Experimental Study Of Flexural Behavior Of Fiberreinforced Airgel Insulation Board-reinforced Concrete Beam

In this paper, 12 reinforced concrete beams were tested comparative study, the main contents include:(1) Ordinary reinforced concrete reinforcement ratio of two different beams were studied, As posted outside the two plates and pour the entire central fiber reinforced airgel insulation sheet reference beam reinforced concrete beam.(2) For four externally bonded fiber reinforced airgel insulation board test beams were studied, Verify that the plane section assumption. Rate of 0.421% for the reinforcement of the test beam, Paste and Paste 5mm thickness of 15 mm thickness of the beam cracking load test were increased by 17.7%, 26.6%, Ultimate load were increased by 11.9%, 15.1%. Rate of 0.942% for the reinforcement of the test beam, Paste and Paste 5mm thickness of 15 mm thickness of the beam cracking load test were increased by 11.1%, 22.2%, Ultimate load were increased by 9.1%, 11.4%.(3) Central entire cast for four fiber-reinforced airgel insulation board test beams were studied, Verify that the plane section assumption. For non plus lumbar muscle in the middle entire thickness of 5mm and 15 mm poured fiber-reinforced airgel insulation board had no influence on the test beam cracking load and ultimate load. 5mm and 15 mm for fiber-reinforced airgel insulation board almost no effect on the cracking load test beam thickness for the entire cast of the middle plus lumbar muscle, But four back ribs for fixing fiber reinforced airgel insulation boards have among the lower two are located in the beam, Equivalent force tendon, It can improve the ultimate load test beams, Increased by about 19.4%.(4) For 2 EPS polystyrene board posted outside the reinforced concrete beam test pilot study, Verify its plane section assumption. Posted outside of 20 mm EPS polystyrene board for reinforcement was 0.421% of the test beams cracking load and ultimate load increase rate were 17.7% and 8.7%; Rate of 0.942% for the reinforcement of the test beams cracking load and ultimate load increase rate were 11.1% and 6.8%.