| 摘要 |
<p>PURPOSE: A high strength fire resistant concrete containing polyamide fiber is provided to increase the workability of hardening concrete by uniformly dispersing polyamide fiber in the concrete based on a dispersing agent. CONSTITUTION: A high strength fire resistant concrete includes 600-700 kg of cement, 130-180 kg of water, 260-420 kg of admixture, 900-1100 kg of fine aggregate, 350-500 kg of coarse aggregate, and 2.0-3.5 kg of polyamide fiber per unit volume. The design strength of the concrete is between 150 and 200 MPa. The admixture includes 90-140 kg/m^3 of silica fume, 140-200 kg/m^3 of slag fine powder, 30-80 kg/m^3 of anhydrous gypsum. The external surface of the polyamide fiber is coated with a dispersing agent. The dispersing agent includes a poly-atomic alcohol ester lubricant, a nonionic surfactant, and an antistatic agent.</p> |
