求翻译：而大比例的单掺粉煤灰和单掺矿渣可以通过火山灰效应生成水化硅酸钙凝胶沉积在界面的空隙内，提高了混凝土的粘结强度和抗渗性。同时活性矿物细掺料细微颗粒均匀分散到水泥浆体中，填充水泥石孔隙，改善了混凝土的空结构，也提高了混凝土的抗渗性，另外，粉煤灰与矿渣粉等量代替了部分水泥，降低了大体积海工混凝土的初期水化热，减少了温度及其它微裂缝，进而减少了氯离子的渗透孔路，最终达到提高海工混凝土的抗氯离子渗透性能的效果。与硅灰相比，粉煤灰和矿渣对混凝土抗氯离子渗透效果更显著，且成本更低，应用更加广泛。是什么意思？

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