1、瀝青面層文件編號(hào)：1010齊白公路齊齊哈爾至泰來(lái)（省界）段工程建設(shè)項(xiàng)目HIGHWAYPROJECT國(guó)軍料場(chǎng)下面層AC-20目標(biāo)配合比設(shè)計(jì)齊泰公路項(xiàng)目路面工程材料配合比設(shè)計(jì)與施工期技術(shù)服務(wù)組2009年06月10日國(guó)軍料場(chǎng)下面層AC-20目標(biāo)配合比設(shè)計(jì)一概況齊泰公路下面層為AC-20。應(yīng)用國(guó)軍料場(chǎng)生產(chǎn)1926.5、9.5194.759.5mm碎石和2.364.75、04.75石屑作為下面層配合比的原材料；采用吉林省梨樹(shù)縣郭家店大頂山礦粉和安達(dá)SBS改性瀝青。開(kāi)展原材料和混合料的各項(xiàng)試驗(yàn)，確定各標(biāo)段瀝青混凝土配合比。具體試驗(yàn)簡(jiǎn)介如下：1、原材料試驗(yàn)（1）基巖無(wú)側(cè)限抗壓強(qiáng)度；（2）巖石學(xué)命名；（3）S

2、iO2含量；（4）各檔集料的篩分；（5）集料的密度；（6）集料的壓碎值；（7）粗集料的針片狀含量；（8）粗集料與瀝青的粘附性；（9）礦粉密度；（10）礦粉安定性；（11）瀝青三大指標(biāo)；（12）瀝青旋轉(zhuǎn)薄膜加熱試驗(yàn)等。2、混合料試驗(yàn)（1）馬歇爾擊實(shí)試驗(yàn)；（2）馬歇爾試件密度試驗(yàn)（表干法）；（3）瀝青混合料理論最大相對(duì)密度試驗(yàn)；（4）馬歇爾穩(wěn)定度試驗(yàn)；（5）車轍試驗(yàn)；（6）小梁低溫彎曲試驗(yàn)；（7）凍融劈裂試驗(yàn)；（8）滲水試驗(yàn)。3、試驗(yàn)依據(jù)（1）公路工程巖石試驗(yàn)規(guī)程（JTGE412005）；（2）公路工程集料試驗(yàn)規(guī)程（JTGE42-2005）;（3）公路工程瀝青及瀝青混合料試驗(yàn)規(guī)程(JTG05220

3、00);(4)公路瀝青路面設(shè)計(jì)規(guī)范(JTGD50-2006);(5)公路瀝青路面施工技術(shù)規(guī)范(JTGF40-2004)。4、試驗(yàn)設(shè)備：萬(wàn)能壓力機(jī)，標(biāo)準(zhǔn)篩，瀝青針入度儀，瀝青延度儀，電子秤，烘箱，馬歇爾擊實(shí)儀，馬歇爾穩(wěn)定度儀，車轍試驗(yàn)機(jī)，MTS等。原材料試驗(yàn)2.1集料性質(zhì)按照公路工程巖石試驗(yàn)規(guī)程(JTGE412005)評(píng)價(jià)基巖各項(xiàng)性質(zhì)，見(jiàn)表1。按照公路工程集料試驗(yàn)規(guī)程(JTGE42-2005)開(kāi)展石料和礦粉的各項(xiàng)性能試驗(yàn)，分別列于表2和表4。表1基巖各項(xiàng)性質(zhì)料源名稱SiO2含量(%)基巖抗壓強(qiáng)度(MPa)國(guó)軍石場(chǎng)橄欖玄武巖55.92118.2表2集料基本性質(zhì)匯總規(guī)格(mm)銹面碎石含量()針片狀

4、含量(%)0.075mm以下含量(%)1926.543.711.10.99.51950.318.21.34.759.551.716.71.82.364.752.004.753.5正常碎石與瀝青粘附性(級(jí))具有銹面碎石與瀝青粘附性(級(jí))壓碎值(%)基質(zhì)瀝青改性瀝青基質(zhì)瀝青改性瀝青11.73434表3單檔集料密度粒徑(mm)191613.29.54.752.361.18及以下表觀相對(duì)密度2.7462.7612.7662.7662.7782.7772.831表干相對(duì)密度2.6832.6842.6772.6682.6812.6252.611毛體積相對(duì)密度2.6472.6402.6272.6122.62

