C55混凝土配合比标准课件

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,*,C55,高性能混凝土配合比设计,一、设计依据,一、,xx,高速公路施工图设计（,xx,特大桥）,二、,JTJ041-2000,公路桥涵施工技术规范,三、耐久性设计：本桥设计基准期为,100,年；根据全国气温分布图，桥址所在区域应为严寒地区，环境类别为,类。对于预应力混凝土结构，最大氯离子含量为,0.06%,，最小水泥用量为,350kg/m,3,，最大水灰比为,0.40,，最大碱含量为,3.0kg/m,3,二、,C55,混凝土配合比技术参数,设计抗压强度：,C55,弹性模量：,3.5510,4,MPa,碱含量：,3.0kg/m,3,氯离子含量：,0.06%,设计坍落度：,180-220mm,三、原材料选用情况,1,、水泥：,xx,水泥公司生产的,DPO52.5R(,低碱,),水泥,比表面积,标准稠度,初凝时间,终凝时间,碱含量,氯离子含量,383kg/m,3,27.0%,159min,214min,0.46%,0.009%,3,天抗折,3,天抗压,28,天抗折,28,天抗压,安定性,6.1MPa,32.8MPa,8.8MPa,61.2MPa,2.5,2,、砂：,黄河砂,区中砂,细度模数,堆积密度,表观密度,含泥量,泥块含量,碱集料反应,2.7,1.595g/cm,3,2.616g/cm,3,0.6%,0.3%,0.060%,三、原材料选用情况,3,、碎石：,xx,采石场生产的,5-10mm,、,10-20mm,单粒级碎石，按,3:7,比例掺配成,5-20mm,连续级配,压碎指标值,针片状含量,含泥量,堆积密度,7.7%,2.1%,0.2%,1.560g/cm,3,母材强度,碱集料反应,泥块含量,表观密度,114.6MPa,0.031%,0.0%,2.818g/cm,3,三、原材料选用情况,三、原材料选用情况,4,、掺合料,1,：,Xx,公司生产的,C,类,级粉煤灰,5,、掺合料,2,：,xx,公司生产的,S75,矿粉；,细度,需水量比,烧失率,28d,活性指数,安定性,碱含量,氯离子,9.6%,93.6%,2.23%,71.5%,合格,3.01%,0.016%,比表面积,流动度比,烧失率,7d,活性指数,28d,活性指数,碱含量,氯离子,355m,2,/Kg,105%,1.34%,58.3%,90.4%,0.91%,0.034%,三、原材料选用情况,6,、外加剂：,xx,公司生产的聚羧酸高效减水剂。,7,、水：,xx,当地饮用水。,减水率,泌水率比,碱含量,氯离子含量,凝结时间差,7d,抗压强度比,28d,抗压强度比,21.4%,67.5%,0.62%,0.058%,-22min,133%,126%,总含盐量,PH,值,碱含量,氯离子含量,0.0003mg/mm3,7.0,14.76mg/L,9.60mg/L,四、配合比设计,1,、配制强度,fcu,ofcu,k+1.645=55+1.6456= 64.9 MPa,式中：,fcu,o,混凝土配制强度,（,MPa,）,fcu,k,混凝土立方体抗压强度标准值,（,MPa,）,混凝土强度标准差,砼强度等级,低于,20,20-35,高于,35,4.0,5.0,6.0,四、配合比设计,2,、水灰比及水胶比的确定,考虑到,JTJ041-2000,公路桥涵施工技术规范中配制高强度混凝土所用水灰,(,胶,),比宜控制在范围内；最后确定普通混凝土配合比水灰比为,0.30,，双掺混凝土配合比水胶比为,0.28,。,四、配合比设计,3,、用水量的确定,从,JGJ55-2000,表中选取每,m,3,混凝土的用水量,m,wo,=187,，已知减水剂的减水率为,21.4%,普通配合比每,m,3,混凝土实际用水量为：,m,w,= 187(1-21.4%)=147/m,3,考虑到双掺配合比中加入的掺合料能够增加混凝土的流动性，对混凝土坍落度产生了影响，每,m,3,混凝土实际用水量调整到,145/m,3,。,4,、每,m,3,混凝土水泥用量及掺合料的确定,普通配合比：每,m,3,水泥用量：,m,c,=147/0.30=490/m,3,双掺配合比：每,m,3,水泥用量：,m,c,=145/0.28=518/m,3,设定粉煤灰和矿粉的掺量同为胶凝材料用量的,14%,，可得双掺配合比混凝土水泥用量为,372/m,3,，粉煤灰和矿粉用量同为,73/m,3,。,四、配合比设计,5,、外加剂用量的确定,普通配合比外加剂每,m,3,用量为水泥总量的,1.3%,，得,6.37/m,3,；,双掺配合比外加剂每,m,3,用量为胶凝材料总量的,1.2%,，得,6.22/m,3,。,符合高效减水剂的掺量宜为胶结料的,0.5%1.8%,的要求。,6,、考虑泵送难度及确保混凝土的强度，确定普通混凝土配合比砂率为,38%,， 双掺混凝土配合比砂率为,40%,。,普通混凝土配合比假定容重为,2500/m,3,，可得：,每,m,3,混凝土砂用量,708/m,3,，每,m,3,混凝土石用量,1155/m,3,。,双掺混凝土配合比假定容重为,2500/m,3,，可得：,每,m3,混凝土砂用量,735/m,3,，每,m,3,混凝土石用量,1102/m,3,。,四、配合比设计,最后确定普通配合比及双掺配合比基准配合比每方用量如下：,单位：,(/m,3,),根据所得基准配合比，试拌,25L,用量，试验结果为：,两种混凝土配合比和易性良好，工作性良好，未出现泌水、离析现象。