| 1. | ( 2 ) it has been shown that the cast - in - situ piles with expanded branches or plates can provide a higher bearing capacity than common concrete bored piles
( 2 )对挤扩支盘桩能高承载力、节约成本进行了定量分析。 |
| 2. | To the common concrete , adding fly ash or blast furnace slag can decrease the shrinkage rate , but adding silica fume deteriorate the shrinkage rate
其早期收缩主要是塑性收缩，而后是冷缩和自收缩，长期收缩以干燥收缩为主。 |
| 3. | First , the steel fiber reinforced concrete and the lightweight aggregate concrete can make up the deficiencies of common concrete such as low tensile strength and large dead weight
首先，钢纤维和轻骨料能弥补普通混凝土存在的抗拉强度低和自重大等方面的不足。 |
| 4. | ( 2 ) to take full advantage of the common concrete strength testing methods : drill and rebound , fuzzy neural networks ( fnn ) was build up to evaluate concrete strength
( 2 )为了充分利用钻芯法和回弹法这两种常用混凝土测强方法的特点，建立模糊神经网络来综合评定结构的混凝土强度。 |
| 5. | Cast - in - situ piles with expanded branches or plates based on common concrete bored piles are a new type of piles foundation , which have been marked economic and social benefits
挤扩支盘桩是在普通混凝土钻孔灌注桩的基础上衍生出来的一种新型的桩基础，具有显著的经济效益和社会效益。 |
| 6. | The influence of mineral materials such as fly ash , blast furnace slag and silica fume on expansion performance of the common concrete and compensating - shrinkage concrete was researched
在此基础上，研究了高强混凝土在不同龄期的收缩规律，发现高强混凝土的收缩特性与普通混凝土存在显著不同。 |
| 7. | Firstly , this paper analyzes the influence of some factors ( such as the water / cement ratio , types of cement , curing time etc . ) on the carbonization properties of high performance concrete as well as that of common concrete
首先，对诸多因素(如水胶比、水泥品种、养护龄期等)对于高性能混凝土及普通混凝土的抗碳化能力影响程度进行定性和定量分析。 |
| 8. | ( 4 ) by using finite element method , the settlement and stress distributions both cast - in - situ piles with expanded branches or plates and common concrete bored pile have been comparied . the main differences are pointed out , which may be useful for pile design
( 4 )用有限元法对挤护支盘桩和直桩的沉降、应力分布进行分析，指出它们应力分布的异同点，这有助于桩的设计。 |
| 9. | Secondly , the paper tries to analyze and make a comparison between the common concrete and the high performance concrete regarding carbonization life span , considering the carbonization life span , the high performance concrete have the preponderance over the common one
其次，本研究对高性能混凝土和普通混凝土在抗碳化寿命预测方面作了比较分析。从抗碳化寿命预测来看，高性能混凝土有着普通混凝土无法比拟的优势。 |
| 10. | The effects of mineral additive such as fly ash , slag , and dura fiber on concrete expansive property are studied , the results show that these mineral admixture reduce shrinkage in common concrete and also reduce expansive value in shrinkage - compensating concrete
本文讨论了粉煤灰、矿渣、杜拉纤维对混凝土膨胀性能的影响，在补偿收缩混凝土中，掺合料使其膨胀率减低，杜拉纤维可以提高混凝土的体积稳定性，显著提高劈拉强度。 |
