CN104829197A - Bridge floor-repair aqueous polyurethane polymer-modified mortar and preparation method thereof - Google Patents
Bridge floor-repair aqueous polyurethane polymer-modified mortar and preparation method thereof Download PDFInfo
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- 229920002635 polyurethane Polymers 0.000 title claims abstract description 40
- 239000004814 polyurethane Substances 0.000 title claims abstract description 40
- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 59
- 229920000642 polymer Polymers 0.000 claims abstract description 31
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 19
- 238000003756 stirring Methods 0.000 claims abstract description 18
- 239000010881 fly ash Substances 0.000 claims abstract description 11
- 239000004576 sand Substances 0.000 claims abstract description 10
- 239000011398 Portland cement Substances 0.000 claims abstract description 9
- 239000002956 ash Substances 0.000 claims abstract 4
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical compound O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims 3
- 229910052710 silicon Inorganic materials 0.000 claims 3
- 239000010703 silicon Substances 0.000 claims 3
- 239000007859 condensation product Substances 0.000 claims 2
- 238000001035 drying Methods 0.000 claims 1
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 abstract description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 11
- 229910021487 silica fume Inorganic materials 0.000 abstract description 9
- 239000002994 raw material Substances 0.000 abstract description 7
- 239000004567 concrete Substances 0.000 description 9
- 239000000839 emulsion Substances 0.000 description 5
- 230000002787 reinforcement Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000011083 cement mortar Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- RRDQTXGFURAKDI-UHFFFAOYSA-N formaldehyde;naphthalene-2-sulfonic acid Chemical compound O=C.C1=CC=CC2=CC(S(=O)(=O)O)=CC=C21 RRDQTXGFURAKDI-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000006004 Quartz sand Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229920005906 polyester polyol Polymers 0.000 description 2
- 229920006264 polyurethane film Polymers 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 208000002599 Smear Layer Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011433 polymer cement mortar Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Landscapes
- Bridges Or Land Bridges (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
本发明提供的是一种水性聚氨酯聚合物改性砂浆及制备方法。原料组分包括普通硅酸盐水泥、中砂、粉煤灰、硅灰、萘系减水剂、水性聚氨酯以及水；在常温下，先将干燥的中砂和普通硅酸盐水泥、粉煤灰、硅灰加入到搅拌机中，搅拌，然后加入水性聚氨酯，继续搅拌，接着加入水，搅拌，最后加入萘系减水剂搅拌匀。本发明的添加水性聚氨酯的砂浆，可以修补桥面裂缝，解决接缝损坏和桥面磨损等问题。达到改善桥梁结构耐久性，保持桥梁结构良好工作性能的目的。The invention provides a water-based polyurethane polymer modified mortar and a preparation method. The raw material components include ordinary Portland cement, medium sand, fly ash, silica fume, naphthalene-based water reducer, water-based polyurethane and water; Add ash and silica fume to the mixer, stir, then add water-based polyurethane, continue to stir, then add water, stir, and finally add naphthalene-based water reducer and stir well. The mortar added with water-based polyurethane of the present invention can repair bridge deck cracks and solve problems such as seam damage and bridge deck wear. To achieve the purpose of improving the durability of the bridge structure and maintaining the good working performance of the bridge structure.
Description
技术领域technical field
本发明涉及的是一种建筑材料，特别是一种能够进行桥面修补的水性聚氨酯聚合物改性砂浆。本发明也涉及一种能够进行桥面修补的水性聚氨酯聚合物改性砂浆的制备方法。The invention relates to a building material, in particular to a water-based polyurethane polymer modified mortar capable of repairing bridge decks. The invention also relates to a preparation method of water-based polyurethane polymer modified mortar capable of bridge deck repair.
