基于橡胶粒径、掺量的混凝土强度公式拟合

Concrete-Streng Function Based on The Rubber Particle Size and Dosage

试验用3种不同粒径的橡胶颗粒以5种掺量配制橡胶混凝土,橡胶颗粒改性采用Na OH和KH570复合改性方法,得到3 d^360 d养护龄期的混凝土抗压强度值,回归分析橡胶混凝土抗压强度与养护龄期、橡胶颗粒掺量、橡胶颗粒粒径及改性方法的函数关系。试验结果表明:橡胶混凝土抗压强度随橡胶颗粒掺量增加而减小,橡胶颗粒粒径较大,橡胶混凝土抗压强度也较大;橡胶混凝土改性后抗压强度比改性前提高了15%左右;得出的橡胶混凝土立方体抗压强度计算式可较方便地指导不同强度橡胶混凝土的配制和工程应用中橡胶混凝土抗压强度的估算。

A formula was proposed by tests which take three different particle size of rubber particles and five kinds of content in concrete to make Rubber concrete. The rubber particles is modified by Na OH and KH570. The tests of rubber compressive strength that contains curing age,rubber granule,rubber particle size and dosage under the concrete compressive strength of 3 d - 360 d curing age were carried out. The results showed that rubber concrete compressive strength decreased with increased of rubber granule,and rubber concrete＇s compressive strength is larger which have larger rubber particle. The rubber concrete modified have a 15% higher compressive strength. The calculation formula of rubber concrete cube compressive strength can be easily adopted to made different strength of rubber concrete and estimate concrete compressive strength in practical projects.