▎ 摘　　要

NOVELTY - Self-healing cement-based material comprises 15-25 g microcapsule and 0.75-1.25 g graphene oxide, which are added to every 1000 g concrete mortar, where the concrete mortar comprises 23 wt.% cement, 67 wt.% sand and 10 wt.% water. USE - Self-healing cement-based material. ADVANTAGE - The method solves basic long-term service characteristics and grounding resistance problems faced by power transmission and transformation projects in special environment of northwest region, improves overall bearing capacity, stiffness, grounding capacity, crack resistance and service performance of concrete, and saves cost and material usage. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) A method for preparing the cement-based material, involving (a) preparing a core material, (b) preparing a wall material solution, (c) preparing microcapsule, (d) carrying out integrity detection of the outer wall of the microcapsule, (e) preparing graphene oxide, and (f) preparing a self-healing cement-based material test block; and (2) A method for testing the self-healing cement-based materials, involving (1) carrying out pressure preloading on the self-healing cement-based material test block for not less than3 minutes, (2) immersing the test block in water for 30 days, (3) observing the microcapsule morphology, crack repair and composition of the microcapsule in the test block obtained in step (2), (4) evenly arranging four stainless steel electrodes on the test block, (5) applying direct current power to the stainless steel electrode to obtain voltage and current in the line, and (6) verifying the strength growth rate and self-healing rate of the test block, so that its strength is increased by more than 10% compared with ordinary concrete, and its self-healing rate reaches more than 90%, and indicating that the test block is qualified, otherwise the test block is unqualified.