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为了促进废玻璃粉(WGP)在水泥基材料中的回收利用，研究了纳米SiO2和玻璃粉单掺、复掺对砂浆力学性能与抗冻性的影响，并采用热重分析(TG-DTA)和压汞法(MIP)分析影响机理。结果表明：玻璃粉使砂浆抗压和抗折强度降低，而纳米SiO2对含玻璃粉水泥砂浆的强度发展具有积极作用，掺入3%纳米SiO2可补偿相应的强度损失。10%替代量的玻璃粉使砂浆抗冻性略有提高，替代量超过10%后，抗冻性降低。玻璃粉替代量不变时，3%纳米SiO2可显著改善含玻璃粉水泥砂浆的抗冻性。TG-DTA显示，纳米SiO2促进了含玻璃粉水泥砂浆的水化，生成了更多的C-S-H凝胶；MIP显示，纳米SiO2显著降低了含玻璃粉水泥砂浆的孔隙率，优化了孔径分布。综合评估纳米SiO2和玻璃粉对水泥砂浆力学及抗冻性的影响后，建议20%玻璃粉和3%纳米SiO2复掺，以最大限度利用玻璃粉。
Abstract：In order to promote the recycling of waste glass powder(WGP)in cement-based materials, nano-SiO2 was added to improve the mechanics and frost resistance of cement mortar containing glass powder. The effects of single-doped nano-SiO2, glass powder and their combination on the mechanical properties and frost resistance of mortar were studied. The influence mechanism was analyzed by TG-DTA and MIP. The results show that the glass powder reduces the compressive and flexural strength of mortar.However, nano-SiO2 has a a great influence on the strength development of cement mortar containing glass powder, and the incorporation of 3% nano-SiO2 can compensate for the corresponding strength loss. The frost resistance of mortar increases slightly with the substitution of 10% glass powder. When the substitution of glass powder exceeds 10%, the frost resistance of mortar decreases with the increase of the substitution of glass powder. When the substitution amount of glass powder is constant, 3% nano-SiO2 can significantly improve the frost resistance of cement mortar containing glass powder.TG-DTA showed that nano-SiO2 promoted the hydration of glass powder cement slurry and generated more C-S-H gels.MIP showed that nano-SiO2 significantly reduced the porosity of cement mortar containing glass powder and optimized the pore size distribution. After a comprehensive evaluation of the effects of nano-SiO2 and WGP on the mechanical and frost resistance of cement mortar, it is suggested that 20% glass powder and 3% nano-SiO2 should be mixed together to maximize the use of glass powder.
[1] SOUSA V,BOGAS J A.Comparison of energy consumption and carbon emissions from clinker and recycled cement production[J].Journal of Cleaner Production,2021,306:127277.
[2] 陈彦红，陈季，杨建新，等.大体积现浇抗裂混凝土施工裂缝防治研究[J].森林工程，2021,37(1):105-110.
[3] 商务部流通业发展司.商务部发布中国再生资源回收行业发展报告(2018)[J].资源再生，2018(6):42-51.
[4] LI Q,QIAO H,LI A,et al.Performance of waste glass powder as a pozzolanic material in blended cement mortar[J].Construction and Building Materials,2022,324:126531.
[5] KHAN M N N,SAHA A K,SARKER P K.Reuse of waste glass as a supplementary binder and aggregate for sustainable cement-based construction materials:a review[J].Journal of Building Engineering,2020,28:101052.
[6] 符骏，柯国军，邹品玉，等.玻璃粉掺量对混凝土抗冻性能的影响[J].混凝土，2017(2):77-79,83.
[7] MATOS A M,SOUSA-COUTINHO J.Durability of mortar using waste glass powder as cement replacement[J].Construction and Building Materials,2012,36:205-15.
[8] 胡争，陈克政，黄帅，等.洗盐对碳酸盐渍土的物理特性影响[J].森林工程，2021,37(5):105-110.
[9] 安田鑫，柯国军，宋百姓，等.废玻璃粉对混凝土干燥收缩特性的影响[J].混凝土，2016(12):94-96,101.
