The invention discloses a test method for
bonding strength of chopped ultrafine organic
fiber and a
cement-based composite interface. The method comprises steps as follows:
fiber is bonded on a sample loading cuboid, and a part of the lower end of the
fiber is exposed; a mold is prepared, uniformly stirred
cement-based materials are poured into the mold and compacted, the surface is flattened, and a
cement matrix is obtained; the exposed end of the fiber is perpendicularly inserted into the cement matrix; after the cement matrix is cured to a test age, the sample loading cuboid is removed, and a free end of the fiber is exposed; an instant
adhesive is bonded to the free end of the fiber and is congealed to form small balls; the fiber is tested on a monofilament stretching
machine, the stretching speed is controlled, the fiber is pulled out of the cement matrix, and a
load displacement curve is obtained; the
bonding strength of the fiber and the cement-based composite interface is calculated. The exposed length of the fiber is controlled in advance, and the embedded length of the fiber in the cement matrix can be controlled precisely; requirements for the length and the
diameter of the fiber are low, and the test method can be used for testing longer and thinner fiber; a tested sample is not required to be
cut, and the testing result is more accurate.