背景技术Background technique
桥面是桥梁结构的一个重要组成部分，桥面的耐久性直接影响桥梁结构的耐久性。但是由于桥梁处于复杂的环境下，长时间受海水，除冰盐的氯离子侵蚀，因此桥面会不可避免地产生裂缝，接缝损坏和桥面磨损等问题。过去，人们修补损坏桥面所采用的方法是在桥面裂缝处灌注沥青以封闭裂缝，或者加铺一层普通水泥砂浆，这仅是应急措施，不能从根本上解决混凝土桥面的修复问题。如果采用水泥砂浆或者沥青作为修补材料，由于它们与旧混凝土的粘结性能比较差，会产生壳，裂缝等现象，必须重新修补。从而造成人力和财力的浪费。因此选择适当的修补材料，是保证桥面修补质量的关键。桥面修补水性聚氨酯聚合物改性砂浆良好的粘结性能以及与旧混凝土良好的相容性，因此有望成为了桥面修补的重要材料。The bridge deck is an important part of the bridge structure, and the durability of the bridge deck directly affects the durability of the bridge structure. However, due to the complex environment of the bridge, which has been eroded by seawater and chloride ions of deicing salt for a long time, problems such as cracks, joint damage and bridge deck wear will inevitably occur on the bridge deck. In the past, people repaired the damaged bridge deck by pouring asphalt into the cracks of the bridge deck to seal the cracks, or adding a layer of ordinary cement mortar. This is only an emergency measure and cannot fundamentally solve the problem of repairing the concrete bridge deck. If cement mortar or asphalt is used as the repair material, due to their poor bonding performance with the old concrete, shells, cracks, etc. will occur, and must be repaired again. Thereby causing waste of manpower and financial resources. Therefore, the selection of appropriate repair materials is the key to ensure the quality of bridge deck repair. Waterborne polyurethane polymer modified mortar for bridge deck repair has good bonding performance and good compatibility with old concrete, so it is expected to become an important material for bridge deck repair.
目前国内外已经有许多关于桥面修补聚合物改性砂浆的研究，并有对于该技术研究和分析的文献报道：《高强不锈钢绞线网-高强渗透性聚合物砂浆与钢板箍复合加固技术在桥梁中的应用》(施工技术,2011,06:18-20.)中，提到的聚合物砂浆仅仅是采用渗透性聚合物砂浆，对桥梁的加固方法是利用高强不锈钢绞线网-高强渗透性聚合物砂浆加固与钢板箍加同相结合的复合加固法。《聚合物砂浆在混凝土表面修补中应用》(低温建筑技术,2005,01:113-115.)中，采用的是添加丙烯酸脂共聚乳液的聚合物修补砂浆。《SPC聚合物砂浆在水工混凝土修补中的应用》(西北水电,2010,05:33-34+44.)中，介绍的SPC聚合物砂浆是将高分子聚合物乳液(简称胶料)与由水泥、石英砂、膨胀剂等组成的干混砂浆(简称粉料)按一定比例拌和而成的一种聚合物水泥砂浆。公开号为CN 1746128的专利文件中公开的“水系聚氨酯砂浆组合物”中，提到的水系聚氨酯砂浆是由水分散型聚酯多醇、聚酯多醇、着色剂、硅砂、熟石灰等原料按照一定的比例配制而成，主要是用于地板表面的涂抹层，来减少地板表层的翘曲、裂纹，从而保证地板的耐热性、耐水性以及耐冲击性。公开号为CN101857416A的专利文件中公开的“聚合物乳液改性快速修补砂浆及其制备方法”中，提到的聚合物乳液快速修补砂浆是由丙烯酸乳液、消泡剂、硫铝酸盐早强水泥、石英砂、高效减水剂、早强剂、暖凝剂、聚丙烯纤维组成。At present, there have been many studies on polymer modified mortar for bridge deck repair at home and abroad, and there are literature reports on the research and analysis of this technology: "High-strength stainless steel strand mesh-high-strength permeable polymer mortar and steel hoop composite reinforcement technology in In "Application in Bridges" (Construction Technology, 2011, 06:18-20.), the polymer mortar mentioned is only the use of permeable polymer mortar, and the reinforcement method for bridges is to use high-strength stainless steel strand mesh-high-strength penetration It is a composite reinforcement method combining permanent polymer mortar reinforcement and steel hoop reinforcement. In "Application of Polymer Mortar in Concrete Surface Repair" (Low Temperature Construction Technology, 2005, 01:113-115.), the polymer repair mortar added with acrylate copolymer emulsion is used. In "Application of SPC Polymer Mortar in Hydraulic Concrete Repair" (Northwest Hydropower, 2010, 05:33-34+44.), the SPC polymer mortar introduced is a combination of polymer emulsion (referred