橡胶混凝土抗冲磨性能的研究

Research on property of abrasion resistance of rubber-filled concrete

探讨了橡胶混凝土在不同水灰比、胶粒掺量、粒径大小的情况下的抗冲磨性能,为进一步改善混凝土的韧性和耐久性提供借鉴。在以往橡胶混凝土研究基础上,采用水下钢球法对混凝土进行抗冲磨强度试验,得出了橡胶混凝土在不同水灰比、胶粒掺量、粒径大小的情况下的抗冲磨性能。从本次试验中可以看出水灰比与橡胶混凝土的抗冲磨强度具有良好关系,水灰比小时,有利于提高混凝土的耐磨性,但是水灰比不能无限制的降低,必须能够提供胶凝材料完全水化所需的水分及保证施工过程中的和易性;随着橡胶颗粒掺量的增加,混凝土的耐磨性先提高后降低。橡胶掺量15%时混凝土的抗冲磨强度最高。当掺量达到30%时,抗冲磨强度反而比未掺入时低;掺入的三种粒径中掺入粒径为（2.36～4.75 mm）的混凝土耐磨性能最佳,其单位磨损量最小。胶粒掺量是影响抗冲磨性能的主要因素,其次为水灰比,第三是胶粒粒径的大小。

The thesis explored the abrasion resistance of rubber-filled concrete in different situations such as water to cement ratio（ W / C Ratio）,particles dosage,particles size in order to offer reference for improving the toughness and durability of concrete. Based on the previous study,the thesis adopted underwater method to test the abrasion resistance of concrete and got the property of abrasion resistance of rubber-filled concrete in the case of different water-cement ratioes,particles dosages,particle sizes. The experiment shows that the relationship between water to cement ratio and abrasion resistance of rubber-filled concrete is close. Less W / C ratio contributes to the abrasion resistance of rubber-filled concrete,but the ratio cannot cut down unlimited and must provide the required moisture of gelled material and ensure the workability in the process of construction; with the increase of mixing amount of rubber particles,the abrasion resistance of concrete first enhances and then reduces. When the mixing amount of rubber particles increases to 15%,the strength of abrasion resistance of concrete reaches the highest. while the dosage gets to 30%,the abrasion resistance of concrete is lower than that without mixing; Among three particles dosages,the one added with the particles of diameter（ 2. 36 ～ 4. 75mm） has the best resistance of concrete,and their unit amount of wear intensity is the lowest. The mixing amount of rubber particles is the main factor that affect abrasion resistance of rubber-filled concrete,followed by W / C ratio and particle size.