文献类型：期刊文献

英文题名：The effects of silanized rubber and nano-SiO2 on microstructure and frost resistance characteristics of concrete using response surface methodology (RSM)

作者：Shi, Jicun[1];Zhao, Lei[1];Han, Chun[1];Han, Hongxing[1]

第一作者：Shi, Jicun

通讯作者：Shi, JC[1]

机构：[1]Xinxiang Univ, Sch Civil Engn & Architecture, Xinxiang 453003, Henan, Peoples R China

第一机构：新乡学院土木工程与建筑学院

通讯机构：[1]corresponding author), Xinxiang Univ, Sch Civil Engn & Architecture, Xinxiang 453003, Henan, Peoples R China.|[1107114]新乡学院土木工程与建筑学院;[11071]新乡学院;

年份：2022

卷号：344

外文期刊名：CONSTRUCTION AND BUILDING MATERIALS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000855050100002)】；

基金：The authors are grateful for the financial support by the National Key R&D Program of China (grant number 2018YFE0120200) and the Science and Technology Project of Henan Province (grant number 212102310038).

语种：英文

外文关键词：Silanized rubber; Nano-silica; Concrete; Frost-resistant; Microstructure; Response surface methodology

摘要：Waste rubber powder can be used to enhance the frost resistance of cement concrete. Conventionally, only the rubber powder is directly mixed into concrete, but its mechanical properties are reduced significantly. However, mixing modified rubber, nanometer materials, lime ash, and cement concrete can improve the frost resistance and compressive strength of concrete at the same time. The main objective of this paper is to evaluate the potentiality of utilizing silanized rubber (SR) powder and nano-SiO2 (NS) to develop frost-resistant concretes. Determination of the frost-resistant effect of concrete mixture incorporated with SR and NS on the pore structure and mechanical characteristics was performed by response surface methodology (RSM). Results of scanning electron microscopy (SEM) tests along with Fourier transform infrared spectroscopy (FT-IR) are reported to evaluate the effect of frost resistance from microstructure. Results of the conducted tests show that the combination of SR and NS has a synergistic effect, which makes the distribution of voids in concrete more uniform, and the damage of mass loss rate and relative dynamic modulus of elastic (RDME) after a freeze-thaw cycle is lower. At the optimum content of designed concrete, there is a high correlation between frost resistance and void structure.