Inorganic silicon impermeable self-repair waterproof cement-based grouting material, preparation technology and construction method thereof

The invention discloses an inorganic silicon impermeable self-repair waterproof cement-based grouting material, a preparation technology and a construction method thereof. The invention is characterized in that: by weight percentage, the grouting material comprises the following raw materials: 50%-70% of a gelling component, 6%-18% of an obsidian active component, 16%-26% of ultrafine quartz sand,3.5%-5% of gypsum, 1%-8% of a toughening agent and 1%-2.5% of a retardant water reducer. Specifically, the active components wrapped by obsidian are located in the nano-cavities of obsidian. The inorganic silicon impermeable self-repair waterproof cement-based grouting material provided by the invention solves the problems that grouting materials cannot repair the micro-cracks of the structure itself and undergo aging, solves the problems of reinforcement and water resistance and leaking stoppage after grouting between the back of an underground engineering structure and a surrounding rock, can secondary achieve infi