,C55,水泥,粉煤灰,矿粉,砂,石,外加剂,水,普通,490,0,0,708,1155,6.37,147,双掺,372,73,73,735,1102,6.22,145,C55,出机温度,(),坍落度,(mm),扩展度,(mm),实测容量,(kg/m,3,),普通,21,220,530,2528,双掺,22,220,600,2533,四、配合比设计,7,、调整配合比,普通配合比根据基准配合比水灰上下调整,0.02,，砂率,1%,，其结果如下：,拌合物性能结果如下：,C55,水泥,粉煤灰,矿粉,砂,石,外加剂,水,基准,490,0,0,708,1155,6.37,147,调整,1,459,0,0,739,1155,5.97,147,调整,2,525,0,0,676,1152,6.83,147,C55,出机温度,(),坍落度,(mm),扩展度,(mm),实测容量,(kg/m,3,),基准,21,220,530,2528,调整,1,22,205,520,2531,调整,2,24,210,540,2520,四、配合比设计,双掺配合比根据基准配合比水胶比上下调整,0.01,，砂率,1%,，其结果如下：,拌合物性能结果如下,:,实测容重与设计容重的偏差没有超过设计容重的,2%,，故不进行每方用量修正。,C55,水泥,粉煤灰,矿粉,砂,石,外加剂,水,基准,372,73,73,735,1102,6.22,145,调整,1,387,75,75,709,1109,6.44,145,调整,2,360,70,70,761,1094,6.00,145,C55,出机温度,(),坍落度,(mm),扩展度,(mm),实测容重,(kg/m,3,),基准,22,220,600,2533,调整,1,22,205,400,2520,调整,2,23,220,590,2526,五、,C55,混凝土碱含量及氯离子含量汇总表,配合比,每方砼原材料用量情况,总碱含量,(%),氯离子含量,(%),水泥,粉煤灰,矿粉,砂,石,外加剂,水,xx,Xx,公司,Xx,公司,黄河砂,Xx,采石场,Xx,公司,当地,DP.O52.5R,(低碱),C类级,S75,区中砂,5-20mm连续,级配,聚羧酸 减水剂,饮用水,双掺-基准,372,73,73,735,1102,6.22,145,2.45,0.01,双掺-调整1,387,75,75,709,1109,6.44,145,2.54,0.01,双掺-调整2,360,70,70,761,1094,6.00,145,2.37,0.01,普通-基准,490,0,0,708,1155,6.37,147,2.29,0.01,普通-调整1,459,0,0,739,1155,5.97,147,2.15,0.01,普通-调整2,525,0,0,676,1152,6.83,147,2.46,0.01,六、,xx,高速公路,C55,配合比,(,表一,),配比类型,砼强度,水灰比,水胶比,砂率,水泥,砂,石,5-10,10-20,粉煤灰,矿粉,外加剂,水,出机温度,坍落度,扩展度,实测容重,胶凝材料,强度,强度 百分率,弹模,强度 百分率,龄期,强度,轴心 强度,弹模值,C55双掺,基准,39,0.28,40,372,735,1102,331,771,73,73,6.22,145,22,220,60,0,2533,518,3d,54.6,99,0,1,1.98,2.96,0.20,0.20,0.017,0.39,5d,56.7,103,54.0,3.90,110,25L用量,9.30,18.38,27.55,8.28,19.28,1.83,1.83,0.1555,3.63,7d,59.8,109,58.2,4.11,116,45L用量,16.74,33.08,49.59,14.90,34.70,3.29,3.29,0.2799,6.53,28d,75.2,137,4.59,129,调整1,37,0.27,39,387,709,1109,333,776,75,75,6.44,145,22,205,40,0,2520,537,3d,53.6,97,0,1,1.83,2.87,0.19,0.19,0.017,0.37,5d,57.6,105,54.2,4.24,119,25L用量,9.68,17.73,27.73,8.33,19.40,1.88,1.88,0.1610,3.63,7d,61.7,112,62.3,4.32,122,45L用量,17.42,31.91,49.91,14.99,34.92,3.38,3.38,0.2898,6.53,28d,84.5,154,4.72,133,调整2,40,0.29,41,360,761,1094,328,766,70,70,6.00,145,23,220,59,0,2526,500,3d,46.8,85,0,1,2.11,3.04,0.19,0.19,0.017,0.40,5d,56.6,103,52.3,3.89,110,25L用量,9.00,19.03,27.35,8.20,19.15,1.75,1.75,0.1500,3.63,7d,58.6,107,58.6,4.04,114,45L用量,16.20,34.25,49.23,14.76,34.47,3.15,3.15,0.2700,6.53,28d,75.9,138,4.77,134,六、,xx,高速公路,C55,配合比,(,表二,),配比类型,砼强度,水灰比,水胶比,砂率,水泥,砂,石,5-10,10-20,粉煤灰,矿粉,外加剂,水,出机温度,坍落度,扩展度,实测容重,胶凝材料,强度,强度 