装配式建筑灌浆材料的研究

发布时间：2018-03-05 09:53

本文选题：水泥基灌浆材料　切入点：水胶比　出处：《沈阳建筑大学》2013年硕士论文　论文类型：学位论文

【摘要】：随着建筑产业化的发展,装配式建筑已成为当今社会建筑发展的必然趋势。装配整体式建筑用灌浆料所构成的是预制构件间的关键节点,是力学强度、尺寸匹配、耐久性等要求最为苛刻的部位,也因此对灌浆料的性能提出了更高要求。传统灌浆材料应用于装配式建筑中暴露出诸多问题,因此研制高性能灌浆材料是实现建筑产业化的重要措施之一。一直以来,研究者们对不同种类的灌浆材料进行了深入的研究,包括化学灌浆材料和非化学灌浆材料,对其优缺点进行了分析,发现应用最为广泛的是水泥基灌浆材料,该类灌浆材料在环保和经济效益上具有无毒无害、价格低廉等优点,被称为绿色建材；在性能上具有高流动性、高强度、高稳定性、不泌水等优点。目前,关于水泥基灌浆材料的研究很多,主要是针对应用于二次灌浆、地脚螺栓的锚固、高铁支座等领域,而对用于装配式建筑水泥基灌浆材料的研究甚少。本文通过设计合理的配合比,将水胶比、减水剂、缓凝剂等对灌浆材料工作性、强度的影响进行分析与讨论。本文对水泥基灌浆料工作性、强度及膨胀性进行测试,分析与探讨最大砂粒径、.胶‘砂比、矿物掺合料掺量对水泥基灌浆料性能的影响。实验测得最大砂粒径由1.25mm增大到2.36mm,工作性与强度均有所提高；胶砂比从1：1增加到1：1.5,流动度有减小的趋势；粉煤灰与硅灰取代水泥总掺量为13%,粉煤灰由3%增加到10%,当硅灰掺量为5%,粉煤灰掺量为8%时,体系质量最大,密卖状态最佳。实验结果表明,最大砂粒径选择2.36mm,胶砂比1：1,硅灰掺量5%、粉煤灰掺量8%时,工作性与强度符合应用于装配式建筑对灌浆料的性能要求。本文对水泥基灌浆料的工作性进行测定,分析与探讨水胶比、水泥种类、减水剂种类及掺量、缓凝剂掺量对水泥基灌浆料工作性的影响。实验测得在初始流动度不小于300mm的情况下,普硅水泥基灌浆料水胶比可降至0.24,硫铝水泥基灌浆料水胶比可降至0.21；采用聚羧酸高效减水剂、最佳掺入量保持在0.5%,初始流动度325mm,30min后310mm；采用四硼酸钠缓凝剂、最佳掺入量保持在0.2%,初始流动度325mm,30min后流动度310mm。实验结果得出,硫铝水泥与普硅水泥基灌浆料的工作性,结果相差较大,说明水泥物理化学性质对减水剂的适应性产生较大影响；在保证符合要求的工作性前提下降低水胶比,掺入聚羧酸减水剂0.5%、四硼酸钠0.2%是可取的。本文对水泥基灌浆料的强度进行测定,分析与探讨水胶比、聚羧酸高效减水剂掺量、硫铝水泥与普硅水泥复配对灌浆材料强度的影响。实验测得42.5R硫铝水泥基灌浆料水胶比降至0.21、聚羧酸高效减水剂掺量0.5%时,1d强度72MPa,3d强度80MPa,28d强度108MPa；硫铝水泥基灌浆料的强度随着聚羧酸高效减水剂掺量的增大而增大,当掺量增大到0.6%时,1d强度68MPa,3d强度77MPa,28d强度106MPa；42.5R硫铝水泥复配10%42.5普硅水泥基灌浆料,1d强度56MPa,3d强度66MPa,28d强度89MPa。实验结果表明：水胶比越大,水泥基灌浆材料的强度越低；适当增加聚羧酸高效减水剂掺量可提高强度,掺量过大对早期强度不利；硫铝水泥复配10%普通硅酸盐水泥对灌浆材料强度不利。本文对最佳配合比的硫铝水泥基灌浆料进行了膨胀性测试,实验测得硫铝水泥基灌浆料2h膨胀率0.018%、24h膨胀率0.046%。实验结果表明：以此配合比制备高工作性、高强度的硫铝水泥基灌浆料的膨胀性符合国家标准。
[Abstract]:With the development of the construction industry, building has become an inevitable trend of social development. The construction of prefabricated construction with grouting material is composed of key nodes between prefabricated components, mechanical strength, size matching, the most demanding part for durability requirements, and therefore on the performance of grouting material is put forward high requirements. The traditional grouting material used in prefabricated buildings exposed many problems, so the development of high performance grouting material is one of the important measures to realize the construction industry. Since, the researchers conducted in-depth research on the grouting materials of different kinds, including chemical grouting materials and non chemical grouting material, the the advantages and disadvantages are analyzed, that is the most widely used cement grouting material, the grouting material is non-toxic and harmless in the environmental and economic benefits, low price, is called Green building materials; high liquidity, the performance of high strength, high stability, no bleeding and other advantages. At present, many researches on cement based grouting materials, mainly for the application in the two grouting, anchor bolt, high iron bearing and other fields, and for research on prefabricated construction of cement grouting material very little. Through the rational design of the mix ratio, the ratio of water reducing agent, water cement retarder on the grouting material work, analyzed and discussed the influence of strength.
