| 1. | Engineering application of negative temperature concrete in cold places
寒冷地区负温混凝土的工程应用 |
| 2. | Experimental study on steel fiber reinforced concrete under uniaxial compression at minus centigrade
负温钢纤维混凝土受压损伤过程的实验研究 |
| 3. | Only when the concrete strength comes to the peak value , the strain will reduce with the decrease of the temperature
混凝土应力达到峰值时的应变随负温值的增大而变小。 |
| 4. | It is concluded that the latter is 2 . 05 ~ 2 . 30 multiple than the former , and feng ' s formula approaches the practical diffusion coefficient of nthpc
通过xrd 、 sem 、 mip 、 bet激光粒度分布仪等多种测试手段研究fd一1外加剂对负温高性能棍凝土耐久性增强机理。 |
| 5. | The descending part of the curves are much sharper than the ones under the normal temperature . the ductility of the concrete will also get worse and the brittleness will increase
应力?应变曲线形状随负温值的增大变得高而窄，曲线的下降段比常温陡直，混凝土的延性变差，脆性增大。 |
| 6. | As far as i am concerned , minus - temperature concrete has a kind of critical structure , which has a corresponding critical strength , but the contrary conclusion is not true
本文认为,负温混凝土存在抗冻临界结构,一个临界强度对应着一个临界结构,而一个临界结构未必仅仅对应一个临界强度。 |
| 7. | So e2 of the concrete will decrease . this research reveals a basic viewpoint : the strength development should coordinate with expansion increase . this still can be applied
不同膨胀剂的性能存在差异， csa膨胀混凝土的负温强度与膨胀率均优于同条件下的cea膨胀混凝土，也优于复掺csa和队的混凝土。 |
| 8. | The experiment also shows that after the concrete strength reach the frost - resisting critical strength , its strength and elasticity module will increase slowly with the decrease of the temperature
试验还表明，当混凝土强度达到受冻临界强度后，随着负温值的增大其强度缓慢增长，弹性模量也有缓慢增长。 |
| 9. | Most of northern regions have a long winter . concreting in such regions is usually under minus - temperature , so it is essential to study the performance of concrete under minus - temperature
我国北方广大地区冬季气温低、时间长,混凝土施工均处于负温的条件下,因此研究负温条件下的混凝土的性能极为必要。 |
| 10. | Comparing with the standard curing , curing under minus - temperature for 7 days does harm to concrete , which performance of resisting freezing - thawing cycles and chloride diffusivity decreased after the 28d standard curing
相对于标准养护,负温养护7d会对混凝土形成损伤,转标养28d后,混凝土的抗冻性和抗氯离子渗透性均有所下降。 |
