正式鋪筑時(shí)，先將驗(yàn)收合格的路面基層表面進(jìn)行全面清掃，再用2～3臺森林滅火鼓風(fēng)機(jī)沿縱向排成斜線將浮灰吹凈，盡量使表面骨料外露，以利于瀝青與基層的粘結(jié)。

　　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.

　　噴灑：1）當(dāng)路面基層表面已經(jīng)干燥，在噴灑改性乳化瀝青之前一小時(shí)用灑水車快速噴灑少量水，以濕潤路面基層表面。2）噴灑采用高精度智能灑布車進(jìn)行噴灑，機(jī)械的各種輸油管道及噴嘴經(jīng)常進(jìn)行疏通、清洗，防止阻塞，始終保持機(jī)械設(shè)備良好的工作性能。3）對于灑布汽車無法作業(yè)的路段或部位，以及漏灑的部位均用手提式噴灑器進(jìn)行人工噴灑或補(bǔ)灑。4）灑布改性乳化瀝青用量：改性乳化瀝青一般為0.9-1.1kg/m2或按設(shè)計(jì)要求，集料用量約為6-8 m3/1000m2。集料撒布全部在改性乳化瀝青破乳之前完成。

　　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.

　　碾壓：集料撒布后用輪胎壓路機(jī)碾壓三遍，每次碾壓重疊1/3輪寬，碾壓由兩側(cè)到邊，確保有效壓實(shí)寬度。碾壓順序由路肩側(cè)到中分側(cè)依次碾壓。

　　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.

　　養(yǎng)護(hù)：碾壓完畢后封閉交通養(yǎng)生7天后即可開放交通。

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

　　瀝青砼路面面層

　　Asphalt concrete pavement surface layer

　　瀝青混凝土各面層施工的工藝流程圖

　　Process flow chart for the construction of asphalt concrete surface layers

　　本標(biāo)段瀝青混合料面層采用三層式結(jié)構(gòu)主線上面層采用Sup-13型改性瀝青砼，中面層采用AC-20C型中粒式改性瀝青砼，下面層采用AC-25C型粗粒式70號A級瀝青砼。

　　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.

　　各種類型結(jié)構(gòu)層的礦料級配通過率（%）范圍表

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

　　各種類型結(jié)構(gòu)層瀝青混合料的配合比設(shè)計(jì)SUP類型的瀝青混合料高性能瀝青砼路面（Superpave）采用了全新的瀝青混合料設(shè)計(jì)方法，在路面施工前必須做好瀝青混合料配合比設(shè)計(jì)。配合比設(shè)計(jì)包括目標(biāo)配合比設(shè)計(jì)、生產(chǎn)配合比設(shè)計(jì)以及生產(chǎn)配合比三個(gè)階段。

　　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.

　　根據(jù)工程實(shí)際使用的材料和設(shè)計(jì)配合比要求，計(jì)算出材料配比，在室內(nèi)拌制瀝青混合料，用旋轉(zhuǎn)壓實(shí)機(jī)成型混合料試件，計(jì)算瀝青混合料的體積指標(biāo)，確定礦料的比例和最瀝青用量。據(jù)此作為目標(biāo)配合比，供拌和樓冷料倉的供料比例、進(jìn)料速度及試拌使用。

　　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.

　　拌制高性能瀝青混合料的各項(xiàng)指標(biāo)如下：

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

　　生產(chǎn)配合比設(shè)計(jì)是將二次篩分后進(jìn)入熱料倉的材料取出篩分，再次確定各熱料倉的材料比例，同時(shí)反復(fù)調(diào)整冷料倉進(jìn)料比例，以達(dá)到供料均衡，并以目標(biāo)配合比設(shè)計(jì)的最佳用油量及最佳用油量的-0.3%、+0.3%三個(gè)瀝青用量進(jìn)行馬歇爾試驗(yàn)，檢驗(yàn)各項(xiàng)指標(biāo)，不滿足規(guī)范要求時(shí)，應(yīng)重新調(diào)整熱料倉比例，進(jìn)行級配設(shè)計(jì)。

　　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.

