycarboxylate high performance water-reducing agent, can directly buy common commercially available prod.
Further, described defoamer is preferably silicone defoamer.
Described water-absorbing resin is acrylic acid methyl ester .-vinyl acetate co-polymer or the polymerization of cyclic acid anhydride modified polyvinylalcohol
Thing, fineness is 100-200 mesh, saturated Ca (OH)2In solution, water absorbent rate is 30-50 times, can directly buy common commercially available product
Product.
The present invention by add water-absorbing resin the performance of high-strength polymer cement mortar is modified, by water-absorbing resin,
Polymer powder is combined with high-strength mortar, have developed a kind of high-strength polymer cement mortar with Self-curing function, solves
Determined existing mortar in the problem that Reinforced Concrete Bridge is repaired and present in reinforcement application, health preserving is not enough.High-strength poly-with common
Compound cement mortar is compared, have exempt from health preserving, stable mechanical property and with old concrete adhesion strength advantages of higher, i.e. it makes
During with without health preserving of sprinkling water also can ensure material mechanical property and with the adhesion strength of old concrete, can be effectively ensured
Reinforced Concrete Bridge maintenance and the effect reinforced.
Compared to the prior art, beneficial effects of the present invention:
The present invention is applied to the maintenance of old Reinforced Concrete Bridge and the high-strength polymer cement mortar of Self-curing 1 of reinforcing engineering)
Have the advantages that to exempt from health preserving, be applied to the not enough bridge maintaining of health-preserving condition and reinforcing engineering, high-strength polymerization can be effectively ensured
The mechanical property of thing mortar and the adhesion strength with old concrete thereof, be effectively improved the repairing of Reinforced Concrete Bridge and reinforce effect
Really, the service life of Reinforced Concrete Bridge is extended；2) decrease the health preserving link during polymer mortar uses, have aobvious
The economic and social benefit write.
Detailed description of the invention
Below in conjunction with embodiment, technical scheme is discussed in detail further, but protection scope of the present invention
It is not limited thereto.
In following embodiment, Portland cement strength grade is 42.5 grades, quick hardening sulphoaluminate cement strength grade
Being 42.5 grades, flyash is first level flour coal ash, and slag powders is S95 grade slag powder.Fine aggregate is quartz sand, and grain composition is in II
District, modulus of fineness is 2.7.Water reducer is polycarboxylate high performance water-reducing agent, purchased from east, Yueyang rain limited duty of rainbow waterproof technique
Ren company.Defoamer is silicone defoamer, purchased from watt gram chemistry (Chinese) company limited.Polymer powder is vinyl acetate
Ester-ethylene copolymer powder, purchased from watt gram chemistry (Chinese) company limited.Water-absorbing resin is acrylic acid methyl ester .-vinylacetate
Copolymer, purchased from Beijing Xitao Development Tech Co., Ltd..Without specified otherwise in Example formulations, refer both to weight portion.
Embodiment 1
Formula: Binder Materials 515 parts (Portland cement 300 parts, quick hardening sulphoaluminate cement 75 parts, 70 parts of flyash and
Slag powders 70 parts), fine aggregate (quartz sand) 450 parts, polymer powder (vinyl copolymer powder) 40 parts, subtract
3 parts of water preparation (polycarboxylate high performance water-reducing agent), defoamer (silicone defoamer) 1 part, water-absorbing resin (acrylic acid methyl ester .-
Vinyl acetate co-polymer) 0.6 part, water consumption is the 13% of high-strength polymer cement mortar dry powder gross weight.
Preparation method: weigh each raw material according to formula ratio respectively；Start dry powder mortar mixer, Binder Materials is gone up respectively
Enter blender and stir；Fine aggregate is dried in advance in drying plant more than 12h, then naturally cools to room temperature；Then
Blender will be entered respectively on fine aggregate, polymer powder, water reducer, defoamer and water-absorbent resin powder；Feeding process stirs
Machine is constantly in stirring, continues stirring 10min after feeding；Then add water continuation stirring 3min, and water consumption is mortar
The 13% of dry powder gross weight.Forming method and mechanical test method are with reference to " JGT289-2010 concrete structure reinforcement is polymerized
Thing mortar " perform, health-preserving condition is natural Health preservation.
Being removed by water-absorbing resin in above-mentioned formula, other material all weighs according to ratio in above-mentioned formula, press more than
Step is carried out, and makes contrast specimen a, b and c, and curing condition is respectively natural Health preservation, watering covers health preserving and Standard Curing.
Through test, the property indices of the high-strength polymer cement mortar of the embodiment of the present invention 1 gained is shown in Table 1.
