Mechanical property of early-strength water-containing unsaturated polyurethane concrete
-
摘要: 为解决普通聚氨酯混凝土和易性差、固化快与成型控制困难等问题, 针对常见聚合物混凝土对骨料的高标准要求, 提出了一种新型含水不饱和聚氨酯混凝土。应用配比试验、强度试验、掺水量试验、浸泡试验和现场取样试验, 研究了含水不饱和聚氨酯混凝土的力学性能, 分析了材料性质、材料配比、温度与掺水量等因素对其力学性能的影响。分析结果表明: 当温度为10 ℃~20 ℃时, 可加不饱和聚氨酯用量15%~20%的水, 温度大于20 ℃时, 可加不饱和聚氨酯用量20%~30%的水, 现场工程应用和浸泡试验证明, 这种含水不饱和聚氨酯混凝土1d抗压强度为22.70 MPa, 长期浸泡后未发现软化与崩解现象, 因此, 含水不饱和聚氨酯混凝土性能稳定, 和易性好, 成型控制容易, 能够满足工程需要; 在15 ℃温度条件下, 推荐的基本配比为水泥、沙子、石子、ZK3、水、不饱和聚氨酯、引发剂与促进剂的质量比为1.000∶5.700∶7.300∶1.300∶0.080∶2.000∶0.050∶0.025。Abstract: To solve the problem of poor workability, fast curing and molding difficulty of common polyurethane concrete, a new water-containing unsaturated polyurethane concrete was proposed according to the requirement of high standards for aggregate in common polymer concrete.The mechanical properties of water-containing unsaturated polyurethane concrete were investigated by ratio test, strength test, water-mixed test, immersion test and field sampling test, and the effects of material properties, material ratio, temperature and moisture content on the mechanical properties were analyzed.Analysis result shows when the added amount of water is 15%-20% of unsaturated polyurethane at 10 ℃-20 ℃, the added amount of water is 20%-30% of unsaturated polyurethane above 20 ℃, the compressive strength of 1d for the water-containing unsaturated polyurethane concrete is 22.70 MPa in field engineering application and immersion test, and the phenomena of softening and disintegration are not found after long-term immersion.Obviously, the water-containing unsaturated polyurethane concrete has good stability, workability and formability that meet the engineering needs in the construction.At 15 ℃, the recommended massratio of cement, sand, stone, ZK3, water, unsaturated polyurethane, initiator, and accelerant is1.000∶5.700∶7.300∶1.300∶0.080∶2.000∶0.050∶0.025.
-
图 4 含水不饱和聚氨酯混凝土可行性试验结果
Figure 4. Feasibility test result of water-containing unsaturated polyurethane concrete
图 5 不同气温下对应的水与不饱和聚氨酯的比值
Figure 5. Ratios of water and unsaturated polyurethane at different temperatures
图 6 不同掺水量条件下混凝土强度参数
Figure 6. Intensity parameters of concretes with different weter contents
表 1 聚合物混凝土强度指标
Table 1. Strength indexes of polymer concretes
表 2 混凝土试验方案
Table 2. Experimental schemes of concrete
表 3 不饱和聚氨酯固化时间
Table 3. Curing times of unsaturated polyurethane
表 4 不饱和聚氨酯水泥砂浆测试方案
Table 4. Test schemes of unsaturated polyurethane cement mortar
表 5 含水不饱和聚氨酯混凝土可行性试验方案
Table 5. Feasibility test schemes of water-containing unsaturated polyurethane concrete
表 6 含水不饱和聚氨酯混凝土强度试验方案
Table 6. Test schemes of water-containing unsaturated polyurethane concrete's strength
表 7 添加剂对不饱和聚氨酯混凝土强度的影响
Table 7. Influence of additives on strength of unsaturated polyurethane cement
表 8 现场试验方案
Table 8. Field test schemes
-
