| 1. | Research on experiment and expansion model of expansive concrete filled steel tube
钢管微膨胀混凝土试验与研究 |
| 2. | Soundness , as a vital quality index of weakly expansive concrete added with magnesia , attracts much attention of dam constructers
安定性是外掺氧化镁微膨胀混凝土的一项重要的质量指标，引起了大坝建设者的高度重视甚至担忧。 |
| 3. | Bfs can reduce the early strength of high strength superplasticized expansive concrete and make expansion effect develop fully . so high strength concrete with bfs shows higher e2
磨细矿渣的加入使高强膨胀混凝土的早期强度降低，膨胀效应得以较充分发挥，所以加入磨细矿渣的高强混凝土显示出较高的膨胀率。 |
| 4. | In this dissertation the author puts forward the concept of high performance expansive concrete ( hpec ) , and deems that hpec is a compound material of ec ( expansive concrete ) and hpc in which both sides can bring well play
本文提出了高性能膨胀混凝土( hpec )概念，认为hpec是ec (膨胀混凝土)和hpc发挥各自优势的有机结合。 |
| 5. | This provides the probability to design the expansive concrete with different expansive energy levels and different strength grades . if blast furnace slag ( bfs ) or fly ash ( fa ) is added , e2 will decrease
在hpec砂浆中掺入磨细矿渣( bfs )或粉煤灰( fa ) ，试件限制膨胀率有所下降， csa掺量越高，掺bfs或fa后限制膨胀率下降幅度越大。 |
| 6. | In this paper evaluating standards for cement and concrete in china and abroad are reviewed , and expansive behaviors of various micro - expansive concrete , added with various content of magnesia ( mgo ) and fly - ash ( pfa ) and autoclaved under different autoclaving condition , are studied
本文的主要研究成果如下： 1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压蒸温度的升高而增大，但增幅随之而减缓。 |
| 7. | After bfs is put into high strength superplasticized expansive concrete ( substituted for cement ) , autogenous shrinkage does n ' t appear in 1 day standard curing , and e2 in 14 day ' s age is higher than that of high strength superplasticized expansive concrete without bfs in the same age
高强流态膨胀混凝土掺入磨细矿渣(等量替代水泥)后，标准养护1天未出现自收缩， 14天的限制膨胀率明显高于未掺磨细矿渣的高强流态膨胀混凝土的对应值。 |
| 8. | The expansion and strength of middle strength superplasticized expansive concrete develop more coordinately . fa reduces the early strength of middle strength superplasticized expansive concrete , and this make more expansion become invalid when the concrete is in plastic state
中强流态膨胀混凝土的膨胀与强度性能发展比较协调，粉煤灰的加入降低了早期强度，使更多的膨胀变为无效膨胀消耗在仍处于塑性状态的混凝土中，混凝土限制膨胀率减小。 |
| 9. | This seemingly contrary phenomenon is rooted in the coordination of expansion and strength development : the high strength especially high early strength of high strength superplasticized expansive concrete confined expansion effect , and there is " self - restricted effect " in concrete
上述看似矛盾的现象源于膨胀混凝土的膨胀与强度的协调性：高强流态膨胀混凝土的高强度，特别是较高的早期强度限制了膨胀效应的发挥，在混凝土内部存在“自约束效应” 。 |
| 10. | The technique of dam construction by weakly expansive concrete added with magnesia ( wecam ) is a new technique developed in china , in which appropriate light - burnt magnesia is added to dam concrete when produced to generate a special delayed expansive stress to compensate shrinking stress due to decrease of temperature so as to prevent concrete cracks . it not only is in favor of simplifing the method of temperature control and an effective solution to the crack problem of concrete dam , but also simplify the technology of dam construction and bring down the project cost , further more , speed greatly up the construction of concrete dam
外掺氧化镁微膨胀混凝土筑坝技术是指在生产大坝混凝土时，掺入适量的轻烧氧化镁，利用其特有的延迟膨胀补偿混凝土坝的温度应力，以防止混凝土坝产生的裂缝，这不仅有利于简化温控措施，有效地解决混凝土坝的开裂问题；而且简化了施工工艺，降低了工程造价，大大了加快施工进展。 |
