Adopt stabilized material mixer with full - electronic automatic measuring system to centralizedly mix the cement stabilized subbase materials , and adopt our company ' s own paver to pave on the construction site , use the road roller to roll into the shape 水泥稳定基层材料采用有全电子自动计量系统的稳定料拌和机进行集中拌制，施工现场采用我公司自有的摊铺机摊铺，压路机碾压成型。
This paper presents checking method of using predigested formula to calculate construction deflection checking value of base according to the strength of the semi - rigid base materials increases with their age ; and advances pavement base construction deflection value checking criterion , provides checking basis for controlling pavement construction 本文在考虑半刚性基层材料强度随龄期增长规律的基础上，提出采用简化公式计算路面基层顶面施工弯沉值的检验方法；并结合宁夏公路路面典型结构，提出路面基层施工弯沉值检验标准，为控制路面施工质量提供了检测依据。
Because the best grade limits does not vary with material property , firstly , we can confine material grade to the best grade limits when doing subbase mixture design , secondly , after systematic temperature contraction test , aridity contraction test and compressive strength correction test , we can determine the best cement percentage which has the best crack resistance property 因为最佳级配范围是与粒料的粒径大小有关的，所以在基层材料配合比设计时可首先将材料级配限制在最佳级配范围以内，然后通过系统的温缩、干缩性能试验以及抗压强度校核试验，最终确定抗裂性较好的合理水泥剂量。
Based on above research results , mechanism of the mixture features is studied by some methods , such as chemical analysis , electron microscope and x - raying and so on to explain the characteristic principle . research conclusion confirms it is the high content of useful fly - ash composition and the high structure polymeric degree that lime fly - ash mixture not only can present possibility of delayed base compaction and strength regeneration compared with other base materials but also can take continuous construction process to compact base course and pavement 认为正是粉煤灰具有的高比例有效成分含量，以及结构上呈现的高度聚合的稳定性，使粉煤灰石灰混合料与其它常见的半刚性基层材料相比，不但能表现出显著的碾压成型的可延迟性、结构强度的可恢复性，而且还具有在一定条件下能够采用基层和沥青面层连续施工的独特性质。
Through the experimental research , we think : the technological capacity of fiberglass asphalt macadam if weaker than asphalt macadam , however , if use elasticized capacity to solve blending technological problem . adjust the breed of fiber silk , extend its diameter , its paving capacity is still worth exploring , asphalt - rubber macadam structure lager have good deformed - become capacity and crazed - resistance capacity , small gap rate . good water - resistance capacity , good hot - stability and simple construction technology . therefore . pitch rubber spall is a good cover material which is suitable for the second class or lower whose asphalt pavement has split open because of fatigue . and is the good structural measure of preventing half - rigidity grass - roots unit shrink - rift reflecting . pave a thin layer of pitch rubber spall between asphalt - type pavement layer and half - rigidity basic level , although the cost of building is higher than paving togongbu in the middle , the construction technology , crazing - resistance and water - resistance are better than togongbu , not only could reduce greatly the reflex of half - rigidity grass - roots unit material , long then the use lifespan of pavement , but also it is possible to reduce suitably the thickness of asphalt mixture layer , though the cast of building in the early days becomes more , in the long - term opinion , it have fully important technological and economical significance 通过试验研究认为：玻璃纤维沥青碎石的技术性能不如沥青碎石好，但路用弹性性能较好，如能解决拌和工艺问题，调整纤维丝的品种，增大其直径，其路用性能仍值得探讨，沥青橡胶碎石结构层具有变形性能和抗裂性能良好，空隙率小，防水性能好，热稳定性较好，施工工艺简单的特点，因此，沥青橡胶碎石是二级及二级以下公路因疲劳而开裂的沥青路面的良好罩面材料，也是防止半刚性基层收缩裂缝反射的良好结构措施，在沥青类路面面层和半刚性基层之间夹铺沥青橡胶碎石薄层，虽然造价比夹铺土工布高，但其施工工艺，抗裂性能和防水性能均优于土工布，不仅可以大大减少半刚性基层材料的反射裂缝，延长路面使用寿命，而且可能适当减薄沥青混合料面层的厚度，虽然初期造价有所增加，从长远来看，具有十分重要的技术和经济意义。
