Effect of internal curing by using superabsorbent polymers (SAP) on autogenous shrinkage and other properties of a high-performance fine-grained concrete: results of a RILEM round-robin test
Effect of internal curing by using superabsorbent polymers (SAP) on autogenous shrinkage and other properties of a high-performance fine-grained concrete: results of a RILEM round-robin test
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DOI：
10.1617/s11527-013-0078-5
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发表时间：
2014-03-01
影响因子：
3.8
通讯作者：
Zhutovsky, Semion
中科院分区：
文献类型：
--
作者：
Mechtcherine, Viktor;Gorges, Michaela;Zhutovsky, Semion
本文介绍了 13 个国际研究小组（代表 15 个机构）在 RILEM 技术委员会 225-SAP“高吸水性聚合物在混凝土建筑中的应用”活动框架内进行的循环测试的结果。两种市售 SAP 材料与添加额外的水相结合，用于高性能细粒混凝土的内部固化。所有相关实验室的混凝土具有相同的混合成分，但由当地材料组成。所有人都发现，由于内部固化，自收缩率显着降低。此外，就两种特定 SAP 材料的收缩缓解效果而言，结果是一致的。这表明使用 SAP 进行内部固化是一种稳健的方法，其工作不受混凝土原材料、生产过程或测量技术的某些变化的影响。此外，还研究了内部养护对新鲜和硬化状态下混凝土其他性能的影响。这些数据也是一致的，并且大大扩展了有关含有 SAP 的混凝土材料特性的现有数据基础。
The article presents the results of a round-robin test performed by 13 international research groups (representing fifteen institutions) in the framework of the activities of the RILEM Technical Committee 225-SAP "Applications of Superabsorbent Polymers in Concrete Construction". Two commercially available SAP materials were used for internal curing of a high-performance, fine-grained concrete in combination with the addition of extra water. The concrete had the same mix composition in all laboratories involved but was composed of local materials. All found a considerable decrease in autogenous shrinkage attributable to internal curing. Also, with regard to the shrinkage-mitigating effect of both particular SAP materials, the results were consistent. This demonstrates that internal curing using SAP is a robust approach, working independently of some variations in the concretes' raw materials, production process, or measuring technique. Furthermore, the effects of internal curing on other properties of concrete in its fresh and hardened states were investigated. These are consistent as well and expand considerably the existing data basis on properties of concrete materials containing SAP.