基于硫氧镁水泥的固化硼废弃物抗压强度研究
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摘要
目的研究不同制备工艺、不同原料配比对硫氧镁水泥固化硼废弃物抗压强度的影响,选出最佳配比,为提高硼废弃物利用率提供新思路.方法用硫酸与废弃物中氧化镁反应,研究反应后的静置时间以及原料配合比对硫氧镁水泥净浆试样的性能影响,测试其抗压强度,并用XRD测试其水化产物.结果硼废弃物与硫酸反应制备浆体的静置时间为20 min、硼废弃物质量分数为40%、水灰比为0. 5、硫酸与氧化镁质量比为1∶2时,硫氧镁水泥试样的抗压强度最高.结论随着硼废弃物与硫酸反应制备的浆体的静置时间、水灰比、硫酸与氧化镁的质量比、硫酸质量分数的提高,试样抗压强度均呈先增大后减小的趋势,硫酸质量分数大于50%后会使得水泥试样抗压强度大幅度降低,水泥试样的抗压强度随着硼废弃物掺量的提高而逐渐降低.
The effects of different preparation processes and different rawmaterial ratios on the compressive strength of sulphur oxygen magnesium cement cured boron waste is studied,to determine the best ratio and provide newideas for the recycling boron waste. The content of boron waste,mass ratio of sulfuric acid to magnesium oxide,water-cement ratio,sulfuric acid concentration and the static effect of setting time on compressive strength were studied. The results showthat when the amount of boron waste blended is 40%,the ratio of sulfuric acid to magnesium oxide is1∶ 2,the water-cement ratio is 0. 5,and the standing time of the slurry prepared by the reaction between boron waste and sulfuric acid is 20 min,the sample has the highest compressive strength.sample with high compressive strength can be prepared to realize the comprehensive utilization of boron waste.
The effects of different preparation processes and different rawmaterial ratios on the compressive strength of sulphur oxygen magnesium cement cured boron waste is studied,to determine the best ratio and provide newideas for the recycling boron waste. The content of boron waste,mass ratio of sulfuric acid to magnesium oxide,water-cement ratio,sulfuric acid concentration and the static effect of setting time on compressive strength were studied. The results showthat when the amount of boron waste blended is 40%,the ratio of sulfuric acid to magnesium oxide is1∶ 2,the water-cement ratio is 0. 5,and the standing time of the slurry prepared by the reaction between boron waste and sulfuric acid is 20 min,the sample has the highest compressive strength.sample with high compressive strength can be prepared to realize the comprehensive utilization of boron waste.
引文
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[15]王磊.硫氧镁水泥改性技术研究[D].重庆:重庆大学,2016.(WANGLei. Study on modification technology of magnesium sulphide magnesium[D].Chongqing:Chongqing University,2016.)
[16]邓德华.提高镁质碱式盐水泥性能的理论与应用研究[D].长沙:中南大学,2005.(DENGDehua. Improve the properties of magnesia-based salt cement theory and application of[D]. Changsha:Central South University,2005.)
[17]王南.硫氧镁水泥材料改性研究[D].鞍山:辽宁科技大学,2016.(WANGNan. Study on modification of magnesium sulphide cement[D]. Anshan:Liaoning University of Science and Technology,2016.)
[2]王海平,肖学英,王继东,等.外加剂对硫氧镁水泥改性作用[J].盐湖研究,2013,21(1):44-49.(WANGHaiping,XIAO Xueying,WANGJidong,et al. Modification of magnesium magnesium sulphate by hydrogen peroxide[J]. Salt lake research,2013,21(1):44-49.)
[3]张玲玲.碱熔融法综合利用硼泥中有价元素的研究[D].沈阳:东北大学,2014.(ZHANGLingling. Alkali fusion method for comprehensive utilization of valuable elements in boron mud[D]. Shenyang:Northeastern University,2014.)
[4]牛迪.利用硼泥合成铁酸镁-镁橄榄石材料的研究[D].鞍山:辽宁科技大学,2016.(NIU Di. Study on the synthesis of magnesium ferrite-forsterite from boron mud[D]. Anshan:Liaoning University of Science and Technology,2016.)
[5]佟钰,刘俊秀,夏枫,等.硼泥的水热固化机理与抗压强度[J].环境工程学报,2015,9(12):6090-6096.(TONGYu,LIU Junxiu,XIA Feng,et al. Hydrothermal curing mechanism and compressive strength of boron mud[J]. Chinese journal of environmental engineering,2015,9(12):6090-6096.)
[6] QIU Z H,FENGJ R,XIAO L,et al. Experimental study of mix proportion of magnesium oxychloride cement[J]. Applied mechanics and materials,2012,188:183-188.
[7] KARIMI Y,MONSHI A. Effect of magnesium chloride concentrations on the properties of magnesium oxychloride cement for nano SiC composite purposes[J]. Ceramics international,2011,37(7):2405-2410.
[8] HE Zhenhui,YANGHongjian,SONGHui,et al. Effect of mixing on properties and microstructure of magnesium oxychloride cement[J]. Journal of the Chinese ceramic society,2016,3(1):38-45.
[9]杨锐.硫氧镁胶凝材料的制备及性能研究[D].上海:上海应用技术学院,2016.(YANGRui. Preparation and properties of magnesium sulphide binder materials[D].Shanghai:Shanghai Institute of Technology,2016.)
[10] LI Y,LI Z,PEI H,et al. The influence of FeSO4and KH2PO4on the performance of magnesium oxychloride cement[J]. Construction and building materials,2016,102(1):233-238.
[11] LI Y,YU H,ZHENGL,et al. Compressive strength of fly ash magnesium oxychloride cement containing granite wastes[J]. Construction and building materials,2013,38(1):1-7.
[12] WEN X D,XIE D D,YI Y,et al. Effect of desulfurization ash with different calcium sulfite content on performance of cement based materials[J]. Advanced materials research,2011,250/253:1054-1057.
[13]鲁利梅.硫酸镁为原料制备氢氧化镁和碱式硫酸镁晶须的研究[D].天津:河北工业大学,2015.(LU Limei. Magnesium sulfate as rawmaterials for the preparation of magnesium hydroxide and magnesium sulfate whisker[D]. Tianjin:Hebei University of Technology,2015.)
[14] RASHAD A M,SELEEMH. A study on high strength concrete with moderate cement content incorporating limestone powder[J]. Building research journal,2014,61(1):43-58.
[15]王磊.硫氧镁水泥改性技术研究[D].重庆:重庆大学,2016.(WANGLei. Study on modification technology of magnesium sulphide magnesium[D].Chongqing:Chongqing University,2016.)
[16]邓德华.提高镁质碱式盐水泥性能的理论与应用研究[D].长沙:中南大学,2005.(DENGDehua. Improve the properties of magnesia-based salt cement theory and application of[D]. Changsha:Central South University,2005.)
[17]王南.硫氧镁水泥材料改性研究[D].鞍山:辽宁科技大学,2016.(WANGNan. Study on modification of magnesium sulphide cement[D]. Anshan:Liaoning University of Science and Technology,2016.)