钢渣粉用作混凝土掺合料的研究

发布时间：2018-03-16 20:01

本文选题：钢渣粉　切入点：钢渣混凝土　出处：《华侨大学》2013年硕士论文　论文类型：学位论文

【摘要】：本文在了解三钢钢渣的组成、结构与物理化学性能关系的基础上（各地钢渣的品种、性能是有差异的），探讨其与胶凝性能的关系。采用均匀设计法，安排试验方案，能减少试验次数。探讨了不同比例钢渣掺量混凝土的工作性能、力学性能；在进行大量试验的基础上，，对不同掺量钢渣混凝土的坍落度、抗压强度、抗氯离子渗透性能、抗酸碱盐侵蚀性能、抗冻融性及抗碳化性等进行了全面分析。本文工作性能试验研究表明：钢渣具有活性，用钢渣粉取代20%~45%水泥能配制C30以上的混凝土。水灰比、砂率的增大能改善拌合物的工作性能；钢渣掺量的增大虽不能显著的改善混凝土的工作性能，但不同钢渣掺量对拌合物工作性能的影响较小。本文强度试验表明：20%~45%钢渣掺量时，水灰比减小、砂率的增大均能提高混凝土抗压强度；钢渣掺量的增大对混凝土早期强度不利，而钢渣混凝土的后期强度增长率高于普通混凝土。然而，钢渣掺量过高会降低对钢渣活性的激发能力，钢渣粉掺量控制在25%对混凝土长期强度发展是有利的。本文研究了利用钢渣粉配制C30以上混凝土的耐久性能。数据结果表明：掺入25%钢渣粉能提高混凝土的抗氯离子渗透性能，抗酸碱盐能力较强。采用快速冻融法、快速碳化法测试了混凝土的抗冻性能和抗碳化性能，试验表明：掺25%钢渣混凝上的抗冻性能略高于普通混凝土；钢渣掺量基本不影响混凝土的抗碳化能力，抗碳化能力较高。
[Abstract]:Based on the understanding of the relationship between the composition of steel slag steel, based on the physical and chemical properties of the structure (around the steel slag performance varieties, there is a difference), and explore their relationship with cementitious properties. Using the uniform design method to design the experiments, can reduce the number of tests. The working performance of different proportion of steel slag concrete to investigate the mechanical properties; based on lots of experiments on different steel slag concrete slump, compressive strength, chloride penetration resistance, acid and alkali and salt corrosion, freeze-thaw resistance and carbonization resistance etc. were analyzed.
This paper showed that the working performance of steel slag has the activity of steel slag powder instead of 20%~45% cement to prepare more than C30. The concrete water cement ratio, sand ratio increases performance can improve the mixture; steel slag increases significantly improve concrete performance although not, but has little effect on the work of different steel slag workability.
This paper shows that the strength test of 20%~45% steel slag, water cement ratio decreases, increasing sand ratio can improve the compressive strength of concrete; steel slag increases against the early strength of concrete, while the growth rate of the late strength of steel slag concrete than ordinary concrete. However, steel slag is too high will reduce the ability to stimulate the activity of steel slag the dosage of steel slag, 25% in the control of concrete long-term strength development.
This paper studies the durability of concrete with steel slag powder prepared above C30. Results show that: to improve the performance of concrete against chloride penetration can be mixed with 25% slag, acid and alkali resistant salt ability. By rapid freeze-thaw method, rapid carbonation test of concrete frost resistance and carbonation resistance test showed that the addition of 25% the frost resistance of the steel slag mixed coagulation is slightly higher than the ordinary concrete; steel slag without affecting the carbonation resistance of concrete, high anti carbonation ability.

【学位授予单位】：华侨大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU528

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