Table 1 embodiment 1 performance test results
。
Embodiment 2
Formula: Binder Materials 515 parts (Portland cement 300 parts, quick hardening sulphoaluminate cement 75 parts, 70 parts of flyash and
Slag powders 70 parts), fine aggregate 450 parts, polymer powder 40 parts, water reducer 3 parts, defoamer 1 part, water-absorbing resin 0.8 part, use water
Amount is the 13% of high-strength polymer cement mortar dry powder gross weight.
Embodiment raw material, preparation method and experimental condition are same as in Example 1.
Through test, the embodiment of the present invention 2 gained high-strength polymer cement mortar property indices is shown in Table 2.
Table 2 embodiment 2 performance test results
。
Embodiment 3
Formula: Binder Materials 515 parts (Portland cement 300 parts, quick hardening sulphoaluminate cement 75 parts, 70 parts of flyash and
Slag powders 70 parts), fine aggregate 450 parts, polymer powder 40 parts, water reducer 3 parts, defoamer 1 part, water-absorbing resin 1.0 parts, use water
Amount is the 13% of high-strength polymer cement mortar dry powder gross weight.
Embodiment raw material, preparation method and experimental condition are same as in Example 1.
Through test, the embodiment of the present invention 3 gained high-strength polymer cement mortar property indices is shown in Table 3.
Table 3 embodiment 3 performance test results
。
Embodiment 4
Formula: Binder Materials 515 parts (Portland cement 300 parts, quick hardening sulphoaluminate cement 75 parts, 70 parts of flyash and
Slag powders 70 parts), fine aggregate 450 parts, polymer powder 40 parts, water reducer 3 parts, defoamer 1 part, selected many group water-absorbing resins are used
Amount, respectively 0.6 part (a), 0.8 part (b) and 1.0 parts (c), water consumption is the 15% of high-strength polymer cement mortar dry powder gross weight.
Embodiment raw material, preparation method and experimental condition are same as in Example 1.
Through test, the embodiment of the present invention 4 gained high-strength polymer cement mortar property indices is shown in Table 4.
Table 4 embodiment 4 performance test results
。
By the analysis of embodiment 1-4 result of the test can be obtained:
1) mobility of polymer mortar is affected notable by water-absorbing resin.When water consumption is identical, along with the increasing of water-absorbing resin volume
The fluidity of addition polymerization compound cement mortar presents obvious reduction trend, but the glutinous poly-property of polymer mortar mix obtains
Strengthen.High-strength polymer cement mortar is applied to need the fluidity of mortar less when Deteriorated concrete pavement works is repaired, and keeps away
After being excused from a college course benefit, there is trickling phenomenon in mortar, affects repair efficiency.Therefore, the interpolation of water-absorbing resin does not affect penetrative polymer mortar
Serviceability.
2) water-absorbing resin is notable to the Effect on Mechanical Properties of penetrative polymer mortar.Water consumption is high-strength polymer water silt particle
During paste dry powder weight 13%, the incorporation of water-absorbing resin significantly reduces 1d and 3d comprcssive strength and the rupture strength of polymer mortar,
Along with the change of water-absorbing resin volume, 1d age strength Changing Pattern is inconspicuous；During 28d age, mixed with the polymerization of water-absorbing resin
Thing mortar is apparently higher than the resistance to compression of natural curing test specimen and rupture strength, but its resistance to compression and rupture strength cover still less than watering
With Standard Curing test specimen.Thus illustrate, mixed with the penetrative polymer mortar of water-absorbing resin in natural curing condition (without watering)
Under there is good mechanical property, if possessing curing condition, still can use watering maintenance mode carry out health preserving, the power of mortar
Learn performance can be further improved.
3) having properly increased the water consumption of high-strength polymer cement mortar in embodiment 4, water consumption is that polymer mortar is done
The 15% of powder gross weight.By result of the test it is found that the penetrative polymer mortar early strength of identical water-absorbing resin volume and later stage
Intensity is obtained for significantly raising.This is owing to water-absorbing resin can absorb portion of water when mortar mixes and stirs, in certain journey
The water consumption that hydrated cementitious needs can be reduced on degree, thus, should fit when using the penetrative polymer mortar mixed with water-absorbing resin
When improving water consumption.
Can be obtained by test result analysis, under the conditions of natural curing, suitable water-absorbing resin volume and extra diversion
Amount can significantly improve the mechanical property of high-strength polymer cement mortar, and comprcssive strength maximum increase rate is up to 14%.
