正式铺筑时，先将验收合格的路面基层表面进行全面清扫，再用2～3台森林灭火鼓风机沿纵向排成斜线将浮灰吹净，尽量使表面骨料外露，以利于沥青与基层的粘结。

　　When officially paving, the surface of the road base that has passed the acceptance inspection should be thoroughly cleaned first. Then, 2-3 forest fire extinguishing blowers should be arranged in a diagonal line along the longitudinal direction to blow away the floating ash, and the surface aggregates should be exposed as much as possible to facilitate the bonding between the asphalt and the base.

　　喷洒：1）当路面基层表面已经干燥，在喷洒改性乳化沥青之前一小时用洒水车快速喷洒少量水，以湿润路面基层表面。2）喷洒采用高精度智能洒布车进行喷洒，机械的各种输油管道及喷嘴经常进行疏通、清洗，防止阻塞，始终保持机械设备良好的工作性能。3）对于洒布汽车无法作业的路段或部位，以及漏洒的部位均用手提式喷洒器进行人工喷洒或补洒。4）洒布改性乳化沥青用量：改性乳化沥青一般为0.9-1.1kg/m2或按设计要求，集料用量约为6-8 m3/1000m2。集料撒布全部在改性乳化沥青破乳之前完成。

　　Spray: 1) When the surface of the road base has dried, quickly spray a small amount of water with a sprinkler truck one hour before spraying modified emulsified asphalt to wet the surface of the road base. 2) High precision intelligent spraying vehicles are used for spraying, and various oil pipelines and nozzles of the machinery are regularly dredged and cleaned to prevent blockage and maintain good working performance of the mechanical equipment. 3) For sections or parts where the sprinkler truck cannot operate, as well as areas where there is leakage, manual spraying or re spraying should be carried out using a handheld sprayer. 4) The dosage of sprayed modified emulsified asphalt is generally 0.9-1.1kg/m2, or according to design requirements, the aggregate dosage is about 6-8 m3/1000m2. All aggregate spreading is completed before the demulsification of modified emulsified asphalt.

　　碾压：集料撒布后用轮胎压路机碾压三遍，每次碾压重叠1/3轮宽，碾压由两侧到边，确保有效压实宽度。碾压顺序由路肩侧到中分侧依次碾压。

　　Rolling: After the aggregate is spread, use a tire roller to roll it three times, overlapping 1/3 of the wheel width each time. The rolling should be from both sides to the edge to ensure effective compaction width. The rolling sequence is from the shoulder side to the center side.

　　养护：碾压完毕后封闭交通养生7天后即可开放交通。

　　Maintenance: After the compaction is completed, the traffic can be closed for 7 days for health preservation before the traffic can be opened.

　　沥青砼路面面层

　　Asphalt concrete pavement surface layer

　　沥青混凝土各面层施工的工艺流程图

　　Process flow chart for the construction of asphalt concrete surface layers

　　本标段沥青混合料面层采用三层式结构主线上面层采用Sup-13型改性沥青砼，中面层采用AC-20C型中粒式改性沥青砼，下面层采用AC-25C型粗粒式70号A级沥青砼。

　　The asphalt mixture surface layer of this section adopts a three-layer structure. The upper layer is made of Sup-13 modified asphalt concrete, the middle layer is made of AC-20C medium particle modified asphalt concrete, and the lower layer is made of AC-25C coarse particle 70 grade A-grade asphalt concrete.

　　各种类型结构层的矿料级配通过率（%）范围表

　　Range Table of Mineral Grading Passing Rate (%) for Various Types of Structural Layers

　　各种类型结构层沥青混合料的配合比设计SUP类型的沥青混合料高性能沥青砼路面（Superpave）采用了全新的沥青混合料设计方法，在路面施工前必须做好沥青混合料配合比设计。配合比设计包括目标配合比设计、生产配合比设计以及生产配合比三个阶段。

　　The mix design of various types of structural asphalt mixtures SUP type high-performance asphalt concrete pavement (Superpave) adopts a new asphalt mixture design method, and the asphalt mixture mix design must be done well before pavement construction. Mix design includes three stages: target mix design, production mix design, and production mix design.

　　根据工程实际使用的材料和设计配合比要求，计算出材料配比，在室内拌制沥青混合料，用旋转压实机成型混合料试件，计算沥青混合料的体积指标，确定矿料的比例和最沥青用量。据此作为目标配合比，供拌和楼冷料仓的供料比例、进料速度及试拌使用。

　　Based on the actual materials used in the project and the design mix ratio requirements, calculate the material ratio, mix the asphalt mixture indoors, use a rotary compactor to form the mixture specimen, calculate the volume index of the asphalt mixture, determine the proportion of mineral aggregate and the optimal asphalt dosage. Based on this, the target mix ratio is used for the feeding ratio, feeding speed, and trial mixing of the cold material bin in the mixing plant.

