Summary of Rubber Modified Asphalt Product Specifications around ...

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(3)沥青混合料运输车的运量应较拌和能力和摊铺速度有所富余,根据工程规模摊铺机前方应有3~5辆运料车等候卸料。染环境。 (4)运料车应有良好的篷布覆盖设施,卸料过程中继续覆盖,直到卸料结束取走篷布,以资保温并避免污 (5)连续摊铺过程中,运料车在摊铺机前10~30cm处停住,不得撞击摊铺机。卸料过程中运料车应挂空档,靠摊铺机推动前进。 5、沥青混合料的摊铺 Paving Operation (1)连续稳定地摊铺,是提高路面平整度最主要措施。对于橡胶沥青混凝土,摊铺机的摊铺速度应根据拌和楼的产量、施工机械配套情况及摊铺厚度、摊铺宽度,按1~3m/min予以调整选择,做到缓慢、均匀、不间断地摊铺。用餐应分批轮换交替进行,切忌停铺用餐,争取做到每天收工停机一次。 (2)用机械摊铺的混合料未压实前,施工人员不得进入踩踏。一般情况下不得采用人工整修。 (3)AR- AC沥青混合料上面层采用非接触式平衡梁装置控制摊铺厚度。两台摊铺机距离不应超过10m,以形成良好的热接缝。 (4)摊铺机应调整到最佳工作状态,调好螺旋布料器两端的自动料位器,并使料门开度、链板送料器的速度和螺旋布料器的转速相匹配。螺旋布料器中的混合料以略高于螺旋布料器2/3为度,使熨平板的挡板前混合料的高度在全宽范围内保持一致,避免摊铺层出现离析现象。 (5)检测松铺厚度是否符合规定,以便随时进行调整。摊前熨平板应预热至规定温度。摊铺机熨平板必须拼接紧密,不许存有缝隙,防止卡入粒料将铺面拉出条痕。机摊铺。 (6)摊铺遇雨时,立即停止施工,并清除未压实成型的混合料。遭受雨淋的混合料应废弃,不得卸入摊铺 6、沥青混合料的压实成型 (1)沥青混合料的压实是保证沥青面层质量的重要环节,应选择合理的压路机组合方式及碾压步骤。为保证压实度和平整度,初压应尽量在摊铺后较高温度下及时进行。为防止橡胶沥青粘结橡胶轮胎,AR- AC沥青混凝土不宜使用胶轮压路机。Penumatic roller is not allowed to prevent pick up. (2)橡胶沥青混合料压实工艺分为初压、复压和终压。碾压工艺通过试铺段确定。 (3)压路机应以缓慢而均匀的速度碾压,压路机的适宜碾压速度建议按表10选用。 205
压路机类型 Type <strong>of</strong> Roller 静载钢轮压路机 Static Steel Drum Roller 钢轮振动压路机 Vabratory Steel Drum Roller 表10 压路机碾压速度(km/h) Table 10. Speed <strong>of</strong> Roller (km/hr) 初压 Breakdown 复压 Intermediate 终压 Finish 2~3 —— 3~6 2~4 3~5 —— (4)为避免碾压时混合料推挤产生拥包,碾压时应将驱动轮朝向摊铺机;碾压路线及方向不应突然改变; 压路机起动、停止必须减速缓行,不准刹车制动。压路机折回不应处在同一横断面上。 (5)初压应紧跟摊铺机进行碾压,随摊铺机逐步推进。复压、终压应分清段落,设置明显标志,便于司机辩认。对松铺厚度、碾压顺序、压路机组合、碾压遍数、碾压速度及碾压温度应设专岗管理和检查,使面层做到既不漏压也不超压。 (6)压实完成12小时后,方能允许施工车辆通行。 7、施工接缝的处理 (1)纵向施工缝。对于采用两台摊铺机成梯队联合摊铺方式的纵向接缝,应在前部已摊铺混合料部分留下1 0~20cm宽暂不碾压作为后高程基准面,并有5~10cm左右的摊铺层重叠,以热接缝形式在最后作跨接缝碾压以消除缝迹。上中层纵缝应错开15cm以上。 (2)横向施工缝。全部采用平接缝。用三米直尺沿纵向位置,在摊铺段端部的直尺呈悬臂状,以摊铺层与直尺脱离接触处定出接缝位置,用锯缝机割齐后铲除;继续摊铺时,应将摊铺层锯切时留下的灰浆冲洗干净,涂上少量粘层沥青,摊铺机熨平板从接缝处起步摊铺;碾压时用钢筒式压路机进行横向压实,从先铺路面上跨缝逐渐移向新铺面层。 206
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Summary of Rubber Modified Asphalt
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Acknowledgements We appreciate the
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Appendix I: Arizona Asphalt Rubber
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3.0 Asphalt Rubber Binder Specifica
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Agencies Source Gradation Additives
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Agencies Source Gradation Additives
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Agency CRM percentage Blending temp
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4.2 Material Property Testing of Te
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Table 4. Mix Design Parameter Compa
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under snow plow activity and freeze
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6.0 Terminal Blend Mix Specificatio
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Agency Ambient/pavement temperature
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8.2 Construction of Asphalt Rubber
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9.0 Summary and Recommendations for
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Appendix A: Ontario Specifications
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compound. Continue blending the RA
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1151.05.06.04 Rubberized Asphalt Ce
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i. Acceptance and pay adjustment of
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centipoises (see Note 1) LP-11 Cone
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1151.03 DEFINITIONS Section 1151.03
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1151.05.06 Rubber Modified Asphalt
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313.07.06.02 Paving Clause 313.07.0
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a) PFGAC, if the PFGAC is less than
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Appendix B: Ontario Specifications
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D. A letter from the CR supplier in
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313.07.15.06 Rubber Modified Asphal
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considered to be 0.65. Table R1 Tri
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supplier provides ingredients and i
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The Contractor shall be solely resp
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Section Limit defines the chainage
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The referee laboratory will be desi
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RUBBERIZED ASPHALT CONCRETE MIXTURE
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The CRM shall be sufficiently dry s
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special provisions. 2. The minimum
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AGGREGATE The aggregate for Type G
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manner specified for asphalt concre
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C. Asphalt modifier shall be tested
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B. Place one rubber ball on each si
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Test Parameter ASPHALT-RUBBER BINDE