[10] LU J X,POON C S.Improvement of early-age properties for glass-cement mortar by adding nanosilica[J].Cement and Concrete Composites,2018,89:18-30.
[11] BOUKHELF F,CHERIF R,TRABELSI A,et al.On the hygrothermal behavior of concrete containing glass powder and silica fume[J].Journal of Cleaner Production,2021,318:128647.
[12] NAHI S,LEKLOU N,KHELIDJ A,et al.Properties of cement pastes and mortars containing recycled green glass powder[J].Construction and Building Materials,2020,262:120875.
[13] RAMADAN M,EL-GAMAL S M A,SELIM F A.Mechanical properties,radiation mitigation and fire resistance of OPC-recycled glass powder composites containing nanoparticles[J].Construction and Building Materials,2020,251:118703.
[14] WANG Y,LI J,HE X,et al.Effects of wet-grinded superfine waste glass on the fresh properties and reaction characteristic of cement pastes[J].Construction and Building Materials,2020,247:118593.
[15] YANG H,MONASTERIO M,ZHENG D,et al.Effects of nano silica on the properties of cement-based materials:a comprehensive review[J].Construction and Building Materials,2021,282:122715.
[16] WIESNER M R,BOTTERO J Y.Environmental nanotechnology:applications and impacts of nanomaterials[M].Second Edition.New York:McGraw-Hill Education,2017.
[17] MA B,WANG J,TAN H,et al.Utilization of waste marble powder in cement-based materials by incorporating nano silica [J].Construction and Building Materials,2019,211:139-149.
[18] JOSHAGHANI A,MOEINI M A.Evaluating the effects of sugar cane bagasse ash (SCBA) and nanosilica on the mechanical and durability properties of mortar[J].Construction and Building Materials,2017,152:818-831.
[19] 肖建庄，陈祥磊，李标，等.纳米SiO2和粉煤灰复掺对再生混凝土性能的影响[J].建筑科学与工程学报，2020,37(1):26-32.
[20] WANG J,LIU M,WANG Y,et al.Synergistic effects of nano-silica and fly ash on properties of cement-based composites [J].Construction and Building Materials,2020,262:120737.
[21] LIU G,FLOREA M V A,BROUWERS H J H.Performance evaluation of sustainable high strength mortars incorporating high volume waste glass as binder[J].Construction and Building Materials,2019,202:574-88.
[22] DU H,TAN K H.Properties of high volume glass powder concrete[J].Cement and Concrete Composites,2017,75:22-9.
[23] SU Y,LI J,WU C,et al.Influences of nano-particles on dynamic strength of ultra-high performance concrete[J].Composites Part B:Engineering,2016,91:595-609.
[24] DU Y,YANG W,GE Y,et al.Thermal conductivity of cement paste containing waste glass powder,metakaolin and limestone filler as supplementary cementitious material[J].Journal of Cleaner Production,2021,287:125018.
[25] LETELIER V,HENRíQUEZ-JARA B I,MANOSALVA M,et al.Use of waste glass as a replacement for raw materials in mortars with a lower environmental impact[J].Energies(Basel),2019,12(10):1974.
[26] 刘光焰，樊磊，金大智，等.纳米二氧化硅对玻璃粉水泥体系水化硬化的影响[J].硅酸盐通报，2017,36(6):2112-2116.
[27] TAYLOR H F W.Cement chemistry[M].London:Academic Press Limited,1990.
[28] YANG C C.On the relationship between pore structure and chloride diffusivity from accelerated chloride migration test in cement-based materials[J].Cement and Concrete Research,2006,36(7):1304-1311.
基本信息:
DOI：10.19782/j.cnki.1674-0610.2023.04.018
中图分类号:X705;TQ127.2;TQ177.62
引用信息:
[1]龚建清,郭丽,杨倩,等.复掺纳米SiO_2和玻璃粉对水泥砂浆性能的影响研究[J].公路工程,2023,48(04):121-126+150.DOI:10.19782/j.cnki.1674-0610.2023.04.018.
基金信息:
湖南省交通厅科技项目(201714)
2023-08-20
2023-08-20