| 摘要: |
| 从水化过程、力学性能、收缩性能等方面系统研究了2种水玻璃对苯丙乳液（SA乳液）改性碱激发矿渣（AAS）性能的影响及其作用机理，以期指导SA乳液在AAS中的应用.结果表明：钾水玻璃（PWG）加速矿渣水化进程的能力强于钠水玻璃（SWG）；SA乳液不影响AAS的水化进程，不会阻碍水化硅酸钙/水化硅铝酸钙的生成，但会抑制水滑石的生成；SA乳液显著降低了AAS的抗压强度，并且对PWG激发AAS的影响强于SWG激发AAS；AAS的抗折强度随着SA乳液掺量的增加呈先增大后减小的趋势，在SWG与PWG激发AAS中，SA乳液的最佳掺量分别为2.5%与5.0%；PWG激发AAS在14 d内的总变形量高于SWG激发AAS，SA乳液可显著降低硬化浆体的总收缩量. |
| 关键词: 水玻璃 聚合物乳液 碱激发矿渣 水化进程 力学性能 |
| DOI：10.3969/j.issn.1007-9629.2024.06.008 |
| 分类号:TU528.042 |
| 基金项目:非金属材料创新中心TDA项目（2023TDA6-2） |
|
| Effect of Different Water Glass on Properties of Polymer Modified Slag |
|
PAN Ye1,2, LU Zichen1,2, YANG Xiaojie1,2, MA Yiping1,2
|
|
1.Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education， Tongji University， Shanghai 201804， China;2.School of Materials Science and Engineering， Tongji University， Shanghai 201804， China
|
| Abstract: |
| The effects of two types of water glass on the properties of styrene-acrylic latex（SA latex） modified alkali-activated slag（AAS） were investigated from hydration process， mechanical strength and shrinkage. The results show that potassium water glass（PWG） is stronger to accelerate the hydration process of slag than sodium water glass（SWG）. The SA latex does not hinder the hydration process of AAS and the formation of hydrate calcium silicate/stratlingite， but inhibits the formation of hydrotalcite. The SA latex significantly reduces the compressive strength of AAS， and its effect on PWG-activated slag is stronger than SWG-activated slag. The flexural strength of AAS shows a tendency to firstly increase and then reduce along with the increased SA latex dosage. The optimal dosages of the SA latex in SWG-activated slag and PWG-activated slag are 2.5% and 5.0%， respectively. The total deformation caused by PWG was higher than that of SWG in 14 d， and the SA latex can significantly reduce the total shrinkage of hardened pastes. |
| Key words: water glass polymer latex alkali-activated slag hydration mechanical property |