　　拌制高性能沥青混合料的各项指标如下：

　　The various indicators for mixing high-performance asphalt mixture are as follows:

　　生产配合比设计是将二次筛分后进入热料仓的材料取出筛分，再次确定各热料仓的材料比例，同时反复调整冷料仓进料比例，以达到供料均衡，并以目标配合比设计的最佳用油量及最佳用油量的-0.3%、+0.3%三个沥青用量进行马歇尔试验，检验各项指标，不满足规范要求时，应重新调整热料仓比例，进行级配设计。

　　The production mix design is to extract and screen the materials that have entered the hot material bin after secondary screening, and then determine the material ratio of each hot material bin again. At the same time, the feed ratio of the cold material bin is repeatedly adjusted to achieve a balanced supply. Marshall tests are conducted based on the optimal oil consumption and three asphalt dosages of -0.3% and+0.3% of the optimal oil consumption in the target mix design to test various indicators. If the specifications are not met, the proportion of the hot material bin should be readjusted for grading design.

　　用生产配合比进行试拌，沥青混合料的技术指标合格后铺筑试验段。取试铺用的沥青混合料进行马歇尔试验检验和沥青含量、筛分试验检验，由此确定正常生产用的标准配合比。

　　Conduct trial mixing using the production mix proportion, and lay the test section after the technical indicators of the asphalt mixture are qualified. Take the asphalt mixture used for trial paving and conduct Marshall test inspection, asphalt content and screening test inspection to determine the standard mix ratio for normal production.

　　AC-20C、AC-25C型沥青混合料a、确定各矿料的组成比例。从施工现场分别取各类矿料进行筛分，计算各矿料的用量，使合成的矿质混合料级配符合本工程技术规定的范围。此计算反复进行，使矿质混合料级配曲线应接近一条顺滑的曲线，其中特别注意使0.075mm、2.36mm、4.75mm的筛孔通过量控制接近标准级配的中值。

　　AC-20C, AC-25C asphalt mixture a. Determine the composition ratio of each mineral aggregate. Take various types of mineral materials from the construction site for screening, calculate the amount of each mineral material, and ensure that the synthesized mineral mixture gradation meets the technical requirements of this project. This calculation is repeated repeatedly to ensure that the grading curve of the mineral mixture is close to a smooth curve, with special attention paid to controlling the passage rate of the 0.075mm, 2.36mm, and 4.75mm sieve holes to be close to the median of the standard grading.

　　b、确定沥青砼的最佳油石比用计算确定的矿料组成和最新规范推荐的油石比范围，按0.5％间隔变化，取五个不同的油石比，用实验室小型拌和机拌制沥青混合料，制备五组马歇尔试件,每组用6个。测定试件的密度、空隙率、沥青饱和度、稳定度和流值，分别绘制各项指标的曲线。取相应于密度最大值的油石比al、稳定度最大值的油石比a2和空隙率范围中值的油石比a3，取三者的平均值作为最佳油石比初始值OAC1=(a1+a2+a3)/3。

　　b、 Determine the optimal asphalt to aggregate ratio for asphalt concrete by calculating the mineral composition and the recommended range of asphalt to aggregate ratio according to the latest specifications. Change the ratio at intervals of 0.5%, take five different asphalt to aggregate ratios, mix the asphalt mixture with a small laboratory mixer, and prepare five sets of Marshall specimens, with six specimens per set. Measure the density, porosity, asphalt saturation, stability, and flow value of the test specimen, and draw curves for each indicator separately. Take the oil stone ratio al corresponding to the maximum density, the oil stone ratio a2 corresponding to the maximum stability, and the oil stone ratio a3 with the median porosity range, and take the average of the three as the optimal initial oil stone ratio OAC1=(a1+a2+a3)/3.

　　求出能满足沥青混凝土各项标准的最大油石比OACmax和最小油石比OACmin，按下式取中值OAC2。

　　Find the maximum and minimum asphalt to aggregate ratios OACmax and OACmin that can meet the various standards of asphalt concrete, and take the median OAC2 according to the following formula. ? ? ? ? ?

