沥青水泥砂浆振动搅拌的试验研究
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摘要
水泥乳化沥青砂浆是一种由水泥、乳化沥青、砂、水、添加剂等多种原材料组成,经水泥水化与沥青破乳胶结共同作用而形成的一种复合材料,是高速铁路板式无碴轨道的关键结构性材料。
论文讨论了影响水泥乳化沥青砂浆性能的主要指标,给出了砂浆温度、扩展度、流动度、分离度、含气量、单位容积质量、膨胀率、弹性模量、抗折强度、抗压强度、抗疲劳性等指标的现场测试方法。
初步分析了水泥乳化沥青砂浆形成机理,包括水泥水化机理、乳化沥青破乳机理、CA砂浆拌和过程涉及到的沥青破乳与水泥水化的物理化学过程、消泡剂的作用机理等,为试验研究提供了理论基础。
试验结果表明：在振动搅拌机各组搅拌参数组合时,水泥乳化沥青砂浆的各项指标基本满足要求；推荐的搅拌装置参数为：振动频率为200rad/s～250 rad/s,振幅为1.5mm,乳化沥青与水的混合速度为20r/min,乳化沥青与水的混合时间为1.5min,高速搅拌速度40r/min～60 r/min,高速搅拌时间2.0min～3.0min,消泡速度40 r/min～30r/min,消泡时间2.0min；推荐的合理投料顺序是：乳化沥青+水+减水剂→干粉→消泡剂→成品。
水泥乳化沥青砂浆的微观结构分析主要从气孔分布、浆体结构以及骨料分布三个方面来进行,分析结果表明：搅拌工艺和参数变化确实要对CA砂浆微观结构产生重要影响；当搅拌工艺和参数选取适当时,CA砂浆的微观结构改善,其性能得到了保证。
论文通过研究振动搅拌装置与水泥乳化沥青砂浆材料的相互作用机理,主要通过试验确定振动搅拌装置参数和工艺参数变化时砂浆材料形成过程中的各项指标变化规律,所得到的研究结论为工业生产中提高水泥乳化沥青砂浆性能和生产效率提供了依据。
Emulsified asphalt cement mortar is made of cement, emulsified asphalt, sand, water, additives and other raw materials, after the hydration cement and asphalt emulsion breaking interaction and then forming a composite material. It is the key structural materials of the high-speed railway ballastless track.
This paper discusses the major indicators which has effect on emulsified asphalt cement mortar performance, and shows the testing methods of the site about mortar temperature, extension, fluidity, separation, gas content, unit volume quality, expansion rate, elastic modulus, flexural strength, compressive strength, fatigue resistance and other indicators.
It analyzes the formation mechanism of cement mortar emulsified asphalt, including the cement hydration mechanism, the mechanism of emulsified asphalt emulsion breaking, CA mortar mixing process involving the physical and chemical processes of asphalt emulsion breaking and cement hydration, the mechanism of defoamer, etc, and provides a theoretical basis for experimental research.
The results show that the vibration mixer mixing parameters of each group when the indicators of the emulsified asphalt cement mortar essential meet the requirements; Recommended mixing device parameters are:vibration frequency for 200rad/s～250 rad/s, amplitude to 1.5mm, emulsified asphalt and water mixing speed for 20r/min, emulsified asphalt and water mixing time for 1.5min, high-speed stirring speed for 40r/min～60 r/min, high-speed stirring time for 2.0min～3.0min, defoaming speed for 40 r/min～30r/min, defoaming time for 2.0min; recommended reasonable feed sequence is:emulsified asphalt+ water+water reducing agent→powder→defoaming agent→product.
The analysis of the microstructure about emulsified asphalt cement mortar are mainly carried out via three aspects which are the distribution of stomata, the distribution of stomata, slurry structure, and the aggregate distribution. The results show that when mixing technology and parameters changing, it will really have an important impact on CA mortar. When the mixing technology and parameters are selected appropriate, the microstructure of CA mortar could be improved, finally the CA mortar performance could be ensured.
In this thesis, it studies the interaction mechanism of vibration mixing device and emulsified asphalt cement mortar material, mainly through testing to determine the changing regularity of various indicators of the formation of mortar material when the mixing device vibration parameters and process parameters changing. The conclusions from the research provide foundations to improve emulsified asphalt cement mortar performance and its productivity for the industrial production.
