混凝土变形缝中双组分水溶性聚氨酯材料的性能试验研究
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摘要
双组分水溶性聚氨酯材料是由多异氰酸酯和多羟基化合物反应而成,是一种适于潮湿基底粘结、防渗堵漏能力较强的材料,属于聚氨基甲酸类的高聚物,可与多种材料粘合,广泛应用于混凝土变形缝的界面处理,或者作为修补材料、防水材料应用于路桥工程以及面板堆石坝的伸缩缝。
本论文通过试验研究混凝土变形缝中双组分水溶性聚氨酯材料的力学性能及防水性能,为工程应用提供资料与科学依据：
(1)通过相关试验确定水溶性聚氨酯预聚体与固化剂的最佳配合比,为力学性能及防水性能试验提供保障；
(2)双组分水溶性聚氨酯材料的性能试验可分为三部分：一是通过对水溶性聚氨酯物理性能的研究,初步了解其基本性质,为水溶性聚氨酯的应用提供条件：第二,以混凝土变形缝中水溶性聚氨酯材料的抗剪、抗拉等力学性能研究为基础,并对试件破坏形态进行分析,为面板堆石坝变形缝(周边缝、伸缩缝、垂直缝)的不均匀沉降等引起的剪切变形提供参考依据；第三,通过模拟试验,研究水溶性聚氨酯止水材料在混凝土变形缝处的可靠性和止水效果。
(3)分析水溶性聚氨酯粘结混凝土的机理,并结合实际工程,研究水溶性聚氨酯的应用。
试验结果表明：混凝土变形缝中水溶性聚氨酯材料受到剪切力及拉力作用时,它的变形将经历类似弹性、屈服和破坏阶段；在受到压力水作用下,聚氨酯材料能承受一定的水压力,并保持混凝土变形缝防渗体系的完整。因此,聚氨酯对混凝土变形缝的适应性、止水效果,以及简易的施工性能,可加以有效利用。
The water-soluble polyurethane is responds by the polyisocyanate and polyhydroxy,which belongs to the polyurethane class of the high polymer,which has strongly anti-blocking ability,which is suitable for the concrete's moist basis surface. As the patching material and anti-seepage material,it can adhesive with many kinds of materials, widely uses in the concrete's interface, applies in the road-bridge engineering and the deformed crack of the Faced Rock-fill Dam.
This paper researchs the polyurethane's mechanical properties and anti-seepage properties in the concrete's deformation joint through the experimental, and provids the material and the scientific basis for the project:
Firstly,determined the water-soluble polyurethane prepolymer and curing agent with the best mixture in order to build the foundation about mechanical properties and anti-seepage properties.
Secondly, mechanical properties experimental study Can be divided into three parts:First, it is important to understand its physical Mechanical properties that provides the condition for the application;Second, it studies on the shear capacity and tensile mechanical properties of the adhesion by the water-soluble polyurethane and concrete's deformation joint. According to the sample, analyzed the patterns of damage and provided a reference for the actual and theoretical foundation, and solved the main Faced Rock-fill Dam of the deformed concrete crack (Peripheral joint, Expansion joint, vertical fracture). Third, when the concrete's deformation joint occurs Large deformation, the water-soluble polyurethane material alone uses whether has the reliability and the waterproof effects.
Finally, researched the polyurethane's useful by analysising the adhesion mechanism and relating the actual project.
The result indicates that the water-soluble polyurethane material has the elastic, the submits and the destruction stage on the shearing force and the pulling force function;Under the certain hydraulic pressure conditions, the water-soluble polyurethane can withstand certain hydraulic pressure,and maintain the integrity of the anti-permeability system. Therefore, it is so adaptability, effect and simple construction performance that can be used effectively in the concrete's deformation joint.
