玻璃微粉改性偏高岭土地聚物的力学性能改善研究

Improvement on Mechanical Properties of Metakaolin Geopolymer Modified by Waste Glass Powder

为探究废弃玻璃材料在偏高岭土地聚物中的潜在应用价值,本文将废弃玻璃瓶磨粉后加入偏高岭土地聚物中,进行了玻璃粉对地聚物的宏观力学性能测试。首先通过正交设计方法确认了最佳的碱激发剂模数、固含量、玻璃粉掺量、水灰比和养护方式组合,针对玻璃粉的加入会一定程度上劣化偏高岭土地聚物的强度问题,采用抽真空和添加混杂纤维的方式进行了玻璃微粉改性偏高岭土地聚物的力学性能改善研究。结果表明,抽真空可以明显改善地聚物的抗折强度和抗压强度,添加纤维能提供最佳的玻璃粉改性地聚物抗折强度,并改善地聚物的断裂韧性。

In order to investigate the application potential of waste glass in Metakaolin geopolymer(MGP),the powder milled from waste glass bottles was added to Metakaolin geopolymer to explorer the macroscopic modification mechanism.The orthogonal design method was first used to determine the best parameter combination for waste glass powder modified Metakaolin geopolymer(WMGP),such as the alkali module and solid content,dosage of waste glass powder,water-solid ratio and curing method.For the strength deterioration as the WG mixed into the MGP,vacuuming operation and the hybrid fiber were introduced to improve the mechanical properties of WMGP.The results show that the vacuum can significantly improve the flexural strength and compressive strength of the geopolymer.Adding fiber can provide the best glass powder modified geopolymer flexural strength and improve the fracture toughness of the geopolymer.