Technologies for Asphalt Pavement Surface Testing in Road and Bridge Construction

Asphalt pavement is currently one of the main components in the construction of roads and bridges.However,from a practical point of view,various quality problems are prone to occur in the surface layer of asphalt pavement,which will lead to the poor overall quality of road and bridge projects.Therefore,it should be applied reasonably.Advanced testing technologies are used to test the mixture quality,compaction,segregation,thickness,and other aspects of the asphalt pavement surface layer,so as to improve the quality of the asphalt pavement surface layer,and then improve the overall quality of road and bridge construction.Therefore,this paper mainly analyzes the technologies for asphalt pavement surface layer testing in road and bridge engineering construction.

Construction Technology of Warm Mix Asphalt Pavement in Cold High-Altitude Areas

With the continuous development of domestic highway construction,highway civil engineering and service level quality have attracted much attention.Good pavement quality and high-quality service make people feel comfortable and smooth when traveling.High-quality pavement can significantly reduce the probability of traffic accidents.At present,there is a direct relationship between pavement quality and pavement construction operations.Carrying out pavement construction operations in cold high-altitude areas requires a reasonable selection of construction equipment and methods.The application of warm-mix asphalt pavement construction technology can ensure pavement quality.Therefore,this paper analyzes the advantages of warm-mix technology,the environmental characteristics of cold high-altitude areas,and construction preparations,and discusses the construction technology of warm-mix asphalt pavement in cold high-altitude areas in detail,to improve the overall road quality of cold high-altitude areas.

Analysis on the Management and Technical Aspects of Asphalt Pavement Construction

The continuous acceleration of urban construction and the quality of highway construction projects has received an extensive attention,predominantly on asphalt pavement construction.Therefore,it is necessary to establish a high-quality supervision,good management and technical operation as well as maintenance control mechanism in conjunction with the construction environment to ensure a success on road construction to be carried out smoothly and be able to achieve an advance level in the optimization goal of asphalt pavement construction management.This paper focuses on the technical points and management points of asphalt pavement construction,aiming to provide more intuitive data for the construction management department to improve the overall quality of asphalt pavement construction.

GMA material design and construction quality control for asphalt pavement of steel box girder: Case study of the Hong Kong–Zhuhai–Macao Bridge

To improve the quality of the Hong Kong–Zhuhai–Macao Bridge paving project,a new paving layer material,Guss-mastic asphalt(GMA),was proposed in this paper by combining the advantages of two types of cast asphalt mixtures:mastic asphalt(MA)and Guss asphalt(GA).Based on the characteristics of GMA,to simulate its actual production process,this study developed a small-simulated cooker mixing equipment.Moreover,the flow degree,60C dynamic stability,and impact toughness were proposed to be used to evaluate the construction and ease,high temperature stability,and fatigue resistance of GMA cast asphalt mixtures,respectively.Moreover,the quality control standards for GMA paving materials by indoor tests,field trial mix GMA material performance tests,and accelerated loading tests were finalized.The study showed that the developed simulated cooker yielded consistent mixing results in the same working environment as the engineering cooker device.Increasing the coarse aggregate incorporation rate,coarsening the mastic epure(ME)gradation composition,and using a smaller oil to stone ratio can reduce the flowability of the GMA materials to varying degrees.The four-point bending fatigue life and impact toughness of the different GMA materials are correlated well.A mobility of<20 s,60C dynamic stability of 400–800 times/mm,15C impact toughness of400 N⋅mm,and cooker car mixing temperature control standard of 210C–230C form an appropriate control index system for the design and production of GMA cast asphalt mixtures.Simultaneously,accelerated loading tests verified the accuracy and reliability of the quality control index system that has been used in the GMA paving project of the Hong Kong–Zhuhai–Macao Bridge deck and has achieved good application results.

Analysis on On-Site Asphalt Pavement Quality Inspection Technology in Highway Engineering

The acceleration of urbanization has promoted the increase in the number of urban highway projects,resulting in an increase of emphasis on the quality of urban highway projects.The quality and safety of highway construction directly affects the driving comfort,safety,and service life after it is put into operation.Among them,asphalt pavement is an important structure in highway construction,and it is also a key link that directly affects the construction quality.In order to ensure the quality of construction,it is necessary to strengthen on-site testing during the construction process to discover problems in time,and to ensure that the construction is up to standard.This paper mainly presents an analysis on the necessity and application of on-site quality inspection technology for asphalt pavement construction of highway engineering,and outlines measures to improve highway engineering construction testing technology.

Application of Nanomaterials in Subgrade and Pavement

With the continuous progress of social science and technology,there are increasingly more kinds of high-tech materials that can be used in the construction of subgrade and pavement.Among them,the application of nanomaterials plays a commendatory role,improving the quality of pavement.Based on this,this paper analyzes the characteristics of nanomaterials and puts forward specific measures for the application of nanomaterials on the basis of further exploring the working principle of nanomaterials in subgrade and pavement,so as to promote the further development of subgrade and pavement construction.

