| 1. | Standard test method for autoclave expansion of hydraulic cement 水硬水泥热压膨胀的标准试验方法 |
| 2. | 3 . it is in favor of evaluating soundness of wecam by means of combining concrete autoclave expansion with its strength 3 .把混凝土的变形与混凝土的力学性能结合在一起考虑,更有利于周全评估外掺氧化镁微膨胀混凝土的安定性能。 |
| 3. | The autoclave expansion of wecam is distinctly different from one another with temperature from 150 to 200 , but it comes near from 200 to 216 under other uniform condition 在其它条件不变的情况下,外掺氧化镁混凝土的压蒸膨胀率随着保温时间的延长而增大。 |
| 4. | If magnesia is added excessively , it will cause crack , even crash . 5 . the autoclave expansion of wecam and its rate reduce under other fixed condition when fly ash ( pfa ) content increases 4 .在其它条件不变的情况下,外掺氧化镁混凝土的压蒸膨胀率随着氧化镁掺量的增加而增大,且其增幅也随之加大,控制不当,会造成混凝土开裂甚至溃散。 |
| 5. | The experimental results reveal that autoclaved concrete strength ascends its autoclave expansion ascends , but autoclaved concrete strength descends at the same time its autoclave expansion ascends when autoclave expansion is more than 0 . 1 % . 4 . the autoclave expansion of wecam and its rate rise under other fixed condition when the magnesia content increases 从实验结果看,压蒸后混凝土的强度随着压蒸膨胀率增大而增大;超过压蒸膨胀率为0 . 1 %至0 . 2 %后,压蒸后混凝土的强度随着压蒸膨胀率增大而减小,而且幅度大。 |
| 6. | In light of great harm from alkali - aggregate to concrete , the alkali activation of the limestone to be used as the aggregate for the concrete in the construction of zhangfeng reservoir is fully tested with petrographic method , accelerated mortar bar method and autoclave expansion test etc . , so as to ensure the durability of the anti - abrasion concrete therein 摘要碱骨料对混凝土的危害很大,为保证抗冲磨混凝土的耐久性采用岩相法、砂浆棒快速法、压蒸法等4种方法对阳城下川灰岩进行检验,以充分揭示张峰水库混凝土粗骨料是否存在碱活性。 |
| 7. | On this base proper autoclaving condition of weakly expansive concrete with magnesia and its evaluating standard are put forward . the main conclusions are as follows : 1 . the autoclave expansion of wecam goes up and its rate trends to mitigation when autoclave temperature rise under other fixed condition 从150经180至200增幅大,混凝土试件的压蒸膨胀率在其它条件同等的情况下有较大差异;从200经210到216增幅较小,混凝土试件的压蒸膨胀率在其它条件同等的情况下较为接近。 |
| 8. | The autoclave expansion of wecam rises under other fixed condition when autoclave time is prolonged . its rate is obvious at 150 and 180 , but unobvious at 200 , 210 and 216 . it shows that prolonging of autoclave time increases autoclave expansion of wecam effectively 从150经180至200 ,随着保温时间的延长,增幅大,对混凝土试件的压蒸膨胀率有效发挥起促进作用;从200经210到216 ,增幅较小,混凝土试件的压蒸膨胀率在其它条件同等的情况南京工业大学硕士学位论文下较为接近。 |