Design and evaluation of an innovative composite silicate-based surface treatment agent of concrete

作者：Qiao Dong, Xinyuan Cao, Sike Wang, Xueqin Chen, Bohan Yang, Shengjia Xie, Zhiqiang Cheng · 发表于：Case Studies in Construction Materials · 年份：2023 · DOI：10.1016/j.cscm.2023.e02207 · 被引用次数：14 · 研究领域：Concrete and Cement Materials Research、Magnesium Oxide Properties and Applications、Innovative concrete reinforcement materials

Silicate-based surface treatment agent is a sustainable material to provide a sealing coat on the surface of Portland cement concrete to improve its hardness, impermeability, chemical durability, and abrasion resistance. A type of composite surface treatment agent of concrete is introduced in the paper, using potassium silicate and lithium silicate as main agents and different contents of lithium sulfate, urea, triethanolamine, organosilicon polyether surfactant, and fluorocarbon surfactant as additives. An orthogonal test was conducted to evaluate the effects of different proportions of the two main agents and five additives. The gelation time and viscosity of the agent and the rebound value and penetration depth of the tested concrete samples were tested to evaluate the performance of the designed composite material. The results showed that the two main agents had significant influences on the viscosity, while potassium silicate had the greatest influence on the rebound value. For penetration depth, urea, triethanolamine, organosilicon polyether nonionic surfactants, and fluorocarbon surfactants all had significant effects. The proper ingredients were selected based on the test results, and the optimum proportion of the designed surface treatment agent was determined based on variance analysis of the test results. Two representative commercial inorganic surface treatment agents were selected to compare with the optimum proportion of the designed material, and the effects of...