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第十二章 无机结合料稳定路面 Inorganic binder-stabilized pavement

第十二章 无机结合料稳定路面 Inorganic binder-stabilized pavement. 第十二章 无机结合料稳定路面 Inorganic binder-stabilized pavement. § 12-1 :概述 Introduction 定义 优、缺点 优点:稳定性好,抗冻性强,结构成板体。 缺点:耐磨性差 使用范围:各种路面结构的基层 base course 和底基层 subbase. § 12-2 :无机结合料稳定材料的物理力学特性

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第十二章 无机结合料稳定路面 Inorganic binder-stabilized pavement

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  1. 第十二章 无机结合料稳定路面 Inorganic binder-stabilized pavement

  2. 第十二章无机结合料稳定路面Inorganic binder-stabilized pavement §12-1:概述 Introduction 定义优、缺点 优点:稳定性好,抗冻性强,结构成板体。 缺点:耐磨性差 使用范围:各种路面结构的基层base course和底基层subbase

  3. §12-2:无机结合料稳定材料的物理力学特性 mechanical properties of inorganic binder-stabilized pavement 应力—应变特性、疲劳特性、收缩(温缩和干缩)特性 一、无机结合料稳定材料的应力——应变特性 stress-strain property of inorganic binder-stabilizing material 特性:R=f(t) 试验方法:抗压试验和劈裂试验 试验内容:R ER σsp Esp 强度的变化,随龄期的增加而增长。 影响因素:材料的性质,材料的用量,温度,密实度等

  4. 二、无机结合料稳定材料的疲劳特性 fatigue property of inorganic binder-stabilizing material 抗拉强度 tensile strength 疲劳寿命fatigue life:σf/σs<50% 疲劳方程式fatigue equation 疲劳方程:lgNf=a+blgσf/σs lgNf=a+bσf/σs 影响因素contributory factors:材料的强度和刚度 强度越大刚度越小,其疲劳寿命也越长

  5. 三、无机结合料稳定材料的干缩特性 dry shrinkage properties of inorganic binder-stabilizing material 表征指标token index: 干缩应变dry shrinkage straining,干缩系数dry shrinkage coefficient, 失水量filter loss 影响因素contributory factors: 材料的性质、剂量、含水量 、齡期

  6. 对于粒料类granular material: 石灰稳定类lime-stabilizing type>水泥稳定类cement-stabilizing type>石灰粉煤灰稳定类lime dust & fly ash-stabilizing type 对于稳定细粒土stabilizing fine-grained soil: 石灰土soillime>水泥土cement soil/水泥石灰土cement lime soil>石灰粉煤灰土lime dust & fly ash soil 四. 无机结合料稳定材料的温缩特性 warm shrinkage of inorganic binder-stabilizing material 温缩特性指标:温缩系数 影响因素contributory factors: 材料的性质、含水量、齡期、剂量等

  7. §12-3:石灰稳定类基层(底基层) base course (subbase) of lime-stabilizing type 定义definition 石灰剂量dosage of lime:石灰剂量=石灰质量/干土质量 一.石灰土强度形成原理rationale of soil lime strength 1.离子交换作用ion exchange 2.碳酸化作用carbonation 3.结晶作用crystalization 4.火山灰作用 二.影响强度的因素contributory factors

  8. 三、石灰土基层的应用 application of lime-soil base 四、石灰土基层缩裂防治 prevention and cure of shrinkage and splitting 1.      控制压实含水量control compaction water content; 2.      控制压实标准control compaction standard; 3.      控制施工气温control construction temperature; 4.      重视养护attach importance to maintenance; 5.      在材料中加入集料put aggregate into the material; 6.      设置粘结层set up adhesive layer; 7.      铺筑碎石隔离过渡层 build segregating and transitional layer with macadam

  9. 五、石灰土混合料设计 design of soil lime mixture 设计内容:design volume 1、选择材料(土、石灰)selection materials 2、确定最佳石灰剂量 determining dosage of lime 3、确定最佳含水量determining water content 六、石灰土基层的施工construction of lime-soil base

  10. §10-4:水泥稳定类基层 cement-stabilizing base course 定义 definition 特点:feature 良好的整体性,足够的强度,抗水性和耐冻性。强度随齡期的增长而增长。 一、强度形成原理rationale of soil lime strength 1、水泥的水化作用hydrating effect of cement 2、离子交换作用 ion exchange 3、化学激发作用chemical incitement 4、碳酸化作用carbonation

  11. 二、影响强度的因素 contributory factors 三、水泥稳定类材料的组成设计 composition design of cement-stabilizing materials 1.材料要求 material requirment 2.混合料设计 design mixture 设计内容:design volume 1.选取原材料 selection raw materials 2.确定最佳石灰剂量 determining dosage of lime 3.确定最佳含水量determining water content 四、水泥稳定类材料的施工 construction of cement-stabilizing materials

  12. §10-5:工业废渣稳定基层 industrial solid waste-stabilizing base course 定义 definition 优、缺点 feature 缓凝性,强度高,稳定性好,成板体。强度随齡期的增长而增长。 使用范围 scope 各种路面结构的基层或底基层 工业废渣的类型 industrial solid waste-stabilizing type 粉煤灰fly ash,煤渣cinder,钢渣steel slag 成分含量:含有较多的SiO2,CaO,Al2O3等活性物质 active compound。 一、材料的要求 requirements for materials

  13. 二、混合料设计design of mixture 1.选取合适的材料;selection compatible materials 2.确定石灰与粉煤灰或石灰与煤渣的比例 determine proportion of lime and fly ash or lime and cinder; 3.确定石灰粉煤灰或石灰煤渣与土的比例; determine proportion of lime and fly ash or lime and cinder with soil 4.确定混合料的最佳含水量。 determining water content in mixture 三、类型types 1.石灰煤渣类基层 lime and fly ashbase course 2.石灰粉煤灰基层lime and cinderbase course

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