论文讨论了影响水泥乳化沥青砂浆性能的主要指标,给出了砂浆温度、扩展度、流动度、分离度、含气量、单位容积质量、膨胀率、弹性模量、抗折强度、抗压强度、抗疲劳性等指标的现场测试方法。
初步分析了水泥乳化沥青砂浆形成机理,包括水泥水化机理、乳化沥青破乳机理、CA砂浆拌和过程涉及到的沥青破乳与水泥水化的物理化学过程、消泡剂的作用机理等,为试验研究提供了理论基础。
试验结果表明：在振动搅拌机各组搅拌参数组合时,水泥乳化沥青砂浆的各项指标基本满足要求；推荐的搅拌装置参数为：振动频率为200rad/s～250 rad/s,振幅为1.5mm,乳化沥青与水的混合速度为20r/min,乳化沥青与水的混合时间为1.5min,高速搅拌速度40r/min～60 r/min,高速搅拌时间2.0min～3.0min,消泡速度40 r/min～30r/min,消泡时间2.0min；推荐的合理投料顺序是：乳化沥青+水+减水剂→干粉→消泡剂→成品。
水泥乳化沥青砂浆的微观结构分析主要从气孔分布、浆体结构以及骨料分布三个方面来进行,分析结果表明：搅拌工艺和参数变化确实要对CA砂浆微观结构产生重要影响；当搅拌工艺和参数选取适当时,CA砂浆的微观结构改善,其性能得到了保证。
论文通过研究振动搅拌装置与水泥乳化沥青砂浆材料的相互作用机理,主要通过试验确定振动搅拌装置参数和工艺参数变化时砂浆材料形成过程中的各项指标变化规律,所得到的研究结论为工业生产中提高水泥乳化沥青砂浆性能和生产效率提供了依据。
Emulsified asphalt cement mortar is made of cement, emulsified asphalt, sand, water, additives and other raw materials, after the hydration cement and asphalt emulsion breaking interaction and then forming a composite material. It is the key structural materials of the high-speed railway ballastless track.
This paper discusses the major indicators which has effect on emulsified asphalt cement mortar performance, and shows the testing methods of the site about mortar temperature, extension, fluidity, separation, gas content, unit volume quality, expansion rate, elastic modulus, flexural strength, compressive strength, fatigue resistance and other indicators.
It analyzes the formation mechanism of cement mortar emulsified asphalt, including the cement hydration mechanism, the mechanism of emulsified asphalt emulsion breaking, CA mortar mixing process involving the physical and chemical processes of asphalt emulsion breaking and cement hydration, the mechanism of defoamer, etc, and provides a theoretical basis for experimental research.
The results show that the vibration mixer mixing parameters of each group when the indicators of the emulsified asphalt cement mortar essential meet the requirements; Recommended mixing device parameters are:vibration frequency for 200rad/s～250 rad/s, amplitude to 1.5mm, emulsified asphalt and water mixing speed for 20r/min, emulsified asphalt and water mixing time for 1.5min, high-speed stirring speed for 40r/min～60 r/min, high-speed stirring time for 2.0min～3.0min, defoaming speed for 40 r/min～30r/min, defoaming time for 2.0min; recommended reasonable feed sequence is:emulsified asphalt+ water+water reducing agent→powder→defoaming agent→product.
The analysis of the microstructure about emulsified asphalt cement mortar are mainly carried out via three aspects which are the distribution of stomata, the distribution of stomata, slurry structure, and the aggregate distribution. The results show that when mixing technology and parameters changing, it will really have an important impact on CA mortar. When the mixing technology and parameters are selected appropriate, the microstructure of CA mortar could be improved, finally the CA mortar performance could be ensured.
In this thesis, it studies the interaction mechanism of vibration mixing device and emulsified asphalt cement mortar material, mainly through testing to determine the changing regularity of various indicators of the formation of mortar material when the mixing device vibration parameters and process parameters changing. The conclusions from the research provide foundations to improve emulsified asphalt cement mortar performance and its productivity for the industrial production.
引文
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[33]王振军,李顺勇.水泥乳化沥青砂浆(CAM)的微观结构特征[J].武汉理工大学学报,2009(3).
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[3]何华武.无碴轨道技术[M].中国铁道出版社,2005
[4]何华武.创新的中国高速铁路技术(上)[J].铁道建筑技术,2007,5：1-15
[5]何华武.创新的中国高速铁路技术(下)[J].铁道建筑技术,2007,6：1-14
[6]ICE Neubaustrecke Koin-Rhein Planen Bauen Betreiben,德国Hestra出版社,2007
[7]江成,林之珉,范佳,等.高速铁路高架桥上无碴轨道关键技术的试验研究[R].北京：铁道科学研究院,1998
[8]江成,翟婉明,陈松林,等.秦沈客运专线桥上无碴轨道综合试验研究[R].北京：铁道科学研究院,2003.
