Open AccessStudy on Preparation and Performance of Fly Ash Used in Clay Fluidized Backfill Materials
Author(s) -
Xianghui Kong,
Xiaohua Yu,
Youcai Zhao
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/719/2/022094
Subject(s) - fly ash , compaction , cement , compressive strength , raw material , materials science , proctor compaction test , geotechnical engineering , waste management , composite material , geology , engineering , chemistry , organic chemistry
The problem of insufficient compaction of traditional fillers is difficult to solve in the backfilling project. It is a new solution to prepare backfill materials with self-leveling and self-compacting properties by using excavated clay, cement and water as raw materials. Adding fly ash to the backfill materials to replace part of the cement can effectively improve the utilization of industrial waste. Through a series of laboratory tests, the fluidity, bleeding and compressive strength of the mixture were studied respectively, and the influence of fly ash content on the performance of the mixture was preliminarily grasped. The test results show that the increase of fly ash content can reduce the fluidity of the mixture. Compared with the strength of the mixture without fly ash, when the amount of fly ash replacing cement is less than 10%, the strength of the mixture increases, and when the amount of fly ash replacing cement is more than 15%, the strength of the mixture decreases.