to as rubber) and It is a kind of polymer cement mortar made by mixing dry-mixed mortar (referred to as powder) composed of cement, quartz sand, expansion agent, etc. in a certain proportion. In the "water-based polyurethane mortar composition" disclosed in the patent document CN 1746128, the mentioned water-based polyurethane mortar is made of water-dispersed polyester polyol, polyester polyol, colorant, silica sand, slaked lime and other raw materials according to It is prepared in a certain proportion and is mainly used for the smear layer on the floor surface to reduce the warping and cracks of the floor surface, so as to ensure the heat resistance, water resistance and impact resistance of the floor. In the "polymer emulsion modified quick repair mortar and its preparation method" disclosed in the patent document CN101857416A, the polymer emulsion quick repair mortar mentioned is made of acrylic emulsion, defoamer, sulfoaluminate early strength It is composed of cement, quartz sand, high-efficiency water reducing agent, early strength agent, warming agent, and polypropylene fiber.
发明内容Contents of the invention
本发明的目的在于提供一种能改善桥梁结构耐久性，保持桥梁结构良好工作性能的目的桥面修补水性聚氨酯聚合物改性砂浆。本发明的目的还在于提供一种桥面修补水性聚氨酯聚合物改性砂浆的制备方法。The purpose of the present invention is to provide a water-based polyurethane polymer modified mortar for repairing bridge decks which can improve the durability of the bridge structure and maintain the good working performance of the bridge structure. The object of the present invention is also to provide a preparation method of water-based polyurethane polymer modified mortar for bridge deck repair.
本发明的水性聚氨酯聚合物改性砂浆是由普通硅酸盐水泥、中砂、粉煤灰、硅灰、萘系减水剂、水性聚氨酯以及水制成,各组分的重量配比为：17％～19.1％、66.7％～68.7％、2.1％～3.8％、1.3％～1.7％、0.2％～0.25％、5.1％～7.7％，2.9％～3.45％。The water-based polyurethane polymer modified mortar of the present invention is made of ordinary Portland cement, medium sand, fly ash, silica fume, naphthalene-based water reducer, water-based polyurethane and water, and the weight ratio of each component is: 17%-19.1%, 66.7%-68.7%, 2.1%-3.8%, 1.3%-1.7%, 0.2%-0.25%, 5.1%-7.7%, 2.9%-3.45%.
所述萘系减水剂是β—萘磺酸甲醛缩合物为主要成分的混凝土减水剂。The naphthalene-based water reducer is a concrete water reducer mainly composed of β-naphthalenesulfonic acid formaldehyde condensate.
所述水性聚氨酯是含固量为35％的水性聚氨酯。The water-based polyurethane is water-based polyurethane with a solid content of 35%.
本发明的水性聚氨酯聚合物改性砂浆的制备方法为：The preparation method of waterborne polyurethane polymer modified mortar of the present invention is:
原料组分包括普通硅酸盐水泥、中砂、粉煤灰、硅灰、萘系减水剂、水性聚氨酯以及水制成,各组分的重量配比为：17％～19.1％、66.7％～68.7％、2.1％～3.8％、1.3％～1.7％、0.2％～0.25％、5.1％～7.7％，2.9％～3.45％；The raw material components include ordinary Portland cement, medium sand, fly ash, silica fume, naphthalene-based water reducer, water-based polyurethane and water. The weight ratio of each component is: 17% to 19.1%, 66.7% ~68.7%, 2.1%~3.8%, 1.3%~1.7%, 0.2%~0.25%, 5.1%~7.7%, 2.9%~3.45%;
在常温下，先将干燥的中砂和普通硅酸盐水泥、粉煤灰、硅灰加入到搅拌机中，搅拌2min，然后加入水性聚氨酯，继续搅拌1min，接着加入水，搅拌2min，最后加入萘系减水剂搅拌匀。At room temperature, first add dry medium sand, ordinary Portland cement, fly ash, and silica fume into the mixer, stir for 2 minutes, then add water-based polyurethane, continue stirring for 1 minute, then add water, stir for 2 minutes, and finally add naphthalene Water reducer and stir well.
