废玻璃钢纤维增强粘结砂浆的研究
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摘要
基于废玻璃钢粉体、废玻璃钢纤维和聚合物之间的协同作用,采用响应面法进行配方优化设计,得到废玻璃钢纤维增强粘结砂浆的优化物料配比为:灰砂比1∶2、聚合物掺量8%(以水泥质量计)、废玻璃钢纤维掺量3%(以总固体量计)。为了进一步改善纤维与砂浆基体之间的界面粘结性能,对废玻璃钢纤维进行表面改性。结果表明:与改性前砂浆试样相比,采用硅烷偶联剂(质量分数为纤维的0.1%)改性后废玻璃钢纤维增强砂浆试样28 d的抗渗压力和粘结强度,分别提高12.42%和10.34%,开裂指数下降74.12%。采用SEM手段对废玻璃钢纤维增强粘结砂浆的微观形貌进行了观察,分析了废玻璃钢纤维对砂浆的增强机制。为废玻璃钢的合理处置,实现物尽其用,找到一条有效途径。
Based on the synergistic effect among waste glass fiber reinforced plastic powder, waste glass fiber and polymer, response surface method was used to optimize the design of the mortar formulation. The optimized material ratio of waste glass fiber reinforced plastic(GFRP) mortar was obtained as cement sand ratio 1∶2, polymer 8%(cement based),waste GFRP fibre 3%(based on the total solids). In order to improve the bonding strength between GFRP fibre and mortar matrix, surface modification of waste GFRP was carried out. The results show that the 28 d anti-permeability pressure and bonding strength of the modified adhesive mortar increased by 12.42% and 10.34% respectively. The cracking resistance index is decreased by 74.12%. The micro-structure of waste GFRP fiber reinforced adhesive mortar was observed by using SEM, and the reinforcing mechanism was discussed. An effective approach is found for the reasonable disposal and full use of GFRP.
Based on the synergistic effect among waste glass fiber reinforced plastic powder, waste glass fiber and polymer, response surface method was used to optimize the design of the mortar formulation. The optimized material ratio of waste glass fiber reinforced plastic(GFRP) mortar was obtained as cement sand ratio 1∶2, polymer 8%(cement based),waste GFRP fibre 3%(based on the total solids). In order to improve the bonding strength between GFRP fibre and mortar matrix, surface modification of waste GFRP was carried out. The results show that the 28 d anti-permeability pressure and bonding strength of the modified adhesive mortar increased by 12.42% and 10.34% respectively. The cracking resistance index is decreased by 74.12%. The micro-structure of waste GFRP fiber reinforced adhesive mortar was observed by using SEM, and the reinforcing mechanism was discussed. An effective approach is found for the reasonable disposal and full use of GFRP.
引文
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[3]张林文,黄勇,王继辉.美国玻璃钢回收利用概况[J].纤维复合材料,1998(3):32-34.Zhang Linwen,Huang Yong,Wang Jihui.Overview of FRP recycling in USA[J].Fiber Composites,1998(3):32-34.
[4]Broekel J,Scharr G.The specialities of fibre-reinforced plastics in terms of product life cycle management[J].Journal of Materials Processing Technology,2005(162/163):725-729.
[5]沈真,陈普会.航空复合材料技术发展的回顾和展望[C].第十一届复合材料学术会议论文集,2000:27-33.Shen Zhen,Chen Puhui.Review and Prospect of Aeronautical Composites Technology Development[C].Proceedings of the Eleventh Conference on Composite Materials,2000:27-33.
[6]高红梅,孙永峰,隆翎.热固性复合材料回收材料的性能评价及用途[C].玻璃钢学会第15届全国玻璃钢/复合材料学术年会论文集,2003:355.Guo Hongmei,Sun Yongfeng,Long Ling.Thermosetting Composites Recycled Material Performance Evaluation and Applications[C].FRP to the 15th National FRP/Composite Material Academic Conference Proceedings,2003:355.
[7]张礼和,谈慕华,马一平,等.PP纤维水泥界面粘接与抗干缩开裂性能研究[J].建筑材料学报,2001,18(1):17-21.Zhang Lihe,Tan Muhua,Ma Yiping,et al.Study on interface bonding of PP fiber-cement and antishringkage performance[J].Journal of Building Materials,2001,18(1):17-21.
[8]Wan Y Z,Wang Y L,He F,et al.Mechanical performance of hybrid bismaleimide composites reinforced with three-dimensional braided carbon and Kevlar fabrics[J].Composites,2007,38(2):495-504.
[9]Mazzoli A,Moriconi G.Particle size,size distribution and morphological evaluation of glass fiber reinforced plastic(GRP)industrial by-product[J].Micron,2014(67):169-178.
[10]Asokan P,Osmani M,Price A D F.Assessing the recycling potential of glass fibre reinforced plastic waste in concrete and cement composites[J].Journal of Cleaner Production,2009,17(9):821-829.
[11]Ribeiro M C S,Meira-Castro A C,Silva F G,et al.Reuse assessment of thermoset composite wastes as aggregate and filler replacement for concrete-polymer composite materials:a case study regarding GFRP pultrusion wastes[J].Resources Conservation&Recycling,2013,104(7):417-426.
[12]García D,Vegas I,Cacho I.Mechanical recycling of GFRP waste as short-fiber reinforcements in microconcrete[J].Construction&Building Materials,2014,64(12):293-300.
[13]Feng Y C,Zhao F Q,Xu H.Recycling and Utilization of Waste Glass Fiber Reinforced Plastics[C].MATEC Web of Conferences,2016(67):07012.
[14]李庆平.德国复合材料废弃物的回收与利用[J].玻璃钢/复合材料,1999,4(1):48.Li Qingping.Recycling and application of composite wastes in Germany[J].FRP/Composite Material,1999,4(1):48.
[15]邓京兰,祝颖丹,王继辉,等.复合材料废弃物回收与利用的回顾与展望[C].玻璃钢学会第14届全国玻璃钢复合材料学术年会论文集,2001:335.Deng Jinglan,Zhu Yingdan,Wang Jihui,et al.Review and Prospect of Recycling and Utilization of Composite Waste[C].Proceedings of the Fourteenth Annual National Symposium on FRP Composites,2001:335.
[16]齐双春,邢广恩.玻璃钢废料改性不饱和聚酯树脂的研究[J].塑料工业,2005,23(7):20-22.Qi Shuangchun,Xing Guang’en.Study on unsaturated polyester resin modified by waste glass fiber reinforced plastics[J].Plastics Industry,2005,23(7):20-22.
[17]国蓉,李剑君,国亮,等.采用响应曲面优化甘草饮片中甘草酸的超声提取工艺[J].西北农林科技大学学报:自然科学版,2006,34(9):187-192.Guo Rong,Li Jianjun,Guo Liang,et al.Optimization of ultrasonic extraction technology of glycyrrhizic acid in liquorice decoction by response surface methodology[J].Journal of Northwest Agriculture and Forestry University:Natural Science Edition,2006,34(9):187-192.