Conductive super high ductility cement-based composite material and preparation method thereof
A composite material and cement-based technology, which is applied in the field of construction engineering, can solve the problems of cracking of main cracks, reducing the continuity and stability of the conductivity of cement-based materials, etc., to achieve strong power-on and heating capabilities, continuous and stable conductive network connection reliability, Effect of improving electrical conductivity and crack control ability
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Embodiment 1
[0040] This implementation example is used to test the uniaxial tensile properties of the prepared conductive ultra-high ductility cement-based composite material, and includes the following components in parts by weight:
[0041]
[0042]
[0043] It also includes polyethylene fibers with a volume content of 1.5% and carbon fibers with a volume content of 0.5%.
[0044] The cement is ordinary Portland cement or composite Portland cement, its 28-day compressive strength ≥ 52.5MPa, 28-day flexural strength ≥ 7.0MPa, specific surface area ≥ 300m 2 / kg.
[0045] Fly ash is a first-class fly ash with a specific surface area ≥ 700m 2 / kg, the density is 2.6g / cm 3 .
[0046] Quartz sand is superfine quartz sand, its specifications are 70-110 mesh, and the particle size is 0.1-0.15mm.
[0047] The particle size of the nano conductive carbon powder is 9-20nm, and the resistivity is 0.5-1.0Ω·m.
[0048] The length of the polyethylene fiber is 6mm-12mm, the diameter is 12-39μ...
Embodiment 2
[0055] This implementation example is used to test the uniaxial tensile properties of the prepared conductive ultra-high ductility cement-based composite material, and includes the following components in parts by weight:
[0056]
[0057] Also included are polyethylene fibers at a volume content of 1.7% and carbon fibers at a volume content of 0.8%.
[0058] The cement is ordinary Portland cement or composite Portland cement, its 28-day compressive strength ≥ 52.5MPa, 28-day flexural strength ≥ 7.0MPa, specific surface area ≥ 300m 2 / kg.
[0059] Fly ash is a first-class fly ash with a specific surface area ≥ 700m 2 / kg, the density is 2.6g / cm 3 .
[0060] Quartz sand is superfine quartz sand, its specifications are 70-110 mesh, and the particle size is 0.1-0.15mm.
[0061] The particle size of the nano conductive carbon powder is 9-20nm, and the resistivity is 0.5-1.0Ω·m.
[0062] The length of the polyethylene fiber is 6mm-12mm, the diameter is 12-39μm, the elastic ...
Embodiment 3
[0069] This implementation example is used to test the uniaxial tensile properties of the prepared conductive ultra-high ductility cement-based composite material, and includes the following components in parts by weight:
[0070]
[0071] It also includes 2% polyethylene fiber by volume and 1% carbon fiber by volume.
[0072] The cement is ordinary Portland cement or composite Portland cement, its 28-day compressive strength ≥ 52.5MPa, 28-day flexural strength ≥ 7.0MPa, specific surface area ≥ 300m 2 / kg.
[0073] Fly ash is a first-class fly ash with a specific surface area ≥ 700m 2 / kg, the density is 2.6g / cm 3 .
[0074] Quartz sand is superfine quartz sand, its specifications are 70-110 mesh, and the particle size is 0.1-0.15mm. The particle size of the nano conductive carbon powder is 9-20nm, and the resistivity is 0.5-1.0Ω·m.
[0075] The length of the polyethylene fiber is 6mm-12mm, the diameter is 12-39μm, the elastic modulus is ≥100GPa, the ultimate tensile s...
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