| abstract |
PROBLEM TO BE SOLVED: To uniformly disperse elongated fibers having poor dispersibility in mortar or concrete by appropriately setting a step of kneading cement, water, sand and fibers. SOLUTION: When kneading a fiber-containing mortar / concrete, first, cement and water are stirred in a state where a water-cement ratio is 20% to 30%, and thereafter, fibers are added and stirred. Next, sand is added to the kneaded material and stirred until the material is homogeneously mixed, and then chemically mixed with the remaining water so that the final water-cement ratio (W / C) is 25% to 60%. And the fluidity was adjusted. |