高压作用下水泥基粉末材料的接触硬化研究综述  

Review on the Contact Hardening Performance of Cement-based Powder Materials Under High Pressure

作　　者：张超[1,2] 张子龙 黄伟 潘阿馨 赖志超 吴天赐 黄醒东 ZHANG Chao;ZHANG Zilong;HUANG Wei;PAN Axin;LAI Zhichao;WU Tianci;HUANG Xingdong(Advanced Manufacturing College of Fuzhou University,Jinjiang 362200,Fujian,China;College of Civil Engineering,Fuzhou University,Fuzhou 350108,China;Fuzhou University Science and Education Park Development Center of Jinjiang City,Jinjiang 362200,Fujian,China;Quanzhou Licheng Xiexing Machinery Manufacturing Co.,Ltd.,Nan’an 362300,Fujian,China)

机构地区：[1]福州大学先进制造学院,福建晋江362200 [2]福州大学土木工程学院,福州350108 [3]晋江市福大科教园区发展中心,福建晋江362200 [4]泉州鲤城协兴机械制造有限公司,福建南安362300

出　　处：《材料导报》2024年第16期117-125,共9页Materials Reports

基　　金：国家自然科学基金(52178464)。

摘　　要：在高压作用下,一些具有无定型相的水泥基粉末材料会发生接触硬化现象,粉末颗粒在压力作用下发生缩聚运动,并在粉末颗粒间形成结构键,进而快速形成具有一定强度及耐水性的人造石材。本文综述了压力作用下水泥基粉末材料接触硬化的成键机理以及粉末水分含量、干燥条件、钙硅比、压制过程对其接触硬化性能影响的研究进展。相关研究结果表明,压力作用下粉末颗粒间会形成氢键、范德华力、固体桥键等结构键;粉末水分含量是影响接触硬化性能的重要因素,在压力作用下,水分可以改变粉末颗粒的表面性质并影响颗粒之间的结合,进而改变压制成品的力学性能;钙硅比对接触硬化性能的影响显著,不同粉末材料在压制时的最佳钙硅比亦是不同;摩擦力的存在降低了压制效率,造成压制成品密度、强度分布不均匀,润滑剂的加入可以有效降低摩擦力的影响;此外,降低压制模具高径比并使用双面压制可有效提升压制成品的质量。Under high pressure,some cement-based material powders with amorphous phase will undergo contact hardening,poly-condensation movement was occurred under pressure,and structural bond with certain strength will be formed between the powder particles,so as to quickly obtain artificial stone with certain strength and water resistance.In this paper,the bonding mechanism of cement-based material powder contact hardening under pressure and the effects of powder moisture content,drying conditions,calcium silicon ratio and pressing process on contact hardening performance are reviewed.Related research results show that hydrogen bonds,van der Waals forces,solid bridge bonds and other structural bonds are formed between powder particles under pressure.The moisture content of powder is an important factor affecting the contact hardening performance.Under pressure,the moisture can change the surface properties of powder particles and affect the bonding between particles,thereby influencing the mechanical properties of compaction products.The effect of calcium silicon ratio has a significant effect on the contact hardening properties,and the optimum calcium silicon ratio for different powder materials under pressing is also different.The existence of friction reduces the compaction efficiency,resulting in uneven distribution of density and strength of compacted products.The addition of lubricant can effectively reduce the influence of friction.In addition,reducing the height-diameter ratio of pressing die and using double-sided pressing can effectively improve the quality of the compaction products.

关 键 词：水泥基粉末材料 接触硬化 无定型相 结构键 水分含量 钙硅比 压制工艺 

分 类 号：TU528[建筑科学—建筑技术科学]