Cement mortar for fixing low-medium level radioactive sundries and preparation method thereof
A radioactive and cement technology, which is applied in the field of cement-fixed mortar preparation of low and medium level radioactive miscellaneous wastes, can solve problems such as the difficulty in meeting the performance of cement mortar, and achieve the effects of strong engineering operability, simple production process and cheap raw materials
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[0032] The preparation method of cement fixing mortar for low and medium level radioactive debris, comprising the following steps:
[0033] (1) Disperse the additive in water to make wet material; mix fly ash, silica fume, cement and sand to make dry material, and the additive is selected from water reducing agent, defoamer and sodium silicate;
[0034] (2) After mixing the wet material and the dry material evenly, transfer to the cement mortar mixer for mortar mixing. The mixing time is 10 to 20 minutes. In the vinyl mold, after the vibration exhaust is completed on the vibrating table, it is put into the curing box for curing. The curing temperature is 25±5℃, and the relative humidity is ≥90%. After curing for 28 days, take out and demould to make a cement mortar sample.
[0035] The testing methods for fluidity, compressive strength and impermeability of cement mortar samples are as follows:
[0036] 1. According to the specific provisions of GB / T2491 "De...
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