Wei Hui, Liu Yang, Wu Tao, Liu Xi
School of Civil Engineering, Chang'an University, Xi'an 710061, China.
Materials (Basel). 2020 Mar 13;13(6):1314. doi: 10.3390/ma13061314.
Effects of aggregate size on the mechanical properties of lightweight concrete (LC) were investigated. Four gradings of lightweight aggregate (LWA) were designed and used to prepare the specimens for compressive strength, splitting tensile strength, and flexural strength tests. An estimating method for compressive strength of LC was then established. The compressive strength of tested LC was up to 95 MPa at 90-day curing time. The test results suggested that the absence of medium-size particles decreased the compaction of LC, therefore the density and compressive strength were negatively affected. Specimens having single size of aggregate showed lower splitting tensile and flexural strengths than that having three sizes of LWA. The parameters of the estimating model were determined according to the test results, and the compressive strength predictions of estimation model were compared with the results from other literature.
研究了集料尺寸对轻集料混凝土（LC）力学性能的影响。设计了四种轻集料（LWA）级配，并用于制备抗压强度、劈裂抗拉强度和抗弯强度试验的试件。然后建立了轻集料混凝土抗压强度的估算方法。在养护90天时，试验轻集料混凝土的抗压强度高达95MPa。试验结果表明，缺少中等尺寸颗粒会降低轻集料混凝土的压实度，因此对密度和抗压强度产生负面影响。单一尺寸集料的试件的劈裂抗拉强度和抗弯强度低于具有三种尺寸轻集料的试件。根据试验结果确定了估算模型的参数，并将估算模型的抗压强度预测结果与其他文献的结果进行了比较。
