Method for measuring stressed deformation of cement-base composite material
A composite material and detection method technology, applied in the direction of material resistance, using stable tension/pressure to test material strength, etc., can solve problems such as uneven shrinkage cracks, and achieve the effect of good adhesion
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[0093] Embodiment 1: 1, sample preparation
[0094] 1), polypropylene fine denier short fiber reinforced cement mortar
[0095] Ratio: cement: standard sand: water = 1:2.5:0.44
[0096] Dosage of polypropylene fine denier short fibers:
[0097] Polypropylene fine denier short fiber: cement mortar = 1:1000 (volume ratio)
[0098] Stirring time: cement + fiber 1.5min
[0099] Cement + fiber + standard sand + water 3min
[0100] Vibration time; 2min
[0101] The standard curing time is 24 hours, demoulding, and natural curing for 28 days.
[0102] 2), the surface of the sample is coated with a conductive film
[0103] After the cement mortar and the polypropylene fine-denier short-fiber-reinforced cement mortar are naturally cured to age, the surface of the sample is treated with conductive adhesive to form a conductive film sensor, as shown in Figure (8). Figure (8) is a schematic diagram of a mortar sample coated with a conductive film on the surface.
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