[1] 韦灼彬, 王铁成, 高屹. 早强快硬聚氨酯混凝土的试验研究[J]. 混凝土, 2005(9): 58-64. https://www.cnki.com.cn/Article/CJFDTOTAL-HLTF200509014.htmWEI Zhuo-bin, WANG Tie-cheng, GAO Yi. Experiment on a type of polyurethane concrete possessing early strength and speedily solidification[J]. Concrete, 2005(9): 58-64. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-HLTF200509014.htm [2] MARZOCCHI A, ROBERTN G, BOLEN G E. Road pavement and repair: USA, US 4265563[P]. 1981-05-05. [3] CHATTOPADHYAY D K, RAJU K V S N. Structural engineering of polyurethane coatings for high performance applications[J]. Progress in Polymer Science, 2007, 32(3): 352-418. [4] OHAMA Y. Recent progress in concrete-polymer composites[J]. Advanced Cement Based Materials, 1997, 5(2): 31-40. doi: 10.1016/S1065-7355(96)00005-3 [5] SARVA S S, DESCHANEL S, BOYCE M C, et al. Stressstrain behavior of a polyurea and a polyurethane from low to high strain rates[J]. Polymer, 2007, 48(8): 2208-2213. doi: 10.1016/j.polymer.2007.02.058 [6] 彭全敏. 聚氨酯材料快速修补机场跑道的试验研究[D]. 天津: 天津大学, 2005.PENG Quan-min. Experiment research on rapid pavement repair of airfield runway by employing polyurethane materials[D]. Tianjin: Tianjin University, 2005. (in Chinese) [7] 高屹, 韦灼彬, 王铁成. 机场道面抢修用聚氨酯稳定集料的试验研究[J]. 海军工程大学学报, 2007, 19(3): 104-107. doi: 10.3969/j.issn.1009-3486.2007.03.024GAO Yi, WEI Zhuo-bin, WANG Tie-cheng. Experimental study on the polyurethane materials used for rapid repair of airfield pavement[J]. Journal of Naval University of Engineering, 2007, 19(3): 104-107. (in Chinese) doi: 10.3969/j.issn.1009-3486.2007.03.024 [8] 梁乃兴, 曹源文, 姚红云. 聚合物改性水泥混凝土路用性能研究[J]. 公路交通科技, 2005, 22(3): 21-23. doi: 10.3969/j.issn.1002-0268.2005.03.006LIANG Nai-xing, CAO Yuan-wen, YAO Hong-yun. Research on performance of cement concrete modified with styrene butadiene latex[J]. Journal of Highway and Transportation Research and Development, 2005, 22(3): 21-23. (in Chinese) doi: 10.3969/j.issn.1002-0268.2005.03.006 [9] 申爱琴. 水泥混凝土路面裂缝修补材料研究[D]. 西安: 长安大学, 2005.SHEN Ai-qin. Study on the crack mending materials of cement concrete pavement[D]. Xi'an: Chang'an University, 2005. (in Chinese) [10] 罗立峰. 钢纤维增强聚合物混凝土桥面铺装层修筑技术的研究[D]. 广州: 华南理工大学, 2002.LUO Li-feng. Construction technology of SFRPC bridge deck pavement[D]. Guangzhou: South China University of Technology, 2002. (in Chinese) [11] PATEL P S D, SHEPHERD D E T, HUKINS D W L. Compressive properties of commercially available polyurethane foams as mechanical models for osteoporotic human cancellous[J]. BMC Musculoskeletal Disorders, 2008, 9(1): 137-141. doi: 10.1186/1471-2474-9-137 [12] MOLINDA G. Reinforcing coal mine roof with polyurethane injection: 4 case studies[J]. Geotechnical and Geological Engineering, 2008, 26(5): 553-566. doi: 10.1007/s10706-008-9189-0 [13] LEE S H, WANG S, PHARR G M, et al. Evaluation of interphase properties in a cellulose fiber-reinforced polypropylene composite by nanoindentation and finite element analysis[J]. Composites Part A: Applied Science and Manufacturing, 2007, 38(6): 1517-1524. doi: 10.1016/j.compositesa.2007.01.007 [14] HOUSHYAR S, SHANK R A, HODZIC A. The effect of fiber concentration on mechanical and thermal properties of fiber-reinforced polypropylene composites[J]. Journal of Applied Polymer Science, 2005, 96(6): 2260-2272. doi: 10.1002/app.20874 [15] DAVIDOVITS J. Geopolymers: inorganic polymeric new materials[J]. Journal of Thermal Analysis, 1991, 37(8): 1633-1656. doi: 10.1007/BF01912193 [16] DAVIDOVITS J. Recent progresses in concretes for nuclear waste and uranium waste containment[J]. Concrete Intimation, 1994, 16(12): 53-58. [17] 张琳. 水泥混凝土路面快速修补材料的研究与开发[D]. 西安: 长安大学, 2011.ZHANG Lin. Study and develop on rapid repair materials of cement concrete pavements[D]. Xi'an: Chang'an University, 2011. (in Chinese) [18] STRAND D, MACDONALD C N, RAMAKRISHNAN V, et al. Construction applications of Polyolefin fiber reinforced concrete[C]//ASCE. Proceedings of ASCE 4th Materials Engineering Conference. Reston: ASCE, 1996: 103-112. [19] 彭小芹, 杨涛, 王开宇, 等. 地聚合物混凝土及其在水泥混凝土路面快速修补中的应用[J]. 西南交通大学学报, 2011, 46(2): 205-210. doi: 10.3969/j.issn.0258-2724.2011.02.005PENG Xiao-qin, YANG Tao, WANG Kai-yu, et al. Preparation of geopolymeric concrete and its application to rapid repair of cement concrete pavement[J]. Journal of Southwest Jiaotong University, 2011, 46(2): 205-210. (in Chinese) doi: 10.3969/j.issn.0258-2724.2011.02.005 [20] 杨若冲, 谈至明, 黄晓明, 等. 掺聚合物的橡胶混凝土路用性能研究[J]. 中国公路学报, 2010, 23(4): 15-19. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGGL201004004.htmYANG Ruo-chong, TAN Zhi-ming, HUANG Xiao-ming, et al. Research on performance of rubberized concrete incorporated with polymer[J]. China Journal of Highway and Transport, 2010, 23(4): 15-19. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZGGL201004004.htm [21] FOWLER D W. Polyenes in concrete: a version for the 21st century[J]. Cement and Concert Composites, 1999, 21(5/6): 449-452. [22] DOWNING T D, KUMAR R, CROSS W M, et al. Determining the interphase thickness and properties in polymer matrix composites using phase imaging atomic force microscopy and nanoindentation[J]. Journal of Adhesion Science and Technology, 2000, 14(14): 1801-1812. [23] JANOTKA I, KRAJCI L, RAY A, et al. The hydration phase and pore structure formation in the blends of sulfoaluminate-belite cement with Portland cement[J]. Cement and Concrete Research, 2003, 33(4): 489-497. [24] AL-NEGHEIMISH A I, ALHOZAIMY A M. Impact of extremely hot weather and mixing method on changes in properties of ready mixed concrete during delivery[J]. ACI Materials Journal, 2008, 105(5): 438-444. [25] 高屹, 韦灼彬. 聚氨酯混合材料发泡技术现场试验研究[J]. 工程力学, 2009, 26(增1): 198-202. https://www.cnki.com.cn/Article/CJFDTOTAL-GCLX2009S1047.htmGAO Yi, WEI Zhuo-bin. Experimental study on frothing techniques with mixed polyurethane materials[J]. Engineering Mechanics, 2009, 26(S1): 198-202. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-GCLX2009S1047.htm -
下载:
点击查看大图
计量
- 文章访问数: 944
- HTML全文浏览量: 153
- PDF下载量: 659
- 被引次数: 0
