Influence of Some Additives on the Properties of OPC Solidified Sandy Silt

Applied Sciences

Keyu Chen¹  Dazhi Wu¹  Zilong Zhang¹  Lifu Chang¹ 

[1] School of Civil Engineering and Architecture, Zhejiang Sci-Tech University, Hangzhou 300018, China;

关键词: sandy silt;    solidification;    additives;    mechanical properties;    microstructure;   

DOI  :  10.3390/app11167252

来源: DOAJ

【 摘 要 】

The ordinary Portland cement (OPC)-based solidification process is used extensively to reinforce soils due to its available and good bonding properties. Alternative products are used in cementitious materials to enhance the strength and to reduce OPC consumption. In this study, the effect of additive type and mass fraction on the microstructure and mechanical properties of solidified sandy silt are investigated. There are four types of additives (gypsum, lime, clay particles, and fly ash) at mass fractions of 2, 3, and 4% that are considered in order to study their mechanical properties (unconfined compression, indirect tensile, flexural strength, and compressive resilient modulus) at 7, 14, 28, 60, and 90 days. The optimal contents of additive gypsum, clay particles, and fly ash are determined to be 2%, 4%, and 4%, respectively. Such improvement of additive-modified OPC solidified sandy silt is due to the formation of the crystalline compound or the gradation composition improvement via field emission scanning electron and X-ray diffraction analysis.

【 授权许可】

Unknown