　　OAC2＝（OACmax＋OACmin）/2如果最佳油石比的初始值OAC1在OACmax和OACmin之间，则认为设计结果是可行的，可取OAC1和OAC2的中值作为目标配合比最佳油石比OAC，并结合当地气候特点论证地取用，其对应的试件空隙率在3%～4.5%范围内。如OAC1处在上述范围之处，调整级配，重新进行配合比设计。

　　OAC2=(OACmax+OACmin)/2. If the initial value of the optimal oil stone ratio OAC1 is between OACmax and OACmin, it is considered that the design result is feasible. The median of OAC1 and OAC2 can be taken as the target mix ratio for the optimal oil stone ratio OAC, and it can be selected based on local climate characteristics. The corresponding porosity of the specimen is within the range of 3% to 4.5%. If OAC1 is within the above range, adjust the grading and redesign the mix proportion.

　　c、残留稳定度检验按以上配合比制备沥青混土马歇尔试件，做浸水48小时马歇尔试验。检验残留稳定度，必须满足技术规定。

　　c、 Prepare asphalt concrete Marshall specimens according to the above mix proportions for residual stability testing, and conduct Marshall tests by immersing them in water for 48 hours. Testing residual stability must comply with technical regulations.

　　AC型生产配合比设计a、确定各热料仓矿料和矿粉的用量。必须从二次筛分后进入各热料仓的矿料取样进行筛分，根据筛分结果，通过计算，使矿质混合料的级配符合技术的规定，以确定各热料仓矿料和矿粉的用料比例，供拌和机控制室使用。同时反复调整冷料仓进料比例，以达到供拌和机控制室使用。同时反复调整次序料仓进料比例，以达到供料均衡。

　　AC type production mix design a, determine the amount of mineral material and mineral powder used in each hot material bin. It is necessary to take samples of the mineral material entering each hot material bin after secondary screening for screening. Based on the screening results, the gradation of the mineral mixture should be calculated to meet the technical requirements, in order to determine the proportion of mineral material and mineral powder used in each hot material bin for use in the mixer control room. Simultaneously adjust the feeding ratio of the cold storage bin repeatedly to achieve the supply for the control room of the mixer. Simultaneously adjust the feeding ratio of the order silo repeatedly to achieve balanced feeding.

　　b、确定最佳油石比。取目标配合比设计的最佳油石比OAC和OAC±0.3%三个油石比，取以上计算的矿质混合料，用试验室的小型拌和机拌制沥青料进行马歇尔试验，确定生产配合比的最佳油石比。如果三组沥青混凝土各项技术指标均符合技术规定，则取中间值OAC为生产配合比的最佳油石比；否则应再补做增减油石比的沥青混凝土试验，以选定适宜的最佳油石比。或以OAC为中值，制备五组不同油石比的沥青混合料按目标配合比设计方法选定最佳油石比。

　　b、 Determine the optimal oil stone ratio. Take the optimal oil stone ratio OAC and OAC ± 0.3% of the target mix design, and use the mineral mixture calculated above to mix the asphalt material for Marshall test using a small mixer in the laboratory to determine the optimal oil stone ratio for production mix design. If all technical indicators of the three groups of asphalt concrete meet the technical regulations, the intermediate value OAC shall be taken as the optimal asphalt aggregate ratio for production mix proportion; Otherwise, additional asphalt concrete tests should be conducted to increase or decrease the oil stone ratio, in order to select the appropriate optimal oil stone ratio. Alternatively, using OAC as the median, prepare five sets of asphalt mixtures with different asphalt to aggregate ratios and select the optimal asphalt to aggregate ratio according to the target mix design method.

　　c、残留稳定度检验。按以上生产配合比，用室内小型拌和机拌制沥青混合料，做浸水48小时马歇尔试验，检验残留稳定度，必须满足技术规定。

　　c、 Residual stability test. According to the above production mix proportion, asphalt mixture shall be mixed with indoor small-scale mixer and subjected to Marshall test for 48 hours of immersion to check residual stability, which must meet the technical requirements.

　　AC型生产配合比验证阶段用生产配合比进行试拌，沥青混合料的技术指标合格后铺筑试铺段。取试铺用的沥青混合料进行马歇尔试验检验和沥青含量、筛分试验检验，由此确定正常生产用的标准配合比。每个面层施工单位，通过合格的沥青混合料组成设计，拟定试铺路段铺筑方案，采用重新调试的正式施工机械，铺筑试铺路段。

　　During the verification stage of AC type production mix proportion, trial mixing is carried out using the production mix proportion. After the technical indicators of the asphalt mixture are qualified, the trial paving section is laid. Take the asphalt mixture used for trial paving and conduct Marshall test inspection, asphalt content and screening test inspection to determine the standard mix ratio for normal production. Each surface construction unit shall prepare a trial road section paving plan through the design of qualified asphalt mixture composition, and use newly debugged formal construction machinery to pave the trial road section.

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