Based on the studies , it is proved that lime fly - ash mixture is provided with more time to compact during construction compared with other base materials in forming even higher structure strength but not in reducing strength within 1 ~ 3 days period of time . meanwhile , structure strength of the mixture which has been destroyed by some reasons can be recovered in a great extent if original structure is regained . on the other hand , during the high temperature summer season or under other conditions promoting the mixture to form strength , continuous construction process between lime fly - ash base course and bituminous pavement can be carried out to complete the building process in short time 确认二灰基层材料与其它类型的基层材料相比，在施工时具有较长的施工碾压成型时间，在一定时间里延迟成型的二灰基层强度不仅不降低，反而还有一定程度的提高；与此同时早期受到破坏的二灰材料在恢复整体性的条件下，结构强度能够在很大程度上得到再恢复；另一方面，在夏季高温季节以及在强化基层强度形成的前提下，二灰类基层和沥青面层可以采用连续施工的方式在较短的时间里完成路面铺筑工作。
Some construction specific characteristics for semerigid base course material of lime fly - ash mixture are studied systematically in this paper , which consists of possibility of delayed base compaction , strength regeneration and continuous construction between base course and pavement etc . through laboratory tests , rules of delayed base compaction , features of strength regeneration and primary conditions of continue construction are explored respectively 本文针对石灰粉煤灰类基层材料，全面系统地分析研究了该材料的施工特性，即施工碾压成型的可延迟性、早期强度的可恢复性以及基层和沥青面层施工的可行性等。通过系统的室内试验，了解和掌握了二灰类材料成型可延迟的规律、早期强度可恢复的特点和连续施工的基本条件。
By means of laboratory and field experimentation of typical semi - rigid base materials , the relationships among laboratory experimental values , field maintain values , field core values and construction criteria are put forward . and the relationships between different test methods are established . using time - temperature conversion principle , it processes the intensity assessment of field cores , then offers the method of determining the test deflection of pavement surface 通过典型半刚性基层材料的室内外试验，研究主要设计参数的室内试验值、野外养生值、现场取芯值及施工指标间的关系，建立了不同试验方法间的相关关系，运用时温换算法则，对现场芯样进行强度评定，并提出了路表弯沉检测标准的确定方法。
The old asphalt mixture being dealt with cement is a cold in - place recycling method . the mechanism is that the crushed asphalt mixture and lime soil are reused and is stabilized by cement additive . so the material can be applied in base and subbase course such as cement stabilized aggregate 利用水泥处治废旧沥青路面材料属于沥青路面冷再生的范畴，其再生机理是将加工破碎的废料(包括废旧的沥青混合料和部分灰土基层)重新利用，经过水泥进一步的稳定作用，形成与水泥稳定级配粒料类似的基层和底基层材料。
In the light of its special property being not easy to gain strength , through mechanics researches on different methods to stabilize this kind of low _ liquid _ limit silty soil as subbase material , evaluated both technically and economically , we have got a cement lime stabilization plan to meet the index requirements for non _ side _ limit strength of compression of subbase of class2 road stipulated in the specification ; by means of improving the workmanship , thickening the loose layer of soil , adding soil on covering weave fabric before compaction , such problems can be solved as very poor compaction , loose surface during compaction , roughness and unevenness , coats of layer and shear damages 本文针对黄河冲积而成的低液限粉土其粘粒含量极低、土的不均匀系数很小、胶体活性差的工程特性,通过采用不同方法稳定该类土作底基层材料的力学性能研究,从技术、经济角度综合评价,得到满足规范抗压强度指标要求的水泥石灰稳定方案。通过对原材料、试验配合比设计、施工、等方面进行优化,从而显著减轻了基层的早期及长期缩裂程度,从而提高了路面的耐久性。