The invention is not limited in above-mentioned detailed description of the invention, those skilled in the art also can make multiple change accordingly,
But any with the present invention equivalent or similar change all should contain within the scope of the claims.
Claims (8)
1. a high-strength polymer cement mortar with Self-curing function, it is characterised in that by the raw material of following weight proportion
Make: Binder Materials 450-550 part, fine aggregate 450-550 part, polymer powder 40-60 part, water reducer 3-5 part, froth breaking
Agent 1-2 part, and account for the water-absorbent resin powder of Binder Materials weight 0.1-0.2% and account for aforementioned six kinds of raw material weight sums
The water of 13-17%.
The most according to claim 1, there is the high-strength polymer cement mortar of Self-curing function, it is characterised in that described gelling
Material comprises the following raw materials by weight percent: Portland cement 50-65%, quick hardening sulphoaluminate cement 15-30%,
Flyash 10-20% and slag powders 10-20%.
The most according to claim 2, there is the high-strength polymer cement mortar of Self-curing function, it is characterised in that described commonly
Portland cement strength grade be 42.5 grades and more than, described quick hardening sulphoaluminate cement strength grade is 42.5 grades, described powder
Coal ash is first level flour coal ash, and described slag powders is S95 level and ratings above slag powders.
The most according to claim 1, there is the high-strength polymer cement mortar of Self-curing function, it is characterised in that described thin collection
Material is quartz sand or fluvial sand, and grain composition is in IIth district, and modulus of fineness is 2.5-2.8.
The most according to claim 1, there is the high-strength polymer cement mortar of Self-curing function, it is characterised in that described polymerization
Thing powder is vinyl copolymer powder or copolymer in cinnamic acrylic ester powder.
The most according to claim 1, there is the high-strength polymer cement mortar of Self-curing function, it is characterised in that described diminishing
Agent is polycarboxylate high performance water-reducing agent.
The most according to claim 1, there is the high-strength polymer cement mortar of Self-curing function, it is characterised in that described froth breaking
Agent is silicone defoamer.
The most according to claim 1, there is the high-strength polymer cement mortar of Self-curing function, it is characterised in that described water suction
Resin is acrylic acid methyl ester .-vinyl acetate co-polymer or cyclic acid anhydride modified poly ethylene alkoxide polymer, and fineness is 100-200
Mesh.
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| CN201610299968.8A CN105948651A (en) | 2016-05-09 | 2016-05-09 | High strength polymer cement mortar with self-curing function |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107010868A (en) * | 2017-05-25 | 2017-08-04 | 汤始建华建材（苏州）有限公司 | A kind of concrete modifying agent |
| CN107902996A (en) * | 2017-11-28 | 2018-04-13 | 王德元 | A kind of fast hard interior maintenance mortar |
| CN110835249A (en) * | 2019-11-29 | 2020-02-25 | 浙江大学 | Ocean engineering rust-resisting and anti-cracking mortar and preparation and use methods thereof |
| CN112341110A (en) * | 2020-12-14 | 2021-02-09 | 甘肃省交通规划勘察设计院股份有限公司 | Early-high-strength self-leveling bridge pier column reinforcing mortar material |
| CN114349440A (en) * | 2022-01-17 | 2022-04-15 | 陕西秦汉恒盛新型建材科技股份有限公司 | Quick-setting, quick-hardening, early-strength and high-strength pavement patching material and preparation method thereof |
| CN115028409A (en) * | 2022-06-08 | 2022-09-09 | 新化县天马建筑新材料科技有限公司 | Old wall reconstruction mortar and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107010868A (en) * | 2017-05-25 | 2017-08-04 | 汤始建华建材（苏州）有限公司 | A kind of concrete modifying agent |
| CN107902996A (en) * | 2017-11-28 | 2018-04-13 | 王德元 | A kind of fast hard interior maintenance mortar |
| CN110835249A (en) * | 2019-11-29 | 2020-02-25 | 浙江大学 | Ocean engineering rust-resisting and anti-cracking mortar and preparation and use methods thereof |
| CN112341110A (en) * | 2020-12-14 | 2021-02-09 | 甘肃省交通规划勘察设计院股份有限公司 | Early-high-strength self-leveling bridge pier column reinforcing mortar material |
| CN114349440A (en) * | 2022-01-17 | 2022-04-15 | 陕西秦汉恒盛新型建材科技股份有限公司 | Quick-setting, quick-hardening, early-strength and high-strength pavement patching material and preparation method thereof |
| CN115028409A (en) * | 2022-06-08 | 2022-09-09 | 新化县天马建筑新材料科技有限公司 | Old wall reconstruction mortar and preparation method thereof |
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