本发明的添加水性聚氨酯的砂浆，可以修补桥面裂缝，解决接缝损坏和桥面磨损等问题。达到改善桥梁结构耐久性，保持桥梁结构良好工作性能的目的。The mortar added with water-based polyurethane of the present invention can repair bridge deck cracks and solve problems such as seam damage and bridge deck wear. To achieve the purpose of improving the durability of the bridge structure and maintaining the good working performance of the bridge structure.
本发明提供的水性聚氨酯聚合物改性砂浆，与传统的普通水泥砂浆相比具有以下优点：The water-based polyurethane polymer modified mortar provided by the invention has the following advantages compared with traditional common cement mortar:
第一、强度高。水性聚氨酯薄膜形成于浆体—集料界面上，可以增强集料和浆体之间的粘结力。同时由于薄膜有较高的相对强度和抗拉韧度，因此可以大大改善聚合物砂浆的力学性能。其压缩强度为43～50MPa，拉伸强度为5～7MPa，弯曲强度为8～10MPa。First, high strength. The water-based polyurethane film is formed on the slurry-aggregate interface, which can enhance the bonding force between the aggregate and the slurry. At the same time, because the film has high relative strength and tensile toughness, it can greatly improve the mechanical properties of polymer mortar. Its compressive strength is 43-50MPa, its tensile strength is 5-7MPa, and its bending strength is 8-10MPa.
第二、耐久性好。由于水性聚氨酯形成薄膜的毛细孔能阻止水的吸收和渗透，从而有效防止腐蚀介质的进入。其次，抗裂能力的提高减少微裂缝网格的形成，阻止了水分的传输。最后，加入粉煤灰和硅灰，改变了砂浆中的孔径分布，使大孔明显减少，从而保证了渗透性大大得到改善，耐久性得到了提高。Second, good durability. The capillary pores formed by the water-based polyurethane film can prevent the absorption and penetration of water, thus effectively preventing the entry of corrosive media. Second, the improved crack resistance reduces the formation of a grid of micro-cracks, preventing moisture transport. Finally, by adding fly ash and silica fume, the pore size distribution in the mortar is changed, and the large pores are significantly reduced, thereby ensuring that the permeability is greatly improved and the durability is improved.
第三、制备工艺简单，施工方便，耐磨性能优良。Third, the preparation process is simple, the construction is convenient, and the wear resistance is excellent.
第四、由于添加水性聚氨酯的原因，大大改善了水性聚氨酯聚合物改性砂浆与原有水泥混凝土之间的粘结能力。Fourth, due to the addition of water-based polyurethane, the bonding ability between the water-based polyurethane polymer modified mortar and the original cement concrete is greatly improved.
第五、采用粉煤灰和硅灰为原料，因此不仅变废为宝，降低成本，还有利于环境保护。Fifth, fly ash and silica fume are used as raw materials, so it not only turns waste into wealth, reduces costs, but also benefits environmental protection.
第六、应用广泛，本材料主要用于桥面裂缝的修补，解决接缝损坏以及桥面磨损的问题，还可以广泛运用在海工结构，地下建筑结构，道路以及港口工程的维修。Sixth, it is widely used. This material is mainly used for repairing bridge deck cracks to solve the problems of joint damage and bridge deck wear. It can also be widely used in the maintenance of marine structures, underground building structures, roads and port projects.
具体实施方式Detailed ways
下面举例对本发明做更详细的描述。The following examples describe the present invention in more detail.
