Experimental study on the preparation of non-fired bricks from water-based cuttings
LI Shiwei
HE Xin
YU Shijie
GAN Yue
CHEN Chuidong
WEI Yonghong
Abstract：Using water-based rock chips as raw materials,the influence of water-solid ratio,cement mixing amount,alkali e-quivalent and water-based rock chips mixing amount on the curing effect of no-bum bricks was determined through a one-way test.The results showed that m(water-based rock chips)∶m(river sand)∶m(cement)∶m(fly ash)=50∶30∶15∶5,water-solid ratio of 0.12,alkali equivalent of 4％to produce unburnt bricks specimens with excellent performance,the compressive strength of 15.44 MPa,bulk den-sity of 2.249 g/cm3,water absorption of 10.81％,which is in line with the requirements of MU 15 grade in standard JC/T 422-2007'Non-sintered waste tailings'.Through XRD and SEM analyses,it was found that the hydration products in the water-based rock chips non-sintered brick system mainly include hydrated calcium silicate,calomel,calcium hydroxide and so on.With the reduction of water-based rock chips doping,the microporosity of the specimen is reduced,which is macroscopically manifested in the increase of compressive strength and the reduction of water absorption rate of the specimen.
Keywords：water-based cuttingsnon-fired brickalkali activationcompressive strengthmicroanalysis
Publication Date：2024-12-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 72-75,127 )