无机结合料稳定路面

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,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,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 sp 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,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：,f,/,s,50%,疲劳方程式,fatigue equation,疲劳方程：lgN,f,=a+blg,f,/,s,lgN,f,=a+b,f,/,s,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,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,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,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,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. 在材料中参加集料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,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、确定最正确石灰剂量 determining dosage of lime,3、确定最正确含水量determining water content,六、石灰土基层的施工 construction of lime-soil base,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,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.确定最正确石灰剂量 determining dosage of lime,3.确定最正确含水量determining water content,四、水泥稳定类材料的施工,construction of cement-stabilizing materials,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,SiO,2,CaO,Al,2,O,3,等活性物质,active compound,。,一、材料的要求,requirements for materials,二、混合料设计design of mixture,1选取适宜的材料；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确定混合料的最正确含水量。 determining water content in mixture,三、类型 types,1.石灰煤渣类基层 lime and fly ash base course,2.石灰粉煤灰基层lime and cinder base course,