| 1. | The experiment , results revealed that crack - resistant and water - repellent concrete prepared on those proportion had a good restricted expansion coefficient and high impermeability
通过试验研究，据此而配制的防水抗裂混凝土具有较好的限制膨胀率和抗渗性能。 |
| 2. | Petroleum and natural gas industries - materials for use in h2s - containing environments in oil and gas production - part 3 : cracking - resistant cras corrosion - resistant alloys and other alloys
石油和天然气工业.在油气生产中含h2s环境下使用的材料.第3部分:抗裂cras |
| 3. | Petroleum and natural gas industries - materials for use in h2s - containing environments in oil and gas production - part 2 : cracking - resistant carbon and low alloy steels , and the use of cast irons
石油和天然气工业.在油气生产中含h2s环境下使用的材料.第2部分:抗裂碳低合金钢和铸铁的使用 |
| 4. | Good cracking - resistant : nfs has high density and has very low cracking rate when re - used that make it more good to environment for the less sand powder occured
耐破碎性好：铸宝砂的致密性好，强度高，即使重复再生使用也很少破碎，减少铸造生产过程中的粉尘对生产环境的污染，再生性好，减少产业废物排放，利于环境保护。 |
| 5. | Their effects on the chemical shrinkage , self - shrinkage , hole structure of cement stone and on the shrinkage of mortar and concrete were also studied thoroughly , and a concrete admixture with high performance of crack - resistant and water - repellent was prepared
通过它们对水泥石的化学收缩和自收缩、孔结构以及对砂浆及混凝土的收缩性能的深入研究配制出了一种性能优良的混凝土抗裂防水外加剂。 |
| 6. | With the designing and building of yichang yangtse river highway bridge , a single - span suspension bridge with main span of 960m , some technical problems such as the layout of structural system of the suspension bridge , the type of cross section of stiffening steel box girder , the structural system of the anchor and the cracking - resistant techniques of the bulky concrete anchor have been studied in the present thesis . some valuable conclusions have been achieved that provided a substantial support for the successful completion of the bridge . the thesis contains five chapters
本文以湖北宜昌长江公路大桥(主跨为960m的单跨悬索桥)的设计与施工为背景，对大跨悬索桥设计与施工中的若干问题如悬索桥结构的合理布置、加劲钢箱梁断面型式的合理选取、锚碇结构的合理确定以及锚碇大体积混凝土设计与施工的综合防裂技术等进行了研究，取得了一批富于实用价值的研究成果，为宜昌长江公路大桥的顺利建成提供了卓有成效的技术支持。 |
| 7. | In the fourth chapter , study on the structural system and cracking - resistant in bulky concrete of the anchor , combined with the designing and building practice of the anchor in yichang yangtse river highway bridge , a optimized gravitational concrete anchor and a systemic measures for the cracking - resistant for the construction of the bulky concrete in the anchor have been developed and adopted in the bridge efficiently which demonstrates the anchor type and the measures are feasible and practical
在第4章?悬索桥锚碇合理结构型式及综合防裂技术研究中，结合宜昌长江公路大桥设计与施工的具体实践，介绍了宜昌长江公路大桥锚碇结构的合理选取，特别是介绍了宜昌长江公路大桥锚碇大体积混凝土的设计与施工中所采取的综合防裂措施。 |
| 8. | The relation between addition content of calcined kaolin , aluminium powders and aluminum sulfate in concrete and compressive strength , slump constant , 30min slump and permeability altitude were studied , and according to the experiment results , the component percent contents of crack - resistant and water - repellent admixture in cement were determined as following : calcined kaolin 6 % , aluminum sulfate 4 % and aluminium powders 0 . 005 %
通过对煅烧高岭土、铝粉、硫酸铝在混凝土中掺量对其抗压强度、初始武汉理工大学硕士学位论文坍落度、 3omin坍落度保留值及透水高度的影响，确定了配制抗裂防水外加剂的各组成成分以其占水泥质量的百分比分别为:锻烧高岭土6 % ，硫酸铝4 % ，铝粉为0 . 005 % 。 |
