Despite the great use of concrete, tensile strength and low flexibility and brittleness are its weaknesses. Many solutions have been provided to eliminate the mentioned defects. In order to increase the flexibility of concrete in previous studies, crushed rubber tire particles have been added to concrete. Recycling car tires helps the environment and makes concrete much more flexible than regular concrete. In this research, silicone rubber has been replaced by 0%, 2%, 4%, 8%, 12.5%, 25%, and 50% of mineral aggregates. This rubber was initially in liquid form, which, after mixing with ordinary concrete, dispersed into the concrete texture and formed a uniform mixture, and this liquid rubber became a flexible solid after 24 hours. Concrete containing silicone rubber is a new composite with new properties, and in this research, it is called Hybrid Silicone Rubber Concrete (HSRC). Also, to evaluate the effect of aggregate size in making experimental specimens, two coarse to fine aggregate ratios of G/S = 0.7, 1.1 were considered. Flexural strength tests were performed on hardened concrete beam specimens. The results showed that, with increasing the amount of silicone rubber in concrete, flexural strength decreased and this percentage of strength reduction was compared with the percentage of reduction in compression and splitting tensile strength. It was found that the reduction of flexural strength was less than compression and splitting tensile strength. Larger deformation was observed during all tests when the concentration of silicone rubber increased. It was observed that the higher the amount of silicone rubber in the specimens, the less noise and the less separation of aggregates with which the failure of the specimens was associated.

中文翻译：

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液态硅橡胶混凝土抗弯承载力研究

尽管大量使用混凝土，但其缺点是抗张强度，低柔韧性和脆性。已经提供了许多解决方案来消除上述缺陷。为了增加先前研究中混凝土的柔韧性，已将碎橡胶轮胎颗粒添加到混凝土中。回收汽车轮胎可以改善环境，并使混凝土比普通混凝土更具柔韧性。在这项研究中，硅橡胶已被矿物骨料的0％，2％，4％，8％，12.5％，25％和50％代替。该橡胶最初为液体形式，与普通混凝土混合后，分散到混凝土质地中并形成均匀的混合物，并且该液体橡胶在24小时后变成柔韧性固体。含硅橡胶的混凝土是一种具有新性能的新型复合材料，在这项研究中，它被称为混合硅橡胶混凝土（HSRC）。另外，为了评估骨料尺寸对制作实验样品的影响，采用两种粗骨料比细骨料的比率G / S  = 0.7，考虑了1.1。在硬化的混凝土梁样本上进行了抗弯强度测试。结果表明，随着混凝土中硅橡胶含量的增加，抗弯强度降低，该强度降低的百分比与压缩和劈裂拉伸强度的降低百分比相比。发现弯曲强度的降低小于压缩和分裂拉伸强度。当硅橡胶的浓度增加时，在所有测试中都观察到较大的变形。观察到，样品中硅橡胶的含量越高，与样品破坏有关的噪音越小，聚集体的分离越少。