Abstract Nanoclay, a thermal treated, purified attapulgite clay, has been used to increase thixotropy. However, the effect of nanoclay in presence of water reducing agent, such as PCE, on rheology, and the compatibility between nanoclay and PCE have not been well studied. The dynamic yield stress, thixotropic index, characteristic time, and microstructure of fresh cement pastes with combination of nanoclay and PCE addition are measured. It is found that nanoclay has a good compatibility with PCE. Nanoclay increases the dynamic yield stress and enhances the thixotropy of fresh cement pastes with and without PCE addition. The nanoclay addition agglomerates the microstructure at high PCE addition and increases the thixotropic index from bottom value to a high value. This study gives insight of achieving low dynamic yield stress yet high static yield stress and thixotropy mixtures.

中文翻译：

---

在聚羧酸醚减水剂 (PCE) 存在下用纳米粘土增强新鲜水泥浆的触变性

摘要 纳米粘土是一种经过热处理、纯化的凹凸棒粘土，已被用于增加触变性。然而，纳米粘土在减水剂（如 PCE）存在下对流变学的影响以及纳米粘土与 PCE 之间的相容性尚未得到很好的研究。测量了纳米粘土和 PCE 添加组合的新鲜水泥浆体的动态屈服应力、触变指数、特征时间和微观结构。发现纳米粘土与PCE具有良好的相容性。纳米粘土增加了动态屈服应力，并增强了添加和不添加 PCE 的新鲜水泥浆的触变性。纳米粘土添加在高 PCE 添加时使微观结构团聚，并将触变指数从最低值增加到高值。