【摘要】：本論文針對公路混凝土，圍繞鋼渣粉，研究了將鋼渣粉和礦渣粉用于混凝土來增強公路混凝土的韌性。本文在對鋼渣、礦渣原料的細度、化學組成、礦物組成、微觀結構等基本指標進行測定基礎上，從公路混凝土路面對材料韌性、耐磨性的性能的要求出發(fā)，，通過混凝土的基本組成材料的優(yōu)化組合，合理選擇水泥熟料、混合材、摻合料、配合比等，研究了鋼渣粉單摻、礦渣粉單摻、復摻對水泥水化性能及水化產(chǎn)物微觀結構、孔隙率的影響；研究鋼渣粉、礦渣粉單摻、復摻對水泥及混凝土的物理性能、力學性能的影響，探尋提高混凝土韌性的優(yōu)化組合方案。 本論文研究了鋼渣粉、礦渣粉的單摻、復摻對水泥膠砂強度的影響，研究表明：在本文條件下，鋼渣粉和礦渣粉等量取代40%水泥熟料且兩者的質量比為3：7時，鋼渣粉和礦渣粉的復合摻加能夠很好的提高水泥膠砂的強度，增強水泥膠砂的耐磨性。 本文研究了鋼渣粉、礦渣粉的單摻、復摻對水泥混凝土力學性能的影響，研究表明：鋼渣粉和礦渣粉的雙摻提高了水泥混凝土的抗壓強度、抗彎拉強度和劈裂強度，在利用廢料的同時增強了公路水泥混凝土所要求的物理力學指標，尤其是抗彎拉強度的增加。同時對雙摻鋼渣粉礦渣粉的水泥混凝土進行了彎曲韌性試驗，并與鋼纖維混凝土做了比較，研究表明：鋼渣粉礦渣粉的雙摻能夠有效提高混凝土的韌性，雖然其增韌效果不如鋼纖維，但與空白組相比效果顯著。 本文對鋼渣粉、礦渣粉單摻或復摻的膠凝材料水化產(chǎn)物進行了微觀結構研究。研究表明：鋼渣粉礦渣粉的不同摻加均能夠改善水化物的水化和孔徑分布。其中，礦渣粉單摻的效果最為明顯，它能夠明顯降低水化物中的微孔數(shù)量；鋼渣粉礦渣粉的復摻也能夠改善水化物的孔徑分布，但效果沒有單摻礦渣粉明顯；當單摻鋼渣粉時水化物孔徑分布改變最為不明顯。特別強調的是，雖然不同鋼渣粉礦渣粉的摻入對水化物孔徑分布改變有所差異，但總體來看都有所改善，而且鋼渣粉礦渣粉的摻入都能有效降低水化物中的不良孔徑（50nm）。
[Abstract]:In this paper, steel slag powder and slag powder are used to strengthen the toughness of highway concrete. On the basis of measuring the fineness, chemical composition, mineral composition and microstructure of steel slag and slag raw materials, this paper starts from the requirements of material toughness and wear resistance of highway concrete pavement. Through the optimization and combination of the basic components of concrete and the reasonable selection of cement clinker, mixture, admixture and mix ratio, the hydration properties and microstructure of hydration products of steel slag powder, slag powder and slag powder were studied. The influence of steel slag powder and slag powder on the physical and mechanical properties of cement and concrete was studied. In this paper, the influence of steel slag powder and slag powder on the strength of cement mortar is studied. The results show that the steel slag powder and slag powder replace 40% cement clinker in equal quantity under the condition of this paper, and the mass ratio of the two is 3:7. The addition of steel slag powder and slag powder can improve the strength of cement sand and enhance the wear resistance of cement sand. In this paper, the influence of steel slag powder and slag powder on the mechanical properties of cement concrete is studied. The results show that the compressive strength, flexural tensile strength and splitting strength of cement concrete are improved by the addition of steel slag powder and slag powder. At the same time, the physical and mechanical indexes of highway cement concrete are strengthened, especially the flexural tensile strength. At the same time, the flexural toughness test of cement concrete mixed with steel slag powder is carried out and compared with steel fiber concrete. The results show that the double mixing of steel slag powder can effectively improve the toughness of concrete. Although its toughening effect is not as good as steel fiber, it is more effective than blank group. The microstructures of hydration products of steel slag powder and slag powder were studied. The results show that the hydration and pore size distribution of hydrates can be improved by different addition of slag powder. Among them, the effect of single addition of slag powder is the most obvious, it can obviously reduce the number of micropores in hydrates, the co-mixing of slag powder of steel slag powder can also improve the pore size distribution of hydrates, but the effect is not as obvious as that of slag powder alone. When steel slag powder is added, the pore size distribution of hydrates is the least obvious. It is especially emphasized that although the addition of different steel slag powder has different influence on the pore size distribution of hydrates, it has been improved in general, and the addition of steel slag powder can effectively reduce the bad pore size (50nm) in hydrates.
【學位授予單位】：河南工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U414

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