百分率,弹模,强度 百分率,龄期,强度,轴心 强度,弹模值,C55普通,基准,30,0.30,38,490,708,1155,347,808,0,0,6.37,147,21,220,53,0,2528,490,3d,56.6,103,0,1,1.44,2.36,0.00,0.00,0.013,0.30,5d,58.6,107,46.4,3.89,110,25L用量,12.25,17.70,28.88,8.68,20.20,0.00,0.00,0.1593,3.68,7d,66.5,121,48.0,4.15,117,45L用量,22.05,31.86,51.98,15.62,36.36,0.00,0.00,0.2867,6.62,28d,75.3,137,4.32,122,调整1,32,0.32,39,459,739,1155,347,808,0,0,5.97,147,22,205,52,0,2531,459,3d,58.3,106,0,1,1.61,2.52,0.00,0.00,0.013,0.32,5d,62.8,114,43.3,3.63,102,25L用量,11.48,18.48,28.88,8.68,20.20,0.00,0.00,0.1493,3.68,7d,67.2,122,46.3,3.86,109,45L用量,20.66,33.26,51.98,15.62,36.36,0.00,0.00,0.2687,6.62,28d,69.5,126,4.32,122,调整2,28,0.28,37,525,676,1152,346,806,0,0,6.83,147,24,210,54,0,2520,525,3d,56.5,103,0,1,1.29,2.19,0.00,0.00,0.013,0.28,5d,66.5,121,51.0,3.99,112,25L用量,13.13,16.90,28.80,8.65,20.15,0.00,0.00,0.1708,3.68,7d,66.9,122,50.5,4.06,114,45L用量,23.63,30.42,51.84,15.57,36.27,0.00,0.00,0.3074,6.62,28d,81.4,148,4.15,117,六、,xx,高速公路,C55,配合比,(,表三,),配比类型,砼强度,水灰比,水胶比,砂率,水泥,砂,石,5-10,10-20,粉煤灰,矿粉,外加剂,水,出机温度,坍落度,扩展度,实测容重,胶凝材料,强度,强度 百分率,弹模,强度 百分率,龄期,强度,轴心 强度,弹模值,C55单掺,基准,29,0.28,36,475,652,1158,347,811,25,0,6.00,140,500,3d,60.9,111,0,1,1.37,2.44,0.05,0.00,0.013,0.29,5d,62.4,113,41.1,3.77,106,25L用量,11.88,16.30,28.95,8.68,20.28,0.63,0.00,0.1500,3.50,7d,65.4,119,51.5,4.11,116,45L用量,21.38,29.34,15.62,36.50,1.13,0.00,0.2700,6.30,28d,80.8,147,4.78,135,调整1,32,0.30,37,444,682,1161,348,813,23,0,5.60,140,467,3d,61.4,112,0,1,1.54,2.61,0.05,0.00,0.013,0.32,5d,63.4,115,45.7,3.64,103,25L用量,11.10,17.05,29.03,8.70,20.33,0.58,0.00,0.1400,3.50,7d,66.4,121,48.1,4.34,122,45L用量,19.98,30.69,52.25,15.66,36.59,1.04,0.00,0.2520,6.30,28d,88.0,160,4.73,133,调整2,27,0.26,35,511,620,1152,346,806,27,0,6.46,140,538,3d,54.9,100,0,1,1.21,2.25,0.05,0.00,0.013,0.27,5d,63.2,115,61.0,4.30,121,25L用量,12.78,15.50,28.80,8.65,20.15,0.68,0.00,0.1615,3.50,7d,65.8,120,66.9,4.43,125,45L用量,23.00,27.90,51.84,15.57,36.27,1.22,0.00,0.2907,6.30,28d,88.5,161,4.87,137,六、,xx,高速公路,C55,配合比,(,表四,),原材料情况,水泥,xx,水泥,DP.O52.5R(低碱),砂,黄河砂,区中砂,石,Xx,采石场,5-10mm、10-20mm按3：7的比例组成5-20mm的连续级配,粉煤灰,Xx,公司,C类级,矿粉,Xx,公司,S75,外加剂,Xx,公司,聚羧酸高效减水剂,水,当地,饮用水,试配小组成员,业主,xxx,、,xxx,总监办,xxx,、,xxx,高驻办,xxx,、,xxx,M标,xxx,、,xxx,、,xxx,、,xxx,N标,xxx,、,xxx,结 语,C55,的配合比属高强度高性能混凝土，在本工程的所有结构中是难点且重点，在设计过程中借鉴了以往使用过的配合比，同时有关专家及业主、总监办、高驻办和有关单位也给予了大力支持，使我们在设计,C55,高强度混凝土的过程中得到了宝贵的经验，在此表示衷心的感谢。,