[9]林之珉,赵曦,王继军,等.高速铁路无碴轨道结构设计参数的研究[R].北京：铁道科学研究院,1996.
[10]李娜.滑模摊铺机铺设铁路无碴轨道施工技术介绍[J].建筑机械技术与管理,2008,01：115-118.
[11]彭仁军.武广客运专线无昨轨道工程施工设备的投资与管理[J].铁道工程技术,2007,12
[12]铁道第三勘测设计院,铁道科学研究院,西南交通大学,等.秦沈客运专线桥上无碴轨道设计技术条件[z].北京：铁道科学研究院,2001.
[13]中华人民共和国交通部.JTJ034—-2000.公路路面基层施工技术规范[S].北京：人民交通出版社,2000
[14]中华人民共和国铁道部.铁建设[2005]160号铁路混凝土工程施工质量验收补充标准[S].北京：中国铁道出版社,2005
[15]中华人民共和国铁道部科学技术司.科技基[2008]74号客运专线铁路无碴轨道支承层暂行技术条件[S].北京：中国铁道出版社,2008
[16]中铁十二局集团有限公司.武广客运专线XXTJVI标段Rheda2000无碴轨道施工作业指导书[R].中铁十二局集团有限公司,2006
[17]中铁工程总公司三局,铁道科学研究院,铁道第三勘测设计院,等.秦沈客运专线桥上 无碴轨道施工技术条件[Z].北京：铁道科学研究院,2001
[18]中华人民共和国铁道部.新建时速300—350km客运专线铁路设计暂行规定[S].北京：中国铁道出版社,2007
[19]Kazuyosi O,Yosio I.Compressive strength of the CA mortar and its temperature susceptibility{J}.Memoirs of the Faculty of Technology,1976,10(2):1-13.
[20]Prithvi S K, Cynthia Y L, Frazier P J. Characterization Tests for Mineral Fillers Related to Performance of Asphalt Paving Mixtures [J].NAPA Report,1998,(2).
[21]Li G. Experimental study of cement-asphalt emulstion composite[J]. Cement and Concrete Research,1998,28(5):635-641.
[22]Kasselouri-Rigopoulou V, Kolias S, Louverdi M, et al. Study of the Hydration Products of Mixtures of Cement and Asphalt Emulsion Used in Recycling Works of Flexible Pavements[C]Role of Concrete in Sustainable Development-proceedings of the International Symposium-celebrating Concrete:People and Practice, Dedicated to Professor Surendra Shah. Dundee:United Kingdom,2003.513-520.
[23]WEI X, L I Z. Non-contacting resistivity measurement for hydration of cement-based materials [A]. In:DH IR R K,NEWLANDS M D, MCCARTHY M J, et al, eds. Role of Cement Science in Sustainable Development [C].London:Thomas Telford L td,2003.
[24]Pouliot Nadia, Marchand Jacques, Pigeon Michel. Hydration Mechanisms, Microstructure, and Mechanical Properties of Mortars Prepared with Mixed Binder Cement Slurry-asphalt Emulsion [J].Journal of Materials in Civil Engineering,2003,15(1):54-59.
[25]Oruc Seref, Celik Fazil, Akpinar M Vefa. Effect of Cement on Emulsified Asphalt Mixtures [J].Journal of Materials Engineering and Performance,2007,16(5):578-583.
[26]金守华,陈秀方,杨军.板式无碴轨道用CA砂浆的关键技术[J].中国铁道科学,2006(2).
[27]胡曙光,王涛,王发洲,等.CA砂浆抗冻性能的影响因素研究[J].武汉理工大学学报,2008(8).
[28]王发洲,王涛,胡曙光,等.CA砂浆的流变特性[J].武汉理工大学学报(工学版),2008(4).
[29]王涛,胡曙光,王发洲,等。沥青乳液加料顺序影响CA砂浆早期强度的机理研究[J].铁道建筑技术,2008(1).
[30]王涛,胡曙光,王发洲,等。CA砂浆强度主要影响因素的研究[J].铁道建筑,2008(2).
[31]朱建平,刘文勇,许秋菊,等.水泥乳化沥青砂浆材料动态模量试验分析.第十届中国科 协年会论文集[C],2008(4).
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