Durability Improvement of Cement Using Amphiphilic Calcium Carbonate Nanoparticles
Durability Improvement of Cement Using Amphiphilic Calcium Carbonate Nanoparticles
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使用两亲性碳酸钙纳米颗粒改善水泥的耐久性
DOI：
10.3390/coatings12101431
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发表时间：
2022-09
期刊：
影响因子：
3.4
通讯作者：
Qianping Ran
中科院分区：
文献类型：
--
作者：
Han Yan;Xin Shu;Dongliang Zhou;Yong Yang;Lu Chen;Qianping Ran
水泥基材料的耐久性对材料的长期性能具有重要意义。纳米材料是深度细化水泥耐久性的有前途的候选者。疏水性碳酸钙是一种应用广泛且易于获得的纳米材料。但由于其疏水性和在水中分散性差，限制了其在胶凝材料中的直接应用。在这项研究中，使用能够释放月桂醇的新型两亲性梳状分散剂对疏水性碳酸钙纳米颗粒（HbCC）进行了改性。改性的目的是改善HbCC的分散性和与水化产物的相容性。对分散性改善的碳酸钙颗粒（AmphCC）进行表征并测试其用于水泥耐久性改善的性能。结果表明，AmphCC颗粒对水泥砂浆的抗渗性能有明显的改善作用，其吸水率和氯离子渗透率均显著降低。此外，在水泥中引入AmphCC对强度发展没有显着的不利影响。与AmphCC相比，单独添加未改性的HbCC和分散剂不能达到同等的效果。AmphCC的上级效果是由于良好的颗粒分散和疏水分子的受控释放的协同效应，这是通过HbCC的分散与分散剂的结合来实现的。
The durability of cementitious materials is significant concerning long-term performance. Nanomaterials are promising candidates for deep refinement of cement durability. Hydrophobic calcium carbonate is a widely applied and easily accessible nanomaterial. However, its hydrophobicity and poor dispersity in water prohibit its direct application in cementitious materials. In this study, hydrophobic calcium carbonate nanoparticles (HbCC) were modified using a novel amphiphilic comb-shaped dispersant that is capable of laurinol release. The modification was conducted to improve the dispersity of HbCC and their compatibility with hydration products. The dispersion-improved calcium carbonate particles (AmphCC) were characterized and tested for cement durability improvement performance. According to the results, the AmphCC particles showed a pronounced effect on improving permeation resistance of cement mortars, with water absorption and chloride penetration considerably lowered. Moreover, the introduction of AmphCC in cement did not show significant adverse effects on strength development. Compared with AmphCC, a single addition of the unmodified HbCC and the dispersant cannot achieve equivalent effects. The superior effect of AmphCC is due to the synergistic effect of good particle dispersion and controlled release of the hydrophobic molecules, which is achieved by dispersion of HbCC with binding of the dispersant.
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DOI：
10.1007/s00542-020-05136-6
发表时间：
2021-01-03
影响因子：
2.1
作者：
Safaei, Babak;Davodian, Erfan;Asmael, Mohammed
通讯作者：
Asmael, Mohammed
影响因子：
11.1
作者：
M. Valipour;M. Shekarchi;M. Arezoumandi
通讯作者：
M. Valipour;M. Shekarchi;M. Arezoumandi
影响因子：
6.4
作者：
Hosan, Anwar;Shaikh, Faiz Uddin Ahmed
通讯作者：
Shaikh, Faiz Uddin Ahmed
纳米CaCO3/石灰石复合颗粒对胶凝材料水化产物及孔结构的影响
影响因子：
--
作者：
杨华山;车玉君
通讯作者：
车玉君
影响因子：
7.4
作者：
Kong, Deyu;Du, Xiangfei;Shah, Surendra P.
通讯作者：
Shah, Surendra P.