纳米高性能混凝土抗弯拉性能试验研究  

Experimental Study of Flexural Performance of Nano High Performance Concrete

作　　者：董泽强 

机构地区：[1]河南德馨高速公路有限公司,郑州450000

出　　处：《河南科学》2013年第9期1435-1438,共4页Henan Science

摘　　要：为了得到纳米掺量对高性能混凝土抗弯拉性能的影响规律,以C50高性能混凝土为基础,在保持用水量、水胶比和粉煤灰掺量不变的情况上,取5种纳米SiO2掺量(1%,3%,5%,7%,9%)等量取代胶凝材料进行试验,试验结果表明:纳米SiO2加入高性能混凝土后,有效地提高了纳米高性能混凝土抗弯拉强度、抗弯拉弹性模量和弯压比,且随着纳米SiO2掺量的增加,呈先增大后减小的趋势,在纳米SiO2掺量为5%时均达到最大值,与未掺纳米SiO2高性能混凝土相比,抗弯拉强度和抗弯拉弹性模量分别提高了15.3%和11.4%.该研究结论可为纳米高性能混凝土的应用提供一定参考.To obtain the influencing rule of nano material content on flexural performance of high performance concrete, the flexural experiments were carried out, and five nano Si02 contents （1%, 3%, 5%,7% and 9%） were selected based on the high performance concrete with the strength of C50 with the constant dosage of water, water- binder ratio and fly ash. The experiment results indicate that nano SlOE improved the flexural strength, flexural modulus of elasticity and bending compression ratio. With the increase of nano SiO2, the flexural parameters are increasing at first, and then decreasing gradually. When the content of nano Si02 is 5%, the flexural parameters have maximum values. Compared with the concrete without nano materials, the flexural strength and flexural modulus of elasticity of nano high performance concrete were increased by 15.3% and 11.4%,respectively. The research conclusions can provide reference on the application of nano high performance concrete.

关 键 词：纳米高性能混凝土 抗弯拉强度 抗弯拉弹性模量 

分 类 号：TU528[建筑科学—建筑技术科学]