高速公路SMA沥青混凝土路面施工技术分析

近年来随着交通流量的增加及车辆荷载的加重,传统沥青混凝土材料在耐久性方面逐渐显现出不足,容易出现车辙和裂缝等问题,SMA(Stone Mastic Asphalt)沥青混凝土应运而生。源自欧洲的SMA技术已在全球范围内得到广泛应用,核心在于通过改性沥青与优化骨料结构,显著提升了混合料的高温稳定性、抗滑性及抗老化能力。随着交通工程技术的不断发展及施工工艺的进步,SMA沥青混凝土在提升道路性能、延长使用寿命及降低维护成本方面展现出了显著的优势,这些特性使SMA沥青混凝土成为应对现代交通需求及环境挑战的关键解决方案。

中澳公路工程沥青路面材料与施工技术对比

针对中资企业技术人员在南太平洋地区开展公路工程建设中与国内技术规范混淆的问题,采用文献对比分析方法,对中国和澳大利亚的沥青路面施工技术要求中原材料组成、沥青混合料设计制备与施工、其他材料施工、质量管理等方面进行对比研究。结果表明:1)在原材料组成方面,中国规范列举了更多的原材料种类和型号;2)在沥青混合料设计、制备与施工上,中国规范在配合比设计、摊铺、压实成型等环节与澳大利亚技术指南存在差异;3)在路面结构层状组合上,中国规范与澳大利亚指南描述类似;4)中国规范在内容撰写上更为具体清晰,方便使用者查找技术参数要求,且在原材料和混合料施工上与澳大利亚技术指南有着明显差异;澳大利亚的指南更侧重于理念科普和设计原则介绍,对具体的技术参数与要求规定内容较少。

低温环境下粉煤灰漂珠改性沥青混合料施工期热量散失规律及有效碾压时间研究

漂珠作为一种高热阻材料,运用于多年冻土区沥青路面最初目的是减少运营期路面吸热,减缓冻土融沉。但其对施工期沥青路面温度散失规律及有效碾压时间的影响,则鲜有研究涉及。漂珠的加入改变了混合料自身的热物理性质,进而对沥青路面压实以及进入冻土路基的热量造成影响。本文首先通过室内试验,测试沥青胶浆热物理参数随漂珠掺量的变化规律。由于沥青混合料碾压过程中材料本身逐渐从松散状态转化为密实状态,该过程中材料孔隙率不断降低强度随之提高,因此施工期间沥青混合料热物理参数也处于动态变化之中。试验过程中,将添加漂珠后的沥青混合料视为一种复合材料,其主要由粗集料、沥青胶浆、空气三部分,通过室内试验测定漂珠沥青混合料中三种成分的热物理参数,并基于Williamson公式计算摊铺碾压过程中漂珠改性沥青混合料在密实和松铺两种状态下的热物理参数。之后建立摊铺碾压过程沥青路面温度场计算有限元模型,获取不同漂珠掺量和摊铺厚度下路面温度场变化规律,明确添加漂珠对施工期进入路基热流影响。最后基于数值计算结果,对施工期沥青路面温度影响因素进行多元回归分析,获得了施工期间沥青混合料温度预估方程。研究结果表明:添加15%沥青体积漂珠后混合料导热系数降低78%,比热容变化不大(小于1%)。外界气温为0℃、10℃、20℃、30℃工况下,添加15%漂珠可使密实状态下混合料有效碾压时间提升21.1%、20.2%、17.5%、16.8%;松散状态提升21.6%、21.2%、20.3%、18.7%。相同工况下,松铺状态有效碾压时间为密实状态下的1.7~2.1倍,因此,在低温工况下,初步碾压作业一旦开始,后续复压及终压应快速、连续开展,确保有效时间内使混合料达到规定压实度。此外,添加5%、10%、15%漂珠还可使密实状态下进入基层热量分别降低1.9%、3.1%、6.4%;松散状态下降低3.5%、7.3%、12.8%,说明添加漂珠对降低施工期热量对路基的扰动也有积极作用。

沥青路面公路工程现场施工技术研究

沥青路面施工质量控制成效直接影响着行车的舒适性及路面的耐久性,在实际施工过程中需合理选择施工材料,通过严格检测获取可靠数据,令材料质量符合施工要求,通过优化施工工艺,增强现场作业安全。以某工程为例,探讨了沥青路面施工材料控制标准,分析了施工技术要点,在保证工程质量的前提下实现绿色、环保、节能的施工目标,提高工程综合效益。

温拌沥青施工技术在高速公路路面施工中的应用

结合实际工程,从温拌沥青技术的基本原理、原材料设计、施工工艺等角度进行综合研究,通过施工质量检测评价温拌沥青路面技术的可行性。结果表明,采用温拌沥青技术可有效降低公路有害物排放量,同时保持路面使用性能,且可有效解决路面病害问题。

