| 1. | Effects of shrinkage reducing admixture and polypropylene fiber on early age shrinkage cracking of concrete
减缩剂与聚丙烯纤维对混凝土早期收缩开裂的影响 |
| 2. | Simultanously , the influence of mineral admixture on the early - age shrinkge and early - age shrinkage mechanisms is studied in this paper
国内外关于减水剂对混凝土早期收缩影响的研究极少，本文对此进行了较为系统的研究。 |
| 3. | By the apparatus for measuring early - age shrinkage , the principle of this shrinkage and the measures to control it has been studied in this paper
通过混凝土早期收缩试验，研究探索了这种收缩的影响规律并提出相应的改善或抑制措施。 |
| 4. | A new type of apparatus for measuring early - age shrinkage is presented on the basis of advantages and disadvantages of the fellow apparatus in or abroad
综合研究国内外早期收缩测试装置的优缺点，本文改进研制出一种混凝土早期收缩自动测试装置。 |
| 5. | The paper has studied the influence of water - cement ratio on the early - age shrinkge and whole shrinkge through self - deviced experimental apparatus for measuring early - age shrinkage
通过自行设计早期收缩测试装置研究了水灰比对混凝土早期收缩的影响规律并在此基础上测试了混凝土总收缩。 |
| 6. | The ring test result shows that tendency of concrete cracking is consistent with shrinkage and veritifies early - age shrinkage is responsible for the concrete early - age crack
通过圆环法混凝土抗裂试验，验证了混凝土收缩与开裂趋势的一致性，进一步证明了早期收缩对混凝土早期裂缝的重要影响。 |
| 7. | Among them , shrinkage - reducing agent and expansion agent were more effective to respectively reduce and compensate early age shrinkage of the concrete , on the contrary , polypropylene fiber was the most effective to restrain medium and long - term shrinkage of the concrete
其中,减缩剂和膨胀剂的减缩与补偿收缩的效果主要表现在早期,而聚丙烯纤维的中长期限制效果最好。然后进行空心砌块的改性试验研究。 |
| 8. | This part is investigated in this paper . what ' s more , a new type admixtures - shrinkage - reducing admixture is also studied with respct to the concrete shrinkage . results indicates that expansive admixture and shrinkage - reducing admixture both decrease early - age shrinkage , but the shrinkage - reducing admixture has the merits of more stable shrinkage - reducing ratio , lower drop in elavation of shrinkage , more substantial reduction in overall shrinkage and so on
此外，减缩剂是一种专门用于减少混凝土干燥收缩和自收缩的新型外加剂，本文也研究了其对混凝土收缩作用效果，试验结果表明：膨胀剂和减缩剂都具有改善混凝土早期收缩的作用效果，但同膨胀剂相比，减缩剂具有减缩稳定，收缩落差小易适应变化，改善效果更明显等优点。 |