5、62.5392.491吸水率(%)1.361.651.922.132.083.394.82表4礦粉性質(zhì)試驗(yàn)項(xiàng)目表觀密度(g/cm3)親水系數(shù)塑性指數(shù)加熱安定性數(shù)值等2.7170.83.5顏色無(wú)變化2.2瀝青性質(zhì)按照公路工程瀝青及瀝青混合料試驗(yàn)規(guī)程(JTG0522000),試驗(yàn)得到SBS改性瀝青各項(xiàng)指標(biāo)，見(jiàn)表5。表5SBS改性瀝青技術(shù)指標(biāo)目標(biāo)配合比設(shè)計(jì)項(xiàng)目數(shù)值技術(shù)標(biāo)準(zhǔn)針入度(100g,5s)25C(0.1mm)716080延度(5cm/min)5C(cm)4140軟化點(diǎn)(環(huán)球法)C)75.875彈性恢復(fù)25C(%)9790運(yùn)動(dòng)粘度(Pa?S135C1.0313旋轉(zhuǎn)薄膜加熱試驗(yàn)(163C,75mi

6、n)質(zhì)量損失(%)-0.54.0針入度比(%)6765延度5C(cm)311.01.0a)RTFOT試驗(yàn)后1.62.2PAV老化后動(dòng)態(tài)剪切25CG*/sinS(kpa)6005000蠕變勁度-18C(Mpa)3100.33.1配合比初步調(diào)試根據(jù)各種規(guī)格石料和礦粉的顆粒組成，按照瀝青路面施工技術(shù)規(guī)范(JTGF402004)的級(jí)配范圍要求，初步調(diào)試混合料配合比，見(jiàn)表6。3.2確定最佳油石比采用瀝青路面施工技術(shù)規(guī)范(JTGF402004)附錄B熱拌瀝青混合料配合比設(shè)計(jì)方法。表7匯總了馬歇爾試件的毛體積密度、理論最大相對(duì)密度、空隙率、礦料間隙率、瀝青飽和度、穩(wěn)定度、流值等指標(biāo)。根據(jù)表7，繪制各項(xiàng)指標(biāo)隨

7、油石比的變化曲線，見(jiàn)圖2。按照規(guī)范要求，確定最佳油石比為4.5%。表6AC-20配合比通過(guò)下列篩孔（mm）的質(zhì)量百分率（%）篩孔1926.59.5194.759.50-4.7500.3礦粉合成下限上限31.5100100100100100100.0100.010010026.5100100100100100100.0100.01001001934.0100100100100100.093.490100162.298.4100100100100.089.4789213.2081.8100100100100.080.962809.5035.8100100100100.057.950724.7502

8、.638.084.095.4100.037.226562.36004.753.263.4100.025.316441.18000.933.240.0100.018.112330.6000.220.925.2100.013.68240.3000.28.310.398.99.05170.15000.23.84.791.76.94130.075000.21.82.082.75.637比例1050022126100圖1AC-20目標(biāo)配合比設(shè)計(jì)級(jí)配曲線表7馬歇爾設(shè)計(jì)法確定瀝青混合料最佳油石比試件編號(hào)油石比（%）試件高度（mm）空氣中質(zhì)量（g）水中質(zhì)量（g）表干質(zhì)量（g）毛體積相對(duì)密度理論最大相對(duì)密度礦料

9、合成毛體積相對(duì)密度礦料占混合料的比例（%）試件空隙率VV（%）礦料間隙率VMA（%）有效瀝青的飽和度VFA（%）馬歇爾穩(wěn)定度MS（kN）流值FL（0.1mm）1234平均（0）（1）（2）（3）（4）（5）（6）（7）（8）（9）（10）（11）（12）（13）（14）A-13.564.5064.3464.2264.3464.351146.8651.91149.32.3062.4982.55496.67.712.839.79.5035.8A-23.564.2864.5464.2064.3864.351144.4664.31155.42.3302.4982.55496.66.711.843.38

10、.0633.5A-33.564.1464.2463.9864.6064.241143.6664.21154.22.3342.4982.55496.66.611.743.99.1532.5平均3.52.3237.012.142.38.9033.9B-14.064.2664.4264.2064.4664.341159.9670.51164.42.3482.4662.55496.24.811.658.910.0234.2B-24.064.8264.4664.8064.9064.751163.2675.81167.62.3652.4662.55496.24.111.062.78.0333.3B-34.