本论文通过试验研究混凝土变形缝中双组分水溶性聚氨酯材料的力学性能及防水性能,为工程应用提供资料与科学依据：
(1)通过相关试验确定水溶性聚氨酯预聚体与固化剂的最佳配合比,为力学性能及防水性能试验提供保障；
(2)双组分水溶性聚氨酯材料的性能试验可分为三部分：一是通过对水溶性聚氨酯物理性能的研究,初步了解其基本性质,为水溶性聚氨酯的应用提供条件：第二,以混凝土变形缝中水溶性聚氨酯材料的抗剪、抗拉等力学性能研究为基础,并对试件破坏形态进行分析,为面板堆石坝变形缝(周边缝、伸缩缝、垂直缝)的不均匀沉降等引起的剪切变形提供参考依据；第三,通过模拟试验,研究水溶性聚氨酯止水材料在混凝土变形缝处的可靠性和止水效果。
(3)分析水溶性聚氨酯粘结混凝土的机理,并结合实际工程,研究水溶性聚氨酯的应用。
试验结果表明：混凝土变形缝中水溶性聚氨酯材料受到剪切力及拉力作用时,它的变形将经历类似弹性、屈服和破坏阶段；在受到压力水作用下,聚氨酯材料能承受一定的水压力,并保持混凝土变形缝防渗体系的完整。因此,聚氨酯对混凝土变形缝的适应性、止水效果,以及简易的施工性能,可加以有效利用。
The water-soluble polyurethane is responds by the polyisocyanate and polyhydroxy,which belongs to the polyurethane class of the high polymer,which has strongly anti-blocking ability,which is suitable for the concrete's moist basis surface. As the patching material and anti-seepage material,it can adhesive with many kinds of materials, widely uses in the concrete's interface, applies in the road-bridge engineering and the deformed crack of the Faced Rock-fill Dam.
This paper researchs the polyurethane's mechanical properties and anti-seepage properties in the concrete's deformation joint through the experimental, and provids the material and the scientific basis for the project:
Firstly,determined the water-soluble polyurethane prepolymer and curing agent with the best mixture in order to build the foundation about mechanical properties and anti-seepage properties.
Secondly, mechanical properties experimental study Can be divided into three parts:First, it is important to understand its physical Mechanical properties that provides the condition for the application;Second, it studies on the shear capacity and tensile mechanical properties of the adhesion by the water-soluble polyurethane and concrete's deformation joint. According to the sample, analyzed the patterns of damage and provided a reference for the actual and theoretical foundation, and solved the main Faced Rock-fill Dam of the deformed concrete crack (Peripheral joint, Expansion joint, vertical fracture). Third, when the concrete's deformation joint occurs Large deformation, the water-soluble polyurethane material alone uses whether has the reliability and the waterproof effects.
Finally, researched the polyurethane's useful by analysising the adhesion mechanism and relating the actual project.
The result indicates that the water-soluble polyurethane material has the elastic, the submits and the destruction stage on the shearing force and the pulling force function;Under the certain hydraulic pressure conditions, the water-soluble polyurethane can withstand certain hydraulic pressure,and maintain the integrity of the anti-permeability system. Therefore, it is so adaptability, effect and simple construction performance that can be used effectively in the concrete's deformation joint.
引文
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[8]Shi.Yuanchang(Coll.of.Materials Science and Engine,Shandong University),Wu Youshi,Zhu Zhiqian.Modification of aqueous acrylic-polyurethane via epoxy resin postcrosslinking[J].Journal of Applied Polymer Science.2003,88 (2):470-475
[9]李绍雄,刘益军.聚氨酯胶粘剂[M].北京：化学工业出版社,1998
[10]张辉,沈慧芳,黄洪,黎永津,陈焕钦.水性聚氨酯涂料的发展概况.化学工业与工程[J],2004,21(4)：297-299
[11]刘芳,吴小华,贾德民.水性聚氨醋的交联改性技术[R].合成橡胶工业,2001,(1)：60-62
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[22]郭琦,钱文浩,朱吕民.双组分水性聚氨酯胶粘剂的合成与应用[M].聚氨酯工业.2220,17(1)
[23]张立武.水基胶粘剂[M].北京：化学工业出版社,2002
[24]张庆思,曾庆荣,反应型单组分聚氨酯水分散体的制备及性能[C].石油化 工,2000,(29)：263-265
[25]卿宁等.涂料工业,1999年28卷(7)：5-10
[26]D.DIETEFJCH.Progressin Coatings,1981 (9):281-340
[27]李绍雄,刘益军.聚氨酯树脂及其应用[M].北京：化学工业出版社,2002
[28]德G.厄特儿.聚氨醋手册[M].北京：中国石油化工出版社,1985：25-28
[29]Loraze Obudde V.,Reinmoller K.H.,Polyurethanes Makqomal Chem,1980, (87):35-38
[30]Bolton.j.s, Green.E.R..normal.incidence.sound.transmission.through double panel systems lined with relatively partially reticulated polyurethane foam.Applied Acoustics.1993,39 (1):23-51
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[33]许戈文,熊潜生,王彤等.交联型聚氨酯乳液的研究[C].聚氨酯工业.1997,12(3)：14
[34]Wu Youshi, Zhu.Zhiqian.Modification of aqueous acrylic-polyurethane viaepoxy resin postcross linking. Journal of applied polymer science.2003,88 (2):470-475
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