　　用生產(chǎn)配合比進(jìn)行試拌，瀝青混合料的技術(shù)指標(biāo)合格后鋪筑試驗(yàn)段。取試鋪用的瀝青混合料進(jìn)行馬歇爾試驗(yàn)檢驗(yàn)和瀝青含量、篩分試驗(yàn)檢驗(yàn)，由此確定正常生產(chǎn)用的標(biāo)準(zhǔn)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型瀝青混合料a、確定各礦料的組成比例。從施工現(xiàn)場分別取各類礦料進(jìn)行篩分，計(jì)算各礦料的用量，使合成的礦質(zhì)混合料級配符合本工程技術(shù)規(guī)定的范圍。此計(jì)算反復(fù)進(jìn)行，使礦質(zhì)混合料級配曲線應(yīng)接近一條順滑的曲線，其中特別注意使0.075mm、2.36mm、4.75mm的篩孔通過量控制接近標(biāo)準(zhǔn)級配的中值。

　　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、確定瀝青砼的最佳油石比用計(jì)算確定的礦料組成和最新規(guī)范推薦的油石比范圍，按0.5％間隔變化，取五個(gè)不同的油石比，用實(shí)驗(yàn)室小型拌和機(jī)拌制瀝青混合料，制備五組馬歇爾試件,每組用6個(gè)。測定試件的密度、空隙率、瀝青飽和度、穩(wěn)定度和流值，分別繪制各項(xiàng)指標(biāo)的曲線。取相應(yīng)于密度最大值的油石比al、穩(wěn)定度最大值的油石比a2和空隙率范圍中值的油石比a3，取三者的平均值作為最佳油石比初始值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.

　　求出能滿足瀝青混凝土各項(xiàng)標(biāo)準(zhǔn)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之間，則認(rèn)為設(shè)計(jì)結(jié)果是可行的，可取OAC1和OAC2的中值作為目標(biāo)配合比最佳油石比OAC，并結(jié)合當(dāng)?shù)貧夂蛱攸c(diǎn)論證地取用，其對應(yīng)的試件空隙率在3%～4.5%范圍內(nèi)。如OAC1處在上述范圍之處，調(diào)整級配，重新進(jìn)行配合比設(shè)計(jì)。

　　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、殘留穩(wěn)定度檢驗(yàn)按以上配合比制備瀝青混土馬歇爾試件，做浸水48小時(shí)馬歇爾試驗(yàn)。檢驗(yàn)殘留穩(wěn)定度，必須滿足技術(shù)規(guī)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型生產(chǎn)配合比設(shè)計(jì)a、確定各熱料倉礦料和礦粉的用量。必須從二次篩分后進(jìn)入各熱料倉的礦料取樣進(jìn)行篩分，根據(jù)篩分結(jié)果，通過計(jì)算，使礦質(zhì)混合料的級配符合技術(shù)的規(guī)定，以確定各熱料倉礦料和礦粉的用料比例，供拌和機(jī)控制室使用。同時(shí)反復(fù)調(diào)整冷料倉進(jìn)料比例，以達(dá)到供拌和機(jī)控制室使用。同時(shí)反復(fù)調(diào)整次序料倉進(jìn)料比例，以達(dá)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、確定最佳油石比。取目標(biāo)配合比設(shè)計(jì)的最佳油石比OAC和OAC±0.3%三個(gè)油石比，取以上計(jì)算的礦質(zhì)混合料，用試驗(yàn)室的小型拌和機(jī)拌制瀝青料進(jìn)行馬歇爾試驗(yàn)，確定生產(chǎn)配合比的最佳油石比。如果三組瀝青混凝土各項(xiàng)技術(shù)指標(biāo)均符合技術(shù)規(guī)定，則取中間值OAC為生產(chǎn)配合比的最佳油石比；否則應(yīng)再補(bǔ)做增減油石比的瀝青混凝土試驗(yàn)，以選定適宜的最佳油石比?；蛞設(shè)AC為中值，制備五組不同油石比的瀝青混合料按目標(biāo)配合比設(shè)計(jì)方法選定最佳油石比。

　　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、殘留穩(wěn)定度檢驗(yàn)。按以上生產(chǎn)配合比，用室內(nèi)小型拌和機(jī)拌制瀝青混合料，做浸水48小時(shí)馬歇爾試驗(yàn)，檢驗(yàn)殘留穩(wěn)定度，必須滿足技術(shù)規(guī)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型生產(chǎn)配合比驗(yàn)證階段用生產(chǎn)配合比進(jìn)行試拌，瀝青混合料的技術(shù)指標(biāo)合格后鋪筑試鋪段。取試鋪用的瀝青混合料進(jìn)行馬歇爾試驗(yàn)檢驗(yàn)和瀝青含量、篩分試驗(yàn)檢驗(yàn)，由此確定正常生產(chǎn)用的標(biāo)準(zhǔn)配合比。每個(gè)面層施工單位，通過合格的瀝青混合料組成設(shè)計(jì)，擬定試鋪路段鋪筑方案，采用重新調(diào)試的正式施工機(jī)械，鋪筑試鋪路段。

　　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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