含水率对再生混凝抗压强度影响研究

为了研究不同含水率状态下富含砖粒再生混凝土的抗压性能,制作了72块强度等级分别为RC20、RC25、RC30富含砖粒再生混凝土立方体试块标准养护28d后将其移入干燥箱中进行干燥处理。将干燥后的立方体试块分别放入清水中浸泡4、12、24、48、72、168、336 h后测量其含水率,并进行单轴抗压力学性能试验。建立再生混凝土强度随其含水率变化的计算模型。研究结果表明:富含砖粒再生混凝土抗压强度随含水率增加而降低,对RC20、RC25、RC30来说,饱和富含砖粒再生混凝土的立方体抗压强度较干燥状态分别降低了33.3%、16.9%、36.9%。

Effect of Water Content on Compressive Strength of Recycled Concrete

In order to study the compressive properties of brick-enriched recycled concrete at different water content rates, 72 blocks of RC20, RC25, RC30 enriched with brick recycled concrete cube standard maintenance 28d were transferred to the drying box for drying. treatment. The dried cube blocks were soaked in clear water 4h, 12h, 24h, 48h, 72h, 168h, and 336h respectively, and their moisture content was measured and the uniaxial pressure resistance mechanical properties were tested. The influence of water content on the compressive strength of recycled concrete was studied by experiment. The results show that the compressive strength of brick-rich recycled concrete decreases with increasing moisture content. For RC20, RC25 and RC30, the compressive strength of saturated brickrich recycled concrete cube decreases by 33.3%, 16.9%, and 36.9% respectively.