环氧树脂掺量对发光树脂透水混凝土性能的影响

选择环氧树脂E51作为改性填料，制备出一系列不同树脂质量分数（0%、2%、4%和6%）的发光树脂透水混凝土。环氧树脂的引入使发光树脂透水混凝土的抗压强度和抗折强度均得到了提高，且随着树脂掺量的增加呈现出先升高后降低的趋势，在树脂质量分数为4%时，抗压强度和抗折强度均达到最大值21.7和6.11 MPa，发光树脂透水混凝土的透水系数随着环氧树脂质量分数的增加呈现出先降低后升高的趋势，在4%时透水系数最低为5.1 mm/s。微观形貌分析发现未经改性的环氧树脂透水混凝土的断面处有明显的裂痕和气孔，整体结构较为疏松，在引入环氧树脂后，裂痕和气孔的数量明显减少，整体结合较为紧密，发光树脂透水混凝土的发光时间与树脂质量分数关系不大，且发光透水混凝土在光照1 h下可以保持超过5 h的较为高效的发光时间。

Effect of Epoxy Resin Content on the Performance of Luminous Resin Permeable Concrete

Epoxy resin E51 is selected as the modified filler to prepare a series of luminous resin water-permeable concretes with different resin mass fraction （0%， 2%， 4%， 6%）. The introduction of epoxy resin improves the compressive strength and flexural strength of luminous resin permeable concrete， and with the increase of the resin content， it shows a trend of increasing followed by decreasing. When the resin content is 4%， the compressive strength and flexural strength both reach the maximum values of 21.7 MPa and 6.11 MPa. The water permeability coefficient of luminescent resin permeable concrete shows a trend of decreasing followed by increasing with the increase of epoxy resin content. The lowest water permeability coefficient is 5.1 mm/s at 4%. The microscopic morphology analysis reveals that the cross-section of the unmodified epoxy resin permeable concrete has obvious cracks and pores， and the overall structure is relatively loose. After the introduction of epoxy resin， the number of cracks and pores is significantly reduced， and the overall integration is tighter. The luminescence time of the luminescent resin permeable concrete has little relationship with the resin content， and the luminescent permeable concrete can maintain a more efficient luminescence time of more than 5 h under 1 h of light.