11、065.0065.3664.8864.3664.901154.5666.91160.42.3392.4662.55496.25.111.957.08.3736.5平均4.02.3514.711.559.58.8134.7C-14.564.0063.8664.2463.8063.981143.6663.41146.92.3652.4552.55495.73.711.467.910.3335.6C-24.564.1064.1664.2064.0264.121141.8663.71145.42.3702.4552.55495.73.411.269.211.0337.2C-34.563.8464.00

12、63.7063.8463.851148.2667.41151.82.3702.4552.55495.73.411.269.212.9938.9平均4.52.3693.511.368.711.4537.2D-15.063.7463.7263.3063.4463.551154.8666.41156.72.3552.4412.55495.23.512.271.29.8338.4D-25.063.9463.2063.0063.9063.511159.1668.81160.32.3582.4412.55495.23.412.171.911.6739.2D-35.064.1664.4063.7064.16

13、64.111153.9668.11157.82.3562.4412.55495.23.512.171.49.9537.5平均5.02.3573.512.171.510.4838.4E-15.564.3463.4464.3463.7063.961158.6672.31163.52.3592.4392.55494.83.312.573.68.2841.6E-25.563.2663.0062.8663.3063.111156.3670.11157.92.3702.4392.55494.82.812.076.68.4445.3E-35.563.9863.3663.8464.1063.821148.66

14、65.01150.62.3652.4392.55494.83.012.275.38.4738.1平均5.52.3653.012.275.28.4041.790080.000600500400486422.333344.5555油石比3,5404.55,05.514.0Lfew,4.03.02.0、-480706.0鈦05.53.001、/、700oQoO19油-：1出11n圖2馬歇爾試件各項(xiàng)指標(biāo)隨油石比變化曲線45.013.012.0O10.0曲石比%25.0油兀比f(wàn)40.0二535.030.03.3混合料路用性能評(píng)價(jià)瀝青混合料的高溫、低溫和水穩(wěn)定性能分別用車轍試驗(yàn)、低溫小梁彎曲試驗(yàn)和凍融劈裂

15、試驗(yàn)來(lái)評(píng)價(jià)。另外，瀝青混合料的密水性用滲水試驗(yàn)來(lái)評(píng)價(jià)。低溫小梁彎曲試驗(yàn)在后續(xù)工作中補(bǔ)充?；旌狭蠞B水性能在鋪筑的下面層試驗(yàn)段上開(kāi)展。各項(xiàng)性能的試驗(yàn)結(jié)果匯總在表8中，詳細(xì)的試驗(yàn)數(shù)據(jù)分別見(jiàn)表9表11。表8瀝青混合料各項(xiàng)路用性能匯總指標(biāo)動(dòng)穩(wěn)定度（次/mm）最大彎拉應(yīng)變（曲）彎曲勁度模量（MPa）凍融劈裂強(qiáng)度比（%）滲水系數(shù)（mL/min）數(shù)值65752210497182.2試驗(yàn)段實(shí)測(cè)3.4結(jié)論AC-20目標(biāo)配合比滿足各項(xiàng)路用性能要求。表9瀝青混合料車轍試驗(yàn)試件編號(hào)45min深度（mm）60min深度（mm）試驗(yàn)機(jī)類型修正系數(shù)試件系數(shù)試驗(yàn)輪往返碾壓速度（mm/min）動(dòng)穩(wěn)定度（次/mm）平均（次/mm）

16、11.571.66700021.821.911.01.0427000657531.651.765727表10瀝青混合料凍融劈裂試驗(yàn)編號(hào)空氣中質(zhì)量（g）水中質(zhì)量（g）表干質(zhì)量（g）吸水率（%）毛體積相對(duì)密度理論最大相對(duì)密度空隙率（%）高度（mm）均值（mm）Pt（kN）RT（MPa）TSR（%）11152.2661.51159.90.712.3122.455r5.864.1264.3264.0064.1864.166.320.6282.221161.9667.81168.00.52.3232.4555.463.9264.0063.7863.8863.906.080.6031158.6665.81

17、162.10.32.3342.4554.963.5863.7063.9664.4263.925.930.5841159.4666.91163.60.42.3342.455r4.963.4063.3863.5063.6463.485.850.5851161.4670.71166.10.42.3442.4554.564.0064.0864.5064.0064.156.280.6261156.0665.51159.60.32.3402.4554.764.1263.3463.4063.9263.707.530.7471157.6667.21160.50.3:2.3472.455P4.462.9063.

18、1463.3863.1063.137.740.7781158.1668.51160.90.22.3522.4554.263.7463.6064.0064.0063.847.570.7591158.2668.21162.80.4:2.3422.455:4.664.6065.0065.3264.9064.966.810.66101154.5664.51158.70.42.3362.4554.863.6663.5264.1663.7263.777.350.72表11瀝青混合料低溫小梁彎曲試驗(yàn)序號(hào)ma/gmw/gmf/gY(g/cm3)Y(g/cm3)VV/%d/mmPB/kNb/mmh/mmL/mmRB/MPa班氏）平均SB(MPa)平均1598.3343.7599.72.33