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A. The temperature of the aggregate
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modifier. ASPHALT MODIFIER The asph
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sieve and record that number (next
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The Contractor shall provide a Haak
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modifier, and CRM. Paving asphalt a
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not more than 163°C after applying
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Appendix G: California Terminal Ble
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6. California Test 371 test results
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Prepaving Conference Schedule a pre
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HMA Acceptance Quality Characterist
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Quality Characteristic Hot Mix Asph
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3. Isolating the scale system withi
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if the atmospheric temperature is b
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3. From the center of the specified
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The asphalt-rubber shall contain a
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Appendix J: Arizona Specifications
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TABLE 413-3 MINERAL AGGREGATE CHARA
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source(s) of mineral aggregate, pro
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413-7 Construction Requirements: 41
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discharge chute of the drier in ord
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Screeds shall include any strike-of
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in nominal thickness. (C) Rolling P
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Appendix K: Arizona Specifications
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TABLE 414-3 MINERAL ADMIXTURE Mater
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414-6.02 Mineral Aggregate: Aggrega
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Mineral admixture shall be mechanic
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Before asphaltic concrete is placed
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furnished with the machine: Ski-typ
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The accepted quantities of asphalti
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Asphalt-Rubber Stress-Absorbing Mem
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If the asphalt-rubber membrane has
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Appendix M: Texas Asphalt Rubber Sp
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• a modifier is introduced separa
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A and B aggregates differ by more t
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Flat and elongated particles Tex-28
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When shown on the plans, the Engine
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(16) Development of JMF3. Evaluate
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At any time during production, the
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acceptable tolerances listed in Tab
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Appendix O: Texas Specifications -
Page 159 and 160: Gradation Requirements for Mineral
Page 161 and 162: Table 4 (continued) Test Methods, T
Page 163 and 164: Table 6 Master Gradation Bands (% P
Page 165 and 166: (13) Trial Batch Testing. Test the
Page 167 and 168: Hamburg Wheel tests meet the specif
Page 169 and 170: air voids will be determined based
Page 171 and 172: Contractor’s or the Engineer’s
Page 173 and 174: may make as many independent densit
Page 175 and 176: In-Place Placement Pay In-Place Pla
Page 177 and 178: a sampling port. Keep A-R binder fr
Page 179 and 180: type, grade and surface aggregate c
Page 181 and 182: Control records shall include at a
Page 183 and 184: Appendix R: Florida Asphalt Rubber
Page 185 and 186: 341-8 Placement of Asphalt Concrete
Page 187 and 188: AR-OGFC as specified in 401.03.03.E
Page 189 and 190: Submit to the ME a certification of
Page 191 and 192: Table 902.07.03-1 JMF Master Ranges
Page 193 and 194: Table 902.07.04-1 Production Contro
Page 195 and 196: Appendix T: Massachusetts Asphalt R
Page 197 and 198: °C per hour. 6. Mechanical Blender
Page 199 and 200: Appendix U: China Asphalt Rubber Sp
Page 201 and 202: g/cm 3 . It should not contain stee
Page 203 and 204: S16 0~3 100 80~100 50~80 25~60 8~45
Page 205 and 206: 矿料间隙率VMA (%) 不小于 19
Page 207 and 208: 试件击实温度 160~170 试件
Page 209: 初压开始温度 breakdown roller
Page 213 and 214: 0.075mm ±2 ≤ 2.36mm 逐盘在线
Page 215 and 216: Blend Composition: 13.0% - 12.5mm A
Page 217 and 218: Percent Passing 100 90 80 70 60 50
Page 219 and 220: Draft 9-25-2011 % Air Voids 9.0 8.0
Page 221 and 222: Draft 9-25-2011 VFA 90.0 85.0 80.0
Page 223: Draft 9-25-2011 218
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