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ZZLS生态护坡材料的劣化及其相关特性试验研究
Research on Deterioration and Related Properties of ZZLS Ecological Revetment Material
【作者】 李峰;
【导师】 朱瑞赓;
【作者基本信息】 武汉理工大学 , 结构工程, 2006, 博士
【摘要】 本论文所研究的ZZLS绿色生态护坡材料是一种强度高、抗侵蚀能力强,且草、花、灌木等植被均可生长的“人造土壤”,能将护坡与绿化两道工序合二为一,加快建设速度和降低护坡绿化的综合造价,因此ZZLS绿色生态护坡材料是一种新型的生态环境材料。 目前所有的研究都集中生态护坡材料单一的性能方面,比如成型机理、植生机理、护坡机理以及生态机理等,并没有把这些机理有机地统一起来进行系统分析;在国内对于生态材料研究还处于刚刚起步阶段,尚无人通过强度、声波波速、回弹值之间的关系来研究生态材料的宏观和微观特性;并且材料是一种新型的生态材料,大多数研究方向还停留在材料的前期研究(植生机理、护坡机理、生态机理等),还没有人研究生态材料的劣化、耐久性以及寿命这些材料的长期性能研究。本文试图通过室内试样和原状试样的室内伺服机压力试验和非破损检测技术,以及室内加速试验和灰色模型预测方法等对ZZLS材料的特性做较为深入的研究,更好的应用于生产实践。 本论文研究的内容主要有: (1)详细系统地阐述了ZZLS绿色生态护坡材料的组成、施工流程、材料成型机理、植生机理、强度增长机理、护坡机理、生态环境效应、植被选择原则及类型、材料的智能喷灌技术等性能的研究,并通过野外种植试验和生态停车场的成功应用,进一步说明ZZLS材料是一种新型的、多功能的绿色生态护坡材料。 (2)介绍了常见材料的破坏因素,进而分析研究ZZLS材料的破坏因素,并引进循环劣化疲劳累积理论来分析ZZLS材料破坏的特点,进行了ZZLS材料的强度试验、声波试验、回弹试验以及干湿循环试验设计。 (3)通过室内制备ZZLS不同系列材料的试件和现场取得的原状试样,在室内进行了抗压强度试验,详细地分析材料的应力—应变过程及曲线特点,同时研究抗压强度与水泥质量掺量之间的关系;在室内试验中,用非破损的声波和回弹测试技术,对ZZLS材料强度进一步做出研究,并系统研究了声波波速、回弹值与抗压强度的关系,并对其规律进行了分析和讨论。 (4)在室内进行加速劣化试验,由于ZZLS材料是一种复合材料,在自然环境中劣化的因素有很多不确定因素,抓住影响材料劣化的主要环境因素温度、湿度的变化引起的干湿交替。随着循环次数的变化,对ZZLS材料的宏观现象的变化的特点进行详细描述,并总结出试件质量损失、强度损失、劣化损伤变量与循环次数之间的规律特征。
【Abstract】 ZZLS is a kind of green ecological material with high strength and great erosion resistance. It can also be named "the artificial soil" which such vegetable as grass, flower and bush can grow well in. Consequently, we not only gain the object of slope protection, but also have a good green environmental effect, so the construction speed is faster and the price is lower. Then, ZZLS is a new eco-material.At the present time, the whole research are focus on single performances, such as molding theory, plant growth theory, slope protection theory, and ecological theory, etc, which aren’t united to make system analyses. On the eco-materials, domestic study is in initial step, nobody can study macro-character and micro-character through strength, wave velocity and resilience coefficient. Due to a new eco-material, most of the researches are concentrated on formal performance study, the long-period performance on ecological materials, which are deterioration, durability and lifespan, aren’t analyzed. Through pressure test, non-destructive inspection and accelerated test of indoor sample and undisturbed sample, ZZLS is made profound analysis incorporated with gray model prediction method, so that we can grasp the property to apply to engineering construction.The paper is formulated on material composition, construction procedure, molding theory, plant growth theory, strength growth theory, slope protection theory, ecological effect, plant selection principle and style, intelligence spray irrigation, etc. Through successful application of field planting test and ecological parking lot, ZZLS is a new multi- function green ecological slope protection material.According to the damage factors of common materials, ZZLS damage factors are introduced and analyzed. Then, the damage features are analyzed through loop fatigue accumulated theory, so the paper can design strength test, wave velocity test, resilience test and alternation test of wetting and drying.Through different level indoor sample and undisturbed sample, the paper can design compression strength test to analyze stress-strain curve and gain the relation between compression strength and cement blend ratio. In indoor test, the non-destructive inspection techniques, such as wave velocity test and resilience test, are studied to acquire the relation among wave velocity, resilience parameter and compression strength and analyze the regularity.In indoor accelerated deterioration test, due to the composite material, there are many uncertain influence factors in natural environment deterioration, but the principle factor is alternation of wetting and drying generated from temperature and humidity. With loop number
【Key words】 ZZLS green ecological revetment material fatigue accumulated theory; tress-strain curve; non-destructive inspection; alternation of wetting and drying; mass loss; strength loss; degradation damage parameter; gray prediction; deterioration; durability;