泡沫铝-钢纤维混凝土静态压缩性能试验研究

为研究静态荷载作用下的泡沫铝-钢纤维混凝土复合结构抗压性能,利用万能试验机分别对泡沫铝孔径为3~6 mm、6~9 mm、9~12 mm,钢纤维掺量(体积分数)为0%、0.5%、1.0%、1.5%的泡沫铝-钢纤维混凝土复合层试件进行压缩性能试验和拌合物性能分析,根据试验数据分析泡沫铝的孔径效应对泡沫铝-钢纤维混凝土复合结构压缩性能的影响规律。结果表明:钢纤维混凝土立方体抗压强度随着钢纤维掺量的增加逐渐增大,当钢纤维掺量为1.5%时,与素混凝土相比,其立方体抗压强度约提高22.6%;泡沫铝-钢纤维混凝土复合结构抗压强度相比较钢纤维混凝土提高约5.3%~8.2%,并且泡沫铝-钢纤维混凝土复合结构的静态压缩应力-应变曲线上会出现一段平台区,且平台区会随着泡沫铝孔径的增加而逐渐变长。

Experimental Study on Static Compressive Properties of Aluminum Foam-Steel Fiber Concrete

In order to study the compressive properties of aluminum foam-steel fiber concrete composite layer under static load, the universal testing machine was used to test the pore size of aluminum foams of 3 mm to 6 mm, 6 mm to 9 mm, 9 mm to 12 mm. The compressive properties test was carried out on the aluminum foam-steel fiber concrete composite layer specimens with steel fiber content (volume fraction) of 0%, 0.5%, 1.0% and 1.5%, and the mixture properties were analyzed. Based on different pore sizes of aluminum foam and according to the test data, the influence of aluminum foam on the compressive resistance of the aluminum foam-steel fiber reinforced concrete composite layer specimens was analyzed, and the rules were summarized. The results show that when the steel fiber content is 1.5%, the compressive strength of the steel fiber concrete cube increases by 22.6%, positive correlation between them. The compressive strength of foam aluminum wire reinforced concrete composite layer is about 5.3% to 8.2% higher than the steel fiber concrete, and the static compressive stress-strain curves of the aluminum foam-steel fiber concrete composite layer have a platform area, and the platform area gradually becomes longer with the increase of the aperture of the aluminum foamed.