考虑服役性能差异的沥青路面环境影响评价

沥青路面从建设期到运营期结束的各个阶段都会消耗大量资源和能源,产生各类环境影响问题,而借助生命周期评价方法可以系统分析沥青路面所带来的各类环境负担。因此,以沥青路面生命周期评价方法体系为研究基础,提出基于实验室测试结果和仿真指标的沥青路面运维期环境影响表征,从而系统分析沥青路面生命周期中不同沥青路面材料性能差异所造成的环境影响。同时,对典型沥青路面和某一橡胶沥青路面在运维期和全生命周期的环境影响进行了对比分析。结果表明:仅考虑路面建设期时,典型沥青路面的环境影响小于橡胶沥青路面;而考虑建设期到运维全过程时,橡胶沥青路面的环境影响则小于典型沥青路面。该研究为未来沥青路面结构的“环境+性能”综合评价奠定了理论研究基础。

ARHM-13橡胶沥青混合料配合比设计性能及施工技术研究

本文以某高速公路扩建工程通过ARHM-13沥青混凝土面层试验段施工为依据,验证按沥青混凝土下层生产配比的混合料是否能达到设计指标和验收规范的要求,同时也检验所采用的沥青混合料及设备的上料速度、拌和数量、拌和时间、拌和温度等指标,铺装设备铺装速度,温度,自动找平;本工程段试验施工通过对试验段施工的总结,为今后指导大面积ARHM-13沥青混凝土下层施工提供重要的依据,并经工程试验段施工结果评价取得了较为理想的施工效果。

冷拌冷铺沥青混合料在高速公路施工中的应用

为研究冷拌冷铺沥青混合料在高速公路工程中的应用,论文结合实际工程,详细介绍了冷拌冷铺沥青混合料的作用机理,阐述了冷拌冷铺沥青混合料原材料设计及级配设计,重点对冷拌冷铺沥青混合料施工技术要点进行研究。

公路工程沥青路面的施工质量控制研究

公路工程的建设为人们出行提供了诸多便利,但是随着我国在交通基础设施建设投入的规模逐渐扩大,公路工程建设过程中的质量问题也越发受到重视。因此,本文针对沥青路面的结构施工过程管理和施工技术进行了探讨,分析了沥青路面的优势和特点,阐述了施工过程中应坚持的质量控制原则,并针对公路工程沥青路面施工技术进行了要点分析,提出了几种常见的质量控制办法,希望能够提升施工的质量、提升沥青路面的性能。

典型沥青路面结构路基工作区深度分析

该文基于实测“胎-路”界面条件,分别采用弹性半空间体理论、层状弹性体系理论计算不同工况下典型沥青路面结构的路基工作区深度,计算结果表明路基工作区深度随轴重显著变化,并基于计算结果提出路基工作区深度的推荐值:轴重小于100 kN时,路基工作区深度取0.8 m;轴重小于130 kN时,路基工作区深度取1 m;对于轴重小于150 kN的道路,路基工作区深度建议值为1.2 m。对于路基工作区范围内的土基,必须采取有效的工程处理措施以确保路基路面结构具备足够的承载力。

公路沥青路面施工中的铣刨摊铺施工技术探讨

铣刨摊铺施工是公路工程沥青路面施工中的关键技术,具有操作便捷、占道时间少以及质量较高等优势,在提高公路工程路面施工质量方面起到了积极的促进作用,不仅可以对道路表层进行及时修补,还可以提高路面施工的平整度,对现有的路面结构可以进行翻修,科学处理路面施工中出现的不同病害问题,提高了路面行车的安全性能,保证了路面美观性和良好的路况,为路面行车安全提供了充分保障。对此,本文将主要介绍公路沥青路面铣刨摊铺技术的应用流程和具体方式,并提出技术质量控制要点。

公路工程施工中的沥青混凝土路面施工技术分析

现阶段,大部分公路都选用了沥青混凝土作为路面材料,为了提升这种路面的稳定性和安全性,需要采取合适的施工技术。本文对沥青混凝土路面的优点进行了总结归纳,详细分析了沥青混凝土路面的拌合、运输以及摊铺等施工技术,从两个方面提出了提高沥青混凝土施工效果的方法,希望能为后续公路工程施工提供有价值的参考内容。

市政道路沥青路面平整度施工质量控制研究

我国城市公路工程沥青路面施工工艺及检测评价标准逐步提升,但仍存在沥青路面平整度问题,需改进和提升沥青混合料质量。分析了路堤填筑前的地基处理、路堤填料的选择及路堤压实的控制,对其进行改进,针对沥青路面存在的问题,从配合比设计、混合料拌和、摊铺机械及施工技术等方面入手提出相应的解决措施。

公路工程沥青路面施工技术

公路工程是现代交通运输的重要组成部分,而沥青路面作为公路工程中常见的路面类型之一,具有施工方便、维护成本低等优点,因此在公路建设中被广泛应用。该文从沥青路面施工的原理、施工工艺、施工机械设备及质量控制等方面进行详细介绍,以期为公路工程沥青路面施工提供参考和指导。