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Current developments and future needs in standards for cementitious materials

机译：水泥材料标准的当前发展和未来需求

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Globally, test methods and requirements in portland cement specifications are very similar and, while suitable as manufacturing standards, in many respects they do not address the needs of the concrete producer. Cement is only one ingredient in the cement paste matrix that binds concrete, and all paste matrix components (such as pozzolans, slags, ground limestone and chemical admixtures), influence concrete performance. Recent developments in standards for cementitious materials are reviewed. In addition, new types of binders are being developed and used for making concrete, and current test methods cited in specifications are not often directly suitable for use in their evaluation. Thus, modified or completely new test methods may be needed. Due to limited experience with field performance, new specifications for novel materials also need to address more than the limits on setting time and strength development found in current cement standards. Issues related to developing new standards are discussed.
机译：在全球范围内，波特兰水泥规格的测试方法和要求非常相似，而适合作为制造标准，在许多方面，它们不会满足混凝土生产商的需求。水泥仅在水泥浆料基质中只结合混凝土，以及所有粘贴基质组分（如火山灰，渣，地面石灰石和化学混合物），影响混凝土性能。综述了胶凝材料标准的最新发展。此外，正在开发新型的粘合剂并用于制造混凝土，并且规格中引用的当前测试方法通常不适合在其评估中使用。因此，可能需要修改或完全新的测试方法。由于现场性能有限，新材料的新规格还需要解决当前水泥标准中发现的设定时间和强度发展的限制。讨论了与开发新标准相关的问题。

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