| 1. | Research on portland cement hydration and mechanical properties of prc low water cement ratio system
低水胶比体系硅酸盐水泥水化特性与力学性能研究 |
| 2. | Under different sand ratio , the relationship between water cement ratio and 28 day compressive strength is researched and the coefficient of recycled concrete is induced
在不同砂率下,分析了再生混凝土28天龄期抗压强度与水灰比之间的关系,并回归分析得出了再生骨料系数。 |
| 3. | The purpose of this paper is to solve the problem of high water cement ratio during construction and low water cement ratio during solidification
摘要目的通过将电渗技末引入到混凝土施工过程，解决混凝土工程中施工要求的大水灰质量比与使用性能要求的小水灰质量比之间的矛盾问题。 |
| 4. | By controlling the range of the dry density , magnitude of cement and water cement ratio of mixture , the requirement of drainage property and structure strength can be fulfilled
通过控制混合料的干密度、水泥用量和水灰比的取值范围，可使混合料同时满足排水性能要求和结构强度要求。 |
| 5. | Electroosmosis technology can solve the problem of high water cement ratio during construction and low water cement ratio during solidification effectively so that have expansive application prospect
结论电渗滤水混凝土技术能有效地解决混凝土的大水灰质量比施工、小水灰质量比固化的矛盾，有重要学术价值和广阔的应用前景。 |
| 6. | Utilizing the electric double layer produced by hydration of cement to gather in superfluous water at negative electrode and reduce the water cement ratio of solidification by using electroosmosis technology
方法采用电渗技术，利用水泥水化产生的双电层的导电性能，使混凝土中的多余水分向阴极聚集，以减少混凝土的凝结水灰质量比。 |
| 7. | Water cement ratio and mixing fly ash or slag into concrete effect on ability of resisting chloride penetrating that are considered in the model . the effect of environment that include temperature , relative humidity and cumulating of surface chloride concentration of concrete are also considered . moreover , chloride diffusion changing with time is included in this model as well as
模型中考虑水灰比和混凝土配合比(掺入不同量的粉煤灰和矿渣)变化对混凝土抵抗氯离子侵蚀能力的影响，同时考虑温度、相对湿度和表面氯离子浓度累积变化等环境因素对氯离子侵入混凝土过程的影响，以及氯离子扩散系数随时间的变化。 |
| 8. | The result of experiment states hpc which initial slump is more than 230mm , after 120min is still above 190mm ; the 7d and 28d hydration , the compression strength of concrete is more than vompa and 90mpa can be made from the ground high - ti bfs instead of 10 - 30 percent of equal p . o . 525r , with the aid of superplasticizer and additive on the water cement ratio is 0 . 26
利用磨细的高钛矿渣等量取代10 - 30的硅酸盐水泥，并掺入高效减水剂b和外加剂ua ，在水灰比为0 . 26时，可以配置出初始塌落度大于230mm ， 120min后，塌落度仍大于190mm ， 7天强度大于70mpa ， 28天强度大于80mpa的高性能混凝土。 |
| 9. | Based on above , the characteristics of hydration hardening process and microstructure of hsc as well as the interfacial layer between cement paste and coarse aggregate are investigated under low water cement ratio , high content superplasticiser and with one kind or more than one kind of mineral materials condition , the reaction mechanisms of different mineral materials are also discussed
研究了不同水胶比、复合缓凝成分高效减水剂及矿物掺合料的掺加方式、掺量对高强混凝土水泥浆体水化放热过程和水泥浆体的水化热、水化放热速率以及最高温升的影响规律。探明了高强混凝土中水泥浆体的水化硬化过程、矿物掺合料之间的相互作用机理。 |
| 10. | By means of comparative experiments , this paper illustrates the influences of different cements , admixtures of flash - setting agents , water cement ratios , curing temperatures and raw materials on the performances of sprayed concrete , such as the setting time , strength and shrinkage ratio , on different conditions of efflorescence and hydration , so as to present references with regularity for the practical application of sprayed concrete
摘要通过对比试验，阐明了不同水泥、不同速凝剂掺量、水灰比、养护温度以及原材料在不同风化和水化程度条件下，对喷射混凝土凝结时间、强度、收缩率等性能的影响，以期为喷射混凝土的实际应用提供规律性的参考资料。 |
