Mechanism of action of waste slurry supernatant and dry powder from mixing plant in cement
In this paper,the influence mechanism and changing trend of the supernatant and dry powder of waste pulp in mixing plant on cement properties were studied.The results show that waste slurry dry powder significantly increases the water de-mand for cement standard consistency.When the amount of waste slurry dry powder is 30％,the water consumption increases by 29.2％.The water requirement will be slightly reduced in minutes when the two are used together.The waste slurry dry powder signifiicantly shorten the setting time of cement.In contrast,the waste slurry supernatant has a delaying effect on cement setting,but when used together,it has no significant effect on the setting time.When the content of waste slurry dry powder is not more than 10％,it can still meet the mechanical properties requirements of P·O42.5R cement as specified in GB 175-2007 General Portland Cement,while the waste slurry supernatant has almost no effect on the mechanical properties of cement.When the two are used together,with the increase of waste slurry supernatant,the flexural and compressive strength of cement also decrease.
万方数据
维普