The work of filling slurry on the cement, strength and swelling test, analysis and discussion of the maximum particle size, sand ratio, glue. "Effects of mineral admixtures on the properties of cement grout material. The measured maximum particle size increased from 1.25mm to 2.36mm, workability and strength are improved; cement sand ratio increased from 1:1 to 1:1.5, decreased fluidity; fly ash and silica fume to replace the total cement content is 13%, the fly ash increased from 3% to 10%, when silica fume was 5%, the amount of fly ash is 8%, the maximum system quality, dense sell best. The experimental results show that the maximum particle size 2.36mm, cement sand ratio 1:1, silica fume 5%, fly ash 8%, workability and strength meets the requirements of performance in the prefabricated construction of grouting material.
The determination of the cement based grouting material, analysis and discussion of the water cement ratio, cement type, type and dosage of water reducer, retarder dosage effects of pouring slurry of cement work. The measured in the initial fluidity of not less than 300mm under the condition of ordinary portland cement based grouting material of water the glue ratio fell to 0.24, sulfur aluminum cement grouting materials water cement ratio may be reduced to 0.21; using polycarboxylate superplasticizer, the optimum amount of remained at 0.5%, the initial fluidity of 325mm, 30min after 310mm; retarder with four sodium borate, the optimum amount of remained at 0.2%, the initial flow of 325mm, 30min the experimental results show that the fluidity of 310mm., the work of sulfur aluminum cement and ordinary portland cement based grouting material, the results were different, that influence the adaptability of physical and chemical properties of cement with superplasticizer; in compliance with the requirements of the premise work with lower water cement ratio, mixing The polycarboxylic acid water reducer 0.5% and four sodium borate 0.2% are advisable.
In this paper, the strength of cement based grouting material were determined. The analysis and discussion of water binder ratio, polycarboxylate superplasticizer dosage, effect of sulfur aluminum cement and ordinary portland cement mixture on the strength of grouting material. The measured 42.5R sulfur aluminum cement based grouting material water cement ratio to 0.21 polycarboxylate superplasticizer admixture 0.5%, the strength of 1D 72MPa, 3D 80MPa 28d 108MPa strength, strength; sulphoaluminate cement based grouting material strength increases with the increase of polycarboxylate superplasticizer content, when the content increases to 0.6%, the strength of 1D 68MPa, 3D 77MPa 28d 106MPa strength, 42.5R strength; sulfur aluminum cement compound silicon 10%42.5 P cement based grouting material, the strength of 1D 56MPa, 3D strength 66MPa, experimental results show that the strength of 28d 89MPa. increasing of water cement ratio of cement grouting material, the strength is low; the increase of polycarboxylate superplasticizer is appropriate can improve the intensity, volume is too large for the early strength of aluminum sulfur is unfavorable; The cement compound 10% ordinary portland cement is bad to the strength of the grouting material.
The best fit of sulfur aluminium cement based grouting material ratio of swelling test, to sulphoaluminate cement based grouting material 2H 0.018% expansion rate test, expansion rate 24h 0.046%. experimental results show that this preparation with high working ratio, sulfur aluminum cement based high strength grouting material expansion in line with national standards.

【学位授予单位】：沈阳建筑大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU528

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