实施例1：以52.5普通硅酸盐水泥、中砂、粉煤灰、硅灰、含固量为35％的水性聚氨酯、以β—萘磺酸甲醛缩合物为主要成分的混凝土高效减水剂以及水为原料，原料重量配比依次为：17％、66.7％、3.8％、1.7％、0.2％、7.7％，2.9％。在常温下，先将干燥的骨料和填料加入到搅拌机中，搅拌2min。然后加入水性聚氨酯，继续搅拌1min，直到所有的骨料被聚合物完全润湿。接着加入水，搅拌2min。最后加入萘系高效减水剂，将聚合物改性砂浆搅拌匀即可。拌合好的砂浆便可对修补区域进行铺设。Example 1: Concrete high-efficiency water reducer with 52.5 ordinary Portland cement, medium sand, fly ash, silica fume, water-based polyurethane with a solid content of 35%, and β-naphthalenesulfonic acid formaldehyde condensate as the main components And water is the raw material, and the weight ratio of raw materials is as follows: 17%, 66.7%, 3.8%, 1.7%, 0.2%, 7.7%, 2.9%. At room temperature, first add the dry aggregate and filler into the mixer, and stir for 2 minutes. Then add the water-based polyurethane and continue stirring for 1 min until all the aggregates are completely wetted by the polymer. Then water was added and stirred for 2 min. Finally, add naphthalene-based high-efficiency water reducer, and stir the polymer-modified mortar evenly. The repaired area can be paved with the mixed mortar.
实施例2：52.5普通硅酸盐水泥，中砂，粉煤灰，硅灰，含固量为35％的水性聚氨酯,以β—萘磺酸甲醛缩合物为主要成分的混凝土高效减水剂，以及水这几种原料，按照重量配比依次为：19.1％、68.7％、2.1％、1.3％、0.25％、5.1％，3.45％。在常温下，先将干燥的骨料和填料加入到搅拌机中，搅拌2min。然后加入水性聚氨酯，继续搅拌1min，直到所有的骨料被聚合物完全润湿。接着加入水，搅拌2min。最后加入萘系高效减水剂，将聚合物改性砂浆搅拌匀即可。拌合好的砂浆便可对修补区域进行铺设。Example 2: 52.5 ordinary Portland cement, medium sand, fly ash, silica fume, water-based polyurethane with a solid content of 35%, and a concrete high-efficiency water reducer with β-naphthalenesulfonic acid formaldehyde condensate as the main component, And these several kinds of raw materials of water, according to the proportion of weight: 19.1%, 68.7%, 2.1%, 1.3%, 0.25%, 5.1%, 3.45%. At room temperature, first add the dry aggregate and filler into the mixer, and stir for 2 minutes. Then add the water-based polyurethane and continue stirring for 1 min until all the aggregates are completely wetted by the polymer. Then water was added and stirred for 2 min. Finally, add naphthalene-based high-efficiency water reducer, and stir the polymer-modified mortar evenly. The repaired area can be paved with the mixed mortar.
上述实施例是对本发明的进一步说明，但不限制本发明。The above-mentioned embodiments are further illustrations of the present invention, but do not limit the present invention.
Claims (6)
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| CN110891915A (en) * | 2017-08-22 | 2020-03-17 | Sika技术股份公司 | Mortar containing polyurethane dispersions having ethylene oxide units |
| CN111233406A (en) * | 2020-01-20 | 2020-06-05 | 湘潭大学 | A kind of polymer matrix composite material for reinforcement of earth-rock dam and preparation method thereof |
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| CN111233406A (en) * | 2020-01-20 | 2020-06-05 | 湘潭大学 | A kind of polymer matrix composite material for reinforcement of earth-rock dam and preparation method thereof |
| CN111333389A (en) * | 2020-04-01 | 2020-06-26 | 哈尔滨工业大学(深圳)(哈尔滨工业大学深圳科技创新研究院) | High-damping modified cement mortar and preparation method and application thereof |
| CN112321235A (en) * | 2020-11-16 | 2021-02-05 | 桂林理工大学 | A kind of air-entraining thermal insulation mortar and preparation method thereof |
| CN113087464A (en) * | 2021-03-30 | 2021-07-09 | 重庆沥智路桥工程有限公司 | Water-based high-toughness sidewalk for visually impaired people mortar, preparation method and sidewalk for visually impaired people brick |
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